FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavformat/pcmdec.c
Date: 2022-11-26 13:19:19
Exec Total Coverage
Lines: 21 44 47.7%
Branches: 6 30 20.0%

Line Branch Exec Source
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 "config_components.h"
23
24 #include "libavutil/avstring.h"
25 #include "libavutil/channel_layout.h"
26 #include "avformat.h"
27 #include "internal.h"
28 #include "pcm.h"
29 #include "libavutil/log.h"
30 #include "libavutil/opt.h"
31 #include "libavutil/avassert.h"
32
33 typedef struct PCMAudioDemuxerContext {
34 AVClass *class;
35 int sample_rate;
36 #if FF_API_OLD_CHANNEL_LAYOUT
37 int channels;
38 #endif
39 AVChannelLayout ch_layout;
40 } PCMAudioDemuxerContext;
41
42 67 static int pcm_read_header(AVFormatContext *s)
43 {
44 67 PCMAudioDemuxerContext *s1 = s->priv_data;
45 AVCodecParameters *par;
46 AVStream *st;
47 67 uint8_t *mime_type = NULL;
48 int ret;
49
50 67 st = avformat_new_stream(s, NULL);
51
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 67 times.
67 if (!st)
52 return AVERROR(ENOMEM);
53 67 par = st->codecpar;
54
55 67 par->codec_type = AVMEDIA_TYPE_AUDIO;
56 67 par->codec_id = s->iformat->raw_codec_id;
57 67 par->sample_rate = s1->sample_rate;
58 #if FF_API_OLD_CHANNEL_LAYOUT
59
2/2
✓ Branch 0 taken 11 times.
✓ Branch 1 taken 56 times.
67 if (s1->ch_layout.nb_channels) {
60 #endif
61 11 ret = av_channel_layout_copy(&par->ch_layout, &s1->ch_layout);
62
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 11 times.
11 if (ret < 0)
63 return ret;
64 #if FF_API_OLD_CHANNEL_LAYOUT
65 } else
66 56 par->ch_layout.nb_channels = s1->channels;
67 #endif
68
69 67 av_opt_get(s->pb, "mime_type", AV_OPT_SEARCH_CHILDREN, &mime_type);
70
1/4
✗ Branch 0 not taken.
✓ Branch 1 taken 67 times.
✗ Branch 2 not taken.
✗ Branch 3 not taken.
67 if (mime_type && s->iformat->mime_type) {
71 int rate = 0, channels = 0, little_endian = 0;
72 const char *options;
73 if (av_stristart(mime_type, s->iformat->mime_type, &options)) { /* audio/L16 */
74 while (options = strchr(options, ';')) {
75 options++;
76 if (!rate)
77 sscanf(options, " rate=%d", &rate);
78 if (!channels)
79 sscanf(options, " channels=%d", &channels);
80 if (!little_endian) {
81 char val[sizeof("little-endian")];
82 if (sscanf(options, " endianness=%13s", val) == 1) {
83 little_endian = strcmp(val, "little-endian") == 0;
84 }
85 }
86 }
87 if (rate <= 0) {
88 av_log(s, AV_LOG_ERROR,
89 "Invalid sample_rate found in mime_type \"%s\"\n",
90 mime_type);
91 av_freep(&mime_type);
92 return AVERROR_INVALIDDATA;
93 }
94 par->sample_rate = rate;
95 if (channels > 0) {
96 av_channel_layout_uninit(&par->ch_layout);
97 par->ch_layout.nb_channels = channels;
98 }
99 if (little_endian)
100 par->codec_id = AV_CODEC_ID_PCM_S16LE;
101 }
102 }
103 67 av_freep(&mime_type);
104
105 67 par->bits_per_coded_sample = av_get_bits_per_sample(par->codec_id);
106
107
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 67 times.
67 av_assert0(par->bits_per_coded_sample > 0);
108
109 67 par->block_align = par->bits_per_coded_sample * par->ch_layout.nb_channels / 8;
110
111 67 avpriv_set_pts_info(st, 64, 1, par->sample_rate);
112 67 return 0;
113 }
114
115 static const AVOption pcm_options[] = {
116 { "sample_rate", "", offsetof(PCMAudioDemuxerContext, sample_rate), AV_OPT_TYPE_INT, {.i64 = 44100}, 0, INT_MAX, AV_OPT_FLAG_DECODING_PARAM },
117 #if FF_API_OLD_CHANNEL_LAYOUT
118 { "channels", "", offsetof(PCMAudioDemuxerContext, channels), AV_OPT_TYPE_INT, {.i64 = 1}, 0, INT_MAX, AV_OPT_FLAG_DECODING_PARAM | AV_OPT_FLAG_DEPRECATED },
119 { "ch_layout", "", offsetof(PCMAudioDemuxerContext, ch_layout), AV_OPT_TYPE_CHLAYOUT, {.str = NULL}, 0, 0, AV_OPT_FLAG_DECODING_PARAM },
120 #else
121 { "ch_layout", "", offsetof(PCMAudioDemuxerContext, ch_layout), AV_OPT_TYPE_CHLAYOUT, {.str = "mono"}, 0, 0, AV_OPT_FLAG_DECODING_PARAM },
122 #endif
123 { NULL },
124 };
125 static const AVClass pcm_demuxer_class = {
126 .class_name = "pcm demuxer",
127 .item_name = av_default_item_name,
128 .option = pcm_options,
129 .version = LIBAVUTIL_VERSION_INT,
130 };
131
132 #define PCMDEF_0(name_, long_name_, ext, codec, ...)
133 #define PCMDEF_1(name_, long_name_, ext, codec, ...) \
134 const AVInputFormat ff_pcm_ ## name_ ## _demuxer = { \
135 .name = #name_, \
136 .long_name = NULL_IF_CONFIG_SMALL(long_name_), \
137 .priv_data_size = sizeof(PCMAudioDemuxerContext), \
138 .read_header = pcm_read_header, \
139 .read_packet = ff_pcm_read_packet, \
140 .read_seek = ff_pcm_read_seek, \
141 .flags = AVFMT_GENERIC_INDEX, \
142 .extensions = ext, \
143 .raw_codec_id = codec, \
144 .priv_class = &pcm_demuxer_class, \
145 __VA_ARGS__ \
146 };
147 #define PCMDEF_2(name, long_name, ext, codec, enabled, ...) \
148 PCMDEF_ ## enabled(name, long_name, ext, codec, __VA_ARGS__)
149 #define PCMDEF_3(name, long_name, ext, codec, config, ...) \
150 PCMDEF_2(name, long_name, ext, codec, config, __VA_ARGS__)
151 #define PCMDEF_EXT(name, long_name, ext, uppercase, ...) \
152 PCMDEF_3(name, long_name, ext, AV_CODEC_ID_PCM_ ## uppercase, \
153 CONFIG_PCM_ ## uppercase ## _DEMUXER, __VA_ARGS__)
154 #define PCMDEF(name, long_name, ext, uppercase) \
155 PCMDEF_EXT(name, long_name, ext, uppercase, )
156
157 PCMDEF(f64be, "PCM 64-bit floating-point big-endian", NULL, F64BE)
158 PCMDEF(f64le, "PCM 64-bit floating-point little-endian", NULL, F64LE)
159 PCMDEF(f32be, "PCM 32-bit floating-point big-endian", NULL, F32BE)
160 PCMDEF(f32le, "PCM 32-bit floating-point little-endian", NULL, F32LE)
161 PCMDEF(s32be, "PCM signed 32-bit big-endian", NULL, S32BE)
162 PCMDEF(s32le, "PCM signed 32-bit little-endian", NULL, S32LE)
163 PCMDEF(s24be, "PCM signed 24-bit big-endian", NULL, S24BE)
164 PCMDEF(s24le, "PCM signed 24-bit little-endian", NULL, S24LE)
165 PCMDEF_EXT(s16be, "PCM signed 16-bit big-endian",
166 AV_NE("sw", NULL), S16BE, .mime_type = "audio/L16")
167 PCMDEF(s16le, "PCM signed 16-bit little-endian", AV_NE(NULL, "sw"), S16LE)
168 PCMDEF(s8, "PCM signed 8-bit", "sb", S8)
169 PCMDEF(u32be, "PCM unsigned 32-bit big-endian", NULL, U32BE)
170 PCMDEF(u32le, "PCM unsigned 32-bit little-endian", NULL, U32LE)
171 PCMDEF(u24be, "PCM unsigned 24-bit big-endian", NULL, U24BE)
172 PCMDEF(u24le, "PCM unsigned 24-bit little-endian", NULL, U24LE)
173 PCMDEF(u16be, "PCM unsigned 16-bit big-endian", AV_NE("uw", NULL), U16BE)
174 PCMDEF(u16le, "PCM unsigned 16-bit little-endian", AV_NE(NULL, "uw"), U16LE)
175 PCMDEF(u8, "PCM unsigned 8-bit", "ub", U8)
176 PCMDEF(alaw, "PCM A-law", "al", ALAW)
177 PCMDEF(mulaw, "PCM mu-law", "ul", MULAW)
178 PCMDEF(vidc, "PCM Archimedes VIDC", NULL, VIDC)
179
180 #if CONFIG_SLN_DEMUXER
181 static const AVOption sln_options[] = {
182 { "sample_rate", "", offsetof(PCMAudioDemuxerContext, sample_rate), AV_OPT_TYPE_INT, {.i64 = 8000}, 0, INT_MAX, AV_OPT_FLAG_DECODING_PARAM },
183 #if FF_API_OLD_CHANNEL_LAYOUT
184 { "channels", "", offsetof(PCMAudioDemuxerContext, channels), AV_OPT_TYPE_INT, {.i64 = 1}, 0, INT_MAX, AV_OPT_FLAG_DECODING_PARAM | AV_OPT_FLAG_DEPRECATED },
185 { "ch_layout", "", offsetof(PCMAudioDemuxerContext, ch_layout), AV_OPT_TYPE_CHLAYOUT, {.str = NULL}, 0, 0, AV_OPT_FLAG_DECODING_PARAM },
186 #else
187 { "ch_layout", "", offsetof(PCMAudioDemuxerContext, ch_layout), AV_OPT_TYPE_CHLAYOUT, {.str = "mono"}, 0, 0, AV_OPT_FLAG_DECODING_PARAM },
188 #endif
189 { NULL },
190 };
191
192 static const AVClass sln_demuxer_class = {
193 .class_name = "sln demuxer",
194 .item_name = av_default_item_name,
195 .option = sln_options,
196 .version = LIBAVUTIL_VERSION_INT,
197 };
198
199 const AVInputFormat ff_sln_demuxer = {
200 .name = "sln",
201 .long_name = NULL_IF_CONFIG_SMALL("Asterisk raw pcm"),
202 .priv_data_size = sizeof(PCMAudioDemuxerContext),
203 .read_header = pcm_read_header,
204 .read_packet = ff_pcm_read_packet,
205 .read_seek = ff_pcm_read_seek,
206 .flags = AVFMT_GENERIC_INDEX,
207 .extensions = "sln",
208 .raw_codec_id = AV_CODEC_ID_PCM_S16LE,
209 .priv_class = &sln_demuxer_class,
210 };
211 #endif
212