repos/blastem: flac.c annotate

annotate flac.c @ 2296:789802d99629

Add basic FLAC decoder and add FLAC playback support to the media player

author	Michael Pavone <pavone@retrodev.com>
date	Sun, 19 Feb 2023 21:12:46 -0800
parents
children	9d68799f945b

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
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	20 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	21 {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	22 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	23 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	24 return 0;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	25 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	26 return result;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	27 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	28
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	29 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	30 {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	31 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	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 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	35 {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	36 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	37 {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	38 *(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	39 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	40 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	41
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	42 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	43 {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	44 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	45 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	46 return ret;
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
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	49 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	50 {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	51 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	52 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	53 {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	54 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	55 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	56 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	57 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	58 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	59 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	60 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	61 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	62 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	63 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	64 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	65 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	66 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	67 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	68 return ret;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	69 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	70
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	71 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	72 {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	73 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	74 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	75 {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	76 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	77 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	78 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	79 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	80 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	81 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	82 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 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	84 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	85 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	86 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	87 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	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 typedef struct {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	95 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	96 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	97 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	98 } 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	99
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	100 enum {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	101 STREAMINFO,
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	102 PADDING,
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	103 APPLICATION,
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	104 SEEKTABLE,
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	105 VORBIS_COMMENT,
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	106 CUESHEET,
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	107 PICTURE
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	108 };
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	109
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	110 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	111 {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	112 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	113 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	114 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	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 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	118 {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	119 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	120 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	121 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	122 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	123 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	124 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	125 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	126 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	127 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	128 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	129
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	130 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	131 {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	132 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	133 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	134 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	135 return 0;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	136 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	137 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	138 do {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	139 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	140 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	141 parse_streaminfo(f);
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	142 } else {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	143 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	144 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	145 } while (!header.is_last);
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	146 return 1;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	147 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	148
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	149 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	150 {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	151 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	152 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	153 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	154 f->seek = seek_buffer;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	155 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	156 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	157 return f;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	158 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	159 free(f);
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	160 return NULL;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	161 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	162
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	163 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	164 {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	165 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	166 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	167 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	168 f->seek = seek_file;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	169 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	170 return f;
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 free(f);
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	173 return NULL;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	174 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	175
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	176 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	177 {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	178 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	179 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	180 return byte;
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 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	183 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	184 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	185 {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	186 mask >>= 1;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	187 length++;
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 uint64_t value = byte + (mask - 1);
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	190 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	191 {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	192 value <<= 6;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	193 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	194 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	195 return value;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	196 }
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 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	199 {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	200 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	201 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	202 return byte;
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 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	205 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	206 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	207 {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	208 mask >>= 1;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	209 length++;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	210 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	211 uint32_t value = byte + (mask - 1);
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	212 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	213 {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	214 value <<= 6;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	215 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	216 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	217 return value;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	218 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	219
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	220 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	221 {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	222 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	223 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	224 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	225 return 0;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	226 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	227 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	228 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	229 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	230 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	231 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	232 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	233 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	234 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	235 channels = 2;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	236 } else {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	237 ++channels;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	238 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	239 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	240 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	241 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	242 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	243 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	244 } 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	245 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	246 } else {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	247 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	248 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	249 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	250 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	251 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	252 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	253 } else {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	254 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	255 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	256 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	257 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	258 {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	259 case 0:
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	260 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	261 return 0;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	262 case 1:
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	263 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	264 break;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	265 case 6:
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	266 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	267 break;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	268 case 7:
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	269 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	270 break;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	271 default:
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	272 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	273 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	274 } else {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	275 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	276 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	277 break;
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_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	280 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	281 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	282 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	283 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	284 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	285 {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	286 case 15:
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	287 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	288 case 0:
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	289 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	290 break;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	291 case 1:
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	292 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	293 break;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	294 case 2:
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	295 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	296 break;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	297 case 3:
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	298 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	299 break;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	300 case 4:
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	301 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	302 break;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	303 case 5:
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	304 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	305 break;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	306 case 6:
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	307 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	308 break;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	309 case 7:
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	310 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	311 break;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	312 case 8:
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	313 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	314 break;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	315 case 9:
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	316 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	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 case 10:
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	319 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	320 break;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	321 case 11:
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	322 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	323 break;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	324 case 12:
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	325 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	326 break;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	327 case 13:
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	328 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	329 break;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	330 case 14:
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	331 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	332 break;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	333 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	334 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	335 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	336 return 1;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	337 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	338
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	339 enum {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	340 SUBFRAME_CONSTANT,
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	341 SUBFRAME_VERBATIM,
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	342 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	343 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	344 };
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	345
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	346 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	347 {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	348 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	349 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	350 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	351 return value;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	352 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	353
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	354 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	355 {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	356 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	357 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	358 return sample;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	359 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	360
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	361 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	362 {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	363 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	364 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	365 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	366 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	367 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	368 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	369 {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	370 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	371 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	372 //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	373 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	374 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	375 {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	376 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	377 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	378 {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	379 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	380 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	381 if (shift) {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	382 prediction >>= shift;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	383 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	384 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	385 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	386 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	387 } else {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	388 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	389 {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	390 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	391 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	392 {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	393 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	394 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	395 if (shift) {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	396 prediction >>= shift;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	397 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	398 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	399 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	400 {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	401 ++residual;
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 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	404 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	405 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	406 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	407 } else {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	408 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	409 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	410 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	411 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	412 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	413 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	414
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	415 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	416 {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	417 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	418 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	419 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	420 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	421 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	422 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	423 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	424 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	425 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	426 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	427 ++wasted_bits;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	428 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	429 {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	430 ++wasted_bits;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	431 }
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 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	434 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	435 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	436 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	437 sample_bits++;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	438 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	439 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	440 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	441 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	442 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	443 {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	444 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	445 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	446 } 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	447 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	448 {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	449 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	450 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	451 } 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	452 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	453 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	454 {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	455 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	456 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	457 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	458 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	459 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	460 {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	461 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	462 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	463 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	464 } 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	465 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	466 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	467 {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	468 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	469 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	470 switch (order)
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 case 1:
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	473 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	474 break;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	475 case 2:
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	476 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	477 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	478 break;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	479 case 3:
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	480 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	481 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	482 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	483 break;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	484 case 4:
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	485 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	486 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	487 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	488 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	489 break;
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 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	492 } else {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	493 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	494 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	495 }
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 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	498 {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	499 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	500 return 0;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	501 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	502 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	503 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	504 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	505 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	506 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	507 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	508 {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	509 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	510 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	511 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	512 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	513 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	514 return 1;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	515 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	516
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	517 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	518 {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	519 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	520 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	521 return 0;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	522 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	523 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	524 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	525 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	526 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	527 *(out++) = sample;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	528 *(out++) = sample;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	529 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	530 } else {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	531 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	532 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	533 {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	534 case 0:
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	535 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	536 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	537 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	538 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	539 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	540 {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	541 *(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	542 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	543 break;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	544 case 1:
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	545 //left-side
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	546 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	547 *(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	548 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	549 *(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	550 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	551 break;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	552 case 2:
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	553 //side-right
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	554 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	555 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	556 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	557 *(out++) = left;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	558 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	559 *(out++) = right;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	560 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	561 break;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	562 case 3:
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	563 //mid-side
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	564 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	565 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	566 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	567 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	568 *(out++) = left;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	569 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	570 *(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	571 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	572 break;
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 }
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	575 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	576 {
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	577 *(out++) = 0;
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 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	580
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	581 return 1;
789802d99629 Add basic FLAC decoder and add FLAC playback support to the media player Michael Pavone <pavone@retrodev.com> parents: diff changeset	582 }

Mercurial > repos > blastem

annotate flac.c @ 2296:789802d99629