libavformat: Add a utility function for adding parameter change side data
[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
251f320f
MS
44 uint8_t *new_extradata[2];
45 int new_extradata_size[2];
ebd61055
BC
46} FLVContext;
47
d4f5d74a
GM
48static int flv_probe(AVProbeData *p)
49{
50 const uint8_t *d;
51
d4f5d74a 52 d = p->buf;
37e34df5 53 if (d[0] == 'F' && d[1] == 'L' && d[2] == 'V' && d[3] < 5 && d[5]==0 && AV_RB32(d+5)>8) {
74248229 54 return AVPROBE_SCORE_MAX;
d4f5d74a
GM
55 }
56 return 0;
57}
58
428cc588
AH
59static void flv_set_audio_codec(AVFormatContext *s, AVStream *astream, int flv_codecid) {
60 AVCodecContext *acodec = astream->codec;
61 switch(flv_codecid) {
62 //no distinction between S16 and S8 PCM codec flags
44de39f9 63 case FLV_CODECID_PCM:
8e9efe43 64 acodec->codec_id = acodec->bits_per_coded_sample == 8 ? CODEC_ID_PCM_U8 :
63613fe6 65#if HAVE_BIGENDIAN
58293e57
MN
66 CODEC_ID_PCM_S16BE;
67#else
68 CODEC_ID_PCM_S16LE;
69#endif
70 break;
428cc588 71 case FLV_CODECID_PCM_LE:
8e9efe43 72 acodec->codec_id = acodec->bits_per_coded_sample == 8 ? CODEC_ID_PCM_U8 : CODEC_ID_PCM_S16LE; break;
04fd3e81 73 case FLV_CODECID_AAC : acodec->codec_id = CODEC_ID_AAC; break;
428cc588 74 case FLV_CODECID_ADPCM: acodec->codec_id = CODEC_ID_ADPCM_SWF; break;
f96d0eef
BC
75 case FLV_CODECID_SPEEX:
76 acodec->codec_id = CODEC_ID_SPEEX;
77 acodec->sample_rate = 16000;
78 break;
57004ff1 79 case FLV_CODECID_MP3 : acodec->codec_id = CODEC_ID_MP3 ; astream->need_parsing = AVSTREAM_PARSE_FULL; break;
88cb61bb 80 case FLV_CODECID_NELLYMOSER_8KHZ_MONO:
428cc588 81 acodec->sample_rate = 8000; //in case metadata does not otherwise declare samplerate
caa7ad5d
TF
82 acodec->codec_id = CODEC_ID_NELLYMOSER;
83 break;
84 case FLV_CODECID_NELLYMOSER_16KHZ_MONO:
85 acodec->sample_rate = 16000;
86 acodec->codec_id = CODEC_ID_NELLYMOSER;
87 break;
428cc588 88 case FLV_CODECID_NELLYMOSER:
636b13c5
BL
89 acodec->codec_id = CODEC_ID_NELLYMOSER;
90 break;
428cc588
AH
91 default:
92 av_log(s, AV_LOG_INFO, "Unsupported audio codec (%x)\n", flv_codecid >> FLV_AUDIO_CODECID_OFFSET);
93 acodec->codec_tag = flv_codecid >> FLV_AUDIO_CODECID_OFFSET;
94 }
95}
96
97static int flv_set_video_codec(AVFormatContext *s, AVStream *vstream, int flv_codecid) {
98 AVCodecContext *vcodec = vstream->codec;
99 switch(flv_codecid) {
100 case FLV_CODECID_H263 : vcodec->codec_id = CODEC_ID_FLV1 ; break;
101 case FLV_CODECID_SCREEN: vcodec->codec_id = CODEC_ID_FLASHSV; break;
0aa6a518 102 case FLV_CODECID_SCREEN2: vcodec->codec_id = CODEC_ID_FLASHSV2; break;
428cc588 103 case FLV_CODECID_VP6 : vcodec->codec_id = CODEC_ID_VP6F ;
99904603
AJ
104 case FLV_CODECID_VP6A :
105 if(flv_codecid == FLV_CODECID_VP6A)
106 vcodec->codec_id = CODEC_ID_VP6A;
428cc588
AH
107 if(vcodec->extradata_size != 1) {
108 vcodec->extradata_size = 1;
109 vcodec->extradata = av_malloc(1);
110 }
b7effd4e 111 vcodec->extradata[0] = avio_r8(s->pb);
428cc588 112 return 1; // 1 byte body size adjustment for flv_read_packet()
04fd3e81
BC
113 case FLV_CODECID_H264:
114 vcodec->codec_id = CODEC_ID_H264;
115 return 3; // not 4, reading packet type will consume one byte
428cc588
AH
116 default:
117 av_log(s, AV_LOG_INFO, "Unsupported video codec (%x)\n", flv_codecid);
118 vcodec->codec_tag = flv_codecid;
119 }
120
121 return 0;
122}
123
ae628ec1 124static int amf_get_string(AVIOContext *ioc, char *buffer, int buffsize) {
b7effd4e 125 int length = avio_rb16(ioc);
cc38e063 126 if(length >= buffsize) {
45a8a02a 127 avio_skip(ioc, length);
cc38e063
MN
128 return -1;
129 }
896bcd2e 130
b7effd4e 131 avio_read(ioc, buffer, length);
896bcd2e 132
cc38e063 133 buffer[length] = '\0';
896bcd2e 134
cc38e063 135 return length;
896bcd2e
MN
136}
137
cb7e2c1c
KA
138static int parse_keyframes_index(AVFormatContext *s, AVIOContext *ioc, AVStream *vstream, int64_t max_pos) {
139 unsigned int arraylen = 0, timeslen = 0, fileposlen = 0, i;
140 double num_val;
141 char str_val[256];
142 int64_t *times = NULL;
143 int64_t *filepositions = NULL;
578d6861 144 int ret = AVERROR(ENOSYS);
b5304f7b 145 int64_t initial_pos = avio_tell(ioc);
bafff166
MS
146 AVDictionaryEntry *creator = av_dict_get(s->metadata, "metadatacreator",
147 NULL, 0);
148
149 if (creator && !strcmp(creator->value, "MEGA")) {
150 /* Files with this metadatacreator tag seem to have filepositions
151 * pointing at the 4 trailer bytes of the previous packet,
152 * which isn't the norm (nor what we expect here, nor what
153 * jwplayer + lighttpd expect, nor what flvtool2 produces).
154 * Just ignore the index in this case, instead of risking trying
155 * to adjust it to something that might or might not work. */
156 return 0;
157 }
cb7e2c1c
KA
158
159 while (avio_tell(ioc) < max_pos - 2 && amf_get_string(ioc, str_val, sizeof(str_val)) > 0) {
160 int64_t* current_array;
161
162 // Expect array object in context
163 if (avio_r8(ioc) != AMF_DATA_TYPE_ARRAY)
164 break;
165
166 arraylen = avio_rb32(ioc);
a246cefa
MN
167 if (arraylen >> 28)
168 break;
169
cb7e2c1c
KA
170 /*
171 * Expect only 'times' or 'filepositions' sub-arrays in other case refuse to use such metadata
172 * for indexing
173 */
174 if (!strcmp(KEYFRAMES_TIMESTAMP_TAG, str_val) && !times) {
175 if (!(times = av_mallocz(sizeof(*times) * arraylen))) {
176 ret = AVERROR(ENOMEM);
177 goto finish;
178 }
179 timeslen = arraylen;
180 current_array = times;
181 } else if (!strcmp(KEYFRAMES_BYTEOFFSET_TAG, str_val) && !filepositions) {
182 if (!(filepositions = av_mallocz(sizeof(*filepositions) * arraylen))) {
183 ret = AVERROR(ENOMEM);
184 goto finish;
185 }
186 fileposlen = arraylen;
187 current_array = filepositions;
188 } else // unexpected metatag inside keyframes, will not use such metadata for indexing
189 break;
190
191 for (i = 0; i < arraylen && avio_tell(ioc) < max_pos - 1; i++) {
192 if (avio_r8(ioc) != AMF_DATA_TYPE_NUMBER)
193 goto finish;
3383a53e 194 num_val = av_int2double(avio_rb64(ioc));
cb7e2c1c
KA
195 current_array[i] = num_val;
196 }
578d6861
MS
197 if (times && filepositions) {
198 // All done, exiting at a position allowing amf_parse_object
199 // to finish parsing the object
200 ret = 0;
201 break;
202 }
cb7e2c1c
KA
203 }
204
2b4e49d4
LA
205 if (!ret && timeslen == fileposlen)
206 for (i = 0; i < fileposlen; i++)
cb7e2c1c
KA
207 av_add_index_entry(vstream, filepositions[i], times[i]*1000, 0, 0, AVINDEX_KEYFRAME);
208 else
209 av_log(s, AV_LOG_WARNING, "Invalid keyframes object, skipping.\n");
210
211finish:
212 av_freep(&times);
213 av_freep(&filepositions);
578d6861
MS
214 // If we got unexpected data, but successfully reset back to
215 // the start pos, the caller can continue parsing
216 if (ret < 0 && avio_seek(ioc, initial_pos, SEEK_SET) > 0)
217 return 0;
cb7e2c1c
KA
218 return ret;
219}
220
4fe8a452 221static int amf_parse_object(AVFormatContext *s, AVStream *astream, AVStream *vstream, const char *key, int64_t max_pos, int depth) {
428cc588 222 AVCodecContext *acodec, *vcodec;
ae628ec1 223 AVIOContext *ioc;
428cc588 224 AMFDataType amf_type;
cc38e063 225 char str_val[256];
428cc588
AH
226 double num_val;
227
228 num_val = 0;
899681cd 229 ioc = s->pb;
428cc588 230
b7effd4e 231 amf_type = avio_r8(ioc);
428cc588
AH
232
233 switch(amf_type) {
234 case AMF_DATA_TYPE_NUMBER:
3383a53e 235 num_val = av_int2double(avio_rb64(ioc)); break;
428cc588 236 case AMF_DATA_TYPE_BOOL:
b7effd4e 237 num_val = avio_r8(ioc); break;
428cc588 238 case AMF_DATA_TYPE_STRING:
cc38e063 239 if(amf_get_string(ioc, str_val, sizeof(str_val)) < 0)
428cc588
AH
240 return -1;
241 break;
242 case AMF_DATA_TYPE_OBJECT: {
243 unsigned int keylen;
244
f4b51d06
RD
245 if ((vstream || astream) && key && !strcmp(KEYFRAMES_TAG, key) && depth == 1)
246 if (parse_keyframes_index(s, ioc, vstream ? vstream : astream,
247 max_pos) < 0)
cb7e2c1c
KA
248 return -1;
249
a2704c97 250 while(avio_tell(ioc) < max_pos - 2 && (keylen = avio_rb16(ioc))) {
45a8a02a 251 avio_skip(ioc, keylen); //skip key string
428cc588
AH
252 if(amf_parse_object(s, NULL, NULL, NULL, max_pos, depth + 1) < 0)
253 return -1; //if we couldn't skip, bomb out.
254 }
b7effd4e 255 if(avio_r8(ioc) != AMF_END_OF_OBJECT)
428cc588
AH
256 return -1;
257 }
258 break;
259 case AMF_DATA_TYPE_NULL:
260 case AMF_DATA_TYPE_UNDEFINED:
261 case AMF_DATA_TYPE_UNSUPPORTED:
262 break; //these take up no additional space
263 case AMF_DATA_TYPE_MIXEDARRAY:
45a8a02a 264 avio_skip(ioc, 4); //skip 32-bit max array index
a2704c97 265 while(avio_tell(ioc) < max_pos - 2 && amf_get_string(ioc, str_val, sizeof(str_val)) > 0) {
428cc588 266 //this is the only case in which we would want a nested parse to not skip over the object
cc38e063 267 if(amf_parse_object(s, astream, vstream, str_val, max_pos, depth + 1) < 0)
428cc588
AH
268 return -1;
269 }
b7effd4e 270 if(avio_r8(ioc) != AMF_END_OF_OBJECT)
428cc588
AH
271 return -1;
272 break;
273 case AMF_DATA_TYPE_ARRAY: {
274 unsigned int arraylen, i;
275
b7effd4e 276 arraylen = avio_rb32(ioc);
a2704c97 277 for(i = 0; i < arraylen && avio_tell(ioc) < max_pos - 1; i++) {
428cc588
AH
278 if(amf_parse_object(s, NULL, NULL, NULL, max_pos, depth + 1) < 0)
279 return -1; //if we couldn't skip, bomb out.
280 }
281 }
282 break;
283 case AMF_DATA_TYPE_DATE:
45a8a02a 284 avio_skip(ioc, 8 + 2); //timestamp (double) and UTC offset (int16)
428cc588
AH
285 break;
286 default: //unsupported type, we couldn't skip
287 return -1;
288 }
289
290 if(depth == 1 && key) { //only look for metadata values when we are not nested and key != NULL
291 acodec = astream ? astream->codec : NULL;
292 vcodec = vstream ? vstream->codec : NULL;
293
b204c46d
MS
294 if (amf_type == AMF_DATA_TYPE_NUMBER) {
295 if (!strcmp(key, "duration"))
296 s->duration = num_val * AV_TIME_BASE;
297 else if (!strcmp(key, "videodatarate") && vcodec && 0 <= (int)(num_val * 1024.0))
298 vcodec->bit_rate = num_val * 1024.0;
299 else if (!strcmp(key, "audiodatarate") && acodec && 0 <= (int)(num_val * 1024.0))
300 acodec->bit_rate = num_val * 1024.0;
301 }
302
5e87222f
MS
303 if (!strcmp(key, "duration") ||
304 !strcmp(key, "filesize") ||
305 !strcmp(key, "width") ||
306 !strcmp(key, "height") ||
307 !strcmp(key, "videodatarate") ||
308 !strcmp(key, "framerate") ||
309 !strcmp(key, "videocodecid") ||
310 !strcmp(key, "audiodatarate") ||
311 !strcmp(key, "audiosamplerate") ||
312 !strcmp(key, "audiosamplesize") ||
313 !strcmp(key, "stereo") ||
314 !strcmp(key, "audiocodecid"))
315 return 0;
316
428cc588 317 if(amf_type == AMF_DATA_TYPE_BOOL) {
cc38e063 318 av_strlcpy(str_val, num_val > 0 ? "true" : "false", sizeof(str_val));
d2d67e42 319 av_dict_set(&s->metadata, key, str_val, 0);
428cc588 320 } else if(amf_type == AMF_DATA_TYPE_NUMBER) {
cc38e063 321 snprintf(str_val, sizeof(str_val), "%.f", num_val);
d2d67e42 322 av_dict_set(&s->metadata, key, str_val, 0);
df2bd71a 323 } else if (amf_type == AMF_DATA_TYPE_STRING)
d2d67e42 324 av_dict_set(&s->metadata, key, str_val, 0);
428cc588
AH
325 }
326
327 return 0;
328}
329
4fe8a452 330static int flv_read_metabody(AVFormatContext *s, int64_t next_pos) {
428cc588
AH
331 AMFDataType type;
332 AVStream *stream, *astream, *vstream;
ae628ec1 333 AVIOContext *ioc;
4eec2606 334 int i;
cc38e063 335 char buffer[11]; //only needs to hold the string "onMetaData". Anything longer is something we don't want.
428cc588
AH
336
337 astream = NULL;
338 vstream = NULL;
899681cd 339 ioc = s->pb;
428cc588
AH
340
341 //first object needs to be "onMetaData" string
b7effd4e 342 type = avio_r8(ioc);
cc38e063 343 if(type != AMF_DATA_TYPE_STRING || amf_get_string(ioc, buffer, sizeof(buffer)) < 0 || strcmp(buffer, "onMetaData"))
428cc588
AH
344 return -1;
345
346 //find the streams now so that amf_parse_object doesn't need to do the lookup every time it is called.
347 for(i = 0; i < s->nb_streams; i++) {
348 stream = s->streams[i];
72415b2a
SS
349 if (stream->codec->codec_type == AVMEDIA_TYPE_AUDIO) astream = stream;
350 else if(stream->codec->codec_type == AVMEDIA_TYPE_VIDEO) vstream = stream;
428cc588
AH
351 }
352
353 //parse the second object (we want a mixed array)
cc38e063 354 if(amf_parse_object(s, astream, vstream, buffer, next_pos, 0) < 0)
428cc588
AH
355 return -1;
356
357 return 0;
358}
359
6f910bcf 360static AVStream *create_stream(AVFormatContext *s, int is_audio){
84ad31ff 361 AVStream *st = avformat_new_stream(s, NULL);
6f910bcf
MN
362 if (!st)
363 return NULL;
84ad31ff 364 st->id = is_audio;
72415b2a 365 st->codec->codec_type = is_audio ? AVMEDIA_TYPE_AUDIO : AVMEDIA_TYPE_VIDEO;
c3f9ebf7 366 avpriv_set_pts_info(st, 32, 1, 1000); /* 32 bit pts in ms */
6f910bcf
MN
367 return st;
368}
369
d4f5d74a
GM
370static int flv_read_header(AVFormatContext *s,
371 AVFormatParameters *ap)
372{
15f14fc7 373 int offset, flags;
d4f5d74a 374
45a8a02a 375 avio_skip(s->pb, 4);
b7effd4e 376 flags = avio_r8(s->pb);
031311cb
AB
377 /* old flvtool cleared this field */
378 /* FIXME: better fix needed */
379 if (!flags) {
380 flags = FLV_HEADER_FLAG_HASVIDEO | FLV_HEADER_FLAG_HASAUDIO;
381 av_log(s, AV_LOG_WARNING, "Broken FLV file, which says no streams present, this might fail\n");
382 }
d4f5d74a 383
b41497e9
MN
384 if((flags & (FLV_HEADER_FLAG_HASVIDEO|FLV_HEADER_FLAG_HASAUDIO))
385 != (FLV_HEADER_FLAG_HASVIDEO|FLV_HEADER_FLAG_HASAUDIO))
386 s->ctx_flags |= AVFMTCTX_NOHEADER;
387
4eb0c665 388 if(flags & FLV_HEADER_FLAG_HASVIDEO){
6f910bcf 389 if(!create_stream(s, 0))
769e10f0 390 return AVERROR(ENOMEM);
4eb0c665
MN
391 }
392 if(flags & FLV_HEADER_FLAG_HASAUDIO){
6f910bcf 393 if(!create_stream(s, 1))
769e10f0 394 return AVERROR(ENOMEM);
4eb0c665
MN
395 }
396
b7effd4e 397 offset = avio_rb32(s->pb);
6b4aa5da 398 avio_seek(s->pb, offset, SEEK_SET);
45a8a02a 399 avio_skip(s->pb, 4);
d4f5d74a 400
aeb20f7f
N
401 s->start_time = 0;
402
d4f5d74a
GM
403 return 0;
404}
405
251f320f
MS
406static int flv_read_close(AVFormatContext *s)
407{
408 FLVContext *flv = s->priv_data;
409 av_freep(&flv->new_extradata[0]);
410 av_freep(&flv->new_extradata[1]);
411 return 0;
412}
413
04fd3e81
BC
414static int flv_get_extradata(AVFormatContext *s, AVStream *st, int size)
415{
416 av_free(st->codec->extradata);
417 st->codec->extradata = av_mallocz(size + FF_INPUT_BUFFER_PADDING_SIZE);
418 if (!st->codec->extradata)
419 return AVERROR(ENOMEM);
420 st->codec->extradata_size = size;
b7effd4e 421 avio_read(s->pb, st->codec->extradata, st->codec->extradata_size);
04fd3e81
BC
422 return 0;
423}
424
251f320f
MS
425static int flv_queue_extradata(FLVContext *flv, AVIOContext *pb, int stream,
426 int size)
427{
428 av_free(flv->new_extradata[stream]);
429 flv->new_extradata[stream] = av_mallocz(size + FF_INPUT_BUFFER_PADDING_SIZE);
430 if (!flv->new_extradata[stream])
431 return AVERROR(ENOMEM);
432 flv->new_extradata_size[stream] = size;
433 avio_read(pb, flv->new_extradata[stream], size);
434 return 0;
435}
436
d4f5d74a
GM
437static int flv_read_packet(AVFormatContext *s, AVPacket *pkt)
438{
ebd61055 439 FLVContext *flv = s->priv_data;
4fe8a452
PM
440 int ret, i, type, size, flags, is_audio;
441 int64_t next, pos;
ebd61055 442 int64_t dts, pts = AV_NOPTS_VALUE;
923bd441 443 AVStream *st = NULL;
115329f1 444
45a8a02a 445 for(;;avio_skip(s->pb, 4)){ /* pkt size is repeated at end. skip it */
a2704c97 446 pos = avio_tell(s->pb);
b7effd4e
AK
447 type = avio_r8(s->pb);
448 size = avio_rb24(s->pb);
449 dts = avio_rb24(s->pb);
450 dts |= avio_r8(s->pb) << 24;
13220b18 451 av_dlog(s, "type:%d, size:%d, dts:%"PRId64"\n", type, size, dts);
66e5b1df 452 if (s->pb->eof_reached)
0e9602ef 453 return AVERROR_EOF;
45a8a02a 454 avio_skip(s->pb, 3); /* stream id, always 0 */
d4f5d74a 455 flags = 0;
115329f1 456
068f2a22
MN
457 if(size == 0)
458 continue;
115329f1 459
a2704c97 460 next= size + avio_tell(s->pb);
dd9f5916 461
6cac3a3b 462 if (type == FLV_TAG_TYPE_AUDIO) {
068f2a22 463 is_audio=1;
b7effd4e 464 flags = avio_r8(s->pb);
6298eb81 465 size--;
6cac3a3b 466 } else if (type == FLV_TAG_TYPE_VIDEO) {
068f2a22 467 is_audio=0;
b7effd4e 468 flags = avio_r8(s->pb);
6298eb81 469 size--;
3d9aecb0
BC
470 if ((flags & 0xf0) == 0x50) /* video info / command frame */
471 goto skip;
d4f5d74a 472 } else {
09e54e1f 473 if (type == FLV_TAG_TYPE_META && size > 13+1+4)
428cc588
AH
474 flv_read_metabody(s, next);
475 else /* skip packet */
e1d8d7bb 476 av_log(s, AV_LOG_DEBUG, "skipping flv packet: type %d, size %d, flags %d\n", type, size, flags);
3d9aecb0 477 skip:
6b4aa5da 478 avio_seek(s->pb, next, SEEK_SET);
ded01499 479 continue;
d4f5d74a
GM
480 }
481
ae58b54b
BC
482 /* skip empty data packets */
483 if (!size)
484 continue;
485
d4f5d74a
GM
486 /* now find stream */
487 for(i=0;i<s->nb_streams;i++) {
488 st = s->streams[i];
068f2a22
MN
489 if (st->id == is_audio)
490 break;
d4f5d74a 491 }
068f2a22 492 if(i == s->nb_streams){
c1023470 493 av_log(s, AV_LOG_ERROR, "invalid stream\n");
c8652b57 494 st= create_stream(s, is_audio);
a33cfa30 495 s->ctx_flags &= ~AVFMTCTX_NOHEADER;
6ed08157 496 }
13220b18 497 av_dlog(s, "%d %X %d \n", is_audio, flags, st->discard);
6cac3a3b
AH
498 if( (st->discard >= AVDISCARD_NONKEY && !((flags & FLV_VIDEO_FRAMETYPE_MASK) == FLV_FRAME_KEY || is_audio))
499 ||(st->discard >= AVDISCARD_BIDIR && ((flags & FLV_VIDEO_FRAMETYPE_MASK) == FLV_FRAME_DISP_INTER && !is_audio))
f3356e9c
MN
500 || st->discard >= AVDISCARD_ALL
501 ){
6b4aa5da 502 avio_seek(s->pb, next, SEEK_SET);
ded01499 503 continue;
b9866ebc 504 }
6cac3a3b 505 if ((flags & FLV_VIDEO_FRAMETYPE_MASK) == FLV_FRAME_KEY)
7ef94d22 506 av_add_index_entry(st, pos, dts, size, 0, AVINDEX_KEYFRAME);
068f2a22
MN
507 break;
508 }
509
15f14fc7 510 // if not streamed and no duration from metadata then seek to end to find the duration from the timestamps
8978feda 511 if(s->pb->seekable && (!s->duration || s->duration==AV_NOPTS_VALUE)){
15f14fc7 512 int size;
a2704c97 513 const int64_t pos= avio_tell(s->pb);
76aa876e 514 const int64_t fsize= avio_size(s->pb);
6b4aa5da 515 avio_seek(s->pb, fsize-4, SEEK_SET);
b7effd4e 516 size= avio_rb32(s->pb);
6b4aa5da 517 avio_seek(s->pb, fsize-3-size, SEEK_SET);
b7effd4e
AK
518 if(size == avio_rb24(s->pb) + 11){
519 uint32_t ts = avio_rb24(s->pb);
520 ts |= avio_r8(s->pb) << 24;
b126dee9 521 s->duration = ts * (int64_t)AV_TIME_BASE / 1000;
15f14fc7 522 }
6b4aa5da 523 avio_seek(s->pb, pos, SEEK_SET);
15f14fc7
MN
524 }
525
068f2a22 526 if(is_audio){
2f3d7ea9 527 if(!st->codec->channels || !st->codec->sample_rate || !st->codec->bits_per_coded_sample) {
6cac3a3b 528 st->codec->channels = (flags & FLV_AUDIO_CHANNEL_MASK) == FLV_STEREO ? 2 : 1;
7f8cd075 529 st->codec->sample_rate = (44100 << ((flags & FLV_AUDIO_SAMPLERATE_MASK) >> FLV_AUDIO_SAMPLERATE_OFFSET) >> 3);
dd1c8f3e 530 st->codec->bits_per_coded_sample = (flags & FLV_AUDIO_SAMPLESIZE_MASK) ? 16 : 8;
2f3d7ea9
MN
531 }
532 if(!st->codec->codec_id){
428cc588 533 flv_set_audio_codec(s, st, flags & FLV_AUDIO_CODECID_MASK);
068f2a22
MN
534 }
535 }else{
428cc588 536 size -= flv_set_video_codec(s, st, flags & FLV_VIDEO_CODECID_MASK);
bb01a3f0
MN
537 }
538
04fd3e81
BC
539 if (st->codec->codec_id == CODEC_ID_AAC ||
540 st->codec->codec_id == CODEC_ID_H264) {
b7effd4e 541 int type = avio_r8(s->pb);
04fd3e81
BC
542 size--;
543 if (st->codec->codec_id == CODEC_ID_H264) {
b7effd4e 544 int32_t cts = (avio_rb24(s->pb)+0xff800000)^0xff800000; // sign extension
ebd61055
BC
545 pts = dts + cts;
546 if (cts < 0) { // dts are wrong
547 flv->wrong_dts = 1;
548 av_log(s, AV_LOG_WARNING, "negative cts, previous timestamps might be wrong\n");
549 }
550 if (flv->wrong_dts)
551 dts = AV_NOPTS_VALUE;
04fd3e81
BC
552 }
553 if (type == 0) {
251f320f
MS
554 if (st->codec->extradata) {
555 if ((ret = flv_queue_extradata(flv, s->pb, is_audio, size)) < 0)
556 return ret;
557 ret = AVERROR(EAGAIN);
558 goto leave;
559 }
6298eb81 560 if ((ret = flv_get_extradata(s, st, size)) < 0)
04fd3e81 561 return ret;
d2718187
BC
562 if (st->codec->codec_id == CODEC_ID_AAC) {
563 MPEG4AudioConfig cfg;
59a9a235 564 avpriv_mpeg4audio_get_config(&cfg, st->codec->extradata,
fd095539 565 st->codec->extradata_size * 8, 1);
5aea268d 566 st->codec->channels = cfg.channels;
7d6096e4
BC
567 if (cfg.ext_sample_rate)
568 st->codec->sample_rate = cfg.ext_sample_rate;
569 else
570 st->codec->sample_rate = cfg.sample_rate;
dfd2a005 571 av_dlog(s, "mp4a config channels %d sample rate %d\n",
d2718187
BC
572 st->codec->channels, st->codec->sample_rate);
573 }
574
527c2e64
HC
575 ret = AVERROR(EAGAIN);
576 goto leave;
04fd3e81
BC
577 }
578 }
579
fcb4228c 580 /* skip empty data packets */
527c2e64
HC
581 if (!size) {
582 ret = AVERROR(EAGAIN);
583 goto leave;
584 }
fcb4228c 585
6298eb81 586 ret= av_get_packet(s->pb, pkt, size);
634b927f 587 if (ret < 0) {
6f3e0b21 588 return AVERROR(EIO);
d4f5d74a
GM
589 }
590 /* note: we need to modify the packet size here to handle the last
591 packet */
592 pkt->size = ret;
7ef94d22 593 pkt->dts = dts;
ebd61055 594 pkt->pts = pts == AV_NOPTS_VALUE ? dts : pts;
d4f5d74a 595 pkt->stream_index = st->index;
251f320f
MS
596 if (flv->new_extradata[is_audio]) {
597 uint8_t *side = av_packet_new_side_data(pkt, AV_PKT_DATA_NEW_EXTRADATA,
598 flv->new_extradata_size[is_audio]);
599 if (side) {
600 memcpy(side, flv->new_extradata[is_audio],
601 flv->new_extradata_size[is_audio]);
602 av_freep(&flv->new_extradata[is_audio]);
603 flv->new_extradata_size[is_audio] = 0;
604 }
605 }
115329f1 606
6cac3a3b 607 if (is_audio || ((flags & FLV_VIDEO_FRAMETYPE_MASK) == FLV_FRAME_KEY))
cc947f04 608 pkt->flags |= AV_PKT_FLAG_KEY;
115329f1 609
527c2e64 610leave:
45a8a02a 611 avio_skip(s->pb, 4);
d4f5d74a
GM
612 return ret;
613}
614
fc8fa007
HC
615static int flv_read_seek(AVFormatContext *s, int stream_index,
616 int64_t ts, int flags)
617{
ff1ec0c3 618 return avio_seek_time(s->pb, stream_index, ts, flags);
fc8fa007
HC
619}
620
621#if 0 /* don't know enough to implement this */
622static int flv_read_seek2(AVFormatContext *s, int stream_index,
623 int64_t min_ts, int64_t ts, int64_t max_ts, int flags)
624{
625 int ret = AVERROR(ENOSYS);
626
627 if (ts - min_ts > (uint64_t)(max_ts - ts)) flags |= AVSEEK_FLAG_BACKWARD;
628
8978feda 629 if (!s->pb->seekable) {
fc8fa007
HC
630 if (stream_index < 0) {
631 stream_index = av_find_default_stream_index(s);
632 if (stream_index < 0)
633 return -1;
634
635 /* timestamp for default must be expressed in AV_TIME_BASE units */
636 ts = av_rescale_rnd(ts, 1000, AV_TIME_BASE,
637 flags & AVSEEK_FLAG_BACKWARD ? AV_ROUND_DOWN : AV_ROUND_UP);
638 }
ff1ec0c3 639 ret = avio_seek_time(s->pb, stream_index, ts, flags);
fc8fa007
HC
640 }
641
642 if (ret == AVERROR(ENOSYS))
643 ret = av_seek_frame(s, stream_index, ts, flags);
644 return ret;
645}
646#endif
647
c6610a21 648AVInputFormat ff_flv_demuxer = {
dfc2c4d9
AK
649 .name = "flv",
650 .long_name = NULL_IF_CONFIG_SMALL("FLV format"),
651 .priv_data_size = sizeof(FLVContext),
652 .read_probe = flv_probe,
653 .read_header = flv_read_header,
654 .read_packet = flv_read_packet,
fc8fa007
HC
655 .read_seek = flv_read_seek,
656#if 0
657 .read_seek2 = flv_read_seek2,
658#endif
251f320f 659 .read_close = flv_read_close,
d4f5d74a
GM
660 .extensions = "flv",
661 .value = CODEC_ID_FLV1,
662};