FFmpeg: libavcodec/libfdk-aacdec.c Source File

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libfdk-aacdec.c

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1 /*

2 * AAC decoder wrapper

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 */

20 #include <fdk-aac/aacdecoder_lib.h>

22 #include "libavutil/channel_layout.h"

23 #include "libavutil/common.h"

24 #include "libavutil/opt.h"

25 #include "avcodec.h"

26 #include "internal.h"

28 /* The version macro is introduced the same time as the setting enum was

29 * changed, so this check should suffice. */

30 #ifndef AACDECODER_LIB_VL0

31 #define AAC_PCM_MAX_OUTPUT_CHANNELS AAC_PCM_OUTPUT_CHANNELS

32 #endif

34 enum ConcealMethod {

35 CONCEAL_METHOD_SPECTRAL_MUTING = 0,

36 CONCEAL_METHOD_NOISE_SUBSTITUTION = 1,

37 CONCEAL_METHOD_ENERGY_INTERPOLATION = 2,

38 CONCEAL_METHOD_NB,

39 };

41 typedef struct FDKAACDecContext {

42 const AVClass *class;

43 HANDLE_AACDECODER handle;

44 int initialized;

45 uint8_t *decoder_buffer;

46 uint8_t *anc_buffer;

47 int conceal_method;

48 int drc_level;

49 int drc_boost;

50 int drc_heavy;

51 int drc_cut;

52 int level_limit;

53 } FDKAACDecContext;

56 #define DMX_ANC_BUFFSIZE 128

57 #define DECODER_MAX_CHANNELS 6

58 #define DECODER_BUFFSIZE 2048 * sizeof(INT_PCM)

60 #define OFFSET(x) offsetof(FDKAACDecContext, x)

61 #define AD AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_DECODING_PARAM

62 static const AVOption fdk_aac_dec_options[] = {

63 { "conceal", "Error concealment method", OFFSET(conceal_method), AV_OPT_TYPE_INT, { .i64 = CONCEAL_METHOD_NOISE_SUBSTITUTION }, CONCEAL_METHOD_SPECTRAL_MUTING, CONCEAL_METHOD_NB - 1, AD, "conceal" },

64 { "spectral", "Spectral muting", 0, AV_OPT_TYPE_CONST, { .i64 = CONCEAL_METHOD_SPECTRAL_MUTING }, INT_MIN, INT_MAX, AD, "conceal" },

65 { "noise", "Noise Substitution", 0, AV_OPT_TYPE_CONST, { .i64 = CONCEAL_METHOD_NOISE_SUBSTITUTION }, INT_MIN, INT_MAX, AD, "conceal" },

66 { "energy", "Energy Interpolation", 0, AV_OPT_TYPE_CONST, { .i64 = CONCEAL_METHOD_ENERGY_INTERPOLATION }, INT_MIN, INT_MAX, AD, "conceal" },

67 { "drc_boost", "Dynamic Range Control: boost, where [0] is none and [127] is max boost",

68 OFFSET(drc_boost), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, 127, AD, NULL },

69 { "drc_cut", "Dynamic Range Control: attenuation factor, where [0] is none and [127] is max compression",

70 OFFSET(drc_cut), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, 127, AD, NULL },

71 { "drc_level", "Dynamic Range Control: reference level, quantized to 0.25dB steps where [0] is 0dB and [127] is -31.75dB",

72 OFFSET(drc_level), AV_OPT_TYPE_INT, { .i64 = -1}, -1, 127, AD, NULL },

73 { "drc_heavy", "Dynamic Range Control: heavy compression, where [1] is on (RF mode) and [0] is off",

74 OFFSET(drc_heavy), AV_OPT_TYPE_INT, { .i64 = -1}, -1, 1, AD, NULL },

75 #ifdef AACDECODER_LIB_VL0

76 { "level_limit", "Signal level limiting", OFFSET(level_limit), AV_OPT_TYPE_INT, { .i64 = 0 }, -1, 1, AD },

77 #endif

78 { NULL }

79 };

81 static const AVClass fdk_aac_dec_class = {

82 "libfdk-aac decoder", av_default_item_name, fdk_aac_dec_options, LIBAVUTIL_VERSION_INT

83 };

85 static int get_stream_info(AVCodecContext *avctx)

86 {

87 FDKAACDecContext *s = avctx->priv_data;

88 CStreamInfo *info = aacDecoder_GetStreamInfo(s->handle);

89 int channel_counts[0x24] = { 0 };

90 int i, ch_error = 0;

91 uint64_t ch_layout = 0;

93 if (!info) {

94 av_log(avctx, AV_LOG_ERROR, "Unable to get stream info\n");

95 return AVERROR_UNKNOWN;

96 }

98 if (info->sampleRate <= 0) {

99 av_log(avctx, AV_LOG_ERROR, "Stream info not initialized\n");

100 return AVERROR_UNKNOWN;

101 }

102 avctx->sample_rate = info->sampleRate;

103 avctx->frame_size = info->frameSize;

104

105 for (i = 0; i < info->numChannels; i++) {

106 AUDIO_CHANNEL_TYPE ctype = info->pChannelType[i];

107 if (ctype <= ACT_NONE || ctype >= FF_ARRAY_ELEMS(channel_counts)) {

108 av_log(avctx, AV_LOG_WARNING, "unknown channel type\n");

109 break;

110 }

111 channel_counts[ctype]++;

112 }

113 av_log(avctx, AV_LOG_DEBUG,

114 "%d channels - front:%d side:%d back:%d lfe:%d top:%d\n",

115 info->numChannels,

116 channel_counts[ACT_FRONT], channel_counts[ACT_SIDE],

117 channel_counts[ACT_BACK], channel_counts[ACT_LFE],

118 channel_counts[ACT_FRONT_TOP] + channel_counts[ACT_SIDE_TOP] +

119 channel_counts[ACT_BACK_TOP] + channel_counts[ACT_TOP]);

120

121 switch (channel_counts[ACT_FRONT]) {

122 case 4:

123 ch_layout |= AV_CH_LAYOUT_STEREO | AV_CH_FRONT_LEFT_OF_CENTER |

124 AV_CH_FRONT_RIGHT_OF_CENTER;

125 break;

126 case 3:

127 ch_layout |= AV_CH_LAYOUT_STEREO | AV_CH_FRONT_CENTER;

128 break;

129 case 2:

130 ch_layout |= AV_CH_LAYOUT_STEREO;

131 break;

132 case 1:

133 ch_layout |= AV_CH_FRONT_CENTER;

134 break;

135 default:

136 av_log(avctx, AV_LOG_WARNING,

137 "unsupported number of front channels: %d\n",

138 channel_counts[ACT_FRONT]);

139 ch_error = 1;

140 break;

141 }

142 if (channel_counts[ACT_SIDE] > 0) {

143 if (channel_counts[ACT_SIDE] == 2) {

144 ch_layout |= AV_CH_SIDE_LEFT | AV_CH_SIDE_RIGHT;

145 } else {

146 av_log(avctx, AV_LOG_WARNING,

147 "unsupported number of side channels: %d\n",

148 channel_counts[ACT_SIDE]);

149 ch_error = 1;

150 }

151 }

152 if (channel_counts[ACT_BACK] > 0) {

153 switch (channel_counts[ACT_BACK]) {

154 case 3:

155 ch_layout |= AV_CH_BACK_LEFT | AV_CH_BACK_RIGHT | AV_CH_BACK_CENTER;

156 break;

157 case 2:

158 ch_layout |= AV_CH_BACK_LEFT | AV_CH_BACK_RIGHT;

159 break;

160 case 1:

161 ch_layout |= AV_CH_BACK_CENTER;

162 break;

163 default:

164 av_log(avctx, AV_LOG_WARNING,

165 "unsupported number of back channels: %d\n",

166 channel_counts[ACT_BACK]);

167 ch_error = 1;

168 break;

169 }

170 }

171 if (channel_counts[ACT_LFE] > 0) {

172 if (channel_counts[ACT_LFE] == 1) {

173 ch_layout |= AV_CH_LOW_FREQUENCY;

174 } else {

175 av_log(avctx, AV_LOG_WARNING,

176 "unsupported number of LFE channels: %d\n",

177 channel_counts[ACT_LFE]);

178 ch_error = 1;

179 }

180 }

181 if (!ch_error &&

182 av_get_channel_layout_nb_channels(ch_layout) != info->numChannels) {

183 av_log(avctx, AV_LOG_WARNING, "unsupported channel configuration\n");

184 ch_error = 1;

185 }

186 if (ch_error)

187 avctx->channel_layout = 0;

188 else

189 avctx->channel_layout = ch_layout;

190

191 avctx->channels = info->numChannels;

192

193 return 0;

194 }

195

196 static av_cold int fdk_aac_decode_close(AVCodecContext *avctx)

197 {

198 FDKAACDecContext *s = avctx->priv_data;

199

200 if (s->handle)

201 aacDecoder_Close(s->handle);

202 av_freep(&s->decoder_buffer);

203 av_freep(&s->anc_buffer);

204

205 return 0;

206 }

207

208 static av_cold int fdk_aac_decode_init(AVCodecContext *avctx)

209 {

210 FDKAACDecContext *s = avctx->priv_data;

211 AAC_DECODER_ERROR err;

212 int ret;

213

214 s->handle = aacDecoder_Open(avctx->extradata_size ? TT_MP4_RAW : TT_MP4_ADTS, 1);

215 if (!s->handle) {

216 av_log(avctx, AV_LOG_ERROR, "Error opening decoder\n");

217 return AVERROR_UNKNOWN;

218 }

219

220 if (avctx->extradata_size) {

221 if ((err = aacDecoder_ConfigRaw(s->handle, &avctx->extradata,

222 &avctx->extradata_size)) != AAC_DEC_OK) {

223 av_log(avctx, AV_LOG_ERROR, "Unable to set extradata\n");

224 return AVERROR_INVALIDDATA;

225 }

226 }

227

228 if ((err = aacDecoder_SetParam(s->handle, AAC_CONCEAL_METHOD,

229 s->conceal_method)) != AAC_DEC_OK) {

230 av_log(avctx, AV_LOG_ERROR, "Unable to set error concealment method\n");

231 return AVERROR_UNKNOWN;

232 }

233

234 if (avctx->request_channel_layout > 0 &&

235 avctx->request_channel_layout != AV_CH_LAYOUT_NATIVE) {

236 int downmix_channels = -1;

237

238 switch (avctx->request_channel_layout) {

239 case AV_CH_LAYOUT_STEREO:

240 case AV_CH_LAYOUT_STEREO_DOWNMIX:

241 downmix_channels = 2;

242 break;

243 case AV_CH_LAYOUT_MONO:

244 downmix_channels = 1;

245 break;

246 default:

247 av_log(avctx, AV_LOG_WARNING, "Invalid request_channel_layout\n");

248 break;

249 }

250

251 if (downmix_channels != -1) {

252 if (aacDecoder_SetParam(s->handle, AAC_PCM_MAX_OUTPUT_CHANNELS,

253 downmix_channels) != AAC_DEC_OK) {

254 av_log(avctx, AV_LOG_WARNING, "Unable to set output channels in the decoder\n");

255 } else {

256 s->anc_buffer = av_malloc(DMX_ANC_BUFFSIZE);

257 if (!s->anc_buffer) {

258 av_log(avctx, AV_LOG_ERROR, "Unable to allocate ancillary buffer for the decoder\n");

259 ret = AVERROR(ENOMEM);

260 goto fail;

261 }

262 if (aacDecoder_AncDataInit(s->handle, s->anc_buffer, DMX_ANC_BUFFSIZE)) {

263 av_log(avctx, AV_LOG_ERROR, "Unable to register downmix ancillary buffer in the decoder\n");

264 ret = AVERROR_UNKNOWN;

265 goto fail;

266 }

267 }

268 }

269 }

270

271 if (s->drc_boost != -1) {

272 if (aacDecoder_SetParam(s->handle, AAC_DRC_BOOST_FACTOR, s->drc_boost) != AAC_DEC_OK) {

273 av_log(avctx, AV_LOG_ERROR, "Unable to set DRC boost factor in the decoder\n");

274 return AVERROR_UNKNOWN;

275 }

276 }

277

278 if (s->drc_cut != -1) {

279 if (aacDecoder_SetParam(s->handle, AAC_DRC_ATTENUATION_FACTOR, s->drc_cut) != AAC_DEC_OK) {

280 av_log(avctx, AV_LOG_ERROR, "Unable to set DRC attenuation factor in the decoder\n");

281 return AVERROR_UNKNOWN;

282 }

283 }

284

285 if (s->drc_level != -1) {

286 if (aacDecoder_SetParam(s->handle, AAC_DRC_REFERENCE_LEVEL, s->drc_level) != AAC_DEC_OK) {

287 av_log(avctx, AV_LOG_ERROR, "Unable to set DRC reference level in the decoder\n");

288 return AVERROR_UNKNOWN;

289 }

290 }

291

292 if (s->drc_heavy != -1) {

293 if (aacDecoder_SetParam(s->handle, AAC_DRC_HEAVY_COMPRESSION, s->drc_heavy) != AAC_DEC_OK) {

294 av_log(avctx, AV_LOG_ERROR, "Unable to set DRC heavy compression in the decoder\n");

295 return AVERROR_UNKNOWN;

296 }

297 }

298

299 #ifdef AACDECODER_LIB_VL0

300 if (aacDecoder_SetParam(s->handle, AAC_PCM_LIMITER_ENABLE, s->level_limit) != AAC_DEC_OK) {

301 av_log(avctx, AV_LOG_ERROR, "Unable to set in signal level limiting in the decoder\n");

302 return AVERROR_UNKNOWN;

303 }

304 #endif

305

306 avctx->sample_fmt = AV_SAMPLE_FMT_S16;

307

308 return 0;

309 fail:

310 fdk_aac_decode_close(avctx);

311 return ret;

312 }

313

314 static int fdk_aac_decode_frame(AVCodecContext *avctx, void *data,

315 int *got_frame_ptr, AVPacket *avpkt)

316 {

317 FDKAACDecContext *s = avctx->priv_data;

318 AVFrame *frame = data;

319 int ret;

320 AAC_DECODER_ERROR err;

321 UINT valid = avpkt->size;

322 uint8_t *buf, *tmpptr = NULL;

323 int buf_size;

324

325 err = aacDecoder_Fill(s->handle, &avpkt->data, &avpkt->size, &valid);

326 if (err != AAC_DEC_OK) {

327 av_log(avctx, AV_LOG_ERROR, "aacDecoder_Fill() failed: %x\n", err);

328 return AVERROR_INVALIDDATA;

329 }

330

331 if (s->initialized) {

332 frame->nb_samples = avctx->frame_size;

333 if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)

334 return ret;

335

336 if (s->anc_buffer) {

337 buf_size = DECODER_BUFFSIZE * DECODER_MAX_CHANNELS;

338 buf = s->decoder_buffer;

339 } else {

340 buf = frame->extended_data[0];

341 buf_size = avctx->channels * frame->nb_samples *

342 av_get_bytes_per_sample(avctx->sample_fmt);

343 }

344 } else {

345 buf_size = DECODER_BUFFSIZE * DECODER_MAX_CHANNELS;

346

347 if (!s->decoder_buffer)

348 s->decoder_buffer = av_malloc(buf_size);

349 if (!s->decoder_buffer)

350 return AVERROR(ENOMEM);

351

352 buf = tmpptr = s->decoder_buffer;

353 }

354

355 err = aacDecoder_DecodeFrame(s->handle, (INT_PCM *) buf, buf_size, 0);

356 if (err == AAC_DEC_NOT_ENOUGH_BITS) {

357 ret = avpkt->size - valid;

358 goto end;

359 }

360 if (err != AAC_DEC_OK) {

361 av_log(avctx, AV_LOG_ERROR,

362 "aacDecoder_DecodeFrame() failed: %x\n", err);

363 ret = AVERROR_UNKNOWN;

364 goto end;

365 }

366

367 if (!s->initialized) {

368 if ((ret = get_stream_info(avctx)) < 0)

369 goto end;

370 s->initialized = 1;

371 frame->nb_samples = avctx->frame_size;

372 }

373

374 if (tmpptr) {

375 frame->nb_samples = avctx->frame_size;

376 if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)

377 goto end;

378 }

379 if (s->decoder_buffer) {

380 memcpy(frame->extended_data[0], buf,

381 avctx->channels * avctx->frame_size *

382 av_get_bytes_per_sample(avctx->sample_fmt));

383

384 if (!s->anc_buffer)

385 av_freep(&s->decoder_buffer);

386 }

387

388 *got_frame_ptr = 1;

389 ret = avpkt->size - valid;

390

391 end:

392 return ret;

393 }

394

395 static av_cold void fdk_aac_decode_flush(AVCodecContext *avctx)

396 {

397 FDKAACDecContext *s = avctx->priv_data;

398 AAC_DECODER_ERROR err;

399

400 if (!s->handle)

401 return;

402

403 if ((err = aacDecoder_SetParam(s->handle,

404 AAC_TPDEC_CLEAR_BUFFER, 1)) != AAC_DEC_OK)

405 av_log(avctx, AV_LOG_WARNING, "failed to clear buffer when flushing\n");

406 }

407

408 AVCodec ff_libfdk_aac_decoder = {

409 .name = "libfdk_aac",

410 .long_name = NULL_IF_CONFIG_SMALL("Fraunhofer FDK AAC"),

411 .type = AVMEDIA_TYPE_AUDIO,

412 .id = AV_CODEC_ID_AAC,

413 .priv_data_size = sizeof(FDKAACDecContext),

414 .init = fdk_aac_decode_init,

415 .decode = fdk_aac_decode_frame,

416 .close = fdk_aac_decode_close,

417 .flush = fdk_aac_decode_flush,

418 .capabilities = CODEC_CAP_DR1 | CODEC_CAP_CHANNEL_CONF,

419 .priv_class = &fdk_aac_dec_class,

420 };

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