Line data Source code
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 66 : static int pcm_read_header(AVFormatContext *s)
36 : {
37 66 : PCMAudioDemuxerContext *s1 = s->priv_data;
38 : AVStream *st;
39 66 : uint8_t *mime_type = NULL;
40 :
41 66 : st = avformat_new_stream(s, NULL);
42 66 : if (!st)
43 0 : return AVERROR(ENOMEM);
44 :
45 :
46 66 : st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
47 66 : st->codecpar->codec_id = s->iformat->raw_codec_id;
48 66 : st->codecpar->sample_rate = s1->sample_rate;
49 66 : st->codecpar->channels = s1->channels;
50 :
51 66 : av_opt_get(s->pb, "mime_type", AV_OPT_SEARCH_CHILDREN, &mime_type);
52 66 : if (mime_type && s->iformat->mime_type) {
53 0 : int rate = 0, channels = 0;
54 0 : size_t len = strlen(s->iformat->mime_type);
55 0 : if (!strncmp(s->iformat->mime_type, mime_type, len)) {
56 0 : uint8_t *options = mime_type + len;
57 0 : len = strlen(mime_type);
58 0 : while (options < mime_type + len) {
59 0 : options = strstr(options, ";");
60 0 : if (!options++)
61 0 : break;
62 0 : if (!rate)
63 0 : sscanf(options, " rate=%d", &rate);
64 0 : if (!channels)
65 0 : sscanf(options, " channels=%d", &channels);
66 : }
67 0 : if (rate <= 0) {
68 0 : av_log(s, AV_LOG_ERROR,
69 : "Invalid sample_rate found in mime_type \"%s\"\n",
70 : mime_type);
71 0 : av_freep(&mime_type);
72 0 : return AVERROR_INVALIDDATA;
73 : }
74 0 : st->codecpar->sample_rate = rate;
75 0 : if (channels > 0)
76 0 : st->codecpar->channels = channels;
77 : }
78 : }
79 66 : av_freep(&mime_type);
80 :
81 132 : st->codecpar->bits_per_coded_sample =
82 132 : av_get_bits_per_sample(st->codecpar->codec_id);
83 :
84 66 : av_assert0(st->codecpar->bits_per_coded_sample > 0);
85 :
86 132 : st->codecpar->block_align =
87 132 : st->codecpar->bits_per_coded_sample * st->codecpar->channels / 8;
88 :
89 66 : avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
90 66 : 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 : };
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