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annotate render_audio.c @ 2081:cfd53c94fffb

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Initial stab at RF5C164 emulation
author Michael Pavone <pavone@retrodev.com>
date Thu, 03 Feb 2022 23:15:42 -0800
parents e4671a39d155
children 46ee354f29bd
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1 #include <limits.h>
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2 #include <string.h>
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3 #include <stdlib.h>
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4 #include <math.h>
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5 #include "render_audio.h"
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6 #include "util.h"
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7 #include "config.h"
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8 #include "blastem.h"
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9
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10 static uint8_t output_channels;
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11 static uint32_t buffer_samples, sample_rate;
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12
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13 static audio_source *audio_sources[8];
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14 static audio_source *inactive_audio_sources[8];
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15 static uint8_t num_audio_sources;
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16 static uint8_t num_inactive_audio_sources;
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17
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18 static float overall_gain_mult, *mix_buf;
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19 static int sample_size;
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20
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21 typedef void (*conv_func)(float *samples, void *vstream, int sample_count);
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22
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23 static void convert_null(float *samples, void *vstream, int sample_count)
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24 {
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25 memset(vstream, 0, sample_count * sample_size);
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26 }
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27
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28 static void convert_s16(float *samples, void *vstream, int sample_count)
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29 {
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30 int16_t *stream = vstream;
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31 for (int16_t *end = stream + sample_count; stream < end; stream++, samples++)
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32 {
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33 float sample = *samples;
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34 int16_t out_sample;
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35 if (sample >= 1.0f) {
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36 out_sample = 0x7FFF;
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37 } else if (sample <= -1.0f) {
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38 out_sample = -0x8000;
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39 } else {
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40 out_sample = sample * 0x7FFF;
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41 }
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42 *stream = out_sample;
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43 }
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44 }
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45
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46 static void clamp_f32(float *samples, void *vstream, int sample_count)
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47 {
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48 for (; sample_count > 0; sample_count--, samples++)
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49 {
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50 float sample = *samples;
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51 if (sample > 1.0f) {
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52 sample = 1.0f;
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53 } else if (sample < -1.0f) {
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54 sample = -1.0f;
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55 }
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56 *samples = sample;
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57 }
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58 }
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59
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60 static int32_t mix_f32(audio_source *audio, float *stream, int samples)
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61 {
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62 float *end = stream + samples;
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63 int16_t *src = audio->front;
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64 uint32_t i = audio->read_start;
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65 uint32_t i_end = audio->read_end;
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66 float *cur = stream;
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67 float gain_mult = audio->gain_mult * overall_gain_mult;
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68 size_t first_add = output_channels > 1 ? 1 : 0, second_add = output_channels > 1 ? output_channels - 1 : 1;
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69 if (audio->num_channels == 1) {
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70 while (cur < end && i != i_end)
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71 {
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72 *cur += gain_mult * ((float)src[i]) / 0x7FFF;
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73 cur += first_add;
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74 *cur += gain_mult * ((float)src[i++]) / 0x7FFF;
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75 cur += second_add;
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76 i &= audio->mask;
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77 }
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78 } else {
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79 while(cur < end && i != i_end)
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80 {
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81 *cur += gain_mult * ((float)src[i++]) / 0x7FFF;
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82 cur += first_add;
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83 *cur += gain_mult * ((float)src[i++]) / 0x7FFF;
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84 cur += second_add;
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85 i &= audio->mask;
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86 }
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87 }
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88 if (!render_is_audio_sync()) {
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89 audio->read_start = i;
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90 }
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91 if (cur != end) {
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92 debug_message("Underflow of %d samples, read_start: %d, read_end: %d, mask: %X\n", (int)(end-cur)/2, audio->read_start, audio->read_end, audio->mask);
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93 return (cur-end)/2;
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94 } else {
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95 return ((i_end - i) & audio->mask) / audio->num_channels;
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96 }
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97 }
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98
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99 static conv_func convert;
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100
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101
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102 int mix_and_convert(unsigned char *byte_stream, int len, int *min_remaining_out)
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103 {
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104 int samples = len / sample_size;
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105 float *mix_dest = mix_buf ? mix_buf : (float *)byte_stream;
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106 memset(mix_dest, 0, samples * sizeof(float));
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107 int min_buffered = INT_MAX;
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108 int min_remaining_buffer = INT_MAX;
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109 for (uint8_t i = 0; i < num_audio_sources; i++)
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110 {
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111 int buffered = mix_f32(audio_sources[i], mix_dest, samples);
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112 int remaining = (audio_sources[i]->mask + 1) / audio_sources[i]->num_channels - buffered;
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113 min_buffered = buffered < min_buffered ? buffered : min_buffered;
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114 min_remaining_buffer = remaining < min_remaining_buffer ? remaining : min_remaining_buffer;
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115 audio_sources[i]->front_populated = 0;
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116 render_buffer_consumed(audio_sources[i]);
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117 }
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118 convert(mix_dest, byte_stream, samples);
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119 if (min_remaining_out) {
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diff changeset
120 *min_remaining_out = min_remaining_buffer;
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diff changeset
121 }
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parents:
diff changeset
122 return min_buffered;
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parents:
diff changeset
123 }
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
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parents:
diff changeset
124
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diff changeset
125 uint8_t all_sources_ready(void)
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diff changeset
126 {
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diff changeset
127 uint8_t num_populated = 0;
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diff changeset
128 num_populated = 0;
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diff changeset
129 for (uint8_t i = 0; i < num_audio_sources; i++)
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130 {
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diff changeset
131 if (audio_sources[i]->front_populated) {
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diff changeset
132 num_populated++;
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diff changeset
133 }
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134 }
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diff changeset
135 return num_populated == num_audio_sources;
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136 }
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137
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diff changeset
138 #define BUFFER_INC_RES 0x40000000UL
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139
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diff changeset
140 void render_audio_adjust_clock(audio_source *src, uint64_t master_clock, uint64_t sample_divider)
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141 {
2081
cfd53c94fffb Initial stab at RF5C164 emulation
Michael Pavone <pavone@retrodev.com>
parents: 1870
diff changeset
142 src->buffer_inc = ((BUFFER_INC_RES * sample_divider * (uint64_t)sample_rate) / master_clock);
1865
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143 }
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144
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diff changeset
145 void render_audio_adjust_speed(float adjust_ratio)
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146 {
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diff changeset
147 for (uint8_t i = 0; i < num_audio_sources; i++)
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148 {
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149 audio_sources[i]->buffer_inc = ((double)audio_sources[i]->buffer_inc) + ((double)audio_sources[i]->buffer_inc) * adjust_ratio + 0.5;
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150 }
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151 }
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
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152
2081
cfd53c94fffb Initial stab at RF5C164 emulation
Michael Pavone <pavone@retrodev.com>
parents: 1870
diff changeset
153 audio_source *render_audio_source(const char *name, uint64_t master_clock, uint64_t sample_divider, uint8_t channels)
1865
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154 {
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diff changeset
155 audio_source *ret = NULL;
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diff changeset
156 uint32_t alloc_size = render_is_audio_sync() ? channels * buffer_samples : nearest_pow2(render_min_buffered() * 4 * channels);
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diff changeset
157 render_lock_audio();
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parents:
diff changeset
158 if (num_audio_sources < 8) {
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parents:
diff changeset
159 ret = calloc(1, sizeof(audio_source));
2081
cfd53c94fffb Initial stab at RF5C164 emulation
Michael Pavone <pavone@retrodev.com>
parents: 1870
diff changeset
160 ret->name = name;
1865
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
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diff changeset
161 ret->back = malloc(alloc_size * sizeof(int16_t));
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parents:
diff changeset
162 ret->front = render_is_audio_sync() ? malloc(alloc_size * sizeof(int16_t)) : ret->back;
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parents:
diff changeset
163 ret->front_populated = 0;
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diff changeset
164 ret->opaque = render_new_audio_opaque();
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diff changeset
165 ret->num_channels = channels;
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diff changeset
166 audio_sources[num_audio_sources++] = ret;
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parents:
diff changeset
167 }
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
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diff changeset
168 render_unlock_audio();
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diff changeset
169 if (!ret) {
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diff changeset
170 fatal_error("Too many audio sources!");
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diff changeset
171 } else {
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parents:
diff changeset
172 render_audio_adjust_clock(ret, master_clock, sample_divider);
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
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parents:
diff changeset
173 double lowpass_cutoff = get_lowpass_cutoff(config);
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parents:
diff changeset
174 double rc = (1.0 / lowpass_cutoff) / (2.0 * M_PI);
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parents:
diff changeset
175 ret->dt = 1.0 / ((double)master_clock / (double)(sample_divider));
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parents:
diff changeset
176 double alpha = ret->dt / (ret->dt + rc);
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parents:
diff changeset
177 ret->lowpass_alpha = (int32_t)(((double)0x10000) * alpha);
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parents:
diff changeset
178 ret->buffer_pos = 0;
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parents:
diff changeset
179 ret->buffer_fraction = 0;
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diff changeset
180 ret->last_left = ret->last_right = 0;
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parents:
diff changeset
181 ret->read_start = 0;
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diff changeset
182 ret->read_end = render_is_audio_sync() ? buffer_samples * channels : 0;
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parents:
diff changeset
183 ret->mask = render_is_audio_sync() ? 0xFFFFFFFF : alloc_size-1;
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parents:
diff changeset
184 ret->gain_mult = 1.0f;
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diff changeset
185 }
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diff changeset
186 render_audio_created(ret);
2081
cfd53c94fffb Initial stab at RF5C164 emulation
Michael Pavone <pavone@retrodev.com>
parents: 1870
diff changeset
187
1865
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188 return ret;
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diff changeset
189 }
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190
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
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parents:
diff changeset
191
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
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parents:
diff changeset
192 static float db_to_mult(float gain)
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
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parents:
diff changeset
193 {
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diff changeset
194 return powf(10.0f, gain/20.0f);
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parents:
diff changeset
195 }
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
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parents:
diff changeset
196
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
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parents:
diff changeset
197 void render_audio_source_gaindb(audio_source *src, float gain)
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
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parents:
diff changeset
198 {
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
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parents:
diff changeset
199 src->gain_mult = db_to_mult(gain);
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parents:
diff changeset
200 }
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
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parents:
diff changeset
201
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
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parents:
diff changeset
202 void render_pause_source(audio_source *src)
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
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parents:
diff changeset
203 {
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
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parents:
diff changeset
204 uint8_t found = 0, remaining_sources;
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
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parents:
diff changeset
205 render_lock_audio();
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
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parents:
diff changeset
206 for (uint8_t i = 0; i < num_audio_sources; i++)
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
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parents:
diff changeset
207 {
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
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parents:
diff changeset
208 if (audio_sources[i] == src) {
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
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parents:
diff changeset
209 audio_sources[i] = audio_sources[--num_audio_sources];
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parents:
diff changeset
210 found = 1;
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
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parents:
diff changeset
211 remaining_sources = num_audio_sources;
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
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parents:
diff changeset
212 break;
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
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parents:
diff changeset
213 }
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
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parents:
diff changeset
214 }
2081
cfd53c94fffb Initial stab at RF5C164 emulation
Michael Pavone <pavone@retrodev.com>
parents: 1870
diff changeset
215
1865
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
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parents:
diff changeset
216 render_unlock_audio();
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
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parents:
diff changeset
217 if (found) {
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
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parents:
diff changeset
218 render_source_paused(src, remaining_sources);
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
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parents:
diff changeset
219 }
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
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parents:
diff changeset
220 inactive_audio_sources[num_inactive_audio_sources++] = src;
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
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parents:
diff changeset
221 }
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
222
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
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parents:
diff changeset
223 void render_resume_source(audio_source *src)
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
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parents:
diff changeset
224 {
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
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parents:
diff changeset
225 render_lock_audio();
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
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parents:
diff changeset
226 if (num_audio_sources < 8) {
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
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parents:
diff changeset
227 audio_sources[num_audio_sources++] = src;
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
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parents:
diff changeset
228 }
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
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parents:
diff changeset
229 render_unlock_audio();
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
230 for (uint8_t i = 0; i < num_inactive_audio_sources; i++)
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
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parents:
diff changeset
231 {
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
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parents:
diff changeset
232 if (inactive_audio_sources[i] == src) {
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
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parents:
diff changeset
233 inactive_audio_sources[i] = inactive_audio_sources[--num_inactive_audio_sources];
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
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parents:
diff changeset
234 }
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
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parents:
diff changeset
235 }
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
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parents:
diff changeset
236 render_source_resumed(src);
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
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parents:
diff changeset
237 }
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
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parents:
diff changeset
238
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
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parents:
diff changeset
239 void render_free_source(audio_source *src)
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
240 {
1870
e4671a39d155 Properly handle freeing a paused audio source. Fixes crash when repeatedly reloading a ROM or loading a sequence of different ROMs
Michael Pavone <pavone@retrodev.com>
parents: 1865
diff changeset
241 uint8_t found = 0;
e4671a39d155 Properly handle freeing a paused audio source. Fixes crash when repeatedly reloading a ROM or loading a sequence of different ROMs
Michael Pavone <pavone@retrodev.com>
parents: 1865
diff changeset
242 for (uint8_t i = 0; i < num_inactive_audio_sources; i++)
e4671a39d155 Properly handle freeing a paused audio source. Fixes crash when repeatedly reloading a ROM or loading a sequence of different ROMs
Michael Pavone <pavone@retrodev.com>
parents: 1865
diff changeset
243 {
e4671a39d155 Properly handle freeing a paused audio source. Fixes crash when repeatedly reloading a ROM or loading a sequence of different ROMs
Michael Pavone <pavone@retrodev.com>
parents: 1865
diff changeset
244 if (inactive_audio_sources[i] == src) {
e4671a39d155 Properly handle freeing a paused audio source. Fixes crash when repeatedly reloading a ROM or loading a sequence of different ROMs
Michael Pavone <pavone@retrodev.com>
parents: 1865
diff changeset
245 inactive_audio_sources[i] = inactive_audio_sources[--num_inactive_audio_sources];
e4671a39d155 Properly handle freeing a paused audio source. Fixes crash when repeatedly reloading a ROM or loading a sequence of different ROMs
Michael Pavone <pavone@retrodev.com>
parents: 1865
diff changeset
246 found = 1;
e4671a39d155 Properly handle freeing a paused audio source. Fixes crash when repeatedly reloading a ROM or loading a sequence of different ROMs
Michael Pavone <pavone@retrodev.com>
parents: 1865
diff changeset
247 break;
e4671a39d155 Properly handle freeing a paused audio source. Fixes crash when repeatedly reloading a ROM or loading a sequence of different ROMs
Michael Pavone <pavone@retrodev.com>
parents: 1865
diff changeset
248 }
e4671a39d155 Properly handle freeing a paused audio source. Fixes crash when repeatedly reloading a ROM or loading a sequence of different ROMs
Michael Pavone <pavone@retrodev.com>
parents: 1865
diff changeset
249 }
e4671a39d155 Properly handle freeing a paused audio source. Fixes crash when repeatedly reloading a ROM or loading a sequence of different ROMs
Michael Pavone <pavone@retrodev.com>
parents: 1865
diff changeset
250 if (!found) {
e4671a39d155 Properly handle freeing a paused audio source. Fixes crash when repeatedly reloading a ROM or loading a sequence of different ROMs
Michael Pavone <pavone@retrodev.com>
parents: 1865
diff changeset
251 render_pause_source(src);
e4671a39d155 Properly handle freeing a paused audio source. Fixes crash when repeatedly reloading a ROM or loading a sequence of different ROMs
Michael Pavone <pavone@retrodev.com>
parents: 1865
diff changeset
252 num_inactive_audio_sources--;
e4671a39d155 Properly handle freeing a paused audio source. Fixes crash when repeatedly reloading a ROM or loading a sequence of different ROMs
Michael Pavone <pavone@retrodev.com>
parents: 1865
diff changeset
253 }
2081
cfd53c94fffb Initial stab at RF5C164 emulation
Michael Pavone <pavone@retrodev.com>
parents: 1870
diff changeset
254
1865
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
255 free(src->front);
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
256 if (render_is_audio_sync()) {
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
257 free(src->back);
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
258 render_free_audio_opaque(src->opaque);
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
259 }
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
260 free(src);
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
261 }
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
262
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
263 static int16_t lowpass_sample(audio_source *src, int16_t last, int16_t current)
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
264 {
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
265 int32_t tmp = current * src->lowpass_alpha + last * (0x10000 - src->lowpass_alpha);
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
266 current = tmp >> 16;
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
267 return current;
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
268 }
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
269
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
270 static void interp_sample(audio_source *src, int16_t last, int16_t current)
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
271 {
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
272 int64_t tmp = last * ((src->buffer_fraction << 16) / src->buffer_inc);
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
273 tmp += current * (0x10000 - ((src->buffer_fraction << 16) / src->buffer_inc));
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
274 src->back[src->buffer_pos++] = tmp >> 16;
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
275 }
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
276
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
277 static uint32_t sync_samples;
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
278 void render_put_mono_sample(audio_source *src, int16_t value)
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
279 {
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
280 value = lowpass_sample(src, src->last_left, value);
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
281 src->buffer_fraction += src->buffer_inc;
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
282 uint32_t base = render_is_audio_sync() ? 0 : src->read_end;
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
283 while (src->buffer_fraction > BUFFER_INC_RES)
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
284 {
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
285 src->buffer_fraction -= BUFFER_INC_RES;
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
286 interp_sample(src, src->last_left, value);
2081
cfd53c94fffb Initial stab at RF5C164 emulation
Michael Pavone <pavone@retrodev.com>
parents: 1870
diff changeset
287
1865
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
288 if (((src->buffer_pos - base) & src->mask) >= sync_samples) {
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
289 render_do_audio_ready(src);
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
290 }
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
291 src->buffer_pos &= src->mask;
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
292 }
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
293 src->last_left = value;
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
294 }
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
295
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
296 void render_put_stereo_sample(audio_source *src, int16_t left, int16_t right)
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
297 {
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
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parents:
diff changeset
298 left = lowpass_sample(src, src->last_left, left);
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
299 right = lowpass_sample(src, src->last_right, right);
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
300 src->buffer_fraction += src->buffer_inc;
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
301 uint32_t base = render_is_audio_sync() ? 0 : src->read_end;
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
302 while (src->buffer_fraction > BUFFER_INC_RES)
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
303 {
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
304 src->buffer_fraction -= BUFFER_INC_RES;
2081
cfd53c94fffb Initial stab at RF5C164 emulation
Michael Pavone <pavone@retrodev.com>
parents: 1870
diff changeset
305
1865
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
306 interp_sample(src, src->last_left, left);
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
307 interp_sample(src, src->last_right, right);
2081
cfd53c94fffb Initial stab at RF5C164 emulation
Michael Pavone <pavone@retrodev.com>
parents: 1870
diff changeset
308
1865
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
309 if (((src->buffer_pos - base) & src->mask)/2 >= sync_samples) {
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
310 render_do_audio_ready(src);
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
311 }
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
312 src->buffer_pos &= src->mask;
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
313 }
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
314 src->last_left = left;
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
315 src->last_right = right;
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
316 }
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
317
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
318 static void update_source(audio_source *src, double rc, uint8_t sync_changed)
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
319 {
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
320 double alpha = src->dt / (src->dt + rc);
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
321 int32_t lowpass_alpha = (int32_t)(((double)0x10000) * alpha);
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
322 src->lowpass_alpha = lowpass_alpha;
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
323 if (sync_changed) {
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
324 uint32_t alloc_size = render_is_audio_sync() ? src->num_channels * buffer_samples : nearest_pow2(render_min_buffered() * 4 * src->num_channels);
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
325 src->back = realloc(src->back, alloc_size * sizeof(int16_t));
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
326 if (render_is_audio_sync()) {
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
327 src->front = malloc(alloc_size * sizeof(int16_t));
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
328 } else {
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
329 free(src->front);
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
330 src->front = src->back;
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
331 }
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
332 src->mask = render_is_audio_sync() ? 0xFFFFFFFF : alloc_size-1;
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
333 src->read_start = 0;
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
334 src->read_end = render_is_audio_sync() ? buffer_samples * src->num_channels : 0;
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
335 src->buffer_pos = 0;
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
336 }
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
337 }
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
338
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
339 uint8_t old_audio_sync;
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
340 void render_audio_initialized(render_audio_format format, uint32_t rate, uint8_t channels, uint32_t buffer_size, int sample_size_in)
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
341 {
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
342 sample_rate = rate;
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
343 output_channels = channels;
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
344 buffer_samples = buffer_size;
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
345 sample_size = sample_size_in;
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
346 if (mix_buf) {
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
347 free(mix_buf);
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
348 mix_buf = NULL;
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
349 }
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
350 switch(format)
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
351 {
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
352 case RENDER_AUDIO_S16:
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
353 convert = convert_s16;
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
354 mix_buf = calloc(output_channels * buffer_samples, sizeof(float));
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
355 break;
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
356 case RENDER_AUDIO_FLOAT:
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
357 convert = clamp_f32;
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
358 break;
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
359 case RENDER_AUDIO_UNKNOWN:
4c322abd9fa5 Split generic part of audio code into a separate file so it can be used in other targets besides SDL
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
360 convert = convert_null;
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361 mix_buf = calloc(output_channels * buffer_samples, sizeof(float));
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362 break;
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363 }
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364 uint32_t syncs = render_audio_syncs_per_sec();
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365 if (syncs) {
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366 sync_samples = rate / syncs;
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367 } else {
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368 sync_samples = buffer_samples;
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369 }
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370 char * gain_str = tern_find_path(config, "audio\0gain\0", TVAL_PTR).ptrval;
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371 overall_gain_mult = db_to_mult(gain_str ? atof(gain_str) : 0.0f);
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372 uint8_t sync_changed = old_audio_sync != render_is_audio_sync();
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373 old_audio_sync = render_is_audio_sync();
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374 double lowpass_cutoff = get_lowpass_cutoff(config);
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375 double rc = (1.0 / lowpass_cutoff) / (2.0 * M_PI);
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376 render_lock_audio();
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377 for (uint8_t i = 0; i < num_audio_sources; i++)
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378 {
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379 update_source(audio_sources[i], rc, sync_changed);
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380 }
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381 render_unlock_audio();
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382 for (uint8_t i = 0; i < num_inactive_audio_sources; i++)
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383 {
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384 update_source(inactive_audio_sources[i], rc, sync_changed);
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385 }
2081
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386 }