3 * This code was developed as part of Google Summer of Code 2006.
4 * E-AC-3 support was added as part of Google Summer of Code 2007.
6 * Copyright (c) 2006 Kartikey Mahendra BHATT (bhattkm at gmail dot com)
7 * Copyright (c) 2007-2008 Bartlomiej Wolowiec <bartek.wolowiec@gmail.com>
8 * Copyright (c) 2007 Justin Ruggles <justin.ruggles@gmail.com>
10 * This file is part of FFmpeg.
12 * FFmpeg is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU Lesser General Public
14 * License as published by the Free Software Foundation; either
15 * version 2.1 of the License, or (at your option) any later version.
17 * FFmpeg is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
20 * Lesser General Public License for more details.
22 * You should have received a copy of the GNU Lesser General Public
23 * License along with FFmpeg; if not, write to the Free Software
24 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
28 * Upmix delay samples from stereo to original channel layout.
33 static const AVOption options
[] = {
34 { "drc_scale", "percentage of dynamic range compression to apply", OFFSET(drc_scale
), AV_OPT_TYPE_FLOAT
, {.dbl
= 1.0}, 0.0, 6.0, PAR
},
35 { "heavy_compr", "heavy dynamic range compression enabled", OFFSET(heavy_compression
), AV_OPT_TYPE_INT
, {.i64
= 0 }, 0, 1, PAR
},
36 { "target_level", "target level in -dBFS (0 not applied)", OFFSET(target_level
), AV_OPT_TYPE_INT
, {.i64
= 0 }, -31, 0, PAR
},
38 {"dmix_mode", "Preferred Stereo Downmix Mode", OFFSET(preferred_stereo_downmix
), AV_OPT_TYPE_INT
, {.i64
= -1 }, -1, 2, 0, "dmix_mode"},
39 {"ltrt_cmixlev", "Lt/Rt Center Mix Level", OFFSET(ltrt_center_mix_level
), AV_OPT_TYPE_FLOAT
, {.dbl
= -1.0 }, -1.0, 2.0, 0},
40 {"ltrt_surmixlev", "Lt/Rt Surround Mix Level", OFFSET(ltrt_surround_mix_level
), AV_OPT_TYPE_FLOAT
, {.dbl
= -1.0 }, -1.0, 2.0, 0},
41 {"loro_cmixlev", "Lo/Ro Center Mix Level", OFFSET(loro_center_mix_level
), AV_OPT_TYPE_FLOAT
, {.dbl
= -1.0 }, -1.0, 2.0, 0},
42 {"loro_surmixlev", "Lo/Ro Surround Mix Level", OFFSET(loro_surround_mix_level
), AV_OPT_TYPE_FLOAT
, {.dbl
= -1.0 }, -1.0, 2.0, 0},
47 static const AVClass ac3_decoder_class
= {
48 .class_name
= "AC3 decoder",
49 .item_name
= av_default_item_name
,
51 .version
= LIBAVUTIL_VERSION_INT
,
54 AVCodec ff_ac3_decoder
= {
56 .type
= AVMEDIA_TYPE_AUDIO
,
57 .id
= AV_CODEC_ID_AC3
,
58 .priv_data_size
= sizeof (AC3DecodeContext
),
59 .init
= ac3_decode_init
,
60 .close
= ac3_decode_end
,
61 .decode
= ac3_decode_frame
,
62 .capabilities
= CODEC_CAP_DR1
,
63 .long_name
= NULL_IF_CONFIG_SMALL("ATSC A/52A (AC-3)"),
64 .sample_fmts
= (const enum AVSampleFormat
[]) { AV_SAMPLE_FMT_FLTP
,
66 .priv_class
= &ac3_decoder_class
,
69 #if CONFIG_EAC3_DECODER
70 static const AVClass eac3_decoder_class
= {
71 .class_name
= "E-AC3 decoder",
72 .item_name
= av_default_item_name
,
74 .version
= LIBAVUTIL_VERSION_INT
,
77 AVCodec ff_eac3_decoder
= {
79 .type
= AVMEDIA_TYPE_AUDIO
,
80 .id
= AV_CODEC_ID_EAC3
,
81 .priv_data_size
= sizeof (AC3DecodeContext
),
82 .init
= ac3_decode_init
,
83 .close
= ac3_decode_end
,
84 .decode
= ac3_decode_frame
,
85 .capabilities
= CODEC_CAP_DR1
,
86 .long_name
= NULL_IF_CONFIG_SMALL("ATSC A/52B (AC-3, E-AC-3)"),
87 .sample_fmts
= (const enum AVSampleFormat
[]) { AV_SAMPLE_FMT_FLTP
,
89 .priv_class
= &eac3_decoder_class
,