| /* |
| * AAC decoder wrapper |
| * Copyright (c) 2012 Martin Storsjo |
| * |
| * This file is part of FFmpeg. |
| * |
| * Permission to use, copy, modify, and/or distribute this software for any |
| * purpose with or without fee is hereby granted, provided that the above |
| * copyright notice and this permission notice appear in all copies. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
| * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
| * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR |
| * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
| * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
| * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
| * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
| */ |
| |
| #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" |
| |
| /* The version macro is introduced the same time as the setting enum was |
| * changed, so this check should suffice. */ |
| #ifndef AACDECODER_LIB_VL0 |
| #define AAC_PCM_MAX_OUTPUT_CHANNELS AAC_PCM_OUTPUT_CHANNELS |
| #endif |
| |
| enum ConcealMethod { |
| 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; |
| uint8_t *decoder_buffer; |
| int decoder_buffer_size; |
| uint8_t *anc_buffer; |
| int conceal_method; |
| int drc_level; |
| int drc_boost; |
| int drc_heavy; |
| int drc_cut; |
| int level_limit; |
| } FDKAACDecContext; |
| |
| |
| #define DMX_ANC_BUFFSIZE 128 |
| #define DECODER_MAX_CHANNELS 8 |
| #define DECODER_BUFFSIZE 2048 * sizeof(INT_PCM) |
| |
| #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_NOISE_SUBSTITUTION }, CONCEAL_METHOD_SPECTRAL_MUTING, CONCEAL_METHOD_NB - 1, 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" }, |
| { "drc_boost", "Dynamic Range Control: boost, where [0] is none and [127] is max boost", |
| OFFSET(drc_boost), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, 127, AD, NULL }, |
| { "drc_cut", "Dynamic Range Control: attenuation factor, where [0] is none and [127] is max compression", |
| OFFSET(drc_cut), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, 127, AD, NULL }, |
| { "drc_level", "Dynamic Range Control: reference level, quantized to 0.25dB steps where [0] is 0dB and [127] is -31.75dB", |
| OFFSET(drc_level), AV_OPT_TYPE_INT, { .i64 = -1}, -1, 127, AD, NULL }, |
| { "drc_heavy", "Dynamic Range Control: heavy compression, where [1] is on (RF mode) and [0] is off", |
| OFFSET(drc_heavy), AV_OPT_TYPE_INT, { .i64 = -1}, -1, 1, AD, NULL }, |
| #ifdef AACDECODER_LIB_VL0 |
| { "level_limit", "Signal level limiting", OFFSET(level_limit), AV_OPT_TYPE_INT, { .i64 = 0 }, -1, 1, AD }, |
| #endif |
| { 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[0x24] = { 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 >= FF_ARRAY_ELEMS(channel_counts)) { |
| 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); |
| av_freep(&s->decoder_buffer); |
| av_freep(&s->anc_buffer); |
| |
| 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 ((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; |
| } |
| |
| if (avctx->request_channel_layout > 0 && |
| avctx->request_channel_layout != AV_CH_LAYOUT_NATIVE) { |
| int downmix_channels = -1; |
| |
| switch (avctx->request_channel_layout) { |
| case AV_CH_LAYOUT_STEREO: |
| case AV_CH_LAYOUT_STEREO_DOWNMIX: |
| downmix_channels = 2; |
| break; |
| case AV_CH_LAYOUT_MONO: |
| downmix_channels = 1; |
| break; |
| default: |
| av_log(avctx, AV_LOG_WARNING, "Invalid request_channel_layout\n"); |
| break; |
| } |
| |
| if (downmix_channels != -1) { |
| if (aacDecoder_SetParam(s->handle, AAC_PCM_MAX_OUTPUT_CHANNELS, |
| downmix_channels) != AAC_DEC_OK) { |
| av_log(avctx, AV_LOG_WARNING, "Unable to set output channels in the decoder\n"); |
| } else { |
| s->anc_buffer = av_malloc(DMX_ANC_BUFFSIZE); |
| if (!s->anc_buffer) { |
| av_log(avctx, AV_LOG_ERROR, "Unable to allocate ancillary buffer for the decoder\n"); |
| return AVERROR(ENOMEM); |
| } |
| if (aacDecoder_AncDataInit(s->handle, s->anc_buffer, DMX_ANC_BUFFSIZE)) { |
| av_log(avctx, AV_LOG_ERROR, "Unable to register downmix ancillary buffer in the decoder\n"); |
| return AVERROR_UNKNOWN; |
| } |
| } |
| } |
| } |
| |
| if (s->drc_boost != -1) { |
| if (aacDecoder_SetParam(s->handle, AAC_DRC_BOOST_FACTOR, s->drc_boost) != AAC_DEC_OK) { |
| av_log(avctx, AV_LOG_ERROR, "Unable to set DRC boost factor in the decoder\n"); |
| return AVERROR_UNKNOWN; |
| } |
| } |
| |
| if (s->drc_cut != -1) { |
| if (aacDecoder_SetParam(s->handle, AAC_DRC_ATTENUATION_FACTOR, s->drc_cut) != AAC_DEC_OK) { |
| av_log(avctx, AV_LOG_ERROR, "Unable to set DRC attenuation factor in the decoder\n"); |
| return AVERROR_UNKNOWN; |
| } |
| } |
| |
| if (s->drc_level != -1) { |
| if (aacDecoder_SetParam(s->handle, AAC_DRC_REFERENCE_LEVEL, s->drc_level) != AAC_DEC_OK) { |
| av_log(avctx, AV_LOG_ERROR, "Unable to set DRC reference level in the decoder\n"); |
| return AVERROR_UNKNOWN; |
| } |
| } |
| |
| if (s->drc_heavy != -1) { |
| if (aacDecoder_SetParam(s->handle, AAC_DRC_HEAVY_COMPRESSION, s->drc_heavy) != AAC_DEC_OK) { |
| av_log(avctx, AV_LOG_ERROR, "Unable to set DRC heavy compression in the decoder\n"); |
| return AVERROR_UNKNOWN; |
| } |
| } |
| |
| #ifdef AACDECODER_LIB_VL0 |
| if (aacDecoder_SetParam(s->handle, AAC_PCM_LIMITER_ENABLE, s->level_limit) != AAC_DEC_OK) { |
| av_log(avctx, AV_LOG_ERROR, "Unable to set in signal level limiting in the decoder\n"); |
| return AVERROR_UNKNOWN; |
| } |
| #endif |
| |
| avctx->sample_fmt = AV_SAMPLE_FMT_S16; |
| |
| s->decoder_buffer_size = DECODER_BUFFSIZE * DECODER_MAX_CHANNELS; |
| s->decoder_buffer = av_malloc(s->decoder_buffer_size); |
| if (!s->decoder_buffer) |
| return AVERROR(ENOMEM); |
| |
| 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; |
| |
| 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; |
| } |
| |
| err = aacDecoder_DecodeFrame(s->handle, (INT_PCM *) s->decoder_buffer, s->decoder_buffer_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 ((ret = get_stream_info(avctx)) < 0) |
| goto end; |
| frame->nb_samples = avctx->frame_size; |
| |
| if ((ret = ff_get_buffer(avctx, frame, 0)) < 0) |
| goto end; |
| |
| memcpy(frame->extended_data[0], s->decoder_buffer, |
| avctx->channels * avctx->frame_size * |
| av_get_bytes_per_sample(avctx->sample_fmt)); |
| |
| *got_frame_ptr = 1; |
| ret = avpkt->size - valid; |
| |
| end: |
| 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 = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_CHANNEL_CONF, |
| .priv_class = &fdk_aac_dec_class, |
| .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE | |
| FF_CODEC_CAP_INIT_CLEANUP, |
| }; |
