FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavformat/vqf.c
Date: 2025-04-25 22:50:00
Exec Total Coverage
Lines: 86 150 57.3%
Functions: 4 5 80.0%
Branches: 28 65 43.1%
Line Branch Exec Source
1 /*
2 * VQF demuxer
3 * Copyright (c) 2009 Vitor Sessak
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 "avformat.h"
23 #include "avio_internal.h"
24 #include "demux.h"
25 #include "internal.h"
26 #include "libavutil/intreadwrite.h"
27 #include "libavutil/dict.h"
28 #include "libavutil/mathematics.h"
29 #include "libavutil/mem.h"
30 #include "metadata.h"
31
32 typedef struct VqfContext {
33 int frame_bit_len;
34 uint8_t last_frame_bits;
35 int remaining_bits;
36 } VqfContext;
37
38 7211 static int vqf_probe(const AVProbeData *probe_packet)
39 {
40
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 7211 if (AV_RL32(probe_packet->buf) != MKTAG('T','W','I','N'))
41 7209 return 0;
42
43
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 2 if (!memcmp(probe_packet->buf + 4, "97012000", 8))
44 2 return AVPROBE_SCORE_MAX;
45
46 ✗ if (!memcmp(probe_packet->buf + 4, "00052200", 8))
47 ✗ return AVPROBE_SCORE_MAX;
48
49 ✗ if (AV_RL32(probe_packet->buf + 12) > (1<<27))
50 ✗ return AVPROBE_SCORE_EXTENSION/2;
51
52 ✗ return AVPROBE_SCORE_EXTENSION;
53 }
54
55 10 static int add_metadata(AVFormatContext *s, uint32_t tag,
56 unsigned int tag_len, unsigned int remaining)
57 {
58 10 int len = FFMIN(tag_len, remaining);
59 10 char *buf, key[5] = {0};
60 int ret;
61
62
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 10 if (len == UINT_MAX)
63 ✗ return AVERROR_INVALIDDATA;
64
65 10 buf = av_malloc(len+1);
66
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 10 if (!buf)
67 ✗ return AVERROR(ENOMEM);
68
69 10 ret = ffio_read_size(s->pb, buf, len);
70
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 10 if (ret < 0) {
71 ✗ av_free(buf);
72 ✗ return ret;
73 }
74 10 buf[len] = 0;
75 10 AV_WL32(key, tag);
76 10 return av_dict_set(&s->metadata, key, buf, AV_DICT_DONT_STRDUP_VAL);
77 }
78
79 static const AVMetadataConv vqf_metadata_conv[] = {
80 { "(c) ", "copyright" },
81 { "ARNG", "arranger" },
82 { "AUTH", "author" },
83 { "BAND", "band" },
84 { "CDCT", "conductor" },
85 { "COMT", "comment" },
86 { "FILE", "filename" },
87 { "GENR", "genre" },
88 { "LABL", "publisher" },
89 { "MUSC", "composer" },
90 { "NAME", "title" },
91 { "NOTE", "note" },
92 { "PROD", "producer" },
93 { "PRSN", "personnel" },
94 { "REMX", "remixer" },
95 { "SING", "singer" },
96 { "TRCK", "track" },
97 { "WORD", "words" },
98 { 0 },
99 };
100
101 2 static int vqf_read_header(AVFormatContext *s)
102 {
103 2 VqfContext *c = s->priv_data;
104 2 AVStream *st = avformat_new_stream(s, NULL);
105 int chunk_tag;
106 2 int rate_flag = -1;
107 int header_size;
108 2 int read_bitrate = 0;
109 int size, ret;
110 uint8_t comm_chunk[12];
111
112
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 2 if (!st)
113 ✗ return AVERROR(ENOMEM);
114
115 2 avio_skip(s->pb, 12);
116
117 2 header_size = avio_rb32(s->pb);
118
119
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 2 if (header_size < 0)
120 ✗ return AVERROR_INVALIDDATA;
121
122 2 st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
123 2 st->codecpar->codec_id = AV_CODEC_ID_TWINVQ;
124 2 st->start_time = 0;
125
126 do {
127 int len;
128 16 chunk_tag = avio_rl32(s->pb);
129
130
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 16 if (chunk_tag == MKTAG('D','A','T','A'))
131 2 break;
132
133 14 len = avio_rb32(s->pb);
134
135
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 14 if ((unsigned) len > INT_MAX/2 || header_size < 8) {
136 ✗ av_log(s, AV_LOG_ERROR, "Malformed header\n");
137 ✗ return -1;
138 }
139
140 14 header_size -= 8;
141
142
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 14 switch(chunk_tag){
143 2 case MKTAG('C','O','M','M'):
144
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 2 if (len < 12)
145 ✗ return AVERROR_INVALIDDATA;
146
147 2 avio_read(s->pb, comm_chunk, 12);
148 2 st->codecpar->ch_layout.nb_channels = AV_RB32(comm_chunk) + 1;
149 2 read_bitrate = AV_RB32(comm_chunk + 4);
150 2 rate_flag = AV_RB32(comm_chunk + 8);
151 2 avio_skip(s->pb, len-12);
152
153
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 2 if (st->codecpar->ch_layout.nb_channels <= 0) {
154 ✗ av_log(s, AV_LOG_ERROR, "Invalid number of channels\n");
155 ✗ return AVERROR_INVALIDDATA;
156 }
157
158 2 st->codecpar->bit_rate = (int64_t)read_bitrate * 1000;
159 2 break;
160 2 case MKTAG('D','S','I','Z'): // size of compressed data
161 {
162 2 av_dict_set_int(&s->metadata, "size", avio_rb32(s->pb), 0);
163 }
164 2 break;
165 ✗ case MKTAG('Y','E','A','R'): // recording date
166 case MKTAG('E','N','C','D'): // compression date
167 case MKTAG('E','X','T','R'): // reserved
168 case MKTAG('_','Y','M','H'): // reserved
169 case MKTAG('_','N','T','T'): // reserved
170 case MKTAG('_','I','D','3'): // reserved for ID3 tags
171 ✗ avio_skip(s->pb, FFMIN(len, header_size));
172 ✗ break;
173 10 default:
174 10 ret = add_metadata(s, chunk_tag, len, header_size);
175
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 10 if (ret < 0)
176 ✗ return ret;
177 10 break;
178 }
179
180 14 header_size -= len;
181
182
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 14 } while (header_size >= 0 && !avio_feof(s->pb));
183
184
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 2 switch (rate_flag) {
185 ✗ case -1:
186 ✗ av_log(s, AV_LOG_ERROR, "COMM tag not found!\n");
187 ✗ return -1;
188 ✗ case 44:
189 ✗ st->codecpar->sample_rate = 44100;
190 ✗ break;
191 2 case 22:
192 2 st->codecpar->sample_rate = 22050;
193 2 break;
194 ✗ case 11:
195 ✗ st->codecpar->sample_rate = 11025;
196 ✗ break;
197 ✗ default:
198 ✗ if (rate_flag < 8 || rate_flag > 44) {
199 ✗ av_log(s, AV_LOG_ERROR, "Invalid rate flag %d\n", rate_flag);
200 ✗ return AVERROR_INVALIDDATA;
201 }
202 ✗ st->codecpar->sample_rate = rate_flag*1000;
203 ✗ break;
204 }
205
206
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 2 if (read_bitrate / st->codecpar->ch_layout.nb_channels < 8 ||
207
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 2 read_bitrate / st->codecpar->ch_layout.nb_channels > 48) {
208 ✗ av_log(s, AV_LOG_ERROR, "Invalid bitrate per channel %d\n",
209 ✗ read_bitrate / st->codecpar->ch_layout.nb_channels);
210 ✗ return AVERROR_INVALIDDATA;
211 }
212
213 2 switch (((st->codecpar->sample_rate/1000) << 8) +
214
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 2 read_bitrate/st->codecpar->ch_layout.nb_channels) {
215 ✗ case (11<<8) + 8 :
216 case (8 <<8) + 8 :
217 case (11<<8) + 10:
218 case (22<<8) + 32:
219 ✗ size = 512;
220 ✗ break;
221 2 case (16<<8) + 16:
222 case (22<<8) + 20:
223 case (22<<8) + 24:
224 2 size = 1024;
225 2 break;
226 ✗ case (44<<8) + 40:
227 case (44<<8) + 48:
228 ✗ size = 2048;
229 ✗ break;
230 ✗ default:
231 ✗ av_log(s, AV_LOG_ERROR, "Mode not supported: %d Hz, %"PRId64" kb/s.\n",
232 ✗ st->codecpar->sample_rate, st->codecpar->bit_rate);
233 ✗ return -1;
234 }
235 2 c->frame_bit_len = st->codecpar->bit_rate*size/st->codecpar->sample_rate;
236 2 avpriv_set_pts_info(st, 64, size, st->codecpar->sample_rate);
237
238 /* put first 12 bytes of COMM chunk in extradata */
239
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 2 if ((ret = ff_alloc_extradata(st->codecpar, 12)) < 0)
240 ✗ return ret;
241 2 memcpy(st->codecpar->extradata, comm_chunk, 12);
242
243 2 ff_metadata_conv_ctx(s, NULL, vqf_metadata_conv);
244
245 2 return 0;
246 }
247
248 5178 static int vqf_read_packet(AVFormatContext *s, AVPacket *pkt)
249 {
250 5178 VqfContext *c = s->priv_data;
251 int ret;
252 5178 int size = (c->frame_bit_len - c->remaining_bits + 7)>>3;
253
254
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 5178 if ((ret = av_new_packet(pkt, size + 2)) < 0)
255 ✗ return ret;
256
257 5178 pkt->pos = avio_tell(s->pb);
258 5178 pkt->stream_index = 0;
259 5178 pkt->duration = 1;
260
261 5178 pkt->data[0] = 8 - c->remaining_bits; // Number of bits to skip
262 5178 pkt->data[1] = c->last_frame_bits;
263 5178 ret = ffio_read_size(s->pb, pkt->data + 2, size);
264
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 5178 if (ret < 0)
265 2 return ret;
266
267 5176 c->last_frame_bits = pkt->data[size+1];
268 5176 c->remaining_bits = (size << 3) - c->frame_bit_len + c->remaining_bits;
269
270 5176 return 0;
271 }
272
273 ✗ static int vqf_read_seek(AVFormatContext *s,
274 int stream_index, int64_t timestamp, int flags)
275 {
276 ✗ VqfContext *c = s->priv_data;
277 AVStream *st;
278 int64_t ret;
279 int64_t pos;
280
281 ✗ st = s->streams[stream_index];
282 ✗ pos = av_rescale_rnd(timestamp * st->codecpar->bit_rate,
283 ✗ st->time_base.num,
284 ✗ st->time_base.den * (int64_t)c->frame_bit_len,
285 ✗ (flags & AVSEEK_FLAG_BACKWARD) ?
286 AV_ROUND_DOWN : AV_ROUND_UP);
287 ✗ pos *= c->frame_bit_len;
288
289 ✗ ffstream(st)->cur_dts = av_rescale(pos, st->time_base.den,
290 ✗ st->codecpar->bit_rate * (int64_t)st->time_base.num);
291
292 ✗ if ((ret = avio_seek(s->pb, ((pos-7) >> 3) + ffformatcontext(s)->data_offset, SEEK_SET)) < 0)
293 ✗ return ret;
294
295 ✗ c->remaining_bits = -7 - ((pos-7)&7);
296 ✗ return 0;
297 }
298
299 const FFInputFormat ff_vqf_demuxer = {
300 .p.name = "vqf",
301 .p.long_name = NULL_IF_CONFIG_SMALL("Nippon Telegraph and Telephone Corporation (NTT) TwinVQ"),
302 .p.extensions = "vqf,vql,vqe",
303 .priv_data_size = sizeof(VqfContext),
304 .read_probe = vqf_probe,
305 .read_header = vqf_read_header,
306 .read_packet = vqf_read_packet,
307 .read_seek = vqf_read_seek,
308 };
309