1/*
2 * RAW PCM demuxers
3 * Copyright (c) 2002 Fabrice Bellard
4 *
5 * This file is part of Libav.
6 *
7 * Libav 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 * Libav 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 Libav; 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 "rawdec.h"
24#include "pcm.h"
25#include "libavutil/log.h"
26#include "libavutil/opt.h"
27
28#define RAW_SAMPLES     1024
29
30static int raw_read_packet(AVFormatContext *s, AVPacket *pkt)
31{
32    int ret, size, bps;
33    //    AVStream *st = s->streams[0];
34
35    size= RAW_SAMPLES*s->streams[0]->codec->block_align;
36
37    ret= av_get_packet(s->pb, pkt, size);
38
39    pkt->stream_index = 0;
40    if (ret < 0)
41        return ret;
42
43    bps= av_get_bits_per_sample(s->streams[0]->codec->codec_id);
44    assert(bps); // if false there IS a bug elsewhere (NOT in this function)
45    pkt->dts=
46    pkt->pts= pkt->pos*8 / (bps * s->streams[0]->codec->channels);
47
48    return ret;
49}
50
51static const AVOption pcm_options[] = {
52    { "sample_rate", "", offsetof(RawAudioDemuxerContext, sample_rate), AV_OPT_TYPE_INT, {.dbl = 0}, 0, INT_MAX, AV_OPT_FLAG_DECODING_PARAM },
53    { "channels",    "", offsetof(RawAudioDemuxerContext, channels),    AV_OPT_TYPE_INT, {.dbl = 0}, 0, INT_MAX, AV_OPT_FLAG_DECODING_PARAM },
54    { NULL },
55};
56
57#define PCMDEF(name_, long_name_, ext, codec)               \
58static const AVClass name_ ## _demuxer_class = {            \
59    .class_name = #name_ " demuxer",                        \
60    .item_name  = av_default_item_name,                     \
61    .option     = pcm_options,                              \
62    .version    = LIBAVUTIL_VERSION_INT,                    \
63};                                                          \
64AVInputFormat ff_pcm_ ## name_ ## _demuxer = {              \
65    .name           = #name_,                               \
66    .long_name      = NULL_IF_CONFIG_SMALL(long_name_),     \
67    .priv_data_size = sizeof(RawAudioDemuxerContext),       \
68    .read_header    = ff_raw_read_header,                   \
69    .read_packet    = raw_read_packet,                      \
70    .read_seek      = pcm_read_seek,                        \
71    .flags          = AVFMT_GENERIC_INDEX,                  \
72    .extensions     = ext,                                  \
73    .value          = codec,                                \
74    .priv_class     = &name_ ## _demuxer_class,             \
75};
76
77PCMDEF(f64be, "PCM 64 bit floating-point big-endian format",
78       NULL, CODEC_ID_PCM_F64BE)
79
80PCMDEF(f64le, "PCM 64 bit floating-point little-endian format",
81       NULL, CODEC_ID_PCM_F64LE)
82
83PCMDEF(f32be, "PCM 32 bit floating-point big-endian format",
84       NULL, CODEC_ID_PCM_F32BE)
85
86PCMDEF(f32le, "PCM 32 bit floating-point little-endian format",
87       NULL, CODEC_ID_PCM_F32LE)
88
89PCMDEF(s32be, "PCM signed 32 bit big-endian format",
90       NULL, CODEC_ID_PCM_S32BE)
91
92PCMDEF(s32le, "PCM signed 32 bit little-endian format",
93       NULL, CODEC_ID_PCM_S32LE)
94
95PCMDEF(s24be, "PCM signed 24 bit big-endian format",
96       NULL, CODEC_ID_PCM_S24BE)
97
98PCMDEF(s24le, "PCM signed 24 bit little-endian format",
99       NULL, CODEC_ID_PCM_S24LE)
100
101PCMDEF(s16be, "PCM signed 16 bit big-endian format",
102       AV_NE("sw", NULL), CODEC_ID_PCM_S16BE)
103
104PCMDEF(s16le, "PCM signed 16 bit little-endian format",
105       AV_NE(NULL, "sw"), CODEC_ID_PCM_S16LE)
106
107PCMDEF(s8, "PCM signed 8 bit format",
108       "sb", CODEC_ID_PCM_S8)
109
110PCMDEF(u32be, "PCM unsigned 32 bit big-endian format",
111       NULL, CODEC_ID_PCM_U32BE)
112
113PCMDEF(u32le, "PCM unsigned 32 bit little-endian format",
114       NULL, CODEC_ID_PCM_U32LE)
115
116PCMDEF(u24be, "PCM unsigned 24 bit big-endian format",
117       NULL, CODEC_ID_PCM_U24BE)
118
119PCMDEF(u24le, "PCM unsigned 24 bit little-endian format",
120       NULL, CODEC_ID_PCM_U24LE)
121
122PCMDEF(u16be, "PCM unsigned 16 bit big-endian format",
123       AV_NE("uw", NULL), CODEC_ID_PCM_U16BE)
124
125PCMDEF(u16le, "PCM unsigned 16 bit little-endian format",
126       AV_NE(NULL, "uw"), CODEC_ID_PCM_U16LE)
127
128PCMDEF(u8, "PCM unsigned 8 bit format",
129       "ub", CODEC_ID_PCM_U8)
130
131PCMDEF(alaw, "PCM A-law format",
132       "al", CODEC_ID_PCM_ALAW)
133
134PCMDEF(mulaw, "PCM mu-law format",
135       "ul", CODEC_ID_PCM_MULAW)
136