| 1 | /* |
| 2 | * RAW PCM demuxers |
| 3 | * Copyright (c) 2002 Fabrice Bellard |
| 4 | * |
| 5 | * This file is part of FFmpeg. |
| 6 | * |
| 7 | * FFmpeg is free software; you can redistribute it and/or |
| 8 | * modify it under the terms of the GNU Lesser General Public |
| 9 | * License as published by the Free Software Foundation; either |
| 10 | * version 2.1 of the License, or (at your option) any later version. |
| 11 | * |
| 12 | * FFmpeg is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 15 | * Lesser General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU Lesser General Public |
| 18 | * License along with FFmpeg; if not, write to the Free Software |
| 19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 20 | */ |
| 21 | |
| 22 | #include "avformat.h" |
| 23 | #include "internal.h" |
| 24 | #include "pcm.h" |
| 25 | #include "libavutil/log.h" |
| 26 | #include "libavutil/opt.h" |
| 27 | #include "libavutil/avassert.h" |
| 28 | |
| 29 | typedef struct PCMAudioDemuxerContext { |
| 30 | AVClass *class; |
| 31 | int sample_rate; |
| 32 | int channels; |
| 33 | } PCMAudioDemuxerContext; |
| 34 | |
| 35 | static int pcm_read_header(AVFormatContext *s) |
| 36 | { |
| 37 | PCMAudioDemuxerContext *s1 = s->priv_data; |
| 38 | AVStream *st; |
| 39 | |
| 40 | st = avformat_new_stream(s, NULL); |
| 41 | if (!st) |
| 42 | return AVERROR(ENOMEM); |
| 43 | |
| 44 | |
| 45 | st->codec->codec_type = AVMEDIA_TYPE_AUDIO; |
| 46 | st->codec->codec_id = s->iformat->raw_codec_id; |
| 47 | st->codec->sample_rate = s1->sample_rate; |
| 48 | st->codec->channels = s1->channels; |
| 49 | |
| 50 | st->codec->bits_per_coded_sample = |
| 51 | av_get_bits_per_sample(st->codec->codec_id); |
| 52 | |
| 53 | av_assert0(st->codec->bits_per_coded_sample > 0); |
| 54 | |
| 55 | st->codec->block_align = |
| 56 | st->codec->bits_per_coded_sample * st->codec->channels / 8; |
| 57 | |
| 58 | avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate); |
| 59 | return 0; |
| 60 | } |
| 61 | |
| 62 | static const AVOption pcm_options[] = { |
| 63 | { "sample_rate", "", offsetof(PCMAudioDemuxerContext, sample_rate), AV_OPT_TYPE_INT, {.i64 = 44100}, 0, INT_MAX, AV_OPT_FLAG_DECODING_PARAM }, |
| 64 | { "channels", "", offsetof(PCMAudioDemuxerContext, channels), AV_OPT_TYPE_INT, {.i64 = 1}, 0, INT_MAX, AV_OPT_FLAG_DECODING_PARAM }, |
| 65 | { NULL }, |
| 66 | }; |
| 67 | |
| 68 | #define PCMDEF(name_, long_name_, ext, codec) \ |
| 69 | static const AVClass name_ ## _demuxer_class = { \ |
| 70 | .class_name = #name_ " demuxer", \ |
| 71 | .item_name = av_default_item_name, \ |
| 72 | .option = pcm_options, \ |
| 73 | .version = LIBAVUTIL_VERSION_INT, \ |
| 74 | }; \ |
| 75 | AVInputFormat ff_pcm_ ## name_ ## _demuxer = { \ |
| 76 | .name = #name_, \ |
| 77 | .long_name = NULL_IF_CONFIG_SMALL(long_name_), \ |
| 78 | .priv_data_size = sizeof(PCMAudioDemuxerContext), \ |
| 79 | .read_header = pcm_read_header, \ |
| 80 | .read_packet = ff_pcm_read_packet, \ |
| 81 | .read_seek = ff_pcm_read_seek, \ |
| 82 | .flags = AVFMT_GENERIC_INDEX, \ |
| 83 | .extensions = ext, \ |
| 84 | .raw_codec_id = codec, \ |
| 85 | .priv_class = &name_ ## _demuxer_class, \ |
| 86 | }; |
| 87 | |
| 88 | PCMDEF(f64be, "PCM 64-bit floating-point big-endian", |
| 89 | NULL, AV_CODEC_ID_PCM_F64BE) |
| 90 | |
| 91 | PCMDEF(f64le, "PCM 64-bit floating-point little-endian", |
| 92 | NULL, AV_CODEC_ID_PCM_F64LE) |
| 93 | |
| 94 | PCMDEF(f32be, "PCM 32-bit floating-point big-endian", |
| 95 | NULL, AV_CODEC_ID_PCM_F32BE) |
| 96 | |
| 97 | PCMDEF(f32le, "PCM 32-bit floating-point little-endian", |
| 98 | NULL, AV_CODEC_ID_PCM_F32LE) |
| 99 | |
| 100 | PCMDEF(s32be, "PCM signed 32-bit big-endian", |
| 101 | NULL, AV_CODEC_ID_PCM_S32BE) |
| 102 | |
| 103 | PCMDEF(s32le, "PCM signed 32-bit little-endian", |
| 104 | NULL, AV_CODEC_ID_PCM_S32LE) |
| 105 | |
| 106 | PCMDEF(s24be, "PCM signed 24-bit big-endian", |
| 107 | NULL, AV_CODEC_ID_PCM_S24BE) |
| 108 | |
| 109 | PCMDEF(s24le, "PCM signed 24-bit little-endian", |
| 110 | NULL, AV_CODEC_ID_PCM_S24LE) |
| 111 | |
| 112 | PCMDEF(s16be, "PCM signed 16-bit big-endian", |
| 113 | AV_NE("sw", NULL), AV_CODEC_ID_PCM_S16BE) |
| 114 | |
| 115 | PCMDEF(s16le, "PCM signed 16-bit little-endian", |
| 116 | AV_NE(NULL, "sw"), AV_CODEC_ID_PCM_S16LE) |
| 117 | |
| 118 | PCMDEF(s8, "PCM signed 8-bit", |
| 119 | "sb", AV_CODEC_ID_PCM_S8) |
| 120 | |
| 121 | PCMDEF(u32be, "PCM unsigned 32-bit big-endian", |
| 122 | NULL, AV_CODEC_ID_PCM_U32BE) |
| 123 | |
| 124 | PCMDEF(u32le, "PCM unsigned 32-bit little-endian", |
| 125 | NULL, AV_CODEC_ID_PCM_U32LE) |
| 126 | |
| 127 | PCMDEF(u24be, "PCM unsigned 24-bit big-endian", |
| 128 | NULL, AV_CODEC_ID_PCM_U24BE) |
| 129 | |
| 130 | PCMDEF(u24le, "PCM unsigned 24-bit little-endian", |
| 131 | NULL, AV_CODEC_ID_PCM_U24LE) |
| 132 | |
| 133 | PCMDEF(u16be, "PCM unsigned 16-bit big-endian", |
| 134 | AV_NE("uw", NULL), AV_CODEC_ID_PCM_U16BE) |
| 135 | |
| 136 | PCMDEF(u16le, "PCM unsigned 16-bit little-endian", |
| 137 | AV_NE(NULL, "uw"), AV_CODEC_ID_PCM_U16LE) |
| 138 | |
| 139 | PCMDEF(u8, "PCM unsigned 8-bit", |
| 140 | "ub", AV_CODEC_ID_PCM_U8) |
| 141 | |
| 142 | PCMDEF(alaw, "PCM A-law", |
| 143 | "al", AV_CODEC_ID_PCM_ALAW) |
| 144 | |
| 145 | PCMDEF(mulaw, "PCM mu-law", |
| 146 | "ul", AV_CODEC_ID_PCM_MULAW) |
| 147 | |
| 148 | static const AVOption sln_options[] = { |
| 149 | { "sample_rate", "", offsetof(PCMAudioDemuxerContext, sample_rate), AV_OPT_TYPE_INT, {.i64 = 8000}, 0, INT_MAX, AV_OPT_FLAG_DECODING_PARAM }, |
| 150 | { "channels", "", offsetof(PCMAudioDemuxerContext, channels), AV_OPT_TYPE_INT, {.i64 = 1}, 0, INT_MAX, AV_OPT_FLAG_DECODING_PARAM }, |
| 151 | { NULL }, |
| 152 | }; |
| 153 | |
| 154 | static const AVClass sln_demuxer_class = { |
| 155 | .class_name = "sln demuxer", |
| 156 | .item_name = av_default_item_name, |
| 157 | .option = sln_options, |
| 158 | .version = LIBAVUTIL_VERSION_INT, |
| 159 | }; |
| 160 | |
| 161 | AVInputFormat ff_sln_demuxer = { |
| 162 | .name = "sln", |
| 163 | .long_name = NULL_IF_CONFIG_SMALL("Asterisk raw pcm"), |
| 164 | .priv_data_size = sizeof(PCMAudioDemuxerContext), |
| 165 | .read_header = pcm_read_header, |
| 166 | .read_packet = ff_pcm_read_packet, |
| 167 | .read_seek = ff_pcm_read_seek, |
| 168 | .flags = AVFMT_GENERIC_INDEX, |
| 169 | .extensions = "sln", |
| 170 | .raw_codec_id = AV_CODEC_ID_PCM_S16LE, |
| 171 | .priv_class = &sln_demuxer_class, |
| 172 | }; |