ad478852979e6a5ad00a021a24a48f81ae673987
[ffmpeg.git] / libavformat / pcmdec.c
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
30 static 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
51 static const AVOption pcm_options[] = {
52     { "sample_rate", "", offsetof(RawAudioDemuxerContext, sample_rate), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, AV_OPT_FLAG_DECODING_PARAM },
53     { "channels",    "", offsetof(RawAudioDemuxerContext, channels),    AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, AV_OPT_FLAG_DECODING_PARAM },
54     { NULL },
55 };
56
57 #define PCMDEF(name_, long_name_, ext, codec)               \
58 static 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 };                                                          \
64 AVInputFormat 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      = ff_pcm_read_seek,                     \
71     .flags          = AVFMT_GENERIC_INDEX,                  \
72     .extensions     = ext,                                  \
73     .raw_codec_id   = codec,                                \
74     .priv_class     = &name_ ## _demuxer_class,             \
75 };
76
77 PCMDEF(f64be, "PCM 64-bit floating-point big-endian",
78        NULL, AV_CODEC_ID_PCM_F64BE)
79
80 PCMDEF(f64le, "PCM 64-bit floating-point little-endian",
81        NULL, AV_CODEC_ID_PCM_F64LE)
82
83 PCMDEF(f32be, "PCM 32-bit floating-point big-endian",
84        NULL, AV_CODEC_ID_PCM_F32BE)
85
86 PCMDEF(f32le, "PCM 32-bit floating-point little-endian",
87        NULL, AV_CODEC_ID_PCM_F32LE)
88
89 PCMDEF(s32be, "PCM signed 32-bit big-endian",
90        NULL, AV_CODEC_ID_PCM_S32BE)
91
92 PCMDEF(s32le, "PCM signed 32-bit little-endian",
93        NULL, AV_CODEC_ID_PCM_S32LE)
94
95 PCMDEF(s24be, "PCM signed 24-bit big-endian",
96        NULL, AV_CODEC_ID_PCM_S24BE)
97
98 PCMDEF(s24le, "PCM signed 24-bit little-endian",
99        NULL, AV_CODEC_ID_PCM_S24LE)
100
101 PCMDEF(s16be, "PCM signed 16-bit big-endian",
102        AV_NE("sw", NULL), AV_CODEC_ID_PCM_S16BE)
103
104 PCMDEF(s16le, "PCM signed 16-bit little-endian",
105        AV_NE(NULL, "sw"), AV_CODEC_ID_PCM_S16LE)
106
107 PCMDEF(s8, "PCM signed 8-bit",
108        "sb", AV_CODEC_ID_PCM_S8)
109
110 PCMDEF(u32be, "PCM unsigned 32-bit big-endian",
111        NULL, AV_CODEC_ID_PCM_U32BE)
112
113 PCMDEF(u32le, "PCM unsigned 32-bit little-endian",
114        NULL, AV_CODEC_ID_PCM_U32LE)
115
116 PCMDEF(u24be, "PCM unsigned 24-bit big-endian",
117        NULL, AV_CODEC_ID_PCM_U24BE)
118
119 PCMDEF(u24le, "PCM unsigned 24-bit little-endian",
120        NULL, AV_CODEC_ID_PCM_U24LE)
121
122 PCMDEF(u16be, "PCM unsigned 16-bit big-endian",
123        AV_NE("uw", NULL), AV_CODEC_ID_PCM_U16BE)
124
125 PCMDEF(u16le, "PCM unsigned 16-bit little-endian",
126        AV_NE(NULL, "uw"), AV_CODEC_ID_PCM_U16LE)
127
128 PCMDEF(u8, "PCM unsigned 8-bit",
129        "ub", AV_CODEC_ID_PCM_U8)
130
131 PCMDEF(alaw, "PCM A-law",
132        "al", AV_CODEC_ID_PCM_ALAW)
133
134 PCMDEF(mulaw, "PCM mu-law",
135        "ul", AV_CODEC_ID_PCM_MULAW)