avdevice/decklink_enc: add support for setting duplex mode
[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 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     uint8_t *mime_type = NULL;
40
41     st = avformat_new_stream(s, NULL);
42     if (!st)
43         return AVERROR(ENOMEM);
44
45
46     st->codecpar->codec_type  = AVMEDIA_TYPE_AUDIO;
47     st->codecpar->codec_id    = s->iformat->raw_codec_id;
48     st->codecpar->sample_rate = s1->sample_rate;
49     st->codecpar->channels    = s1->channels;
50
51     av_opt_get(s->pb, "mime_type", AV_OPT_SEARCH_CHILDREN, &mime_type);
52     if (mime_type && s->iformat->mime_type) {
53         int rate = 0, channels = 0;
54         size_t len = strlen(s->iformat->mime_type);
55         if (!strncmp(s->iformat->mime_type, mime_type, len)) {
56             uint8_t *options = mime_type + len;
57             len = strlen(mime_type);
58             while (options < mime_type + len) {
59                 options = strstr(options, ";");
60                 if (!options++)
61                     break;
62                 if (!rate)
63                     sscanf(options, " rate=%d",     &rate);
64                 if (!channels)
65                     sscanf(options, " channels=%d", &channels);
66             }
67             if (rate <= 0) {
68                 av_log(s, AV_LOG_ERROR,
69                        "Invalid sample_rate found in mime_type \"%s\"\n",
70                        mime_type);
71                 av_freep(&mime_type);
72                 return AVERROR_INVALIDDATA;
73             }
74             st->codecpar->sample_rate = rate;
75             if (channels > 0)
76                 st->codecpar->channels = channels;
77         }
78     }
79     av_freep(&mime_type);
80
81     st->codecpar->bits_per_coded_sample =
82         av_get_bits_per_sample(st->codecpar->codec_id);
83
84     av_assert0(st->codecpar->bits_per_coded_sample > 0);
85
86     st->codecpar->block_align =
87         st->codecpar->bits_per_coded_sample * st->codecpar->channels / 8;
88
89     avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
90     return 0;
91 }
92
93 static const AVOption pcm_options[] = {
94     { "sample_rate", "", offsetof(PCMAudioDemuxerContext, sample_rate), AV_OPT_TYPE_INT, {.i64 = 44100}, 0, INT_MAX, AV_OPT_FLAG_DECODING_PARAM },
95     { "channels",    "", offsetof(PCMAudioDemuxerContext, channels),    AV_OPT_TYPE_INT, {.i64 = 1}, 0, INT_MAX, AV_OPT_FLAG_DECODING_PARAM },
96     { NULL },
97 };
98
99 #define PCMDEF(name_, long_name_, ext, codec, ...)          \
100 static const AVClass name_ ## _demuxer_class = {            \
101     .class_name = #name_ " demuxer",                        \
102     .item_name  = av_default_item_name,                     \
103     .option     = pcm_options,                              \
104     .version    = LIBAVUTIL_VERSION_INT,                    \
105 };                                                          \
106 AVInputFormat ff_pcm_ ## name_ ## _demuxer = {              \
107     .name           = #name_,                               \
108     .long_name      = NULL_IF_CONFIG_SMALL(long_name_),     \
109     .priv_data_size = sizeof(PCMAudioDemuxerContext),       \
110     .read_header    = pcm_read_header,                      \
111     .read_packet    = ff_pcm_read_packet,                   \
112     .read_seek      = ff_pcm_read_seek,                     \
113     .flags          = AVFMT_GENERIC_INDEX,                  \
114     .extensions     = ext,                                  \
115     .raw_codec_id   = codec,                                \
116     .priv_class     = &name_ ## _demuxer_class,             \
117     __VA_ARGS__                                             \
118 };
119
120 PCMDEF(f64be, "PCM 64-bit floating-point big-endian",
121        NULL, AV_CODEC_ID_PCM_F64BE)
122
123 PCMDEF(f64le, "PCM 64-bit floating-point little-endian",
124        NULL, AV_CODEC_ID_PCM_F64LE)
125
126 PCMDEF(f32be, "PCM 32-bit floating-point big-endian",
127        NULL, AV_CODEC_ID_PCM_F32BE)
128
129 PCMDEF(f32le, "PCM 32-bit floating-point little-endian",
130        NULL, AV_CODEC_ID_PCM_F32LE)
131
132 PCMDEF(s32be, "PCM signed 32-bit big-endian",
133        NULL, AV_CODEC_ID_PCM_S32BE)
134
135 PCMDEF(s32le, "PCM signed 32-bit little-endian",
136        NULL, AV_CODEC_ID_PCM_S32LE)
137
138 PCMDEF(s24be, "PCM signed 24-bit big-endian",
139        NULL, AV_CODEC_ID_PCM_S24BE)
140
141 PCMDEF(s24le, "PCM signed 24-bit little-endian",
142        NULL, AV_CODEC_ID_PCM_S24LE)
143
144 PCMDEF(s16be, "PCM signed 16-bit big-endian",
145        AV_NE("sw", NULL), AV_CODEC_ID_PCM_S16BE)
146
147 PCMDEF(s16le, "PCM signed 16-bit little-endian",
148        AV_NE(NULL, "sw"), AV_CODEC_ID_PCM_S16LE, .mime_type = "audio/L16",)
149
150 PCMDEF(s8, "PCM signed 8-bit",
151        "sb", AV_CODEC_ID_PCM_S8)
152
153 PCMDEF(u32be, "PCM unsigned 32-bit big-endian",
154        NULL, AV_CODEC_ID_PCM_U32BE)
155
156 PCMDEF(u32le, "PCM unsigned 32-bit little-endian",
157        NULL, AV_CODEC_ID_PCM_U32LE)
158
159 PCMDEF(u24be, "PCM unsigned 24-bit big-endian",
160        NULL, AV_CODEC_ID_PCM_U24BE)
161
162 PCMDEF(u24le, "PCM unsigned 24-bit little-endian",
163        NULL, AV_CODEC_ID_PCM_U24LE)
164
165 PCMDEF(u16be, "PCM unsigned 16-bit big-endian",
166        AV_NE("uw", NULL), AV_CODEC_ID_PCM_U16BE)
167
168 PCMDEF(u16le, "PCM unsigned 16-bit little-endian",
169        AV_NE(NULL, "uw"), AV_CODEC_ID_PCM_U16LE)
170
171 PCMDEF(u8, "PCM unsigned 8-bit",
172        "ub", AV_CODEC_ID_PCM_U8)
173
174 PCMDEF(alaw, "PCM A-law",
175        "al", AV_CODEC_ID_PCM_ALAW)
176
177 PCMDEF(mulaw, "PCM mu-law",
178        "ul", AV_CODEC_ID_PCM_MULAW)
179
180 static const AVOption sln_options[] = {
181     { "sample_rate", "", offsetof(PCMAudioDemuxerContext, sample_rate), AV_OPT_TYPE_INT, {.i64 = 8000}, 0, INT_MAX, AV_OPT_FLAG_DECODING_PARAM },
182     { "channels",    "", offsetof(PCMAudioDemuxerContext, channels),    AV_OPT_TYPE_INT, {.i64 = 1}, 0, INT_MAX, AV_OPT_FLAG_DECODING_PARAM },
183     { NULL },
184 };
185
186 static const AVClass sln_demuxer_class = {
187     .class_name = "sln demuxer",
188     .item_name  = av_default_item_name,
189     .option     = sln_options,
190     .version    = LIBAVUTIL_VERSION_INT,
191 };
192
193 AVInputFormat ff_sln_demuxer = {
194     .name           = "sln",
195     .long_name      = NULL_IF_CONFIG_SMALL("Asterisk raw pcm"),
196     .priv_data_size = sizeof(PCMAudioDemuxerContext),
197     .read_header    = pcm_read_header,
198     .read_packet    = ff_pcm_read_packet,
199     .read_seek      = ff_pcm_read_seek,
200     .flags          = AVFMT_GENERIC_INDEX,
201     .extensions     = "sln",
202     .raw_codec_id   = AV_CODEC_ID_PCM_S16LE,
203     .priv_class     = &sln_demuxer_class,
204 };