rtsp: Handle requests from server to client
[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];
2215c39e
MS
46 int last_sample_rate;
47 int last_channels;
ebd61055
BC
48} FLVContext;
49
d4f5d74a
GM
50static int flv_probe(AVProbeData *p)
51{
52 const uint8_t *d;
53
d4f5d74a 54 d = p->buf;
37e34df5 55 if (d[0] == 'F' && d[1] == 'L' && d[2] == 'V' && d[3] < 5 && d[5]==0 && AV_RB32(d+5)>8) {
74248229 56 return AVPROBE_SCORE_MAX;
d4f5d74a
GM
57 }
58 return 0;
59}
60
2215c39e 61static void flv_set_audio_codec(AVFormatContext *s, AVStream *astream, AVCodecContext *acodec, int flv_codecid) {
428cc588
AH
62 switch(flv_codecid) {
63 //no distinction between S16 and S8 PCM codec flags
44de39f9 64 case FLV_CODECID_PCM:
8e9efe43 65 acodec->codec_id = acodec->bits_per_coded_sample == 8 ? CODEC_ID_PCM_U8 :
63613fe6 66#if HAVE_BIGENDIAN
58293e57
MN
67 CODEC_ID_PCM_S16BE;
68#else
69 CODEC_ID_PCM_S16LE;
70#endif
71 break;
428cc588 72 case FLV_CODECID_PCM_LE:
8e9efe43 73 acodec->codec_id = acodec->bits_per_coded_sample == 8 ? CODEC_ID_PCM_U8 : CODEC_ID_PCM_S16LE; break;
04fd3e81 74 case FLV_CODECID_AAC : acodec->codec_id = CODEC_ID_AAC; break;
428cc588 75 case FLV_CODECID_ADPCM: acodec->codec_id = CODEC_ID_ADPCM_SWF; break;
f96d0eef
BC
76 case FLV_CODECID_SPEEX:
77 acodec->codec_id = CODEC_ID_SPEEX;
78 acodec->sample_rate = 16000;
79 break;
57004ff1 80 case FLV_CODECID_MP3 : acodec->codec_id = CODEC_ID_MP3 ; astream->need_parsing = AVSTREAM_PARSE_FULL; break;
88cb61bb 81 case FLV_CODECID_NELLYMOSER_8KHZ_MONO:
428cc588 82 acodec->sample_rate = 8000; //in case metadata does not otherwise declare samplerate
caa7ad5d
TF
83 acodec->codec_id = CODEC_ID_NELLYMOSER;
84 break;
85 case FLV_CODECID_NELLYMOSER_16KHZ_MONO:
86 acodec->sample_rate = 16000;
87 acodec->codec_id = CODEC_ID_NELLYMOSER;
88 break;
428cc588 89 case FLV_CODECID_NELLYMOSER:
636b13c5
BL
90 acodec->codec_id = CODEC_ID_NELLYMOSER;
91 break;
428cc588
AH
92 default:
93 av_log(s, AV_LOG_INFO, "Unsupported audio codec (%x)\n", flv_codecid >> FLV_AUDIO_CODECID_OFFSET);
94 acodec->codec_tag = flv_codecid >> FLV_AUDIO_CODECID_OFFSET;
95 }
96}
97
98static int flv_set_video_codec(AVFormatContext *s, AVStream *vstream, int flv_codecid) {
99 AVCodecContext *vcodec = vstream->codec;
100 switch(flv_codecid) {
101 case FLV_CODECID_H263 : vcodec->codec_id = CODEC_ID_FLV1 ; break;
102 case FLV_CODECID_SCREEN: vcodec->codec_id = CODEC_ID_FLASHSV; break;
0aa6a518 103 case FLV_CODECID_SCREEN2: vcodec->codec_id = CODEC_ID_FLASHSV2; break;
428cc588 104 case FLV_CODECID_VP6 : vcodec->codec_id = CODEC_ID_VP6F ;
99904603
AJ
105 case FLV_CODECID_VP6A :
106 if(flv_codecid == FLV_CODECID_VP6A)
107 vcodec->codec_id = CODEC_ID_VP6A;
428cc588
AH
108 if(vcodec->extradata_size != 1) {
109 vcodec->extradata_size = 1;
110 vcodec->extradata = av_malloc(1);
111 }
b7effd4e 112 vcodec->extradata[0] = avio_r8(s->pb);
428cc588 113 return 1; // 1 byte body size adjustment for flv_read_packet()
04fd3e81
BC
114 case FLV_CODECID_H264:
115 vcodec->codec_id = CODEC_ID_H264;
116 return 3; // not 4, reading packet type will consume one byte
428cc588
AH
117 default:
118 av_log(s, AV_LOG_INFO, "Unsupported video codec (%x)\n", flv_codecid);
119 vcodec->codec_tag = flv_codecid;
120 }
121
122 return 0;
123}
124
ae628ec1 125static int amf_get_string(AVIOContext *ioc, char *buffer, int buffsize) {
b7effd4e 126 int length = avio_rb16(ioc);
cc38e063 127 if(length >= buffsize) {
45a8a02a 128 avio_skip(ioc, length);
cc38e063
MN
129 return -1;
130 }
896bcd2e 131
b7effd4e 132 avio_read(ioc, buffer, length);
896bcd2e 133
cc38e063 134 buffer[length] = '\0';
896bcd2e 135
cc38e063 136 return length;
896bcd2e
MN
137}
138
cb7e2c1c
KA
139static int parse_keyframes_index(AVFormatContext *s, AVIOContext *ioc, AVStream *vstream, int64_t max_pos) {
140 unsigned int arraylen = 0, timeslen = 0, fileposlen = 0, i;
141 double num_val;
142 char str_val[256];
143 int64_t *times = NULL;
144 int64_t *filepositions = NULL;
578d6861 145 int ret = AVERROR(ENOSYS);
b5304f7b 146 int64_t initial_pos = avio_tell(ioc);
bafff166
MS
147 AVDictionaryEntry *creator = av_dict_get(s->metadata, "metadatacreator",
148 NULL, 0);
149
150 if (creator && !strcmp(creator->value, "MEGA")) {
151 /* Files with this metadatacreator tag seem to have filepositions
152 * pointing at the 4 trailer bytes of the previous packet,
153 * which isn't the norm (nor what we expect here, nor what
154 * jwplayer + lighttpd expect, nor what flvtool2 produces).
155 * Just ignore the index in this case, instead of risking trying
156 * to adjust it to something that might or might not work. */
157 return 0;
158 }
cb7e2c1c 159
b70f04c2
MS
160 if (s->flags & AVFMT_FLAG_IGNIDX)
161 return 0;
162
cb7e2c1c
KA
163 while (avio_tell(ioc) < max_pos - 2 && amf_get_string(ioc, str_val, sizeof(str_val)) > 0) {
164 int64_t* current_array;
165
166 // Expect array object in context
167 if (avio_r8(ioc) != AMF_DATA_TYPE_ARRAY)
168 break;
169
170 arraylen = avio_rb32(ioc);
a246cefa
MN
171 if (arraylen >> 28)
172 break;
173
cb7e2c1c
KA
174 /*
175 * Expect only 'times' or 'filepositions' sub-arrays in other case refuse to use such metadata
176 * for indexing
177 */
178 if (!strcmp(KEYFRAMES_TIMESTAMP_TAG, str_val) && !times) {
179 if (!(times = av_mallocz(sizeof(*times) * arraylen))) {
180 ret = AVERROR(ENOMEM);
181 goto finish;
182 }
183 timeslen = arraylen;
184 current_array = times;
185 } else if (!strcmp(KEYFRAMES_BYTEOFFSET_TAG, str_val) && !filepositions) {
186 if (!(filepositions = av_mallocz(sizeof(*filepositions) * arraylen))) {
187 ret = AVERROR(ENOMEM);
188 goto finish;
189 }
190 fileposlen = arraylen;
191 current_array = filepositions;
192 } else // unexpected metatag inside keyframes, will not use such metadata for indexing
193 break;
194
195 for (i = 0; i < arraylen && avio_tell(ioc) < max_pos - 1; i++) {
196 if (avio_r8(ioc) != AMF_DATA_TYPE_NUMBER)
197 goto finish;
3383a53e 198 num_val = av_int2double(avio_rb64(ioc));
cb7e2c1c
KA
199 current_array[i] = num_val;
200 }
578d6861
MS
201 if (times && filepositions) {
202 // All done, exiting at a position allowing amf_parse_object
203 // to finish parsing the object
204 ret = 0;
205 break;
206 }
cb7e2c1c
KA
207 }
208
2b4e49d4 209 if (!ret && timeslen == fileposlen)
0a7ce3ca
MS
210 for (i = 0; i < fileposlen; i++)
211 av_add_index_entry(vstream, filepositions[i], times[i]*1000,
212 0, 0, AVINDEX_KEYFRAME);
cb7e2c1c
KA
213 else
214 av_log(s, AV_LOG_WARNING, "Invalid keyframes object, skipping.\n");
215
216finish:
217 av_freep(&times);
218 av_freep(&filepositions);
578d6861
MS
219 // If we got unexpected data, but successfully reset back to
220 // the start pos, the caller can continue parsing
221 if (ret < 0 && avio_seek(ioc, initial_pos, SEEK_SET) > 0)
222 return 0;
cb7e2c1c
KA
223 return ret;
224}
225
4fe8a452 226static int amf_parse_object(AVFormatContext *s, AVStream *astream, AVStream *vstream, const char *key, int64_t max_pos, int depth) {
428cc588 227 AVCodecContext *acodec, *vcodec;
ae628ec1 228 AVIOContext *ioc;
428cc588 229 AMFDataType amf_type;
cc38e063 230 char str_val[256];
428cc588
AH
231 double num_val;
232
233 num_val = 0;
899681cd 234 ioc = s->pb;
428cc588 235
b7effd4e 236 amf_type = avio_r8(ioc);
428cc588
AH
237
238 switch(amf_type) {
239 case AMF_DATA_TYPE_NUMBER:
3383a53e 240 num_val = av_int2double(avio_rb64(ioc)); break;
428cc588 241 case AMF_DATA_TYPE_BOOL:
b7effd4e 242 num_val = avio_r8(ioc); break;
428cc588 243 case AMF_DATA_TYPE_STRING:
cc38e063 244 if(amf_get_string(ioc, str_val, sizeof(str_val)) < 0)
428cc588
AH
245 return -1;
246 break;
89f6e8a2 247 case AMF_DATA_TYPE_OBJECT:
f4b51d06
RD
248 if ((vstream || astream) && key && !strcmp(KEYFRAMES_TAG, key) && depth == 1)
249 if (parse_keyframes_index(s, ioc, vstream ? vstream : astream,
250 max_pos) < 0)
cb7e2c1c
KA
251 return -1;
252
89f6e8a2
MS
253 while (avio_tell(ioc) < max_pos - 2 && amf_get_string(ioc, str_val, sizeof(str_val)) > 0) {
254 if (amf_parse_object(s, astream, vstream, str_val, max_pos, depth + 1) < 0)
428cc588
AH
255 return -1; //if we couldn't skip, bomb out.
256 }
b7effd4e 257 if(avio_r8(ioc) != AMF_END_OF_OBJECT)
428cc588 258 return -1;
428cc588
AH
259 break;
260 case AMF_DATA_TYPE_NULL:
261 case AMF_DATA_TYPE_UNDEFINED:
262 case AMF_DATA_TYPE_UNSUPPORTED:
263 break; //these take up no additional space
264 case AMF_DATA_TYPE_MIXEDARRAY:
45a8a02a 265 avio_skip(ioc, 4); //skip 32-bit max array index
a2704c97 266 while(avio_tell(ioc) < max_pos - 2 && amf_get_string(ioc, str_val, sizeof(str_val)) > 0) {
428cc588 267 //this is the only case in which we would want a nested parse to not skip over the object
cc38e063 268 if(amf_parse_object(s, astream, vstream, str_val, max_pos, depth + 1) < 0)
428cc588
AH
269 return -1;
270 }
b7effd4e 271 if(avio_r8(ioc) != AMF_END_OF_OBJECT)
428cc588
AH
272 return -1;
273 break;
274 case AMF_DATA_TYPE_ARRAY: {
275 unsigned int arraylen, i;
276
b7effd4e 277 arraylen = avio_rb32(ioc);
a2704c97 278 for(i = 0; i < arraylen && avio_tell(ioc) < max_pos - 1; i++) {
428cc588
AH
279 if(amf_parse_object(s, NULL, NULL, NULL, max_pos, depth + 1) < 0)
280 return -1; //if we couldn't skip, bomb out.
281 }
282 }
283 break;
284 case AMF_DATA_TYPE_DATE:
45a8a02a 285 avio_skip(ioc, 8 + 2); //timestamp (double) and UTC offset (int16)
428cc588
AH
286 break;
287 default: //unsupported type, we couldn't skip
288 return -1;
289 }
290
291 if(depth == 1 && key) { //only look for metadata values when we are not nested and key != NULL
292 acodec = astream ? astream->codec : NULL;
293 vcodec = vstream ? vstream->codec : NULL;
294
b204c46d
MS
295 if (amf_type == AMF_DATA_TYPE_NUMBER) {
296 if (!strcmp(key, "duration"))
297 s->duration = num_val * AV_TIME_BASE;
298 else if (!strcmp(key, "videodatarate") && vcodec && 0 <= (int)(num_val * 1024.0))
299 vcodec->bit_rate = num_val * 1024.0;
300 else if (!strcmp(key, "audiodatarate") && acodec && 0 <= (int)(num_val * 1024.0))
301 acodec->bit_rate = num_val * 1024.0;
302 }
303
5e87222f
MS
304 if (!strcmp(key, "duration") ||
305 !strcmp(key, "filesize") ||
306 !strcmp(key, "width") ||
307 !strcmp(key, "height") ||
308 !strcmp(key, "videodatarate") ||
309 !strcmp(key, "framerate") ||
310 !strcmp(key, "videocodecid") ||
311 !strcmp(key, "audiodatarate") ||
312 !strcmp(key, "audiosamplerate") ||
313 !strcmp(key, "audiosamplesize") ||
314 !strcmp(key, "stereo") ||
315 !strcmp(key, "audiocodecid"))
316 return 0;
317
428cc588 318 if(amf_type == AMF_DATA_TYPE_BOOL) {
cc38e063 319 av_strlcpy(str_val, num_val > 0 ? "true" : "false", sizeof(str_val));
d2d67e42 320 av_dict_set(&s->metadata, key, str_val, 0);
428cc588 321 } else if(amf_type == AMF_DATA_TYPE_NUMBER) {
cc38e063 322 snprintf(str_val, sizeof(str_val), "%.f", num_val);
d2d67e42 323 av_dict_set(&s->metadata, key, str_val, 0);
df2bd71a 324 } else if (amf_type == AMF_DATA_TYPE_STRING)
d2d67e42 325 av_dict_set(&s->metadata, key, str_val, 0);
428cc588
AH
326 }
327
328 return 0;
329}
330
4fe8a452 331static int flv_read_metabody(AVFormatContext *s, int64_t next_pos) {
428cc588
AH
332 AMFDataType type;
333 AVStream *stream, *astream, *vstream;
ae628ec1 334 AVIOContext *ioc;
4eec2606 335 int i;
cc38e063 336 char buffer[11]; //only needs to hold the string "onMetaData". Anything longer is something we don't want.
428cc588
AH
337
338 astream = NULL;
339 vstream = NULL;
899681cd 340 ioc = s->pb;
428cc588
AH
341
342 //first object needs to be "onMetaData" string
b7effd4e 343 type = avio_r8(ioc);
cc38e063 344 if(type != AMF_DATA_TYPE_STRING || amf_get_string(ioc, buffer, sizeof(buffer)) < 0 || strcmp(buffer, "onMetaData"))
428cc588
AH
345 return -1;
346
347 //find the streams now so that amf_parse_object doesn't need to do the lookup every time it is called.
348 for(i = 0; i < s->nb_streams; i++) {
349 stream = s->streams[i];
72415b2a
SS
350 if (stream->codec->codec_type == AVMEDIA_TYPE_AUDIO) astream = stream;
351 else if(stream->codec->codec_type == AVMEDIA_TYPE_VIDEO) vstream = stream;
428cc588
AH
352 }
353
354 //parse the second object (we want a mixed array)
cc38e063 355 if(amf_parse_object(s, astream, vstream, buffer, next_pos, 0) < 0)
428cc588
AH
356 return -1;
357
358 return 0;
359}
360
6f910bcf 361static AVStream *create_stream(AVFormatContext *s, int is_audio){
84ad31ff 362 AVStream *st = avformat_new_stream(s, NULL);
6f910bcf
MN
363 if (!st)
364 return NULL;
84ad31ff 365 st->id = is_audio;
72415b2a 366 st->codec->codec_type = is_audio ? AVMEDIA_TYPE_AUDIO : AVMEDIA_TYPE_VIDEO;
c3f9ebf7 367 avpriv_set_pts_info(st, 32, 1, 1000); /* 32 bit pts in ms */
6f910bcf
MN
368 return st;
369}
370
6e9651d1 371static int flv_read_header(AVFormatContext *s)
d4f5d74a 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;
2df73eef 443 int sample_rate = 0, channels = 0;
923bd441 444 AVStream *st = NULL;
115329f1 445
45a8a02a 446 for(;;avio_skip(s->pb, 4)){ /* pkt size is repeated at end. skip it */
a2704c97 447 pos = avio_tell(s->pb);
b7effd4e
AK
448 type = avio_r8(s->pb);
449 size = avio_rb24(s->pb);
450 dts = avio_rb24(s->pb);
451 dts |= avio_r8(s->pb) << 24;
13220b18 452 av_dlog(s, "type:%d, size:%d, dts:%"PRId64"\n", type, size, dts);
66e5b1df 453 if (s->pb->eof_reached)
0e9602ef 454 return AVERROR_EOF;
45a8a02a 455 avio_skip(s->pb, 3); /* stream id, always 0 */
d4f5d74a 456 flags = 0;
115329f1 457
068f2a22
MN
458 if(size == 0)
459 continue;
115329f1 460
a2704c97 461 next= size + avio_tell(s->pb);
dd9f5916 462
6cac3a3b 463 if (type == FLV_TAG_TYPE_AUDIO) {
068f2a22 464 is_audio=1;
b7effd4e 465 flags = avio_r8(s->pb);
6298eb81 466 size--;
6cac3a3b 467 } else if (type == FLV_TAG_TYPE_VIDEO) {
068f2a22 468 is_audio=0;
b7effd4e 469 flags = avio_r8(s->pb);
6298eb81 470 size--;
3d9aecb0
BC
471 if ((flags & 0xf0) == 0x50) /* video info / command frame */
472 goto skip;
d4f5d74a 473 } else {
09e54e1f 474 if (type == FLV_TAG_TYPE_META && size > 13+1+4)
428cc588
AH
475 flv_read_metabody(s, next);
476 else /* skip packet */
e1d8d7bb 477 av_log(s, AV_LOG_DEBUG, "skipping flv packet: type %d, size %d, flags %d\n", type, size, flags);
3d9aecb0 478 skip:
6b4aa5da 479 avio_seek(s->pb, next, SEEK_SET);
ded01499 480 continue;
d4f5d74a
GM
481 }
482
ae58b54b
BC
483 /* skip empty data packets */
484 if (!size)
485 continue;
486
d4f5d74a
GM
487 /* now find stream */
488 for(i=0;i<s->nb_streams;i++) {
489 st = s->streams[i];
068f2a22
MN
490 if (st->id == is_audio)
491 break;
d4f5d74a 492 }
068f2a22 493 if(i == s->nb_streams){
c1023470 494 av_log(s, AV_LOG_ERROR, "invalid stream\n");
c8652b57 495 st= create_stream(s, is_audio);
a33cfa30 496 s->ctx_flags &= ~AVFMTCTX_NOHEADER;
6ed08157 497 }
13220b18 498 av_dlog(s, "%d %X %d \n", is_audio, flags, st->discard);
6cac3a3b
AH
499 if( (st->discard >= AVDISCARD_NONKEY && !((flags & FLV_VIDEO_FRAMETYPE_MASK) == FLV_FRAME_KEY || is_audio))
500 ||(st->discard >= AVDISCARD_BIDIR && ((flags & FLV_VIDEO_FRAMETYPE_MASK) == FLV_FRAME_DISP_INTER && !is_audio))
f3356e9c
MN
501 || st->discard >= AVDISCARD_ALL
502 ){
6b4aa5da 503 avio_seek(s->pb, next, SEEK_SET);
ded01499 504 continue;
b9866ebc 505 }
6cac3a3b 506 if ((flags & FLV_VIDEO_FRAMETYPE_MASK) == FLV_FRAME_KEY)
7ef94d22 507 av_add_index_entry(st, pos, dts, size, 0, AVINDEX_KEYFRAME);
068f2a22
MN
508 break;
509 }
510
15f14fc7 511 // if not streamed and no duration from metadata then seek to end to find the duration from the timestamps
8978feda 512 if(s->pb->seekable && (!s->duration || s->duration==AV_NOPTS_VALUE)){
15f14fc7 513 int size;
a2704c97 514 const int64_t pos= avio_tell(s->pb);
76aa876e 515 const int64_t fsize= avio_size(s->pb);
6b4aa5da 516 avio_seek(s->pb, fsize-4, SEEK_SET);
b7effd4e 517 size= avio_rb32(s->pb);
6b4aa5da 518 avio_seek(s->pb, fsize-3-size, SEEK_SET);
b7effd4e
AK
519 if(size == avio_rb24(s->pb) + 11){
520 uint32_t ts = avio_rb24(s->pb);
521 ts |= avio_r8(s->pb) << 24;
b126dee9 522 s->duration = ts * (int64_t)AV_TIME_BASE / 1000;
15f14fc7 523 }
6b4aa5da 524 avio_seek(s->pb, pos, SEEK_SET);
15f14fc7
MN
525 }
526
068f2a22 527 if(is_audio){
2215c39e
MS
528 int bits_per_coded_sample;
529 channels = (flags & FLV_AUDIO_CHANNEL_MASK) == FLV_STEREO ? 2 : 1;
530 sample_rate = (44100 << ((flags & FLV_AUDIO_SAMPLERATE_MASK) >> FLV_AUDIO_SAMPLERATE_OFFSET) >> 3);
531 bits_per_coded_sample = (flags & FLV_AUDIO_SAMPLESIZE_MASK) ? 16 : 8;
2f3d7ea9 532 if(!st->codec->channels || !st->codec->sample_rate || !st->codec->bits_per_coded_sample) {
2215c39e
MS
533 st->codec->channels = channels;
534 st->codec->sample_rate = sample_rate;
535 st->codec->bits_per_coded_sample = bits_per_coded_sample;
2f3d7ea9
MN
536 }
537 if(!st->codec->codec_id){
2215c39e
MS
538 flv_set_audio_codec(s, st, st->codec, flags & FLV_AUDIO_CODECID_MASK);
539 flv->last_sample_rate = st->codec->sample_rate;
540 flv->last_channels = st->codec->channels;
541 } else {
542 AVCodecContext ctx;
543 ctx.sample_rate = sample_rate;
544 flv_set_audio_codec(s, st, &ctx, flags & FLV_AUDIO_CODECID_MASK);
545 sample_rate = ctx.sample_rate;
068f2a22
MN
546 }
547 }else{
428cc588 548 size -= flv_set_video_codec(s, st, flags & FLV_VIDEO_CODECID_MASK);
bb01a3f0
MN
549 }
550
04fd3e81
BC
551 if (st->codec->codec_id == CODEC_ID_AAC ||
552 st->codec->codec_id == CODEC_ID_H264) {
b7effd4e 553 int type = avio_r8(s->pb);
04fd3e81
BC
554 size--;
555 if (st->codec->codec_id == CODEC_ID_H264) {
b7effd4e 556 int32_t cts = (avio_rb24(s->pb)+0xff800000)^0xff800000; // sign extension
ebd61055
BC
557 pts = dts + cts;
558 if (cts < 0) { // dts are wrong
559 flv->wrong_dts = 1;
560 av_log(s, AV_LOG_WARNING, "negative cts, previous timestamps might be wrong\n");
561 }
562 if (flv->wrong_dts)
563 dts = AV_NOPTS_VALUE;
04fd3e81
BC
564 }
565 if (type == 0) {
251f320f
MS
566 if (st->codec->extradata) {
567 if ((ret = flv_queue_extradata(flv, s->pb, is_audio, size)) < 0)
568 return ret;
569 ret = AVERROR(EAGAIN);
570 goto leave;
571 }
6298eb81 572 if ((ret = flv_get_extradata(s, st, size)) < 0)
04fd3e81 573 return ret;
d2718187
BC
574 if (st->codec->codec_id == CODEC_ID_AAC) {
575 MPEG4AudioConfig cfg;
59a9a235 576 avpriv_mpeg4audio_get_config(&cfg, st->codec->extradata,
fd095539 577 st->codec->extradata_size * 8, 1);
5aea268d 578 st->codec->channels = cfg.channels;
7d6096e4
BC
579 if (cfg.ext_sample_rate)
580 st->codec->sample_rate = cfg.ext_sample_rate;
581 else
582 st->codec->sample_rate = cfg.sample_rate;
dfd2a005 583 av_dlog(s, "mp4a config channels %d sample rate %d\n",
d2718187
BC
584 st->codec->channels, st->codec->sample_rate);
585 }
586
527c2e64
HC
587 ret = AVERROR(EAGAIN);
588 goto leave;
04fd3e81
BC
589 }
590 }
591
fcb4228c 592 /* skip empty data packets */
527c2e64
HC
593 if (!size) {
594 ret = AVERROR(EAGAIN);
595 goto leave;
596 }
fcb4228c 597
6298eb81 598 ret= av_get_packet(s->pb, pkt, size);
634b927f 599 if (ret < 0) {
6f3e0b21 600 return AVERROR(EIO);
d4f5d74a
GM
601 }
602 /* note: we need to modify the packet size here to handle the last
603 packet */
604 pkt->size = ret;
7ef94d22 605 pkt->dts = dts;
ebd61055 606 pkt->pts = pts == AV_NOPTS_VALUE ? dts : pts;
d4f5d74a 607 pkt->stream_index = st->index;
251f320f
MS
608 if (flv->new_extradata[is_audio]) {
609 uint8_t *side = av_packet_new_side_data(pkt, AV_PKT_DATA_NEW_EXTRADATA,
610 flv->new_extradata_size[is_audio]);
611 if (side) {
612 memcpy(side, flv->new_extradata[is_audio],
613 flv->new_extradata_size[is_audio]);
614 av_freep(&flv->new_extradata[is_audio]);
615 flv->new_extradata_size[is_audio] = 0;
616 }
617 }
2215c39e
MS
618 if (is_audio && (sample_rate != flv->last_sample_rate ||
619 channels != flv->last_channels)) {
620 flv->last_sample_rate = sample_rate;
621 flv->last_channels = channels;
622 ff_add_param_change(pkt, channels, 0, sample_rate, 0, 0);
623 }
115329f1 624
6cac3a3b 625 if (is_audio || ((flags & FLV_VIDEO_FRAMETYPE_MASK) == FLV_FRAME_KEY))
cc947f04 626 pkt->flags |= AV_PKT_FLAG_KEY;
115329f1 627
527c2e64 628leave:
45a8a02a 629 avio_skip(s->pb, 4);
d4f5d74a
GM
630 return ret;
631}
632
fc8fa007
HC
633static int flv_read_seek(AVFormatContext *s, int stream_index,
634 int64_t ts, int flags)
635{
ff1ec0c3 636 return avio_seek_time(s->pb, stream_index, ts, flags);
fc8fa007
HC
637}
638
639#if 0 /* don't know enough to implement this */
640static int flv_read_seek2(AVFormatContext *s, int stream_index,
641 int64_t min_ts, int64_t ts, int64_t max_ts, int flags)
642{
643 int ret = AVERROR(ENOSYS);
644
645 if (ts - min_ts > (uint64_t)(max_ts - ts)) flags |= AVSEEK_FLAG_BACKWARD;
646
8978feda 647 if (!s->pb->seekable) {
fc8fa007
HC
648 if (stream_index < 0) {
649 stream_index = av_find_default_stream_index(s);
650 if (stream_index < 0)
651 return -1;
652
653 /* timestamp for default must be expressed in AV_TIME_BASE units */
654 ts = av_rescale_rnd(ts, 1000, AV_TIME_BASE,
655 flags & AVSEEK_FLAG_BACKWARD ? AV_ROUND_DOWN : AV_ROUND_UP);
656 }
ff1ec0c3 657 ret = avio_seek_time(s->pb, stream_index, ts, flags);
fc8fa007
HC
658 }
659
660 if (ret == AVERROR(ENOSYS))
661 ret = av_seek_frame(s, stream_index, ts, flags);
662 return ret;
663}
664#endif
665
c6610a21 666AVInputFormat ff_flv_demuxer = {
dfc2c4d9
AK
667 .name = "flv",
668 .long_name = NULL_IF_CONFIG_SMALL("FLV format"),
669 .priv_data_size = sizeof(FLVContext),
670 .read_probe = flv_probe,
671 .read_header = flv_read_header,
672 .read_packet = flv_read_packet,
fc8fa007
HC
673 .read_seek = flv_read_seek,
674#if 0
675 .read_seek2 = flv_read_seek2,
676#endif
251f320f 677 .read_close = flv_read_close,
d4f5d74a 678 .extensions = "flv",
d4f5d74a 679};