3 * Copyright (c) 2012 Martin Storsjo
5 * This file is part of FFmpeg.
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.
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.
20 #include <fdk-aac/aacdecoder_lib.h>
22 #include "libavutil/channel_layout.h"
23 #include "libavutil/common.h"
24 #include "libavutil/opt.h"
29 CONCEAL_METHOD_SPECTRAL_MUTING = 0,
30 CONCEAL_METHOD_NOISE_SUBSTITUTION = 1,
31 CONCEAL_METHOD_ENERGY_INTERPOLATION = 2,
35 typedef struct FDKAACDecContext {
37 HANDLE_AACDECODER handle;
39 enum ConcealMethod conceal_method;
42 #define OFFSET(x) offsetof(FDKAACDecContext, x)
43 #define AD AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_DECODING_PARAM
44 static const AVOption fdk_aac_dec_options[] = {
45 { "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" },
46 { "spectral", "Spectral muting", 0, AV_OPT_TYPE_CONST, { .i64 = CONCEAL_METHOD_SPECTRAL_MUTING }, INT_MIN, INT_MAX, AD, "conceal" },
47 { "noise", "Noise Substitution", 0, AV_OPT_TYPE_CONST, { .i64 = CONCEAL_METHOD_NOISE_SUBSTITUTION }, INT_MIN, INT_MAX, AD, "conceal" },
48 { "energy", "Energy Interpolation", 0, AV_OPT_TYPE_CONST, { .i64 = CONCEAL_METHOD_ENERGY_INTERPOLATION }, INT_MIN, INT_MAX, AD, "conceal" },
52 static const AVClass fdk_aac_dec_class = {
53 "libfdk-aac decoder", av_default_item_name, fdk_aac_dec_options, LIBAVUTIL_VERSION_INT
56 static int get_stream_info(AVCodecContext *avctx)
58 FDKAACDecContext *s = avctx->priv_data;
59 CStreamInfo *info = aacDecoder_GetStreamInfo(s->handle);
60 int channel_counts[9] = { 0 };
62 uint64_t ch_layout = 0;
65 av_log(avctx, AV_LOG_ERROR, "Unable to get stream info\n");
66 return AVERROR_UNKNOWN;
69 if (info->sampleRate <= 0) {
70 av_log(avctx, AV_LOG_ERROR, "Stream info not initialized\n");
71 return AVERROR_UNKNOWN;
73 avctx->sample_rate = info->sampleRate;
74 avctx->frame_size = info->frameSize;
76 for (i = 0; i < info->numChannels; i++) {
77 AUDIO_CHANNEL_TYPE ctype = info->pChannelType[i];
78 if (ctype <= ACT_NONE || ctype > ACT_TOP) {
79 av_log(avctx, AV_LOG_WARNING, "unknown channel type\n");
82 channel_counts[ctype]++;
84 av_log(avctx, AV_LOG_DEBUG,
85 "%d channels - front:%d side:%d back:%d lfe:%d top:%d\n",
87 channel_counts[ACT_FRONT], channel_counts[ACT_SIDE],
88 channel_counts[ACT_BACK], channel_counts[ACT_LFE],
89 channel_counts[ACT_FRONT_TOP] + channel_counts[ACT_SIDE_TOP] +
90 channel_counts[ACT_BACK_TOP] + channel_counts[ACT_TOP]);
92 switch (channel_counts[ACT_FRONT]) {
94 ch_layout |= AV_CH_LAYOUT_STEREO | AV_CH_FRONT_LEFT_OF_CENTER |
95 AV_CH_FRONT_RIGHT_OF_CENTER;
98 ch_layout |= AV_CH_LAYOUT_STEREO | AV_CH_FRONT_CENTER;
101 ch_layout |= AV_CH_LAYOUT_STEREO;
104 ch_layout |= AV_CH_FRONT_CENTER;
107 av_log(avctx, AV_LOG_WARNING,
108 "unsupported number of front channels: %d\n",
109 channel_counts[ACT_FRONT]);
113 if (channel_counts[ACT_SIDE] > 0) {
114 if (channel_counts[ACT_SIDE] == 2) {
115 ch_layout |= AV_CH_SIDE_LEFT | AV_CH_SIDE_RIGHT;
117 av_log(avctx, AV_LOG_WARNING,
118 "unsupported number of side channels: %d\n",
119 channel_counts[ACT_SIDE]);
123 if (channel_counts[ACT_BACK] > 0) {
124 switch (channel_counts[ACT_BACK]) {
126 ch_layout |= AV_CH_BACK_LEFT | AV_CH_BACK_RIGHT | AV_CH_BACK_CENTER;
129 ch_layout |= AV_CH_BACK_LEFT | AV_CH_BACK_RIGHT;
132 ch_layout |= AV_CH_BACK_CENTER;
135 av_log(avctx, AV_LOG_WARNING,
136 "unsupported number of back channels: %d\n",
137 channel_counts[ACT_BACK]);
142 if (channel_counts[ACT_LFE] > 0) {
143 if (channel_counts[ACT_LFE] == 1) {
144 ch_layout |= AV_CH_LOW_FREQUENCY;
146 av_log(avctx, AV_LOG_WARNING,
147 "unsupported number of LFE channels: %d\n",
148 channel_counts[ACT_LFE]);
153 av_get_channel_layout_nb_channels(ch_layout) != info->numChannels) {
154 av_log(avctx, AV_LOG_WARNING, "unsupported channel configuration\n");
158 avctx->channel_layout = 0;
160 avctx->channel_layout = ch_layout;
162 avctx->channels = info->numChannels;
167 static av_cold int fdk_aac_decode_close(AVCodecContext *avctx)
169 FDKAACDecContext *s = avctx->priv_data;
172 aacDecoder_Close(s->handle);
177 static av_cold int fdk_aac_decode_init(AVCodecContext *avctx)
179 FDKAACDecContext *s = avctx->priv_data;
180 AAC_DECODER_ERROR err;
182 s->handle = aacDecoder_Open(avctx->extradata_size ? TT_MP4_RAW : TT_MP4_ADTS, 1);
184 av_log(avctx, AV_LOG_ERROR, "Error opening decoder\n");
185 return AVERROR_UNKNOWN;
188 if (avctx->extradata_size) {
189 if ((err = aacDecoder_ConfigRaw(s->handle, &avctx->extradata,
190 &avctx->extradata_size)) != AAC_DEC_OK) {
191 av_log(avctx, AV_LOG_ERROR, "Unable to set extradata\n");
192 return AVERROR_INVALIDDATA;
196 if ((err = aacDecoder_SetParam(s->handle, AAC_CONCEAL_METHOD,
197 s->conceal_method)) != AAC_DEC_OK) {
198 av_log(avctx, AV_LOG_ERROR, "Unable to set error concealment method\n");
199 return AVERROR_UNKNOWN;
202 avctx->sample_fmt = AV_SAMPLE_FMT_S16;
207 static int fdk_aac_decode_frame(AVCodecContext *avctx, void *data,
208 int *got_frame_ptr, AVPacket *avpkt)
210 FDKAACDecContext *s = avctx->priv_data;
211 AVFrame *frame = data;
213 AAC_DECODER_ERROR err;
214 UINT valid = avpkt->size;
215 uint8_t *buf, *tmpptr = NULL;
218 err = aacDecoder_Fill(s->handle, &avpkt->data, &avpkt->size, &valid);
219 if (err != AAC_DEC_OK) {
220 av_log(avctx, AV_LOG_ERROR, "aacDecoder_Fill() failed: %x\n", err);
221 return AVERROR_INVALIDDATA;
224 if (s->initialized) {
225 frame->nb_samples = avctx->frame_size;
226 if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
228 buf = frame->extended_data[0];
229 buf_size = avctx->channels * frame->nb_samples *
230 av_get_bytes_per_sample(avctx->sample_fmt);
232 buf_size = 50 * 1024;
233 buf = tmpptr = av_malloc(buf_size);
235 return AVERROR(ENOMEM);
238 err = aacDecoder_DecodeFrame(s->handle, (INT_PCM *) buf, buf_size, 0);
239 if (err == AAC_DEC_NOT_ENOUGH_BITS) {
240 ret = avpkt->size - valid;
243 if (err != AAC_DEC_OK) {
244 av_log(avctx, AV_LOG_ERROR,
245 "aacDecoder_DecodeFrame() failed: %x\n", err);
246 ret = AVERROR_UNKNOWN;
250 if (!s->initialized) {
251 if ((ret = get_stream_info(avctx)) < 0)
254 frame->nb_samples = avctx->frame_size;
258 frame->nb_samples = avctx->frame_size;
259 if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
261 memcpy(frame->extended_data[0], tmpptr,
262 avctx->channels * avctx->frame_size *
263 av_get_bytes_per_sample(avctx->sample_fmt));
267 ret = avpkt->size - valid;
274 static av_cold void fdk_aac_decode_flush(AVCodecContext *avctx)
276 FDKAACDecContext *s = avctx->priv_data;
277 AAC_DECODER_ERROR err;
282 if ((err = aacDecoder_SetParam(s->handle,
283 AAC_TPDEC_CLEAR_BUFFER, 1)) != AAC_DEC_OK)
284 av_log(avctx, AV_LOG_WARNING, "failed to clear buffer when flushing\n");
287 AVCodec ff_libfdk_aac_decoder = {
288 .name = "libfdk_aac",
289 .long_name = NULL_IF_CONFIG_SMALL("Fraunhofer FDK AAC"),
290 .type = AVMEDIA_TYPE_AUDIO,
291 .id = AV_CODEC_ID_AAC,
292 .priv_data_size = sizeof(FDKAACDecContext),
293 .init = fdk_aac_decode_init,
294 .decode = fdk_aac_decode_frame,
295 .close = fdk_aac_decode_close,
296 .flush = fdk_aac_decode_flush,
297 .capabilities = CODEC_CAP_DR1 | CODEC_CAP_CHANNEL_CONF,
298 .priv_class = &fdk_aac_dec_class,