Line | Branch | Exec | Source |
---|---|---|---|
1 | /* | ||
2 | * 4X Technologies .4xm File Demuxer (no muxer) | ||
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 | * 4X Technologies file demuxer | ||
25 | * by Mike Melanson (melanson@pcisys.net) | ||
26 | * for more information on the .4xm file format, visit: | ||
27 | * http://www.pcisys.net/~melanson/codecs/ | ||
28 | */ | ||
29 | |||
30 | #include "libavutil/intreadwrite.h" | ||
31 | #include "libavutil/intfloat.h" | ||
32 | #include "libavcodec/internal.h" | ||
33 | #include "avformat.h" | ||
34 | #include "demux.h" | ||
35 | #include "internal.h" | ||
36 | |||
37 | #define RIFF_TAG MKTAG('R', 'I', 'F', 'F') | ||
38 | #define FOURXMV_TAG MKTAG('4', 'X', 'M', 'V') | ||
39 | #define LIST_TAG MKTAG('L', 'I', 'S', 'T') | ||
40 | #define HEAD_TAG MKTAG('H', 'E', 'A', 'D') | ||
41 | #define TRK__TAG MKTAG('T', 'R', 'K', '_') | ||
42 | #define MOVI_TAG MKTAG('M', 'O', 'V', 'I') | ||
43 | #define VTRK_TAG MKTAG('V', 'T', 'R', 'K') | ||
44 | #define STRK_TAG MKTAG('S', 'T', 'R', 'K') | ||
45 | #define std__TAG MKTAG('s', 't', 'd', '_') | ||
46 | #define name_TAG MKTAG('n', 'a', 'm', 'e') | ||
47 | #define vtrk_TAG MKTAG('v', 't', 'r', 'k') | ||
48 | #define strk_TAG MKTAG('s', 't', 'r', 'k') | ||
49 | #define ifrm_TAG MKTAG('i', 'f', 'r', 'm') | ||
50 | #define pfrm_TAG MKTAG('p', 'f', 'r', 'm') | ||
51 | #define cfrm_TAG MKTAG('c', 'f', 'r', 'm') | ||
52 | #define ifr2_TAG MKTAG('i', 'f', 'r', '2') | ||
53 | #define pfr2_TAG MKTAG('p', 'f', 'r', '2') | ||
54 | #define cfr2_TAG MKTAG('c', 'f', 'r', '2') | ||
55 | #define snd__TAG MKTAG('s', 'n', 'd', '_') | ||
56 | |||
57 | #define vtrk_SIZE 0x44 | ||
58 | #define strk_SIZE 0x28 | ||
59 | |||
60 | #define GET_LIST_HEADER() \ | ||
61 | fourcc_tag = avio_rl32(pb); \ | ||
62 | size = avio_rl32(pb); \ | ||
63 | if (fourcc_tag != LIST_TAG) { \ | ||
64 | ret = AVERROR_INVALIDDATA; \ | ||
65 | goto fail; \ | ||
66 | } \ | ||
67 | fourcc_tag = avio_rl32(pb); | ||
68 | |||
69 | typedef struct AudioTrack { | ||
70 | int sample_rate; | ||
71 | int bits; | ||
72 | int channels; | ||
73 | int stream_index; | ||
74 | int adpcm; | ||
75 | int64_t audio_pts; | ||
76 | } AudioTrack; | ||
77 | |||
78 | typedef struct FourxmDemuxContext { | ||
79 | int video_stream_index; | ||
80 | int track_count; | ||
81 | AudioTrack *tracks; | ||
82 | |||
83 | int64_t video_pts; | ||
84 | AVRational fps; | ||
85 | } FourxmDemuxContext; | ||
86 | |||
87 | 7124 | static int fourxm_probe(const AVProbeData *p) | |
88 | { | ||
89 |
2/2✓ Branch 0 taken 949 times.
✓ Branch 1 taken 6175 times.
|
7124 | if ((AV_RL32(&p->buf[0]) != RIFF_TAG) || |
90 |
2/2✓ Branch 0 taken 946 times.
✓ Branch 1 taken 3 times.
|
949 | (AV_RL32(&p->buf[8]) != FOURXMV_TAG)) |
91 | 7121 | return 0; | |
92 | |||
93 | 3 | return AVPROBE_SCORE_MAX; | |
94 | } | ||
95 | |||
96 | 3 | static int parse_vtrk(AVFormatContext *s, | |
97 | FourxmDemuxContext *fourxm, uint8_t *buf, int size, | ||
98 | int left) | ||
99 | { | ||
100 | AVStream *st; | ||
101 | /* check that there is enough data */ | ||
102 |
2/4✓ Branch 0 taken 3 times.
✗ Branch 1 not taken.
✗ Branch 2 not taken.
✓ Branch 3 taken 3 times.
|
3 | if (size != vtrk_SIZE || left < size + 8) { |
103 | ✗ | return AVERROR_INVALIDDATA; | |
104 | } | ||
105 | |||
106 | /* allocate a new AVStream */ | ||
107 | 3 | st = avformat_new_stream(s, NULL); | |
108 |
1/2✗ Branch 0 not taken.
✓ Branch 1 taken 3 times.
|
3 | if (!st) |
109 | ✗ | return AVERROR(ENOMEM); | |
110 | |||
111 | 3 | avpriv_set_pts_info(st, 60, fourxm->fps.den, fourxm->fps.num); | |
112 | |||
113 | 3 | fourxm->video_stream_index = st->index; | |
114 | |||
115 | 3 | st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO; | |
116 | 3 | st->codecpar->codec_id = AV_CODEC_ID_4XM; | |
117 | |||
118 | 3 | st->codecpar->extradata = av_mallocz(4 + AV_INPUT_BUFFER_PADDING_SIZE); | |
119 |
1/2✗ Branch 0 not taken.
✓ Branch 1 taken 3 times.
|
3 | if (!st->codecpar->extradata) |
120 | ✗ | return AVERROR(ENOMEM); | |
121 | 3 | st->codecpar->extradata_size = 4; | |
122 | 3 | AV_WL32(st->codecpar->extradata, AV_RL32(buf + 16)); | |
123 | 3 | st->codecpar->width = AV_RL32(buf + 36); | |
124 | 3 | st->codecpar->height = AV_RL32(buf + 40); | |
125 | |||
126 | 3 | return 0; | |
127 | } | ||
128 | |||
129 | |||
130 | 8 | static int parse_strk(AVFormatContext *s, | |
131 | FourxmDemuxContext *fourxm, uint8_t *buf, int size, | ||
132 | int left) | ||
133 | { | ||
134 | AVStream *st; | ||
135 | int track; | ||
136 | /* check that there is enough data */ | ||
137 |
2/4✓ Branch 0 taken 8 times.
✗ Branch 1 not taken.
✗ Branch 2 not taken.
✓ Branch 3 taken 8 times.
|
8 | if (size != strk_SIZE || left < size + 8) |
138 | ✗ | return AVERROR_INVALIDDATA; | |
139 | |||
140 | 8 | track = AV_RL32(buf + 8); | |
141 |
1/2✓ Branch 0 taken 8 times.
✗ Branch 1 not taken.
|
8 | if ((unsigned)track >= UINT_MAX / sizeof(AudioTrack) - 1 || |
142 |
1/2✗ Branch 0 not taken.
✓ Branch 1 taken 8 times.
|
8 | track >= s->max_streams) { |
143 | ✗ | av_log(s, AV_LOG_ERROR, "current_track too large\n"); | |
144 | ✗ | return AVERROR_INVALIDDATA; | |
145 | } | ||
146 | |||
147 |
1/2✓ Branch 0 taken 8 times.
✗ Branch 1 not taken.
|
8 | if (track + 1 > fourxm->track_count) { |
148 |
1/2✗ Branch 1 not taken.
✓ Branch 2 taken 8 times.
|
8 | if (av_reallocp_array(&fourxm->tracks, track + 1, sizeof(AudioTrack))) |
149 | ✗ | return AVERROR(ENOMEM); | |
150 | 8 | memset(&fourxm->tracks[fourxm->track_count], 0, | |
151 | 8 | sizeof(AudioTrack) * (track + 1 - fourxm->track_count)); | |
152 | 8 | fourxm->track_count = track + 1; | |
153 | } else { | ||
154 | ✗ | if (fourxm->tracks[track].bits) | |
155 | ✗ | return AVERROR_INVALIDDATA; | |
156 | } | ||
157 | 8 | fourxm->tracks[track].adpcm = AV_RL32(buf + 12); | |
158 | 8 | fourxm->tracks[track].channels = AV_RL32(buf + 36); | |
159 | 8 | fourxm->tracks[track].sample_rate = AV_RL32(buf + 40); | |
160 | 8 | fourxm->tracks[track].bits = AV_RL32(buf + 44); | |
161 | 8 | fourxm->tracks[track].audio_pts = 0; | |
162 | |||
163 |
1/2✓ Branch 0 taken 8 times.
✗ Branch 1 not taken.
|
8 | if (fourxm->tracks[track].channels <= 0 || |
164 |
1/2✓ Branch 0 taken 8 times.
✗ Branch 1 not taken.
|
8 | fourxm->tracks[track].channels > FF_SANE_NB_CHANNELS || |
165 |
1/2✓ Branch 0 taken 8 times.
✗ Branch 1 not taken.
|
8 | fourxm->tracks[track].sample_rate <= 0 || |
166 |
1/2✓ Branch 0 taken 8 times.
✗ Branch 1 not taken.
|
8 | fourxm->tracks[track].bits <= 0 || |
167 |
1/2✗ Branch 0 not taken.
✓ Branch 1 taken 8 times.
|
8 | fourxm->tracks[track].bits > INT_MAX / FF_SANE_NB_CHANNELS) { |
168 | ✗ | av_log(s, AV_LOG_ERROR, "audio header invalid\n"); | |
169 | ✗ | return AVERROR_INVALIDDATA; | |
170 | } | ||
171 |
3/4✓ Branch 0 taken 1 times.
✓ Branch 1 taken 7 times.
✗ Branch 2 not taken.
✓ Branch 3 taken 1 times.
|
8 | if (!fourxm->tracks[track].adpcm && fourxm->tracks[track].bits<8) { |
172 | ✗ | av_log(s, AV_LOG_ERROR, "bits unspecified for non ADPCM\n"); | |
173 | ✗ | return AVERROR_INVALIDDATA; | |
174 | } | ||
175 | |||
176 |
1/2✗ Branch 0 not taken.
✓ Branch 1 taken 8 times.
|
8 | if (fourxm->tracks[track].sample_rate > INT64_MAX / fourxm->tracks[track].bits / fourxm->tracks[track].channels) { |
177 | ✗ | av_log(s, AV_LOG_ERROR, "Overflow during bit rate calculation %d * %d * %d\n", | |
178 | ✗ | fourxm->tracks[track].sample_rate, fourxm->tracks[track].bits, fourxm->tracks[track].channels); | |
179 | ✗ | return AVERROR_INVALIDDATA; | |
180 | } | ||
181 | |||
182 | /* allocate a new AVStream */ | ||
183 | 8 | st = avformat_new_stream(s, NULL); | |
184 |
1/2✗ Branch 0 not taken.
✓ Branch 1 taken 8 times.
|
8 | if (!st) |
185 | ✗ | return AVERROR(ENOMEM); | |
186 | |||
187 | 8 | st->id = track; | |
188 | 8 | avpriv_set_pts_info(st, 60, 1, fourxm->tracks[track].sample_rate); | |
189 | |||
190 | 8 | fourxm->tracks[track].stream_index = st->index; | |
191 | |||
192 | 8 | st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO; | |
193 | 8 | st->codecpar->codec_tag = 0; | |
194 | 8 | st->codecpar->ch_layout.nb_channels = fourxm->tracks[track].channels; | |
195 | 8 | st->codecpar->sample_rate = fourxm->tracks[track].sample_rate; | |
196 | 8 | st->codecpar->bits_per_coded_sample = fourxm->tracks[track].bits; | |
197 | 8 | st->codecpar->bit_rate = (int64_t)st->codecpar->ch_layout.nb_channels * | |
198 | 8 | st->codecpar->sample_rate * | |
199 | 8 | st->codecpar->bits_per_coded_sample; | |
200 | 8 | st->codecpar->block_align = st->codecpar->ch_layout.nb_channels * | |
201 | 8 | st->codecpar->bits_per_coded_sample; | |
202 | |||
203 |
2/2✓ Branch 0 taken 7 times.
✓ Branch 1 taken 1 times.
|
8 | if (fourxm->tracks[track].adpcm){ |
204 | 7 | st->codecpar->codec_id = AV_CODEC_ID_ADPCM_4XM; | |
205 |
1/2✗ Branch 0 not taken.
✓ Branch 1 taken 1 times.
|
1 | } else if (st->codecpar->bits_per_coded_sample == 8) { |
206 | ✗ | st->codecpar->codec_id = AV_CODEC_ID_PCM_U8; | |
207 | } else | ||
208 | 1 | st->codecpar->codec_id = AV_CODEC_ID_PCM_S16LE; | |
209 | |||
210 | 8 | return 0; | |
211 | } | ||
212 | |||
213 | 3 | static int fourxm_read_header(AVFormatContext *s) | |
214 | { | ||
215 | 3 | AVIOContext *pb = s->pb; | |
216 | unsigned int fourcc_tag; | ||
217 | unsigned int size; | ||
218 | int header_size; | ||
219 | 3 | FourxmDemuxContext *fourxm = s->priv_data; | |
220 | 3 | unsigned char *header = NULL; | |
221 | int i, ret; | ||
222 | |||
223 | 3 | fourxm->track_count = 0; | |
224 | 3 | fourxm->tracks = NULL; | |
225 | 3 | fourxm->fps = (AVRational){1,1}; | |
226 | 3 | fourxm->video_stream_index = -1; | |
227 | |||
228 | /* skip the first 3 32-bit numbers */ | ||
229 | 3 | avio_skip(pb, 12); | |
230 | |||
231 | /* check for LIST-HEAD */ | ||
232 |
1/2✗ Branch 2 not taken.
✓ Branch 3 taken 3 times.
|
3 | GET_LIST_HEADER(); |
233 | 3 | header_size = size - 4; | |
234 |
2/4✓ Branch 0 taken 3 times.
✗ Branch 1 not taken.
✗ Branch 2 not taken.
✓ Branch 3 taken 3 times.
|
3 | if (fourcc_tag != HEAD_TAG || header_size < 0) |
235 | ✗ | return AVERROR_INVALIDDATA; | |
236 | |||
237 | /* allocate space for the header and load the whole thing */ | ||
238 | 3 | header = av_malloc(header_size); | |
239 |
1/2✗ Branch 0 not taken.
✓ Branch 1 taken 3 times.
|
3 | if (!header) |
240 | ✗ | return AVERROR(ENOMEM); | |
241 |
1/2✗ Branch 1 not taken.
✓ Branch 2 taken 3 times.
|
3 | if (avio_read(pb, header, header_size) != header_size) { |
242 | ✗ | av_free(header); | |
243 | ✗ | return AVERROR(EIO); | |
244 | } | ||
245 | |||
246 | /* take the lazy approach and search for any and all vtrk and strk chunks */ | ||
247 |
2/2✓ Branch 0 taken 893 times.
✓ Branch 1 taken 3 times.
|
896 | for (i = 0; i < header_size - 8; i++) { |
248 | 893 | fourcc_tag = AV_RL32(&header[i]); | |
249 | 893 | size = AV_RL32(&header[i + 4]); | |
250 |
4/6✓ Branch 0 taken 849 times.
✓ Branch 1 taken 44 times.
✓ Branch 2 taken 849 times.
✗ Branch 3 not taken.
✗ Branch 4 not taken.
✓ Branch 5 taken 849 times.
|
893 | if (size > header_size - i - 8 && (fourcc_tag == vtrk_TAG || fourcc_tag == strk_TAG)) { |
251 | ✗ | av_log(s, AV_LOG_ERROR, "chunk larger than array %d>%d\n", size, header_size - i - 8); | |
252 | ✗ | ret = AVERROR_INVALIDDATA; | |
253 | ✗ | goto fail; | |
254 | } | ||
255 | |||
256 |
2/2✓ Branch 0 taken 3 times.
✓ Branch 1 taken 890 times.
|
893 | if (fourcc_tag == std__TAG) { |
257 |
1/2✗ Branch 0 not taken.
✓ Branch 1 taken 3 times.
|
3 | if (header_size - i < 16) { |
258 | ✗ | av_log(s, AV_LOG_ERROR, "std TAG truncated\n"); | |
259 | ✗ | ret = AVERROR_INVALIDDATA; | |
260 | ✗ | goto fail; | |
261 | } | ||
262 | 3 | fourxm->fps = av_d2q(av_int2float(AV_RL32(&header[i + 12])), 10000); | |
263 |
2/2✓ Branch 0 taken 3 times.
✓ Branch 1 taken 887 times.
|
890 | } else if (fourcc_tag == vtrk_TAG) { |
264 |
1/2✗ Branch 1 not taken.
✓ Branch 2 taken 3 times.
|
3 | if ((ret = parse_vtrk(s, fourxm, header + i, size, |
265 | header_size - i)) < 0) | ||
266 | ✗ | goto fail; | |
267 | |||
268 | 3 | i += 8 + size; | |
269 |
2/2✓ Branch 0 taken 8 times.
✓ Branch 1 taken 879 times.
|
887 | } else if (fourcc_tag == strk_TAG) { |
270 |
1/2✗ Branch 1 not taken.
✓ Branch 2 taken 8 times.
|
8 | if ((ret = parse_strk(s, fourxm, header + i, size, |
271 | header_size - i)) < 0) | ||
272 | ✗ | goto fail; | |
273 | |||
274 | 8 | i += 8 + size; | |
275 | } | ||
276 | } | ||
277 | |||
278 | /* skip over the LIST-MOVI chunk (which is where the stream should be */ | ||
279 |
1/2✗ Branch 2 not taken.
✓ Branch 3 taken 3 times.
|
3 | GET_LIST_HEADER(); |
280 |
1/2✗ Branch 0 not taken.
✓ Branch 1 taken 3 times.
|
3 | if (fourcc_tag != MOVI_TAG) { |
281 | ✗ | ret = AVERROR_INVALIDDATA; | |
282 | ✗ | goto fail; | |
283 | } | ||
284 | |||
285 | 3 | av_free(header); | |
286 | /* initialize context members */ | ||
287 | 3 | fourxm->video_pts = -1; /* first frame will push to 0 */ | |
288 | |||
289 | 3 | return 0; | |
290 | ✗ | fail: | |
291 | ✗ | av_free(header); | |
292 | ✗ | return ret; | |
293 | } | ||
294 | |||
295 | 602 | static int fourxm_read_packet(AVFormatContext *s, | |
296 | AVPacket *pkt) | ||
297 | { | ||
298 | 602 | FourxmDemuxContext *fourxm = s->priv_data; | |
299 | 602 | AVIOContext *pb = s->pb; | |
300 | unsigned int fourcc_tag; | ||
301 | unsigned int size; | ||
302 | 602 | int ret = 0; | |
303 | unsigned int track_number; | ||
304 | 602 | int packet_read = 0; | |
305 | unsigned char header[8]; | ||
306 | int64_t audio_frame_count; | ||
307 | |||
308 |
2/2✓ Branch 0 taken 818 times.
✓ Branch 1 taken 599 times.
|
1417 | while (!packet_read) { |
309 |
2/2✓ Branch 1 taken 3 times.
✓ Branch 2 taken 815 times.
|
818 | if ((ret = avio_read(s->pb, header, 8)) < 0) |
310 | 3 | return ret; | |
311 | 815 | fourcc_tag = AV_RL32(&header[0]); | |
312 | 815 | size = AV_RL32(&header[4]); | |
313 |
1/2✗ Branch 1 not taken.
✓ Branch 2 taken 815 times.
|
815 | if (avio_feof(pb)) |
314 | ✗ | return AVERROR(EIO); | |
315 |
3/4✓ Branch 0 taken 216 times.
✓ Branch 1 taken 251 times.
✓ Branch 2 taken 348 times.
✗ Branch 3 not taken.
|
815 | switch (fourcc_tag) { |
316 | 216 | case LIST_TAG: | |
317 | /* this is a good time to bump the video pts */ | ||
318 | 216 | fourxm->video_pts++; | |
319 | |||
320 | /* skip the LIST-* tag and move on to the next fourcc */ | ||
321 | 216 | avio_rl32(pb); | |
322 | 216 | break; | |
323 | |||
324 | 251 | case ifrm_TAG: | |
325 | case pfrm_TAG: | ||
326 | case cfrm_TAG: | ||
327 | case ifr2_TAG: | ||
328 | case pfr2_TAG: | ||
329 | case cfr2_TAG: | ||
330 | /* allocate 8 more bytes than 'size' to account for fourcc | ||
331 | * and size */ | ||
332 |
1/2✗ Branch 0 not taken.
✓ Branch 1 taken 251 times.
|
251 | if (size > INT_MAX - AV_INPUT_BUFFER_PADDING_SIZE - 8) |
333 | ✗ | return AVERROR_INVALIDDATA; | |
334 |
1/2✗ Branch 0 not taken.
✓ Branch 1 taken 251 times.
|
251 | if (fourxm->video_stream_index < 0) |
335 | ✗ | return AVERROR_INVALIDDATA; | |
336 |
1/2✗ Branch 1 not taken.
✓ Branch 2 taken 251 times.
|
251 | if ((ret = av_new_packet(pkt, size + 8)) < 0) |
337 | ✗ | return ret; | |
338 | 251 | pkt->stream_index = fourxm->video_stream_index; | |
339 | 251 | pkt->pts = fourxm->video_pts; | |
340 | 251 | pkt->pos = avio_tell(s->pb); | |
341 | 251 | memcpy(pkt->data, header, 8); | |
342 | 251 | ret = avio_read(s->pb, &pkt->data[8], size); | |
343 | |||
344 |
1/2✗ Branch 0 not taken.
✓ Branch 1 taken 251 times.
|
251 | if (ret < 0) { |
345 | ✗ | av_packet_unref(pkt); | |
346 | } else { | ||
347 | 251 | packet_read = 1; | |
348 | 251 | av_shrink_packet(pkt, ret + 8); | |
349 | } | ||
350 | 251 | break; | |
351 | |||
352 | 348 | case snd__TAG: | |
353 | 348 | track_number = avio_rl32(pb); | |
354 | 348 | avio_skip(pb, 4); | |
355 | 348 | size -= 8; | |
356 | |||
357 |
1/2✓ Branch 0 taken 348 times.
✗ Branch 1 not taken.
|
348 | if (track_number < fourxm->track_count && |
358 |
1/2✓ Branch 0 taken 348 times.
✗ Branch 1 not taken.
|
348 | fourxm->tracks[track_number].channels > 0) { |
359 | 348 | ret = av_get_packet(s->pb, pkt, size); | |
360 |
1/2✗ Branch 0 not taken.
✓ Branch 1 taken 348 times.
|
348 | if (ret < 0) |
361 | ✗ | return ret; | |
362 | 348 | pkt->stream_index = | |
363 | 348 | fourxm->tracks[track_number].stream_index; | |
364 | 348 | pkt->pts = fourxm->tracks[track_number].audio_pts; | |
365 | 348 | packet_read = 1; | |
366 | |||
367 | /* pts accounting */ | ||
368 | 348 | audio_frame_count = size; | |
369 |
2/2✓ Branch 0 taken 333 times.
✓ Branch 1 taken 15 times.
|
348 | if (fourxm->tracks[track_number].adpcm) |
370 | 333 | audio_frame_count -= 2 * (fourxm->tracks[track_number].channels); | |
371 | 348 | audio_frame_count /= fourxm->tracks[track_number].channels; | |
372 |
2/2✓ Branch 0 taken 333 times.
✓ Branch 1 taken 15 times.
|
348 | if (fourxm->tracks[track_number].adpcm) { |
373 | 333 | audio_frame_count *= 2; | |
374 | } else | ||
375 | 15 | audio_frame_count /= | |
376 | 15 | (fourxm->tracks[track_number].bits / 8); | |
377 | 348 | fourxm->tracks[track_number].audio_pts += audio_frame_count; | |
378 | } else { | ||
379 | ✗ | avio_skip(pb, size); | |
380 | } | ||
381 | 348 | break; | |
382 | |||
383 | ✗ | default: | |
384 | ✗ | avio_skip(pb, size); | |
385 | ✗ | break; | |
386 | } | ||
387 | } | ||
388 | 599 | return ret; | |
389 | } | ||
390 | |||
391 | 3 | static int fourxm_read_close(AVFormatContext *s) | |
392 | { | ||
393 | 3 | FourxmDemuxContext *fourxm = s->priv_data; | |
394 | |||
395 | 3 | av_freep(&fourxm->tracks); | |
396 | |||
397 | 3 | return 0; | |
398 | } | ||
399 | |||
400 | const FFInputFormat ff_fourxm_demuxer = { | ||
401 | .p.name = "4xm", | ||
402 | .p.long_name = NULL_IF_CONFIG_SMALL("4X Technologies"), | ||
403 | .priv_data_size = sizeof(FourxmDemuxContext), | ||
404 | .flags_internal = FF_INFMT_FLAG_INIT_CLEANUP, | ||
405 | .read_probe = fourxm_probe, | ||
406 | .read_header = fourxm_read_header, | ||
407 | .read_packet = fourxm_read_packet, | ||
408 | .read_close = fourxm_read_close, | ||
409 | }; | ||
410 |