| 1 | /* |
| 2 | * AAC encoder wrapper |
| 3 | * Copyright (c) 2012 Martin Storsjo |
| 4 | * |
| 5 | * This file is part of FFmpeg. |
| 6 | * |
| 7 | * Permission to use, copy, modify, and/or distribute this software for any |
| 8 | * purpose with or without fee is hereby granted, provided that the above |
| 9 | * copyright notice and this permission notice appear in all copies. |
| 10 | * |
| 11 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
| 12 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
| 13 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR |
| 14 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
| 15 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
| 16 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
| 17 | * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
| 18 | */ |
| 19 | |
| 20 | #include <fdk-aac/aacenc_lib.h> |
| 21 | |
| 22 | #include "libavutil/channel_layout.h" |
| 23 | #include "libavutil/common.h" |
| 24 | #include "libavutil/opt.h" |
| 25 | #include "avcodec.h" |
| 26 | #include "audio_frame_queue.h" |
| 27 | #include "internal.h" |
| 28 | |
| 29 | typedef struct AACContext { |
| 30 | const AVClass *class; |
| 31 | HANDLE_AACENCODER handle; |
| 32 | int afterburner; |
| 33 | int eld_sbr; |
| 34 | int signaling; |
| 35 | int latm; |
| 36 | int header_period; |
| 37 | int vbr; |
| 38 | |
| 39 | AudioFrameQueue afq; |
| 40 | } AACContext; |
| 41 | |
| 42 | static const AVOption aac_enc_options[] = { |
| 43 | { "afterburner", "Afterburner (improved quality)", offsetof(AACContext, afterburner), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, 1, AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_ENCODING_PARAM }, |
| 44 | { "eld_sbr", "Enable SBR for ELD (for SBR in other configurations, use the -profile parameter)", offsetof(AACContext, eld_sbr), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_ENCODING_PARAM }, |
| 45 | { "signaling", "SBR/PS signaling style", offsetof(AACContext, signaling), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, 2, AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_ENCODING_PARAM, "signaling" }, |
| 46 | { "default", "Choose signaling implicitly (explicit hierarchical by default, implicit if global header is disabled)", 0, AV_OPT_TYPE_CONST, { .i64 = -1 }, 0, 0, AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_ENCODING_PARAM, "signaling" }, |
| 47 | { "implicit", "Implicit backwards compatible signaling", 0, AV_OPT_TYPE_CONST, { .i64 = 0 }, 0, 0, AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_ENCODING_PARAM, "signaling" }, |
| 48 | { "explicit_sbr", "Explicit SBR, implicit PS signaling", 0, AV_OPT_TYPE_CONST, { .i64 = 1 }, 0, 0, AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_ENCODING_PARAM, "signaling" }, |
| 49 | { "explicit_hierarchical", "Explicit hierarchical signaling", 0, AV_OPT_TYPE_CONST, { .i64 = 2 }, 0, 0, AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_ENCODING_PARAM, "signaling" }, |
| 50 | { "latm", "Output LATM/LOAS encapsulated data", offsetof(AACContext, latm), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_ENCODING_PARAM }, |
| 51 | { "header_period", "StreamMuxConfig and PCE repetition period (in frames)", offsetof(AACContext, header_period), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 0xffff, AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_ENCODING_PARAM }, |
| 52 | { "vbr", "VBR mode (1-5)", offsetof(AACContext, vbr), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 5, AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_ENCODING_PARAM }, |
| 53 | { NULL } |
| 54 | }; |
| 55 | |
| 56 | static const AVClass aac_enc_class = { |
| 57 | "libfdk_aac", av_default_item_name, aac_enc_options, LIBAVUTIL_VERSION_INT |
| 58 | }; |
| 59 | |
| 60 | static const char *aac_get_error(AACENC_ERROR err) |
| 61 | { |
| 62 | switch (err) { |
| 63 | case AACENC_OK: |
| 64 | return "No error"; |
| 65 | case AACENC_INVALID_HANDLE: |
| 66 | return "Invalid handle"; |
| 67 | case AACENC_MEMORY_ERROR: |
| 68 | return "Memory allocation error"; |
| 69 | case AACENC_UNSUPPORTED_PARAMETER: |
| 70 | return "Unsupported parameter"; |
| 71 | case AACENC_INVALID_CONFIG: |
| 72 | return "Invalid config"; |
| 73 | case AACENC_INIT_ERROR: |
| 74 | return "Initialization error"; |
| 75 | case AACENC_INIT_AAC_ERROR: |
| 76 | return "AAC library initialization error"; |
| 77 | case AACENC_INIT_SBR_ERROR: |
| 78 | return "SBR library initialization error"; |
| 79 | case AACENC_INIT_TP_ERROR: |
| 80 | return "Transport library initialization error"; |
| 81 | case AACENC_INIT_META_ERROR: |
| 82 | return "Metadata library initialization error"; |
| 83 | case AACENC_ENCODE_ERROR: |
| 84 | return "Encoding error"; |
| 85 | case AACENC_ENCODE_EOF: |
| 86 | return "End of file"; |
| 87 | default: |
| 88 | return "Unknown error"; |
| 89 | } |
| 90 | } |
| 91 | |
| 92 | static int aac_encode_close(AVCodecContext *avctx) |
| 93 | { |
| 94 | AACContext *s = avctx->priv_data; |
| 95 | |
| 96 | if (s->handle) |
| 97 | aacEncClose(&s->handle); |
| 98 | av_freep(&avctx->extradata); |
| 99 | ff_af_queue_close(&s->afq); |
| 100 | |
| 101 | return 0; |
| 102 | } |
| 103 | |
| 104 | static av_cold int aac_encode_init(AVCodecContext *avctx) |
| 105 | { |
| 106 | AACContext *s = avctx->priv_data; |
| 107 | int ret = AVERROR(EINVAL); |
| 108 | AACENC_InfoStruct info = { 0 }; |
| 109 | CHANNEL_MODE mode; |
| 110 | AACENC_ERROR err; |
| 111 | int aot = FF_PROFILE_AAC_LOW + 1; |
| 112 | int sce = 0, cpe = 0; |
| 113 | |
| 114 | if ((err = aacEncOpen(&s->handle, 0, avctx->channels)) != AACENC_OK) { |
| 115 | av_log(avctx, AV_LOG_ERROR, "Unable to open the encoder: %s\n", |
| 116 | aac_get_error(err)); |
| 117 | goto error; |
| 118 | } |
| 119 | |
| 120 | if (avctx->profile != FF_PROFILE_UNKNOWN) |
| 121 | aot = avctx->profile + 1; |
| 122 | |
| 123 | if ((err = aacEncoder_SetParam(s->handle, AACENC_AOT, aot)) != AACENC_OK) { |
| 124 | av_log(avctx, AV_LOG_ERROR, "Unable to set the AOT %d: %s\n", |
| 125 | aot, aac_get_error(err)); |
| 126 | goto error; |
| 127 | } |
| 128 | |
| 129 | if (aot == FF_PROFILE_AAC_ELD + 1 && s->eld_sbr) { |
| 130 | if ((err = aacEncoder_SetParam(s->handle, AACENC_SBR_MODE, |
| 131 | 1)) != AACENC_OK) { |
| 132 | av_log(avctx, AV_LOG_ERROR, "Unable to enable SBR for ELD: %s\n", |
| 133 | aac_get_error(err)); |
| 134 | goto error; |
| 135 | } |
| 136 | } |
| 137 | |
| 138 | if ((err = aacEncoder_SetParam(s->handle, AACENC_SAMPLERATE, |
| 139 | avctx->sample_rate)) != AACENC_OK) { |
| 140 | av_log(avctx, AV_LOG_ERROR, "Unable to set the sample rate %d: %s\n", |
| 141 | avctx->sample_rate, aac_get_error(err)); |
| 142 | goto error; |
| 143 | } |
| 144 | |
| 145 | switch (avctx->channels) { |
| 146 | case 1: mode = MODE_1; sce = 1; cpe = 0; break; |
| 147 | case 2: mode = MODE_2; sce = 0; cpe = 1; break; |
| 148 | case 3: mode = MODE_1_2; sce = 1; cpe = 1; break; |
| 149 | case 4: mode = MODE_1_2_1; sce = 2; cpe = 1; break; |
| 150 | case 5: mode = MODE_1_2_2; sce = 1; cpe = 2; break; |
| 151 | case 6: mode = MODE_1_2_2_1; sce = 2; cpe = 2; break; |
| 152 | /* The version macro is introduced the same time as the 7.1 support, so this |
| 153 | should suffice. */ |
| 154 | #ifdef AACENCODER_LIB_VL0 |
| 155 | case 8: |
| 156 | sce = 2; |
| 157 | cpe = 3; |
| 158 | if (avctx->channel_layout == AV_CH_LAYOUT_7POINT1) { |
| 159 | mode = MODE_7_1_REAR_SURROUND; |
| 160 | } else { |
| 161 | // MODE_1_2_2_2_1 and MODE_7_1_FRONT_CENTER use the same channel layout |
| 162 | mode = MODE_7_1_FRONT_CENTER; |
| 163 | } |
| 164 | break; |
| 165 | #endif |
| 166 | default: |
| 167 | av_log(avctx, AV_LOG_ERROR, |
| 168 | "Unsupported number of channels %d\n", avctx->channels); |
| 169 | goto error; |
| 170 | } |
| 171 | |
| 172 | if ((err = aacEncoder_SetParam(s->handle, AACENC_CHANNELMODE, |
| 173 | mode)) != AACENC_OK) { |
| 174 | av_log(avctx, AV_LOG_ERROR, |
| 175 | "Unable to set channel mode %d: %s\n", mode, aac_get_error(err)); |
| 176 | goto error; |
| 177 | } |
| 178 | |
| 179 | if ((err = aacEncoder_SetParam(s->handle, AACENC_CHANNELORDER, |
| 180 | 1)) != AACENC_OK) { |
| 181 | av_log(avctx, AV_LOG_ERROR, |
| 182 | "Unable to set wav channel order %d: %s\n", |
| 183 | mode, aac_get_error(err)); |
| 184 | goto error; |
| 185 | } |
| 186 | |
| 187 | if (avctx->flags & CODEC_FLAG_QSCALE || s->vbr) { |
| 188 | int mode = s->vbr ? s->vbr : avctx->global_quality; |
| 189 | if (mode < 1 || mode > 5) { |
| 190 | av_log(avctx, AV_LOG_WARNING, |
| 191 | "VBR quality %d out of range, should be 1-5\n", mode); |
| 192 | mode = av_clip(mode, 1, 5); |
| 193 | } |
| 194 | av_log(avctx, AV_LOG_WARNING, |
| 195 | "Note, the VBR setting is unsupported and only works with " |
| 196 | "some parameter combinations\n"); |
| 197 | if ((err = aacEncoder_SetParam(s->handle, AACENC_BITRATEMODE, |
| 198 | mode)) != AACENC_OK) { |
| 199 | av_log(avctx, AV_LOG_ERROR, "Unable to set the VBR bitrate mode %d: %s\n", |
| 200 | mode, aac_get_error(err)); |
| 201 | goto error; |
| 202 | } |
| 203 | } else { |
| 204 | if (avctx->bit_rate <= 0) { |
| 205 | if (avctx->profile == FF_PROFILE_AAC_HE_V2) { |
| 206 | sce = 1; |
| 207 | cpe = 0; |
| 208 | } |
| 209 | avctx->bit_rate = (96*sce + 128*cpe) * avctx->sample_rate / 44; |
| 210 | if (avctx->profile == FF_PROFILE_AAC_HE || |
| 211 | avctx->profile == FF_PROFILE_AAC_HE_V2 || |
| 212 | avctx->profile == FF_PROFILE_MPEG2_AAC_HE || |
| 213 | s->eld_sbr) |
| 214 | avctx->bit_rate /= 2; |
| 215 | } |
| 216 | if ((err = aacEncoder_SetParam(s->handle, AACENC_BITRATE, |
| 217 | avctx->bit_rate)) != AACENC_OK) { |
| 218 | av_log(avctx, AV_LOG_ERROR, "Unable to set the bitrate %d: %s\n", |
| 219 | avctx->bit_rate, aac_get_error(err)); |
| 220 | goto error; |
| 221 | } |
| 222 | } |
| 223 | |
| 224 | /* Choose bitstream format - if global header is requested, use |
| 225 | * raw access units, otherwise use ADTS. */ |
| 226 | if ((err = aacEncoder_SetParam(s->handle, AACENC_TRANSMUX, |
| 227 | avctx->flags & CODEC_FLAG_GLOBAL_HEADER ? 0 : s->latm ? 10 : 2)) != AACENC_OK) { |
| 228 | av_log(avctx, AV_LOG_ERROR, "Unable to set the transmux format: %s\n", |
| 229 | aac_get_error(err)); |
| 230 | goto error; |
| 231 | } |
| 232 | |
| 233 | if (s->latm && s->header_period) { |
| 234 | if ((err = aacEncoder_SetParam(s->handle, AACENC_HEADER_PERIOD, |
| 235 | s->header_period)) != AACENC_OK) { |
| 236 | av_log(avctx, AV_LOG_ERROR, "Unable to set header period: %s\n", |
| 237 | aac_get_error(err)); |
| 238 | goto error; |
| 239 | } |
| 240 | } |
| 241 | |
| 242 | /* If no signaling mode is chosen, use explicit hierarchical signaling |
| 243 | * if using mp4 mode (raw access units, with global header) and |
| 244 | * implicit signaling if using ADTS. */ |
| 245 | if (s->signaling < 0) |
| 246 | s->signaling = avctx->flags & CODEC_FLAG_GLOBAL_HEADER ? 2 : 0; |
| 247 | |
| 248 | if ((err = aacEncoder_SetParam(s->handle, AACENC_SIGNALING_MODE, |
| 249 | s->signaling)) != AACENC_OK) { |
| 250 | av_log(avctx, AV_LOG_ERROR, "Unable to set signaling mode %d: %s\n", |
| 251 | s->signaling, aac_get_error(err)); |
| 252 | goto error; |
| 253 | } |
| 254 | |
| 255 | if ((err = aacEncoder_SetParam(s->handle, AACENC_AFTERBURNER, |
| 256 | s->afterburner)) != AACENC_OK) { |
| 257 | av_log(avctx, AV_LOG_ERROR, "Unable to set afterburner to %d: %s\n", |
| 258 | s->afterburner, aac_get_error(err)); |
| 259 | goto error; |
| 260 | } |
| 261 | |
| 262 | if (avctx->cutoff > 0) { |
| 263 | if (avctx->cutoff < (avctx->sample_rate + 255) >> 8 || avctx->cutoff > 20000) { |
| 264 | av_log(avctx, AV_LOG_ERROR, "cutoff valid range is %d-20000\n", |
| 265 | (avctx->sample_rate + 255) >> 8); |
| 266 | goto error; |
| 267 | } |
| 268 | if ((err = aacEncoder_SetParam(s->handle, AACENC_BANDWIDTH, |
| 269 | avctx->cutoff)) != AACENC_OK) { |
| 270 | av_log(avctx, AV_LOG_ERROR, "Unable to set the encoder bandwidth to %d: %s\n", |
| 271 | avctx->cutoff, aac_get_error(err)); |
| 272 | goto error; |
| 273 | } |
| 274 | } |
| 275 | |
| 276 | if ((err = aacEncEncode(s->handle, NULL, NULL, NULL, NULL)) != AACENC_OK) { |
| 277 | av_log(avctx, AV_LOG_ERROR, "Unable to initialize the encoder: %s\n", |
| 278 | aac_get_error(err)); |
| 279 | return AVERROR(EINVAL); |
| 280 | } |
| 281 | |
| 282 | if ((err = aacEncInfo(s->handle, &info)) != AACENC_OK) { |
| 283 | av_log(avctx, AV_LOG_ERROR, "Unable to get encoder info: %s\n", |
| 284 | aac_get_error(err)); |
| 285 | goto error; |
| 286 | } |
| 287 | |
| 288 | avctx->frame_size = info.frameLength; |
| 289 | avctx->delay = info.encoderDelay; |
| 290 | ff_af_queue_init(avctx, &s->afq); |
| 291 | |
| 292 | if (avctx->flags & CODEC_FLAG_GLOBAL_HEADER) { |
| 293 | avctx->extradata_size = info.confSize; |
| 294 | avctx->extradata = av_mallocz(avctx->extradata_size + |
| 295 | FF_INPUT_BUFFER_PADDING_SIZE); |
| 296 | if (!avctx->extradata) { |
| 297 | ret = AVERROR(ENOMEM); |
| 298 | goto error; |
| 299 | } |
| 300 | |
| 301 | memcpy(avctx->extradata, info.confBuf, info.confSize); |
| 302 | } |
| 303 | return 0; |
| 304 | error: |
| 305 | aac_encode_close(avctx); |
| 306 | return ret; |
| 307 | } |
| 308 | |
| 309 | static int aac_encode_frame(AVCodecContext *avctx, AVPacket *avpkt, |
| 310 | const AVFrame *frame, int *got_packet_ptr) |
| 311 | { |
| 312 | AACContext *s = avctx->priv_data; |
| 313 | AACENC_BufDesc in_buf = { 0 }, out_buf = { 0 }; |
| 314 | AACENC_InArgs in_args = { 0 }; |
| 315 | AACENC_OutArgs out_args = { 0 }; |
| 316 | int in_buffer_identifier = IN_AUDIO_DATA; |
| 317 | int in_buffer_size, in_buffer_element_size; |
| 318 | int out_buffer_identifier = OUT_BITSTREAM_DATA; |
| 319 | int out_buffer_size, out_buffer_element_size; |
| 320 | void *in_ptr, *out_ptr; |
| 321 | int ret; |
| 322 | AACENC_ERROR err; |
| 323 | |
| 324 | /* handle end-of-stream small frame and flushing */ |
| 325 | if (!frame) { |
| 326 | in_args.numInSamples = -1; |
| 327 | } else { |
| 328 | in_ptr = frame->data[0]; |
| 329 | in_buffer_size = 2 * avctx->channels * frame->nb_samples; |
| 330 | in_buffer_element_size = 2; |
| 331 | |
| 332 | in_args.numInSamples = avctx->channels * frame->nb_samples; |
| 333 | in_buf.numBufs = 1; |
| 334 | in_buf.bufs = &in_ptr; |
| 335 | in_buf.bufferIdentifiers = &in_buffer_identifier; |
| 336 | in_buf.bufSizes = &in_buffer_size; |
| 337 | in_buf.bufElSizes = &in_buffer_element_size; |
| 338 | |
| 339 | /* add current frame to the queue */ |
| 340 | if ((ret = ff_af_queue_add(&s->afq, frame)) < 0) |
| 341 | return ret; |
| 342 | } |
| 343 | |
| 344 | /* The maximum packet size is 6144 bits aka 768 bytes per channel. */ |
| 345 | if ((ret = ff_alloc_packet2(avctx, avpkt, FFMAX(8192, 768 * avctx->channels))) < 0) |
| 346 | return ret; |
| 347 | |
| 348 | out_ptr = avpkt->data; |
| 349 | out_buffer_size = avpkt->size; |
| 350 | out_buffer_element_size = 1; |
| 351 | out_buf.numBufs = 1; |
| 352 | out_buf.bufs = &out_ptr; |
| 353 | out_buf.bufferIdentifiers = &out_buffer_identifier; |
| 354 | out_buf.bufSizes = &out_buffer_size; |
| 355 | out_buf.bufElSizes = &out_buffer_element_size; |
| 356 | |
| 357 | if ((err = aacEncEncode(s->handle, &in_buf, &out_buf, &in_args, |
| 358 | &out_args)) != AACENC_OK) { |
| 359 | if (!frame && err == AACENC_ENCODE_EOF) |
| 360 | return 0; |
| 361 | av_log(avctx, AV_LOG_ERROR, "Unable to encode frame: %s\n", |
| 362 | aac_get_error(err)); |
| 363 | return AVERROR(EINVAL); |
| 364 | } |
| 365 | |
| 366 | if (!out_args.numOutBytes) |
| 367 | return 0; |
| 368 | |
| 369 | /* Get the next frame pts & duration */ |
| 370 | ff_af_queue_remove(&s->afq, avctx->frame_size, &avpkt->pts, |
| 371 | &avpkt->duration); |
| 372 | |
| 373 | avpkt->size = out_args.numOutBytes; |
| 374 | *got_packet_ptr = 1; |
| 375 | return 0; |
| 376 | } |
| 377 | |
| 378 | static const AVProfile profiles[] = { |
| 379 | { FF_PROFILE_AAC_LOW, "LC" }, |
| 380 | { FF_PROFILE_AAC_HE, "HE-AAC" }, |
| 381 | { FF_PROFILE_AAC_HE_V2, "HE-AACv2" }, |
| 382 | { FF_PROFILE_AAC_LD, "LD" }, |
| 383 | { FF_PROFILE_AAC_ELD, "ELD" }, |
| 384 | { FF_PROFILE_UNKNOWN }, |
| 385 | }; |
| 386 | |
| 387 | static const AVCodecDefault aac_encode_defaults[] = { |
| 388 | { "b", "0" }, |
| 389 | { NULL } |
| 390 | }; |
| 391 | |
| 392 | static const uint64_t aac_channel_layout[] = { |
| 393 | AV_CH_LAYOUT_MONO, |
| 394 | AV_CH_LAYOUT_STEREO, |
| 395 | AV_CH_LAYOUT_SURROUND, |
| 396 | AV_CH_LAYOUT_4POINT0, |
| 397 | AV_CH_LAYOUT_5POINT0_BACK, |
| 398 | AV_CH_LAYOUT_5POINT1_BACK, |
| 399 | #ifdef AACENCODER_LIB_VL0 |
| 400 | AV_CH_LAYOUT_7POINT1_WIDE_BACK, |
| 401 | AV_CH_LAYOUT_7POINT1, |
| 402 | #endif |
| 403 | 0, |
| 404 | }; |
| 405 | |
| 406 | static const int aac_sample_rates[] = { |
| 407 | 96000, 88200, 64000, 48000, 44100, 32000, |
| 408 | 24000, 22050, 16000, 12000, 11025, 8000, 0 |
| 409 | }; |
| 410 | |
| 411 | AVCodec ff_libfdk_aac_encoder = { |
| 412 | .name = "libfdk_aac", |
| 413 | .long_name = NULL_IF_CONFIG_SMALL("Fraunhofer FDK AAC"), |
| 414 | .type = AVMEDIA_TYPE_AUDIO, |
| 415 | .id = AV_CODEC_ID_AAC, |
| 416 | .priv_data_size = sizeof(AACContext), |
| 417 | .init = aac_encode_init, |
| 418 | .encode2 = aac_encode_frame, |
| 419 | .close = aac_encode_close, |
| 420 | .capabilities = CODEC_CAP_SMALL_LAST_FRAME | CODEC_CAP_DELAY, |
| 421 | .sample_fmts = (const enum AVSampleFormat[]){ AV_SAMPLE_FMT_S16, |
| 422 | AV_SAMPLE_FMT_NONE }, |
| 423 | .priv_class = &aac_enc_class, |
| 424 | .defaults = aac_encode_defaults, |
| 425 | .profiles = profiles, |
| 426 | .supported_samplerates = aac_sample_rates, |
| 427 | .channel_layouts = aac_channel_layout, |
| 428 | }; |