remove unneeded ffmpeg commandline switches, and enable quiet mode
[libav.git] / libavformat / ffmdec.c
CommitLineData
de6d9b64 1/*
85a6b01d 2 * FFM (ffserver live feed) demuxer
66d2ff2a 3 * Copyright (c) 2001 Fabrice Bellard.
de6d9b64 4 *
b78e7197
DB
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg 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 *
b78e7197 12 * FFmpeg 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
b78e7197 18 * License along with FFmpeg; 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
de6d9b64 22#include "avformat.h"
85a6b01d 23#include "ffm.h"
278f987a 24#ifdef CONFIG_FFSERVER
8be1c656 25#include <unistd.h>
de6d9b64 26
278f987a
BC
27offset_t ffm_read_write_index(int fd)
28{
29 uint8_t buf[8];
30
31 lseek(fd, 8, SEEK_SET);
32 read(fd, buf, 8);
33 return AV_RB64(buf);
34}
35
36void ffm_write_write_index(int fd, offset_t pos)
37{
38 uint8_t buf[8];
39 int i;
40
41 for(i=0;i<8;i++)
42 buf[i] = (pos >> (56 - i * 8)) & 0xff;
43 lseek(fd, 8, SEEK_SET);
44 write(fd, buf, 8);
45}
46
47void ffm_set_write_index(AVFormatContext *s, offset_t pos, offset_t file_size)
48{
49 FFMContext *ffm = s->priv_data;
50 ffm->write_index = pos;
51 ffm->file_size = file_size;
52}
53#endif // CONFIG_FFSERVER
54
de6d9b64
FB
55static int ffm_is_avail_data(AVFormatContext *s, int size)
56{
57 FFMContext *ffm = s->priv_data;
58 offset_t pos, avail_size;
59 int len;
60
61 len = ffm->packet_end - ffm->packet_ptr;
ba26712b
BC
62 if (size <= len)
63 return 1;
899681cd 64 pos = url_ftell(s->pb);
de6d9b64
FB
65 if (pos == ffm->write_index) {
66 /* exactly at the end of stream */
67 return 0;
68 } else if (pos < ffm->write_index) {
69 avail_size = ffm->write_index - pos;
70 } else {
71 avail_size = (ffm->file_size - pos) + (ffm->write_index - FFM_PACKET_SIZE);
72 }
73 avail_size = (avail_size / ffm->packet_size) * (ffm->packet_size - FFM_HEADER_SIZE) + len;
74 if (size <= avail_size)
75 return 1;
76 else
77 return 0;
78}
79
80/* first is true if we read the frame header */
4606ac8d 81static int ffm_read_data(AVFormatContext *s,
b30bb535 82 uint8_t *buf, int size, int header)
de6d9b64
FB
83{
84 FFMContext *ffm = s->priv_data;
899681cd 85 ByteIOContext *pb = s->pb;
de6d9b64
FB
86 int len, fill_size, size1, frame_offset;
87
88 size1 = size;
89 while (size > 0) {
90 redo:
91 len = ffm->packet_end - ffm->packet_ptr;
e5ece183
BC
92 if (len < 0)
93 return -1;
de6d9b64
FB
94 if (len > size)
95 len = size;
96 if (len == 0) {
97 if (url_ftell(pb) == ffm->file_size)
98 url_fseek(pb, ffm->packet_size, SEEK_SET);
5e57424d 99 retry_read:
de6d9b64
FB
100 get_be16(pb); /* PACKET_ID */
101 fill_size = get_be16(pb);
102 ffm->pts = get_be64(pb);
d271481f 103 ffm->first_frame_in_packet = 1;
de6d9b64
FB
104 frame_offset = get_be16(pb);
105 get_buffer(pb, ffm->packet, ffm->packet_size - FFM_HEADER_SIZE);
106 ffm->packet_end = ffm->packet + (ffm->packet_size - FFM_HEADER_SIZE - fill_size);
eea2f032 107 if (ffm->packet_end < ffm->packet || frame_offset < 0)
71c32f19 108 return -1;
de6d9b64
FB
109 /* if first packet or resynchronization packet, we must
110 handle it specifically */
111 if (ffm->first_packet || (frame_offset & 0x8000)) {
5e57424d
PG
112 if (!frame_offset) {
113 /* This packet has no frame headers in it */
114 if (url_ftell(pb) >= ffm->packet_size * 3) {
115 url_fseek(pb, -ffm->packet_size * 2, SEEK_CUR);
116 goto retry_read;
117 }
118 /* This is bad, we cannot find a valid frame header */
119 return 0;
120 }
de6d9b64 121 ffm->first_packet = 0;
a077f3bc 122 if ((frame_offset & 0x7fff) < FFM_HEADER_SIZE)
71c32f19 123 return -1;
de6d9b64 124 ffm->packet_ptr = ffm->packet + (frame_offset & 0x7fff) - FFM_HEADER_SIZE;
b30bb535 125 if (!header)
de6d9b64
FB
126 break;
127 } else {
128 ffm->packet_ptr = ffm->packet;
129 }
130 goto redo;
131 }
132 memcpy(buf, ffm->packet_ptr, len);
133 buf += len;
134 ffm->packet_ptr += len;
135 size -= len;
b30bb535 136 header = 0;
de6d9b64
FB
137 }
138 return size1 - size;
139}
140
4adcbbbe
BC
141//#define DEBUG_SEEK
142
a1e01307
BC
143/* pos is between 0 and file_size - FFM_PACKET_SIZE. It is translated
144 by the write position inside this function */
145static void ffm_seek1(AVFormatContext *s, offset_t pos1)
146{
147 FFMContext *ffm = s->priv_data;
148 ByteIOContext *pb = s->pb;
149 offset_t pos;
150
151 pos = pos1 + ffm->write_index;
152 if (pos >= ffm->file_size)
153 pos -= (ffm->file_size - FFM_PACKET_SIZE);
154#ifdef DEBUG_SEEK
8999c833 155 av_log(s, AV_LOG_DEBUG, "seek to %"PRIx64" -> %"PRIx64"\n", pos1, pos);
a1e01307
BC
156#endif
157 url_fseek(pb, pos, SEEK_SET);
158}
159
979b1a06
BC
160static int64_t get_pts(AVFormatContext *s, offset_t pos)
161{
162 ByteIOContext *pb = s->pb;
163 int64_t pts;
164
165 ffm_seek1(s, pos);
166 url_fskip(pb, 4);
167 pts = get_be64(pb);
168#ifdef DEBUG_SEEK
8999c833 169 av_log(s, AV_LOG_DEBUG, "pts=%0.6f\n", pts / 1000000.0);
979b1a06
BC
170#endif
171 return pts;
172}
de6d9b64 173
91628427
PG
174static void adjust_write_index(AVFormatContext *s)
175{
176 FFMContext *ffm = s->priv_data;
899681cd 177 ByteIOContext *pb = s->pb;
91628427
PG
178 int64_t pts;
179 //offset_t orig_write_index = ffm->write_index;
180 offset_t pos_min, pos_max;
181 int64_t pts_start;
182 offset_t ptr = url_ftell(pb);
183
184
185 pos_min = 0;
186 pos_max = ffm->file_size - 2 * FFM_PACKET_SIZE;
187
188 pts_start = get_pts(s, pos_min);
189
190 pts = get_pts(s, pos_max);
191
115329f1 192 if (pts - 100000 > pts_start)
79292510 193 goto end;
91628427
PG
194
195 ffm->write_index = FFM_PACKET_SIZE;
196
197 pts_start = get_pts(s, pos_min);
198
199 pts = get_pts(s, pos_max);
200
201 if (pts - 100000 <= pts_start) {
202 while (1) {
203 offset_t newpos;
204 int64_t newpts;
205
206 newpos = ((pos_max + pos_min) / (2 * FFM_PACKET_SIZE)) * FFM_PACKET_SIZE;
207
208 if (newpos == pos_min)
209 break;
210
211 newpts = get_pts(s, newpos);
212
213 if (newpts - 100000 <= pts) {
214 pos_max = newpos;
215 pts = newpts;
216 } else {
217 pos_min = newpos;
218 }
219 }
220 ffm->write_index += pos_max;
221 }
222
949b1a13 223 //printf("Adjusted write index from %"PRId64" to %"PRId64": pts=%0.6f\n", orig_write_index, ffm->write_index, pts / 1000000.);
91628427
PG
224 //printf("pts range %0.6f - %0.6f\n", get_pts(s, 0) / 1000000. , get_pts(s, ffm->file_size - 2 * FFM_PACKET_SIZE) / 1000000. );
225
79292510 226 end:
91628427
PG
227 url_fseek(pb, ptr, SEEK_SET);
228}
229
230
de6d9b64
FB
231static int ffm_read_header(AVFormatContext *s, AVFormatParameters *ap)
232{
c9a65ca8 233 FFMContext *ffm = s->priv_data;
de6d9b64 234 AVStream *st;
899681cd 235 ByteIOContext *pb = s->pb;
de6d9b64 236 AVCodecContext *codec;
fa26a29d 237 int i, nb_streams;
0c1a9eda 238 uint32_t tag;
de6d9b64 239
de6d9b64
FB
240 /* header */
241 tag = get_le32(pb);
242 if (tag != MKTAG('F', 'F', 'M', '1'))
243 goto fail;
244 ffm->packet_size = get_be32(pb);
245 if (ffm->packet_size != FFM_PACKET_SIZE)
246 goto fail;
247 ffm->write_index = get_be64(pb);
248 /* get also filesize */
249 if (!url_is_streamed(pb)) {
a965c478 250 ffm->file_size = url_fsize(pb);
91628427 251 adjust_write_index(s);
de6d9b64 252 } else {
8da9266c 253 ffm->file_size = (UINT64_C(1) << 63) - 1;
de6d9b64
FB
254 }
255
fa26a29d 256 nb_streams = get_be32(pb);
de6d9b64
FB
257 get_be32(pb); /* total bitrate */
258 /* read each stream */
fa26a29d 259 for(i=0;i<nb_streams;i++) {
75bdb984
PG
260 char rc_eq_buf[128];
261
fa26a29d 262 st = av_new_stream(s, 0);
de6d9b64
FB
263 if (!st)
264 goto fail;
26aa0f89 265 s->streams[i] = st;
115329f1 266
e928649b 267 av_set_pts_info(st, 64, 1, 1000000);
115329f1 268
01f4895c 269 codec = st->codec;
de6d9b64 270 /* generic info */
26aa0f89
AB
271 codec->codec_id = get_be32(pb);
272 codec->codec_type = get_byte(pb); /* codec_type */
de6d9b64 273 codec->bit_rate = get_be32(pb);
26aa0f89 274 st->quality = get_be32(pb);
ccac2e27 275 codec->flags = get_be32(pb);
22332126
PG
276 codec->flags2 = get_be32(pb);
277 codec->debug = get_be32(pb);
de6d9b64
FB
278 /* specific info */
279 switch(codec->codec_type) {
280 case CODEC_TYPE_VIDEO:
c0df9d75
MN
281 codec->time_base.num = get_be32(pb);
282 codec->time_base.den = get_be32(pb);
de6d9b64
FB
283 codec->width = get_be16(pb);
284 codec->height = get_be16(pb);
20f01548 285 codec->gop_size = get_be16(pb);
22332126 286 codec->pix_fmt = get_be32(pb);
20f01548
PG
287 codec->qmin = get_byte(pb);
288 codec->qmax = get_byte(pb);
289 codec->max_qdiff = get_byte(pb);
290 codec->qcompress = get_be16(pb) / 10000.0;
291 codec->qblur = get_be16(pb) / 10000.0;
3884a3c3 292 codec->bit_rate_tolerance = get_be32(pb);
e9a9e0c2 293 codec->rc_eq = av_strdup(get_strz(pb, rc_eq_buf, sizeof(rc_eq_buf)));
75bdb984
PG
294 codec->rc_max_rate = get_be32(pb);
295 codec->rc_min_rate = get_be32(pb);
296 codec->rc_buffer_size = get_be32(pb);
7cb8f314
MN
297 codec->i_quant_factor = av_int2dbl(get_be64(pb));
298 codec->b_quant_factor = av_int2dbl(get_be64(pb));
299 codec->i_quant_offset = av_int2dbl(get_be64(pb));
300 codec->b_quant_offset = av_int2dbl(get_be64(pb));
75bdb984 301 codec->dct_algo = get_be32(pb);
22332126
PG
302 codec->strict_std_compliance = get_be32(pb);
303 codec->max_b_frames = get_be32(pb);
304 codec->luma_elim_threshold = get_be32(pb);
305 codec->chroma_elim_threshold = get_be32(pb);
306 codec->mpeg_quant = get_be32(pb);
307 codec->intra_dc_precision = get_be32(pb);
308 codec->me_method = get_be32(pb);
309 codec->mb_decision = get_be32(pb);
310 codec->nsse_weight = get_be32(pb);
311 codec->frame_skip_cmp = get_be32(pb);
7cb8f314 312 codec->rc_buffer_aggressivity = av_int2dbl(get_be64(pb));
038a1243 313 codec->codec_tag = get_be32(pb);
de6d9b64
FB
314 break;
315 case CODEC_TYPE_AUDIO:
316 codec->sample_rate = get_be32(pb);
317 codec->channels = get_le16(pb);
20f01548 318 codec->frame_size = get_le16(pb);
de6d9b64 319 break;
20f01548 320 default:
75bdb984 321 goto fail;
de6d9b64
FB
322 }
323
324 }
325
326 /* get until end of block reached */
327 while ((url_ftell(pb) % ffm->packet_size) != 0)
328 get_byte(pb);
329
330 /* init packet demux */
331 ffm->packet_ptr = ffm->packet;
332 ffm->packet_end = ffm->packet;
333 ffm->frame_offset = 0;
334 ffm->pts = 0;
335 ffm->read_state = READ_HEADER;
336 ffm->first_packet = 1;
337 return 0;
338 fail:
339 for(i=0;i<s->nb_streams;i++) {
340 st = s->streams[i];
341 if (st) {
789bee12 342 av_freep(&st->priv_data);
1ea4f593 343 av_free(st);
de6d9b64
FB
344 }
345 }
de6d9b64
FB
346 return -1;
347}
348
349/* return < 0 if eof */
350static int ffm_read_packet(AVFormatContext *s, AVPacket *pkt)
351{
352 int size;
353 FFMContext *ffm = s->priv_data;
20f01548 354 int duration;
de6d9b64
FB
355
356 switch(ffm->read_state) {
357 case READ_HEADER:
66d2ff2a 358 if (!ffm_is_avail_data(s, FRAME_HEADER_SIZE)) {
8fa36ae0 359 return AVERROR(EAGAIN);
66d2ff2a 360 }
ff978de4 361 dprintf(s, "pos=%08"PRIx64" spos=%"PRIx64", write_index=%"PRIx64" size=%"PRIx64"\n",
899681cd 362 url_ftell(s->pb), s->pb.pos, ffm->write_index, ffm->file_size);
115329f1 363 if (ffm_read_data(s, ffm->header, FRAME_HEADER_SIZE, 1) !=
66d2ff2a 364 FRAME_HEADER_SIZE)
8fa36ae0 365 return AVERROR(EAGAIN);
de6d9b64 366#if 0
a299832f 367 av_hexdump_log(s, AV_LOG_DEBUG, ffm->header, FRAME_HEADER_SIZE);
de6d9b64
FB
368#endif
369 ffm->read_state = READ_DATA;
370 /* fall thru */
371 case READ_DATA:
80fb8234 372 size = AV_RB24(ffm->header + 2);
de6d9b64 373 if (!ffm_is_avail_data(s, size)) {
8fa36ae0 374 return AVERROR(EAGAIN);
de6d9b64
FB
375 }
376
80fb8234 377 duration = AV_RB24(ffm->header + 5);
20f01548 378
de6d9b64
FB
379 av_new_packet(pkt, size);
380 pkt->stream_index = ffm->header[0];
2ea2340e
BC
381 if ((unsigned)pkt->stream_index >= s->nb_streams) {
382 av_log(s, AV_LOG_ERROR, "invalid stream index %d\n", pkt->stream_index);
383 av_free_packet(pkt);
384 ffm->read_state = READ_HEADER;
385 return AVERROR(EAGAIN);
386 }
899681cd 387 pkt->pos = url_ftell(s->pb);
de6d9b64
FB
388 if (ffm->header[1] & FLAG_KEY_FRAME)
389 pkt->flags |= PKT_FLAG_KEY;
4606ac8d 390
de6d9b64
FB
391 ffm->read_state = READ_HEADER;
392 if (ffm_read_data(s, pkt->data, size, 0) != size) {
393 /* bad case: desynchronized packet. we cancel all the packet loading */
394 av_free_packet(pkt);
8fa36ae0 395 return AVERROR(EAGAIN);
de6d9b64 396 }
d271481f
MN
397 if (ffm->first_frame_in_packet)
398 {
399 pkt->pts = ffm->pts;
400 ffm->first_frame_in_packet = 0;
401 }
20f01548 402 pkt->duration = duration;
de6d9b64
FB
403 break;
404 }
405 return 0;
406}
407
de6d9b64 408/* seek to a given time in the file. The file read pointer is
aa6b38c2 409 positioned at or before pts. XXX: the following code is quite
de6d9b64 410 approximative */
7b3c1382 411static int ffm_seek(AVFormatContext *s, int stream_index, int64_t wanted_pts, int flags)
de6d9b64
FB
412{
413 FFMContext *ffm = s->priv_data;
414 offset_t pos_min, pos_max, pos;
0c1a9eda 415 int64_t pts_min, pts_max, pts;
de6d9b64
FB
416 double pos1;
417
418#ifdef DEBUG_SEEK
8999c833 419 av_log(s, AV_LOG_DEBUG, "wanted_pts=%0.6f\n", wanted_pts / 1000000.0);
de6d9b64
FB
420#endif
421 /* find the position using linear interpolation (better than
422 dichotomy in typical cases) */
423 pos_min = 0;
424 pos_max = ffm->file_size - 2 * FFM_PACKET_SIZE;
425 while (pos_min <= pos_max) {
426 pts_min = get_pts(s, pos_min);
427 pts_max = get_pts(s, pos_max);
428 /* linear interpolation */
4606ac8d 429 pos1 = (double)(pos_max - pos_min) * (double)(wanted_pts - pts_min) /
de6d9b64 430 (double)(pts_max - pts_min);
0c1a9eda 431 pos = (((int64_t)pos1) / FFM_PACKET_SIZE) * FFM_PACKET_SIZE;
de6d9b64
FB
432 if (pos <= pos_min)
433 pos = pos_min;
434 else if (pos >= pos_max)
435 pos = pos_max;
436 pts = get_pts(s, pos);
437 /* check if we are lucky */
438 if (pts == wanted_pts) {
439 goto found;
440 } else if (pts > wanted_pts) {
441 pos_max = pos - FFM_PACKET_SIZE;
442 } else {
443 pos_min = pos + FFM_PACKET_SIZE;
444 }
445 }
7b3c1382 446 pos = (flags & AVSEEK_FLAG_BACKWARD) ? pos_min : pos_max;
de6d9b64
FB
447 if (pos > 0)
448 pos -= FFM_PACKET_SIZE;
449 found:
450 ffm_seek1(s, pos);
c07d64c8
BC
451
452 /* reset read state */
453 ffm->read_state = READ_HEADER;
454 ffm->packet_ptr = ffm->packet;
455 ffm->packet_end = ffm->packet;
456 ffm->first_packet = 1;
457
de6d9b64
FB
458 return 0;
459}
460
de6d9b64
FB
461static int ffm_read_close(AVFormatContext *s)
462{
463 AVStream *st;
464 int i;
465
466 for(i=0;i<s->nb_streams;i++) {
467 st = s->streams[i];
789bee12 468 av_freep(&st->priv_data);
de6d9b64 469 }
de6d9b64
FB
470 return 0;
471}
472
07c4ed85
PG
473static int ffm_probe(AVProbeData *p)
474{
87e87886 475 if (
115329f1 476 p->buf[0] == 'F' && p->buf[1] == 'F' && p->buf[2] == 'M' &&
66d2ff2a 477 p->buf[3] == '1')
07c4ed85 478 return AVPROBE_SCORE_MAX + 1;
07c4ed85
PG
479 return 0;
480}
481
ff70e601 482AVInputFormat ffm_demuxer = {
c9a65ca8 483 "ffm",
bde15e74 484 NULL_IF_CONFIG_SMALL("ffm format"),
66d2ff2a 485 sizeof(FFMContext),
07c4ed85 486 ffm_probe,
c9a65ca8
FB
487 ffm_read_header,
488 ffm_read_packet,
489 ffm_read_close,
490 ffm_seek,
c9a65ca8 491};