VC1: merge idct8x8, coeff adjustments and put_pixels.
[libav.git] / libavformat / flvdec.c
CommitLineData
d4f5d74a 1/*
7fbde343 2 * FLV demuxer
406792e7 3 * Copyright (c) 2003 The FFmpeg Project
d4f5d74a 4 *
7b94177e
DB
5 * This demuxer will generate a 1 byte extradata for VP6F content.
6 * It is composed of:
7 * - upper 4bits: difference between encoded width and visible width
8 * - lower 4bits: difference between encoded height and visible height
9 *
b78e7197
DB
10 * This file is part of FFmpeg.
11 *
12 * FFmpeg is free software; you can redistribute it and/or
d4f5d74a
GM
13 * modify it under the terms of the GNU Lesser General Public
14 * License as published by the Free Software Foundation; either
b78e7197 15 * version 2.1 of the License, or (at your option) any later version.
d4f5d74a 16 *
b78e7197 17 * FFmpeg is distributed in the hope that it will be useful,
d4f5d74a
GM
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
20 * Lesser General Public License for more details.
21 *
22 * You should have received a copy of the GNU Lesser General Public
b78e7197 23 * License along with FFmpeg; if not, write to the Free Software
5509bffa 24 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
d4f5d74a 25 */
d2718187 26
df2bd71a 27#include "libavutil/avstring.h"
c1c206b3 28#include "libavcodec/bytestream.h"
d2718187 29#include "libavcodec/mpeg4audio.h"
d4f5d74a 30#include "avformat.h"
6cac3a3b 31#include "flv.h"
d4f5d74a 32
ebd61055
BC
33typedef struct {
34 int wrong_dts; ///< wrong dts due to negative cts
35} FLVContext;
36
d4f5d74a
GM
37static int flv_probe(AVProbeData *p)
38{
39 const uint8_t *d;
40
d4f5d74a 41 d = p->buf;
37e34df5 42 if (d[0] == 'F' && d[1] == 'L' && d[2] == 'V' && d[3] < 5 && d[5]==0 && AV_RB32(d+5)>8) {
74248229 43 return AVPROBE_SCORE_MAX;
d4f5d74a
GM
44 }
45 return 0;
46}
47
428cc588
AH
48static void flv_set_audio_codec(AVFormatContext *s, AVStream *astream, int flv_codecid) {
49 AVCodecContext *acodec = astream->codec;
50 switch(flv_codecid) {
51 //no distinction between S16 and S8 PCM codec flags
44de39f9 52 case FLV_CODECID_PCM:
8e9efe43 53 acodec->codec_id = acodec->bits_per_coded_sample == 8 ? CODEC_ID_PCM_U8 :
63613fe6 54#if HAVE_BIGENDIAN
58293e57
MN
55 CODEC_ID_PCM_S16BE;
56#else
57 CODEC_ID_PCM_S16LE;
58#endif
59 break;
428cc588 60 case FLV_CODECID_PCM_LE:
8e9efe43 61 acodec->codec_id = acodec->bits_per_coded_sample == 8 ? CODEC_ID_PCM_U8 : CODEC_ID_PCM_S16LE; break;
04fd3e81 62 case FLV_CODECID_AAC : acodec->codec_id = CODEC_ID_AAC; break;
428cc588 63 case FLV_CODECID_ADPCM: acodec->codec_id = CODEC_ID_ADPCM_SWF; break;
f96d0eef
BC
64 case FLV_CODECID_SPEEX:
65 acodec->codec_id = CODEC_ID_SPEEX;
66 acodec->sample_rate = 16000;
67 break;
57004ff1 68 case FLV_CODECID_MP3 : acodec->codec_id = CODEC_ID_MP3 ; astream->need_parsing = AVSTREAM_PARSE_FULL; break;
88cb61bb 69 case FLV_CODECID_NELLYMOSER_8KHZ_MONO:
428cc588 70 acodec->sample_rate = 8000; //in case metadata does not otherwise declare samplerate
caa7ad5d
TF
71 acodec->codec_id = CODEC_ID_NELLYMOSER;
72 break;
73 case FLV_CODECID_NELLYMOSER_16KHZ_MONO:
74 acodec->sample_rate = 16000;
75 acodec->codec_id = CODEC_ID_NELLYMOSER;
76 break;
428cc588 77 case FLV_CODECID_NELLYMOSER:
636b13c5
BL
78 acodec->codec_id = CODEC_ID_NELLYMOSER;
79 break;
428cc588
AH
80 default:
81 av_log(s, AV_LOG_INFO, "Unsupported audio codec (%x)\n", flv_codecid >> FLV_AUDIO_CODECID_OFFSET);
82 acodec->codec_tag = flv_codecid >> FLV_AUDIO_CODECID_OFFSET;
83 }
84}
85
86static int flv_set_video_codec(AVFormatContext *s, AVStream *vstream, int flv_codecid) {
87 AVCodecContext *vcodec = vstream->codec;
88 switch(flv_codecid) {
89 case FLV_CODECID_H263 : vcodec->codec_id = CODEC_ID_FLV1 ; break;
90 case FLV_CODECID_SCREEN: vcodec->codec_id = CODEC_ID_FLASHSV; break;
0aa6a518 91 case FLV_CODECID_SCREEN2: vcodec->codec_id = CODEC_ID_FLASHSV2; break;
428cc588 92 case FLV_CODECID_VP6 : vcodec->codec_id = CODEC_ID_VP6F ;
99904603
AJ
93 case FLV_CODECID_VP6A :
94 if(flv_codecid == FLV_CODECID_VP6A)
95 vcodec->codec_id = CODEC_ID_VP6A;
428cc588
AH
96 if(vcodec->extradata_size != 1) {
97 vcodec->extradata_size = 1;
98 vcodec->extradata = av_malloc(1);
99 }
899681cd 100 vcodec->extradata[0] = get_byte(s->pb);
428cc588 101 return 1; // 1 byte body size adjustment for flv_read_packet()
04fd3e81
BC
102 case FLV_CODECID_H264:
103 vcodec->codec_id = CODEC_ID_H264;
104 return 3; // not 4, reading packet type will consume one byte
428cc588
AH
105 default:
106 av_log(s, AV_LOG_INFO, "Unsupported video codec (%x)\n", flv_codecid);
107 vcodec->codec_tag = flv_codecid;
108 }
109
110 return 0;
111}
112
ae628ec1 113static int amf_get_string(AVIOContext *ioc, char *buffer, int buffsize) {
cc38e063
MN
114 int length = get_be16(ioc);
115 if(length >= buffsize) {
116 url_fskip(ioc, length);
117 return -1;
118 }
896bcd2e 119
cc38e063 120 get_buffer(ioc, buffer, length);
896bcd2e 121
cc38e063 122 buffer[length] = '\0';
896bcd2e 123
cc38e063 124 return length;
896bcd2e
MN
125}
126
4fe8a452 127static int amf_parse_object(AVFormatContext *s, AVStream *astream, AVStream *vstream, const char *key, int64_t max_pos, int depth) {
428cc588 128 AVCodecContext *acodec, *vcodec;
ae628ec1 129 AVIOContext *ioc;
428cc588 130 AMFDataType amf_type;
cc38e063 131 char str_val[256];
428cc588
AH
132 double num_val;
133
134 num_val = 0;
899681cd 135 ioc = s->pb;
428cc588
AH
136
137 amf_type = get_byte(ioc);
138
139 switch(amf_type) {
140 case AMF_DATA_TYPE_NUMBER:
141 num_val = av_int2dbl(get_be64(ioc)); break;
142 case AMF_DATA_TYPE_BOOL:
143 num_val = get_byte(ioc); break;
144 case AMF_DATA_TYPE_STRING:
cc38e063 145 if(amf_get_string(ioc, str_val, sizeof(str_val)) < 0)
428cc588
AH
146 return -1;
147 break;
148 case AMF_DATA_TYPE_OBJECT: {
149 unsigned int keylen;
150
151 while(url_ftell(ioc) < max_pos - 2 && (keylen = get_be16(ioc))) {
152 url_fskip(ioc, keylen); //skip key string
153 if(amf_parse_object(s, NULL, NULL, NULL, max_pos, depth + 1) < 0)
154 return -1; //if we couldn't skip, bomb out.
155 }
156 if(get_byte(ioc) != AMF_END_OF_OBJECT)
157 return -1;
158 }
159 break;
160 case AMF_DATA_TYPE_NULL:
161 case AMF_DATA_TYPE_UNDEFINED:
162 case AMF_DATA_TYPE_UNSUPPORTED:
163 break; //these take up no additional space
164 case AMF_DATA_TYPE_MIXEDARRAY:
165 url_fskip(ioc, 4); //skip 32-bit max array index
cc38e063 166 while(url_ftell(ioc) < max_pos - 2 && amf_get_string(ioc, str_val, sizeof(str_val)) > 0) {
428cc588 167 //this is the only case in which we would want a nested parse to not skip over the object
cc38e063 168 if(amf_parse_object(s, astream, vstream, str_val, max_pos, depth + 1) < 0)
428cc588
AH
169 return -1;
170 }
171 if(get_byte(ioc) != AMF_END_OF_OBJECT)
172 return -1;
173 break;
174 case AMF_DATA_TYPE_ARRAY: {
175 unsigned int arraylen, i;
176
177 arraylen = get_be32(ioc);
178 for(i = 0; i < arraylen && url_ftell(ioc) < max_pos - 1; i++) {
179 if(amf_parse_object(s, NULL, NULL, NULL, max_pos, depth + 1) < 0)
180 return -1; //if we couldn't skip, bomb out.
181 }
182 }
183 break;
184 case AMF_DATA_TYPE_DATE:
185 url_fskip(ioc, 8 + 2); //timestamp (double) and UTC offset (int16)
186 break;
187 default: //unsupported type, we couldn't skip
188 return -1;
189 }
190
191 if(depth == 1 && key) { //only look for metadata values when we are not nested and key != NULL
192 acodec = astream ? astream->codec : NULL;
193 vcodec = vstream ? vstream->codec : NULL;
194
195 if(amf_type == AMF_DATA_TYPE_BOOL) {
cc38e063 196 av_strlcpy(str_val, num_val > 0 ? "true" : "false", sizeof(str_val));
2ef6c124 197 av_metadata_set2(&s->metadata, key, str_val, 0);
428cc588 198 } else if(amf_type == AMF_DATA_TYPE_NUMBER) {
cc38e063 199 snprintf(str_val, sizeof(str_val), "%.f", num_val);
2ef6c124 200 av_metadata_set2(&s->metadata, key, str_val, 0);
428cc588 201 if(!strcmp(key, "duration")) s->duration = num_val * AV_TIME_BASE;
9a354fe3
SK
202 else if(!strcmp(key, "videodatarate") && vcodec && 0 <= (int)(num_val * 1024.0))
203 vcodec->bit_rate = num_val * 1024.0;
7e939205
HC
204 else if(!strcmp(key, "audiodatarate") && acodec && 0 <= (int)(num_val * 1024.0))
205 acodec->bit_rate = num_val * 1024.0;
df2bd71a 206 } else if (amf_type == AMF_DATA_TYPE_STRING)
2ef6c124 207 av_metadata_set2(&s->metadata, key, str_val, 0);
428cc588
AH
208 }
209
210 return 0;
211}
212
4fe8a452 213static int flv_read_metabody(AVFormatContext *s, int64_t next_pos) {
428cc588
AH
214 AMFDataType type;
215 AVStream *stream, *astream, *vstream;
ae628ec1 216 AVIOContext *ioc;
4eec2606 217 int i;
cc38e063 218 char buffer[11]; //only needs to hold the string "onMetaData". Anything longer is something we don't want.
428cc588
AH
219
220 astream = NULL;
221 vstream = NULL;
899681cd 222 ioc = s->pb;
428cc588
AH
223
224 //first object needs to be "onMetaData" string
225 type = get_byte(ioc);
cc38e063 226 if(type != AMF_DATA_TYPE_STRING || amf_get_string(ioc, buffer, sizeof(buffer)) < 0 || strcmp(buffer, "onMetaData"))
428cc588
AH
227 return -1;
228
229 //find the streams now so that amf_parse_object doesn't need to do the lookup every time it is called.
230 for(i = 0; i < s->nb_streams; i++) {
231 stream = s->streams[i];
72415b2a
SS
232 if (stream->codec->codec_type == AVMEDIA_TYPE_AUDIO) astream = stream;
233 else if(stream->codec->codec_type == AVMEDIA_TYPE_VIDEO) vstream = stream;
428cc588
AH
234 }
235
236 //parse the second object (we want a mixed array)
cc38e063 237 if(amf_parse_object(s, astream, vstream, buffer, next_pos, 0) < 0)
428cc588
AH
238 return -1;
239
240 return 0;
241}
242
6f910bcf
MN
243static AVStream *create_stream(AVFormatContext *s, int is_audio){
244 AVStream *st = av_new_stream(s, is_audio);
245 if (!st)
246 return NULL;
72415b2a 247 st->codec->codec_type = is_audio ? AVMEDIA_TYPE_AUDIO : AVMEDIA_TYPE_VIDEO;
19719bc6 248 av_set_pts_info(st, 32, 1, 1000); /* 32 bit pts in ms */
6f910bcf
MN
249 return st;
250}
251
d4f5d74a
GM
252static int flv_read_header(AVFormatContext *s,
253 AVFormatParameters *ap)
254{
15f14fc7 255 int offset, flags;
d4f5d74a 256
899681cd
BA
257 url_fskip(s->pb, 4);
258 flags = get_byte(s->pb);
031311cb
AB
259 /* old flvtool cleared this field */
260 /* FIXME: better fix needed */
261 if (!flags) {
262 flags = FLV_HEADER_FLAG_HASVIDEO | FLV_HEADER_FLAG_HASAUDIO;
263 av_log(s, AV_LOG_WARNING, "Broken FLV file, which says no streams present, this might fail\n");
264 }
d4f5d74a 265
b41497e9
MN
266 if((flags & (FLV_HEADER_FLAG_HASVIDEO|FLV_HEADER_FLAG_HASAUDIO))
267 != (FLV_HEADER_FLAG_HASVIDEO|FLV_HEADER_FLAG_HASAUDIO))
268 s->ctx_flags |= AVFMTCTX_NOHEADER;
269
4eb0c665 270 if(flags & FLV_HEADER_FLAG_HASVIDEO){
6f910bcf 271 if(!create_stream(s, 0))
769e10f0 272 return AVERROR(ENOMEM);
4eb0c665
MN
273 }
274 if(flags & FLV_HEADER_FLAG_HASAUDIO){
6f910bcf 275 if(!create_stream(s, 1))
769e10f0 276 return AVERROR(ENOMEM);
4eb0c665
MN
277 }
278
899681cd
BA
279 offset = get_be32(s->pb);
280 url_fseek(s->pb, offset, SEEK_SET);
527c2e64 281 url_fskip(s->pb, 4);
d4f5d74a 282
aeb20f7f
N
283 s->start_time = 0;
284
d4f5d74a
GM
285 return 0;
286}
287
04fd3e81
BC
288static int flv_get_extradata(AVFormatContext *s, AVStream *st, int size)
289{
290 av_free(st->codec->extradata);
291 st->codec->extradata = av_mallocz(size + FF_INPUT_BUFFER_PADDING_SIZE);
292 if (!st->codec->extradata)
293 return AVERROR(ENOMEM);
294 st->codec->extradata_size = size;
295 get_buffer(s->pb, st->codec->extradata, st->codec->extradata_size);
296 return 0;
297}
298
d4f5d74a
GM
299static int flv_read_packet(AVFormatContext *s, AVPacket *pkt)
300{
ebd61055 301 FLVContext *flv = s->priv_data;
4fe8a452
PM
302 int ret, i, type, size, flags, is_audio;
303 int64_t next, pos;
ebd61055 304 int64_t dts, pts = AV_NOPTS_VALUE;
923bd441 305 AVStream *st = NULL;
115329f1 306
527c2e64 307 for(;;url_fskip(s->pb, 4)){ /* pkt size is repeated at end. skip it */
899681cd 308 pos = url_ftell(s->pb);
899681cd
BA
309 type = get_byte(s->pb);
310 size = get_be24(s->pb);
7ef94d22
BC
311 dts = get_be24(s->pb);
312 dts |= get_byte(s->pb) << 24;
313// av_log(s, AV_LOG_DEBUG, "type:%d, size:%d, dts:%d\n", type, size, dts);
899681cd 314 if (url_feof(s->pb))
0e9602ef 315 return AVERROR_EOF;
899681cd 316 url_fskip(s->pb, 3); /* stream id, always 0 */
d4f5d74a 317 flags = 0;
115329f1 318
068f2a22
MN
319 if(size == 0)
320 continue;
115329f1 321
899681cd 322 next= size + url_ftell(s->pb);
dd9f5916 323
6cac3a3b 324 if (type == FLV_TAG_TYPE_AUDIO) {
068f2a22 325 is_audio=1;
899681cd 326 flags = get_byte(s->pb);
6298eb81 327 size--;
6cac3a3b 328 } else if (type == FLV_TAG_TYPE_VIDEO) {
068f2a22 329 is_audio=0;
899681cd 330 flags = get_byte(s->pb);
6298eb81 331 size--;
3d9aecb0
BC
332 if ((flags & 0xf0) == 0x50) /* video info / command frame */
333 goto skip;
d4f5d74a 334 } else {
09e54e1f 335 if (type == FLV_TAG_TYPE_META && size > 13+1+4)
428cc588
AH
336 flv_read_metabody(s, next);
337 else /* skip packet */
e1d8d7bb 338 av_log(s, AV_LOG_DEBUG, "skipping flv packet: type %d, size %d, flags %d\n", type, size, flags);
3d9aecb0 339 skip:
899681cd 340 url_fseek(s->pb, next, SEEK_SET);
ded01499 341 continue;
d4f5d74a
GM
342 }
343
ae58b54b
BC
344 /* skip empty data packets */
345 if (!size)
346 continue;
347
d4f5d74a
GM
348 /* now find stream */
349 for(i=0;i<s->nb_streams;i++) {
350 st = s->streams[i];
068f2a22
MN
351 if (st->id == is_audio)
352 break;
d4f5d74a 353 }
068f2a22 354 if(i == s->nb_streams){
c1023470 355 av_log(s, AV_LOG_ERROR, "invalid stream\n");
c8652b57 356 st= create_stream(s, is_audio);
a33cfa30 357 s->ctx_flags &= ~AVFMTCTX_NOHEADER;
6ed08157 358 }
c1023470 359// av_log(s, AV_LOG_DEBUG, "%d %X %d \n", is_audio, flags, st->discard);
6cac3a3b
AH
360 if( (st->discard >= AVDISCARD_NONKEY && !((flags & FLV_VIDEO_FRAMETYPE_MASK) == FLV_FRAME_KEY || is_audio))
361 ||(st->discard >= AVDISCARD_BIDIR && ((flags & FLV_VIDEO_FRAMETYPE_MASK) == FLV_FRAME_DISP_INTER && !is_audio))
f3356e9c
MN
362 || st->discard >= AVDISCARD_ALL
363 ){
899681cd 364 url_fseek(s->pb, next, SEEK_SET);
ded01499 365 continue;
b9866ebc 366 }
6cac3a3b 367 if ((flags & FLV_VIDEO_FRAMETYPE_MASK) == FLV_FRAME_KEY)
7ef94d22 368 av_add_index_entry(st, pos, dts, size, 0, AVINDEX_KEYFRAME);
068f2a22
MN
369 break;
370 }
371
15f14fc7 372 // if not streamed and no duration from metadata then seek to end to find the duration from the timestamps
fdf46622 373 if(!url_is_streamed(s->pb) && (!s->duration || s->duration==AV_NOPTS_VALUE)){
15f14fc7 374 int size;
4fe8a452
PM
375 const int64_t pos= url_ftell(s->pb);
376 const int64_t fsize= url_fsize(s->pb);
899681cd
BA
377 url_fseek(s->pb, fsize-4, SEEK_SET);
378 size= get_be32(s->pb);
379 url_fseek(s->pb, fsize-3-size, SEEK_SET);
380 if(size == get_be24(s->pb) + 11){
b126dee9
MS
381 uint32_t ts = get_be24(s->pb);
382 ts |= get_byte(s->pb) << 24;
383 s->duration = ts * (int64_t)AV_TIME_BASE / 1000;
15f14fc7 384 }
899681cd 385 url_fseek(s->pb, pos, SEEK_SET);
15f14fc7
MN
386 }
387
068f2a22 388 if(is_audio){
2f3d7ea9 389 if(!st->codec->channels || !st->codec->sample_rate || !st->codec->bits_per_coded_sample) {
6cac3a3b 390 st->codec->channels = (flags & FLV_AUDIO_CHANNEL_MASK) == FLV_STEREO ? 2 : 1;
7f8cd075 391 st->codec->sample_rate = (44100 << ((flags & FLV_AUDIO_SAMPLERATE_MASK) >> FLV_AUDIO_SAMPLERATE_OFFSET) >> 3);
dd1c8f3e 392 st->codec->bits_per_coded_sample = (flags & FLV_AUDIO_SAMPLESIZE_MASK) ? 16 : 8;
2f3d7ea9
MN
393 }
394 if(!st->codec->codec_id){
428cc588 395 flv_set_audio_codec(s, st, flags & FLV_AUDIO_CODECID_MASK);
068f2a22
MN
396 }
397 }else{
428cc588 398 size -= flv_set_video_codec(s, st, flags & FLV_VIDEO_CODECID_MASK);
bb01a3f0
MN
399 }
400
04fd3e81
BC
401 if (st->codec->codec_id == CODEC_ID_AAC ||
402 st->codec->codec_id == CODEC_ID_H264) {
403 int type = get_byte(s->pb);
404 size--;
405 if (st->codec->codec_id == CODEC_ID_H264) {
ebd61055
BC
406 int32_t cts = (get_be24(s->pb)+0xff800000)^0xff800000; // sign extension
407 pts = dts + cts;
408 if (cts < 0) { // dts are wrong
409 flv->wrong_dts = 1;
410 av_log(s, AV_LOG_WARNING, "negative cts, previous timestamps might be wrong\n");
411 }
412 if (flv->wrong_dts)
413 dts = AV_NOPTS_VALUE;
04fd3e81
BC
414 }
415 if (type == 0) {
6298eb81 416 if ((ret = flv_get_extradata(s, st, size)) < 0)
04fd3e81 417 return ret;
d2718187
BC
418 if (st->codec->codec_id == CODEC_ID_AAC) {
419 MPEG4AudioConfig cfg;
420 ff_mpeg4audio_get_config(&cfg, st->codec->extradata,
421 st->codec->extradata_size);
5aea268d 422 st->codec->channels = cfg.channels;
7d6096e4
BC
423 if (cfg.ext_sample_rate)
424 st->codec->sample_rate = cfg.ext_sample_rate;
425 else
426 st->codec->sample_rate = cfg.sample_rate;
dfd2a005 427 av_dlog(s, "mp4a config channels %d sample rate %d\n",
d2718187
BC
428 st->codec->channels, st->codec->sample_rate);
429 }
430
527c2e64
HC
431 ret = AVERROR(EAGAIN);
432 goto leave;
04fd3e81
BC
433 }
434 }
435
fcb4228c 436 /* skip empty data packets */
527c2e64
HC
437 if (!size) {
438 ret = AVERROR(EAGAIN);
439 goto leave;
440 }
fcb4228c 441
6298eb81 442 ret= av_get_packet(s->pb, pkt, size);
634b927f 443 if (ret < 0) {
6f3e0b21 444 return AVERROR(EIO);
d4f5d74a
GM
445 }
446 /* note: we need to modify the packet size here to handle the last
447 packet */
448 pkt->size = ret;
7ef94d22 449 pkt->dts = dts;
ebd61055 450 pkt->pts = pts == AV_NOPTS_VALUE ? dts : pts;
d4f5d74a 451 pkt->stream_index = st->index;
115329f1 452
6cac3a3b 453 if (is_audio || ((flags & FLV_VIDEO_FRAMETYPE_MASK) == FLV_FRAME_KEY))
cc947f04 454 pkt->flags |= AV_PKT_FLAG_KEY;
115329f1 455
527c2e64
HC
456leave:
457 url_fskip(s->pb, 4);
d4f5d74a
GM
458 return ret;
459}
460
fc8fa007
HC
461static int flv_read_seek(AVFormatContext *s, int stream_index,
462 int64_t ts, int flags)
463{
464 return av_url_read_fseek(s->pb, stream_index, ts, flags);
465}
466
467#if 0 /* don't know enough to implement this */
468static int flv_read_seek2(AVFormatContext *s, int stream_index,
469 int64_t min_ts, int64_t ts, int64_t max_ts, int flags)
470{
471 int ret = AVERROR(ENOSYS);
472
473 if (ts - min_ts > (uint64_t)(max_ts - ts)) flags |= AVSEEK_FLAG_BACKWARD;
474
475 if (url_is_streamed(s->pb)) {
476 if (stream_index < 0) {
477 stream_index = av_find_default_stream_index(s);
478 if (stream_index < 0)
479 return -1;
480
481 /* timestamp for default must be expressed in AV_TIME_BASE units */
482 ts = av_rescale_rnd(ts, 1000, AV_TIME_BASE,
483 flags & AVSEEK_FLAG_BACKWARD ? AV_ROUND_DOWN : AV_ROUND_UP);
484 }
485 ret = av_url_read_fseek(s->pb, stream_index, ts, flags);
486 }
487
488 if (ret == AVERROR(ENOSYS))
489 ret = av_seek_frame(s, stream_index, ts, flags);
490 return ret;
491}
492#endif
493
c6610a21 494AVInputFormat ff_flv_demuxer = {
d4f5d74a 495 "flv",
bde15e74 496 NULL_IF_CONFIG_SMALL("FLV format"),
ebd61055 497 sizeof(FLVContext),
d4f5d74a
GM
498 flv_probe,
499 flv_read_header,
500 flv_read_packet,
fc8fa007
HC
501 .read_seek = flv_read_seek,
502#if 0
503 .read_seek2 = flv_read_seek2,
504#endif
d4f5d74a
GM
505 .extensions = "flv",
506 .value = CODEC_ID_FLV1,
507};