mirror of
https://git.ffmpeg.org/ffmpeg.git
synced 2024-12-22 07:20:45 +00:00
310 lines
10 KiB
C
310 lines
10 KiB
C
/*
|
|
* AAC decoder wrapper
|
|
* Copyright (c) 2012 Martin Storsjo
|
|
*
|
|
* This file is part of Libav.
|
|
*
|
|
* Libav is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2.1 of the License, or (at your option) any later version.
|
|
*
|
|
* Libav is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with Libav; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
#include <fdk-aac/aacdecoder_lib.h>
|
|
|
|
#include "libavutil/channel_layout.h"
|
|
#include "libavutil/common.h"
|
|
#include "libavutil/opt.h"
|
|
#include "avcodec.h"
|
|
#include "internal.h"
|
|
|
|
enum ConcealMethod {
|
|
CONCEAL_METHOD_DEFAULT = -1,
|
|
CONCEAL_METHOD_SPECTRAL_MUTING = 0,
|
|
CONCEAL_METHOD_NOISE_SUBSTITUTION = 1,
|
|
CONCEAL_METHOD_ENERGY_INTERPOLATION = 2,
|
|
CONCEAL_METHOD_NB,
|
|
};
|
|
|
|
typedef struct FDKAACDecContext {
|
|
const AVClass *class;
|
|
HANDLE_AACDECODER handle;
|
|
int initialized;
|
|
enum ConcealMethod conceal_method;
|
|
} FDKAACDecContext;
|
|
|
|
#define OFFSET(x) offsetof(FDKAACDecContext, x)
|
|
#define AD AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_DECODING_PARAM
|
|
static const AVOption fdk_aac_dec_options[] = {
|
|
{ "conceal", "Error concealment method", OFFSET(conceal_method), AV_OPT_TYPE_INT, { .i64 = CONCEAL_METHOD_DEFAULT }, CONCEAL_METHOD_DEFAULT, CONCEAL_METHOD_NB - 1, AD, "conceal" },
|
|
{ "default", "Default", 0, AV_OPT_TYPE_CONST, { .i64 = CONCEAL_METHOD_DEFAULT }, INT_MIN, INT_MAX, AD, "conceal" },
|
|
{ "spectral", "Spectral muting", 0, AV_OPT_TYPE_CONST, { .i64 = CONCEAL_METHOD_SPECTRAL_MUTING }, INT_MIN, INT_MAX, AD, "conceal" },
|
|
{ "noise", "Noise Substitution", 0, AV_OPT_TYPE_CONST, { .i64 = CONCEAL_METHOD_NOISE_SUBSTITUTION }, INT_MIN, INT_MAX, AD, "conceal" },
|
|
{ "energy", "Energy Interpolation", 0, AV_OPT_TYPE_CONST, { .i64 = CONCEAL_METHOD_ENERGY_INTERPOLATION }, INT_MIN, INT_MAX, AD, "conceal" },
|
|
{ NULL }
|
|
};
|
|
|
|
static const AVClass fdk_aac_dec_class = {
|
|
"libfdk-aac decoder", av_default_item_name, fdk_aac_dec_options, LIBAVUTIL_VERSION_INT
|
|
};
|
|
|
|
static int get_stream_info(AVCodecContext *avctx)
|
|
{
|
|
FDKAACDecContext *s = avctx->priv_data;
|
|
CStreamInfo *info = aacDecoder_GetStreamInfo(s->handle);
|
|
int channel_counts[9] = { 0 };
|
|
int i, ch_error = 0;
|
|
uint64_t ch_layout = 0;
|
|
|
|
if (!info) {
|
|
av_log(avctx, AV_LOG_ERROR, "Unable to get stream info\n");
|
|
return AVERROR_UNKNOWN;
|
|
}
|
|
|
|
if (info->sampleRate <= 0) {
|
|
av_log(avctx, AV_LOG_ERROR, "Stream info not initialized\n");
|
|
return AVERROR_UNKNOWN;
|
|
}
|
|
avctx->sample_rate = info->sampleRate;
|
|
avctx->frame_size = info->frameSize;
|
|
|
|
for (i = 0; i < info->numChannels; i++) {
|
|
AUDIO_CHANNEL_TYPE ctype = info->pChannelType[i];
|
|
if (ctype <= ACT_NONE || ctype > ACT_TOP) {
|
|
av_log(avctx, AV_LOG_WARNING, "unknown channel type\n");
|
|
break;
|
|
}
|
|
channel_counts[ctype]++;
|
|
}
|
|
av_log(avctx, AV_LOG_DEBUG,
|
|
"%d channels - front:%d side:%d back:%d lfe:%d top:%d\n",
|
|
info->numChannels,
|
|
channel_counts[ACT_FRONT], channel_counts[ACT_SIDE],
|
|
channel_counts[ACT_BACK], channel_counts[ACT_LFE],
|
|
channel_counts[ACT_FRONT_TOP] + channel_counts[ACT_SIDE_TOP] +
|
|
channel_counts[ACT_BACK_TOP] + channel_counts[ACT_TOP]);
|
|
|
|
switch (channel_counts[ACT_FRONT]) {
|
|
case 4:
|
|
ch_layout |= AV_CH_LAYOUT_STEREO | AV_CH_FRONT_LEFT_OF_CENTER |
|
|
AV_CH_FRONT_RIGHT_OF_CENTER;
|
|
break;
|
|
case 3:
|
|
ch_layout |= AV_CH_LAYOUT_STEREO | AV_CH_FRONT_CENTER;
|
|
break;
|
|
case 2:
|
|
ch_layout |= AV_CH_LAYOUT_STEREO;
|
|
break;
|
|
case 1:
|
|
ch_layout |= AV_CH_FRONT_CENTER;
|
|
break;
|
|
default:
|
|
av_log(avctx, AV_LOG_WARNING,
|
|
"unsupported number of front channels: %d\n",
|
|
channel_counts[ACT_FRONT]);
|
|
ch_error = 1;
|
|
break;
|
|
}
|
|
if (channel_counts[ACT_SIDE] > 0) {
|
|
if (channel_counts[ACT_SIDE] == 2) {
|
|
ch_layout |= AV_CH_SIDE_LEFT | AV_CH_SIDE_RIGHT;
|
|
} else {
|
|
av_log(avctx, AV_LOG_WARNING,
|
|
"unsupported number of side channels: %d\n",
|
|
channel_counts[ACT_SIDE]);
|
|
ch_error = 1;
|
|
}
|
|
}
|
|
if (channel_counts[ACT_BACK] > 0) {
|
|
switch (channel_counts[ACT_BACK]) {
|
|
case 3:
|
|
ch_layout |= AV_CH_BACK_LEFT | AV_CH_BACK_RIGHT | AV_CH_BACK_CENTER;
|
|
break;
|
|
case 2:
|
|
ch_layout |= AV_CH_BACK_LEFT | AV_CH_BACK_RIGHT;
|
|
break;
|
|
case 1:
|
|
ch_layout |= AV_CH_BACK_CENTER;
|
|
break;
|
|
default:
|
|
av_log(avctx, AV_LOG_WARNING,
|
|
"unsupported number of back channels: %d\n",
|
|
channel_counts[ACT_BACK]);
|
|
ch_error = 1;
|
|
break;
|
|
}
|
|
}
|
|
if (channel_counts[ACT_LFE] > 0) {
|
|
if (channel_counts[ACT_LFE] == 1) {
|
|
ch_layout |= AV_CH_LOW_FREQUENCY;
|
|
} else {
|
|
av_log(avctx, AV_LOG_WARNING,
|
|
"unsupported number of LFE channels: %d\n",
|
|
channel_counts[ACT_LFE]);
|
|
ch_error = 1;
|
|
}
|
|
}
|
|
if (!ch_error &&
|
|
av_get_channel_layout_nb_channels(ch_layout) != info->numChannels) {
|
|
av_log(avctx, AV_LOG_WARNING, "unsupported channel configuration\n");
|
|
ch_error = 1;
|
|
}
|
|
if (ch_error)
|
|
avctx->channel_layout = 0;
|
|
else
|
|
avctx->channel_layout = ch_layout;
|
|
|
|
avctx->channels = info->numChannels;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static av_cold int fdk_aac_decode_close(AVCodecContext *avctx)
|
|
{
|
|
FDKAACDecContext *s = avctx->priv_data;
|
|
|
|
if (s->handle)
|
|
aacDecoder_Close(s->handle);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static av_cold int fdk_aac_decode_init(AVCodecContext *avctx)
|
|
{
|
|
FDKAACDecContext *s = avctx->priv_data;
|
|
AAC_DECODER_ERROR err;
|
|
|
|
s->handle = aacDecoder_Open(avctx->extradata_size ? TT_MP4_RAW : TT_MP4_ADTS, 1);
|
|
if (!s->handle) {
|
|
av_log(avctx, AV_LOG_ERROR, "Error opening decoder\n");
|
|
return AVERROR_UNKNOWN;
|
|
}
|
|
|
|
if (avctx->extradata_size) {
|
|
if ((err = aacDecoder_ConfigRaw(s->handle, &avctx->extradata,
|
|
&avctx->extradata_size)) != AAC_DEC_OK) {
|
|
av_log(avctx, AV_LOG_ERROR, "Unable to set extradata\n");
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
}
|
|
|
|
if (s->conceal_method != CONCEAL_METHOD_DEFAULT) {
|
|
if ((err = aacDecoder_SetParam(s->handle, AAC_CONCEAL_METHOD,
|
|
s->conceal_method)) != AAC_DEC_OK) {
|
|
av_log(avctx, AV_LOG_ERROR, "Unable to set error concealment method\n");
|
|
return AVERROR_UNKNOWN;
|
|
}
|
|
}
|
|
|
|
avctx->sample_fmt = AV_SAMPLE_FMT_S16;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int fdk_aac_decode_frame(AVCodecContext *avctx, void *data,
|
|
int *got_frame_ptr, AVPacket *avpkt)
|
|
{
|
|
FDKAACDecContext *s = avctx->priv_data;
|
|
AVFrame *frame = data;
|
|
int ret;
|
|
AAC_DECODER_ERROR err;
|
|
UINT valid = avpkt->size;
|
|
uint8_t *buf, *tmpptr = NULL;
|
|
int buf_size;
|
|
|
|
err = aacDecoder_Fill(s->handle, &avpkt->data, &avpkt->size, &valid);
|
|
if (err != AAC_DEC_OK) {
|
|
av_log(avctx, AV_LOG_ERROR, "aacDecoder_Fill() failed: %x\n", err);
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
if (s->initialized) {
|
|
frame->nb_samples = avctx->frame_size;
|
|
if ((ret = ff_get_buffer(avctx, frame, 0)) < 0) {
|
|
av_log(avctx, AV_LOG_ERROR, "ff_get_buffer() failed\n");
|
|
return ret;
|
|
}
|
|
buf = frame->extended_data[0];
|
|
buf_size = avctx->channels * frame->nb_samples *
|
|
av_get_bytes_per_sample(avctx->sample_fmt);
|
|
} else {
|
|
buf_size = 50 * 1024;
|
|
buf = tmpptr = av_malloc(buf_size);
|
|
if (!buf)
|
|
return AVERROR(ENOMEM);
|
|
}
|
|
|
|
err = aacDecoder_DecodeFrame(s->handle, (INT_PCM *) buf, buf_size, 0);
|
|
if (err == AAC_DEC_NOT_ENOUGH_BITS) {
|
|
ret = avpkt->size - valid;
|
|
goto end;
|
|
}
|
|
if (err != AAC_DEC_OK) {
|
|
av_log(avctx, AV_LOG_ERROR,
|
|
"aacDecoder_DecodeFrame() failed: %x\n", err);
|
|
ret = AVERROR_UNKNOWN;
|
|
goto end;
|
|
}
|
|
|
|
if (!s->initialized) {
|
|
if ((ret = get_stream_info(avctx)) < 0)
|
|
goto end;
|
|
s->initialized = 1;
|
|
frame->nb_samples = avctx->frame_size;
|
|
}
|
|
|
|
if (tmpptr) {
|
|
frame->nb_samples = avctx->frame_size;
|
|
if ((ret = ff_get_buffer(avctx, frame, 0)) < 0) {
|
|
av_log(avctx, AV_LOG_ERROR, "ff_get_buffer() failed\n");
|
|
goto end;
|
|
}
|
|
memcpy(frame->extended_data[0], tmpptr,
|
|
avctx->channels * avctx->frame_size *
|
|
av_get_bytes_per_sample(avctx->sample_fmt));
|
|
}
|
|
|
|
*got_frame_ptr = 1;
|
|
ret = avpkt->size - valid;
|
|
|
|
end:
|
|
av_free(tmpptr);
|
|
return ret;
|
|
}
|
|
|
|
static av_cold void fdk_aac_decode_flush(AVCodecContext *avctx)
|
|
{
|
|
FDKAACDecContext *s = avctx->priv_data;
|
|
AAC_DECODER_ERROR err;
|
|
|
|
if (!s->handle)
|
|
return;
|
|
|
|
if ((err = aacDecoder_SetParam(s->handle,
|
|
AAC_TPDEC_CLEAR_BUFFER, 1)) != AAC_DEC_OK)
|
|
av_log(avctx, AV_LOG_WARNING, "failed to clear buffer when flushing\n");
|
|
}
|
|
|
|
AVCodec ff_libfdk_aac_decoder = {
|
|
.name = "libfdk_aac",
|
|
.long_name = NULL_IF_CONFIG_SMALL("Fraunhofer FDK AAC"),
|
|
.type = AVMEDIA_TYPE_AUDIO,
|
|
.id = AV_CODEC_ID_AAC,
|
|
.priv_data_size = sizeof(FDKAACDecContext),
|
|
.init = fdk_aac_decode_init,
|
|
.decode = fdk_aac_decode_frame,
|
|
.close = fdk_aac_decode_close,
|
|
.flush = fdk_aac_decode_flush,
|
|
.capabilities = CODEC_CAP_DR1,
|
|
.priv_class = &fdk_aac_dec_class,
|
|
};
|