FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavformat/smush.c
Date: 2026-04-24 19:58:39
Exec Total Coverage
Lines: 101 159 63.5%
Functions: 3 3 100.0%
Branches: 33 81 40.7%
Line Branch Exec Source
1 /*
2 * LucasArts Smush demuxer
3 * Copyright (c) 2006 Cyril Zorin
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/intreadwrite.h"
23
24 #include "avformat.h"
25 #include "avio.h"
26 #include "demux.h"
27 #include "internal.h"
28
29 typedef struct SMUSHContext {
30 int version;
31 int audio_stream_index;
32 int video_stream_index;
33 } SMUSHContext;
34
35 7480 static int smush_read_probe(const AVProbeData *p)
36 {
37
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 7480 if (((AV_RL32(p->buf) == MKTAG('S', 'A', 'N', 'M') &&
38
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 2 AV_RL32(p->buf + 8) == MKTAG('S', 'H', 'D', 'R')) ||
39
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 7478 (AV_RL32(p->buf) == MKTAG('A', 'N', 'I', 'M') &&
40 ✗ AV_RL32(p->buf + 8) == MKTAG('A', 'H', 'D', 'R')))) {
41 2 return AVPROBE_SCORE_MAX;
42 }
43
44 7478 return 0;
45 }
46
47 2 static int smush_read_header(AVFormatContext *ctx)
48 {
49 2 SMUSHContext *smush = ctx->priv_data;
50 2 AVIOContext *pb = ctx->pb;
51 AVStream *vst, *ast;
52 uint32_t magic, nframes, size, subversion, i;
53 2 uint32_t width = 0, height = 0, got_audio = 0, read = 0;
54 2 uint32_t sample_rate, channels, palette[256], frame_rate = 15;
55 int ret;
56
57 2 magic = avio_rb32(pb);
58 2 avio_skip(pb, 4); // skip movie size
59
60
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 2 if (magic == MKBETAG('A', 'N', 'I', 'M')) {
61 ✗ if (avio_rb32(pb) != MKBETAG('A', 'H', 'D', 'R'))
62 ✗ return AVERROR_INVALIDDATA;
63
64 ✗ size = avio_rb32(pb);
65 ✗ if (size < 3 * 256 + 6)
66 ✗ return AVERROR_INVALIDDATA;
67 ✗ size -= 3 * 256 + 6;
68
69 ✗ smush->version = 0;
70 ✗ subversion = avio_rl16(pb);
71 ✗ nframes = avio_rl16(pb);
72 ✗ if (!nframes)
73 ✗ return AVERROR_INVALIDDATA;
74
75 ✗ avio_skip(pb, 2); // skip pad
76
77 ✗ for (i = 0; i < 256; i++)
78 ✗ palette[i] = avio_rb24(pb);
79
80 ✗ if (subversion > 1) {
81 ✗ if (size < 12)
82 ✗ return AVERROR_INVALIDDATA;
83 ✗ size -= 12;
84 ✗ frame_rate = avio_rl32(pb);
85 ✗ avio_skip(pb, 4); // max size of FRME chunk in file
86 ✗ sample_rate = avio_rl32(pb);
87 ✗ if (frame_rate < 1 || frame_rate > 70)
88 ✗ frame_rate = 12;
89 }
90 ✗ avio_skip(pb, size);
91
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 2 } else if (magic == MKBETAG('S', 'A', 'N', 'M')) {
92
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 2 if (avio_rb32(pb) != MKBETAG('S', 'H', 'D', 'R'))
93 ✗ return AVERROR_INVALIDDATA;
94
95 2 size = avio_rb32(pb);
96
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 2 if (size < 14)
97 ✗ return AVERROR_INVALIDDATA;
98
99 2 smush->version = 1;
100 2 subversion = avio_rl16(pb);
101 2 nframes = avio_rl32(pb);
102
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 2 if (!nframes)
103 ✗ return AVERROR_INVALIDDATA;
104
105 2 avio_skip(pb, 2); // skip pad
106 2 width = avio_rl16(pb);
107 2 height = avio_rl16(pb);
108 2 avio_skip(pb, 2); // skip pad
109 2 avio_skip(pb, size - 14);
110
111
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 2 if (avio_rb32(pb) != MKBETAG('F', 'L', 'H', 'D'))
112 ✗ return AVERROR_INVALIDDATA;
113
114 2 size = avio_rb32(pb);
115
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 4 while (!got_audio && ((read + 8) < size)) {
116 uint32_t sig, chunk_size;
117
118
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 2 if (avio_feof(pb))
119 ✗ return AVERROR_EOF;
120
121 2 sig = avio_rb32(pb);
122 2 chunk_size = avio_rb32(pb);
123 2 read += 8;
124
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 2 switch (sig) {
125 2 case MKBETAG('W', 'a', 'v', 'e'):
126 2 got_audio = 1;
127 2 sample_rate = avio_rl32(pb);
128
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 2 if (!sample_rate)
129 ✗ return AVERROR_INVALIDDATA;
130
131 2 channels = avio_rl32(pb);
132
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 2 if (!channels)
133 ✗ return AVERROR_INVALIDDATA;
134
135 2 avio_skip(pb, chunk_size - 8);
136 2 read += chunk_size;
137 2 break;
138 ✗ case MKBETAG('B', 'l', '1', '6'):
139 case MKBETAG('A', 'N', 'N', 'O'):
140 ✗ avio_skip(pb, chunk_size);
141 ✗ read += chunk_size;
142 ✗ break;
143 ✗ default:
144 ✗ return AVERROR_INVALIDDATA;
145 }
146 }
147
148 2 avio_skip(pb, size - read);
149 } else {
150 ✗ av_log(ctx, AV_LOG_ERROR, "Wrong magic\n");
151 ✗ return AVERROR_INVALIDDATA;
152 }
153
154 2 vst = avformat_new_stream(ctx, 0);
155
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 2 if (!vst)
156 ✗ return AVERROR(ENOMEM);
157
158 2 smush->video_stream_index = vst->index;
159
160 2 avpriv_set_pts_info(vst, 64, 1, frame_rate);
161
162 2 vst->start_time = 0;
163 2 vst->duration =
164 2 vst->nb_frames = nframes;
165 2 vst->avg_frame_rate = av_inv_q(vst->time_base);
166 2 vst->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
167 2 vst->codecpar->codec_id = AV_CODEC_ID_SANM;
168 2 vst->codecpar->codec_tag = 0;
169 2 vst->codecpar->width = width;
170 2 vst->codecpar->height = height;
171
172
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 2 if (!smush->version) {
173 ✗ if ((ret = ff_alloc_extradata(vst->codecpar, 1024 + 2)) < 0)
174 ✗ return ret;
175
176 ✗ AV_WL16(vst->codecpar->extradata, subversion);
177 ✗ for (i = 0; i < 256; i++)
178 ✗ AV_WL32(vst->codecpar->extradata + 2 + i * 4, palette[i]);
179 }
180
181
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 2 if (got_audio) {
182 2 ast = avformat_new_stream(ctx, 0);
183
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 2 if (!ast)
184 ✗ return AVERROR(ENOMEM);
185
186 2 smush->audio_stream_index = ast->index;
187
188 2 ast->start_time = 0;
189 2 ast->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
190 2 ast->codecpar->codec_id = AV_CODEC_ID_ADPCM_VIMA;
191 2 ast->codecpar->codec_tag = 0;
192 2 ast->codecpar->sample_rate = sample_rate;
193 2 ast->codecpar->ch_layout.nb_channels = channels;
194 2 avpriv_set_pts_info(ast, 64, 1, ast->codecpar->sample_rate);
195 }
196
197 2 return 0;
198 }
199
200 68 static int smush_read_packet(AVFormatContext *ctx, AVPacket *pkt)
201 {
202 68 SMUSHContext *smush = ctx->priv_data;
203 68 AVIOContext *pb = ctx->pb;
204 68 int done = 0;
205 int ret;
206
207
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 164 while (!done) {
208 uint32_t sig, size;
209
210
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 100 if (avio_feof(pb))
211 4 return AVERROR_EOF;
212
213 96 sig = avio_rb32(pb);
214 96 size = avio_rb32(pb);
215
216
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 96 switch (sig) {
217 32 case MKBETAG('F', 'R', 'M', 'E'):
218
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 32 if (smush->version)
219 32 break;
220 ✗ if ((ret = av_get_packet(pb, pkt, size)) < 0)
221 ✗ return ret;
222
223 ✗ pkt->stream_index = smush->video_stream_index;
224 ✗ done = 1;
225 ✗ break;
226 32 case MKBETAG('B', 'l', '1', '6'):
227
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 32 if ((ret = av_get_packet(pb, pkt, size)) < 0)
228 ✗ return ret;
229
230 32 pkt->stream_index = smush->video_stream_index;
231 32 pkt->duration = 1;
232 32 done = 1;
233 32 break;
234 32 case MKBETAG('W', 'a', 'v', 'e'):
235
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 32 if (size < 13)
236 ✗ return AVERROR_INVALIDDATA;
237
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 32 if (av_get_packet(pb, pkt, size) < 13)
238 ✗ return AVERROR_INVALIDDATA;
239
240 32 pkt->stream_index = smush->audio_stream_index;
241 32 pkt->flags |= AV_PKT_FLAG_KEY;
242 32 pkt->duration = AV_RB32(pkt->data);
243
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 32 if (pkt->duration == 0xFFFFFFFFu)
244 32 pkt->duration = AV_RB32(pkt->data + 8);
245 32 done = 1;
246 32 break;
247 ✗ default:
248 ✗ avio_skip(pb, size);
249 ✗ break;
250 }
251 }
252
253 64 return 0;
254 }
255
256 const FFInputFormat ff_smush_demuxer = {
257 .p.name = "smush",
258 .p.long_name = NULL_IF_CONFIG_SMALL("LucasArts Smush"),
259 .priv_data_size = sizeof(SMUSHContext),
260 .read_probe = smush_read_probe,
261 .read_header = smush_read_header,
262 .read_packet = smush_read_packet,
263 };
264