From 4f2b469da5e4ae221718ae479f6af627cfdebb91 Mon Sep 17 00:00:00 2001 From: Martin Storsjö Date: Thu, 15 Aug 2013 15:40:32 -0400 Subject: Add a libfdk-aac decoder This can be useful for decoding AAC object types that are not supported by the native AAC decoder, e.g. AAC-LD and AAC-ELD. --- libavcodec/libfdk-aacdec.c | 299 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 299 insertions(+) create mode 100644 libavcodec/libfdk-aacdec.c (limited to 'libavcodec/libfdk-aacdec.c') diff --git a/libavcodec/libfdk-aacdec.c b/libavcodec/libfdk-aacdec.c new file mode 100644 index 0000000000..201286f2d8 --- /dev/null +++ b/libavcodec/libfdk-aacdec.c @@ -0,0 +1,299 @@ +/* + * 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 + +#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, +}; -- cgit v1.2.3