| 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 |