libavcodec: Define a side data type for new extradata
[libav.git] / libavformat / flvdec.c
CommitLineData
d4f5d74a 1/*
7fbde343 2 * FLV demuxer
2912e87a 3 * Copyright (c) 2003 The Libav 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 *
2912e87a 10 * This file is part of Libav.
b78e7197 11 *
2912e87a 12 * Libav 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 *
2912e87a 17 * Libav 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
2912e87a 23 * License along with Libav; 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"
d2d67e42 28#include "libavutil/dict.h"
3383a53e 29#include "libavutil/intfloat.h"
d3f751e6 30#include "libavutil/mathematics.h"
c1c206b3 31#include "libavcodec/bytestream.h"
d2718187 32#include "libavcodec/mpeg4audio.h"
d4f5d74a 33#include "avformat.h"
c3f9ebf7 34#include "internal.h"
933e90a6 35#include "avio_internal.h"
6cac3a3b 36#include "flv.h"
d4f5d74a 37
cb7e2c1c
KA
38#define KEYFRAMES_TAG "keyframes"
39#define KEYFRAMES_TIMESTAMP_TAG "times"
40#define KEYFRAMES_BYTEOFFSET_TAG "filepositions"
41
ebd61055
BC
42typedef struct {
43 int wrong_dts; ///< wrong dts due to negative cts
44} FLVContext;
45
d4f5d74a
GM
46static int flv_probe(AVProbeData *p)
47{
48 const uint8_t *d;
49
d4f5d74a 50 d = p->buf;
37e34df5 51 if (d[0] == 'F' && d[1] == 'L' && d[2] == 'V' && d[3] < 5 && d[5]==0 && AV_RB32(d+5)>8) {
74248229 52 return AVPROBE_SCORE_MAX;
d4f5d74a
GM
53 }
54 return 0;
55}
56
428cc588
AH
57static void flv_set_audio_codec(AVFormatContext *s, AVStream *astream, int flv_codecid) {
58 AVCodecContext *acodec = astream->codec;
59 switch(flv_codecid) {
60 //no distinction between S16 and S8 PCM codec flags
44de39f9 61 case FLV_CODECID_PCM:
8e9efe43 62 acodec->codec_id = acodec->bits_per_coded_sample == 8 ? CODEC_ID_PCM_U8 :
63613fe6 63#if HAVE_BIGENDIAN
58293e57
MN
64 CODEC_ID_PCM_S16BE;
65#else
66 CODEC_ID_PCM_S16LE;
67#endif
68 break;
428cc588 69 case FLV_CODECID_PCM_LE:
8e9efe43 70 acodec->codec_id = acodec->bits_per_coded_sample == 8 ? CODEC_ID_PCM_U8 : CODEC_ID_PCM_S16LE; break;
04fd3e81 71 case FLV_CODECID_AAC : acodec->codec_id = CODEC_ID_AAC; break;
428cc588 72 case FLV_CODECID_ADPCM: acodec->codec_id = CODEC_ID_ADPCM_SWF; break;
f96d0eef
BC
73 case FLV_CODECID_SPEEX:
74 acodec->codec_id = CODEC_ID_SPEEX;
75 acodec->sample_rate = 16000;
76 break;
57004ff1 77 case FLV_CODECID_MP3 : acodec->codec_id = CODEC_ID_MP3 ; astream->need_parsing = AVSTREAM_PARSE_FULL; break;
88cb61bb 78 case FLV_CODECID_NELLYMOSER_8KHZ_MONO:
428cc588 79 acodec->sample_rate = 8000; //in case metadata does not otherwise declare samplerate
caa7ad5d
TF
80 acodec->codec_id = CODEC_ID_NELLYMOSER;
81 break;
82 case FLV_CODECID_NELLYMOSER_16KHZ_MONO:
83 acodec->sample_rate = 16000;
84 acodec->codec_id = CODEC_ID_NELLYMOSER;
85 break;
428cc588 86 case FLV_CODECID_NELLYMOSER:
636b13c5
BL
87 acodec->codec_id = CODEC_ID_NELLYMOSER;
88 break;
428cc588
AH
89 default:
90 av_log(s, AV_LOG_INFO, "Unsupported audio codec (%x)\n", flv_codecid >> FLV_AUDIO_CODECID_OFFSET);
91 acodec->codec_tag = flv_codecid >> FLV_AUDIO_CODECID_OFFSET;
92 }
93}
94
95static int flv_set_video_codec(AVFormatContext *s, AVStream *vstream, int flv_codecid) {
96 AVCodecContext *vcodec = vstream->codec;
97 switch(flv_codecid) {
98 case FLV_CODECID_H263 : vcodec->codec_id = CODEC_ID_FLV1 ; break;
99 case FLV_CODECID_SCREEN: vcodec->codec_id = CODEC_ID_FLASHSV; break;
0aa6a518 100 case FLV_CODECID_SCREEN2: vcodec->codec_id = CODEC_ID_FLASHSV2; break;
428cc588 101 case FLV_CODECID_VP6 : vcodec->codec_id = CODEC_ID_VP6F ;
99904603
AJ
102 case FLV_CODECID_VP6A :
103 if(flv_codecid == FLV_CODECID_VP6A)
104 vcodec->codec_id = CODEC_ID_VP6A;
428cc588
AH
105 if(vcodec->extradata_size != 1) {
106 vcodec->extradata_size = 1;
107 vcodec->extradata = av_malloc(1);
108 }
b7effd4e 109 vcodec->extradata[0] = avio_r8(s->pb);
428cc588 110 return 1; // 1 byte body size adjustment for flv_read_packet()
04fd3e81
BC
111 case FLV_CODECID_H264:
112 vcodec->codec_id = CODEC_ID_H264;
113 return 3; // not 4, reading packet type will consume one byte
428cc588
AH
114 default:
115 av_log(s, AV_LOG_INFO, "Unsupported video codec (%x)\n", flv_codecid);
116 vcodec->codec_tag = flv_codecid;
117 }
118
119 return 0;
120}
121
ae628ec1 122static int amf_get_string(AVIOContext *ioc, char *buffer, int buffsize) {
b7effd4e 123 int length = avio_rb16(ioc);
cc38e063 124 if(length >= buffsize) {
45a8a02a 125 avio_skip(ioc, length);
cc38e063
MN
126 return -1;
127 }
896bcd2e 128
b7effd4e 129 avio_read(ioc, buffer, length);
896bcd2e 130
cc38e063 131 buffer[length] = '\0';
896bcd2e 132
cc38e063 133 return length;
896bcd2e
MN
134}
135
cb7e2c1c
KA
136static int parse_keyframes_index(AVFormatContext *s, AVIOContext *ioc, AVStream *vstream, int64_t max_pos) {
137 unsigned int arraylen = 0, timeslen = 0, fileposlen = 0, i;
138 double num_val;
139 char str_val[256];
140 int64_t *times = NULL;
141 int64_t *filepositions = NULL;
578d6861 142 int ret = AVERROR(ENOSYS);
b5304f7b 143 int64_t initial_pos = avio_tell(ioc);
bafff166
MS
144 AVDictionaryEntry *creator = av_dict_get(s->metadata, "metadatacreator",
145 NULL, 0);
146
147 if (creator && !strcmp(creator->value, "MEGA")) {
148 /* Files with this metadatacreator tag seem to have filepositions
149 * pointing at the 4 trailer bytes of the previous packet,
150 * which isn't the norm (nor what we expect here, nor what
151 * jwplayer + lighttpd expect, nor what flvtool2 produces).
152 * Just ignore the index in this case, instead of risking trying
153 * to adjust it to something that might or might not work. */
154 return 0;
155 }
cb7e2c1c
KA
156
157 while (avio_tell(ioc) < max_pos - 2 && amf_get_string(ioc, str_val, sizeof(str_val)) > 0) {
158 int64_t* current_array;
159
160 // Expect array object in context
161 if (avio_r8(ioc) != AMF_DATA_TYPE_ARRAY)
162 break;
163
164 arraylen = avio_rb32(ioc);
a246cefa
MN
165 if (arraylen >> 28)
166 break;
167
cb7e2c1c
KA
168 /*
169 * Expect only 'times' or 'filepositions' sub-arrays in other case refuse to use such metadata
170 * for indexing
171 */
172 if (!strcmp(KEYFRAMES_TIMESTAMP_TAG, str_val) && !times) {
173 if (!(times = av_mallocz(sizeof(*times) * arraylen))) {
174 ret = AVERROR(ENOMEM);
175 goto finish;
176 }
177 timeslen = arraylen;
178 current_array = times;
179 } else if (!strcmp(KEYFRAMES_BYTEOFFSET_TAG, str_val) && !filepositions) {
180 if (!(filepositions = av_mallocz(sizeof(*filepositions) * arraylen))) {
181 ret = AVERROR(ENOMEM);
182 goto finish;
183 }
184 fileposlen = arraylen;
185 current_array = filepositions;
186 } else // unexpected metatag inside keyframes, will not use such metadata for indexing
187 break;
188
189 for (i = 0; i < arraylen && avio_tell(ioc) < max_pos - 1; i++) {
190 if (avio_r8(ioc) != AMF_DATA_TYPE_NUMBER)
191 goto finish;
3383a53e 192 num_val = av_int2double(avio_rb64(ioc));
cb7e2c1c
KA
193 current_array[i] = num_val;
194 }
578d6861
MS
195 if (times && filepositions) {
196 // All done, exiting at a position allowing amf_parse_object
197 // to finish parsing the object
198 ret = 0;
199 break;
200 }
cb7e2c1c
KA
201 }
202
2b4e49d4
LA
203 if (!ret && timeslen == fileposlen)
204 for (i = 0; i < fileposlen; i++)
cb7e2c1c
KA
205 av_add_index_entry(vstream, filepositions[i], times[i]*1000, 0, 0, AVINDEX_KEYFRAME);
206 else
207 av_log(s, AV_LOG_WARNING, "Invalid keyframes object, skipping.\n");
208
209finish:
210 av_freep(&times);
211 av_freep(&filepositions);
578d6861
MS
212 // If we got unexpected data, but successfully reset back to
213 // the start pos, the caller can continue parsing
214 if (ret < 0 && avio_seek(ioc, initial_pos, SEEK_SET) > 0)
215 return 0;
cb7e2c1c
KA
216 return ret;
217}
218
4fe8a452 219static int amf_parse_object(AVFormatContext *s, AVStream *astream, AVStream *vstream, const char *key, int64_t max_pos, int depth) {
428cc588 220 AVCodecContext *acodec, *vcodec;
ae628ec1 221 AVIOContext *ioc;
428cc588 222 AMFDataType amf_type;
cc38e063 223 char str_val[256];
428cc588
AH
224 double num_val;
225
226 num_val = 0;
899681cd 227 ioc = s->pb;
428cc588 228
b7effd4e 229 amf_type = avio_r8(ioc);
428cc588
AH
230
231 switch(amf_type) {
232 case AMF_DATA_TYPE_NUMBER:
3383a53e 233 num_val = av_int2double(avio_rb64(ioc)); break;
428cc588 234 case AMF_DATA_TYPE_BOOL:
b7effd4e 235 num_val = avio_r8(ioc); break;
428cc588 236 case AMF_DATA_TYPE_STRING:
cc38e063 237 if(amf_get_string(ioc, str_val, sizeof(str_val)) < 0)
428cc588
AH
238 return -1;
239 break;
240 case AMF_DATA_TYPE_OBJECT: {
241 unsigned int keylen;
242
f4b51d06
RD
243 if ((vstream || astream) && key && !strcmp(KEYFRAMES_TAG, key) && depth == 1)
244 if (parse_keyframes_index(s, ioc, vstream ? vstream : astream,
245 max_pos) < 0)
cb7e2c1c
KA
246 return -1;
247
a2704c97 248 while(avio_tell(ioc) < max_pos - 2 && (keylen = avio_rb16(ioc))) {
45a8a02a 249 avio_skip(ioc, keylen); //skip key string
428cc588
AH
250 if(amf_parse_object(s, NULL, NULL, NULL, max_pos, depth + 1) < 0)
251 return -1; //if we couldn't skip, bomb out.
252 }
b7effd4e 253 if(avio_r8(ioc) != AMF_END_OF_OBJECT)
428cc588
AH
254 return -1;
255 }
256 break;
257 case AMF_DATA_TYPE_NULL:
258 case AMF_DATA_TYPE_UNDEFINED:
259 case AMF_DATA_TYPE_UNSUPPORTED:
260 break; //these take up no additional space
261 case AMF_DATA_TYPE_MIXEDARRAY:
45a8a02a 262 avio_skip(ioc, 4); //skip 32-bit max array index
a2704c97 263 while(avio_tell(ioc) < max_pos - 2 && amf_get_string(ioc, str_val, sizeof(str_val)) > 0) {
428cc588 264 //this is the only case in which we would want a nested parse to not skip over the object
cc38e063 265 if(amf_parse_object(s, astream, vstream, str_val, max_pos, depth + 1) < 0)
428cc588
AH
266 return -1;
267 }
b7effd4e 268 if(avio_r8(ioc) != AMF_END_OF_OBJECT)
428cc588
AH
269 return -1;
270 break;
271 case AMF_DATA_TYPE_ARRAY: {
272 unsigned int arraylen, i;
273
b7effd4e 274 arraylen = avio_rb32(ioc);
a2704c97 275 for(i = 0; i < arraylen && avio_tell(ioc) < max_pos - 1; i++) {
428cc588
AH
276 if(amf_parse_object(s, NULL, NULL, NULL, max_pos, depth + 1) < 0)
277 return -1; //if we couldn't skip, bomb out.
278 }
279 }
280 break;
281 case AMF_DATA_TYPE_DATE:
45a8a02a 282 avio_skip(ioc, 8 + 2); //timestamp (double) and UTC offset (int16)
428cc588
AH
283 break;
284 default: //unsupported type, we couldn't skip
285 return -1;
286 }
287
288 if(depth == 1 && key) { //only look for metadata values when we are not nested and key != NULL
289 acodec = astream ? astream->codec : NULL;
290 vcodec = vstream ? vstream->codec : NULL;
291
b204c46d
MS
292 if (amf_type == AMF_DATA_TYPE_NUMBER) {
293 if (!strcmp(key, "duration"))
294 s->duration = num_val * AV_TIME_BASE;
295 else if (!strcmp(key, "videodatarate") && vcodec && 0 <= (int)(num_val * 1024.0))
296 vcodec->bit_rate = num_val * 1024.0;
297 else if (!strcmp(key, "audiodatarate") && acodec && 0 <= (int)(num_val * 1024.0))
298 acodec->bit_rate = num_val * 1024.0;
299 }
300
5e87222f
MS
301 if (!strcmp(key, "duration") ||
302 !strcmp(key, "filesize") ||
303 !strcmp(key, "width") ||
304 !strcmp(key, "height") ||
305 !strcmp(key, "videodatarate") ||
306 !strcmp(key, "framerate") ||
307 !strcmp(key, "videocodecid") ||
308 !strcmp(key, "audiodatarate") ||
309 !strcmp(key, "audiosamplerate") ||
310 !strcmp(key, "audiosamplesize") ||
311 !strcmp(key, "stereo") ||
312 !strcmp(key, "audiocodecid"))
313 return 0;
314
428cc588 315 if(amf_type == AMF_DATA_TYPE_BOOL) {
cc38e063 316 av_strlcpy(str_val, num_val > 0 ? "true" : "false", sizeof(str_val));
d2d67e42 317 av_dict_set(&s->metadata, key, str_val, 0);
428cc588 318 } else if(amf_type == AMF_DATA_TYPE_NUMBER) {
cc38e063 319 snprintf(str_val, sizeof(str_val), "%.f", num_val);
d2d67e42 320 av_dict_set(&s->metadata, key, str_val, 0);
df2bd71a 321 } else if (amf_type == AMF_DATA_TYPE_STRING)
d2d67e42 322 av_dict_set(&s->metadata, key, str_val, 0);
428cc588
AH
323 }
324
325 return 0;
326}
327
4fe8a452 328static int flv_read_metabody(AVFormatContext *s, int64_t next_pos) {
428cc588
AH
329 AMFDataType type;
330 AVStream *stream, *astream, *vstream;
ae628ec1 331 AVIOContext *ioc;
4eec2606 332 int i;
cc38e063 333 char buffer[11]; //only needs to hold the string "onMetaData". Anything longer is something we don't want.
428cc588
AH
334
335 astream = NULL;
336 vstream = NULL;
899681cd 337 ioc = s->pb;
428cc588
AH
338
339 //first object needs to be "onMetaData" string
b7effd4e 340 type = avio_r8(ioc);
cc38e063 341 if(type != AMF_DATA_TYPE_STRING || amf_get_string(ioc, buffer, sizeof(buffer)) < 0 || strcmp(buffer, "onMetaData"))
428cc588
AH
342 return -1;
343
344 //find the streams now so that amf_parse_object doesn't need to do the lookup every time it is called.
345 for(i = 0; i < s->nb_streams; i++) {
346 stream = s->streams[i];
72415b2a
SS
347 if (stream->codec->codec_type == AVMEDIA_TYPE_AUDIO) astream = stream;
348 else if(stream->codec->codec_type == AVMEDIA_TYPE_VIDEO) vstream = stream;
428cc588
AH
349 }
350
351 //parse the second object (we want a mixed array)
cc38e063 352 if(amf_parse_object(s, astream, vstream, buffer, next_pos, 0) < 0)
428cc588
AH
353 return -1;
354
355 return 0;
356}
357
6f910bcf 358static AVStream *create_stream(AVFormatContext *s, int is_audio){
84ad31ff 359 AVStream *st = avformat_new_stream(s, NULL);
6f910bcf
MN
360 if (!st)
361 return NULL;
84ad31ff 362 st->id = is_audio;
72415b2a 363 st->codec->codec_type = is_audio ? AVMEDIA_TYPE_AUDIO : AVMEDIA_TYPE_VIDEO;
c3f9ebf7 364 avpriv_set_pts_info(st, 32, 1, 1000); /* 32 bit pts in ms */
6f910bcf
MN
365 return st;
366}
367
d4f5d74a
GM
368static int flv_read_header(AVFormatContext *s,
369 AVFormatParameters *ap)
370{
15f14fc7 371 int offset, flags;
d4f5d74a 372
45a8a02a 373 avio_skip(s->pb, 4);
b7effd4e 374 flags = avio_r8(s->pb);
031311cb
AB
375 /* old flvtool cleared this field */
376 /* FIXME: better fix needed */
377 if (!flags) {
378 flags = FLV_HEADER_FLAG_HASVIDEO | FLV_HEADER_FLAG_HASAUDIO;
379 av_log(s, AV_LOG_WARNING, "Broken FLV file, which says no streams present, this might fail\n");
380 }
d4f5d74a 381
b41497e9
MN
382 if((flags & (FLV_HEADER_FLAG_HASVIDEO|FLV_HEADER_FLAG_HASAUDIO))
383 != (FLV_HEADER_FLAG_HASVIDEO|FLV_HEADER_FLAG_HASAUDIO))
384 s->ctx_flags |= AVFMTCTX_NOHEADER;
385
4eb0c665 386 if(flags & FLV_HEADER_FLAG_HASVIDEO){
6f910bcf 387 if(!create_stream(s, 0))
769e10f0 388 return AVERROR(ENOMEM);
4eb0c665
MN
389 }
390 if(flags & FLV_HEADER_FLAG_HASAUDIO){
6f910bcf 391 if(!create_stream(s, 1))
769e10f0 392 return AVERROR(ENOMEM);
4eb0c665
MN
393 }
394
b7effd4e 395 offset = avio_rb32(s->pb);
6b4aa5da 396 avio_seek(s->pb, offset, SEEK_SET);
45a8a02a 397 avio_skip(s->pb, 4);
d4f5d74a 398
aeb20f7f
N
399 s->start_time = 0;
400
d4f5d74a
GM
401 return 0;
402}
403
04fd3e81
BC
404static int flv_get_extradata(AVFormatContext *s, AVStream *st, int size)
405{
406 av_free(st->codec->extradata);
407 st->codec->extradata = av_mallocz(size + FF_INPUT_BUFFER_PADDING_SIZE);
408 if (!st->codec->extradata)
409 return AVERROR(ENOMEM);
410 st->codec->extradata_size = size;
b7effd4e 411 avio_read(s->pb, st->codec->extradata, st->codec->extradata_size);
04fd3e81
BC
412 return 0;
413}
414
d4f5d74a
GM
415static int flv_read_packet(AVFormatContext *s, AVPacket *pkt)
416{
ebd61055 417 FLVContext *flv = s->priv_data;
4fe8a452
PM
418 int ret, i, type, size, flags, is_audio;
419 int64_t next, pos;
ebd61055 420 int64_t dts, pts = AV_NOPTS_VALUE;
923bd441 421 AVStream *st = NULL;
115329f1 422
45a8a02a 423 for(;;avio_skip(s->pb, 4)){ /* pkt size is repeated at end. skip it */
a2704c97 424 pos = avio_tell(s->pb);
b7effd4e
AK
425 type = avio_r8(s->pb);
426 size = avio_rb24(s->pb);
427 dts = avio_rb24(s->pb);
428 dts |= avio_r8(s->pb) << 24;
13220b18 429 av_dlog(s, "type:%d, size:%d, dts:%"PRId64"\n", type, size, dts);
66e5b1df 430 if (s->pb->eof_reached)
0e9602ef 431 return AVERROR_EOF;
45a8a02a 432 avio_skip(s->pb, 3); /* stream id, always 0 */
d4f5d74a 433 flags = 0;
115329f1 434
068f2a22
MN
435 if(size == 0)
436 continue;
115329f1 437
a2704c97 438 next= size + avio_tell(s->pb);
dd9f5916 439
6cac3a3b 440 if (type == FLV_TAG_TYPE_AUDIO) {
068f2a22 441 is_audio=1;
b7effd4e 442 flags = avio_r8(s->pb);
6298eb81 443 size--;
6cac3a3b 444 } else if (type == FLV_TAG_TYPE_VIDEO) {
068f2a22 445 is_audio=0;
b7effd4e 446 flags = avio_r8(s->pb);
6298eb81 447 size--;
3d9aecb0
BC
448 if ((flags & 0xf0) == 0x50) /* video info / command frame */
449 goto skip;
d4f5d74a 450 } else {
09e54e1f 451 if (type == FLV_TAG_TYPE_META && size > 13+1+4)
428cc588
AH
452 flv_read_metabody(s, next);
453 else /* skip packet */
e1d8d7bb 454 av_log(s, AV_LOG_DEBUG, "skipping flv packet: type %d, size %d, flags %d\n", type, size, flags);
3d9aecb0 455 skip:
6b4aa5da 456 avio_seek(s->pb, next, SEEK_SET);
ded01499 457 continue;
d4f5d74a
GM
458 }
459
ae58b54b
BC
460 /* skip empty data packets */
461 if (!size)
462 continue;
463
d4f5d74a
GM
464 /* now find stream */
465 for(i=0;i<s->nb_streams;i++) {
466 st = s->streams[i];
068f2a22
MN
467 if (st->id == is_audio)
468 break;
d4f5d74a 469 }
068f2a22 470 if(i == s->nb_streams){
c1023470 471 av_log(s, AV_LOG_ERROR, "invalid stream\n");
c8652b57 472 st= create_stream(s, is_audio);
a33cfa30 473 s->ctx_flags &= ~AVFMTCTX_NOHEADER;
6ed08157 474 }
13220b18 475 av_dlog(s, "%d %X %d \n", is_audio, flags, st->discard);
6cac3a3b
AH
476 if( (st->discard >= AVDISCARD_NONKEY && !((flags & FLV_VIDEO_FRAMETYPE_MASK) == FLV_FRAME_KEY || is_audio))
477 ||(st->discard >= AVDISCARD_BIDIR && ((flags & FLV_VIDEO_FRAMETYPE_MASK) == FLV_FRAME_DISP_INTER && !is_audio))
f3356e9c
MN
478 || st->discard >= AVDISCARD_ALL
479 ){
6b4aa5da 480 avio_seek(s->pb, next, SEEK_SET);
ded01499 481 continue;
b9866ebc 482 }
6cac3a3b 483 if ((flags & FLV_VIDEO_FRAMETYPE_MASK) == FLV_FRAME_KEY)
7ef94d22 484 av_add_index_entry(st, pos, dts, size, 0, AVINDEX_KEYFRAME);
068f2a22
MN
485 break;
486 }
487
15f14fc7 488 // if not streamed and no duration from metadata then seek to end to find the duration from the timestamps
8978feda 489 if(s->pb->seekable && (!s->duration || s->duration==AV_NOPTS_VALUE)){
15f14fc7 490 int size;
a2704c97 491 const int64_t pos= avio_tell(s->pb);
76aa876e 492 const int64_t fsize= avio_size(s->pb);
6b4aa5da 493 avio_seek(s->pb, fsize-4, SEEK_SET);
b7effd4e 494 size= avio_rb32(s->pb);
6b4aa5da 495 avio_seek(s->pb, fsize-3-size, SEEK_SET);
b7effd4e
AK
496 if(size == avio_rb24(s->pb) + 11){
497 uint32_t ts = avio_rb24(s->pb);
498 ts |= avio_r8(s->pb) << 24;
b126dee9 499 s->duration = ts * (int64_t)AV_TIME_BASE / 1000;
15f14fc7 500 }
6b4aa5da 501 avio_seek(s->pb, pos, SEEK_SET);
15f14fc7
MN
502 }
503
068f2a22 504 if(is_audio){
2f3d7ea9 505 if(!st->codec->channels || !st->codec->sample_rate || !st->codec->bits_per_coded_sample) {
6cac3a3b 506 st->codec->channels = (flags & FLV_AUDIO_CHANNEL_MASK) == FLV_STEREO ? 2 : 1;
7f8cd075 507 st->codec->sample_rate = (44100 << ((flags & FLV_AUDIO_SAMPLERATE_MASK) >> FLV_AUDIO_SAMPLERATE_OFFSET) >> 3);
dd1c8f3e 508 st->codec->bits_per_coded_sample = (flags & FLV_AUDIO_SAMPLESIZE_MASK) ? 16 : 8;
2f3d7ea9
MN
509 }
510 if(!st->codec->codec_id){
428cc588 511 flv_set_audio_codec(s, st, flags & FLV_AUDIO_CODECID_MASK);
068f2a22
MN
512 }
513 }else{
428cc588 514 size -= flv_set_video_codec(s, st, flags & FLV_VIDEO_CODECID_MASK);
bb01a3f0
MN
515 }
516
04fd3e81
BC
517 if (st->codec->codec_id == CODEC_ID_AAC ||
518 st->codec->codec_id == CODEC_ID_H264) {
b7effd4e 519 int type = avio_r8(s->pb);
04fd3e81
BC
520 size--;
521 if (st->codec->codec_id == CODEC_ID_H264) {
b7effd4e 522 int32_t cts = (avio_rb24(s->pb)+0xff800000)^0xff800000; // sign extension
ebd61055
BC
523 pts = dts + cts;
524 if (cts < 0) { // dts are wrong
525 flv->wrong_dts = 1;
526 av_log(s, AV_LOG_WARNING, "negative cts, previous timestamps might be wrong\n");
527 }
528 if (flv->wrong_dts)
529 dts = AV_NOPTS_VALUE;
04fd3e81
BC
530 }
531 if (type == 0) {
6298eb81 532 if ((ret = flv_get_extradata(s, st, size)) < 0)
04fd3e81 533 return ret;
d2718187
BC
534 if (st->codec->codec_id == CODEC_ID_AAC) {
535 MPEG4AudioConfig cfg;
59a9a235 536 avpriv_mpeg4audio_get_config(&cfg, st->codec->extradata,
fd095539 537 st->codec->extradata_size * 8, 1);
5aea268d 538 st->codec->channels = cfg.channels;
7d6096e4
BC
539 if (cfg.ext_sample_rate)
540 st->codec->sample_rate = cfg.ext_sample_rate;
541 else
542 st->codec->sample_rate = cfg.sample_rate;
dfd2a005 543 av_dlog(s, "mp4a config channels %d sample rate %d\n",
d2718187
BC
544 st->codec->channels, st->codec->sample_rate);
545 }
546
527c2e64
HC
547 ret = AVERROR(EAGAIN);
548 goto leave;
04fd3e81
BC
549 }
550 }
551
fcb4228c 552 /* skip empty data packets */
527c2e64
HC
553 if (!size) {
554 ret = AVERROR(EAGAIN);
555 goto leave;
556 }
fcb4228c 557
6298eb81 558 ret= av_get_packet(s->pb, pkt, size);
634b927f 559 if (ret < 0) {
6f3e0b21 560 return AVERROR(EIO);
d4f5d74a
GM
561 }
562 /* note: we need to modify the packet size here to handle the last
563 packet */
564 pkt->size = ret;
7ef94d22 565 pkt->dts = dts;
ebd61055 566 pkt->pts = pts == AV_NOPTS_VALUE ? dts : pts;
d4f5d74a 567 pkt->stream_index = st->index;
115329f1 568
6cac3a3b 569 if (is_audio || ((flags & FLV_VIDEO_FRAMETYPE_MASK) == FLV_FRAME_KEY))
cc947f04 570 pkt->flags |= AV_PKT_FLAG_KEY;
115329f1 571
527c2e64 572leave:
45a8a02a 573 avio_skip(s->pb, 4);
d4f5d74a
GM
574 return ret;
575}
576
fc8fa007
HC
577static int flv_read_seek(AVFormatContext *s, int stream_index,
578 int64_t ts, int flags)
579{
ff1ec0c3 580 return avio_seek_time(s->pb, stream_index, ts, flags);
fc8fa007
HC
581}
582
583#if 0 /* don't know enough to implement this */
584static int flv_read_seek2(AVFormatContext *s, int stream_index,
585 int64_t min_ts, int64_t ts, int64_t max_ts, int flags)
586{
587 int ret = AVERROR(ENOSYS);
588
589 if (ts - min_ts > (uint64_t)(max_ts - ts)) flags |= AVSEEK_FLAG_BACKWARD;
590
8978feda 591 if (!s->pb->seekable) {
fc8fa007
HC
592 if (stream_index < 0) {
593 stream_index = av_find_default_stream_index(s);
594 if (stream_index < 0)
595 return -1;
596
597 /* timestamp for default must be expressed in AV_TIME_BASE units */
598 ts = av_rescale_rnd(ts, 1000, AV_TIME_BASE,
599 flags & AVSEEK_FLAG_BACKWARD ? AV_ROUND_DOWN : AV_ROUND_UP);
600 }
ff1ec0c3 601 ret = avio_seek_time(s->pb, stream_index, ts, flags);
fc8fa007
HC
602 }
603
604 if (ret == AVERROR(ENOSYS))
605 ret = av_seek_frame(s, stream_index, ts, flags);
606 return ret;
607}
608#endif
609
c6610a21 610AVInputFormat ff_flv_demuxer = {
dfc2c4d9
AK
611 .name = "flv",
612 .long_name = NULL_IF_CONFIG_SMALL("FLV format"),
613 .priv_data_size = sizeof(FLVContext),
614 .read_probe = flv_probe,
615 .read_header = flv_read_header,
616 .read_packet = flv_read_packet,
fc8fa007
HC
617 .read_seek = flv_read_seek,
618#if 0
619 .read_seek2 = flv_read_seek2,
620#endif
d4f5d74a
GM
621 .extensions = "flv",
622 .value = CODEC_ID_FLV1,
623};