FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavformat/smjpegenc.c
Date: 2025-10-28 01:11:23
Exec Total Coverage
Lines: 62 67 92.5%
Functions: 3 3 100.0%
Branches: 13 18 72.2%
Line Branch Exec Source
1 /*
2 * SMJPEG muxer
3 * Copyright (c) 2012 Paul B Mahol
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 /**
23 * @file
24 * This is a muxer for Loki SDL Motion JPEG files
25 */
26
27 #include "avformat.h"
28 #include "internal.h"
29 #include "mux.h"
30 #include "smjpeg.h"
31
32 typedef struct SMJPEGMuxContext {
33 uint32_t duration;
34 } SMJPEGMuxContext;
35
36 1 static int smjpeg_write_header(AVFormatContext *s)
37 {
38 1 const AVDictionaryEntry *t = NULL;
39 1 AVIOContext *pb = s->pb;
40 int n, tag;
41
42 1 avio_write(pb, SMJPEG_MAGIC, 8);
43 1 avio_wb32(pb, 0);
44 1 avio_wb32(pb, 0);
45
46 1 ff_standardize_creation_time(s);
47
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 2 while ((t = av_dict_iterate(s->metadata, t))) {
48 1 avio_wl32(pb, SMJPEG_TXT);
49 1 avio_wb32(pb, strlen(t->key) + strlen(t->value) + 3);
50 1 avio_write(pb, t->key, strlen(t->key));
51 1 avio_write(pb, " = ", 3);
52 1 avio_write(pb, t->value, strlen(t->value));
53 }
54
55
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 3 for (n = 0; n < s->nb_streams; n++) {
56 2 AVStream *st = s->streams[n];
57 2 AVCodecParameters *par = st->codecpar;
58
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 2 if (par->codec_type == AVMEDIA_TYPE_AUDIO) {
59 1 tag = ff_codec_get_tag(ff_codec_smjpeg_audio_tags, par->codec_id);
60
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 1 if (!tag) {
61 ✗ av_log(s, AV_LOG_ERROR, "unsupported audio codec\n");
62 ✗ return AVERROR(EINVAL);
63 }
64 1 avio_wl32(pb, SMJPEG_SND);
65 1 avio_wb32(pb, 8);
66 1 avio_wb16(pb, par->sample_rate);
67 1 avio_w8(pb, par->bits_per_coded_sample);
68 1 avio_w8(pb, par->ch_layout.nb_channels);
69 1 avio_wl32(pb, tag);
70 1 avpriv_set_pts_info(st, 32, 1, 1000);
71
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 1 } else if (par->codec_type == AVMEDIA_TYPE_VIDEO) {
72 1 tag = ff_codec_get_tag(ff_codec_smjpeg_video_tags, par->codec_id);
73
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 1 if (!tag) {
74 ✗ av_log(s, AV_LOG_ERROR, "unsupported video codec\n");
75 ✗ return AVERROR(EINVAL);
76 }
77 1 avio_wl32(pb, SMJPEG_VID);
78 1 avio_wb32(pb, 12);
79 1 avio_wb32(pb, 0);
80 1 avio_wb16(pb, par->width);
81 1 avio_wb16(pb, par->height);
82 1 avio_wl32(pb, tag);
83 1 avpriv_set_pts_info(st, 32, 1, 1000);
84 }
85 }
86
87 1 avio_wl32(pb, SMJPEG_HEND);
88
89 1 return 0;
90 }
91
92 36 static int smjpeg_write_packet(AVFormatContext *s, AVPacket *pkt)
93 {
94 36 SMJPEGMuxContext *smc = s->priv_data;
95 36 AVIOContext *pb = s->pb;
96 36 AVStream *st = s->streams[pkt->stream_index];
97 36 AVCodecParameters *par = st->codecpar;
98
99
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 36 if (par->codec_type == AVMEDIA_TYPE_AUDIO)
100 11 avio_wl32(pb, SMJPEG_SNDD);
101
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 25 else if (par->codec_type == AVMEDIA_TYPE_VIDEO)
102 25 avio_wl32(pb, SMJPEG_VIDD);
103 else
104 ✗ return 0;
105
106 36 avio_wb32(pb, pkt->pts);
107 36 avio_wb32(pb, pkt->size);
108 36 avio_write(pb, pkt->data, pkt->size);
109
110 36 smc->duration = FFMAX(smc->duration, pkt->pts + pkt->duration);
111 36 return 0;
112 }
113
114 1 static int smjpeg_write_trailer(AVFormatContext *s)
115 {
116 1 SMJPEGMuxContext *smc = s->priv_data;
117 1 AVIOContext *pb = s->pb;
118 int64_t currentpos;
119
120
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 1 if (pb->seekable & AVIO_SEEKABLE_NORMAL) {
121 1 currentpos = avio_tell(pb);
122 1 avio_seek(pb, 12, SEEK_SET);
123 1 avio_wb32(pb, smc->duration);
124 1 avio_seek(pb, currentpos, SEEK_SET);
125 }
126
127 1 avio_wl32(pb, SMJPEG_DONE);
128
129 1 return 0;
130 }
131
132 const FFOutputFormat ff_smjpeg_muxer = {
133 .p.name = "smjpeg",
134 .p.long_name = NULL_IF_CONFIG_SMALL("Loki SDL MJPEG"),
135 .priv_data_size = sizeof(SMJPEGMuxContext),
136 .p.audio_codec = AV_CODEC_ID_PCM_S16LE,
137 .p.video_codec = AV_CODEC_ID_MJPEG,
138 .p.subtitle_codec = AV_CODEC_ID_NONE,
139 .flags_internal = FF_OFMT_FLAG_MAX_ONE_OF_EACH,
140 .write_header = smjpeg_write_header,
141 .write_packet = smjpeg_write_packet,
142 .write_trailer = smjpeg_write_trailer,
143 .p.flags = AVFMT_GLOBALHEADER | AVFMT_TS_NONSTRICT,
144 .p.codec_tag = (const AVCodecTag *const []){ ff_codec_smjpeg_video_tags, ff_codec_smjpeg_audio_tags, 0 },
145 };
146