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