avformat: Remove non-compiling and/or silly commented-out printf/av_log statements
[libav.git] / libavformat / ffmdec.c
CommitLineData
de6d9b64 1/*
4d58e4cb 2 * FFM (avserver live feed) demuxer
406792e7 3 * Copyright (c) 2001 Fabrice Bellard
de6d9b64 4 *
2912e87a 5 * This file is part of Libav.
b78e7197 6 *
2912e87a 7 * Libav is free software; you can redistribute it and/or
66d2ff2a
FB
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
b78e7197 10 * version 2.1 of the License, or (at your option) any later version.
de6d9b64 11 *
2912e87a 12 * Libav is distributed in the hope that it will be useful,
de6d9b64 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
66d2ff2a
FB
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
de6d9b64 16 *
66d2ff2a 17 * You should have received a copy of the GNU Lesser General Public
2912e87a 18 * License along with Libav; if not, write to the Free Software
5509bffa 19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
de6d9b64 20 */
85a6b01d 21
6a5d31ac 22#include "libavutil/intreadwrite.h"
3383a53e 23#include "libavutil/intfloat.h"
de6d9b64 24#include "avformat.h"
c3f9ebf7 25#include "internal.h"
85a6b01d 26#include "ffm.h"
4d58e4cb 27#if CONFIG_AVSERVER
8be1c656 28#include <unistd.h>
de6d9b64 29
bc5c918e 30int64_t ffm_read_write_index(int fd)
278f987a
BC
31{
32 uint8_t buf[8];
33
34 lseek(fd, 8, SEEK_SET);
2dc91884
BC
35 if (read(fd, buf, 8) != 8)
36 return AVERROR(EIO);
278f987a
BC
37 return AV_RB64(buf);
38}
39
6fcce4f9 40int ffm_write_write_index(int fd, int64_t pos)
278f987a
BC
41{
42 uint8_t buf[8];
43 int i;
44
45 for(i=0;i<8;i++)
46 buf[i] = (pos >> (56 - i * 8)) & 0xff;
47 lseek(fd, 8, SEEK_SET);
6fcce4f9
PK
48 if (write(fd, buf, 8) != 8)
49 return AVERROR(EIO);
50 return 8;
278f987a
BC
51}
52
bc5c918e 53void ffm_set_write_index(AVFormatContext *s, int64_t pos, int64_t file_size)
278f987a
BC
54{
55 FFMContext *ffm = s->priv_data;
56 ffm->write_index = pos;
57 ffm->file_size = file_size;
58}
4d58e4cb 59#endif // CONFIG_AVSERVER
278f987a 60
de6d9b64
FB
61static int ffm_is_avail_data(AVFormatContext *s, int size)
62{
63 FFMContext *ffm = s->priv_data;
bc5c918e 64 int64_t pos, avail_size;
de6d9b64
FB
65 int len;
66
67 len = ffm->packet_end - ffm->packet_ptr;
ba26712b
BC
68 if (size <= len)
69 return 1;
a2704c97 70 pos = avio_tell(s->pb);
b9edbe99 71 if (!ffm->write_index) {
21c6438f 72 if (pos == ffm->file_size)
b9edbe99
BC
73 return AVERROR_EOF;
74 avail_size = ffm->file_size - pos;
75 } else {
de6d9b64
FB
76 if (pos == ffm->write_index) {
77 /* exactly at the end of stream */
b9edbe99 78 return AVERROR(EAGAIN);
de6d9b64
FB
79 } else if (pos < ffm->write_index) {
80 avail_size = ffm->write_index - pos;
81 } else {
82 avail_size = (ffm->file_size - pos) + (ffm->write_index - FFM_PACKET_SIZE);
83 }
b9edbe99 84 }
de6d9b64
FB
85 avail_size = (avail_size / ffm->packet_size) * (ffm->packet_size - FFM_HEADER_SIZE) + len;
86 if (size <= avail_size)
87 return 1;
88 else
b9edbe99 89 return AVERROR(EAGAIN);
de6d9b64
FB
90}
91
7c45723a
BC
92static int ffm_resync(AVFormatContext *s, int state)
93{
94 av_log(s, AV_LOG_ERROR, "resyncing\n");
95 while (state != PACKET_ID) {
66e5b1df 96 if (s->pb->eof_reached) {
7c45723a
BC
97 av_log(s, AV_LOG_ERROR, "cannot find FFM syncword\n");
98 return -1;
99 }
b7effd4e 100 state = (state << 8) | avio_r8(s->pb);
7c45723a
BC
101 }
102 return 0;
103}
104
de6d9b64 105/* first is true if we read the frame header */
4606ac8d 106static int ffm_read_data(AVFormatContext *s,
b30bb535 107 uint8_t *buf, int size, int header)
de6d9b64
FB
108{
109 FFMContext *ffm = s->priv_data;
ae628ec1 110 AVIOContext *pb = s->pb;
7c45723a 111 int len, fill_size, size1, frame_offset, id;
de6d9b64
FB
112
113 size1 = size;
114 while (size > 0) {
115 redo:
116 len = ffm->packet_end - ffm->packet_ptr;
e5ece183
BC
117 if (len < 0)
118 return -1;
de6d9b64
FB
119 if (len > size)
120 len = size;
121 if (len == 0) {
a2704c97 122 if (avio_tell(pb) == ffm->file_size)
6b4aa5da 123 avio_seek(pb, ffm->packet_size, SEEK_SET);
5e57424d 124 retry_read:
b7effd4e 125 id = avio_rb16(pb); /* PACKET_ID */
7c45723a
BC
126 if (id != PACKET_ID)
127 if (ffm_resync(s, id) < 0)
128 return -1;
b7effd4e
AK
129 fill_size = avio_rb16(pb);
130 ffm->dts = avio_rb64(pb);
131 frame_offset = avio_rb16(pb);
132 avio_read(pb, ffm->packet, ffm->packet_size - FFM_HEADER_SIZE);
de6d9b64 133 ffm->packet_end = ffm->packet + (ffm->packet_size - FFM_HEADER_SIZE - fill_size);
eea2f032 134 if (ffm->packet_end < ffm->packet || frame_offset < 0)
71c32f19 135 return -1;
de6d9b64
FB
136 /* if first packet or resynchronization packet, we must
137 handle it specifically */
138 if (ffm->first_packet || (frame_offset & 0x8000)) {
5e57424d
PG
139 if (!frame_offset) {
140 /* This packet has no frame headers in it */
a2704c97 141 if (avio_tell(pb) >= ffm->packet_size * 3) {
6b4aa5da 142 avio_seek(pb, -ffm->packet_size * 2, SEEK_CUR);
5e57424d
PG
143 goto retry_read;
144 }
145 /* This is bad, we cannot find a valid frame header */
146 return 0;
147 }
de6d9b64 148 ffm->first_packet = 0;
a077f3bc 149 if ((frame_offset & 0x7fff) < FFM_HEADER_SIZE)
71c32f19 150 return -1;
de6d9b64 151 ffm->packet_ptr = ffm->packet + (frame_offset & 0x7fff) - FFM_HEADER_SIZE;
b30bb535 152 if (!header)
de6d9b64
FB
153 break;
154 } else {
155 ffm->packet_ptr = ffm->packet;
156 }
157 goto redo;
158 }
159 memcpy(buf, ffm->packet_ptr, len);
160 buf += len;
161 ffm->packet_ptr += len;
162 size -= len;
b30bb535 163 header = 0;
de6d9b64
FB
164 }
165 return size1 - size;
166}
167
92a0f338
BC
168/* ensure that acutal seeking happens between FFM_PACKET_SIZE
169 and file_size - FFM_PACKET_SIZE */
d7c11b11 170static int64_t ffm_seek1(AVFormatContext *s, int64_t pos1)
a1e01307
BC
171{
172 FFMContext *ffm = s->priv_data;
ae628ec1 173 AVIOContext *pb = s->pb;
bc5c918e 174 int64_t pos;
a1e01307 175
92a0f338
BC
176 pos = FFMIN(pos1, ffm->file_size - FFM_PACKET_SIZE);
177 pos = FFMAX(pos, FFM_PACKET_SIZE);
919d7a34 178 av_dlog(s, "seek to %"PRIx64" -> %"PRIx64"\n", pos1, pos);
d7c11b11 179 return avio_seek(pb, pos, SEEK_SET);
a1e01307
BC
180}
181
bc5c918e 182static int64_t get_dts(AVFormatContext *s, int64_t pos)
979b1a06 183{
ae628ec1 184 AVIOContext *pb = s->pb;
fabb990e 185 int64_t dts;
979b1a06
BC
186
187 ffm_seek1(s, pos);
45a8a02a 188 avio_skip(pb, 4);
b7effd4e 189 dts = avio_rb64(pb);
919d7a34 190 av_dlog(s, "dts=%0.6f\n", dts / 1000000.0);
fabb990e 191 return dts;
979b1a06 192}
de6d9b64 193
91628427
PG
194static void adjust_write_index(AVFormatContext *s)
195{
196 FFMContext *ffm = s->priv_data;
ae628ec1 197 AVIOContext *pb = s->pb;
91628427 198 int64_t pts;
bc5c918e
DB
199 //int64_t orig_write_index = ffm->write_index;
200 int64_t pos_min, pos_max;
91628427 201 int64_t pts_start;
a2704c97 202 int64_t ptr = avio_tell(pb);
91628427
PG
203
204
205 pos_min = 0;
206 pos_max = ffm->file_size - 2 * FFM_PACKET_SIZE;
207
fabb990e 208 pts_start = get_dts(s, pos_min);
91628427 209
fabb990e 210 pts = get_dts(s, pos_max);
91628427 211
115329f1 212 if (pts - 100000 > pts_start)
79292510 213 goto end;
91628427
PG
214
215 ffm->write_index = FFM_PACKET_SIZE;
216
fabb990e 217 pts_start = get_dts(s, pos_min);
91628427 218
fabb990e 219 pts = get_dts(s, pos_max);
91628427
PG
220
221 if (pts - 100000 <= pts_start) {
222 while (1) {
bc5c918e 223 int64_t newpos;
91628427
PG
224 int64_t newpts;
225
226 newpos = ((pos_max + pos_min) / (2 * FFM_PACKET_SIZE)) * FFM_PACKET_SIZE;
227
228 if (newpos == pos_min)
229 break;
230
fabb990e 231 newpts = get_dts(s, newpos);
91628427
PG
232
233 if (newpts - 100000 <= pts) {
234 pos_max = newpos;
235 pts = newpts;
236 } else {
237 pos_min = newpos;
238 }
239 }
240 ffm->write_index += pos_max;
241 }
242
79292510 243 end:
6b4aa5da 244 avio_seek(pb, ptr, SEEK_SET);
91628427
PG
245}
246
247
e36a3906
RD
248static int ffm_close(AVFormatContext *s)
249{
250 int i;
251
252 for (i = 0; i < s->nb_streams; i++)
253 av_freep(&s->streams[i]->codec->rc_eq);
254
255 return 0;
256}
257
527b46ba 258
6e9651d1 259static int ffm_read_header(AVFormatContext *s)
de6d9b64 260{
c9a65ca8 261 FFMContext *ffm = s->priv_data;
de6d9b64 262 AVStream *st;
ae628ec1 263 AVIOContext *pb = s->pb;
de6d9b64 264 AVCodecContext *codec;
fa26a29d 265 int i, nb_streams;
0c1a9eda 266 uint32_t tag;
de6d9b64 267
de6d9b64 268 /* header */
b7effd4e 269 tag = avio_rl32(pb);
de6d9b64
FB
270 if (tag != MKTAG('F', 'F', 'M', '1'))
271 goto fail;
b7effd4e 272 ffm->packet_size = avio_rb32(pb);
de6d9b64
FB
273 if (ffm->packet_size != FFM_PACKET_SIZE)
274 goto fail;
b7effd4e 275 ffm->write_index = avio_rb64(pb);
de6d9b64 276 /* get also filesize */
8978feda 277 if (pb->seekable) {
76aa876e 278 ffm->file_size = avio_size(pb);
b9edbe99
BC
279 if (ffm->write_index)
280 adjust_write_index(s);
de6d9b64 281 } else {
8da9266c 282 ffm->file_size = (UINT64_C(1) << 63) - 1;
de6d9b64
FB
283 }
284
b7effd4e
AK
285 nb_streams = avio_rb32(pb);
286 avio_rb32(pb); /* total bitrate */
de6d9b64 287 /* read each stream */
fa26a29d 288 for(i=0;i<nb_streams;i++) {
75bdb984
PG
289 char rc_eq_buf[128];
290
3b3bbdd3 291 st = avformat_new_stream(s, NULL);
de6d9b64
FB
292 if (!st)
293 goto fail;
115329f1 294
c3f9ebf7 295 avpriv_set_pts_info(st, 64, 1, 1000000);
115329f1 296
01f4895c 297 codec = st->codec;
de6d9b64 298 /* generic info */
b7effd4e
AK
299 codec->codec_id = avio_rb32(pb);
300 codec->codec_type = avio_r8(pb); /* codec_type */
301 codec->bit_rate = avio_rb32(pb);
b7effd4e
AK
302 codec->flags = avio_rb32(pb);
303 codec->flags2 = avio_rb32(pb);
304 codec->debug = avio_rb32(pb);
de6d9b64
FB
305 /* specific info */
306 switch(codec->codec_type) {
72415b2a 307 case AVMEDIA_TYPE_VIDEO:
b7effd4e
AK
308 codec->time_base.num = avio_rb32(pb);
309 codec->time_base.den = avio_rb32(pb);
310 codec->width = avio_rb16(pb);
311 codec->height = avio_rb16(pb);
312 codec->gop_size = avio_rb16(pb);
313 codec->pix_fmt = avio_rb32(pb);
314 codec->qmin = avio_r8(pb);
315 codec->qmax = avio_r8(pb);
316 codec->max_qdiff = avio_r8(pb);
317 codec->qcompress = avio_rb16(pb) / 10000.0;
318 codec->qblur = avio_rb16(pb) / 10000.0;
319 codec->bit_rate_tolerance = avio_rb32(pb);
e16ead07
AK
320 avio_get_str(pb, INT_MAX, rc_eq_buf, sizeof(rc_eq_buf));
321 codec->rc_eq = av_strdup(rc_eq_buf);
b7effd4e
AK
322 codec->rc_max_rate = avio_rb32(pb);
323 codec->rc_min_rate = avio_rb32(pb);
324 codec->rc_buffer_size = avio_rb32(pb);
3383a53e
MR
325 codec->i_quant_factor = av_int2double(avio_rb64(pb));
326 codec->b_quant_factor = av_int2double(avio_rb64(pb));
327 codec->i_quant_offset = av_int2double(avio_rb64(pb));
328 codec->b_quant_offset = av_int2double(avio_rb64(pb));
b7effd4e
AK
329 codec->dct_algo = avio_rb32(pb);
330 codec->strict_std_compliance = avio_rb32(pb);
331 codec->max_b_frames = avio_rb32(pb);
b7effd4e
AK
332 codec->mpeg_quant = avio_rb32(pb);
333 codec->intra_dc_precision = avio_rb32(pb);
334 codec->me_method = avio_rb32(pb);
335 codec->mb_decision = avio_rb32(pb);
336 codec->nsse_weight = avio_rb32(pb);
337 codec->frame_skip_cmp = avio_rb32(pb);
3383a53e 338 codec->rc_buffer_aggressivity = av_int2double(avio_rb64(pb));
b7effd4e
AK
339 codec->codec_tag = avio_rb32(pb);
340 codec->thread_count = avio_r8(pb);
341 codec->coder_type = avio_rb32(pb);
342 codec->me_cmp = avio_rb32(pb);
b7effd4e
AK
343 codec->me_subpel_quality = avio_rb32(pb);
344 codec->me_range = avio_rb32(pb);
345 codec->keyint_min = avio_rb32(pb);
346 codec->scenechange_threshold = avio_rb32(pb);
347 codec->b_frame_strategy = avio_rb32(pb);
3383a53e
MR
348 codec->qcompress = av_int2double(avio_rb64(pb));
349 codec->qblur = av_int2double(avio_rb64(pb));
b7effd4e
AK
350 codec->max_qdiff = avio_rb32(pb);
351 codec->refs = avio_rb32(pb);
de6d9b64 352 break;
72415b2a 353 case AVMEDIA_TYPE_AUDIO:
b7effd4e
AK
354 codec->sample_rate = avio_rb32(pb);
355 codec->channels = avio_rl16(pb);
356 codec->frame_size = avio_rl16(pb);
357 codec->sample_fmt = (int16_t) avio_rl16(pb);
de6d9b64 358 break;
20f01548 359 default:
75bdb984 360 goto fail;
de6d9b64 361 }
7080cbe2 362 if (codec->flags & CODEC_FLAG_GLOBAL_HEADER) {
b7effd4e 363 codec->extradata_size = avio_rb32(pb);
7080cbe2
BC
364 codec->extradata = av_malloc(codec->extradata_size);
365 if (!codec->extradata)
366 return AVERROR(ENOMEM);
b7effd4e 367 avio_read(pb, codec->extradata, codec->extradata_size);
7080cbe2 368 }
de6d9b64
FB
369 }
370
371 /* get until end of block reached */
a2704c97 372 while ((avio_tell(pb) % ffm->packet_size) != 0)
b7effd4e 373 avio_r8(pb);
de6d9b64
FB
374
375 /* init packet demux */
376 ffm->packet_ptr = ffm->packet;
377 ffm->packet_end = ffm->packet;
378 ffm->frame_offset = 0;
fabb990e 379 ffm->dts = 0;
de6d9b64
FB
380 ffm->read_state = READ_HEADER;
381 ffm->first_packet = 1;
382 return 0;
383 fail:
527b46ba 384 ffm_close(s);
de6d9b64
FB
385 return -1;
386}
387
388/* return < 0 if eof */
389static int ffm_read_packet(AVFormatContext *s, AVPacket *pkt)
390{
391 int size;
392 FFMContext *ffm = s->priv_data;
b9edbe99 393 int duration, ret;
eee99eb3 394
de6d9b64
FB
395 switch(ffm->read_state) {
396 case READ_HEADER:
b9edbe99
BC
397 if ((ret = ffm_is_avail_data(s, FRAME_HEADER_SIZE+4)) < 0)
398 return ret;
399
dfd2a005 400 av_dlog(s, "pos=%08"PRIx64" spos=%"PRIx64", write_index=%"PRIx64" size=%"PRIx64"\n",
a2704c97 401 avio_tell(s->pb), s->pb->pos, ffm->write_index, ffm->file_size);
115329f1 402 if (ffm_read_data(s, ffm->header, FRAME_HEADER_SIZE, 1) !=
66d2ff2a 403 FRAME_HEADER_SIZE)
b9edbe99 404 return -1;
3c6a9f66
BC
405 if (ffm->header[1] & FLAG_DTS)
406 if (ffm_read_data(s, ffm->header+16, 4, 1) != 4)
b9edbe99 407 return -1;
de6d9b64
FB
408 ffm->read_state = READ_DATA;
409 /* fall thru */
410 case READ_DATA:
80fb8234 411 size = AV_RB24(ffm->header + 2);
b9edbe99
BC
412 if ((ret = ffm_is_avail_data(s, size)) < 0)
413 return ret;
de6d9b64 414
80fb8234 415 duration = AV_RB24(ffm->header + 5);
20f01548 416
de6d9b64
FB
417 av_new_packet(pkt, size);
418 pkt->stream_index = ffm->header[0];
2ea2340e
BC
419 if ((unsigned)pkt->stream_index >= s->nb_streams) {
420 av_log(s, AV_LOG_ERROR, "invalid stream index %d\n", pkt->stream_index);
421 av_free_packet(pkt);
422 ffm->read_state = READ_HEADER;
b9edbe99 423 return -1;
2ea2340e 424 }
a2704c97 425 pkt->pos = avio_tell(s->pb);
de6d9b64 426 if (ffm->header[1] & FLAG_KEY_FRAME)
cc947f04 427 pkt->flags |= AV_PKT_FLAG_KEY;
4606ac8d 428
de6d9b64
FB
429 ffm->read_state = READ_HEADER;
430 if (ffm_read_data(s, pkt->data, size, 0) != size) {
431 /* bad case: desynchronized packet. we cancel all the packet loading */
432 av_free_packet(pkt);
b9edbe99 433 return -1;
de6d9b64 434 }
3c6a9f66
BC
435 pkt->pts = AV_RB64(ffm->header+8);
436 if (ffm->header[1] & FLAG_DTS)
437 pkt->dts = pkt->pts - AV_RB32(ffm->header+16);
438 else
439 pkt->dts = pkt->pts;
20f01548 440 pkt->duration = duration;
de6d9b64
FB
441 break;
442 }
443 return 0;
444}
445
de6d9b64 446/* seek to a given time in the file. The file read pointer is
aa6b38c2 447 positioned at or before pts. XXX: the following code is quite
de6d9b64 448 approximative */
7b3c1382 449static int ffm_seek(AVFormatContext *s, int stream_index, int64_t wanted_pts, int flags)
de6d9b64
FB
450{
451 FFMContext *ffm = s->priv_data;
bc5c918e 452 int64_t pos_min, pos_max, pos;
0c1a9eda 453 int64_t pts_min, pts_max, pts;
de6d9b64
FB
454 double pos1;
455
919d7a34 456 av_dlog(s, "wanted_pts=%0.6f\n", wanted_pts / 1000000.0);
de6d9b64
FB
457 /* find the position using linear interpolation (better than
458 dichotomy in typical cases) */
92a0f338
BC
459 pos_min = FFM_PACKET_SIZE;
460 pos_max = ffm->file_size - FFM_PACKET_SIZE;
de6d9b64 461 while (pos_min <= pos_max) {
fabb990e
BC
462 pts_min = get_dts(s, pos_min);
463 pts_max = get_dts(s, pos_max);
de6d9b64 464 /* linear interpolation */
4606ac8d 465 pos1 = (double)(pos_max - pos_min) * (double)(wanted_pts - pts_min) /
de6d9b64 466 (double)(pts_max - pts_min);
0c1a9eda 467 pos = (((int64_t)pos1) / FFM_PACKET_SIZE) * FFM_PACKET_SIZE;
de6d9b64
FB
468 if (pos <= pos_min)
469 pos = pos_min;
470 else if (pos >= pos_max)
471 pos = pos_max;
fabb990e 472 pts = get_dts(s, pos);
de6d9b64
FB
473 /* check if we are lucky */
474 if (pts == wanted_pts) {
475 goto found;
476 } else if (pts > wanted_pts) {
477 pos_max = pos - FFM_PACKET_SIZE;
478 } else {
479 pos_min = pos + FFM_PACKET_SIZE;
480 }
481 }
7b3c1382 482 pos = (flags & AVSEEK_FLAG_BACKWARD) ? pos_min : pos_max;
92a0f338 483
de6d9b64 484 found:
d7c11b11
JP
485 if (ffm_seek1(s, pos) < 0)
486 return -1;
c07d64c8
BC
487
488 /* reset read state */
489 ffm->read_state = READ_HEADER;
490 ffm->packet_ptr = ffm->packet;
491 ffm->packet_end = ffm->packet;
492 ffm->first_packet = 1;
493
de6d9b64
FB
494 return 0;
495}
496
07c4ed85
PG
497static int ffm_probe(AVProbeData *p)
498{
87e87886 499 if (
115329f1 500 p->buf[0] == 'F' && p->buf[1] == 'F' && p->buf[2] == 'M' &&
66d2ff2a 501 p->buf[3] == '1')
07c4ed85 502 return AVPROBE_SCORE_MAX + 1;
07c4ed85
PG
503 return 0;
504}
505
c6610a21 506AVInputFormat ff_ffm_demuxer = {
dfc2c4d9 507 .name = "ffm",
6774247a 508 .long_name = NULL_IF_CONFIG_SMALL("FFM (AVserver live feed)"),
dfc2c4d9
AK
509 .priv_data_size = sizeof(FFMContext),
510 .read_probe = ffm_probe,
511 .read_header = ffm_read_header,
512 .read_packet = ffm_read_packet,
513 .read_close = ffm_close,
514 .read_seek = ffm_seek,
c9a65ca8 515};