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def97856de
Express bitfields more simply. Signed-off-by: Vittorio Giovara <vittorio.giovara@gmail.com>
425 lines
15 KiB
C
425 lines
15 KiB
C
/*
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* AAC decoder wrapper
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* Copyright (c) 2012 Martin Storsjo
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*
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* This file is part of Libav.
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include <fdk-aac/aacdecoder_lib.h>
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#include "libavutil/channel_layout.h"
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#include "libavutil/common.h"
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#include "libavutil/opt.h"
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#include "avcodec.h"
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#include "internal.h"
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/* The version macro is introduced the same time as the setting enum was
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* changed, so this check should suffice. */
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#ifndef AACDECODER_LIB_VL0
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#define AAC_PCM_MAX_OUTPUT_CHANNELS AAC_PCM_OUTPUT_CHANNELS
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#endif
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enum ConcealMethod {
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CONCEAL_METHOD_SPECTRAL_MUTING = 0,
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CONCEAL_METHOD_NOISE_SUBSTITUTION = 1,
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CONCEAL_METHOD_ENERGY_INTERPOLATION = 2,
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CONCEAL_METHOD_NB,
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};
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typedef struct FDKAACDecContext {
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const AVClass *class;
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HANDLE_AACDECODER handle;
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int initialized;
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uint8_t *decoder_buffer;
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uint8_t *anc_buffer;
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enum ConcealMethod conceal_method;
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int drc_level;
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int drc_boost;
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int drc_heavy;
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int drc_cut;
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int level_limit;
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} FDKAACDecContext;
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#define DMX_ANC_BUFFSIZE 128
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#define DECODER_MAX_CHANNELS 6
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#define DECODER_BUFFSIZE 2048 * sizeof(INT_PCM)
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#define OFFSET(x) offsetof(FDKAACDecContext, x)
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#define AD AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_DECODING_PARAM
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static const AVOption fdk_aac_dec_options[] = {
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{ "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" },
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{ "spectral", "Spectral muting", 0, AV_OPT_TYPE_CONST, { .i64 = CONCEAL_METHOD_SPECTRAL_MUTING }, INT_MIN, INT_MAX, AD, "conceal" },
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{ "noise", "Noise Substitution", 0, AV_OPT_TYPE_CONST, { .i64 = CONCEAL_METHOD_NOISE_SUBSTITUTION }, INT_MIN, INT_MAX, AD, "conceal" },
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{ "energy", "Energy Interpolation", 0, AV_OPT_TYPE_CONST, { .i64 = CONCEAL_METHOD_ENERGY_INTERPOLATION }, INT_MIN, INT_MAX, AD, "conceal" },
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{ "drc_boost", "Dynamic Range Control: boost, where [0] is none and [127] is max boost",
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OFFSET(drc_boost), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, 127, AD, NULL },
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{ "drc_cut", "Dynamic Range Control: attenuation factor, where [0] is none and [127] is max compression",
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OFFSET(drc_cut), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, 127, AD, NULL },
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{ "drc_level", "Dynamic Range Control: reference level, quantized to 0.25dB steps where [0] is 0dB and [127] is -31.75dB",
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OFFSET(drc_level), AV_OPT_TYPE_INT, { .i64 = -1}, -1, 127, AD, NULL },
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{ "drc_heavy", "Dynamic Range Control: heavy compression, where [1] is on (RF mode) and [0] is off",
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OFFSET(drc_heavy), AV_OPT_TYPE_INT, { .i64 = -1}, -1, 1, AD, NULL },
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#ifdef AACDECODER_LIB_VL0
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{ "level_limit", "Signal level limiting", OFFSET(level_limit), AV_OPT_TYPE_INT, { .i64 = 0 }, -1, 1, AD },
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#endif
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{ NULL }
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};
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static const AVClass fdk_aac_dec_class = {
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"libfdk-aac decoder", av_default_item_name, fdk_aac_dec_options, LIBAVUTIL_VERSION_INT
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};
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static int get_stream_info(AVCodecContext *avctx)
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{
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FDKAACDecContext *s = avctx->priv_data;
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CStreamInfo *info = aacDecoder_GetStreamInfo(s->handle);
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int channel_counts[0x24] = { 0 };
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int i, ch_error = 0;
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uint64_t ch_layout = 0;
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if (!info) {
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av_log(avctx, AV_LOG_ERROR, "Unable to get stream info\n");
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return AVERROR_UNKNOWN;
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}
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if (info->sampleRate <= 0) {
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av_log(avctx, AV_LOG_ERROR, "Stream info not initialized\n");
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return AVERROR_UNKNOWN;
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}
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avctx->sample_rate = info->sampleRate;
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avctx->frame_size = info->frameSize;
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for (i = 0; i < info->numChannels; i++) {
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AUDIO_CHANNEL_TYPE ctype = info->pChannelType[i];
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if (ctype <= ACT_NONE || ctype >= FF_ARRAY_ELEMS(channel_counts)) {
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av_log(avctx, AV_LOG_WARNING, "unknown channel type\n");
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break;
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}
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channel_counts[ctype]++;
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}
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av_log(avctx, AV_LOG_DEBUG,
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"%d channels - front:%d side:%d back:%d lfe:%d top:%d\n",
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info->numChannels,
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channel_counts[ACT_FRONT], channel_counts[ACT_SIDE],
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channel_counts[ACT_BACK], channel_counts[ACT_LFE],
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channel_counts[ACT_FRONT_TOP] + channel_counts[ACT_SIDE_TOP] +
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channel_counts[ACT_BACK_TOP] + channel_counts[ACT_TOP]);
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switch (channel_counts[ACT_FRONT]) {
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case 4:
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ch_layout |= AV_CH_LAYOUT_STEREO | AV_CH_FRONT_LEFT_OF_CENTER |
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AV_CH_FRONT_RIGHT_OF_CENTER;
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break;
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case 3:
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ch_layout |= AV_CH_LAYOUT_STEREO | AV_CH_FRONT_CENTER;
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break;
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case 2:
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ch_layout |= AV_CH_LAYOUT_STEREO;
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break;
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case 1:
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ch_layout |= AV_CH_FRONT_CENTER;
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break;
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default:
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av_log(avctx, AV_LOG_WARNING,
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"unsupported number of front channels: %d\n",
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channel_counts[ACT_FRONT]);
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ch_error = 1;
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break;
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}
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if (channel_counts[ACT_SIDE] > 0) {
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if (channel_counts[ACT_SIDE] == 2) {
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ch_layout |= AV_CH_SIDE_LEFT | AV_CH_SIDE_RIGHT;
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} else {
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av_log(avctx, AV_LOG_WARNING,
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"unsupported number of side channels: %d\n",
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channel_counts[ACT_SIDE]);
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ch_error = 1;
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}
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}
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if (channel_counts[ACT_BACK] > 0) {
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switch (channel_counts[ACT_BACK]) {
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case 3:
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ch_layout |= AV_CH_BACK_LEFT | AV_CH_BACK_RIGHT | AV_CH_BACK_CENTER;
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break;
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case 2:
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ch_layout |= AV_CH_BACK_LEFT | AV_CH_BACK_RIGHT;
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break;
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case 1:
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ch_layout |= AV_CH_BACK_CENTER;
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break;
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default:
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av_log(avctx, AV_LOG_WARNING,
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"unsupported number of back channels: %d\n",
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channel_counts[ACT_BACK]);
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ch_error = 1;
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break;
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}
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}
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if (channel_counts[ACT_LFE] > 0) {
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if (channel_counts[ACT_LFE] == 1) {
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ch_layout |= AV_CH_LOW_FREQUENCY;
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} else {
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av_log(avctx, AV_LOG_WARNING,
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"unsupported number of LFE channels: %d\n",
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channel_counts[ACT_LFE]);
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ch_error = 1;
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}
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}
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if (!ch_error &&
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av_get_channel_layout_nb_channels(ch_layout) != info->numChannels) {
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av_log(avctx, AV_LOG_WARNING, "unsupported channel configuration\n");
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ch_error = 1;
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}
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if (ch_error)
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avctx->channel_layout = 0;
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else
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avctx->channel_layout = ch_layout;
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avctx->channels = info->numChannels;
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return 0;
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}
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static av_cold int fdk_aac_decode_close(AVCodecContext *avctx)
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{
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FDKAACDecContext *s = avctx->priv_data;
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if (s->handle)
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aacDecoder_Close(s->handle);
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av_free(s->decoder_buffer);
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av_free(s->anc_buffer);
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return 0;
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}
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static av_cold int fdk_aac_decode_init(AVCodecContext *avctx)
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{
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FDKAACDecContext *s = avctx->priv_data;
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AAC_DECODER_ERROR err;
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int ret;
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s->handle = aacDecoder_Open(avctx->extradata_size ? TT_MP4_RAW : TT_MP4_ADTS, 1);
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if (!s->handle) {
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av_log(avctx, AV_LOG_ERROR, "Error opening decoder\n");
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return AVERROR_UNKNOWN;
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}
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if (avctx->extradata_size) {
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if ((err = aacDecoder_ConfigRaw(s->handle, &avctx->extradata,
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&avctx->extradata_size)) != AAC_DEC_OK) {
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av_log(avctx, AV_LOG_ERROR, "Unable to set extradata\n");
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return AVERROR_INVALIDDATA;
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}
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}
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if ((err = aacDecoder_SetParam(s->handle, AAC_CONCEAL_METHOD,
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s->conceal_method)) != AAC_DEC_OK) {
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av_log(avctx, AV_LOG_ERROR, "Unable to set error concealment method\n");
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return AVERROR_UNKNOWN;
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}
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if (avctx->request_channel_layout > 0 &&
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avctx->request_channel_layout != AV_CH_LAYOUT_NATIVE) {
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int downmix_channels = -1;
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switch (avctx->request_channel_layout) {
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case AV_CH_LAYOUT_STEREO:
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case AV_CH_LAYOUT_STEREO_DOWNMIX:
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downmix_channels = 2;
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break;
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case AV_CH_LAYOUT_MONO:
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downmix_channels = 1;
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break;
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default:
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av_log(avctx, AV_LOG_WARNING, "Invalid request_channel_layout\n");
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break;
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}
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if (downmix_channels != -1) {
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if (aacDecoder_SetParam(s->handle, AAC_PCM_MAX_OUTPUT_CHANNELS,
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downmix_channels) != AAC_DEC_OK) {
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av_log(avctx, AV_LOG_WARNING, "Unable to set output channels in the decoder\n");
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} else {
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s->anc_buffer = av_malloc(DMX_ANC_BUFFSIZE);
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if (!s->anc_buffer) {
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av_log(avctx, AV_LOG_ERROR, "Unable to allocate ancillary buffer for the decoder\n");
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ret = AVERROR(ENOMEM);
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goto fail;
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}
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if (aacDecoder_AncDataInit(s->handle, s->anc_buffer, DMX_ANC_BUFFSIZE)) {
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av_log(avctx, AV_LOG_ERROR, "Unable to register downmix ancillary buffer in the decoder\n");
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ret = AVERROR_UNKNOWN;
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goto fail;
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}
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}
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}
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}
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if (s->drc_boost != -1) {
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if (aacDecoder_SetParam(s->handle, AAC_DRC_BOOST_FACTOR, s->drc_boost) != AAC_DEC_OK) {
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av_log(avctx, AV_LOG_ERROR, "Unable to set DRC boost factor in the decoder\n");
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return AVERROR_UNKNOWN;
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}
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}
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if (s->drc_cut != -1) {
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if (aacDecoder_SetParam(s->handle, AAC_DRC_ATTENUATION_FACTOR, s->drc_cut) != AAC_DEC_OK) {
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av_log(avctx, AV_LOG_ERROR, "Unable to set DRC attenuation factor in the decoder\n");
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return AVERROR_UNKNOWN;
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}
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}
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if (s->drc_level != -1) {
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if (aacDecoder_SetParam(s->handle, AAC_DRC_REFERENCE_LEVEL, s->drc_level) != AAC_DEC_OK) {
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av_log(avctx, AV_LOG_ERROR, "Unable to set DRC reference level in the decoder\n");
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return AVERROR_UNKNOWN;
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}
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}
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if (s->drc_heavy != -1) {
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if (aacDecoder_SetParam(s->handle, AAC_DRC_HEAVY_COMPRESSION, s->drc_heavy) != AAC_DEC_OK) {
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av_log(avctx, AV_LOG_ERROR, "Unable to set DRC heavy compression in the decoder\n");
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return AVERROR_UNKNOWN;
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}
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}
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#ifdef AACDECODER_LIB_VL0
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if (aacDecoder_SetParam(s->handle, AAC_PCM_LIMITER_ENABLE, s->level_limit) != AAC_DEC_OK) {
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av_log(avctx, AV_LOG_ERROR, "Unable to set in signal level limiting in the decoder\n");
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return AVERROR_UNKNOWN;
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}
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#endif
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avctx->sample_fmt = AV_SAMPLE_FMT_S16;
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return 0;
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fail:
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fdk_aac_decode_close(avctx);
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return ret;
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}
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static int fdk_aac_decode_frame(AVCodecContext *avctx, void *data,
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int *got_frame_ptr, AVPacket *avpkt)
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{
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FDKAACDecContext *s = avctx->priv_data;
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AVFrame *frame = data;
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int ret;
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AAC_DECODER_ERROR err;
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UINT valid = avpkt->size;
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uint8_t *buf, *tmpptr = NULL;
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int buf_size;
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err = aacDecoder_Fill(s->handle, &avpkt->data, &avpkt->size, &valid);
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if (err != AAC_DEC_OK) {
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av_log(avctx, AV_LOG_ERROR, "aacDecoder_Fill() failed: %x\n", err);
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return AVERROR_INVALIDDATA;
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}
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if (s->initialized) {
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frame->nb_samples = avctx->frame_size;
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if ((ret = ff_get_buffer(avctx, frame, 0)) < 0) {
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av_log(avctx, AV_LOG_ERROR, "ff_get_buffer() failed\n");
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return ret;
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}
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if (s->anc_buffer) {
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buf_size = DECODER_BUFFSIZE * DECODER_MAX_CHANNELS;
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buf = s->decoder_buffer;
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} else {
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buf = frame->extended_data[0];
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buf_size = avctx->channels * frame->nb_samples *
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av_get_bytes_per_sample(avctx->sample_fmt);
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}
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} else {
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buf_size = DECODER_BUFFSIZE * DECODER_MAX_CHANNELS;
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if (!s->decoder_buffer)
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s->decoder_buffer = av_malloc(buf_size);
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if (!s->decoder_buffer)
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return AVERROR(ENOMEM);
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buf = tmpptr = s->decoder_buffer;
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}
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err = aacDecoder_DecodeFrame(s->handle, (INT_PCM *) buf, buf_size, 0);
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if (err == AAC_DEC_NOT_ENOUGH_BITS) {
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ret = avpkt->size - valid;
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goto end;
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}
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if (err != AAC_DEC_OK) {
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av_log(avctx, AV_LOG_ERROR,
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"aacDecoder_DecodeFrame() failed: %x\n", err);
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ret = AVERROR_UNKNOWN;
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goto end;
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}
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if (!s->initialized) {
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if ((ret = get_stream_info(avctx)) < 0)
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goto end;
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s->initialized = 1;
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frame->nb_samples = avctx->frame_size;
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}
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if (tmpptr) {
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frame->nb_samples = avctx->frame_size;
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if ((ret = ff_get_buffer(avctx, frame, 0)) < 0) {
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av_log(avctx, AV_LOG_ERROR, "ff_get_buffer() failed\n");
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goto end;
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}
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}
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if (s->decoder_buffer) {
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memcpy(frame->extended_data[0], buf,
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avctx->channels * avctx->frame_size *
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av_get_bytes_per_sample(avctx->sample_fmt));
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if (!s->anc_buffer)
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av_freep(&s->decoder_buffer);
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}
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*got_frame_ptr = 1;
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ret = avpkt->size - valid;
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end:
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return ret;
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}
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static av_cold void fdk_aac_decode_flush(AVCodecContext *avctx)
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{
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FDKAACDecContext *s = avctx->priv_data;
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AAC_DECODER_ERROR err;
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if (!s->handle)
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return;
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if ((err = aacDecoder_SetParam(s->handle,
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AAC_TPDEC_CLEAR_BUFFER, 1)) != AAC_DEC_OK)
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av_log(avctx, AV_LOG_WARNING, "failed to clear buffer when flushing\n");
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}
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AVCodec ff_libfdk_aac_decoder = {
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.name = "libfdk_aac",
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.long_name = NULL_IF_CONFIG_SMALL("Fraunhofer FDK AAC"),
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.type = AVMEDIA_TYPE_AUDIO,
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.id = AV_CODEC_ID_AAC,
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.priv_data_size = sizeof(FDKAACDecContext),
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.init = fdk_aac_decode_init,
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.decode = fdk_aac_decode_frame,
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.close = fdk_aac_decode_close,
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.flush = fdk_aac_decode_flush,
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.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_CHANNEL_CONF,
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.priv_class = &fdk_aac_dec_class,
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};
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