repos/blastem: flac.c annotate

annotate flac.c @ 2496:187bc857a76a default tip

Fix bug in MED mapper protection bit implementation

author	Michael Pavone <pavone@retrodev.com>
date	Sun, 28 Apr 2024 23:33:11 -0700
parents	9d68799f945b
children

rev	line source
2296 789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	1 #include <stdlib.h>
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	2 #include <string.h>
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	3 #include <inttypes.h>
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	4 #include "flac.h"
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	5
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	6 static uint8_t read_byte_buffer(flac_file *f)
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	7 {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	8 if (f->offset >= f->buffer_size) {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	9 return 0;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	10 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	11 uint8_t *buf = f->read_data;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	12 return buf[f->offset++];
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	13 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	14
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	15 static void seek_buffer(flac_file *f, uint32_t offset, uint8_t relative)
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	16 {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	17 f->offset = relative ? f->offset + offset : offset;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	18 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	19
2298 9d68799f945b Added basic FLAC seek implementation and added support for FLAC tracks in CUE sheets Michael Pavone <pavone@retrodev.com> parents: 2296 diff changeset	20 static uint32_t tell_buffer(flac_file *f)
9d68799f945b Added basic FLAC seek implementation and added support for FLAC tracks in CUE sheets Michael Pavone <pavone@retrodev.com> parents: 2296 diff changeset	21 {
9d68799f945b Added basic FLAC seek implementation and added support for FLAC tracks in CUE sheets Michael Pavone <pavone@retrodev.com> parents: 2296 diff changeset	22 return f->offset;
9d68799f945b Added basic FLAC seek implementation and added support for FLAC tracks in CUE sheets Michael Pavone <pavone@retrodev.com> parents: 2296 diff changeset	23 }
9d68799f945b Added basic FLAC seek implementation and added support for FLAC tracks in CUE sheets Michael Pavone <pavone@retrodev.com> parents: 2296 diff changeset	24
2296 789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	25 static uint8_t read_byte_file(flac_file *f)
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	26 {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	27 int result = fgetc(f->read_data);
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	28 if (result == EOF) {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	29 return 0;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	30 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	31 return result;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	32 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	33
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	34 static void seek_file(flac_file *f, uint32_t offset, uint8_t relative)
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	35 {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	36 fseek(f->read_data, offset, relative ? SEEK_CUR : SEEK_SET);
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	37 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	38
2298 9d68799f945b Added basic FLAC seek implementation and added support for FLAC tracks in CUE sheets Michael Pavone <pavone@retrodev.com> parents: 2296 diff changeset	39 static uint32_t tell_file(flac_file *f)
9d68799f945b Added basic FLAC seek implementation and added support for FLAC tracks in CUE sheets Michael Pavone <pavone@retrodev.com> parents: 2296 diff changeset	40 {
9d68799f945b Added basic FLAC seek implementation and added support for FLAC tracks in CUE sheets Michael Pavone <pavone@retrodev.com> parents: 2296 diff changeset	41 return ftell(f->read_data);
9d68799f945b Added basic FLAC seek implementation and added support for FLAC tracks in CUE sheets Michael Pavone <pavone@retrodev.com> parents: 2296 diff changeset	42 }
9d68799f945b Added basic FLAC seek implementation and added support for FLAC tracks in CUE sheets Michael Pavone <pavone@retrodev.com> parents: 2296 diff changeset	43
2296 789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	44 static void read_chars(flac_file f, char dest, uint32_t count)
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	45 {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	46 for (; count > 0; --count)
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	47 {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	48 *(dest++) = f->read_byte(f);
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	49 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	50 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	51
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	52 static uint16_t read16(flac_file *f)
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	53 {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	54 uint16_t ret = f->read_byte(f) << 8;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	55 ret \|= f->read_byte(f);
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	56 return ret;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	57 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	58
2298 9d68799f945b Added basic FLAC seek implementation and added support for FLAC tracks in CUE sheets Michael Pavone <pavone@retrodev.com> parents: 2296 diff changeset	59 static uint64_t read64(flac_file *f)
9d68799f945b Added basic FLAC seek implementation and added support for FLAC tracks in CUE sheets Michael Pavone <pavone@retrodev.com> parents: 2296 diff changeset	60 {
9d68799f945b Added basic FLAC seek implementation and added support for FLAC tracks in CUE sheets Michael Pavone <pavone@retrodev.com> parents: 2296 diff changeset	61 uint64_t value = ((uint64_t)f->read_byte(f)) << 56;
9d68799f945b Added basic FLAC seek implementation and added support for FLAC tracks in CUE sheets Michael Pavone <pavone@retrodev.com> parents: 2296 diff changeset	62 value \|= ((uint64_t)f->read_byte(f)) << 48;
9d68799f945b Added basic FLAC seek implementation and added support for FLAC tracks in CUE sheets Michael Pavone <pavone@retrodev.com> parents: 2296 diff changeset	63 value \|= ((uint64_t)f->read_byte(f)) << 40;
9d68799f945b Added basic FLAC seek implementation and added support for FLAC tracks in CUE sheets Michael Pavone <pavone@retrodev.com> parents: 2296 diff changeset	64 value \|= ((uint64_t)f->read_byte(f)) << 32;
9d68799f945b Added basic FLAC seek implementation and added support for FLAC tracks in CUE sheets Michael Pavone <pavone@retrodev.com> parents: 2296 diff changeset	65 value \|= ((uint64_t)f->read_byte(f)) << 24;
9d68799f945b Added basic FLAC seek implementation and added support for FLAC tracks in CUE sheets Michael Pavone <pavone@retrodev.com> parents: 2296 diff changeset	66 value \|= f->read_byte(f) << 16;
9d68799f945b Added basic FLAC seek implementation and added support for FLAC tracks in CUE sheets Michael Pavone <pavone@retrodev.com> parents: 2296 diff changeset	67 value \|= f->read_byte(f) << 8;
9d68799f945b Added basic FLAC seek implementation and added support for FLAC tracks in CUE sheets Michael Pavone <pavone@retrodev.com> parents: 2296 diff changeset	68 value \|= f->read_byte(f);
9d68799f945b Added basic FLAC seek implementation and added support for FLAC tracks in CUE sheets Michael Pavone <pavone@retrodev.com> parents: 2296 diff changeset	69 return value;
9d68799f945b Added basic FLAC seek implementation and added support for FLAC tracks in CUE sheets Michael Pavone <pavone@retrodev.com> parents: 2296 diff changeset	70 }
9d68799f945b Added basic FLAC seek implementation and added support for FLAC tracks in CUE sheets Michael Pavone <pavone@retrodev.com> parents: 2296 diff changeset	71
2296 789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	72 static uint32_t read_bits(flac_file *f, uint32_t num_bits)
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	73 {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	74 uint32_t ret = 0;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	75 while (num_bits)
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	76 {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	77 if (!f->bits) {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	78 f->cur_byte = f->read_byte(f);
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	79 f->bits = 8;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	80 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	81 uint32_t new_bits = f->bits;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	82 if (new_bits > num_bits) {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	83 new_bits = num_bits;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	84 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	85 ret <<= new_bits;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	86 uint32_t mask = (1 << new_bits) - 1;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	87 ret \|= (f->cur_byte >> (f->bits - new_bits)) & mask;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	88 f->bits -= new_bits;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	89 num_bits -= new_bits;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	90 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	91 return ret;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	92 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	93
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	94 static uint64_t read_bits64(flac_file *f, uint64_t num_bits)
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	95 {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	96 uint64_t ret = 0;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	97 while (num_bits)
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	98 {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	99 if (!f->bits) {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	100 f->cur_byte = f->read_byte(f);
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	101 f->bits = 8;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	102 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	103 uint64_t new_bits = f->bits;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	104 if (new_bits > num_bits) {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	105 new_bits = num_bits;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	106 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	107 ret <<= new_bits;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	108 uint64_t mask = (1 << new_bits) - 1;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	109 ret \|= f->cur_byte & mask;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	110 f->cur_byte >>= new_bits;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	111 f->bits -= new_bits;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	112 num_bits -= new_bits;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	113 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	114 return ret;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	115 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	116
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	117 typedef struct {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	118 uint32_t size;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	119 uint8_t type;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	120 uint8_t is_last;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	121 } meta_block_header;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	122
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	123 enum {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	124 STREAMINFO,
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	125 PADDING,
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	126 APPLICATION,
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	127 SEEKTABLE,
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	128 VORBIS_COMMENT,
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	129 CUESHEET,
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	130 PICTURE
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	131 };
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	132
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	133 static void read_meta_block_header(flac_file f, meta_block_header dest)
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	134 {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	135 dest->is_last = read_bits(f, 1);
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	136 dest->type = read_bits(f, 7);
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	137 dest->size = read_bits(f, 24);
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	138 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	139
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	140 static void parse_streaminfo(flac_file *f)
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	141 {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	142 read16(f);//min block size
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	143 read16(f);//max block size
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	144 read_bits(f, 24);//min frame size
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	145 read_bits(f, 24);//max frame size
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	146 f->sample_rate = read_bits(f, 20);
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	147 f->channels = read_bits(f, 3) + 1;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	148 f->bits_per_sample = read_bits(f, 5) + 1;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	149 f->total_samples = read_bits64(f, 36);
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	150 f->seek(f, 16, 1);//MD5
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	151 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	152
2298 9d68799f945b Added basic FLAC seek implementation and added support for FLAC tracks in CUE sheets Michael Pavone <pavone@retrodev.com> parents: 2296 diff changeset	153 static void parse_seektable(flac_file *f, uint32_t size)
9d68799f945b Added basic FLAC seek implementation and added support for FLAC tracks in CUE sheets Michael Pavone <pavone@retrodev.com> parents: 2296 diff changeset	154 {
9d68799f945b Added basic FLAC seek implementation and added support for FLAC tracks in CUE sheets Michael Pavone <pavone@retrodev.com> parents: 2296 diff changeset	155 f->num_seekpoints = size / 18;
9d68799f945b Added basic FLAC seek implementation and added support for FLAC tracks in CUE sheets Michael Pavone <pavone@retrodev.com> parents: 2296 diff changeset	156 f->seekpoints = calloc(f->num_seekpoints, sizeof(flac_seekpoint));
9d68799f945b Added basic FLAC seek implementation and added support for FLAC tracks in CUE sheets Michael Pavone <pavone@retrodev.com> parents: 2296 diff changeset	157 for (uint32_t i = 0; i < f->num_seekpoints; i++)
9d68799f945b Added basic FLAC seek implementation and added support for FLAC tracks in CUE sheets Michael Pavone <pavone@retrodev.com> parents: 2296 diff changeset	158 {
9d68799f945b Added basic FLAC seek implementation and added support for FLAC tracks in CUE sheets Michael Pavone <pavone@retrodev.com> parents: 2296 diff changeset	159 f->seekpoints[i].sample_number = read64(f);
9d68799f945b Added basic FLAC seek implementation and added support for FLAC tracks in CUE sheets Michael Pavone <pavone@retrodev.com> parents: 2296 diff changeset	160 f->seekpoints[i].offset = read64(f);
9d68799f945b Added basic FLAC seek implementation and added support for FLAC tracks in CUE sheets Michael Pavone <pavone@retrodev.com> parents: 2296 diff changeset	161 f->seekpoints[i].sample_count = read16(f);
9d68799f945b Added basic FLAC seek implementation and added support for FLAC tracks in CUE sheets Michael Pavone <pavone@retrodev.com> parents: 2296 diff changeset	162 }
9d68799f945b Added basic FLAC seek implementation and added support for FLAC tracks in CUE sheets Michael Pavone <pavone@retrodev.com> parents: 2296 diff changeset	163 }
9d68799f945b Added basic FLAC seek implementation and added support for FLAC tracks in CUE sheets Michael Pavone <pavone@retrodev.com> parents: 2296 diff changeset	164
2296 789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	165 static uint8_t parse_header(flac_file *f)
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	166 {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	167 char id[4];
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	168 read_chars(f, id, sizeof(id));
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	169 if (memcmp("fLaC", id, sizeof(id))) {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	170 return 0;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	171 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	172 meta_block_header header;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	173 do {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	174 read_meta_block_header(f, &header);
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	175 if (header.type == STREAMINFO) {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	176 parse_streaminfo(f);
2298 9d68799f945b Added basic FLAC seek implementation and added support for FLAC tracks in CUE sheets Michael Pavone <pavone@retrodev.com> parents: 2296 diff changeset	177 } else if (header.type == SEEKTABLE) {
9d68799f945b Added basic FLAC seek implementation and added support for FLAC tracks in CUE sheets Michael Pavone <pavone@retrodev.com> parents: 2296 diff changeset	178 parse_seektable(f, header.size);
2296 789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	179 } else {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	180 f->seek(f, header.size, 1);
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	181 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	182 } while (!header.is_last);
2298 9d68799f945b Added basic FLAC seek implementation and added support for FLAC tracks in CUE sheets Michael Pavone <pavone@retrodev.com> parents: 2296 diff changeset	183 f->first_frame_offset = f->tell(f);
2296 789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	184 return 1;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	185 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	186
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	187 flac_file flac_file_from_buffer(void buffer, uint32_t size)
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	188 {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	189 flac_file *f = calloc(1, sizeof(flac_file));
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	190 f->read_data = buffer;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	191 f->read_byte = read_byte_buffer;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	192 f->seek = seek_buffer;
2298 9d68799f945b Added basic FLAC seek implementation and added support for FLAC tracks in CUE sheets Michael Pavone <pavone@retrodev.com> parents: 2296 diff changeset	193 f->tell = tell_buffer;
2296 789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	194 f->buffer_size = size;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	195 if (parse_header(f)) {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	196 return f;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	197 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	198 free(f);
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	199 return NULL;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	200 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	201
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	202 flac_file flac_file_from_file(FILE file)
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	203 {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	204 flac_file *f = calloc(1, sizeof(flac_file));
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	205 f->read_data = file;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	206 f->read_byte = read_byte_file;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	207 f->seek = seek_file;
2298 9d68799f945b Added basic FLAC seek implementation and added support for FLAC tracks in CUE sheets Michael Pavone <pavone@retrodev.com> parents: 2296 diff changeset	208 f->tell = tell_file;
2296 789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	209 if (parse_header(f)) {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	210 return f;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	211 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	212 free(f);
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	213 return NULL;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	214 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	215
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	216 static uint64_t read_utf64(flac_file *f)
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	217 {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	218 uint8_t byte = f->read_byte(f);
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	219 if (!(byte & 0x80)) {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	220 return byte;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	221 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	222 uint8_t mask = 0x40;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	223 uint8_t length = 0;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	224 while (byte & mask)
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	225 {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	226 mask >>= 1;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	227 length++;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	228 }
2298 9d68799f945b Added basic FLAC seek implementation and added support for FLAC tracks in CUE sheets Michael Pavone <pavone@retrodev.com> parents: 2296 diff changeset	229 uint64_t value = byte & (mask - 1);
2296 789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	230 for (uint8_t i = 0; i < length; i++)
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	231 {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	232 value <<= 6;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	233 value \|= f->read_byte(f) & 0x3F;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	234 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	235 return value;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	236 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	237
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	238 static uint32_t read_utf32(flac_file *f)
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	239 {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	240 uint8_t byte = f->read_byte(f);
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	241 if (!(byte & 0x80)) {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	242 return byte;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	243 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	244 uint8_t mask = 0x40;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	245 uint8_t length = 0;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	246 while (byte & mask)
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	247 {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	248 mask >>= 1;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	249 length++;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	250 }
2298 9d68799f945b Added basic FLAC seek implementation and added support for FLAC tracks in CUE sheets Michael Pavone <pavone@retrodev.com> parents: 2296 diff changeset	251 uint32_t value = byte & (mask - 1);
2296 789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	252 for (uint8_t i = 0; i < length; i++)
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	253 {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	254 value <<= 6;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	255 value \|= f->read_byte(f) & 0x3F;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	256 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	257 return value;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	258 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	259
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	260 static uint8_t parse_frame_header(flac_file *f)
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	261 {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	262 uint16_t sync = read_bits(f, 14);
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	263 if (sync != 0x3FFE) {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	264 fprintf(stderr, "Invalid sync FLAC sync pattern: %X\n", sync);
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	265 return 0;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	266 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	267 read_bits(f, 1);//reserved
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	268 uint8_t block_size_strategy = read_bits(f, 1);
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	269 uint8_t block_size_code = read_bits(f, 4);
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	270 uint8_t sample_rate_code = read_bits(f, 4);
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	271 uint8_t channels = read_bits(f, 4);
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	272 uint8_t joint_stereo = 0;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	273 if (channels > 7) {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	274 joint_stereo = (channels & 7) + 1;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	275 channels = 2;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	276 } else {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	277 ++channels;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	278 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	279 f->frame_channels = channels;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	280 f->frame_joint_stereo = joint_stereo;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	281 uint8_t bits_per_sample_code = read_bits(f, 3);
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	282 if (!bits_per_sample_code) {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	283 f->frame_bits_per_sample = f->bits_per_sample;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	284 } else if (bits_per_sample_code < 3) {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	285 f->frame_bits_per_sample = 4 + 4 * bits_per_sample_code;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	286 } else {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	287 f->frame_bits_per_sample = 4 * bits_per_sample_code;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	288 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	289 read_bits(f, 1);//reserved
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	290 uint32_t block_num;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	291 if (block_size_strategy) {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	292 f->frame_start_sample = read_utf64(f);
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	293 } else {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	294 block_num = read_utf32(f);
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	295 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	296 uint32_t block_size = 0;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	297 switch (block_size_code)
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	298 {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	299 case 0:
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	300 fputs("Detected reserved block size 0", stderr);
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	301 return 0;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	302 case 1:
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	303 block_size = 192;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	304 break;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	305 case 6:
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	306 block_size = f->read_byte(f) + 1;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	307 break;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	308 case 7:
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	309 block_size = read16(f) + 1;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	310 break;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	311 default:
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	312 if (block_size_code < 8) {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	313 block_size = 576 * (1 << (block_size_code - 2));
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	314 } else {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	315 block_size = 256 * (1 << (block_size_code - 8));
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	316 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	317 break;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	318 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	319 f->frame_block_size = block_size;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	320 if (!block_size_strategy) {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	321 f->frame_start_sample = ((uint64_t)block_num) * ((uint64_t)block_size);
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	322 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	323 uint32_t sample_rate;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	324 switch (sample_rate_code)
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	325 {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	326 case 15:
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	327 fputs("Invalid frame header sample rate", stderr);
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	328 case 0:
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	329 sample_rate = f->sample_rate;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	330 break;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	331 case 1:
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	332 sample_rate = 88200;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	333 break;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	334 case 2:
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	335 sample_rate = 176400;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	336 break;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	337 case 3:
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	338 sample_rate = 192000;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	339 break;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	340 case 4:
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	341 sample_rate = 8000;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	342 break;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	343 case 5:
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	344 sample_rate = 16000;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	345 break;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	346 case 6:
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	347 sample_rate = 22050;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	348 break;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	349 case 7:
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	350 sample_rate = 44100;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	351 break;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	352 case 8:
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	353 sample_rate = 32000;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	354 break;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	355 case 9:
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	356 sample_rate = 44100;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	357 break;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	358 case 10:
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	359 sample_rate = 48000;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	360 break;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	361 case 11:
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	362 sample_rate = 96000;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	363 break;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	364 case 12:
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	365 sample_rate = f->read_byte(f) * 1000;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	366 break;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	367 case 13:
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	368 sample_rate = read16(f);
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	369 break;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	370 case 14:
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	371 sample_rate = read16(f) * 10;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	372 break;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	373 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	374 f->frame_sample_rate = sample_rate;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	375 f->read_byte(f);//CRC-8
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	376 return 1;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	377 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	378
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	379 enum {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	380 SUBFRAME_CONSTANT,
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	381 SUBFRAME_VERBATIM,
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	382 SUBFRAME_FIXED = 8,
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	383 SUBFRAME_LPC = 0x20,
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	384 };
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	385
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	386 static int32_t sign_extend(uint32_t value, uint32_t bits)
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	387 {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	388 if (value & (1 << (bits - 1))) {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	389 value \|= ~((1 << bits) - 1);
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	390 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	391 return value;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	392 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	393
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	394 static int32_t signed_sample(uint32_t sample_bits, uint32_t sample, uint8_t wasted_bits)
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	395 {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	396 sample <<= wasted_bits;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	397 sample = sign_extend(sample, sample_bits);
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	398 return sample;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	399 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	400
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	401 static void decode_residuals(flac_file f, flac_subframe sub, int64_t *coefficients, uint32_t order, int64_t shift)
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	402 {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	403 uint8_t residual_method = read_bits(f, 2);
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	404 uint8_t rice_param_bits = residual_method ? 5 : 4;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	405 uint32_t partition_count = 1 << read_bits(f, 4);
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	406 uint32_t cur = order;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	407 uint32_t partition_size = f->frame_block_size / partition_count;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	408 for (uint32_t partition = 0; partition < partition_count; partition++)
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	409 {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	410 uint32_t rice_param = read_bits(f, rice_param_bits);
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	411 if (rice_param == (1 << rice_param_bits) - 1) {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	412 //escape code, residuals are unencoded
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	413 rice_param = read_bits(f, rice_param_bits);
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	414 for (uint32_t end = partition ? cur + partition_size : partition_size; cur < end; cur++)
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	415 {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	416 int64_t prediction = 0;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	417 for (uint32_t i = 0; i < order; i++)
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	418 {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	419 prediction += ((int64_t)sub->decoded[cur - 1 - i]) * coefficients[i];
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	420 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	421 if (shift) {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	422 prediction >>= shift;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	423 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	424 prediction += sign_extend(read_bits(f, rice_param), rice_param);
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	425 sub->decoded[cur] = prediction;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	426 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	427 } else {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	428 for (uint32_t end = partition ? cur + partition_size : partition_size; cur < end; cur++)
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	429 {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	430 int64_t prediction = 0;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	431 for (uint32_t i = 0; i < order; i++)
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	432 {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	433 prediction += ((int64_t)sub->decoded[cur - 1 - i]) * coefficients[i];
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	434 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	435 if (shift) {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	436 prediction >>= shift;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	437 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	438 uint32_t residual = 0;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	439 while (!read_bits(f, 1))
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	440 {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	441 ++residual;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	442 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	443 residual <<= rice_param;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	444 residual \|= read_bits(f, rice_param);
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	445 if (residual & 1) {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	446 sub->decoded[cur] = prediction - (residual >> 1) - 1;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	447 } else {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	448 sub->decoded[cur] = prediction + (residual >> 1);
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	449 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	450 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	451 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	452 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	453 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	454
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	455 static void decode_subframe(flac_file f, flac_subframe sub)
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	456 {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	457 if (f->frame_block_size > sub->allocated_samples) {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	458 sub->decoded = realloc(sub->decoded, sizeof(int32_t) * f->frame_block_size);
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	459 sub->allocated_samples = f->frame_block_size ;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	460 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	461 int64_t prediction_coefficients[32];
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	462 read_bits(f, 1);//reserved
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	463 uint8_t type = read_bits(f, 6);
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	464 uint8_t has_wasted_bits = read_bits(f, 1);
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	465 uint8_t wasted_bits = 0;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	466 if (has_wasted_bits) {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	467 ++wasted_bits;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	468 while (!read_bits(f, 1))
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	469 {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	470 ++wasted_bits;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	471 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	472 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	473 uint32_t sample_bits = f->frame_bits_per_sample - wasted_bits;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	474 if (f->frame_joint_stereo) {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	475 int channel = sub - f->subframes;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	476 if (f->frame_joint_stereo == 2 && !channel \|\| (channel && f->frame_joint_stereo != 2)) {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	477 sample_bits++;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	478 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	479 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	480 if (type == SUBFRAME_CONSTANT) {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	481 int32_t sample = signed_sample(sample_bits, read_bits(f, sample_bits), wasted_bits);
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	482 for (uint32_t i = 0; i < f->frame_block_size; i++)
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	483 {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	484 sub->decoded[i] = sample;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	485 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	486 } else if (type == SUBFRAME_VERBATIM) {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	487 for (uint32_t i = 0; i < f->frame_block_size; i++)
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	488 {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	489 sub->decoded[i] = signed_sample(sample_bits, read_bits(f, sample_bits), wasted_bits);
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	490 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	491 } else if (type & SUBFRAME_LPC) {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	492 uint32_t order = (type & 0x1F) + 1;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	493 for (uint32_t i = 0; i < order; i++)
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	494 {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	495 sub->decoded[i] = signed_sample(sample_bits, read_bits(f, sample_bits), wasted_bits);
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	496 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	497 uint32_t coefficient_bits = read_bits(f, 4) + 1;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	498 int64_t shift_bits = read_bits(f, 5);
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	499 for (uint32_t i = 0; i < order; i++)
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	500 {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	501 prediction_coefficients[i] = sign_extend(read_bits(f, coefficient_bits), coefficient_bits);
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	502 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	503 decode_residuals(f, sub, prediction_coefficients, order, shift_bits);
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	504 } else if (type & SUBFRAME_FIXED) {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	505 uint32_t order = type & 7;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	506 for (uint32_t i = 0; i < order; i++)
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	507 {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	508 sub->decoded[i] = signed_sample(sample_bits, read_bits(f, sample_bits), wasted_bits);
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	509 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	510 switch (order)
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	511 {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	512 case 1:
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	513 prediction_coefficients[0] = 1;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	514 break;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	515 case 2:
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	516 prediction_coefficients[0] = 2;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	517 prediction_coefficients[1] = -1;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	518 break;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	519 case 3:
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	520 prediction_coefficients[0] = 3;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	521 prediction_coefficients[1] = -3;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	522 prediction_coefficients[2] = 1;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	523 break;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	524 case 4:
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	525 prediction_coefficients[0] = 4;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	526 prediction_coefficients[1] = -6;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	527 prediction_coefficients[2] = 4;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	528 prediction_coefficients[3] = -1;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	529 break;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	530 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	531 decode_residuals(f, sub, prediction_coefficients, order, 0);
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	532 } else {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	533 fprintf(stderr, "Invalid subframe type %X\n", type);
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	534 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	535 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	536
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	537 static uint8_t decode_frame(flac_file *f)
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	538 {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	539 if (!parse_frame_header(f)) {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	540 return 0;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	541 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	542 if (f->frame_channels > f->subframe_alloc) {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	543 f->subframes = realloc(f->subframes, sizeof(flac_subframe) * f->frame_channels);
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	544 memset(f->subframes + f->subframe_alloc, 0, sizeof(flac_subframe) * (f->frame_channels - f->subframe_alloc));
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	545 f->subframe_alloc = f->frame_channels;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	546 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	547 for (uint8_t channel = 0; channel < f->frame_channels; channel++)
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	548 {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	549 decode_subframe(f, f->subframes + channel);
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	550 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	551 f->bits = 0;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	552 read16(f);//Frame footer CRC-16
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	553 f->frame_sample_pos = 0;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	554 return 1;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	555 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	556
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	557 uint8_t flac_get_sample(flac_file f, int16_t out, uint8_t desired_channels)
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	558 {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	559 if (f->frame_sample_pos == f->frame_block_size) {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	560 if (!decode_frame(f)) {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	561 return 0;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	562 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	563 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	564 uint8_t copy_channels;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	565 if (f->frame_channels == 1 && desired_channels > 1) {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	566 int16_t sample = f->subframes->decoded[f->frame_sample_pos];
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	567 *(out++) = sample;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	568 *(out++) = sample;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	569 copy_channels = 2;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	570 } else {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	571 int32_t left, right, mid, diff;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	572 switch (f->frame_joint_stereo)
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	573 {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	574 case 0:
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	575 copy_channels = desired_channels;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	576 if (copy_channels > f->frame_channels) {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	577 copy_channels = f->frame_channels;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	578 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	579 for (uint8_t i = 0; i < copy_channels; i++)
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	580 {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	581 *(out++) = f->subframes[i].decoded[f->frame_sample_pos];
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	582 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	583 break;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	584 case 1:
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	585 //left-side
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	586 copy_channels = 2;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	587 *(out++) = left = f->subframes[0].decoded[f->frame_sample_pos];
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	588 if (desired_channels > 1) {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	589 *(out++) = left + f->subframes[1].decoded[f->frame_sample_pos];
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	590 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	591 break;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	592 case 2:
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	593 //side-right
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	594 copy_channels = 2;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	595 right = f->subframes[1].decoded[f->frame_sample_pos];
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	596 left = right + f->subframes[0].decoded[f->frame_sample_pos];
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	597 *(out++) = left;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	598 if (desired_channels > 1) {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	599 *(out++) = right;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	600 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	601 break;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	602 case 3:
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	603 //mid-side
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	604 copy_channels = 2;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	605 mid = f->subframes[0].decoded[f->frame_sample_pos];
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	606 diff = f->subframes[1].decoded[f->frame_sample_pos];
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	607 left = (diff + 2 * mid) >> 1;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	608 *(out++) = left;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	609 if (desired_channels > 1) {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	610 *(out++) = left - diff;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	611 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	612 break;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	613 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	614 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	615 for (uint8_t i = copy_channels; i < desired_channels; i++)
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	616 {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	617 *(out++) = 0;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	618 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	619 f->frame_sample_pos++;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	620
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	621 return 1;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	622 }
2298 9d68799f945b Added basic FLAC seek implementation and added support for FLAC tracks in CUE sheets Michael Pavone <pavone@retrodev.com> parents: 2296 diff changeset	623
9d68799f945b Added basic FLAC seek implementation and added support for FLAC tracks in CUE sheets Michael Pavone <pavone@retrodev.com> parents: 2296 diff changeset	624 void flac_seek(flac_file *f, uint64_t sample_number)
9d68799f945b Added basic FLAC seek implementation and added support for FLAC tracks in CUE sheets Michael Pavone <pavone@retrodev.com> parents: 2296 diff changeset	625 {
9d68799f945b Added basic FLAC seek implementation and added support for FLAC tracks in CUE sheets Michael Pavone <pavone@retrodev.com> parents: 2296 diff changeset	626 if (sample_number >= f->frame_start_sample && sample_number < f->frame_start_sample + f->frame_block_size) {
9d68799f945b Added basic FLAC seek implementation and added support for FLAC tracks in CUE sheets Michael Pavone <pavone@retrodev.com> parents: 2296 diff changeset	627 f->frame_sample_pos = sample_number - f->frame_start_sample;
9d68799f945b Added basic FLAC seek implementation and added support for FLAC tracks in CUE sheets Michael Pavone <pavone@retrodev.com> parents: 2296 diff changeset	628 return;
9d68799f945b Added basic FLAC seek implementation and added support for FLAC tracks in CUE sheets Michael Pavone <pavone@retrodev.com> parents: 2296 diff changeset	629 }
9d68799f945b Added basic FLAC seek implementation and added support for FLAC tracks in CUE sheets Michael Pavone <pavone@retrodev.com> parents: 2296 diff changeset	630 uint32_t best_seekpoint = f->num_seekpoints + 1;
9d68799f945b Added basic FLAC seek implementation and added support for FLAC tracks in CUE sheets Michael Pavone <pavone@retrodev.com> parents: 2296 diff changeset	631 if (f->num_seekpoints) {
9d68799f945b Added basic FLAC seek implementation and added support for FLAC tracks in CUE sheets Michael Pavone <pavone@retrodev.com> parents: 2296 diff changeset	632 uint64_t best_diff;
9d68799f945b Added basic FLAC seek implementation and added support for FLAC tracks in CUE sheets Michael Pavone <pavone@retrodev.com> parents: 2296 diff changeset	633 for (uint32_t i = 0; i < f->num_seekpoints; i++)
9d68799f945b Added basic FLAC seek implementation and added support for FLAC tracks in CUE sheets Michael Pavone <pavone@retrodev.com> parents: 2296 diff changeset	634 {
9d68799f945b Added basic FLAC seek implementation and added support for FLAC tracks in CUE sheets Michael Pavone <pavone@retrodev.com> parents: 2296 diff changeset	635 if (f->seekpoints[i].sample_number > sample_number) {
9d68799f945b Added basic FLAC seek implementation and added support for FLAC tracks in CUE sheets Michael Pavone <pavone@retrodev.com> parents: 2296 diff changeset	636 continue;
9d68799f945b Added basic FLAC seek implementation and added support for FLAC tracks in CUE sheets Michael Pavone <pavone@retrodev.com> parents: 2296 diff changeset	637 }
9d68799f945b Added basic FLAC seek implementation and added support for FLAC tracks in CUE sheets Michael Pavone <pavone@retrodev.com> parents: 2296 diff changeset	638 uint64_t diff = sample_number - f->seekpoints[i].sample_number;
9d68799f945b Added basic FLAC seek implementation and added support for FLAC tracks in CUE sheets Michael Pavone <pavone@retrodev.com> parents: 2296 diff changeset	639 if (best_seekpoint > f->num_seekpoints \|\| diff < best_diff) {
9d68799f945b Added basic FLAC seek implementation and added support for FLAC tracks in CUE sheets Michael Pavone <pavone@retrodev.com> parents: 2296 diff changeset	640 best_seekpoint = i;
9d68799f945b Added basic FLAC seek implementation and added support for FLAC tracks in CUE sheets Michael Pavone <pavone@retrodev.com> parents: 2296 diff changeset	641 best_diff = diff;
9d68799f945b Added basic FLAC seek implementation and added support for FLAC tracks in CUE sheets Michael Pavone <pavone@retrodev.com> parents: 2296 diff changeset	642 }
9d68799f945b Added basic FLAC seek implementation and added support for FLAC tracks in CUE sheets Michael Pavone <pavone@retrodev.com> parents: 2296 diff changeset	643 }
9d68799f945b Added basic FLAC seek implementation and added support for FLAC tracks in CUE sheets Michael Pavone <pavone@retrodev.com> parents: 2296 diff changeset	644 }
9d68799f945b Added basic FLAC seek implementation and added support for FLAC tracks in CUE sheets Michael Pavone <pavone@retrodev.com> parents: 2296 diff changeset	645 //TODO: more efficient seeking
9d68799f945b Added basic FLAC seek implementation and added support for FLAC tracks in CUE sheets Michael Pavone <pavone@retrodev.com> parents: 2296 diff changeset	646 if (best_seekpoint > f->num_seekpoints) {
9d68799f945b Added basic FLAC seek implementation and added support for FLAC tracks in CUE sheets Michael Pavone <pavone@retrodev.com> parents: 2296 diff changeset	647 f->seek(f, f->first_frame_offset, 0);
9d68799f945b Added basic FLAC seek implementation and added support for FLAC tracks in CUE sheets Michael Pavone <pavone@retrodev.com> parents: 2296 diff changeset	648 } else if (f->seekpoints[best_seekpoint].sample_number > f->frame_start_sample \|\| f->frame_start_sample > sample_number){
9d68799f945b Added basic FLAC seek implementation and added support for FLAC tracks in CUE sheets Michael Pavone <pavone@retrodev.com> parents: 2296 diff changeset	649 f->seek(f, f->seekpoints[best_seekpoint].offset + f->first_frame_offset, 0);
9d68799f945b Added basic FLAC seek implementation and added support for FLAC tracks in CUE sheets Michael Pavone <pavone@retrodev.com> parents: 2296 diff changeset	650 }
9d68799f945b Added basic FLAC seek implementation and added support for FLAC tracks in CUE sheets Michael Pavone <pavone@retrodev.com> parents: 2296 diff changeset	651 do {
9d68799f945b Added basic FLAC seek implementation and added support for FLAC tracks in CUE sheets Michael Pavone <pavone@retrodev.com> parents: 2296 diff changeset	652 if (!decode_frame(f)) {
9d68799f945b Added basic FLAC seek implementation and added support for FLAC tracks in CUE sheets Michael Pavone <pavone@retrodev.com> parents: 2296 diff changeset	653 return;
9d68799f945b Added basic FLAC seek implementation and added support for FLAC tracks in CUE sheets Michael Pavone <pavone@retrodev.com> parents: 2296 diff changeset	654 }
9d68799f945b Added basic FLAC seek implementation and added support for FLAC tracks in CUE sheets Michael Pavone <pavone@retrodev.com> parents: 2296 diff changeset	655 } while ((f->frame_start_sample + f->frame_block_size) <= sample_number);
9d68799f945b Added basic FLAC seek implementation and added support for FLAC tracks in CUE sheets Michael Pavone <pavone@retrodev.com> parents: 2296 diff changeset	656 f->frame_sample_pos = sample_number - f->frame_start_sample;
9d68799f945b Added basic FLAC seek implementation and added support for FLAC tracks in CUE sheets Michael Pavone <pavone@retrodev.com> parents: 2296 diff changeset	657 }

Mercurial > repos > blastem

annotate flac.c @ 2496:187bc857a76a default tip