ffmpeg / libavformat / ffmdec.c @ 66e5b1df
History | View | Annotate | Download (16.1 KB)
1 |
/*
|
---|---|
2 |
* FFM (ffserver live feed) demuxer
|
3 |
* Copyright (c) 2001 Fabrice Bellard
|
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 |
#include "avformat.h" |
24 |
#include "ffm.h" |
25 |
#if CONFIG_FFSERVER
|
26 |
#include <unistd.h> |
27 |
|
28 |
int64_t ffm_read_write_index(int fd)
|
29 |
{ |
30 |
uint8_t buf[8];
|
31 |
|
32 |
lseek(fd, 8, SEEK_SET);
|
33 |
if (read(fd, buf, 8) != 8) |
34 |
return AVERROR(EIO);
|
35 |
return AV_RB64(buf);
|
36 |
} |
37 |
|
38 |
int ffm_write_write_index(int fd, int64_t pos) |
39 |
{ |
40 |
uint8_t buf[8];
|
41 |
int i;
|
42 |
|
43 |
for(i=0;i<8;i++) |
44 |
buf[i] = (pos >> (56 - i * 8)) & 0xff; |
45 |
lseek(fd, 8, SEEK_SET);
|
46 |
if (write(fd, buf, 8) != 8) |
47 |
return AVERROR(EIO);
|
48 |
return 8; |
49 |
} |
50 |
|
51 |
void ffm_set_write_index(AVFormatContext *s, int64_t pos, int64_t file_size)
|
52 |
{ |
53 |
FFMContext *ffm = s->priv_data; |
54 |
ffm->write_index = pos; |
55 |
ffm->file_size = file_size; |
56 |
} |
57 |
#endif // CONFIG_FFSERVER |
58 |
|
59 |
static int ffm_is_avail_data(AVFormatContext *s, int size) |
60 |
{ |
61 |
FFMContext *ffm = s->priv_data; |
62 |
int64_t pos, avail_size; |
63 |
int len;
|
64 |
|
65 |
len = ffm->packet_end - ffm->packet_ptr; |
66 |
if (size <= len)
|
67 |
return 1; |
68 |
pos = avio_tell(s->pb); |
69 |
if (!ffm->write_index) {
|
70 |
if (pos == ffm->file_size)
|
71 |
return AVERROR_EOF;
|
72 |
avail_size = ffm->file_size - pos; |
73 |
} else {
|
74 |
if (pos == ffm->write_index) {
|
75 |
/* exactly at the end of stream */
|
76 |
return AVERROR(EAGAIN);
|
77 |
} else if (pos < ffm->write_index) { |
78 |
avail_size = ffm->write_index - pos; |
79 |
} else {
|
80 |
avail_size = (ffm->file_size - pos) + (ffm->write_index - FFM_PACKET_SIZE); |
81 |
} |
82 |
} |
83 |
avail_size = (avail_size / ffm->packet_size) * (ffm->packet_size - FFM_HEADER_SIZE) + len; |
84 |
if (size <= avail_size)
|
85 |
return 1; |
86 |
else
|
87 |
return AVERROR(EAGAIN);
|
88 |
} |
89 |
|
90 |
static int ffm_resync(AVFormatContext *s, int state) |
91 |
{ |
92 |
av_log(s, AV_LOG_ERROR, "resyncing\n");
|
93 |
while (state != PACKET_ID) {
|
94 |
if (s->pb->eof_reached) {
|
95 |
av_log(s, AV_LOG_ERROR, "cannot find FFM syncword\n");
|
96 |
return -1; |
97 |
} |
98 |
state = (state << 8) | avio_r8(s->pb);
|
99 |
} |
100 |
return 0; |
101 |
} |
102 |
|
103 |
/* first is true if we read the frame header */
|
104 |
static int ffm_read_data(AVFormatContext *s, |
105 |
uint8_t *buf, int size, int header) |
106 |
{ |
107 |
FFMContext *ffm = s->priv_data; |
108 |
AVIOContext *pb = s->pb; |
109 |
int len, fill_size, size1, frame_offset, id;
|
110 |
|
111 |
size1 = size; |
112 |
while (size > 0) { |
113 |
redo:
|
114 |
len = ffm->packet_end - ffm->packet_ptr; |
115 |
if (len < 0) |
116 |
return -1; |
117 |
if (len > size)
|
118 |
len = size; |
119 |
if (len == 0) { |
120 |
if (avio_tell(pb) == ffm->file_size)
|
121 |
avio_seek(pb, ffm->packet_size, SEEK_SET); |
122 |
retry_read:
|
123 |
id = avio_rb16(pb); /* PACKET_ID */
|
124 |
if (id != PACKET_ID)
|
125 |
if (ffm_resync(s, id) < 0) |
126 |
return -1; |
127 |
fill_size = avio_rb16(pb); |
128 |
ffm->dts = avio_rb64(pb); |
129 |
frame_offset = avio_rb16(pb); |
130 |
avio_read(pb, ffm->packet, ffm->packet_size - FFM_HEADER_SIZE); |
131 |
ffm->packet_end = ffm->packet + (ffm->packet_size - FFM_HEADER_SIZE - fill_size); |
132 |
if (ffm->packet_end < ffm->packet || frame_offset < 0) |
133 |
return -1; |
134 |
/* if first packet or resynchronization packet, we must
|
135 |
handle it specifically */
|
136 |
if (ffm->first_packet || (frame_offset & 0x8000)) { |
137 |
if (!frame_offset) {
|
138 |
/* This packet has no frame headers in it */
|
139 |
if (avio_tell(pb) >= ffm->packet_size * 3) { |
140 |
avio_seek(pb, -ffm->packet_size * 2, SEEK_CUR);
|
141 |
goto retry_read;
|
142 |
} |
143 |
/* This is bad, we cannot find a valid frame header */
|
144 |
return 0; |
145 |
} |
146 |
ffm->first_packet = 0;
|
147 |
if ((frame_offset & 0x7fff) < FFM_HEADER_SIZE) |
148 |
return -1; |
149 |
ffm->packet_ptr = ffm->packet + (frame_offset & 0x7fff) - FFM_HEADER_SIZE;
|
150 |
if (!header)
|
151 |
break;
|
152 |
} else {
|
153 |
ffm->packet_ptr = ffm->packet; |
154 |
} |
155 |
goto redo;
|
156 |
} |
157 |
memcpy(buf, ffm->packet_ptr, len); |
158 |
buf += len; |
159 |
ffm->packet_ptr += len; |
160 |
size -= len; |
161 |
header = 0;
|
162 |
} |
163 |
return size1 - size;
|
164 |
} |
165 |
|
166 |
//#define DEBUG_SEEK
|
167 |
|
168 |
/* ensure that acutal seeking happens between FFM_PACKET_SIZE
|
169 |
and file_size - FFM_PACKET_SIZE */
|
170 |
static void ffm_seek1(AVFormatContext *s, int64_t pos1) |
171 |
{ |
172 |
FFMContext *ffm = s->priv_data; |
173 |
AVIOContext *pb = s->pb; |
174 |
int64_t pos; |
175 |
|
176 |
pos = FFMIN(pos1, ffm->file_size - FFM_PACKET_SIZE); |
177 |
pos = FFMAX(pos, FFM_PACKET_SIZE); |
178 |
#ifdef DEBUG_SEEK
|
179 |
av_log(s, AV_LOG_DEBUG, "seek to %"PRIx64" -> %"PRIx64"\n", pos1, pos); |
180 |
#endif
|
181 |
avio_seek(pb, pos, SEEK_SET); |
182 |
} |
183 |
|
184 |
static int64_t get_dts(AVFormatContext *s, int64_t pos)
|
185 |
{ |
186 |
AVIOContext *pb = s->pb; |
187 |
int64_t dts; |
188 |
|
189 |
ffm_seek1(s, pos); |
190 |
avio_seek(pb, 4, SEEK_CUR);
|
191 |
dts = avio_rb64(pb); |
192 |
#ifdef DEBUG_SEEK
|
193 |
av_log(s, AV_LOG_DEBUG, "dts=%0.6f\n", dts / 1000000.0); |
194 |
#endif
|
195 |
return dts;
|
196 |
} |
197 |
|
198 |
static void adjust_write_index(AVFormatContext *s) |
199 |
{ |
200 |
FFMContext *ffm = s->priv_data; |
201 |
AVIOContext *pb = s->pb; |
202 |
int64_t pts; |
203 |
//int64_t orig_write_index = ffm->write_index;
|
204 |
int64_t pos_min, pos_max; |
205 |
int64_t pts_start; |
206 |
int64_t ptr = avio_tell(pb); |
207 |
|
208 |
|
209 |
pos_min = 0;
|
210 |
pos_max = ffm->file_size - 2 * FFM_PACKET_SIZE;
|
211 |
|
212 |
pts_start = get_dts(s, pos_min); |
213 |
|
214 |
pts = get_dts(s, pos_max); |
215 |
|
216 |
if (pts - 100000 > pts_start) |
217 |
goto end;
|
218 |
|
219 |
ffm->write_index = FFM_PACKET_SIZE; |
220 |
|
221 |
pts_start = get_dts(s, pos_min); |
222 |
|
223 |
pts = get_dts(s, pos_max); |
224 |
|
225 |
if (pts - 100000 <= pts_start) { |
226 |
while (1) { |
227 |
int64_t newpos; |
228 |
int64_t newpts; |
229 |
|
230 |
newpos = ((pos_max + pos_min) / (2 * FFM_PACKET_SIZE)) * FFM_PACKET_SIZE;
|
231 |
|
232 |
if (newpos == pos_min)
|
233 |
break;
|
234 |
|
235 |
newpts = get_dts(s, newpos); |
236 |
|
237 |
if (newpts - 100000 <= pts) { |
238 |
pos_max = newpos; |
239 |
pts = newpts; |
240 |
} else {
|
241 |
pos_min = newpos; |
242 |
} |
243 |
} |
244 |
ffm->write_index += pos_max; |
245 |
} |
246 |
|
247 |
//printf("Adjusted write index from %"PRId64" to %"PRId64": pts=%0.6f\n", orig_write_index, ffm->write_index, pts / 1000000.);
|
248 |
//printf("pts range %0.6f - %0.6f\n", get_dts(s, 0) / 1000000. , get_dts(s, ffm->file_size - 2 * FFM_PACKET_SIZE) / 1000000. );
|
249 |
|
250 |
end:
|
251 |
avio_seek(pb, ptr, SEEK_SET); |
252 |
} |
253 |
|
254 |
|
255 |
static int ffm_close(AVFormatContext *s) |
256 |
{ |
257 |
int i;
|
258 |
|
259 |
for (i = 0; i < s->nb_streams; i++) |
260 |
av_freep(&s->streams[i]->codec->rc_eq); |
261 |
|
262 |
return 0; |
263 |
} |
264 |
|
265 |
|
266 |
static int ffm_read_header(AVFormatContext *s, AVFormatParameters *ap) |
267 |
{ |
268 |
FFMContext *ffm = s->priv_data; |
269 |
AVStream *st; |
270 |
AVIOContext *pb = s->pb; |
271 |
AVCodecContext *codec; |
272 |
int i, nb_streams;
|
273 |
uint32_t tag; |
274 |
|
275 |
/* header */
|
276 |
tag = avio_rl32(pb); |
277 |
if (tag != MKTAG('F', 'F', 'M', '1')) |
278 |
goto fail;
|
279 |
ffm->packet_size = avio_rb32(pb); |
280 |
if (ffm->packet_size != FFM_PACKET_SIZE)
|
281 |
goto fail;
|
282 |
ffm->write_index = avio_rb64(pb); |
283 |
/* get also filesize */
|
284 |
if (!url_is_streamed(pb)) {
|
285 |
ffm->file_size = avio_size(pb); |
286 |
if (ffm->write_index)
|
287 |
adjust_write_index(s); |
288 |
} else {
|
289 |
ffm->file_size = (UINT64_C(1) << 63) - 1; |
290 |
} |
291 |
|
292 |
nb_streams = avio_rb32(pb); |
293 |
avio_rb32(pb); /* total bitrate */
|
294 |
/* read each stream */
|
295 |
for(i=0;i<nb_streams;i++) { |
296 |
char rc_eq_buf[128]; |
297 |
|
298 |
st = av_new_stream(s, 0);
|
299 |
if (!st)
|
300 |
goto fail;
|
301 |
|
302 |
av_set_pts_info(st, 64, 1, 1000000); |
303 |
|
304 |
codec = st->codec; |
305 |
/* generic info */
|
306 |
codec->codec_id = avio_rb32(pb); |
307 |
codec->codec_type = avio_r8(pb); /* codec_type */
|
308 |
codec->bit_rate = avio_rb32(pb); |
309 |
st->quality = avio_rb32(pb); |
310 |
codec->flags = avio_rb32(pb); |
311 |
codec->flags2 = avio_rb32(pb); |
312 |
codec->debug = avio_rb32(pb); |
313 |
/* specific info */
|
314 |
switch(codec->codec_type) {
|
315 |
case AVMEDIA_TYPE_VIDEO:
|
316 |
codec->time_base.num = avio_rb32(pb); |
317 |
codec->time_base.den = avio_rb32(pb); |
318 |
codec->width = avio_rb16(pb); |
319 |
codec->height = avio_rb16(pb); |
320 |
codec->gop_size = avio_rb16(pb); |
321 |
codec->pix_fmt = avio_rb32(pb); |
322 |
codec->qmin = avio_r8(pb); |
323 |
codec->qmax = avio_r8(pb); |
324 |
codec->max_qdiff = avio_r8(pb); |
325 |
codec->qcompress = avio_rb16(pb) / 10000.0; |
326 |
codec->qblur = avio_rb16(pb) / 10000.0; |
327 |
codec->bit_rate_tolerance = avio_rb32(pb); |
328 |
avio_get_str(pb, INT_MAX, rc_eq_buf, sizeof(rc_eq_buf));
|
329 |
codec->rc_eq = av_strdup(rc_eq_buf); |
330 |
codec->rc_max_rate = avio_rb32(pb); |
331 |
codec->rc_min_rate = avio_rb32(pb); |
332 |
codec->rc_buffer_size = avio_rb32(pb); |
333 |
codec->i_quant_factor = av_int2dbl(avio_rb64(pb)); |
334 |
codec->b_quant_factor = av_int2dbl(avio_rb64(pb)); |
335 |
codec->i_quant_offset = av_int2dbl(avio_rb64(pb)); |
336 |
codec->b_quant_offset = av_int2dbl(avio_rb64(pb)); |
337 |
codec->dct_algo = avio_rb32(pb); |
338 |
codec->strict_std_compliance = avio_rb32(pb); |
339 |
codec->max_b_frames = avio_rb32(pb); |
340 |
codec->luma_elim_threshold = avio_rb32(pb); |
341 |
codec->chroma_elim_threshold = avio_rb32(pb); |
342 |
codec->mpeg_quant = avio_rb32(pb); |
343 |
codec->intra_dc_precision = avio_rb32(pb); |
344 |
codec->me_method = avio_rb32(pb); |
345 |
codec->mb_decision = avio_rb32(pb); |
346 |
codec->nsse_weight = avio_rb32(pb); |
347 |
codec->frame_skip_cmp = avio_rb32(pb); |
348 |
codec->rc_buffer_aggressivity = av_int2dbl(avio_rb64(pb)); |
349 |
codec->codec_tag = avio_rb32(pb); |
350 |
codec->thread_count = avio_r8(pb); |
351 |
codec->coder_type = avio_rb32(pb); |
352 |
codec->me_cmp = avio_rb32(pb); |
353 |
codec->partitions = avio_rb32(pb); |
354 |
codec->me_subpel_quality = avio_rb32(pb); |
355 |
codec->me_range = avio_rb32(pb); |
356 |
codec->keyint_min = avio_rb32(pb); |
357 |
codec->scenechange_threshold = avio_rb32(pb); |
358 |
codec->b_frame_strategy = avio_rb32(pb); |
359 |
codec->qcompress = av_int2dbl(avio_rb64(pb)); |
360 |
codec->qblur = av_int2dbl(avio_rb64(pb)); |
361 |
codec->max_qdiff = avio_rb32(pb); |
362 |
codec->refs = avio_rb32(pb); |
363 |
codec->directpred = avio_rb32(pb); |
364 |
break;
|
365 |
case AVMEDIA_TYPE_AUDIO:
|
366 |
codec->sample_rate = avio_rb32(pb); |
367 |
codec->channels = avio_rl16(pb); |
368 |
codec->frame_size = avio_rl16(pb); |
369 |
codec->sample_fmt = (int16_t) avio_rl16(pb); |
370 |
break;
|
371 |
default:
|
372 |
goto fail;
|
373 |
} |
374 |
if (codec->flags & CODEC_FLAG_GLOBAL_HEADER) {
|
375 |
codec->extradata_size = avio_rb32(pb); |
376 |
codec->extradata = av_malloc(codec->extradata_size); |
377 |
if (!codec->extradata)
|
378 |
return AVERROR(ENOMEM);
|
379 |
avio_read(pb, codec->extradata, codec->extradata_size); |
380 |
} |
381 |
} |
382 |
|
383 |
/* get until end of block reached */
|
384 |
while ((avio_tell(pb) % ffm->packet_size) != 0) |
385 |
avio_r8(pb); |
386 |
|
387 |
/* init packet demux */
|
388 |
ffm->packet_ptr = ffm->packet; |
389 |
ffm->packet_end = ffm->packet; |
390 |
ffm->frame_offset = 0;
|
391 |
ffm->dts = 0;
|
392 |
ffm->read_state = READ_HEADER; |
393 |
ffm->first_packet = 1;
|
394 |
return 0; |
395 |
fail:
|
396 |
ffm_close(s); |
397 |
return -1; |
398 |
} |
399 |
|
400 |
/* return < 0 if eof */
|
401 |
static int ffm_read_packet(AVFormatContext *s, AVPacket *pkt) |
402 |
{ |
403 |
int size;
|
404 |
FFMContext *ffm = s->priv_data; |
405 |
int duration, ret;
|
406 |
|
407 |
switch(ffm->read_state) {
|
408 |
case READ_HEADER:
|
409 |
if ((ret = ffm_is_avail_data(s, FRAME_HEADER_SIZE+4)) < 0) |
410 |
return ret;
|
411 |
|
412 |
av_dlog(s, "pos=%08"PRIx64" spos=%"PRIx64", write_index=%"PRIx64" size=%"PRIx64"\n", |
413 |
avio_tell(s->pb), s->pb->pos, ffm->write_index, ffm->file_size); |
414 |
if (ffm_read_data(s, ffm->header, FRAME_HEADER_SIZE, 1) != |
415 |
FRAME_HEADER_SIZE) |
416 |
return -1; |
417 |
if (ffm->header[1] & FLAG_DTS) |
418 |
if (ffm_read_data(s, ffm->header+16, 4, 1) != 4) |
419 |
return -1; |
420 |
#if 0
|
421 |
av_hexdump_log(s, AV_LOG_DEBUG, ffm->header, FRAME_HEADER_SIZE);
|
422 |
#endif
|
423 |
ffm->read_state = READ_DATA; |
424 |
/* fall thru */
|
425 |
case READ_DATA:
|
426 |
size = AV_RB24(ffm->header + 2);
|
427 |
if ((ret = ffm_is_avail_data(s, size)) < 0) |
428 |
return ret;
|
429 |
|
430 |
duration = AV_RB24(ffm->header + 5);
|
431 |
|
432 |
av_new_packet(pkt, size); |
433 |
pkt->stream_index = ffm->header[0];
|
434 |
if ((unsigned)pkt->stream_index >= s->nb_streams) { |
435 |
av_log(s, AV_LOG_ERROR, "invalid stream index %d\n", pkt->stream_index);
|
436 |
av_free_packet(pkt); |
437 |
ffm->read_state = READ_HEADER; |
438 |
return -1; |
439 |
} |
440 |
pkt->pos = avio_tell(s->pb); |
441 |
if (ffm->header[1] & FLAG_KEY_FRAME) |
442 |
pkt->flags |= AV_PKT_FLAG_KEY; |
443 |
|
444 |
ffm->read_state = READ_HEADER; |
445 |
if (ffm_read_data(s, pkt->data, size, 0) != size) { |
446 |
/* bad case: desynchronized packet. we cancel all the packet loading */
|
447 |
av_free_packet(pkt); |
448 |
return -1; |
449 |
} |
450 |
pkt->pts = AV_RB64(ffm->header+8);
|
451 |
if (ffm->header[1] & FLAG_DTS) |
452 |
pkt->dts = pkt->pts - AV_RB32(ffm->header+16);
|
453 |
else
|
454 |
pkt->dts = pkt->pts; |
455 |
pkt->duration = duration; |
456 |
break;
|
457 |
} |
458 |
return 0; |
459 |
} |
460 |
|
461 |
/* seek to a given time in the file. The file read pointer is
|
462 |
positioned at or before pts. XXX: the following code is quite
|
463 |
approximative */
|
464 |
static int ffm_seek(AVFormatContext *s, int stream_index, int64_t wanted_pts, int flags) |
465 |
{ |
466 |
FFMContext *ffm = s->priv_data; |
467 |
int64_t pos_min, pos_max, pos; |
468 |
int64_t pts_min, pts_max, pts; |
469 |
double pos1;
|
470 |
|
471 |
#ifdef DEBUG_SEEK
|
472 |
av_log(s, AV_LOG_DEBUG, "wanted_pts=%0.6f\n", wanted_pts / 1000000.0); |
473 |
#endif
|
474 |
/* find the position using linear interpolation (better than
|
475 |
dichotomy in typical cases) */
|
476 |
pos_min = FFM_PACKET_SIZE; |
477 |
pos_max = ffm->file_size - FFM_PACKET_SIZE; |
478 |
while (pos_min <= pos_max) {
|
479 |
pts_min = get_dts(s, pos_min); |
480 |
pts_max = get_dts(s, pos_max); |
481 |
/* linear interpolation */
|
482 |
pos1 = (double)(pos_max - pos_min) * (double)(wanted_pts - pts_min) / |
483 |
(double)(pts_max - pts_min);
|
484 |
pos = (((int64_t)pos1) / FFM_PACKET_SIZE) * FFM_PACKET_SIZE; |
485 |
if (pos <= pos_min)
|
486 |
pos = pos_min; |
487 |
else if (pos >= pos_max) |
488 |
pos = pos_max; |
489 |
pts = get_dts(s, pos); |
490 |
/* check if we are lucky */
|
491 |
if (pts == wanted_pts) {
|
492 |
goto found;
|
493 |
} else if (pts > wanted_pts) { |
494 |
pos_max = pos - FFM_PACKET_SIZE; |
495 |
} else {
|
496 |
pos_min = pos + FFM_PACKET_SIZE; |
497 |
} |
498 |
} |
499 |
pos = (flags & AVSEEK_FLAG_BACKWARD) ? pos_min : pos_max; |
500 |
|
501 |
found:
|
502 |
ffm_seek1(s, pos); |
503 |
|
504 |
/* reset read state */
|
505 |
ffm->read_state = READ_HEADER; |
506 |
ffm->packet_ptr = ffm->packet; |
507 |
ffm->packet_end = ffm->packet; |
508 |
ffm->first_packet = 1;
|
509 |
|
510 |
return 0; |
511 |
} |
512 |
|
513 |
static int ffm_probe(AVProbeData *p) |
514 |
{ |
515 |
if (
|
516 |
p->buf[0] == 'F' && p->buf[1] == 'F' && p->buf[2] == 'M' && |
517 |
p->buf[3] == '1') |
518 |
return AVPROBE_SCORE_MAX + 1; |
519 |
return 0; |
520 |
} |
521 |
|
522 |
AVInputFormat ff_ffm_demuxer = { |
523 |
"ffm",
|
524 |
NULL_IF_CONFIG_SMALL("FFM (FFserver live feed) format"),
|
525 |
sizeof(FFMContext),
|
526 |
ffm_probe, |
527 |
ffm_read_header, |
528 |
ffm_read_packet, |
529 |
ffm_close, |
530 |
ffm_seek, |
531 |
}; |