FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavformat/siff.c
Date: 2026-04-29 00:23:12
Exec Total Coverage
Lines: 95 138 68.8%
Functions: 5 6 83.3%
Branches: 43 78 55.1%
Line Branch Exec Source
1 /*
2 * Beam Software SIFF demuxer
3 * Copyright (c) 2007 Konstantin Shishkov
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 "libavutil/channel_layout.h"
23 #include "libavutil/intreadwrite.h"
24
25 #include "avformat.h"
26 #include "demux.h"
27 #include "internal.h"
28 #include "avio_internal.h"
29
30 enum SIFFTags {
31 TAG_SIFF = MKTAG('S', 'I', 'F', 'F'),
32 TAG_BODY = MKTAG('B', 'O', 'D', 'Y'),
33 TAG_VBHD = MKTAG('V', 'B', 'H', 'D'),
34 TAG_SHDR = MKTAG('S', 'H', 'D', 'R'),
35 TAG_VBV1 = MKTAG('V', 'B', 'V', '1'),
36 TAG_SOUN = MKTAG('S', 'O', 'U', 'N'),
37 };
38
39 enum VBFlags {
40 VB_HAS_GMC = 0x01,
41 VB_HAS_AUDIO = 0x04,
42 VB_HAS_VIDEO = 0x08,
43 VB_HAS_PALETTE = 0x10,
44 VB_HAS_LENGTH = 0x20
45 };
46
47 typedef struct SIFFContext {
48 int frames;
49 int cur_frame;
50 int rate;
51 int bits;
52 int block_align;
53
54 int has_video;
55 int has_audio;
56
57 int curstrm;
58 unsigned int pktsize;
59 int gmcsize;
60 unsigned int sndsize;
61
62 unsigned int flags;
63 uint8_t gmc[4];
64 } SIFFContext;
65
66 7480 static int siff_probe(const AVProbeData *p)
67 {
68 7480 uint32_t tag = AV_RL32(p->buf + 8);
69 /* check file header */
70
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 7480 if (AV_RL32(p->buf) != TAG_SIFF ||
71 ✗ (tag != TAG_VBV1 && tag != TAG_SOUN))
72 7478 return 0;
73 2 return AVPROBE_SCORE_MAX;
74 }
75
76 2 static int create_audio_stream(AVFormatContext *s, SIFFContext *c)
77 {
78 AVStream *ast;
79 2 ast = avformat_new_stream(s, NULL);
80
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 2 if (!ast)
81 ✗ return AVERROR(ENOMEM);
82 2 ast->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
83 2 ast->codecpar->codec_id = AV_CODEC_ID_PCM_U8;
84 2 ast->codecpar->ch_layout = (AVChannelLayout)AV_CHANNEL_LAYOUT_MONO;
85 2 ast->codecpar->bits_per_coded_sample = 8;
86 2 ast->codecpar->sample_rate = c->rate;
87 2 avpriv_set_pts_info(ast, 16, 1, c->rate);
88 2 ast->start_time = 0;
89 2 return 0;
90 }
91
92 2 static int siff_parse_vbv1(AVFormatContext *s, SIFFContext *c, AVIOContext *pb)
93 {
94 AVStream *st;
95 int width, height;
96
97
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 2 if (avio_rl32(pb) != TAG_VBHD) {
98 ✗ av_log(s, AV_LOG_ERROR, "Header chunk is missing\n");
99 ✗ return AVERROR_INVALIDDATA;
100 }
101
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 2 if (avio_rb32(pb) != 32) {
102 ✗ av_log(s, AV_LOG_ERROR, "Header chunk size is incorrect\n");
103 ✗ return AVERROR_INVALIDDATA;
104 }
105
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 2 if (avio_rl16(pb) != 1) {
106 ✗ av_log(s, AV_LOG_ERROR, "Incorrect header version\n");
107 ✗ return AVERROR_INVALIDDATA;
108 }
109 2 width = avio_rl16(pb);
110 2 height = avio_rl16(pb);
111 2 avio_skip(pb, 4);
112 2 c->frames = avio_rl16(pb);
113
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 2 if (!c->frames) {
114 ✗ av_log(s, AV_LOG_ERROR, "File contains no frames ???\n");
115 ✗ return AVERROR_INVALIDDATA;
116 }
117 2 c->bits = avio_rl16(pb);
118 2 c->rate = avio_rl16(pb);
119 2 c->block_align = c->rate * (c->bits >> 3);
120
121 2 avio_skip(pb, 16); // zeroes
122
123 2 st = avformat_new_stream(s, NULL);
124
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 2 if (!st)
125 ✗ return AVERROR(ENOMEM);
126 2 st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
127 2 st->codecpar->codec_id = AV_CODEC_ID_VB;
128 2 st->codecpar->codec_tag = MKTAG('V', 'B', 'V', '1');
129 2 st->codecpar->width = width;
130 2 st->codecpar->height = height;
131 2 st->codecpar->format = AV_PIX_FMT_PAL8;
132 2 st->nb_frames =
133 2 st->duration = c->frames;
134 2 avpriv_set_pts_info(st, 16, 1, 12);
135
136 2 c->cur_frame = 0;
137 2 c->has_video = 1;
138 2 c->has_audio = !!c->rate;
139 2 c->curstrm = -1;
140
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 2 if (c->has_audio)
141 2 return create_audio_stream(s, c);
142 ✗ return 0;
143 }
144
145 ✗ static int siff_parse_soun(AVFormatContext *s, SIFFContext *c, AVIOContext *pb)
146 {
147 ✗ if (avio_rl32(pb) != TAG_SHDR) {
148 ✗ av_log(s, AV_LOG_ERROR, "Header chunk is missing\n");
149 ✗ return AVERROR_INVALIDDATA;
150 }
151 ✗ if (avio_rb32(pb) != 8) {
152 ✗ av_log(s, AV_LOG_ERROR, "Header chunk size is incorrect\n");
153 ✗ return AVERROR_INVALIDDATA;
154 }
155 ✗ avio_skip(pb, 4); // unknown value
156 ✗ c->rate = avio_rl16(pb);
157 ✗ c->bits = avio_rl16(pb);
158 ✗ c->block_align = c->rate * (c->bits >> 3);
159 ✗ return create_audio_stream(s, c);
160 }
161
162 2 static int siff_read_header(AVFormatContext *s)
163 {
164 2 AVIOContext *pb = s->pb;
165 2 SIFFContext *c = s->priv_data;
166 uint32_t tag;
167 int ret;
168
169
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 2 if (avio_rl32(pb) != TAG_SIFF)
170 ✗ return AVERROR_INVALIDDATA;
171 2 avio_skip(pb, 4); // ignore size
172 2 tag = avio_rl32(pb);
173
174
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 2 if (tag != TAG_VBV1 && tag != TAG_SOUN) {
175 ✗ av_log(s, AV_LOG_ERROR, "Not a VBV file\n");
176 ✗ return AVERROR_INVALIDDATA;
177 }
178
179
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 2 if (tag == TAG_VBV1 && (ret = siff_parse_vbv1(s, c, pb)) < 0)
180 ✗ return ret;
181
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 2 if (tag == TAG_SOUN && (ret = siff_parse_soun(s, c, pb)) < 0)
182 ✗ return ret;
183
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 2 if (avio_rl32(pb) != MKTAG('B', 'O', 'D', 'Y')) {
184 ✗ av_log(s, AV_LOG_ERROR, "'BODY' chunk is missing\n");
185 ✗ return AVERROR_INVALIDDATA;
186 }
187 2 avio_skip(pb, 4); // ignore size
188
189 2 return 0;
190 }
191
192 181 static int siff_read_packet(AVFormatContext *s, AVPacket *pkt)
193 {
194 181 SIFFContext *c = s->priv_data;
195 int ret;
196
197
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 181 if (c->has_video) {
198 unsigned int size;
199
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 181 if (c->cur_frame >= c->frames)
200 1 return AVERROR_EOF;
201
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 180 if (c->curstrm == -1) {
202 163 unsigned pktsize = avio_rl32(s->pb);
203
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 163 if (pktsize < 4)
204 ✗ return AVERROR_INVALIDDATA;
205 163 c->pktsize = pktsize - 4;
206 163 c->flags = avio_rl16(s->pb);
207
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 163 if (c->flags & VB_HAS_AUDIO && !c->has_audio)
208 ✗ return AVERROR_INVALIDDATA;
209 163 c->gmcsize = (c->flags & VB_HAS_GMC) ? 4 : 0;
210
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 163 if (c->gmcsize)
211 20 avio_read(s->pb, c->gmc, c->gmcsize);
212
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 163 c->sndsize = (c->flags & VB_HAS_AUDIO) ? avio_rl32(s->pb) : 0;
213 163 c->curstrm = !!(c->flags & VB_HAS_AUDIO);
214 }
215
216
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 180 if (!c->curstrm) {
217
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 163 if (c->pktsize < 2LL + c->sndsize + c->gmcsize)
218 ✗ return AVERROR_INVALIDDATA;
219
220 163 size = c->pktsize - c->sndsize - c->gmcsize - 2;
221 163 size = ffio_limit(s->pb, size);
222
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 163 if ((ret = av_new_packet(pkt, size + c->gmcsize + 2)) < 0)
223 ✗ return ret;
224 163 AV_WL16(pkt->data, c->flags);
225
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 163 if (c->gmcsize)
226 20 memcpy(pkt->data + 2, c->gmc, c->gmcsize);
227
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 163 if (avio_read(s->pb, pkt->data + 2 + c->gmcsize, size) != size) {
228 ✗ return AVERROR_INVALIDDATA;
229 }
230 163 pkt->stream_index = 0;
231 163 c->curstrm = -1;
232 } else {
233 17 int pktsize = av_get_packet(s->pb, pkt, c->sndsize - 4);
234
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 17 if (pktsize < 0)
235 ✗ return AVERROR_INVALIDDATA;
236 17 pkt->stream_index = 1;
237 17 pkt->duration = pktsize;
238 17 c->curstrm = 0;
239 }
240
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 180 if (!c->cur_frame || c->curstrm)
241 165 pkt->flags |= AV_PKT_FLAG_KEY;
242
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 180 if (c->curstrm == -1)
243 163 c->cur_frame++;
244 } else {
245 ✗ int pktsize = av_get_packet(s->pb, pkt, c->block_align);
246 ✗ if (!pktsize)
247 ✗ return AVERROR_EOF;
248 ✗ if (pktsize <= 0)
249 ✗ return AVERROR_INVALIDDATA;
250 ✗ pkt->duration = pktsize;
251 }
252 180 return pkt->size;
253 }
254
255 const FFInputFormat ff_siff_demuxer = {
256 .p.name = "siff",
257 .p.long_name = NULL_IF_CONFIG_SMALL("Beam Software SIFF"),
258 .p.extensions = "vb,son",
259 .priv_data_size = sizeof(SIFFContext),
260 .read_probe = siff_probe,
261 .read_header = siff_read_header,
262 .read_packet = siff_read_packet,
263 };
264