| 1 | /* Copyright (C) 2010-2020 The RetroArch team |
| 2 | * |
| 3 | * --------------------------------------------------------------------------------------- |
| 4 | * The following license statement only applies to this file (audio_mix.c). |
| 5 | * --------------------------------------------------------------------------------------- |
| 6 | * |
| 7 | * Permission is hereby granted, free of charge, |
| 8 | * to any person obtaining a copy of this software and associated documentation files (the "Software"), |
| 9 | * to deal in the Software without restriction, including without limitation the rights to |
| 10 | * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, |
| 11 | * and to permit persons to whom the Software is furnished to do so, subject to the following conditions: |
| 12 | * |
| 13 | * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. |
| 14 | * |
| 15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, |
| 16 | * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 17 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. |
| 18 | * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, |
| 19 | * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| 20 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
| 21 | */ |
| 22 | |
| 23 | #include <stdlib.h> |
| 24 | #include <string.h> |
| 25 | #include <memalign.h> |
| 26 | |
| 27 | #include <retro_environment.h> |
| 28 | |
| 29 | #if defined(__SSE2__) |
| 30 | #include <emmintrin.h> |
| 31 | #elif defined(__ALTIVEC__) |
| 32 | #include <altivec.h> |
| 33 | #endif |
| 34 | |
| 35 | #include <retro_miscellaneous.h> |
| 36 | #include <audio/audio_mix.h> |
| 37 | #include <streams/file_stream.h> |
| 38 | #include <audio/conversion/float_to_s16.h> |
| 39 | #include <audio/conversion/s16_to_float.h> |
| 40 | |
| 41 | void audio_mix_volume_C(float *out, const float *in, float vol, size_t samples) |
| 42 | { |
| 43 | size_t i; |
| 44 | for (i = 0; i < samples; i++) |
| 45 | out[i] += in[i] * vol; |
| 46 | } |
| 47 | |
| 48 | #ifdef __SSE2__ |
| 49 | void audio_mix_volume_SSE2(float *out, const float *in, float vol, size_t samples) |
| 50 | { |
| 51 | size_t i, remaining_samples; |
| 52 | __m128 volume = _mm_set1_ps(vol); |
| 53 | |
| 54 | for (i = 0; i + 16 <= samples; i += 16, out += 16, in += 16) |
| 55 | { |
| 56 | unsigned j; |
| 57 | __m128 input[4]; |
| 58 | __m128 additive[4]; |
| 59 | |
| 60 | input[0] = _mm_loadu_ps(out + 0); |
| 61 | input[1] = _mm_loadu_ps(out + 4); |
| 62 | input[2] = _mm_loadu_ps(out + 8); |
| 63 | input[3] = _mm_loadu_ps(out + 12); |
| 64 | |
| 65 | additive[0] = _mm_mul_ps(volume, _mm_loadu_ps(in + 0)); |
| 66 | additive[1] = _mm_mul_ps(volume, _mm_loadu_ps(in + 4)); |
| 67 | additive[2] = _mm_mul_ps(volume, _mm_loadu_ps(in + 8)); |
| 68 | additive[3] = _mm_mul_ps(volume, _mm_loadu_ps(in + 12)); |
| 69 | |
| 70 | for (j = 0; j < 4; j++) |
| 71 | _mm_storeu_ps(out + 4 * j, _mm_add_ps(input[j], additive[j])); |
| 72 | } |
| 73 | |
| 74 | remaining_samples = samples - i; |
| 75 | |
| 76 | for (i = 0; i < remaining_samples; i++) |
| 77 | out[i] += in[i] * vol; |
| 78 | } |
| 79 | #endif |
| 80 | |
| 81 | void audio_mix_free_chunk(audio_chunk_t *chunk) |
| 82 | { |
| 83 | if (!chunk) |
| 84 | return; |
| 85 | |
| 86 | #ifdef HAVE_RWAV |
| 87 | if (chunk->rwav && chunk->rwav->samples) |
| 88 | { |
| 89 | /* rwav_free only frees the samples */ |
| 90 | rwav_free(chunk->rwav); |
| 91 | free(chunk->rwav); |
| 92 | } |
| 93 | #endif |
| 94 | |
| 95 | if (chunk->buf) |
| 96 | free(chunk->buf); |
| 97 | |
| 98 | if (chunk->upsample_buf) |
| 99 | memalign_free(chunk->upsample_buf); |
| 100 | |
| 101 | if (chunk->float_buf) |
| 102 | memalign_free(chunk->float_buf); |
| 103 | |
| 104 | if (chunk->float_resample_buf) |
| 105 | memalign_free(chunk->float_resample_buf); |
| 106 | |
| 107 | if (chunk->resample_buf) |
| 108 | memalign_free(chunk->resample_buf); |
| 109 | |
| 110 | if (chunk->resampler && chunk->resampler_data) |
| 111 | chunk->resampler->free(chunk->resampler_data); |
| 112 | |
| 113 | free(chunk); |
| 114 | } |
| 115 | |
| 116 | audio_chunk_t* audio_mix_load_wav_file(const char *path, int sample_rate, |
| 117 | const char *resampler_ident, enum resampler_quality quality) |
| 118 | { |
| 119 | #ifdef HAVE_RWAV |
| 120 | int sample_size; |
| 121 | int64_t len = 0; |
| 122 | void *buf = NULL; |
| 123 | audio_chunk_t *chunk = (audio_chunk_t*)malloc(sizeof(*chunk)); |
| 124 | |
| 125 | if (!chunk) |
| 126 | return NULL; |
| 127 | |
| 128 | chunk->buf = NULL; |
| 129 | chunk->upsample_buf = NULL; |
| 130 | chunk->float_buf = NULL; |
| 131 | chunk->float_resample_buf = NULL; |
| 132 | chunk->resample_buf = NULL; |
| 133 | chunk->len = 0; |
| 134 | chunk->resample_len = 0; |
| 135 | chunk->sample_rate = sample_rate; |
| 136 | chunk->resample = false; |
| 137 | chunk->resampler = NULL; |
| 138 | chunk->resampler_data = NULL; |
| 139 | chunk->ratio = 0.00f; |
| 140 | chunk->rwav = (rwav_t*)malloc(sizeof(rwav_t)); |
| 141 | |
| 142 | if (!chunk->rwav) |
| 143 | goto error; |
| 144 | |
| 145 | chunk->rwav->bitspersample = 0; |
| 146 | chunk->rwav->numchannels = 0; |
| 147 | chunk->rwav->samplerate = 0; |
| 148 | chunk->rwav->numsamples = 0; |
| 149 | chunk->rwav->subchunk2size = 0; |
| 150 | chunk->rwav->samples = NULL; |
| 151 | |
| 152 | if (!filestream_read_file(path, &buf, &len)) |
| 153 | goto error; |
| 154 | |
| 155 | chunk->buf = buf; |
| 156 | chunk->len = len; |
| 157 | |
| 158 | if (rwav_load(chunk->rwav, chunk->buf, chunk->len) == RWAV_ITERATE_ERROR) |
| 159 | goto error; |
| 160 | |
| 161 | /* numsamples does not know or care about |
| 162 | * multiple channels, but we need space for 2 */ |
| 163 | chunk->upsample_buf = (int16_t*)memalign_alloc(128, |
| 164 | chunk->rwav->numsamples * 2 * sizeof(int16_t)); |
| 165 | |
| 166 | sample_size = chunk->rwav->bitspersample / 8; |
| 167 | |
| 168 | if (sample_size == 1) |
| 169 | { |
| 170 | unsigned i; |
| 171 | |
| 172 | if (chunk->rwav->numchannels == 1) |
| 173 | { |
| 174 | for (i = 0; i < chunk->rwav->numsamples; i++) |
| 175 | { |
| 176 | uint8_t *sample = ( |
| 177 | (uint8_t*)chunk->rwav->samples) + i; |
| 178 | |
| 179 | chunk->upsample_buf[i * 2] = |
| 180 | (int16_t)((sample[0] - 128) << 8); |
| 181 | chunk->upsample_buf[(i * 2) + 1] = |
| 182 | (int16_t)((sample[0] - 128) << 8); |
| 183 | } |
| 184 | } |
| 185 | else if (chunk->rwav->numchannels == 2) |
| 186 | { |
| 187 | for (i = 0; i < chunk->rwav->numsamples; i++) |
| 188 | { |
| 189 | uint8_t *sample = ( |
| 190 | (uint8_t*)chunk->rwav->samples) + |
| 191 | (i * 2); |
| 192 | |
| 193 | chunk->upsample_buf[i * 2] = |
| 194 | (int16_t)((sample[0] - 128) << 8); |
| 195 | chunk->upsample_buf[(i * 2) + 1] = |
| 196 | (int16_t)((sample[1] - 128) << 8); |
| 197 | } |
| 198 | } |
| 199 | } |
| 200 | else if (sample_size == 2) |
| 201 | { |
| 202 | if (chunk->rwav->numchannels == 1) |
| 203 | { |
| 204 | unsigned i; |
| 205 | |
| 206 | for (i = 0; i < chunk->rwav->numsamples; i++) |
| 207 | { |
| 208 | int16_t sample = ((int16_t*) |
| 209 | chunk->rwav->samples)[i]; |
| 210 | |
| 211 | chunk->upsample_buf[i * 2] = sample; |
| 212 | chunk->upsample_buf[(i * 2) + 1] = sample; |
| 213 | } |
| 214 | } |
| 215 | else if (chunk->rwav->numchannels == 2) |
| 216 | memcpy(chunk->upsample_buf, chunk->rwav->samples, |
| 217 | chunk->rwav->subchunk2size); |
| 218 | } |
| 219 | else if (sample_size != 2) |
| 220 | { |
| 221 | /* we don't support any other sample size besides 8 and 16-bit yet */ |
| 222 | goto error; |
| 223 | } |
| 224 | |
| 225 | if (sample_rate != (int)chunk->rwav->samplerate) |
| 226 | { |
| 227 | chunk->resample = true; |
| 228 | chunk->ratio = (double)sample_rate / chunk->rwav->samplerate; |
| 229 | |
| 230 | retro_resampler_realloc(&chunk->resampler_data, |
| 231 | &chunk->resampler, |
| 232 | resampler_ident, |
| 233 | quality, |
| 234 | chunk->ratio); |
| 235 | |
| 236 | if (chunk->resampler && chunk->resampler_data) |
| 237 | { |
| 238 | struct resampler_data info; |
| 239 | |
| 240 | chunk->float_buf = (float*)memalign_alloc(128, |
| 241 | chunk->rwav->numsamples * 2 * |
| 242 | chunk->ratio * sizeof(float)); |
| 243 | |
| 244 | /* why is *3 needed instead of just *2? Does the |
| 245 | * sinc driver require more space than we know about? */ |
| 246 | chunk->float_resample_buf = (float*)memalign_alloc(128, |
| 247 | chunk->rwav->numsamples * 3 * |
| 248 | chunk->ratio * sizeof(float)); |
| 249 | |
| 250 | convert_s16_to_float(chunk->float_buf, |
| 251 | chunk->upsample_buf, chunk->rwav->numsamples * 2, 1.0); |
| 252 | |
| 253 | info.data_in = (const float*)chunk->float_buf; |
| 254 | info.data_out = chunk->float_resample_buf; |
| 255 | /* a 'frame' consists of two channels, so we set this |
| 256 | * to the number of samples irrespective of channel count */ |
| 257 | info.input_frames = chunk->rwav->numsamples; |
| 258 | info.output_frames = 0; |
| 259 | info.ratio = chunk->ratio; |
| 260 | |
| 261 | chunk->resampler->process(chunk->resampler_data, &info); |
| 262 | |
| 263 | /* number of output_frames does not increase with |
| 264 | * multiple channels, but assume we need space for 2 */ |
| 265 | chunk->resample_buf = (int16_t*)memalign_alloc(128, |
| 266 | info.output_frames * 2 * sizeof(int16_t)); |
| 267 | chunk->resample_len = info.output_frames; |
| 268 | convert_float_to_s16(chunk->resample_buf, |
| 269 | chunk->float_resample_buf, info.output_frames * 2); |
| 270 | } |
| 271 | } |
| 272 | |
| 273 | return chunk; |
| 274 | |
| 275 | error: |
| 276 | audio_mix_free_chunk(chunk); |
| 277 | #endif |
| 278 | return NULL; |
| 279 | } |
| 280 | |
| 281 | size_t audio_mix_get_chunk_num_samples(audio_chunk_t *chunk) |
| 282 | { |
| 283 | if (!chunk) |
| 284 | return 0; |
| 285 | |
| 286 | #ifdef HAVE_RWAV |
| 287 | if (chunk->rwav) |
| 288 | { |
| 289 | if (chunk->resample) |
| 290 | return chunk->resample_len; |
| 291 | return chunk->rwav->numsamples; |
| 292 | } |
| 293 | #endif |
| 294 | |
| 295 | /* no other filetypes supported yet */ |
| 296 | return 0; |
| 297 | } |
| 298 | |
| 299 | /** |
| 300 | * audio_mix_get_chunk_sample: |
| 301 | * @chunk : audio chunk instance |
| 302 | * @channel : channel of the sample (0=left, 1=right) |
| 303 | * @index : index of the sample |
| 304 | * |
| 305 | * Get a sample from an audio chunk. |
| 306 | * |
| 307 | * Returns: A signed 16-bit audio sample. |
| 308 | **/ |
| 309 | int16_t audio_mix_get_chunk_sample(audio_chunk_t *chunk, |
| 310 | unsigned channel, size_t index) |
| 311 | { |
| 312 | if (!chunk) |
| 313 | return 0; |
| 314 | |
| 315 | #ifdef HAVE_RWAV |
| 316 | if (chunk->rwav) |
| 317 | { |
| 318 | int sample_size = chunk->rwav->bitspersample / 8; |
| 319 | int16_t sample_out = 0; |
| 320 | |
| 321 | /* 0 is the first/left channel */ |
| 322 | uint8_t *sample = NULL; |
| 323 | |
| 324 | if (chunk->resample) |
| 325 | sample = (uint8_t*)chunk->resample_buf + |
| 326 | (sample_size * index * chunk->rwav->numchannels) |
| 327 | + (channel * sample_size); |
| 328 | else |
| 329 | sample = (uint8_t*)chunk->upsample_buf + |
| 330 | (sample_size * index * chunk->rwav->numchannels) |
| 331 | + (channel * sample_size); |
| 332 | |
| 333 | sample_out = (int16_t)*sample; |
| 334 | |
| 335 | return sample_out; |
| 336 | } |
| 337 | #endif |
| 338 | |
| 339 | /* no other filetypes supported yet */ |
| 340 | return 0; |
| 341 | } |
| 342 | |
| 343 | int16_t* audio_mix_get_chunk_samples(audio_chunk_t *chunk) |
| 344 | { |
| 345 | if (!chunk) |
| 346 | return 0; |
| 347 | |
| 348 | #ifdef HAVE_RWAV |
| 349 | if (chunk->rwav) |
| 350 | { |
| 351 | int16_t *sample; |
| 352 | |
| 353 | if (chunk->resample) |
| 354 | sample = chunk->resample_buf; |
| 355 | else |
| 356 | sample = chunk->upsample_buf; |
| 357 | |
| 358 | return sample; |
| 359 | } |
| 360 | #endif |
| 361 | |
| 362 | return NULL; |
| 363 | } |
| 364 | |
| 365 | int audio_mix_get_chunk_num_channels(audio_chunk_t *chunk) |
| 366 | { |
| 367 | if (!chunk) |
| 368 | return 0; |
| 369 | |
| 370 | #ifdef HAVE_RWAV |
| 371 | if (chunk->rwav) |
| 372 | return chunk->rwav->numchannels; |
| 373 | #endif |
| 374 | |
| 375 | /* don't support other formats yet */ |
| 376 | return 0; |
| 377 | } |