1/*
2 * AC-3 Audio Decoder
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.
5 *
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>
9 *
10 * This file is part of FFmpeg.
11 *
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.
16 *
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.
21 *
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
25 */
26
27/**
28 * Upmix delay samples from stereo to original channel layout.
29 */
30#include "ac3dec.h"
31#include "ac3dec.c"
32
33static 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
36{"dmix_mode", "Preferred Stereo Downmix Mode", OFFSET(preferred_stereo_downmix), AV_OPT_TYPE_INT, {.i64 = -1 }, -1, 2, 0, "dmix_mode"},
37{"ltrt_cmixlev",   "Lt/Rt Center Mix Level",   OFFSET(ltrt_center_mix_level),    AV_OPT_TYPE_FLOAT, {.dbl = -1.0 }, -1.0, 2.0, 0},
38{"ltrt_surmixlev", "Lt/Rt Surround Mix Level", OFFSET(ltrt_surround_mix_level),  AV_OPT_TYPE_FLOAT, {.dbl = -1.0 }, -1.0, 2.0, 0},
39{"loro_cmixlev",   "Lo/Ro Center Mix Level",   OFFSET(loro_center_mix_level),    AV_OPT_TYPE_FLOAT, {.dbl = -1.0 }, -1.0, 2.0, 0},
40{"loro_surmixlev", "Lo/Ro Surround Mix Level", OFFSET(loro_surround_mix_level),  AV_OPT_TYPE_FLOAT, {.dbl = -1.0 }, -1.0, 2.0, 0},
41
42    { NULL},
43};
44
45static const AVClass ac3_decoder_class = {
46    .class_name = "AC3 decoder",
47    .item_name  = av_default_item_name,
48    .option     = options,
49    .version    = LIBAVUTIL_VERSION_INT,
50};
51
52AVCodec ff_ac3_decoder = {
53    .name           = "ac3",
54    .type           = AVMEDIA_TYPE_AUDIO,
55    .id             = AV_CODEC_ID_AC3,
56    .priv_data_size = sizeof (AC3DecodeContext),
57    .init           = ac3_decode_init,
58    .close          = ac3_decode_end,
59    .decode         = ac3_decode_frame,
60    .capabilities   = CODEC_CAP_DR1,
61    .long_name      = NULL_IF_CONFIG_SMALL("ATSC A/52A (AC-3)"),
62    .sample_fmts    = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_FLTP,
63                                                      AV_SAMPLE_FMT_NONE },
64    .priv_class     = &ac3_decoder_class,
65};
66
67#if CONFIG_EAC3_DECODER
68static const AVClass eac3_decoder_class = {
69    .class_name = "E-AC3 decoder",
70    .item_name  = av_default_item_name,
71    .option     = options,
72    .version    = LIBAVUTIL_VERSION_INT,
73};
74
75AVCodec ff_eac3_decoder = {
76    .name           = "eac3",
77    .type           = AVMEDIA_TYPE_AUDIO,
78    .id             = AV_CODEC_ID_EAC3,
79    .priv_data_size = sizeof (AC3DecodeContext),
80    .init           = ac3_decode_init,
81    .close          = ac3_decode_end,
82    .decode         = ac3_decode_frame,
83    .capabilities   = CODEC_CAP_DR1,
84    .long_name      = NULL_IF_CONFIG_SMALL("ATSC A/52B (AC-3, E-AC-3)"),
85    .sample_fmts    = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_FLTP,
86                                                      AV_SAMPLE_FMT_NONE },
87    .priv_class     = &eac3_decoder_class,
88};
89#endif
90