Merge commit '1b891d17c531e8a63c2974aab4bf997ce70746f3'
[ffmpeg.git] / libavformat / pcmdec.c
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 #define RAW_SAMPLES     1024
30
31 typedef struct RawAudioDemuxerContext {
32     AVClass *class;
33     int sample_rate;
34     int channels;
35 } RawAudioDemuxerContext;
36
37 static int raw_read_header(AVFormatContext *s)
38 {
39     RawAudioDemuxerContext *s1 = s->priv_data;
40     AVStream *st;
41
42     st = avformat_new_stream(s, NULL);
43     if (!st)
44         return AVERROR(ENOMEM);
45
46
47     st->codec->codec_type  = AVMEDIA_TYPE_AUDIO;
48     st->codec->codec_id    = s->iformat->raw_codec_id;
49     st->codec->sample_rate = s1->sample_rate;
50     st->codec->channels    = s1->channels;
51
52     st->codec->bits_per_coded_sample =
53         av_get_bits_per_sample(st->codec->codec_id);
54
55     av_assert0(st->codec->bits_per_coded_sample > 0);
56
57     st->codec->block_align =
58         st->codec->bits_per_coded_sample * st->codec->channels / 8;
59
60     avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate);
61     return 0;
62 }
63
64 static int raw_read_packet(AVFormatContext *s, AVPacket *pkt)
65 {
66     int ret, size, bps;
67     //    AVStream *st = s->streams[0];
68
69     size= RAW_SAMPLES*s->streams[0]->codec->block_align;
70
71     ret= av_get_packet(s->pb, pkt, size);
72
73     pkt->flags &= ~AV_PKT_FLAG_CORRUPT;
74     pkt->stream_index = 0;
75     if (ret < 0)
76         return ret;
77
78     bps= av_get_bits_per_sample(s->streams[0]->codec->codec_id);
79     av_assert1(bps); // if false there IS a bug elsewhere (NOT in this function)
80     pkt->dts=
81     pkt->pts= pkt->pos*8 / (bps * s->streams[0]->codec->channels);
82
83     return ret;
84 }
85
86 static const AVOption pcm_options[] = {
87     { "sample_rate", "", offsetof(RawAudioDemuxerContext, sample_rate), AV_OPT_TYPE_INT, {.i64 = 44100}, 0, INT_MAX, AV_OPT_FLAG_DECODING_PARAM },
88     { "channels",    "", offsetof(RawAudioDemuxerContext, channels),    AV_OPT_TYPE_INT, {.i64 = 1}, 0, INT_MAX, AV_OPT_FLAG_DECODING_PARAM },
89     { NULL },
90 };
91
92 #define PCMDEF(name_, long_name_, ext, codec)               \
93 static const AVClass name_ ## _demuxer_class = {            \
94     .class_name = #name_ " demuxer",                        \
95     .item_name  = av_default_item_name,                     \
96     .option     = pcm_options,                              \
97     .version    = LIBAVUTIL_VERSION_INT,                    \
98 };                                                          \
99 AVInputFormat ff_pcm_ ## name_ ## _demuxer = {              \
100     .name           = #name_,                               \
101     .long_name      = NULL_IF_CONFIG_SMALL(long_name_),     \
102     .priv_data_size = sizeof(RawAudioDemuxerContext),       \
103     .read_header    = raw_read_header,                      \
104     .read_packet    = raw_read_packet,                      \
105     .read_seek      = ff_pcm_read_seek,                     \
106     .flags          = AVFMT_GENERIC_INDEX,                  \
107     .extensions     = ext,                                  \
108     .raw_codec_id   = codec,                                \
109     .priv_class     = &name_ ## _demuxer_class,             \
110 };
111
112 PCMDEF(f64be, "PCM 64-bit floating-point big-endian",
113        NULL, AV_CODEC_ID_PCM_F64BE)
114
115 PCMDEF(f64le, "PCM 64-bit floating-point little-endian",
116        NULL, AV_CODEC_ID_PCM_F64LE)
117
118 PCMDEF(f32be, "PCM 32-bit floating-point big-endian",
119        NULL, AV_CODEC_ID_PCM_F32BE)
120
121 PCMDEF(f32le, "PCM 32-bit floating-point little-endian",
122        NULL, AV_CODEC_ID_PCM_F32LE)
123
124 PCMDEF(s32be, "PCM signed 32-bit big-endian",
125        NULL, AV_CODEC_ID_PCM_S32BE)
126
127 PCMDEF(s32le, "PCM signed 32-bit little-endian",
128        NULL, AV_CODEC_ID_PCM_S32LE)
129
130 PCMDEF(s24be, "PCM signed 24-bit big-endian",
131        NULL, AV_CODEC_ID_PCM_S24BE)
132
133 PCMDEF(s24le, "PCM signed 24-bit little-endian",
134        NULL, AV_CODEC_ID_PCM_S24LE)
135
136 PCMDEF(s16be, "PCM signed 16-bit big-endian",
137        AV_NE("sw", NULL), AV_CODEC_ID_PCM_S16BE)
138
139 PCMDEF(s16le, "PCM signed 16-bit little-endian",
140        AV_NE(NULL, "sw"), AV_CODEC_ID_PCM_S16LE)
141
142 PCMDEF(s8, "PCM signed 8-bit",
143        "sb", AV_CODEC_ID_PCM_S8)
144
145 PCMDEF(u32be, "PCM unsigned 32-bit big-endian",
146        NULL, AV_CODEC_ID_PCM_U32BE)
147
148 PCMDEF(u32le, "PCM unsigned 32-bit little-endian",
149        NULL, AV_CODEC_ID_PCM_U32LE)
150
151 PCMDEF(u24be, "PCM unsigned 24-bit big-endian",
152        NULL, AV_CODEC_ID_PCM_U24BE)
153
154 PCMDEF(u24le, "PCM unsigned 24-bit little-endian",
155        NULL, AV_CODEC_ID_PCM_U24LE)
156
157 PCMDEF(u16be, "PCM unsigned 16-bit big-endian",
158        AV_NE("uw", NULL), AV_CODEC_ID_PCM_U16BE)
159
160 PCMDEF(u16le, "PCM unsigned 16-bit little-endian",
161        AV_NE(NULL, "uw"), AV_CODEC_ID_PCM_U16LE)
162
163 PCMDEF(u8, "PCM unsigned 8-bit",
164        "ub", AV_CODEC_ID_PCM_U8)
165
166 PCMDEF(alaw, "PCM A-law",
167        "al", AV_CODEC_ID_PCM_ALAW)
168
169 PCMDEF(mulaw, "PCM mu-law",
170        "ul", AV_CODEC_ID_PCM_MULAW)