| 1 | /* |
| 2 | * Copyright (c) 2012 Justin Ruggles <justin.ruggles@gmail.com> |
| 3 | * |
| 4 | * This file is part of FFmpeg. |
| 5 | * |
| 6 | * FFmpeg is free software; you can redistribute it and/or |
| 7 | * modify it under the terms of the GNU Lesser General Public |
| 8 | * License as published by the Free Software Foundation; either |
| 9 | * version 2.1 of the License, or (at your option) any later version. |
| 10 | * |
| 11 | * FFmpeg is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 14 | * Lesser General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU Lesser General Public |
| 17 | * License along with FFmpeg; if not, write to the Free Software |
| 18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 19 | */ |
| 20 | |
| 21 | #include "libavutil/common.h" |
| 22 | #include "libavutil/dict.h" |
| 23 | // #include "libavutil/error.h" |
| 24 | #include "libavutil/frame.h" |
| 25 | #include "libavutil/log.h" |
| 26 | #include "libavutil/mem.h" |
| 27 | #include "libavutil/opt.h" |
| 28 | |
| 29 | #include "avresample.h" |
| 30 | #include "internal.h" |
| 31 | #include "audio_data.h" |
| 32 | #include "audio_convert.h" |
| 33 | #include "audio_mix.h" |
| 34 | #include "resample.h" |
| 35 | |
| 36 | int avresample_open(AVAudioResampleContext *avr) |
| 37 | { |
| 38 | int ret; |
| 39 | |
| 40 | if (avresample_is_open(avr)) { |
| 41 | av_log(avr, AV_LOG_ERROR, "The resampling context is already open.\n"); |
| 42 | return AVERROR(EINVAL); |
| 43 | } |
| 44 | |
| 45 | /* set channel mixing parameters */ |
| 46 | avr->in_channels = av_get_channel_layout_nb_channels(avr->in_channel_layout); |
| 47 | if (avr->in_channels <= 0 || avr->in_channels > AVRESAMPLE_MAX_CHANNELS) { |
| 48 | av_log(avr, AV_LOG_ERROR, "Invalid input channel layout: %"PRIu64"\n", |
| 49 | avr->in_channel_layout); |
| 50 | return AVERROR(EINVAL); |
| 51 | } |
| 52 | avr->out_channels = av_get_channel_layout_nb_channels(avr->out_channel_layout); |
| 53 | if (avr->out_channels <= 0 || avr->out_channels > AVRESAMPLE_MAX_CHANNELS) { |
| 54 | av_log(avr, AV_LOG_ERROR, "Invalid output channel layout: %"PRIu64"\n", |
| 55 | avr->out_channel_layout); |
| 56 | return AVERROR(EINVAL); |
| 57 | } |
| 58 | avr->resample_channels = FFMIN(avr->in_channels, avr->out_channels); |
| 59 | avr->downmix_needed = avr->in_channels > avr->out_channels; |
| 60 | avr->upmix_needed = avr->out_channels > avr->in_channels || |
| 61 | (!avr->downmix_needed && (avr->mix_matrix || |
| 62 | avr->in_channel_layout != avr->out_channel_layout)); |
| 63 | avr->mixing_needed = avr->downmix_needed || avr->upmix_needed; |
| 64 | |
| 65 | /* set resampling parameters */ |
| 66 | avr->resample_needed = avr->in_sample_rate != avr->out_sample_rate || |
| 67 | avr->force_resampling; |
| 68 | |
| 69 | /* select internal sample format if not specified by the user */ |
| 70 | if (avr->internal_sample_fmt == AV_SAMPLE_FMT_NONE && |
| 71 | (avr->mixing_needed || avr->resample_needed)) { |
| 72 | enum AVSampleFormat in_fmt = av_get_planar_sample_fmt(avr->in_sample_fmt); |
| 73 | enum AVSampleFormat out_fmt = av_get_planar_sample_fmt(avr->out_sample_fmt); |
| 74 | int max_bps = FFMAX(av_get_bytes_per_sample(in_fmt), |
| 75 | av_get_bytes_per_sample(out_fmt)); |
| 76 | if (max_bps <= 2) { |
| 77 | avr->internal_sample_fmt = AV_SAMPLE_FMT_S16P; |
| 78 | } else if (avr->mixing_needed) { |
| 79 | avr->internal_sample_fmt = AV_SAMPLE_FMT_FLTP; |
| 80 | } else { |
| 81 | if (max_bps <= 4) { |
| 82 | if (in_fmt == AV_SAMPLE_FMT_S32P || |
| 83 | out_fmt == AV_SAMPLE_FMT_S32P) { |
| 84 | if (in_fmt == AV_SAMPLE_FMT_FLTP || |
| 85 | out_fmt == AV_SAMPLE_FMT_FLTP) { |
| 86 | /* if one is s32 and the other is flt, use dbl */ |
| 87 | avr->internal_sample_fmt = AV_SAMPLE_FMT_DBLP; |
| 88 | } else { |
| 89 | /* if one is s32 and the other is s32, s16, or u8, use s32 */ |
| 90 | avr->internal_sample_fmt = AV_SAMPLE_FMT_S32P; |
| 91 | } |
| 92 | } else { |
| 93 | /* if one is flt and the other is flt, s16 or u8, use flt */ |
| 94 | avr->internal_sample_fmt = AV_SAMPLE_FMT_FLTP; |
| 95 | } |
| 96 | } else { |
| 97 | /* if either is dbl, use dbl */ |
| 98 | avr->internal_sample_fmt = AV_SAMPLE_FMT_DBLP; |
| 99 | } |
| 100 | } |
| 101 | av_log(avr, AV_LOG_DEBUG, "Using %s as internal sample format\n", |
| 102 | av_get_sample_fmt_name(avr->internal_sample_fmt)); |
| 103 | } |
| 104 | |
| 105 | /* we may need to add an extra conversion in order to remap channels if |
| 106 | the output format is not planar */ |
| 107 | if (avr->use_channel_map && !avr->mixing_needed && !avr->resample_needed && |
| 108 | !ff_sample_fmt_is_planar(avr->out_sample_fmt, avr->out_channels)) { |
| 109 | avr->internal_sample_fmt = av_get_planar_sample_fmt(avr->out_sample_fmt); |
| 110 | } |
| 111 | |
| 112 | /* set sample format conversion parameters */ |
| 113 | if (avr->resample_needed || avr->mixing_needed) |
| 114 | avr->in_convert_needed = avr->in_sample_fmt != avr->internal_sample_fmt; |
| 115 | else |
| 116 | avr->in_convert_needed = avr->use_channel_map && |
| 117 | !ff_sample_fmt_is_planar(avr->out_sample_fmt, avr->out_channels); |
| 118 | |
| 119 | if (avr->resample_needed || avr->mixing_needed || avr->in_convert_needed) |
| 120 | avr->out_convert_needed = avr->internal_sample_fmt != avr->out_sample_fmt; |
| 121 | else |
| 122 | avr->out_convert_needed = avr->in_sample_fmt != avr->out_sample_fmt; |
| 123 | |
| 124 | avr->in_copy_needed = !avr->in_convert_needed && (avr->mixing_needed || |
| 125 | (avr->use_channel_map && avr->resample_needed)); |
| 126 | |
| 127 | if (avr->use_channel_map) { |
| 128 | if (avr->in_copy_needed) { |
| 129 | avr->remap_point = REMAP_IN_COPY; |
| 130 | av_dlog(avr, "remap channels during in_copy\n"); |
| 131 | } else if (avr->in_convert_needed) { |
| 132 | avr->remap_point = REMAP_IN_CONVERT; |
| 133 | av_dlog(avr, "remap channels during in_convert\n"); |
| 134 | } else if (avr->out_convert_needed) { |
| 135 | avr->remap_point = REMAP_OUT_CONVERT; |
| 136 | av_dlog(avr, "remap channels during out_convert\n"); |
| 137 | } else { |
| 138 | avr->remap_point = REMAP_OUT_COPY; |
| 139 | av_dlog(avr, "remap channels during out_copy\n"); |
| 140 | } |
| 141 | |
| 142 | #ifdef DEBUG |
| 143 | { |
| 144 | int ch; |
| 145 | av_dlog(avr, "output map: "); |
| 146 | if (avr->ch_map_info.do_remap) |
| 147 | for (ch = 0; ch < avr->in_channels; ch++) |
| 148 | av_dlog(avr, " % 2d", avr->ch_map_info.channel_map[ch]); |
| 149 | else |
| 150 | av_dlog(avr, "n/a"); |
| 151 | av_dlog(avr, "\n"); |
| 152 | av_dlog(avr, "copy map: "); |
| 153 | if (avr->ch_map_info.do_copy) |
| 154 | for (ch = 0; ch < avr->in_channels; ch++) |
| 155 | av_dlog(avr, " % 2d", avr->ch_map_info.channel_copy[ch]); |
| 156 | else |
| 157 | av_dlog(avr, "n/a"); |
| 158 | av_dlog(avr, "\n"); |
| 159 | av_dlog(avr, "zero map: "); |
| 160 | if (avr->ch_map_info.do_zero) |
| 161 | for (ch = 0; ch < avr->in_channels; ch++) |
| 162 | av_dlog(avr, " % 2d", avr->ch_map_info.channel_zero[ch]); |
| 163 | else |
| 164 | av_dlog(avr, "n/a"); |
| 165 | av_dlog(avr, "\n"); |
| 166 | av_dlog(avr, "input map: "); |
| 167 | for (ch = 0; ch < avr->in_channels; ch++) |
| 168 | av_dlog(avr, " % 2d", avr->ch_map_info.input_map[ch]); |
| 169 | av_dlog(avr, "\n"); |
| 170 | } |
| 171 | #endif |
| 172 | } else |
| 173 | avr->remap_point = REMAP_NONE; |
| 174 | |
| 175 | /* allocate buffers */ |
| 176 | if (avr->in_copy_needed || avr->in_convert_needed) { |
| 177 | avr->in_buffer = ff_audio_data_alloc(FFMAX(avr->in_channels, avr->out_channels), |
| 178 | 0, avr->internal_sample_fmt, |
| 179 | "in_buffer"); |
| 180 | if (!avr->in_buffer) { |
| 181 | ret = AVERROR(EINVAL); |
| 182 | goto error; |
| 183 | } |
| 184 | } |
| 185 | if (avr->resample_needed) { |
| 186 | avr->resample_out_buffer = ff_audio_data_alloc(avr->out_channels, |
| 187 | 1024, avr->internal_sample_fmt, |
| 188 | "resample_out_buffer"); |
| 189 | if (!avr->resample_out_buffer) { |
| 190 | ret = AVERROR(EINVAL); |
| 191 | goto error; |
| 192 | } |
| 193 | } |
| 194 | if (avr->out_convert_needed) { |
| 195 | avr->out_buffer = ff_audio_data_alloc(avr->out_channels, 0, |
| 196 | avr->out_sample_fmt, "out_buffer"); |
| 197 | if (!avr->out_buffer) { |
| 198 | ret = AVERROR(EINVAL); |
| 199 | goto error; |
| 200 | } |
| 201 | } |
| 202 | avr->out_fifo = av_audio_fifo_alloc(avr->out_sample_fmt, avr->out_channels, |
| 203 | 1024); |
| 204 | if (!avr->out_fifo) { |
| 205 | ret = AVERROR(ENOMEM); |
| 206 | goto error; |
| 207 | } |
| 208 | |
| 209 | /* setup contexts */ |
| 210 | if (avr->in_convert_needed) { |
| 211 | avr->ac_in = ff_audio_convert_alloc(avr, avr->internal_sample_fmt, |
| 212 | avr->in_sample_fmt, avr->in_channels, |
| 213 | avr->in_sample_rate, |
| 214 | avr->remap_point == REMAP_IN_CONVERT); |
| 215 | if (!avr->ac_in) { |
| 216 | ret = AVERROR(ENOMEM); |
| 217 | goto error; |
| 218 | } |
| 219 | } |
| 220 | if (avr->out_convert_needed) { |
| 221 | enum AVSampleFormat src_fmt; |
| 222 | if (avr->in_convert_needed) |
| 223 | src_fmt = avr->internal_sample_fmt; |
| 224 | else |
| 225 | src_fmt = avr->in_sample_fmt; |
| 226 | avr->ac_out = ff_audio_convert_alloc(avr, avr->out_sample_fmt, src_fmt, |
| 227 | avr->out_channels, |
| 228 | avr->out_sample_rate, |
| 229 | avr->remap_point == REMAP_OUT_CONVERT); |
| 230 | if (!avr->ac_out) { |
| 231 | ret = AVERROR(ENOMEM); |
| 232 | goto error; |
| 233 | } |
| 234 | } |
| 235 | if (avr->resample_needed) { |
| 236 | avr->resample = ff_audio_resample_init(avr); |
| 237 | if (!avr->resample) { |
| 238 | ret = AVERROR(ENOMEM); |
| 239 | goto error; |
| 240 | } |
| 241 | } |
| 242 | if (avr->mixing_needed) { |
| 243 | avr->am = ff_audio_mix_alloc(avr); |
| 244 | if (!avr->am) { |
| 245 | ret = AVERROR(ENOMEM); |
| 246 | goto error; |
| 247 | } |
| 248 | } |
| 249 | |
| 250 | return 0; |
| 251 | |
| 252 | error: |
| 253 | avresample_close(avr); |
| 254 | return ret; |
| 255 | } |
| 256 | |
| 257 | int avresample_is_open(AVAudioResampleContext *avr) |
| 258 | { |
| 259 | return !!avr->out_fifo; |
| 260 | } |
| 261 | |
| 262 | void avresample_close(AVAudioResampleContext *avr) |
| 263 | { |
| 264 | ff_audio_data_free(&avr->in_buffer); |
| 265 | ff_audio_data_free(&avr->resample_out_buffer); |
| 266 | ff_audio_data_free(&avr->out_buffer); |
| 267 | av_audio_fifo_free(avr->out_fifo); |
| 268 | avr->out_fifo = NULL; |
| 269 | ff_audio_convert_free(&avr->ac_in); |
| 270 | ff_audio_convert_free(&avr->ac_out); |
| 271 | ff_audio_resample_free(&avr->resample); |
| 272 | ff_audio_mix_free(&avr->am); |
| 273 | av_freep(&avr->mix_matrix); |
| 274 | |
| 275 | avr->use_channel_map = 0; |
| 276 | } |
| 277 | |
| 278 | void avresample_free(AVAudioResampleContext **avr) |
| 279 | { |
| 280 | if (!*avr) |
| 281 | return; |
| 282 | avresample_close(*avr); |
| 283 | av_opt_free(*avr); |
| 284 | av_freep(avr); |
| 285 | } |
| 286 | |
| 287 | static int handle_buffered_output(AVAudioResampleContext *avr, |
| 288 | AudioData *output, AudioData *converted) |
| 289 | { |
| 290 | int ret; |
| 291 | |
| 292 | if (!output || av_audio_fifo_size(avr->out_fifo) > 0 || |
| 293 | (converted && output->allocated_samples < converted->nb_samples)) { |
| 294 | if (converted) { |
| 295 | /* if there are any samples in the output FIFO or if the |
| 296 | user-supplied output buffer is not large enough for all samples, |
| 297 | we add to the output FIFO */ |
| 298 | av_dlog(avr, "[FIFO] add %s to out_fifo\n", converted->name); |
| 299 | ret = ff_audio_data_add_to_fifo(avr->out_fifo, converted, 0, |
| 300 | converted->nb_samples); |
| 301 | if (ret < 0) |
| 302 | return ret; |
| 303 | } |
| 304 | |
| 305 | /* if the user specified an output buffer, read samples from the output |
| 306 | FIFO to the user output */ |
| 307 | if (output && output->allocated_samples > 0) { |
| 308 | av_dlog(avr, "[FIFO] read from out_fifo to output\n"); |
| 309 | av_dlog(avr, "[end conversion]\n"); |
| 310 | return ff_audio_data_read_from_fifo(avr->out_fifo, output, |
| 311 | output->allocated_samples); |
| 312 | } |
| 313 | } else if (converted) { |
| 314 | /* copy directly to output if it is large enough or there is not any |
| 315 | data in the output FIFO */ |
| 316 | av_dlog(avr, "[copy] %s to output\n", converted->name); |
| 317 | output->nb_samples = 0; |
| 318 | ret = ff_audio_data_copy(output, converted, |
| 319 | avr->remap_point == REMAP_OUT_COPY ? |
| 320 | &avr->ch_map_info : NULL); |
| 321 | if (ret < 0) |
| 322 | return ret; |
| 323 | av_dlog(avr, "[end conversion]\n"); |
| 324 | return output->nb_samples; |
| 325 | } |
| 326 | av_dlog(avr, "[end conversion]\n"); |
| 327 | return 0; |
| 328 | } |
| 329 | |
| 330 | int attribute_align_arg avresample_convert(AVAudioResampleContext *avr, |
| 331 | uint8_t **output, int out_plane_size, |
| 332 | int out_samples, uint8_t **input, |
| 333 | int in_plane_size, int in_samples) |
| 334 | { |
| 335 | AudioData input_buffer; |
| 336 | AudioData output_buffer; |
| 337 | AudioData *current_buffer; |
| 338 | int ret, direct_output; |
| 339 | |
| 340 | /* reset internal buffers */ |
| 341 | if (avr->in_buffer) { |
| 342 | avr->in_buffer->nb_samples = 0; |
| 343 | ff_audio_data_set_channels(avr->in_buffer, |
| 344 | avr->in_buffer->allocated_channels); |
| 345 | } |
| 346 | if (avr->resample_out_buffer) { |
| 347 | avr->resample_out_buffer->nb_samples = 0; |
| 348 | ff_audio_data_set_channels(avr->resample_out_buffer, |
| 349 | avr->resample_out_buffer->allocated_channels); |
| 350 | } |
| 351 | if (avr->out_buffer) { |
| 352 | avr->out_buffer->nb_samples = 0; |
| 353 | ff_audio_data_set_channels(avr->out_buffer, |
| 354 | avr->out_buffer->allocated_channels); |
| 355 | } |
| 356 | |
| 357 | av_dlog(avr, "[start conversion]\n"); |
| 358 | |
| 359 | /* initialize output_buffer with output data */ |
| 360 | direct_output = output && av_audio_fifo_size(avr->out_fifo) == 0; |
| 361 | if (output) { |
| 362 | ret = ff_audio_data_init(&output_buffer, output, out_plane_size, |
| 363 | avr->out_channels, out_samples, |
| 364 | avr->out_sample_fmt, 0, "output"); |
| 365 | if (ret < 0) |
| 366 | return ret; |
| 367 | output_buffer.nb_samples = 0; |
| 368 | } |
| 369 | |
| 370 | if (input) { |
| 371 | /* initialize input_buffer with input data */ |
| 372 | ret = ff_audio_data_init(&input_buffer, input, in_plane_size, |
| 373 | avr->in_channels, in_samples, |
| 374 | avr->in_sample_fmt, 1, "input"); |
| 375 | if (ret < 0) |
| 376 | return ret; |
| 377 | current_buffer = &input_buffer; |
| 378 | |
| 379 | if (avr->upmix_needed && !avr->in_convert_needed && !avr->resample_needed && |
| 380 | !avr->out_convert_needed && direct_output && out_samples >= in_samples) { |
| 381 | /* in some rare cases we can copy input to output and upmix |
| 382 | directly in the output buffer */ |
| 383 | av_dlog(avr, "[copy] %s to output\n", current_buffer->name); |
| 384 | ret = ff_audio_data_copy(&output_buffer, current_buffer, |
| 385 | avr->remap_point == REMAP_OUT_COPY ? |
| 386 | &avr->ch_map_info : NULL); |
| 387 | if (ret < 0) |
| 388 | return ret; |
| 389 | current_buffer = &output_buffer; |
| 390 | } else if (avr->remap_point == REMAP_OUT_COPY && |
| 391 | (!direct_output || out_samples < in_samples)) { |
| 392 | /* if remapping channels during output copy, we may need to |
| 393 | * use an intermediate buffer in order to remap before adding |
| 394 | * samples to the output fifo */ |
| 395 | av_dlog(avr, "[copy] %s to out_buffer\n", current_buffer->name); |
| 396 | ret = ff_audio_data_copy(avr->out_buffer, current_buffer, |
| 397 | &avr->ch_map_info); |
| 398 | if (ret < 0) |
| 399 | return ret; |
| 400 | current_buffer = avr->out_buffer; |
| 401 | } else if (avr->in_copy_needed || avr->in_convert_needed) { |
| 402 | /* if needed, copy or convert input to in_buffer, and downmix if |
| 403 | applicable */ |
| 404 | if (avr->in_convert_needed) { |
| 405 | ret = ff_audio_data_realloc(avr->in_buffer, |
| 406 | current_buffer->nb_samples); |
| 407 | if (ret < 0) |
| 408 | return ret; |
| 409 | av_dlog(avr, "[convert] %s to in_buffer\n", current_buffer->name); |
| 410 | ret = ff_audio_convert(avr->ac_in, avr->in_buffer, |
| 411 | current_buffer); |
| 412 | if (ret < 0) |
| 413 | return ret; |
| 414 | } else { |
| 415 | av_dlog(avr, "[copy] %s to in_buffer\n", current_buffer->name); |
| 416 | ret = ff_audio_data_copy(avr->in_buffer, current_buffer, |
| 417 | avr->remap_point == REMAP_IN_COPY ? |
| 418 | &avr->ch_map_info : NULL); |
| 419 | if (ret < 0) |
| 420 | return ret; |
| 421 | } |
| 422 | ff_audio_data_set_channels(avr->in_buffer, avr->in_channels); |
| 423 | if (avr->downmix_needed) { |
| 424 | av_dlog(avr, "[downmix] in_buffer\n"); |
| 425 | ret = ff_audio_mix(avr->am, avr->in_buffer); |
| 426 | if (ret < 0) |
| 427 | return ret; |
| 428 | } |
| 429 | current_buffer = avr->in_buffer; |
| 430 | } |
| 431 | } else { |
| 432 | /* flush resampling buffer and/or output FIFO if input is NULL */ |
| 433 | if (!avr->resample_needed) |
| 434 | return handle_buffered_output(avr, output ? &output_buffer : NULL, |
| 435 | NULL); |
| 436 | current_buffer = NULL; |
| 437 | } |
| 438 | |
| 439 | if (avr->resample_needed) { |
| 440 | AudioData *resample_out; |
| 441 | |
| 442 | if (!avr->out_convert_needed && direct_output && out_samples > 0) |
| 443 | resample_out = &output_buffer; |
| 444 | else |
| 445 | resample_out = avr->resample_out_buffer; |
| 446 | av_dlog(avr, "[resample] %s to %s\n", |
| 447 | current_buffer ? current_buffer->name : "null", |
| 448 | resample_out->name); |
| 449 | ret = ff_audio_resample(avr->resample, resample_out, |
| 450 | current_buffer); |
| 451 | if (ret < 0) |
| 452 | return ret; |
| 453 | |
| 454 | /* if resampling did not produce any samples, just return 0 */ |
| 455 | if (resample_out->nb_samples == 0) { |
| 456 | av_dlog(avr, "[end conversion]\n"); |
| 457 | return 0; |
| 458 | } |
| 459 | |
| 460 | current_buffer = resample_out; |
| 461 | } |
| 462 | |
| 463 | if (avr->upmix_needed) { |
| 464 | av_dlog(avr, "[upmix] %s\n", current_buffer->name); |
| 465 | ret = ff_audio_mix(avr->am, current_buffer); |
| 466 | if (ret < 0) |
| 467 | return ret; |
| 468 | } |
| 469 | |
| 470 | /* if we resampled or upmixed directly to output, return here */ |
| 471 | if (current_buffer == &output_buffer) { |
| 472 | av_dlog(avr, "[end conversion]\n"); |
| 473 | return current_buffer->nb_samples; |
| 474 | } |
| 475 | |
| 476 | if (avr->out_convert_needed) { |
| 477 | if (direct_output && out_samples >= current_buffer->nb_samples) { |
| 478 | /* convert directly to output */ |
| 479 | av_dlog(avr, "[convert] %s to output\n", current_buffer->name); |
| 480 | ret = ff_audio_convert(avr->ac_out, &output_buffer, current_buffer); |
| 481 | if (ret < 0) |
| 482 | return ret; |
| 483 | |
| 484 | av_dlog(avr, "[end conversion]\n"); |
| 485 | return output_buffer.nb_samples; |
| 486 | } else { |
| 487 | ret = ff_audio_data_realloc(avr->out_buffer, |
| 488 | current_buffer->nb_samples); |
| 489 | if (ret < 0) |
| 490 | return ret; |
| 491 | av_dlog(avr, "[convert] %s to out_buffer\n", current_buffer->name); |
| 492 | ret = ff_audio_convert(avr->ac_out, avr->out_buffer, |
| 493 | current_buffer); |
| 494 | if (ret < 0) |
| 495 | return ret; |
| 496 | current_buffer = avr->out_buffer; |
| 497 | } |
| 498 | } |
| 499 | |
| 500 | return handle_buffered_output(avr, output ? &output_buffer : NULL, |
| 501 | current_buffer); |
| 502 | } |
| 503 | |
| 504 | int avresample_config(AVAudioResampleContext *avr, AVFrame *out, AVFrame *in) |
| 505 | { |
| 506 | if (avresample_is_open(avr)) { |
| 507 | avresample_close(avr); |
| 508 | } |
| 509 | |
| 510 | if (in) { |
| 511 | avr->in_channel_layout = in->channel_layout; |
| 512 | avr->in_sample_rate = in->sample_rate; |
| 513 | avr->in_sample_fmt = in->format; |
| 514 | } |
| 515 | |
| 516 | if (out) { |
| 517 | avr->out_channel_layout = out->channel_layout; |
| 518 | avr->out_sample_rate = out->sample_rate; |
| 519 | avr->out_sample_fmt = out->format; |
| 520 | } |
| 521 | |
| 522 | return 0; |
| 523 | } |
| 524 | |
| 525 | static int config_changed(AVAudioResampleContext *avr, |
| 526 | AVFrame *out, AVFrame *in) |
| 527 | { |
| 528 | int ret = 0; |
| 529 | |
| 530 | if (in) { |
| 531 | if (avr->in_channel_layout != in->channel_layout || |
| 532 | avr->in_sample_rate != in->sample_rate || |
| 533 | avr->in_sample_fmt != in->format) { |
| 534 | ret |= AVERROR_INPUT_CHANGED; |
| 535 | } |
| 536 | } |
| 537 | |
| 538 | if (out) { |
| 539 | if (avr->out_channel_layout != out->channel_layout || |
| 540 | avr->out_sample_rate != out->sample_rate || |
| 541 | avr->out_sample_fmt != out->format) { |
| 542 | ret |= AVERROR_OUTPUT_CHANGED; |
| 543 | } |
| 544 | } |
| 545 | |
| 546 | return ret; |
| 547 | } |
| 548 | |
| 549 | static inline int convert_frame(AVAudioResampleContext *avr, |
| 550 | AVFrame *out, AVFrame *in) |
| 551 | { |
| 552 | int ret; |
| 553 | uint8_t **out_data = NULL, **in_data = NULL; |
| 554 | int out_linesize = 0, in_linesize = 0; |
| 555 | int out_nb_samples = 0, in_nb_samples = 0; |
| 556 | |
| 557 | if (out) { |
| 558 | out_data = out->extended_data; |
| 559 | out_linesize = out->linesize[0]; |
| 560 | out_nb_samples = out->nb_samples; |
| 561 | } |
| 562 | |
| 563 | if (in) { |
| 564 | in_data = in->extended_data; |
| 565 | in_linesize = in->linesize[0]; |
| 566 | in_nb_samples = in->nb_samples; |
| 567 | } |
| 568 | |
| 569 | ret = avresample_convert(avr, out_data, out_linesize, |
| 570 | out_nb_samples, |
| 571 | in_data, in_linesize, |
| 572 | in_nb_samples); |
| 573 | |
| 574 | if (ret < 0) { |
| 575 | if (out) |
| 576 | out->nb_samples = 0; |
| 577 | return ret; |
| 578 | } |
| 579 | |
| 580 | if (out) |
| 581 | out->nb_samples = ret; |
| 582 | |
| 583 | return 0; |
| 584 | } |
| 585 | |
| 586 | static inline int available_samples(AVFrame *out) |
| 587 | { |
| 588 | int bytes_per_sample = av_get_bytes_per_sample(out->format); |
| 589 | int samples = out->linesize[0] / bytes_per_sample; |
| 590 | |
| 591 | if (av_sample_fmt_is_planar(out->format)) { |
| 592 | return samples; |
| 593 | } else { |
| 594 | int channels = av_get_channel_layout_nb_channels(out->channel_layout); |
| 595 | return samples / channels; |
| 596 | } |
| 597 | } |
| 598 | |
| 599 | int avresample_convert_frame(AVAudioResampleContext *avr, |
| 600 | AVFrame *out, AVFrame *in) |
| 601 | { |
| 602 | int ret, setup = 0; |
| 603 | |
| 604 | if (!avresample_is_open(avr)) { |
| 605 | if ((ret = avresample_config(avr, out, in)) < 0) |
| 606 | return ret; |
| 607 | if ((ret = avresample_open(avr)) < 0) |
| 608 | return ret; |
| 609 | setup = 1; |
| 610 | } else { |
| 611 | // return as is or reconfigure for input changes? |
| 612 | if ((ret = config_changed(avr, out, in))) |
| 613 | return ret; |
| 614 | } |
| 615 | |
| 616 | if (out) { |
| 617 | if (!out->linesize[0]) { |
| 618 | out->nb_samples = avresample_get_out_samples(avr, in->nb_samples); |
| 619 | if ((ret = av_frame_get_buffer(out, 0)) < 0) { |
| 620 | if (setup) |
| 621 | avresample_close(avr); |
| 622 | return ret; |
| 623 | } |
| 624 | } else { |
| 625 | if (!out->nb_samples) |
| 626 | out->nb_samples = available_samples(out); |
| 627 | } |
| 628 | } |
| 629 | |
| 630 | return convert_frame(avr, out, in); |
| 631 | } |
| 632 | |
| 633 | int avresample_get_matrix(AVAudioResampleContext *avr, double *matrix, |
| 634 | int stride) |
| 635 | { |
| 636 | int in_channels, out_channels, i, o; |
| 637 | |
| 638 | if (avr->am) |
| 639 | return ff_audio_mix_get_matrix(avr->am, matrix, stride); |
| 640 | |
| 641 | in_channels = av_get_channel_layout_nb_channels(avr->in_channel_layout); |
| 642 | out_channels = av_get_channel_layout_nb_channels(avr->out_channel_layout); |
| 643 | |
| 644 | if ( in_channels <= 0 || in_channels > AVRESAMPLE_MAX_CHANNELS || |
| 645 | out_channels <= 0 || out_channels > AVRESAMPLE_MAX_CHANNELS) { |
| 646 | av_log(avr, AV_LOG_ERROR, "Invalid channel layouts\n"); |
| 647 | return AVERROR(EINVAL); |
| 648 | } |
| 649 | |
| 650 | if (!avr->mix_matrix) { |
| 651 | av_log(avr, AV_LOG_ERROR, "matrix is not set\n"); |
| 652 | return AVERROR(EINVAL); |
| 653 | } |
| 654 | |
| 655 | for (o = 0; o < out_channels; o++) |
| 656 | for (i = 0; i < in_channels; i++) |
| 657 | matrix[o * stride + i] = avr->mix_matrix[o * in_channels + i]; |
| 658 | |
| 659 | return 0; |
| 660 | } |
| 661 | |
| 662 | int avresample_set_matrix(AVAudioResampleContext *avr, const double *matrix, |
| 663 | int stride) |
| 664 | { |
| 665 | int in_channels, out_channels, i, o; |
| 666 | |
| 667 | if (avr->am) |
| 668 | return ff_audio_mix_set_matrix(avr->am, matrix, stride); |
| 669 | |
| 670 | in_channels = av_get_channel_layout_nb_channels(avr->in_channel_layout); |
| 671 | out_channels = av_get_channel_layout_nb_channels(avr->out_channel_layout); |
| 672 | |
| 673 | if ( in_channels <= 0 || in_channels > AVRESAMPLE_MAX_CHANNELS || |
| 674 | out_channels <= 0 || out_channels > AVRESAMPLE_MAX_CHANNELS) { |
| 675 | av_log(avr, AV_LOG_ERROR, "Invalid channel layouts\n"); |
| 676 | return AVERROR(EINVAL); |
| 677 | } |
| 678 | |
| 679 | if (avr->mix_matrix) |
| 680 | av_freep(&avr->mix_matrix); |
| 681 | avr->mix_matrix = av_malloc(in_channels * out_channels * |
| 682 | sizeof(*avr->mix_matrix)); |
| 683 | if (!avr->mix_matrix) |
| 684 | return AVERROR(ENOMEM); |
| 685 | |
| 686 | for (o = 0; o < out_channels; o++) |
| 687 | for (i = 0; i < in_channels; i++) |
| 688 | avr->mix_matrix[o * in_channels + i] = matrix[o * stride + i]; |
| 689 | |
| 690 | return 0; |
| 691 | } |
| 692 | |
| 693 | int avresample_set_channel_mapping(AVAudioResampleContext *avr, |
| 694 | const int *channel_map) |
| 695 | { |
| 696 | ChannelMapInfo *info = &avr->ch_map_info; |
| 697 | int in_channels, ch, i; |
| 698 | |
| 699 | in_channels = av_get_channel_layout_nb_channels(avr->in_channel_layout); |
| 700 | if (in_channels <= 0 || in_channels > AVRESAMPLE_MAX_CHANNELS) { |
| 701 | av_log(avr, AV_LOG_ERROR, "Invalid input channel layout\n"); |
| 702 | return AVERROR(EINVAL); |
| 703 | } |
| 704 | |
| 705 | memset(info, 0, sizeof(*info)); |
| 706 | memset(info->input_map, -1, sizeof(info->input_map)); |
| 707 | |
| 708 | for (ch = 0; ch < in_channels; ch++) { |
| 709 | if (channel_map[ch] >= in_channels) { |
| 710 | av_log(avr, AV_LOG_ERROR, "Invalid channel map\n"); |
| 711 | return AVERROR(EINVAL); |
| 712 | } |
| 713 | if (channel_map[ch] < 0) { |
| 714 | info->channel_zero[ch] = 1; |
| 715 | info->channel_map[ch] = -1; |
| 716 | info->do_zero = 1; |
| 717 | } else if (info->input_map[channel_map[ch]] >= 0) { |
| 718 | info->channel_copy[ch] = info->input_map[channel_map[ch]]; |
| 719 | info->channel_map[ch] = -1; |
| 720 | info->do_copy = 1; |
| 721 | } else { |
| 722 | info->channel_map[ch] = channel_map[ch]; |
| 723 | info->input_map[channel_map[ch]] = ch; |
| 724 | info->do_remap = 1; |
| 725 | } |
| 726 | } |
| 727 | /* Fill-in unmapped input channels with unmapped output channels. |
| 728 | This is used when remapping during conversion from interleaved to |
| 729 | planar format. */ |
| 730 | for (ch = 0, i = 0; ch < in_channels && i < in_channels; ch++, i++) { |
| 731 | while (ch < in_channels && info->input_map[ch] >= 0) |
| 732 | ch++; |
| 733 | while (i < in_channels && info->channel_map[i] >= 0) |
| 734 | i++; |
| 735 | if (ch >= in_channels || i >= in_channels) |
| 736 | break; |
| 737 | info->input_map[ch] = i; |
| 738 | } |
| 739 | |
| 740 | avr->use_channel_map = 1; |
| 741 | return 0; |
| 742 | } |
| 743 | |
| 744 | int avresample_available(AVAudioResampleContext *avr) |
| 745 | { |
| 746 | return av_audio_fifo_size(avr->out_fifo); |
| 747 | } |
| 748 | |
| 749 | int avresample_get_out_samples(AVAudioResampleContext *avr, int in_nb_samples) |
| 750 | { |
| 751 | int64_t samples = avresample_get_delay(avr) + (int64_t)in_nb_samples; |
| 752 | |
| 753 | if (avr->resample_needed) { |
| 754 | samples = av_rescale_rnd(samples, |
| 755 | avr->out_sample_rate, |
| 756 | avr->in_sample_rate, |
| 757 | AV_ROUND_UP); |
| 758 | } |
| 759 | |
| 760 | samples += avresample_available(avr); |
| 761 | |
| 762 | if (samples > INT_MAX) |
| 763 | return AVERROR(EINVAL); |
| 764 | |
| 765 | return samples; |
| 766 | } |
| 767 | |
| 768 | int avresample_read(AVAudioResampleContext *avr, uint8_t **output, int nb_samples) |
| 769 | { |
| 770 | if (!output) |
| 771 | return av_audio_fifo_drain(avr->out_fifo, nb_samples); |
| 772 | return av_audio_fifo_read(avr->out_fifo, (void**)output, nb_samples); |
| 773 | } |
| 774 | |
| 775 | unsigned avresample_version(void) |
| 776 | { |
| 777 | return LIBAVRESAMPLE_VERSION_INT; |
| 778 | } |
| 779 | |
| 780 | const char *avresample_license(void) |
| 781 | { |
| 782 | #define LICENSE_PREFIX "libavresample license: " |
| 783 | return LICENSE_PREFIX FFMPEG_LICENSE + sizeof(LICENSE_PREFIX) - 1; |
| 784 | } |
| 785 | |
| 786 | const char *avresample_configuration(void) |
| 787 | { |
| 788 | return FFMPEG_CONFIGURATION; |
| 789 | } |