| /* |
| * AAC decoder wrapper |
| * Copyright (c) 2012 Martin Storsjo |
| * |
| * This file is part of FFmpeg. |
| * |
| * FFmpeg 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. |
| * |
| * FFmpeg 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 FFmpeg; 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) |
| 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) |
| 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, |
| }; |
