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2ba45a60 DM |
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 | ||
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 }, | |
37 | ||
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}, | |
43 | ||
44 | { NULL}, | |
45 | }; | |
46 | ||
47 | static const AVClass ac3_decoder_class = { | |
48 | .class_name = "AC3 decoder", | |
49 | .item_name = av_default_item_name, | |
50 | .option = options, | |
51 | .version = LIBAVUTIL_VERSION_INT, | |
52 | }; | |
53 | ||
54 | AVCodec ff_ac3_decoder = { | |
55 | .name = "ac3", | |
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, | |
65 | AV_SAMPLE_FMT_NONE }, | |
66 | .priv_class = &ac3_decoder_class, | |
67 | }; | |
68 | ||
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, | |
73 | .option = options, | |
74 | .version = LIBAVUTIL_VERSION_INT, | |
75 | }; | |
76 | ||
77 | AVCodec ff_eac3_decoder = { | |
78 | .name = "eac3", | |
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, | |
88 | AV_SAMPLE_FMT_NONE }, | |
89 | .priv_class = &eac3_decoder_class, | |
90 | }; | |
91 | #endif |