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99 lines
4.4 KiB
99 lines
4.4 KiB
/* |
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* AC-3 Audio Decoder |
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* This code was developed as part of Google Summer of Code 2006. |
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* E-AC-3 support was added as part of Google Summer of Code 2007. |
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* |
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* Copyright (c) 2006 Kartikey Mahendra BHATT (bhattkm at gmail dot com) |
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* Copyright (c) 2007-2008 Bartlomiej Wolowiec <bartek.wolowiec@gmail.com> |
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* Copyright (c) 2007 Justin Ruggles <justin.ruggles@gmail.com> |
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* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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/** |
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* Upmix delay samples from stereo to original channel layout. |
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*/ |
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#include "config_components.h" |
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#define IMDCT_TYPE AV_TX_FLOAT_MDCT |
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#include "ac3dec.h" |
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#include "codec_internal.h" |
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#include "profiles.h" |
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#include "eac3dec.c" |
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#include "ac3dec.c" |
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static const AVOption options[] = { |
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{ "cons_noisegen", "enable consistent noise generation", OFFSET(consistent_noise_generation), AV_OPT_TYPE_BOOL, {.i64 = 0 }, 0, 1, PAR }, |
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{ "drc_scale", "percentage of dynamic range compression to apply", OFFSET(drc_scale), AV_OPT_TYPE_FLOAT, {.dbl = 1.0}, 0.0, 6.0, PAR }, |
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{ "heavy_compr", "enable heavy dynamic range compression", OFFSET(heavy_compression), AV_OPT_TYPE_BOOL, {.i64 = 0 }, 0, 1, PAR }, |
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{ "target_level", "target level in -dBFS (0 not applied)", OFFSET(target_level), AV_OPT_TYPE_INT, {.i64 = 0 }, -31, 0, PAR }, |
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{"dmix_mode", "Preferred Stereo Downmix Mode", OFFSET(preferred_stereo_downmix), AV_OPT_TYPE_INT, {.i64 = -1 }, -1, 2, 0, "dmix_mode"}, |
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{"ltrt_cmixlev", "Lt/Rt Center Mix Level", OFFSET(ltrt_center_mix_level), AV_OPT_TYPE_FLOAT, {.dbl = -1.0 }, -1.0, 2.0, 0}, |
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{"ltrt_surmixlev", "Lt/Rt Surround Mix Level", OFFSET(ltrt_surround_mix_level), AV_OPT_TYPE_FLOAT, {.dbl = -1.0 }, -1.0, 2.0, 0}, |
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{"loro_cmixlev", "Lo/Ro Center Mix Level", OFFSET(loro_center_mix_level), AV_OPT_TYPE_FLOAT, {.dbl = -1.0 }, -1.0, 2.0, 0}, |
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{"loro_surmixlev", "Lo/Ro Surround Mix Level", OFFSET(loro_surround_mix_level), AV_OPT_TYPE_FLOAT, {.dbl = -1.0 }, -1.0, 2.0, 0}, |
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{ "downmix", "Request a specific channel layout from the decoder", OFFSET(downmix_layout), AV_OPT_TYPE_CHLAYOUT, {.str = NULL}, .flags = PAR }, |
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{ NULL}, |
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}; |
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static const AVClass ac3_eac3_decoder_class = { |
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.class_name = "(E-)AC3 decoder", |
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.item_name = av_default_item_name, |
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.option = options, |
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.version = LIBAVUTIL_VERSION_INT, |
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}; |
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const FFCodec ff_ac3_decoder = { |
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.p.name = "ac3", |
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.p.type = AVMEDIA_TYPE_AUDIO, |
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.p.id = AV_CODEC_ID_AC3, |
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.priv_data_size = sizeof (AC3DecodeContext), |
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.init = ac3_decode_init, |
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.close = ac3_decode_end, |
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FF_CODEC_DECODE_CB(ac3_decode_frame), |
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.p.capabilities = AV_CODEC_CAP_CHANNEL_CONF | |
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AV_CODEC_CAP_DR1, |
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CODEC_LONG_NAME("ATSC A/52A (AC-3)"), |
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.p.sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_FLTP, |
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AV_SAMPLE_FMT_NONE }, |
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.p.priv_class = &ac3_eac3_decoder_class, |
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.caps_internal = FF_CODEC_CAP_INIT_CLEANUP, |
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}; |
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#if CONFIG_EAC3_DECODER |
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const FFCodec ff_eac3_decoder = { |
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.p.name = "eac3", |
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.p.type = AVMEDIA_TYPE_AUDIO, |
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.p.id = AV_CODEC_ID_EAC3, |
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.priv_data_size = sizeof (AC3DecodeContext), |
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.init = ac3_decode_init, |
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.close = ac3_decode_end, |
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FF_CODEC_DECODE_CB(ac3_decode_frame), |
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.p.capabilities = AV_CODEC_CAP_CHANNEL_CONF | |
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AV_CODEC_CAP_DR1, |
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CODEC_LONG_NAME("ATSC A/52B (AC-3, E-AC-3)"), |
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.p.sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_FLTP, |
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AV_SAMPLE_FMT_NONE }, |
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.p.priv_class = &ac3_eac3_decoder_class, |
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.p.profiles = NULL_IF_CONFIG_SMALL(ff_eac3_profiles), |
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.caps_internal = FF_CODEC_CAP_INIT_CLEANUP, |
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}; |
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#endif
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