mirror of
https://git.ffmpeg.org/ffmpeg.git
synced 2024-12-25 16:52:31 +00:00
1e7d2007c3
Makes it robust against adding fields before it, which will be useful in
following commits.
Majority of the patch generated by the following Coccinelle script:
@@
typedef AVOption;
identifier arr_name;
initializer list il;
initializer list[8] il1;
expression tail;
@@
AVOption arr_name[] = { il, { il1,
- tail
+ .unit = tail
}, ... };
with some manual changes, as the script:
* has trouble with options defined inside macros
* sometimes does not handle options under an #else branch
* sometimes swallows whitespace
100 lines
4.4 KiB
C
100 lines
4.4 KiB
C
/*
|
|
* AC-3 Audio Decoder
|
|
* This code was developed as part of Google Summer of Code 2006.
|
|
* E-AC-3 support was added as part of Google Summer of Code 2007.
|
|
*
|
|
* Copyright (c) 2006 Kartikey Mahendra BHATT (bhattkm at gmail dot com)
|
|
* Copyright (c) 2007-2008 Bartlomiej Wolowiec <bartek.wolowiec@gmail.com>
|
|
* Copyright (c) 2007 Justin Ruggles <justin.ruggles@gmail.com>
|
|
*
|
|
* 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
|
|
*/
|
|
|
|
/**
|
|
* Upmix delay samples from stereo to original channel layout.
|
|
*/
|
|
|
|
#include "config_components.h"
|
|
#define IMDCT_TYPE AV_TX_FLOAT_MDCT
|
|
|
|
#include "ac3dec.h"
|
|
#include "codec_internal.h"
|
|
#include "profiles.h"
|
|
#include "eac3dec.c"
|
|
#include "ac3dec.c"
|
|
|
|
static const AVOption options[] = {
|
|
{ "cons_noisegen", "enable consistent noise generation", OFFSET(consistent_noise_generation), AV_OPT_TYPE_BOOL, {.i64 = 0 }, 0, 1, PAR },
|
|
{ "drc_scale", "percentage of dynamic range compression to apply", OFFSET(drc_scale), AV_OPT_TYPE_FLOAT, {.dbl = 1.0}, 0.0, 6.0, PAR },
|
|
{ "heavy_compr", "enable heavy dynamic range compression", OFFSET(heavy_compression), AV_OPT_TYPE_BOOL, {.i64 = 0 }, 0, 1, PAR },
|
|
{ "target_level", "target level in -dBFS (0 not applied)", OFFSET(target_level), AV_OPT_TYPE_INT, {.i64 = 0 }, -31, 0, PAR },
|
|
|
|
{"dmix_mode", "Preferred Stereo Downmix Mode", OFFSET(preferred_stereo_downmix), AV_OPT_TYPE_INT, {.i64 = -1 }, -1, 2, 0, .unit = "dmix_mode"},
|
|
{"ltrt_cmixlev", "Lt/Rt Center Mix Level", OFFSET(ltrt_center_mix_level), AV_OPT_TYPE_FLOAT, {.dbl = -1.0 }, -1.0, 2.0, 0},
|
|
{"ltrt_surmixlev", "Lt/Rt Surround Mix Level", OFFSET(ltrt_surround_mix_level), AV_OPT_TYPE_FLOAT, {.dbl = -1.0 }, -1.0, 2.0, 0},
|
|
{"loro_cmixlev", "Lo/Ro Center Mix Level", OFFSET(loro_center_mix_level), AV_OPT_TYPE_FLOAT, {.dbl = -1.0 }, -1.0, 2.0, 0},
|
|
{"loro_surmixlev", "Lo/Ro Surround Mix Level", OFFSET(loro_surround_mix_level), AV_OPT_TYPE_FLOAT, {.dbl = -1.0 }, -1.0, 2.0, 0},
|
|
|
|
{ "downmix", "Request a specific channel layout from the decoder", OFFSET(downmix_layout), AV_OPT_TYPE_CHLAYOUT, {.str = NULL}, .flags = PAR },
|
|
|
|
{ NULL},
|
|
};
|
|
|
|
static const AVClass ac3_eac3_decoder_class = {
|
|
.class_name = "(E-)AC3 decoder",
|
|
.item_name = av_default_item_name,
|
|
.option = options,
|
|
.version = LIBAVUTIL_VERSION_INT,
|
|
};
|
|
|
|
const FFCodec ff_ac3_decoder = {
|
|
.p.name = "ac3",
|
|
.p.type = AVMEDIA_TYPE_AUDIO,
|
|
.p.id = AV_CODEC_ID_AC3,
|
|
.priv_data_size = sizeof (AC3DecodeContext),
|
|
.init = ac3_decode_init,
|
|
.close = ac3_decode_end,
|
|
FF_CODEC_DECODE_CB(ac3_decode_frame),
|
|
.p.capabilities = AV_CODEC_CAP_CHANNEL_CONF |
|
|
AV_CODEC_CAP_DR1,
|
|
CODEC_LONG_NAME("ATSC A/52A (AC-3)"),
|
|
.p.sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_FLTP,
|
|
AV_SAMPLE_FMT_NONE },
|
|
.p.priv_class = &ac3_eac3_decoder_class,
|
|
.caps_internal = FF_CODEC_CAP_INIT_CLEANUP,
|
|
};
|
|
|
|
#if CONFIG_EAC3_DECODER
|
|
const FFCodec ff_eac3_decoder = {
|
|
.p.name = "eac3",
|
|
.p.type = AVMEDIA_TYPE_AUDIO,
|
|
.p.id = AV_CODEC_ID_EAC3,
|
|
.priv_data_size = sizeof (AC3DecodeContext),
|
|
.init = ac3_decode_init,
|
|
.close = ac3_decode_end,
|
|
FF_CODEC_DECODE_CB(ac3_decode_frame),
|
|
.p.capabilities = AV_CODEC_CAP_CHANNEL_CONF |
|
|
AV_CODEC_CAP_DR1,
|
|
CODEC_LONG_NAME("ATSC A/52B (AC-3, E-AC-3)"),
|
|
.p.sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_FLTP,
|
|
AV_SAMPLE_FMT_NONE },
|
|
.p.priv_class = &ac3_eac3_decoder_class,
|
|
.p.profiles = NULL_IF_CONFIG_SMALL(ff_eac3_profiles),
|
|
.caps_internal = FF_CODEC_CAP_INIT_CLEANUP,
|
|
};
|
|
#endif
|