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
29typedef struct PCMAudioDemuxerContext {
30    AVClass *class;
31    int sample_rate;
32    int channels;
33} PCMAudioDemuxerContext;
34
35static 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
62static 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)               \
69static 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};                                                          \
75AVInputFormat 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
88PCMDEF(f64be, "PCM 64-bit floating-point big-endian",
89       NULL, AV_CODEC_ID_PCM_F64BE)
90
91PCMDEF(f64le, "PCM 64-bit floating-point little-endian",
92       NULL, AV_CODEC_ID_PCM_F64LE)
93
94PCMDEF(f32be, "PCM 32-bit floating-point big-endian",
95       NULL, AV_CODEC_ID_PCM_F32BE)
96
97PCMDEF(f32le, "PCM 32-bit floating-point little-endian",
98       NULL, AV_CODEC_ID_PCM_F32LE)
99
100PCMDEF(s32be, "PCM signed 32-bit big-endian",
101       NULL, AV_CODEC_ID_PCM_S32BE)
102
103PCMDEF(s32le, "PCM signed 32-bit little-endian",
104       NULL, AV_CODEC_ID_PCM_S32LE)
105
106PCMDEF(s24be, "PCM signed 24-bit big-endian",
107       NULL, AV_CODEC_ID_PCM_S24BE)
108
109PCMDEF(s24le, "PCM signed 24-bit little-endian",
110       NULL, AV_CODEC_ID_PCM_S24LE)
111
112PCMDEF(s16be, "PCM signed 16-bit big-endian",
113       AV_NE("sw", NULL), AV_CODEC_ID_PCM_S16BE)
114
115PCMDEF(s16le, "PCM signed 16-bit little-endian",
116       AV_NE(NULL, "sw"), AV_CODEC_ID_PCM_S16LE)
117
118PCMDEF(s8, "PCM signed 8-bit",
119       "sb", AV_CODEC_ID_PCM_S8)
120
121PCMDEF(u32be, "PCM unsigned 32-bit big-endian",
122       NULL, AV_CODEC_ID_PCM_U32BE)
123
124PCMDEF(u32le, "PCM unsigned 32-bit little-endian",
125       NULL, AV_CODEC_ID_PCM_U32LE)
126
127PCMDEF(u24be, "PCM unsigned 24-bit big-endian",
128       NULL, AV_CODEC_ID_PCM_U24BE)
129
130PCMDEF(u24le, "PCM unsigned 24-bit little-endian",
131       NULL, AV_CODEC_ID_PCM_U24LE)
132
133PCMDEF(u16be, "PCM unsigned 16-bit big-endian",
134       AV_NE("uw", NULL), AV_CODEC_ID_PCM_U16BE)
135
136PCMDEF(u16le, "PCM unsigned 16-bit little-endian",
137       AV_NE(NULL, "uw"), AV_CODEC_ID_PCM_U16LE)
138
139PCMDEF(u8, "PCM unsigned 8-bit",
140       "ub", AV_CODEC_ID_PCM_U8)
141
142PCMDEF(alaw, "PCM A-law",
143       "al", AV_CODEC_ID_PCM_ALAW)
144
145PCMDEF(mulaw, "PCM mu-law",
146       "ul", AV_CODEC_ID_PCM_MULAW)
147
148static 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
154static 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
161AVInputFormat 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};
173