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path: root/libavcodec/libfdk-aacdec.c (plain)
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1/*
2 * AAC decoder 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/aacdecoder_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 "internal.h"
27
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
33
34enum ConcealMethod {
35 CONCEAL_METHOD_SPECTRAL_MUTING = 0,
36 CONCEAL_METHOD_NOISE_SUBSTITUTION = 1,
37 CONCEAL_METHOD_ENERGY_INTERPOLATION = 2,
38 CONCEAL_METHOD_NB,
39};
40
41typedef struct FDKAACDecContext {
42 const AVClass *class;
43 HANDLE_AACDECODER handle;
44 uint8_t *decoder_buffer;
45 int decoder_buffer_size;
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;
54
55
56#define DMX_ANC_BUFFSIZE 128
57#define DECODER_MAX_CHANNELS 8
58#define DECODER_BUFFSIZE 2048 * sizeof(INT_PCM)
59
60#define OFFSET(x) offsetof(FDKAACDecContext, x)
61#define AD AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_DECODING_PARAM
62static 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};
80
81static const AVClass fdk_aac_dec_class = {
82 "libfdk-aac decoder", av_default_item_name, fdk_aac_dec_options, LIBAVUTIL_VERSION_INT
83};
84
85static 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;
92
93 if (!info) {
94 av_log(avctx, AV_LOG_ERROR, "Unable to get stream info\n");
95 return AVERROR_UNKNOWN;
96 }
97
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
196static 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
208static av_cold int fdk_aac_decode_init(AVCodecContext *avctx)
209{
210 FDKAACDecContext *s = avctx->priv_data;
211 AAC_DECODER_ERROR err;
212
213 s->handle = aacDecoder_Open(avctx->extradata_size ? TT_MP4_RAW : TT_MP4_ADTS, 1);
214 if (!s->handle) {
215 av_log(avctx, AV_LOG_ERROR, "Error opening decoder\n");
216 return AVERROR_UNKNOWN;
217 }
218
219 if (avctx->extradata_size) {
220 if ((err = aacDecoder_ConfigRaw(s->handle, &avctx->extradata,
221 &avctx->extradata_size)) != AAC_DEC_OK) {
222 av_log(avctx, AV_LOG_ERROR, "Unable to set extradata\n");
223 return AVERROR_INVALIDDATA;
224 }
225 }
226
227 if ((err = aacDecoder_SetParam(s->handle, AAC_CONCEAL_METHOD,
228 s->conceal_method)) != AAC_DEC_OK) {
229 av_log(avctx, AV_LOG_ERROR, "Unable to set error concealment method\n");
230 return AVERROR_UNKNOWN;
231 }
232
233 if (avctx->request_channel_layout > 0 &&
234 avctx->request_channel_layout != AV_CH_LAYOUT_NATIVE) {
235 int downmix_channels = -1;
236
237 switch (avctx->request_channel_layout) {
238 case AV_CH_LAYOUT_STEREO:
239 case AV_CH_LAYOUT_STEREO_DOWNMIX:
240 downmix_channels = 2;
241 break;
242 case AV_CH_LAYOUT_MONO:
243 downmix_channels = 1;
244 break;
245 default:
246 av_log(avctx, AV_LOG_WARNING, "Invalid request_channel_layout\n");
247 break;
248 }
249
250 if (downmix_channels != -1) {
251 if (aacDecoder_SetParam(s->handle, AAC_PCM_MAX_OUTPUT_CHANNELS,
252 downmix_channels) != AAC_DEC_OK) {
253 av_log(avctx, AV_LOG_WARNING, "Unable to set output channels in the decoder\n");
254 } else {
255 s->anc_buffer = av_malloc(DMX_ANC_BUFFSIZE);
256 if (!s->anc_buffer) {
257 av_log(avctx, AV_LOG_ERROR, "Unable to allocate ancillary buffer for the decoder\n");
258 return AVERROR(ENOMEM);
259 }
260 if (aacDecoder_AncDataInit(s->handle, s->anc_buffer, DMX_ANC_BUFFSIZE)) {
261 av_log(avctx, AV_LOG_ERROR, "Unable to register downmix ancillary buffer in the decoder\n");
262 return AVERROR_UNKNOWN;
263 }
264 }
265 }
266 }
267
268 if (s->drc_boost != -1) {
269 if (aacDecoder_SetParam(s->handle, AAC_DRC_BOOST_FACTOR, s->drc_boost) != AAC_DEC_OK) {
270 av_log(avctx, AV_LOG_ERROR, "Unable to set DRC boost factor in the decoder\n");
271 return AVERROR_UNKNOWN;
272 }
273 }
274
275 if (s->drc_cut != -1) {
276 if (aacDecoder_SetParam(s->handle, AAC_DRC_ATTENUATION_FACTOR, s->drc_cut) != AAC_DEC_OK) {
277 av_log(avctx, AV_LOG_ERROR, "Unable to set DRC attenuation factor in the decoder\n");
278 return AVERROR_UNKNOWN;
279 }
280 }
281
282 if (s->drc_level != -1) {
283 if (aacDecoder_SetParam(s->handle, AAC_DRC_REFERENCE_LEVEL, s->drc_level) != AAC_DEC_OK) {
284 av_log(avctx, AV_LOG_ERROR, "Unable to set DRC reference level in the decoder\n");
285 return AVERROR_UNKNOWN;
286 }
287 }
288
289 if (s->drc_heavy != -1) {
290 if (aacDecoder_SetParam(s->handle, AAC_DRC_HEAVY_COMPRESSION, s->drc_heavy) != AAC_DEC_OK) {
291 av_log(avctx, AV_LOG_ERROR, "Unable to set DRC heavy compression in the decoder\n");
292 return AVERROR_UNKNOWN;
293 }
294 }
295
296#ifdef AACDECODER_LIB_VL0
297 if (aacDecoder_SetParam(s->handle, AAC_PCM_LIMITER_ENABLE, s->level_limit) != AAC_DEC_OK) {
298 av_log(avctx, AV_LOG_ERROR, "Unable to set in signal level limiting in the decoder\n");
299 return AVERROR_UNKNOWN;
300 }
301#endif
302
303 avctx->sample_fmt = AV_SAMPLE_FMT_S16;
304
305 s->decoder_buffer_size = DECODER_BUFFSIZE * DECODER_MAX_CHANNELS;
306 s->decoder_buffer = av_malloc(s->decoder_buffer_size);
307 if (!s->decoder_buffer)
308 return AVERROR(ENOMEM);
309
310 return 0;
311}
312
313static int fdk_aac_decode_frame(AVCodecContext *avctx, void *data,
314 int *got_frame_ptr, AVPacket *avpkt)
315{
316 FDKAACDecContext *s = avctx->priv_data;
317 AVFrame *frame = data;
318 int ret;
319 AAC_DECODER_ERROR err;
320 UINT valid = avpkt->size;
321
322 err = aacDecoder_Fill(s->handle, &avpkt->data, &avpkt->size, &valid);
323 if (err != AAC_DEC_OK) {
324 av_log(avctx, AV_LOG_ERROR, "aacDecoder_Fill() failed: %x\n", err);
325 return AVERROR_INVALIDDATA;
326 }
327
328 err = aacDecoder_DecodeFrame(s->handle, (INT_PCM *) s->decoder_buffer, s->decoder_buffer_size, 0);
329 if (err == AAC_DEC_NOT_ENOUGH_BITS) {
330 ret = avpkt->size - valid;
331 goto end;
332 }
333 if (err != AAC_DEC_OK) {
334 av_log(avctx, AV_LOG_ERROR,
335 "aacDecoder_DecodeFrame() failed: %x\n", err);
336 ret = AVERROR_UNKNOWN;
337 goto end;
338 }
339
340 if ((ret = get_stream_info(avctx)) < 0)
341 goto end;
342 frame->nb_samples = avctx->frame_size;
343
344 if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
345 goto end;
346
347 memcpy(frame->extended_data[0], s->decoder_buffer,
348 avctx->channels * avctx->frame_size *
349 av_get_bytes_per_sample(avctx->sample_fmt));
350
351 *got_frame_ptr = 1;
352 ret = avpkt->size - valid;
353
354end:
355 return ret;
356}
357
358static av_cold void fdk_aac_decode_flush(AVCodecContext *avctx)
359{
360 FDKAACDecContext *s = avctx->priv_data;
361 AAC_DECODER_ERROR err;
362
363 if (!s->handle)
364 return;
365
366 if ((err = aacDecoder_SetParam(s->handle,
367 AAC_TPDEC_CLEAR_BUFFER, 1)) != AAC_DEC_OK)
368 av_log(avctx, AV_LOG_WARNING, "failed to clear buffer when flushing\n");
369}
370
371AVCodec ff_libfdk_aac_decoder = {
372 .name = "libfdk_aac",
373 .long_name = NULL_IF_CONFIG_SMALL("Fraunhofer FDK AAC"),
374 .type = AVMEDIA_TYPE_AUDIO,
375 .id = AV_CODEC_ID_AAC,
376 .priv_data_size = sizeof(FDKAACDecContext),
377 .init = fdk_aac_decode_init,
378 .decode = fdk_aac_decode_frame,
379 .close = fdk_aac_decode_close,
380 .flush = fdk_aac_decode_flush,
381 .capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_CHANNEL_CONF,
382 .priv_class = &fdk_aac_dec_class,
383 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE |
384 FF_CODEC_CAP_INIT_CLEANUP,
385};
386
generated by cgit at 2024-05-17 06:58:30 (GMT)