FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavformat/idroqdec.c
Date: 2026-04-24 19:58:39
Exec Total Coverage
Lines: 95 111 85.6%
Functions: 3 3 100.0%
Branches: 34 49 69.4%
Line Branch Exec Source
1 /*
2 * id RoQ (.roq) File Demuxer
3 * Copyright (c) 2003 The FFmpeg project
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 * id RoQ format file demuxer
25 * by Mike Melanson (melanson@pcisys.net)
26 * for more information on the .roq file format, visit:
27 * http://www.csse.monash.edu.au/~timf/
28 */
29
30 #include "libavutil/channel_layout.h"
31 #include "libavutil/intreadwrite.h"
32 #include "avformat.h"
33 #include "demux.h"
34 #include "internal.h"
35 #include "avio_internal.h"
36
37 #define RoQ_MAGIC_NUMBER 0x1084
38 #define RoQ_CHUNK_PREAMBLE_SIZE 8
39 #define RoQ_AUDIO_SAMPLE_RATE 22050
40 #define RoQ_CHUNKS_TO_SCAN 30
41
42 #define RoQ_INFO 0x1001
43 #define RoQ_QUAD_CODEBOOK 0x1002
44 #define RoQ_QUAD_VQ 0x1011
45 #define RoQ_SOUND_MONO 0x1020
46 #define RoQ_SOUND_STEREO 0x1021
47
48 typedef struct RoqDemuxContext {
49
50 int frame_rate;
51 int width;
52 int height;
53 int audio_channels;
54
55 int video_stream_index;
56 int audio_stream_index;
57
58 int64_t video_pts;
59 unsigned int audio_frame_count;
60
61 } RoqDemuxContext;
62
63 7480 static int roq_probe(const AVProbeData *p)
64 {
65
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 7480 if ((AV_RL16(&p->buf[0]) != RoQ_MAGIC_NUMBER) ||
66
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 7 (AV_RL32(&p->buf[2]) != 0xFFFFFFFF))
67 7473 return 0;
68
69 7 return AVPROBE_SCORE_MAX;
70 }
71
72 7 static int roq_read_header(AVFormatContext *s)
73 {
74 7 RoqDemuxContext *roq = s->priv_data;
75 7 AVIOContext *pb = s->pb;
76 unsigned char preamble[RoQ_CHUNK_PREAMBLE_SIZE];
77 int ret;
78
79 /* get the main header */
80
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 7 if ((ret = ffio_read_size(pb, preamble, RoQ_CHUNK_PREAMBLE_SIZE)) < 0)
81 ✗ return ret;
82 7 roq->frame_rate = AV_RL16(&preamble[6]);
83
84 /* init private context parameters */
85 7 roq->width = roq->height = roq->audio_channels = roq->video_pts =
86 7 roq->audio_frame_count = 0;
87 7 roq->audio_stream_index = -1;
88 7 roq->video_stream_index = -1;
89
90 7 s->ctx_flags |= AVFMTCTX_NOHEADER;
91
92 7 return 0;
93 }
94
95 1113 static int roq_read_packet(AVFormatContext *s,
96 AVPacket *pkt)
97 {
98 1113 RoqDemuxContext *roq = s->priv_data;
99 1113 AVIOContext *pb = s->pb;
100 1113 int ret = 0;
101 unsigned int chunk_size;
102 unsigned int chunk_type;
103 unsigned int codebook_size;
104 unsigned char preamble[RoQ_CHUNK_PREAMBLE_SIZE];
105 1113 int packet_read = 0;
106 int64_t codebook_offset;
107
108
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 2222 while (!packet_read) {
109
110
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 1145 if (avio_feof(s->pb))
111 3 return AVERROR_EOF;
112
113 /* get the next chunk preamble */
114
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 1142 if ((ret = ffio_read_size(pb, preamble, RoQ_CHUNK_PREAMBLE_SIZE)) < 0)
115 33 return ret;
116
117 1109 chunk_type = AV_RL16(&preamble[0]);
118 1109 chunk_size = AV_RL32(&preamble[2]);
119
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 1109 if(chunk_size > INT_MAX)
120 ✗ return AVERROR_INVALIDDATA;
121
122 1109 chunk_size = ffio_limit(pb, chunk_size);
123
124
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 1109 switch (chunk_type) {
125
126 32 case RoQ_INFO:
127
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 32 if (roq->video_stream_index == -1) {
128 6 AVStream *st = avformat_new_stream(s, NULL);
129
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 6 if (!st)
130 ✗ return AVERROR(ENOMEM);
131 6 avpriv_set_pts_info(st, 63, 1, roq->frame_rate);
132 6 roq->video_stream_index = st->index;
133 6 st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
134 6 st->codecpar->codec_id = AV_CODEC_ID_ROQ;
135 6 st->codecpar->codec_tag = 0; /* no fourcc */
136
137
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 6 if ((ret = ffio_read_size(pb, preamble, RoQ_CHUNK_PREAMBLE_SIZE)) < 0)
138 ✗ return ret;
139 6 st->codecpar->width = roq->width = AV_RL16(preamble);
140 6 st->codecpar->height = roq->height = AV_RL16(preamble + 2);
141 6 break;
142 }
143 /* don't care about this chunk anymore */
144 26 avio_skip(pb, RoQ_CHUNK_PREAMBLE_SIZE);
145 26 break;
146
147 526 case RoQ_QUAD_CODEBOOK:
148
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 526 if (roq->video_stream_index < 0)
149 ✗ return AVERROR_INVALIDDATA;
150 /* packet needs to contain both this codebook and next VQ chunk */
151 526 codebook_offset = avio_tell(pb) - RoQ_CHUNK_PREAMBLE_SIZE;
152 526 codebook_size = chunk_size;
153 526 avio_skip(pb, codebook_size);
154
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 526 if ((ret = ffio_read_size(pb, preamble, RoQ_CHUNK_PREAMBLE_SIZE)) < 0)
155 ✗ return ret;
156 526 chunk_size = AV_RL32(&preamble[2]) + RoQ_CHUNK_PREAMBLE_SIZE * 2 +
157 codebook_size;
158
159
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 526 if (chunk_size > INT_MAX)
160 ✗ return AVERROR_INVALIDDATA;
161
162 /* rewind */
163 526 avio_seek(pb, codebook_offset, SEEK_SET);
164
165 /* load up the packet */
166 526 ret= av_get_packet(pb, pkt, chunk_size);
167
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 526 if (ret != chunk_size)
168 ✗ return AVERROR_INVALIDDATA;
169 526 pkt->stream_index = roq->video_stream_index;
170 526 pkt->pts = roq->video_pts++;
171
172 526 packet_read = 1;
173 526 break;
174
175 507 case RoQ_SOUND_MONO:
176 case RoQ_SOUND_STEREO:
177
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 507 if (roq->audio_stream_index == -1) {
178 3 AVStream *st = avformat_new_stream(s, NULL);
179
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 3 if (!st)
180 ✗ return AVERROR(ENOMEM);
181 3 avpriv_set_pts_info(st, 32, 1, RoQ_AUDIO_SAMPLE_RATE);
182 3 roq->audio_stream_index = st->index;
183 3 st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
184 3 st->codecpar->codec_id = AV_CODEC_ID_ROQ_DPCM;
185 3 st->codecpar->codec_tag = 0; /* no tag */
186
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 3 if (chunk_type == RoQ_SOUND_STEREO) {
187 3 st->codecpar->ch_layout = (AVChannelLayout)AV_CHANNEL_LAYOUT_STEREO;
188 } else {
189 ✗ st->codecpar->ch_layout = (AVChannelLayout)AV_CHANNEL_LAYOUT_MONO;
190 }
191 3 roq->audio_channels = st->codecpar->ch_layout.nb_channels;
192 3 st->codecpar->sample_rate = RoQ_AUDIO_SAMPLE_RATE;
193 3 st->codecpar->bits_per_coded_sample = 16;
194 3 st->codecpar->bit_rate = roq->audio_channels * st->codecpar->sample_rate *
195 3 st->codecpar->bits_per_coded_sample;
196 3 st->codecpar->block_align = roq->audio_channels * st->codecpar->bits_per_coded_sample;
197 }
198 case RoQ_QUAD_VQ:
199
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 551 if (chunk_type == RoQ_QUAD_VQ) {
200
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 44 if (roq->video_stream_index < 0)
201 ✗ return AVERROR_INVALIDDATA;
202 }
203
204 /* load up the packet */
205 551 ret = av_new_packet(pkt, chunk_size + RoQ_CHUNK_PREAMBLE_SIZE);
206
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 551 if (ret < 0)
207 ✗ return ret;
208 /* copy over preamble */
209 551 memcpy(pkt->data, preamble, RoQ_CHUNK_PREAMBLE_SIZE);
210
211
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 551 if (chunk_type == RoQ_QUAD_VQ) {
212 44 pkt->stream_index = roq->video_stream_index;
213 44 pkt->pts = roq->video_pts++;
214 } else {
215 507 pkt->stream_index = roq->audio_stream_index;
216 507 pkt->pts = roq->audio_frame_count;
217 507 roq->audio_frame_count += (chunk_size / roq->audio_channels);
218 }
219
220 551 pkt->pos= avio_tell(pb);
221 551 ret = ffio_read_size(pb, pkt->data + RoQ_CHUNK_PREAMBLE_SIZE,
222 chunk_size);
223
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 551 if (ret < 0)
224 ✗ return ret;
225
226 551 packet_read = 1;
227 551 break;
228
229 ✗ default:
230 ✗ av_log(s, AV_LOG_ERROR, " unknown RoQ chunk (%04X)\n", chunk_type);
231 ✗ return AVERROR_INVALIDDATA;
232 }
233 }
234
235 1077 return ret;
236 }
237
238 const FFInputFormat ff_roq_demuxer = {
239 .p.name = "roq",
240 .p.long_name = NULL_IF_CONFIG_SMALL("id RoQ"),
241 .priv_data_size = sizeof(RoqDemuxContext),
242 .read_probe = roq_probe,
243 .read_header = roq_read_header,
244 .read_packet = roq_read_packet,
245 };
246