Add byte reordering for the SIPRO audio codec. See "rmdec.c: add SIPR codec
[libav.git] / libavformat / ffmdec.c
CommitLineData
de6d9b64 1/*
85a6b01d 2 * FFM (ffserver live feed) demuxer
406792e7 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
6a5d31ac 22#include "libavutil/intreadwrite.h"
de6d9b64 23#include "avformat.h"
85a6b01d 24#include "ffm.h"
b250f9c6 25#if CONFIG_FFSERVER
8be1c656 26#include <unistd.h>
de6d9b64 27
bc5c918e 28int64_t ffm_read_write_index(int fd)
278f987a
BC
29{
30 uint8_t buf[8];
31
32 lseek(fd, 8, SEEK_SET);
2dc91884
BC
33 if (read(fd, buf, 8) != 8)
34 return AVERROR(EIO);
278f987a
BC
35 return AV_RB64(buf);
36}
37
6fcce4f9 38int ffm_write_write_index(int fd, int64_t pos)
278f987a
BC
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);
6fcce4f9
PK
46 if (write(fd, buf, 8) != 8)
47 return AVERROR(EIO);
48 return 8;
278f987a
BC
49}
50
bc5c918e 51void ffm_set_write_index(AVFormatContext *s, int64_t pos, int64_t file_size)
278f987a
BC
52{
53 FFMContext *ffm = s->priv_data;
54 ffm->write_index = pos;
55 ffm->file_size = file_size;
56}
57#endif // CONFIG_FFSERVER
58
de6d9b64
FB
59static int ffm_is_avail_data(AVFormatContext *s, int size)
60{
61 FFMContext *ffm = s->priv_data;
bc5c918e 62 int64_t pos, avail_size;
de6d9b64
FB
63 int len;
64
65 len = ffm->packet_end - ffm->packet_ptr;
ba26712b
BC
66 if (size <= len)
67 return 1;
899681cd 68 pos = url_ftell(s->pb);
de6d9b64
FB
69 if (pos == ffm->write_index) {
70 /* exactly at the end of stream */
71 return 0;
72 } else if (pos < ffm->write_index) {
73 avail_size = ffm->write_index - pos;
74 } else {
75 avail_size = (ffm->file_size - pos) + (ffm->write_index - FFM_PACKET_SIZE);
76 }
77 avail_size = (avail_size / ffm->packet_size) * (ffm->packet_size - FFM_HEADER_SIZE) + len;
78 if (size <= avail_size)
79 return 1;
80 else
81 return 0;
82}
83
84/* first is true if we read the frame header */
4606ac8d 85static int ffm_read_data(AVFormatContext *s,
b30bb535 86 uint8_t *buf, int size, int header)
de6d9b64
FB
87{
88 FFMContext *ffm = s->priv_data;
899681cd 89 ByteIOContext *pb = s->pb;
de6d9b64
FB
90 int len, fill_size, size1, frame_offset;
91
92 size1 = size;
93 while (size > 0) {
94 redo:
95 len = ffm->packet_end - ffm->packet_ptr;
e5ece183
BC
96 if (len < 0)
97 return -1;
de6d9b64
FB
98 if (len > size)
99 len = size;
100 if (len == 0) {
101 if (url_ftell(pb) == ffm->file_size)
102 url_fseek(pb, ffm->packet_size, SEEK_SET);
5e57424d 103 retry_read:
de6d9b64
FB
104 get_be16(pb); /* PACKET_ID */
105 fill_size = get_be16(pb);
fabb990e 106 ffm->dts = get_be64(pb);
de6d9b64
FB
107 frame_offset = get_be16(pb);
108 get_buffer(pb, ffm->packet, ffm->packet_size - FFM_HEADER_SIZE);
109 ffm->packet_end = ffm->packet + (ffm->packet_size - FFM_HEADER_SIZE - fill_size);
eea2f032 110 if (ffm->packet_end < ffm->packet || frame_offset < 0)
71c32f19 111 return -1;
de6d9b64
FB
112 /* if first packet or resynchronization packet, we must
113 handle it specifically */
114 if (ffm->first_packet || (frame_offset & 0x8000)) {
5e57424d
PG
115 if (!frame_offset) {
116 /* This packet has no frame headers in it */
117 if (url_ftell(pb) >= ffm->packet_size * 3) {
118 url_fseek(pb, -ffm->packet_size * 2, SEEK_CUR);
119 goto retry_read;
120 }
121 /* This is bad, we cannot find a valid frame header */
122 return 0;
123 }
de6d9b64 124 ffm->first_packet = 0;
a077f3bc 125 if ((frame_offset & 0x7fff) < FFM_HEADER_SIZE)
71c32f19 126 return -1;
de6d9b64 127 ffm->packet_ptr = ffm->packet + (frame_offset & 0x7fff) - FFM_HEADER_SIZE;
b30bb535 128 if (!header)
de6d9b64
FB
129 break;
130 } else {
131 ffm->packet_ptr = ffm->packet;
132 }
133 goto redo;
134 }
135 memcpy(buf, ffm->packet_ptr, len);
136 buf += len;
137 ffm->packet_ptr += len;
138 size -= len;
b30bb535 139 header = 0;
de6d9b64
FB
140 }
141 return size1 - size;
142}
143
4adcbbbe
BC
144//#define DEBUG_SEEK
145
a1e01307
BC
146/* pos is between 0 and file_size - FFM_PACKET_SIZE. It is translated
147 by the write position inside this function */
bc5c918e 148static void ffm_seek1(AVFormatContext *s, int64_t pos1)
a1e01307
BC
149{
150 FFMContext *ffm = s->priv_data;
151 ByteIOContext *pb = s->pb;
bc5c918e 152 int64_t pos;
a1e01307
BC
153
154 pos = pos1 + ffm->write_index;
155 if (pos >= ffm->file_size)
156 pos -= (ffm->file_size - FFM_PACKET_SIZE);
157#ifdef DEBUG_SEEK
8999c833 158 av_log(s, AV_LOG_DEBUG, "seek to %"PRIx64" -> %"PRIx64"\n", pos1, pos);
a1e01307
BC
159#endif
160 url_fseek(pb, pos, SEEK_SET);
161}
162
bc5c918e 163static int64_t get_dts(AVFormatContext *s, int64_t pos)
979b1a06
BC
164{
165 ByteIOContext *pb = s->pb;
fabb990e 166 int64_t dts;
979b1a06
BC
167
168 ffm_seek1(s, pos);
169 url_fskip(pb, 4);
fabb990e 170 dts = get_be64(pb);
979b1a06 171#ifdef DEBUG_SEEK
8999c833 172 av_log(s, AV_LOG_DEBUG, "pts=%0.6f\n", pts / 1000000.0);
979b1a06 173#endif
fabb990e 174 return dts;
979b1a06 175}
de6d9b64 176
91628427
PG
177static void adjust_write_index(AVFormatContext *s)
178{
179 FFMContext *ffm = s->priv_data;
899681cd 180 ByteIOContext *pb = s->pb;
91628427 181 int64_t pts;
bc5c918e
DB
182 //int64_t orig_write_index = ffm->write_index;
183 int64_t pos_min, pos_max;
91628427 184 int64_t pts_start;
bc5c918e 185 int64_t ptr = url_ftell(pb);
91628427
PG
186
187
188 pos_min = 0;
189 pos_max = ffm->file_size - 2 * FFM_PACKET_SIZE;
190
fabb990e 191 pts_start = get_dts(s, pos_min);
91628427 192
fabb990e 193 pts = get_dts(s, pos_max);
91628427 194
115329f1 195 if (pts - 100000 > pts_start)
79292510 196 goto end;
91628427
PG
197
198 ffm->write_index = FFM_PACKET_SIZE;
199
fabb990e 200 pts_start = get_dts(s, pos_min);
91628427 201
fabb990e 202 pts = get_dts(s, pos_max);
91628427
PG
203
204 if (pts - 100000 <= pts_start) {
205 while (1) {
bc5c918e 206 int64_t newpos;
91628427
PG
207 int64_t newpts;
208
209 newpos = ((pos_max + pos_min) / (2 * FFM_PACKET_SIZE)) * FFM_PACKET_SIZE;
210
211 if (newpos == pos_min)
212 break;
213
fabb990e 214 newpts = get_dts(s, newpos);
91628427
PG
215
216 if (newpts - 100000 <= pts) {
217 pos_max = newpos;
218 pts = newpts;
219 } else {
220 pos_min = newpos;
221 }
222 }
223 ffm->write_index += pos_max;
224 }
225
949b1a13 226 //printf("Adjusted write index from %"PRId64" to %"PRId64": pts=%0.6f\n", orig_write_index, ffm->write_index, pts / 1000000.);
fabb990e 227 //printf("pts range %0.6f - %0.6f\n", get_dts(s, 0) / 1000000. , get_dts(s, ffm->file_size - 2 * FFM_PACKET_SIZE) / 1000000. );
91628427 228
79292510 229 end:
91628427
PG
230 url_fseek(pb, ptr, SEEK_SET);
231}
232
233
de6d9b64
FB
234static int ffm_read_header(AVFormatContext *s, AVFormatParameters *ap)
235{
c9a65ca8 236 FFMContext *ffm = s->priv_data;
de6d9b64 237 AVStream *st;
899681cd 238 ByteIOContext *pb = s->pb;
de6d9b64 239 AVCodecContext *codec;
fa26a29d 240 int i, nb_streams;
0c1a9eda 241 uint32_t tag;
de6d9b64 242
de6d9b64
FB
243 /* header */
244 tag = get_le32(pb);
245 if (tag != MKTAG('F', 'F', 'M', '1'))
246 goto fail;
247 ffm->packet_size = get_be32(pb);
248 if (ffm->packet_size != FFM_PACKET_SIZE)
249 goto fail;
250 ffm->write_index = get_be64(pb);
251 /* get also filesize */
252 if (!url_is_streamed(pb)) {
a965c478 253 ffm->file_size = url_fsize(pb);
91628427 254 adjust_write_index(s);
de6d9b64 255 } else {
8da9266c 256 ffm->file_size = (UINT64_C(1) << 63) - 1;
de6d9b64
FB
257 }
258
fa26a29d 259 nb_streams = get_be32(pb);
de6d9b64
FB
260 get_be32(pb); /* total bitrate */
261 /* read each stream */
fa26a29d 262 for(i=0;i<nb_streams;i++) {
75bdb984
PG
263 char rc_eq_buf[128];
264
fa26a29d 265 st = av_new_stream(s, 0);
de6d9b64
FB
266 if (!st)
267 goto fail;
26aa0f89 268 s->streams[i] = st;
115329f1 269
e928649b 270 av_set_pts_info(st, 64, 1, 1000000);
115329f1 271
01f4895c 272 codec = st->codec;
de6d9b64 273 /* generic info */
26aa0f89
AB
274 codec->codec_id = get_be32(pb);
275 codec->codec_type = get_byte(pb); /* codec_type */
de6d9b64 276 codec->bit_rate = get_be32(pb);
26aa0f89 277 st->quality = get_be32(pb);
ccac2e27 278 codec->flags = get_be32(pb);
22332126
PG
279 codec->flags2 = get_be32(pb);
280 codec->debug = get_be32(pb);
de6d9b64
FB
281 /* specific info */
282 switch(codec->codec_type) {
283 case CODEC_TYPE_VIDEO:
c0df9d75
MN
284 codec->time_base.num = get_be32(pb);
285 codec->time_base.den = get_be32(pb);
de6d9b64
FB
286 codec->width = get_be16(pb);
287 codec->height = get_be16(pb);
20f01548 288 codec->gop_size = get_be16(pb);
22332126 289 codec->pix_fmt = get_be32(pb);
20f01548
PG
290 codec->qmin = get_byte(pb);
291 codec->qmax = get_byte(pb);
292 codec->max_qdiff = get_byte(pb);
293 codec->qcompress = get_be16(pb) / 10000.0;
294 codec->qblur = get_be16(pb) / 10000.0;
3884a3c3 295 codec->bit_rate_tolerance = get_be32(pb);
e9a9e0c2 296 codec->rc_eq = av_strdup(get_strz(pb, rc_eq_buf, sizeof(rc_eq_buf)));
75bdb984
PG
297 codec->rc_max_rate = get_be32(pb);
298 codec->rc_min_rate = get_be32(pb);
299 codec->rc_buffer_size = get_be32(pb);
7cb8f314
MN
300 codec->i_quant_factor = av_int2dbl(get_be64(pb));
301 codec->b_quant_factor = av_int2dbl(get_be64(pb));
302 codec->i_quant_offset = av_int2dbl(get_be64(pb));
303 codec->b_quant_offset = av_int2dbl(get_be64(pb));
75bdb984 304 codec->dct_algo = get_be32(pb);
22332126
PG
305 codec->strict_std_compliance = get_be32(pb);
306 codec->max_b_frames = get_be32(pb);
307 codec->luma_elim_threshold = get_be32(pb);
308 codec->chroma_elim_threshold = get_be32(pb);
309 codec->mpeg_quant = get_be32(pb);
310 codec->intra_dc_precision = get_be32(pb);
311 codec->me_method = get_be32(pb);
312 codec->mb_decision = get_be32(pb);
313 codec->nsse_weight = get_be32(pb);
314 codec->frame_skip_cmp = get_be32(pb);
7cb8f314 315 codec->rc_buffer_aggressivity = av_int2dbl(get_be64(pb));
038a1243 316 codec->codec_tag = get_be32(pb);
dbedf2aa 317 codec->thread_count = get_byte(pb);
de6d9b64
FB
318 break;
319 case CODEC_TYPE_AUDIO:
320 codec->sample_rate = get_be32(pb);
321 codec->channels = get_le16(pb);
20f01548 322 codec->frame_size = get_le16(pb);
de6d9b64 323 break;
20f01548 324 default:
75bdb984 325 goto fail;
de6d9b64 326 }
7080cbe2
BC
327 if (codec->flags & CODEC_FLAG_GLOBAL_HEADER) {
328 codec->extradata_size = get_be32(pb);
329 codec->extradata = av_malloc(codec->extradata_size);
330 if (!codec->extradata)
331 return AVERROR(ENOMEM);
332 get_buffer(pb, codec->extradata, codec->extradata_size);
333 }
de6d9b64
FB
334 }
335
336 /* get until end of block reached */
337 while ((url_ftell(pb) % ffm->packet_size) != 0)
338 get_byte(pb);
339
340 /* init packet demux */
341 ffm->packet_ptr = ffm->packet;
342 ffm->packet_end = ffm->packet;
343 ffm->frame_offset = 0;
fabb990e 344 ffm->dts = 0;
de6d9b64
FB
345 ffm->read_state = READ_HEADER;
346 ffm->first_packet = 1;
347 return 0;
348 fail:
349 for(i=0;i<s->nb_streams;i++) {
350 st = s->streams[i];
351 if (st) {
1ea4f593 352 av_free(st);
de6d9b64
FB
353 }
354 }
de6d9b64
FB
355 return -1;
356}
357
358/* return < 0 if eof */
359static int ffm_read_packet(AVFormatContext *s, AVPacket *pkt)
360{
361 int size;
362 FFMContext *ffm = s->priv_data;
20f01548 363 int duration;
de6d9b64 364
eee99eb3
BC
365 if (url_fsize(s->pb) == FFM_PACKET_SIZE)
366 return -1;
367
de6d9b64
FB
368 switch(ffm->read_state) {
369 case READ_HEADER:
3c6a9f66 370 if (!ffm_is_avail_data(s, FRAME_HEADER_SIZE+4)) {
8fa36ae0 371 return AVERROR(EAGAIN);
66d2ff2a 372 }
ff978de4 373 dprintf(s, "pos=%08"PRIx64" spos=%"PRIx64", write_index=%"PRIx64" size=%"PRIx64"\n",
e785efc4 374 url_ftell(s->pb), s->pb->pos, ffm->write_index, ffm->file_size);
115329f1 375 if (ffm_read_data(s, ffm->header, FRAME_HEADER_SIZE, 1) !=
66d2ff2a 376 FRAME_HEADER_SIZE)
8fa36ae0 377 return AVERROR(EAGAIN);
3c6a9f66
BC
378 if (ffm->header[1] & FLAG_DTS)
379 if (ffm_read_data(s, ffm->header+16, 4, 1) != 4)
380 return AVERROR(EAGAIN);
de6d9b64 381#if 0
a299832f 382 av_hexdump_log(s, AV_LOG_DEBUG, ffm->header, FRAME_HEADER_SIZE);
de6d9b64
FB
383#endif
384 ffm->read_state = READ_DATA;
385 /* fall thru */
386 case READ_DATA:
80fb8234 387 size = AV_RB24(ffm->header + 2);
de6d9b64 388 if (!ffm_is_avail_data(s, size)) {
8fa36ae0 389 return AVERROR(EAGAIN);
de6d9b64
FB
390 }
391
80fb8234 392 duration = AV_RB24(ffm->header + 5);
20f01548 393
de6d9b64
FB
394 av_new_packet(pkt, size);
395 pkt->stream_index = ffm->header[0];
2ea2340e
BC
396 if ((unsigned)pkt->stream_index >= s->nb_streams) {
397 av_log(s, AV_LOG_ERROR, "invalid stream index %d\n", pkt->stream_index);
398 av_free_packet(pkt);
399 ffm->read_state = READ_HEADER;
400 return AVERROR(EAGAIN);
401 }
899681cd 402 pkt->pos = url_ftell(s->pb);
de6d9b64
FB
403 if (ffm->header[1] & FLAG_KEY_FRAME)
404 pkt->flags |= PKT_FLAG_KEY;
4606ac8d 405
de6d9b64
FB
406 ffm->read_state = READ_HEADER;
407 if (ffm_read_data(s, pkt->data, size, 0) != size) {
408 /* bad case: desynchronized packet. we cancel all the packet loading */
409 av_free_packet(pkt);
8fa36ae0 410 return AVERROR(EAGAIN);
de6d9b64 411 }
3c6a9f66
BC
412 pkt->pts = AV_RB64(ffm->header+8);
413 if (ffm->header[1] & FLAG_DTS)
414 pkt->dts = pkt->pts - AV_RB32(ffm->header+16);
415 else
416 pkt->dts = pkt->pts;
20f01548 417 pkt->duration = duration;
de6d9b64
FB
418 break;
419 }
420 return 0;
421}
422
de6d9b64 423/* seek to a given time in the file. The file read pointer is
aa6b38c2 424 positioned at or before pts. XXX: the following code is quite
de6d9b64 425 approximative */
7b3c1382 426static int ffm_seek(AVFormatContext *s, int stream_index, int64_t wanted_pts, int flags)
de6d9b64
FB
427{
428 FFMContext *ffm = s->priv_data;
bc5c918e 429 int64_t pos_min, pos_max, pos;
0c1a9eda 430 int64_t pts_min, pts_max, pts;
de6d9b64
FB
431 double pos1;
432
433#ifdef DEBUG_SEEK
8999c833 434 av_log(s, AV_LOG_DEBUG, "wanted_pts=%0.6f\n", wanted_pts / 1000000.0);
de6d9b64
FB
435#endif
436 /* find the position using linear interpolation (better than
437 dichotomy in typical cases) */
438 pos_min = 0;
439 pos_max = ffm->file_size - 2 * FFM_PACKET_SIZE;
440 while (pos_min <= pos_max) {
fabb990e
BC
441 pts_min = get_dts(s, pos_min);
442 pts_max = get_dts(s, pos_max);
de6d9b64 443 /* linear interpolation */
4606ac8d 444 pos1 = (double)(pos_max - pos_min) * (double)(wanted_pts - pts_min) /
de6d9b64 445 (double)(pts_max - pts_min);
0c1a9eda 446 pos = (((int64_t)pos1) / FFM_PACKET_SIZE) * FFM_PACKET_SIZE;
de6d9b64
FB
447 if (pos <= pos_min)
448 pos = pos_min;
449 else if (pos >= pos_max)
450 pos = pos_max;
fabb990e 451 pts = get_dts(s, pos);
de6d9b64
FB
452 /* check if we are lucky */
453 if (pts == wanted_pts) {
454 goto found;
455 } else if (pts > wanted_pts) {
456 pos_max = pos - FFM_PACKET_SIZE;
457 } else {
458 pos_min = pos + FFM_PACKET_SIZE;
459 }
460 }
7b3c1382 461 pos = (flags & AVSEEK_FLAG_BACKWARD) ? pos_min : pos_max;
de6d9b64
FB
462 if (pos > 0)
463 pos -= FFM_PACKET_SIZE;
464 found:
465 ffm_seek1(s, pos);
c07d64c8
BC
466
467 /* reset read state */
468 ffm->read_state = READ_HEADER;
469 ffm->packet_ptr = ffm->packet;
470 ffm->packet_end = ffm->packet;
471 ffm->first_packet = 1;
472
de6d9b64
FB
473 return 0;
474}
475
07c4ed85
PG
476static int ffm_probe(AVProbeData *p)
477{
87e87886 478 if (
115329f1 479 p->buf[0] == 'F' && p->buf[1] == 'F' && p->buf[2] == 'M' &&
66d2ff2a 480 p->buf[3] == '1')
07c4ed85 481 return AVPROBE_SCORE_MAX + 1;
07c4ed85
PG
482 return 0;
483}
484
ff70e601 485AVInputFormat ffm_demuxer = {
c9a65ca8 486 "ffm",
af274fd1 487 NULL_IF_CONFIG_SMALL("FFM (FFserver live feed) format"),
66d2ff2a 488 sizeof(FFMContext),
07c4ed85 489 ffm_probe,
c9a65ca8
FB
490 ffm_read_header,
491 ffm_read_packet,
9f5d3b13 492 NULL,
c9a65ca8 493 ffm_seek,
c9a65ca8 494};