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00027 #include "libavutil/avstring.h"
00028 #include "libavutil/dict.h"
00029 #include "libavutil/intfloat.h"
00030 #include "libavutil/mathematics.h"
00031 #include "libavcodec/bytestream.h"
00032 #include "libavcodec/mpeg4audio.h"
00033 #include "avformat.h"
00034 #include "internal.h"
00035 #include "avio_internal.h"
00036 #include "flv.h"
00037
00038 #define KEYFRAMES_TAG "keyframes"
00039 #define KEYFRAMES_TIMESTAMP_TAG "times"
00040 #define KEYFRAMES_BYTEOFFSET_TAG "filepositions"
00041
00042 typedef struct {
00043 int wrong_dts;
00044 uint8_t *new_extradata[2];
00045 int new_extradata_size[2];
00046 int last_sample_rate;
00047 int last_channels;
00048 } FLVContext;
00049
00050 static int flv_probe(AVProbeData *p)
00051 {
00052 const uint8_t *d;
00053
00054 d = p->buf;
00055 if (d[0] == 'F' && d[1] == 'L' && d[2] == 'V' && d[3] < 5 && d[5]==0 && AV_RB32(d+5)>8) {
00056 return AVPROBE_SCORE_MAX;
00057 }
00058 return 0;
00059 }
00060
00061 static void flv_set_audio_codec(AVFormatContext *s, AVStream *astream, AVCodecContext *acodec, int flv_codecid) {
00062 switch(flv_codecid) {
00063
00064 case FLV_CODECID_PCM:
00065 acodec->codec_id = acodec->bits_per_coded_sample == 8 ? CODEC_ID_PCM_U8 :
00066 #if HAVE_BIGENDIAN
00067 CODEC_ID_PCM_S16BE;
00068 #else
00069 CODEC_ID_PCM_S16LE;
00070 #endif
00071 break;
00072 case FLV_CODECID_PCM_LE:
00073 acodec->codec_id = acodec->bits_per_coded_sample == 8 ? CODEC_ID_PCM_U8 : CODEC_ID_PCM_S16LE; break;
00074 case FLV_CODECID_AAC : acodec->codec_id = CODEC_ID_AAC; break;
00075 case FLV_CODECID_ADPCM: acodec->codec_id = CODEC_ID_ADPCM_SWF; break;
00076 case FLV_CODECID_SPEEX:
00077 acodec->codec_id = CODEC_ID_SPEEX;
00078 acodec->sample_rate = 16000;
00079 break;
00080 case FLV_CODECID_MP3 : acodec->codec_id = CODEC_ID_MP3 ; astream->need_parsing = AVSTREAM_PARSE_FULL; break;
00081 case FLV_CODECID_NELLYMOSER_8KHZ_MONO:
00082 acodec->sample_rate = 8000;
00083 acodec->codec_id = CODEC_ID_NELLYMOSER;
00084 break;
00085 case FLV_CODECID_NELLYMOSER_16KHZ_MONO:
00086 acodec->sample_rate = 16000;
00087 acodec->codec_id = CODEC_ID_NELLYMOSER;
00088 break;
00089 case FLV_CODECID_NELLYMOSER:
00090 acodec->codec_id = CODEC_ID_NELLYMOSER;
00091 break;
00092 default:
00093 av_log(s, AV_LOG_INFO, "Unsupported audio codec (%x)\n", flv_codecid >> FLV_AUDIO_CODECID_OFFSET);
00094 acodec->codec_tag = flv_codecid >> FLV_AUDIO_CODECID_OFFSET;
00095 }
00096 }
00097
00098 static int flv_set_video_codec(AVFormatContext *s, AVStream *vstream, int flv_codecid) {
00099 AVCodecContext *vcodec = vstream->codec;
00100 switch(flv_codecid) {
00101 case FLV_CODECID_H263 : vcodec->codec_id = CODEC_ID_FLV1 ; break;
00102 case FLV_CODECID_SCREEN: vcodec->codec_id = CODEC_ID_FLASHSV; break;
00103 case FLV_CODECID_SCREEN2: vcodec->codec_id = CODEC_ID_FLASHSV2; break;
00104 case FLV_CODECID_VP6 : vcodec->codec_id = CODEC_ID_VP6F ;
00105 case FLV_CODECID_VP6A :
00106 if(flv_codecid == FLV_CODECID_VP6A)
00107 vcodec->codec_id = CODEC_ID_VP6A;
00108 if(vcodec->extradata_size != 1) {
00109 vcodec->extradata_size = 1;
00110 vcodec->extradata = av_malloc(1);
00111 }
00112 vcodec->extradata[0] = avio_r8(s->pb);
00113 return 1;
00114 case FLV_CODECID_H264:
00115 vcodec->codec_id = CODEC_ID_H264;
00116 return 3;
00117 default:
00118 av_log(s, AV_LOG_INFO, "Unsupported video codec (%x)\n", flv_codecid);
00119 vcodec->codec_tag = flv_codecid;
00120 }
00121
00122 return 0;
00123 }
00124
00125 static int amf_get_string(AVIOContext *ioc, char *buffer, int buffsize) {
00126 int length = avio_rb16(ioc);
00127 if(length >= buffsize) {
00128 avio_skip(ioc, length);
00129 return -1;
00130 }
00131
00132 avio_read(ioc, buffer, length);
00133
00134 buffer[length] = '\0';
00135
00136 return length;
00137 }
00138
00139 static int parse_keyframes_index(AVFormatContext *s, AVIOContext *ioc, AVStream *vstream, int64_t max_pos) {
00140 unsigned int arraylen = 0, timeslen = 0, fileposlen = 0, i;
00141 double num_val;
00142 char str_val[256];
00143 int64_t *times = NULL;
00144 int64_t *filepositions = NULL;
00145 int ret = AVERROR(ENOSYS);
00146 int64_t initial_pos = avio_tell(ioc);
00147 AVDictionaryEntry *creator = av_dict_get(s->metadata, "metadatacreator",
00148 NULL, 0);
00149
00150 if (creator && !strcmp(creator->value, "MEGA")) {
00151
00152
00153
00154
00155
00156
00157 return 0;
00158 }
00159
00160 while (avio_tell(ioc) < max_pos - 2 && amf_get_string(ioc, str_val, sizeof(str_val)) > 0) {
00161 int64_t* current_array;
00162
00163
00164 if (avio_r8(ioc) != AMF_DATA_TYPE_ARRAY)
00165 break;
00166
00167 arraylen = avio_rb32(ioc);
00168 if (arraylen >> 28)
00169 break;
00170
00171
00172
00173
00174
00175 if (!strcmp(KEYFRAMES_TIMESTAMP_TAG, str_val) && !times) {
00176 if (!(times = av_mallocz(sizeof(*times) * arraylen))) {
00177 ret = AVERROR(ENOMEM);
00178 goto finish;
00179 }
00180 timeslen = arraylen;
00181 current_array = times;
00182 } else if (!strcmp(KEYFRAMES_BYTEOFFSET_TAG, str_val) && !filepositions) {
00183 if (!(filepositions = av_mallocz(sizeof(*filepositions) * arraylen))) {
00184 ret = AVERROR(ENOMEM);
00185 goto finish;
00186 }
00187 fileposlen = arraylen;
00188 current_array = filepositions;
00189 } else
00190 break;
00191
00192 for (i = 0; i < arraylen && avio_tell(ioc) < max_pos - 1; i++) {
00193 if (avio_r8(ioc) != AMF_DATA_TYPE_NUMBER)
00194 goto finish;
00195 num_val = av_int2double(avio_rb64(ioc));
00196 current_array[i] = num_val;
00197 }
00198 if (times && filepositions) {
00199
00200
00201 ret = 0;
00202 break;
00203 }
00204 }
00205
00206 if (!ret && timeslen == fileposlen)
00207 for (i = 0; i < fileposlen; i++)
00208 av_add_index_entry(vstream, filepositions[i], times[i]*1000, 0, 0, AVINDEX_KEYFRAME);
00209 else
00210 av_log(s, AV_LOG_WARNING, "Invalid keyframes object, skipping.\n");
00211
00212 finish:
00213 av_freep(×);
00214 av_freep(&filepositions);
00215
00216
00217 if (ret < 0 && avio_seek(ioc, initial_pos, SEEK_SET) > 0)
00218 return 0;
00219 return ret;
00220 }
00221
00222 static int amf_parse_object(AVFormatContext *s, AVStream *astream, AVStream *vstream, const char *key, int64_t max_pos, int depth) {
00223 AVCodecContext *acodec, *vcodec;
00224 AVIOContext *ioc;
00225 AMFDataType amf_type;
00226 char str_val[256];
00227 double num_val;
00228
00229 num_val = 0;
00230 ioc = s->pb;
00231
00232 amf_type = avio_r8(ioc);
00233
00234 switch(amf_type) {
00235 case AMF_DATA_TYPE_NUMBER:
00236 num_val = av_int2double(avio_rb64(ioc)); break;
00237 case AMF_DATA_TYPE_BOOL:
00238 num_val = avio_r8(ioc); break;
00239 case AMF_DATA_TYPE_STRING:
00240 if(amf_get_string(ioc, str_val, sizeof(str_val)) < 0)
00241 return -1;
00242 break;
00243 case AMF_DATA_TYPE_OBJECT: {
00244 unsigned int keylen;
00245
00246 if ((vstream || astream) && key && !strcmp(KEYFRAMES_TAG, key) && depth == 1)
00247 if (parse_keyframes_index(s, ioc, vstream ? vstream : astream,
00248 max_pos) < 0)
00249 return -1;
00250
00251 while(avio_tell(ioc) < max_pos - 2 && (keylen = avio_rb16(ioc))) {
00252 avio_skip(ioc, keylen);
00253 if(amf_parse_object(s, NULL, NULL, NULL, max_pos, depth + 1) < 0)
00254 return -1;
00255 }
00256 if(avio_r8(ioc) != AMF_END_OF_OBJECT)
00257 return -1;
00258 }
00259 break;
00260 case AMF_DATA_TYPE_NULL:
00261 case AMF_DATA_TYPE_UNDEFINED:
00262 case AMF_DATA_TYPE_UNSUPPORTED:
00263 break;
00264 case AMF_DATA_TYPE_MIXEDARRAY:
00265 avio_skip(ioc, 4);
00266 while(avio_tell(ioc) < max_pos - 2 && amf_get_string(ioc, str_val, sizeof(str_val)) > 0) {
00267
00268 if(amf_parse_object(s, astream, vstream, str_val, max_pos, depth + 1) < 0)
00269 return -1;
00270 }
00271 if(avio_r8(ioc) != AMF_END_OF_OBJECT)
00272 return -1;
00273 break;
00274 case AMF_DATA_TYPE_ARRAY: {
00275 unsigned int arraylen, i;
00276
00277 arraylen = avio_rb32(ioc);
00278 for(i = 0; i < arraylen && avio_tell(ioc) < max_pos - 1; i++) {
00279 if(amf_parse_object(s, NULL, NULL, NULL, max_pos, depth + 1) < 0)
00280 return -1;
00281 }
00282 }
00283 break;
00284 case AMF_DATA_TYPE_DATE:
00285 avio_skip(ioc, 8 + 2);
00286 break;
00287 default:
00288 return -1;
00289 }
00290
00291 if(depth == 1 && key) {
00292 acodec = astream ? astream->codec : NULL;
00293 vcodec = vstream ? vstream->codec : NULL;
00294
00295 if (amf_type == AMF_DATA_TYPE_NUMBER) {
00296 if (!strcmp(key, "duration"))
00297 s->duration = num_val * AV_TIME_BASE;
00298 else if (!strcmp(key, "videodatarate") && vcodec && 0 <= (int)(num_val * 1024.0))
00299 vcodec->bit_rate = num_val * 1024.0;
00300 else if (!strcmp(key, "audiodatarate") && acodec && 0 <= (int)(num_val * 1024.0))
00301 acodec->bit_rate = num_val * 1024.0;
00302 }
00303
00304 if (!strcmp(key, "duration") ||
00305 !strcmp(key, "filesize") ||
00306 !strcmp(key, "width") ||
00307 !strcmp(key, "height") ||
00308 !strcmp(key, "videodatarate") ||
00309 !strcmp(key, "framerate") ||
00310 !strcmp(key, "videocodecid") ||
00311 !strcmp(key, "audiodatarate") ||
00312 !strcmp(key, "audiosamplerate") ||
00313 !strcmp(key, "audiosamplesize") ||
00314 !strcmp(key, "stereo") ||
00315 !strcmp(key, "audiocodecid"))
00316 return 0;
00317
00318 if(amf_type == AMF_DATA_TYPE_BOOL) {
00319 av_strlcpy(str_val, num_val > 0 ? "true" : "false", sizeof(str_val));
00320 av_dict_set(&s->metadata, key, str_val, 0);
00321 } else if(amf_type == AMF_DATA_TYPE_NUMBER) {
00322 snprintf(str_val, sizeof(str_val), "%.f", num_val);
00323 av_dict_set(&s->metadata, key, str_val, 0);
00324 } else if (amf_type == AMF_DATA_TYPE_STRING)
00325 av_dict_set(&s->metadata, key, str_val, 0);
00326 }
00327
00328 return 0;
00329 }
00330
00331 static int flv_read_metabody(AVFormatContext *s, int64_t next_pos) {
00332 AMFDataType type;
00333 AVStream *stream, *astream, *vstream;
00334 AVIOContext *ioc;
00335 int i;
00336 char buffer[11];
00337
00338 astream = NULL;
00339 vstream = NULL;
00340 ioc = s->pb;
00341
00342
00343 type = avio_r8(ioc);
00344 if(type != AMF_DATA_TYPE_STRING || amf_get_string(ioc, buffer, sizeof(buffer)) < 0 || strcmp(buffer, "onMetaData"))
00345 return -1;
00346
00347
00348 for(i = 0; i < s->nb_streams; i++) {
00349 stream = s->streams[i];
00350 if (stream->codec->codec_type == AVMEDIA_TYPE_AUDIO) astream = stream;
00351 else if(stream->codec->codec_type == AVMEDIA_TYPE_VIDEO) vstream = stream;
00352 }
00353
00354
00355 if(amf_parse_object(s, astream, vstream, buffer, next_pos, 0) < 0)
00356 return -1;
00357
00358 return 0;
00359 }
00360
00361 static AVStream *create_stream(AVFormatContext *s, int is_audio){
00362 AVStream *st = avformat_new_stream(s, NULL);
00363 if (!st)
00364 return NULL;
00365 st->id = is_audio;
00366 st->codec->codec_type = is_audio ? AVMEDIA_TYPE_AUDIO : AVMEDIA_TYPE_VIDEO;
00367 avpriv_set_pts_info(st, 32, 1, 1000);
00368 return st;
00369 }
00370
00371 static int flv_read_header(AVFormatContext *s,
00372 AVFormatParameters *ap)
00373 {
00374 int offset, flags;
00375
00376 avio_skip(s->pb, 4);
00377 flags = avio_r8(s->pb);
00378
00379
00380 if (!flags) {
00381 flags = FLV_HEADER_FLAG_HASVIDEO | FLV_HEADER_FLAG_HASAUDIO;
00382 av_log(s, AV_LOG_WARNING, "Broken FLV file, which says no streams present, this might fail\n");
00383 }
00384
00385 if((flags & (FLV_HEADER_FLAG_HASVIDEO|FLV_HEADER_FLAG_HASAUDIO))
00386 != (FLV_HEADER_FLAG_HASVIDEO|FLV_HEADER_FLAG_HASAUDIO))
00387 s->ctx_flags |= AVFMTCTX_NOHEADER;
00388
00389 if(flags & FLV_HEADER_FLAG_HASVIDEO){
00390 if(!create_stream(s, 0))
00391 return AVERROR(ENOMEM);
00392 }
00393 if(flags & FLV_HEADER_FLAG_HASAUDIO){
00394 if(!create_stream(s, 1))
00395 return AVERROR(ENOMEM);
00396 }
00397
00398 offset = avio_rb32(s->pb);
00399 avio_seek(s->pb, offset, SEEK_SET);
00400 avio_skip(s->pb, 4);
00401
00402 s->start_time = 0;
00403
00404 return 0;
00405 }
00406
00407 static int flv_read_close(AVFormatContext *s)
00408 {
00409 FLVContext *flv = s->priv_data;
00410 av_freep(&flv->new_extradata[0]);
00411 av_freep(&flv->new_extradata[1]);
00412 return 0;
00413 }
00414
00415 static int flv_get_extradata(AVFormatContext *s, AVStream *st, int size)
00416 {
00417 av_free(st->codec->extradata);
00418 st->codec->extradata = av_mallocz(size + FF_INPUT_BUFFER_PADDING_SIZE);
00419 if (!st->codec->extradata)
00420 return AVERROR(ENOMEM);
00421 st->codec->extradata_size = size;
00422 avio_read(s->pb, st->codec->extradata, st->codec->extradata_size);
00423 return 0;
00424 }
00425
00426 static int flv_queue_extradata(FLVContext *flv, AVIOContext *pb, int stream,
00427 int size)
00428 {
00429 av_free(flv->new_extradata[stream]);
00430 flv->new_extradata[stream] = av_mallocz(size + FF_INPUT_BUFFER_PADDING_SIZE);
00431 if (!flv->new_extradata[stream])
00432 return AVERROR(ENOMEM);
00433 flv->new_extradata_size[stream] = size;
00434 avio_read(pb, flv->new_extradata[stream], size);
00435 return 0;
00436 }
00437
00438 static int flv_read_packet(AVFormatContext *s, AVPacket *pkt)
00439 {
00440 FLVContext *flv = s->priv_data;
00441 int ret, i, type, size, flags, is_audio;
00442 int64_t next, pos;
00443 int64_t dts, pts = AV_NOPTS_VALUE;
00444 int sample_rate = 0, channels = 0;
00445 AVStream *st = NULL;
00446
00447 for(;;avio_skip(s->pb, 4)){
00448 pos = avio_tell(s->pb);
00449 type = avio_r8(s->pb);
00450 size = avio_rb24(s->pb);
00451 dts = avio_rb24(s->pb);
00452 dts |= avio_r8(s->pb) << 24;
00453 av_dlog(s, "type:%d, size:%d, dts:%"PRId64"\n", type, size, dts);
00454 if (s->pb->eof_reached)
00455 return AVERROR_EOF;
00456 avio_skip(s->pb, 3);
00457 flags = 0;
00458
00459 if(size == 0)
00460 continue;
00461
00462 next= size + avio_tell(s->pb);
00463
00464 if (type == FLV_TAG_TYPE_AUDIO) {
00465 is_audio=1;
00466 flags = avio_r8(s->pb);
00467 size--;
00468 } else if (type == FLV_TAG_TYPE_VIDEO) {
00469 is_audio=0;
00470 flags = avio_r8(s->pb);
00471 size--;
00472 if ((flags & 0xf0) == 0x50)
00473 goto skip;
00474 } else {
00475 if (type == FLV_TAG_TYPE_META && size > 13+1+4)
00476 flv_read_metabody(s, next);
00477 else
00478 av_log(s, AV_LOG_DEBUG, "skipping flv packet: type %d, size %d, flags %d\n", type, size, flags);
00479 skip:
00480 avio_seek(s->pb, next, SEEK_SET);
00481 continue;
00482 }
00483
00484
00485 if (!size)
00486 continue;
00487
00488
00489 for(i=0;i<s->nb_streams;i++) {
00490 st = s->streams[i];
00491 if (st->id == is_audio)
00492 break;
00493 }
00494 if(i == s->nb_streams){
00495 av_log(s, AV_LOG_ERROR, "invalid stream\n");
00496 st= create_stream(s, is_audio);
00497 s->ctx_flags &= ~AVFMTCTX_NOHEADER;
00498 }
00499 av_dlog(s, "%d %X %d \n", is_audio, flags, st->discard);
00500 if( (st->discard >= AVDISCARD_NONKEY && !((flags & FLV_VIDEO_FRAMETYPE_MASK) == FLV_FRAME_KEY || is_audio))
00501 ||(st->discard >= AVDISCARD_BIDIR && ((flags & FLV_VIDEO_FRAMETYPE_MASK) == FLV_FRAME_DISP_INTER && !is_audio))
00502 || st->discard >= AVDISCARD_ALL
00503 ){
00504 avio_seek(s->pb, next, SEEK_SET);
00505 continue;
00506 }
00507 if ((flags & FLV_VIDEO_FRAMETYPE_MASK) == FLV_FRAME_KEY)
00508 av_add_index_entry(st, pos, dts, size, 0, AVINDEX_KEYFRAME);
00509 break;
00510 }
00511
00512
00513 if(s->pb->seekable && (!s->duration || s->duration==AV_NOPTS_VALUE)){
00514 int size;
00515 const int64_t pos= avio_tell(s->pb);
00516 const int64_t fsize= avio_size(s->pb);
00517 avio_seek(s->pb, fsize-4, SEEK_SET);
00518 size= avio_rb32(s->pb);
00519 avio_seek(s->pb, fsize-3-size, SEEK_SET);
00520 if(size == avio_rb24(s->pb) + 11){
00521 uint32_t ts = avio_rb24(s->pb);
00522 ts |= avio_r8(s->pb) << 24;
00523 s->duration = ts * (int64_t)AV_TIME_BASE / 1000;
00524 }
00525 avio_seek(s->pb, pos, SEEK_SET);
00526 }
00527
00528 if(is_audio){
00529 int bits_per_coded_sample;
00530 channels = (flags & FLV_AUDIO_CHANNEL_MASK) == FLV_STEREO ? 2 : 1;
00531 sample_rate = (44100 << ((flags & FLV_AUDIO_SAMPLERATE_MASK) >> FLV_AUDIO_SAMPLERATE_OFFSET) >> 3);
00532 bits_per_coded_sample = (flags & FLV_AUDIO_SAMPLESIZE_MASK) ? 16 : 8;
00533 if(!st->codec->channels || !st->codec->sample_rate || !st->codec->bits_per_coded_sample) {
00534 st->codec->channels = channels;
00535 st->codec->sample_rate = sample_rate;
00536 st->codec->bits_per_coded_sample = bits_per_coded_sample;
00537 }
00538 if(!st->codec->codec_id){
00539 flv_set_audio_codec(s, st, st->codec, flags & FLV_AUDIO_CODECID_MASK);
00540 flv->last_sample_rate = st->codec->sample_rate;
00541 flv->last_channels = st->codec->channels;
00542 } else {
00543 AVCodecContext ctx;
00544 ctx.sample_rate = sample_rate;
00545 flv_set_audio_codec(s, st, &ctx, flags & FLV_AUDIO_CODECID_MASK);
00546 sample_rate = ctx.sample_rate;
00547 }
00548 }else{
00549 size -= flv_set_video_codec(s, st, flags & FLV_VIDEO_CODECID_MASK);
00550 }
00551
00552 if (st->codec->codec_id == CODEC_ID_AAC ||
00553 st->codec->codec_id == CODEC_ID_H264) {
00554 int type = avio_r8(s->pb);
00555 size--;
00556 if (st->codec->codec_id == CODEC_ID_H264) {
00557 int32_t cts = (avio_rb24(s->pb)+0xff800000)^0xff800000;
00558 pts = dts + cts;
00559 if (cts < 0) {
00560 flv->wrong_dts = 1;
00561 av_log(s, AV_LOG_WARNING, "negative cts, previous timestamps might be wrong\n");
00562 }
00563 if (flv->wrong_dts)
00564 dts = AV_NOPTS_VALUE;
00565 }
00566 if (type == 0) {
00567 if (st->codec->extradata) {
00568 if ((ret = flv_queue_extradata(flv, s->pb, is_audio, size)) < 0)
00569 return ret;
00570 ret = AVERROR(EAGAIN);
00571 goto leave;
00572 }
00573 if ((ret = flv_get_extradata(s, st, size)) < 0)
00574 return ret;
00575 if (st->codec->codec_id == CODEC_ID_AAC) {
00576 MPEG4AudioConfig cfg;
00577 avpriv_mpeg4audio_get_config(&cfg, st->codec->extradata,
00578 st->codec->extradata_size * 8, 1);
00579 st->codec->channels = cfg.channels;
00580 if (cfg.ext_sample_rate)
00581 st->codec->sample_rate = cfg.ext_sample_rate;
00582 else
00583 st->codec->sample_rate = cfg.sample_rate;
00584 av_dlog(s, "mp4a config channels %d sample rate %d\n",
00585 st->codec->channels, st->codec->sample_rate);
00586 }
00587
00588 ret = AVERROR(EAGAIN);
00589 goto leave;
00590 }
00591 }
00592
00593
00594 if (!size) {
00595 ret = AVERROR(EAGAIN);
00596 goto leave;
00597 }
00598
00599 ret= av_get_packet(s->pb, pkt, size);
00600 if (ret < 0) {
00601 return AVERROR(EIO);
00602 }
00603
00604
00605 pkt->size = ret;
00606 pkt->dts = dts;
00607 pkt->pts = pts == AV_NOPTS_VALUE ? dts : pts;
00608 pkt->stream_index = st->index;
00609 if (flv->new_extradata[is_audio]) {
00610 uint8_t *side = av_packet_new_side_data(pkt, AV_PKT_DATA_NEW_EXTRADATA,
00611 flv->new_extradata_size[is_audio]);
00612 if (side) {
00613 memcpy(side, flv->new_extradata[is_audio],
00614 flv->new_extradata_size[is_audio]);
00615 av_freep(&flv->new_extradata[is_audio]);
00616 flv->new_extradata_size[is_audio] = 0;
00617 }
00618 }
00619 if (is_audio && (sample_rate != flv->last_sample_rate ||
00620 channels != flv->last_channels)) {
00621 flv->last_sample_rate = sample_rate;
00622 flv->last_channels = channels;
00623 ff_add_param_change(pkt, channels, 0, sample_rate, 0, 0);
00624 }
00625
00626 if (is_audio || ((flags & FLV_VIDEO_FRAMETYPE_MASK) == FLV_FRAME_KEY))
00627 pkt->flags |= AV_PKT_FLAG_KEY;
00628
00629 leave:
00630 avio_skip(s->pb, 4);
00631 return ret;
00632 }
00633
00634 static int flv_read_seek(AVFormatContext *s, int stream_index,
00635 int64_t ts, int flags)
00636 {
00637 return avio_seek_time(s->pb, stream_index, ts, flags);
00638 }
00639
00640 #if 0
00641 static int flv_read_seek2(AVFormatContext *s, int stream_index,
00642 int64_t min_ts, int64_t ts, int64_t max_ts, int flags)
00643 {
00644 int ret = AVERROR(ENOSYS);
00645
00646 if (ts - min_ts > (uint64_t)(max_ts - ts)) flags |= AVSEEK_FLAG_BACKWARD;
00647
00648 if (!s->pb->seekable) {
00649 if (stream_index < 0) {
00650 stream_index = av_find_default_stream_index(s);
00651 if (stream_index < 0)
00652 return -1;
00653
00654
00655 ts = av_rescale_rnd(ts, 1000, AV_TIME_BASE,
00656 flags & AVSEEK_FLAG_BACKWARD ? AV_ROUND_DOWN : AV_ROUND_UP);
00657 }
00658 ret = avio_seek_time(s->pb, stream_index, ts, flags);
00659 }
00660
00661 if (ret == AVERROR(ENOSYS))
00662 ret = av_seek_frame(s, stream_index, ts, flags);
00663 return ret;
00664 }
00665 #endif
00666
00667 AVInputFormat ff_flv_demuxer = {
00668 .name = "flv",
00669 .long_name = NULL_IF_CONFIG_SMALL("FLV format"),
00670 .priv_data_size = sizeof(FLVContext),
00671 .read_probe = flv_probe,
00672 .read_header = flv_read_header,
00673 .read_packet = flv_read_packet,
00674 .read_seek = flv_read_seek,
00675 #if 0
00676 .read_seek2 = flv_read_seek2,
00677 #endif
00678 .read_close = flv_read_close,
00679 .extensions = "flv",
00680 .value = CODEC_ID_FLV1,
00681 };