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.
34 static const AVOption options[] = {
35 { "drc_scale", "percentage of dynamic range compression to apply", OFFSET(drc_scale), AV_OPT_TYPE_FLOAT, {.dbl = 1.0}, 0.0, 6.0, PAR },
36 { "heavy_compr", "heavy dynamic range compression enabled", OFFSET(heavy_compression), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, 1, PAR },
37 { "target_level", "target level in -dBFS (0 not applied)", OFFSET(target_level), AV_OPT_TYPE_INT, {.i64 = 0 }, -31, 0, PAR },
39 {"dmix_mode", "Preferred Stereo Downmix Mode", OFFSET(preferred_stereo_downmix), AV_OPT_TYPE_INT, {.i64 = -1 }, -1, 2, 0, "dmix_mode"},
40 {"ltrt_cmixlev", "Lt/Rt Center Mix Level", OFFSET(ltrt_center_mix_level), AV_OPT_TYPE_FLOAT, {.dbl = -1.0 }, -1.0, 2.0, 0},
41 {"ltrt_surmixlev", "Lt/Rt Surround Mix Level", OFFSET(ltrt_surround_mix_level), AV_OPT_TYPE_FLOAT, {.dbl = -1.0 }, -1.0, 2.0, 0},
42 {"loro_cmixlev", "Lo/Ro Center Mix Level", OFFSET(loro_center_mix_level), AV_OPT_TYPE_FLOAT, {.dbl = -1.0 }, -1.0, 2.0, 0},
43 {"loro_surmixlev", "Lo/Ro Surround Mix Level", OFFSET(loro_surround_mix_level), AV_OPT_TYPE_FLOAT, {.dbl = -1.0 }, -1.0, 2.0, 0},
48 static const AVClass ac3_decoder_class = {
49 .class_name = "AC3 decoder",
50 .item_name = av_default_item_name,
52 .version = LIBAVUTIL_VERSION_INT,
55 AVCodec ff_ac3_decoder = {
57 .type = AVMEDIA_TYPE_AUDIO,
58 .id = AV_CODEC_ID_AC3,
59 .priv_data_size = sizeof (AC3DecodeContext),
60 .init = ac3_decode_init,
61 .close = ac3_decode_end,
62 .decode = ac3_decode_frame,
63 .capabilities = AV_CODEC_CAP_DR1,
64 .long_name = NULL_IF_CONFIG_SMALL("ATSC A/52A (AC-3)"),
65 .sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_FLTP,
67 .priv_class = &ac3_decoder_class,
70 #if CONFIG_EAC3_DECODER
71 static const AVClass eac3_decoder_class = {
72 .class_name = "E-AC3 decoder",
73 .item_name = av_default_item_name,
75 .version = LIBAVUTIL_VERSION_INT,
78 AVCodec ff_eac3_decoder = {
80 .type = AVMEDIA_TYPE_AUDIO,
81 .id = AV_CODEC_ID_EAC3,
82 .priv_data_size = sizeof (AC3DecodeContext),
83 .init = ac3_decode_init,
84 .close = ac3_decode_end,
85 .decode = ac3_decode_frame,
86 .capabilities = AV_CODEC_CAP_DR1,
87 .long_name = NULL_IF_CONFIG_SMALL("ATSC A/52B (AC-3, E-AC-3)"),
88 .sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_FLTP,
90 .priv_class = &eac3_decoder_class,