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a247ac640d
Given that the AVCodec.next pointer has now been removed, most of the AVCodecs are not modified at all any more and can therefore be made const (as this patch does); the only exceptions are the very few codecs for external libraries that have a init_static_data callback. Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com> Signed-off-by: James Almer <jamrial@gmail.com>
98 lines
4.3 KiB
C
98 lines
4.3 KiB
C
/*
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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 "ac3dec.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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{ NULL},
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};
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static const AVClass ac3_decoder_class = {
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.class_name = "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 AVCodec ff_ac3_decoder = {
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.name = "ac3",
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.type = AVMEDIA_TYPE_AUDIO,
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.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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.decode = ac3_decode_frame,
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.capabilities = AV_CODEC_CAP_CHANNEL_CONF |
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AV_CODEC_CAP_DR1,
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.long_name = NULL_IF_CONFIG_SMALL("ATSC A/52A (AC-3)"),
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.sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_FLTP,
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AV_SAMPLE_FMT_NONE },
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.priv_class = &ac3_decoder_class,
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.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP,
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};
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#if CONFIG_EAC3_DECODER
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static const AVClass 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 AVCodec ff_eac3_decoder = {
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.name = "eac3",
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.type = AVMEDIA_TYPE_AUDIO,
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.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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.decode = ac3_decode_frame,
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.capabilities = AV_CODEC_CAP_CHANNEL_CONF |
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AV_CODEC_CAP_DR1,
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.long_name = NULL_IF_CONFIG_SMALL("ATSC A/52B (AC-3, E-AC-3)"),
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.sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_FLTP,
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AV_SAMPLE_FMT_NONE },
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.priv_class = &eac3_decoder_class,
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.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP,
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};
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#endif
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