yading@11: /*
yading@11:  * FLV demuxer
yading@11:  * Copyright (c) 2003 The FFmpeg Project
yading@11:  *
yading@11:  * This demuxer will generate a 1 byte extradata for VP6F content.
yading@11:  * It is composed of:
yading@11:  *  - upper 4bits: difference between encoded width and visible width
yading@11:  *  - lower 4bits: difference between encoded height and visible height
yading@11:  *
yading@11:  * This file is part of FFmpeg.
yading@11:  *
yading@11:  * FFmpeg is free software; you can redistribute it and/or
yading@11:  * modify it under the terms of the GNU Lesser General Public
yading@11:  * License as published by the Free Software Foundation; either
yading@11:  * version 2.1 of the License, or (at your option) any later version.
yading@11:  *
yading@11:  * FFmpeg is distributed in the hope that it will be useful,
yading@11:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
yading@11:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
yading@11:  * Lesser General Public License for more details.
yading@11:  *
yading@11:  * You should have received a copy of the GNU Lesser General Public
yading@11:  * License along with FFmpeg; if not, write to the Free Software
yading@11:  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
yading@11:  */
yading@11: 
yading@11: #include "libavutil/avstring.h"
yading@11: #include "libavutil/channel_layout.h"
yading@11: #include "libavutil/dict.h"
yading@11: #include "libavutil/opt.h"
yading@11: #include "libavutil/intfloat.h"
yading@11: #include "libavutil/mathematics.h"
yading@11: #include "libavcodec/bytestream.h"
yading@11: #include "libavcodec/mpeg4audio.h"
yading@11: #include "avformat.h"
yading@11: #include "internal.h"
yading@11: #include "avio_internal.h"
yading@11: #include "flv.h"
yading@11: 
yading@11: #define VALIDATE_INDEX_TS_THRESH 2500
yading@11: 
yading@11: typedef struct {
yading@11:     const AVClass *class; ///< Class for private options.
yading@11:     int trust_metadata; ///< configure streams according onMetaData
yading@11:     int wrong_dts; ///< wrong dts due to negative cts
yading@11:     uint8_t *new_extradata[FLV_STREAM_TYPE_NB];
yading@11:     int      new_extradata_size[FLV_STREAM_TYPE_NB];
yading@11:     int      last_sample_rate;
yading@11:     int      last_channels;
yading@11:     struct {
yading@11:         int64_t dts;
yading@11:         int64_t pos;
yading@11:     } validate_index[2];
yading@11:     int validate_next;
yading@11:     int validate_count;
yading@11:     int searched_for_end;
yading@11: } FLVContext;
yading@11: 
yading@11: static int flv_probe(AVProbeData *p)
yading@11: {
yading@11:     const uint8_t *d;
yading@11: 
yading@11:     d = p->buf;
yading@11:     if (d[0] == 'F' && d[1] == 'L' && d[2] == 'V' && d[3] < 5 && d[5]==0 && AV_RB32(d+5)>8) {
yading@11:         return AVPROBE_SCORE_MAX;
yading@11:     }
yading@11:     return 0;
yading@11: }
yading@11: 
yading@11: static AVStream *create_stream(AVFormatContext *s, int codec_type)
yading@11: {
yading@11:     AVStream *st = avformat_new_stream(s, NULL);
yading@11:     if (!st)
yading@11:         return NULL;
yading@11:     st->codec->codec_type = codec_type;
yading@11:     if(s->nb_streams>=3 ||(   s->nb_streams==2
yading@11:                            && s->streams[0]->codec->codec_type != AVMEDIA_TYPE_DATA
yading@11:                            && s->streams[1]->codec->codec_type != AVMEDIA_TYPE_DATA))
yading@11:         s->ctx_flags &= ~AVFMTCTX_NOHEADER;
yading@11: 
yading@11:     avpriv_set_pts_info(st, 32, 1, 1000); /* 32 bit pts in ms */
yading@11:     return st;
yading@11: }
yading@11: static int flv_same_audio_codec(AVCodecContext *acodec, int flags)
yading@11: {
yading@11:     int bits_per_coded_sample = (flags & FLV_AUDIO_SAMPLESIZE_MASK) ? 16 : 8;
yading@11:     int flv_codecid = flags & FLV_AUDIO_CODECID_MASK;
yading@11:     int codec_id;
yading@11: 
yading@11:     if (!acodec->codec_id && !acodec->codec_tag)
yading@11:         return 1;
yading@11: 
yading@11:     if (acodec->bits_per_coded_sample != bits_per_coded_sample)
yading@11:         return 0;
yading@11: 
yading@11:     switch(flv_codecid) {
yading@11:         //no distinction between S16 and S8 PCM codec flags
yading@11:     case FLV_CODECID_PCM:
yading@11:         codec_id = bits_per_coded_sample == 8 ? AV_CODEC_ID_PCM_U8 :
yading@11: #if HAVE_BIGENDIAN
yading@11:                             AV_CODEC_ID_PCM_S16BE;
yading@11: #else
yading@11:                             AV_CODEC_ID_PCM_S16LE;
yading@11: #endif
yading@11:         return codec_id == acodec->codec_id;
yading@11:     case FLV_CODECID_PCM_LE:
yading@11:         codec_id = bits_per_coded_sample == 8 ? AV_CODEC_ID_PCM_U8 : AV_CODEC_ID_PCM_S16LE;
yading@11:         return codec_id == acodec->codec_id;
yading@11:     case FLV_CODECID_AAC:
yading@11:         return acodec->codec_id == AV_CODEC_ID_AAC;
yading@11:     case FLV_CODECID_ADPCM:
yading@11:         return acodec->codec_id == AV_CODEC_ID_ADPCM_SWF;
yading@11:     case FLV_CODECID_SPEEX:
yading@11:         return acodec->codec_id == AV_CODEC_ID_SPEEX;
yading@11:     case FLV_CODECID_MP3:
yading@11:         return acodec->codec_id == AV_CODEC_ID_MP3;
yading@11:     case FLV_CODECID_NELLYMOSER_8KHZ_MONO:
yading@11:     case FLV_CODECID_NELLYMOSER_16KHZ_MONO:
yading@11:     case FLV_CODECID_NELLYMOSER:
yading@11:         return acodec->codec_id == AV_CODEC_ID_NELLYMOSER;
yading@11:     case FLV_CODECID_PCM_MULAW:
yading@11:         return acodec->sample_rate == 8000 &&
yading@11:                acodec->codec_id == AV_CODEC_ID_PCM_MULAW;
yading@11:     case FLV_CODECID_PCM_ALAW:
yading@11:         return acodec->sample_rate = 8000 &&
yading@11:                acodec->codec_id == AV_CODEC_ID_PCM_ALAW;
yading@11:     default:
yading@11:         return acodec->codec_tag == (flv_codecid >> FLV_AUDIO_CODECID_OFFSET);
yading@11:     }
yading@11: }
yading@11: 
yading@11: static void flv_set_audio_codec(AVFormatContext *s, AVStream *astream, AVCodecContext *acodec, int flv_codecid) {
yading@11:     switch(flv_codecid) {
yading@11:         //no distinction between S16 and S8 PCM codec flags
yading@11:         case FLV_CODECID_PCM:
yading@11:             acodec->codec_id = acodec->bits_per_coded_sample == 8 ? AV_CODEC_ID_PCM_U8 :
yading@11: #if HAVE_BIGENDIAN
yading@11:                                 AV_CODEC_ID_PCM_S16BE;
yading@11: #else
yading@11:                                 AV_CODEC_ID_PCM_S16LE;
yading@11: #endif
yading@11:             break;
yading@11:         case FLV_CODECID_PCM_LE:
yading@11:             acodec->codec_id = acodec->bits_per_coded_sample == 8 ? AV_CODEC_ID_PCM_U8 : AV_CODEC_ID_PCM_S16LE; break;
yading@11:         case FLV_CODECID_AAC  : acodec->codec_id = AV_CODEC_ID_AAC;                                    break;
yading@11:         case FLV_CODECID_ADPCM: acodec->codec_id = AV_CODEC_ID_ADPCM_SWF;                              break;
yading@11:         case FLV_CODECID_SPEEX:
yading@11:             acodec->codec_id = AV_CODEC_ID_SPEEX;
yading@11:             acodec->sample_rate = 16000;
yading@11:             break;
yading@11:         case FLV_CODECID_MP3  : acodec->codec_id = AV_CODEC_ID_MP3      ; astream->need_parsing = AVSTREAM_PARSE_FULL; break;
yading@11:         case FLV_CODECID_NELLYMOSER_8KHZ_MONO:
yading@11:             acodec->sample_rate = 8000; //in case metadata does not otherwise declare samplerate
yading@11:             acodec->codec_id = AV_CODEC_ID_NELLYMOSER;
yading@11:             break;
yading@11:         case FLV_CODECID_NELLYMOSER_16KHZ_MONO:
yading@11:             acodec->sample_rate = 16000;
yading@11:             acodec->codec_id = AV_CODEC_ID_NELLYMOSER;
yading@11:             break;
yading@11:         case FLV_CODECID_NELLYMOSER:
yading@11:             acodec->codec_id = AV_CODEC_ID_NELLYMOSER;
yading@11:             break;
yading@11:         case FLV_CODECID_PCM_MULAW:
yading@11:             acodec->sample_rate = 8000;
yading@11:             acodec->codec_id = AV_CODEC_ID_PCM_MULAW;
yading@11:             break;
yading@11:         case FLV_CODECID_PCM_ALAW:
yading@11:             acodec->sample_rate = 8000;
yading@11:             acodec->codec_id = AV_CODEC_ID_PCM_ALAW;
yading@11:             break;
yading@11:         default:
yading@11:             av_log(s, AV_LOG_INFO, "Unsupported audio codec (%x)\n", flv_codecid >> FLV_AUDIO_CODECID_OFFSET);
yading@11:             acodec->codec_tag = flv_codecid >> FLV_AUDIO_CODECID_OFFSET;
yading@11:     }
yading@11: }
yading@11: 
yading@11: static int flv_same_video_codec(AVCodecContext *vcodec, int flags)
yading@11: {
yading@11:     int flv_codecid = flags & FLV_VIDEO_CODECID_MASK;
yading@11: 
yading@11:     if (!vcodec->codec_id && !vcodec->codec_tag)
yading@11:         return 1;
yading@11: 
yading@11:     switch (flv_codecid) {
yading@11:         case FLV_CODECID_H263:
yading@11:             return vcodec->codec_id == AV_CODEC_ID_FLV1;
yading@11:         case FLV_CODECID_SCREEN:
yading@11:             return vcodec->codec_id == AV_CODEC_ID_FLASHSV;
yading@11:         case FLV_CODECID_SCREEN2:
yading@11:             return vcodec->codec_id == AV_CODEC_ID_FLASHSV2;
yading@11:         case FLV_CODECID_VP6:
yading@11:             return vcodec->codec_id == AV_CODEC_ID_VP6F;
yading@11:         case FLV_CODECID_VP6A:
yading@11:             return vcodec->codec_id == AV_CODEC_ID_VP6A;
yading@11:         case FLV_CODECID_H264:
yading@11:             return vcodec->codec_id == AV_CODEC_ID_H264;
yading@11:         default:
yading@11:             return vcodec->codec_tag == flv_codecid;
yading@11:     }
yading@11: }
yading@11: 
yading@11: static int flv_set_video_codec(AVFormatContext *s, AVStream *vstream, int flv_codecid, int read) {
yading@11:     AVCodecContext *vcodec = vstream->codec;
yading@11:     switch(flv_codecid) {
yading@11:         case FLV_CODECID_H263  : vcodec->codec_id = AV_CODEC_ID_FLV1   ; break;
yading@11:         case FLV_CODECID_REALH263: vcodec->codec_id = AV_CODEC_ID_H263 ; break; // Really mean it this time
yading@11:         case FLV_CODECID_SCREEN: vcodec->codec_id = AV_CODEC_ID_FLASHSV; break;
yading@11:         case FLV_CODECID_SCREEN2: vcodec->codec_id = AV_CODEC_ID_FLASHSV2; break;
yading@11:         case FLV_CODECID_VP6   : vcodec->codec_id = AV_CODEC_ID_VP6F   ;
yading@11:         case FLV_CODECID_VP6A  :
yading@11:             if(flv_codecid == FLV_CODECID_VP6A)
yading@11:                 vcodec->codec_id = AV_CODEC_ID_VP6A;
yading@11:             if (read) {
yading@11:                 if (vcodec->extradata_size != 1) {
yading@11:                     vcodec->extradata = av_malloc(1 + FF_INPUT_BUFFER_PADDING_SIZE);
yading@11:                     if (vcodec->extradata)
yading@11:                         vcodec->extradata_size = 1;
yading@11:                 }
yading@11:                 if (vcodec->extradata)
yading@11:                     vcodec->extradata[0] = avio_r8(s->pb);
yading@11:                 else
yading@11:                     avio_skip(s->pb, 1);
yading@11:             }
yading@11:             return 1; // 1 byte body size adjustment for flv_read_packet()
yading@11:         case FLV_CODECID_H264:
yading@11:             vcodec->codec_id = AV_CODEC_ID_H264;
yading@11:             return 3; // not 4, reading packet type will consume one byte
yading@11:         case FLV_CODECID_MPEG4:
yading@11:             vcodec->codec_id = AV_CODEC_ID_MPEG4;
yading@11:             return 3;
yading@11:         default:
yading@11:             av_log(s, AV_LOG_INFO, "Unsupported video codec (%x)\n", flv_codecid);
yading@11:             vcodec->codec_tag = flv_codecid;
yading@11:     }
yading@11: 
yading@11:     return 0;
yading@11: }
yading@11: 
yading@11: static int amf_get_string(AVIOContext *ioc, char *buffer, int buffsize) {
yading@11:     int length = avio_rb16(ioc);
yading@11:     if(length >= buffsize) {
yading@11:         avio_skip(ioc, length);
yading@11:         return -1;
yading@11:     }
yading@11: 
yading@11:     avio_read(ioc, buffer, length);
yading@11: 
yading@11:     buffer[length] = '\0';
yading@11: 
yading@11:     return length;
yading@11: }
yading@11: 
yading@11: static int parse_keyframes_index(AVFormatContext *s, AVIOContext *ioc, AVStream *vstream, int64_t max_pos) {
yading@11:     FLVContext *flv = s->priv_data;
yading@11:     unsigned int timeslen = 0, fileposlen = 0, i;
yading@11:     char str_val[256];
yading@11:     int64_t *times = NULL;
yading@11:     int64_t *filepositions = NULL;
yading@11:     int ret = AVERROR(ENOSYS);
yading@11:     int64_t initial_pos = avio_tell(ioc);
yading@11: 
yading@11:     if(vstream->nb_index_entries>0){
yading@11:         av_log(s, AV_LOG_WARNING, "Skiping duplicate index\n");
yading@11:         return 0;
yading@11:     }
yading@11: 
yading@11:     if (s->flags & AVFMT_FLAG_IGNIDX)
yading@11:         return 0;
yading@11: 
yading@11:     while (avio_tell(ioc) < max_pos - 2 && amf_get_string(ioc, str_val, sizeof(str_val)) > 0) {
yading@11:         int64_t** current_array;
yading@11:         unsigned int arraylen;
yading@11: 
yading@11:         // Expect array object in context
yading@11:         if (avio_r8(ioc) != AMF_DATA_TYPE_ARRAY)
yading@11:             break;
yading@11: 
yading@11:         arraylen = avio_rb32(ioc);
yading@11:         if(arraylen>>28)
yading@11:             break;
yading@11: 
yading@11:         if       (!strcmp(KEYFRAMES_TIMESTAMP_TAG , str_val) && !times){
yading@11:             current_array= &times;
yading@11:             timeslen= arraylen;
yading@11:         }else if (!strcmp(KEYFRAMES_BYTEOFFSET_TAG, str_val) && !filepositions){
yading@11:             current_array= &filepositions;
yading@11:             fileposlen= arraylen;
yading@11:         }else // unexpected metatag inside keyframes, will not use such metadata for indexing
yading@11:             break;
yading@11: 
yading@11:         if (!(*current_array = av_mallocz(sizeof(**current_array) * arraylen))) {
yading@11:             ret = AVERROR(ENOMEM);
yading@11:             goto finish;
yading@11:         }
yading@11: 
yading@11:         for (i = 0; i < arraylen && avio_tell(ioc) < max_pos - 1; i++) {
yading@11:             if (avio_r8(ioc) != AMF_DATA_TYPE_NUMBER)
yading@11:                 goto invalid;
yading@11:             current_array[0][i] = av_int2double(avio_rb64(ioc));
yading@11:         }
yading@11:         if (times && filepositions) {
yading@11:             // All done, exiting at a position allowing amf_parse_object
yading@11:             // to finish parsing the object
yading@11:             ret = 0;
yading@11:             break;
yading@11:         }
yading@11:     }
yading@11: 
yading@11:     if (timeslen == fileposlen && fileposlen>1 && max_pos <= filepositions[0]) {
yading@11:         for (i = 0; i < fileposlen; i++) {
yading@11:             av_add_index_entry(vstream, filepositions[i], times[i]*1000,
yading@11:                                0, 0, AVINDEX_KEYFRAME);
yading@11:             if (i < 2) {
yading@11:                 flv->validate_index[i].pos = filepositions[i];
yading@11:                 flv->validate_index[i].dts = times[i] * 1000;
yading@11:                 flv->validate_count = i + 1;
yading@11:             }
yading@11:         }
yading@11:     } else {
yading@11: invalid:
yading@11:         av_log(s, AV_LOG_WARNING, "Invalid keyframes object, skipping.\n");
yading@11:     }
yading@11: 
yading@11: finish:
yading@11:     av_freep(&times);
yading@11:     av_freep(&filepositions);
yading@11:     avio_seek(ioc, initial_pos, SEEK_SET);
yading@11:     return ret;
yading@11: }
yading@11: 
yading@11: static int amf_parse_object(AVFormatContext *s, AVStream *astream, AVStream *vstream, const char *key, int64_t max_pos, int depth) {
yading@11:     AVCodecContext *acodec, *vcodec;
yading@11:     FLVContext *flv = s->priv_data;
yading@11:     AVIOContext *ioc;
yading@11:     AMFDataType amf_type;
yading@11:     char str_val[256];
yading@11:     double num_val;
yading@11: 
yading@11:     num_val = 0;
yading@11:     ioc = s->pb;
yading@11: 
yading@11:     amf_type = avio_r8(ioc);
yading@11: 
yading@11:     switch(amf_type) {
yading@11:         case AMF_DATA_TYPE_NUMBER:
yading@11:             num_val = av_int2double(avio_rb64(ioc)); break;
yading@11:         case AMF_DATA_TYPE_BOOL:
yading@11:             num_val = avio_r8(ioc); break;
yading@11:         case AMF_DATA_TYPE_STRING:
yading@11:             if(amf_get_string(ioc, str_val, sizeof(str_val)) < 0)
yading@11:                 return -1;
yading@11:             break;
yading@11:         case AMF_DATA_TYPE_OBJECT:
yading@11:             if ((vstream || astream) && ioc->seekable && key && !strcmp(KEYFRAMES_TAG, key) && depth == 1)
yading@11:                 if (parse_keyframes_index(s, ioc, vstream ? vstream : astream,
yading@11:                                           max_pos) < 0)
yading@11:                     av_log(s, AV_LOG_ERROR, "Keyframe index parsing failed\n");
yading@11: 
yading@11:             while (avio_tell(ioc) < max_pos - 2 && amf_get_string(ioc, str_val, sizeof(str_val)) > 0) {
yading@11:                 if (amf_parse_object(s, astream, vstream, str_val, max_pos, depth + 1) < 0)
yading@11:                     return -1; //if we couldn't skip, bomb out.
yading@11:             }
yading@11:             if(avio_r8(ioc) != AMF_END_OF_OBJECT)
yading@11:                 return -1;
yading@11:             break;
yading@11:         case AMF_DATA_TYPE_NULL:
yading@11:         case AMF_DATA_TYPE_UNDEFINED:
yading@11:         case AMF_DATA_TYPE_UNSUPPORTED:
yading@11:             break; //these take up no additional space
yading@11:         case AMF_DATA_TYPE_MIXEDARRAY:
yading@11:             avio_skip(ioc, 4); //skip 32-bit max array index
yading@11:             while(avio_tell(ioc) < max_pos - 2 && amf_get_string(ioc, str_val, sizeof(str_val)) > 0) {
yading@11:                 //this is the only case in which we would want a nested parse to not skip over the object
yading@11:                 if(amf_parse_object(s, astream, vstream, str_val, max_pos, depth + 1) < 0)
yading@11:                     return -1;
yading@11:             }
yading@11:             if(avio_r8(ioc) != AMF_END_OF_OBJECT)
yading@11:                 return -1;
yading@11:             break;
yading@11:         case AMF_DATA_TYPE_ARRAY: {
yading@11:             unsigned int arraylen, i;
yading@11: 
yading@11:             arraylen = avio_rb32(ioc);
yading@11:             for(i = 0; i < arraylen && avio_tell(ioc) < max_pos - 1; i++) {
yading@11:                 if(amf_parse_object(s, NULL, NULL, NULL, max_pos, depth + 1) < 0)
yading@11:                     return -1; //if we couldn't skip, bomb out.
yading@11:             }
yading@11:         }
yading@11:             break;
yading@11:         case AMF_DATA_TYPE_DATE:
yading@11:             avio_skip(ioc, 8 + 2); //timestamp (double) and UTC offset (int16)
yading@11:             break;
yading@11:         default: //unsupported type, we couldn't skip
yading@11:             return -1;
yading@11:     }
yading@11: 
yading@11:     if(depth == 1 && key) { //only look for metadata values when we are not nested and key != NULL
yading@11:         acodec = astream ? astream->codec : NULL;
yading@11:         vcodec = vstream ? vstream->codec : NULL;
yading@11: 
yading@11:         if (amf_type == AMF_DATA_TYPE_NUMBER || amf_type == AMF_DATA_TYPE_BOOL) {
yading@11:             if (!strcmp(key, "duration"))
yading@11:                 s->duration = num_val * AV_TIME_BASE;
yading@11:             else if (!strcmp(key, "videodatarate") && vcodec && 0 <= (int)(num_val * 1024.0))
yading@11:                 vcodec->bit_rate = num_val * 1024.0;
yading@11:             else if (!strcmp(key, "audiodatarate") && acodec && 0 <= (int)(num_val * 1024.0))
yading@11:                 acodec->bit_rate = num_val * 1024.0;
yading@11:             else if (!strcmp(key, "datastream")) {
yading@11:                 AVStream *st = create_stream(s, AVMEDIA_TYPE_DATA);
yading@11:                 if (!st)
yading@11:                     return AVERROR(ENOMEM);
yading@11:                 st->codec->codec_id = AV_CODEC_ID_TEXT;
yading@11:             } else if (flv->trust_metadata) {
yading@11:                 if (!strcmp(key, "videocodecid") && vcodec) {
yading@11:                     flv_set_video_codec(s, vstream, num_val, 0);
yading@11:                 } else
yading@11:                 if (!strcmp(key, "audiocodecid") && acodec) {
yading@11:                     int id = ((int)num_val) << FLV_AUDIO_CODECID_OFFSET;
yading@11:                     flv_set_audio_codec(s, astream, acodec, id);
yading@11:                 } else
yading@11:                 if (!strcmp(key, "audiosamplerate") && acodec) {
yading@11:                     acodec->sample_rate = num_val;
yading@11:                 } else if (!strcmp(key, "audiosamplesize") && acodec) {
yading@11:                     acodec->bits_per_coded_sample = num_val;
yading@11:                 } else if (!strcmp(key, "stereo") && acodec) {
yading@11:                     acodec->channels = num_val + 1;
yading@11:                     acodec->channel_layout = acodec->channels == 2 ?
yading@11:                                              AV_CH_LAYOUT_STEREO :
yading@11:                                              AV_CH_LAYOUT_MONO;
yading@11:                 } else
yading@11:                 if (!strcmp(key, "width") && vcodec) {
yading@11:                     vcodec->width = num_val;
yading@11:                 } else
yading@11:                 if (!strcmp(key, "height") && vcodec) {
yading@11:                     vcodec->height = num_val;
yading@11:                 }
yading@11:             }
yading@11:         }
yading@11: 
yading@11:         if (amf_type == AMF_DATA_TYPE_OBJECT && s->nb_streams == 1 &&
yading@11:            ((!acodec && !strcmp(key, "audiocodecid")) ||
yading@11:             (!vcodec && !strcmp(key, "videocodecid"))))
yading@11:                 s->ctx_flags &= ~AVFMTCTX_NOHEADER; //If there is either audio/video missing, codecid will be an empty object
yading@11: 
yading@11:         if (!strcmp(key, "duration")        ||
yading@11:             !strcmp(key, "filesize")        ||
yading@11:             !strcmp(key, "width")           ||
yading@11:             !strcmp(key, "height")          ||
yading@11:             !strcmp(key, "videodatarate")   ||
yading@11:             !strcmp(key, "framerate")       ||
yading@11:             !strcmp(key, "videocodecid")    ||
yading@11:             !strcmp(key, "audiodatarate")   ||
yading@11:             !strcmp(key, "audiosamplerate") ||
yading@11:             !strcmp(key, "audiosamplesize") ||
yading@11:             !strcmp(key, "stereo")          ||
yading@11:             !strcmp(key, "audiocodecid"))
yading@11:             return 0;
yading@11: 
yading@11:         if(amf_type == AMF_DATA_TYPE_BOOL) {
yading@11:             av_strlcpy(str_val, num_val > 0 ? "true" : "false", sizeof(str_val));
yading@11:             av_dict_set(&s->metadata, key, str_val, 0);
yading@11:         } else if(amf_type == AMF_DATA_TYPE_NUMBER) {
yading@11:             snprintf(str_val, sizeof(str_val), "%.f", num_val);
yading@11:             av_dict_set(&s->metadata, key, str_val, 0);
yading@11:         } else if (amf_type == AMF_DATA_TYPE_STRING)
yading@11:             av_dict_set(&s->metadata, key, str_val, 0);
yading@11:     }
yading@11: 
yading@11:     return 0;
yading@11: }
yading@11: 
yading@11: static int flv_read_metabody(AVFormatContext *s, int64_t next_pos) {
yading@11:     AMFDataType type;
yading@11:     AVStream *stream, *astream, *vstream, *dstream;
yading@11:     AVIOContext *ioc;
yading@11:     int i;
yading@11:     char buffer[11]; //only needs to hold the string "onMetaData". Anything longer is something we don't want.
yading@11: 
yading@11:     vstream = astream = dstream = NULL;
yading@11:     ioc = s->pb;
yading@11: 
yading@11:     //first object needs to be "onMetaData" string
yading@11:     type = avio_r8(ioc);
yading@11:     if (type != AMF_DATA_TYPE_STRING ||
yading@11:         amf_get_string(ioc, buffer, sizeof(buffer)) < 0)
yading@11:         return -1;
yading@11: 
yading@11:     if (!strcmp(buffer, "onTextData"))
yading@11:         return 1;
yading@11: 
yading@11:     if (strcmp(buffer, "onMetaData"))
yading@11:         return -1;
yading@11: 
yading@11:     //find the streams now so that amf_parse_object doesn't need to do the lookup every time it is called.
yading@11:     for(i = 0; i < s->nb_streams; i++) {
yading@11:         stream = s->streams[i];
yading@11:         if(stream->codec->codec_type == AVMEDIA_TYPE_VIDEO) vstream = stream;
yading@11:         else if(stream->codec->codec_type == AVMEDIA_TYPE_AUDIO) astream = stream;
yading@11:         else if(stream->codec->codec_type == AVMEDIA_TYPE_DATA) dstream = stream;
yading@11:     }
yading@11: 
yading@11:     //parse the second object (we want a mixed array)
yading@11:     if(amf_parse_object(s, astream, vstream, buffer, next_pos, 0) < 0)
yading@11:         return -1;
yading@11: 
yading@11:     return 0;
yading@11: }
yading@11: 
yading@11: static int flv_read_header(AVFormatContext *s)
yading@11: {
yading@11:     int offset, flags;
yading@11: 
yading@11:     avio_skip(s->pb, 4);
yading@11:     flags = avio_r8(s->pb);
yading@11:     /* old flvtool cleared this field */
yading@11:     /* FIXME: better fix needed */
yading@11:     if (!flags) {
yading@11:         flags = FLV_HEADER_FLAG_HASVIDEO | FLV_HEADER_FLAG_HASAUDIO;
yading@11:         av_log(s, AV_LOG_WARNING, "Broken FLV file, which says no streams present, this might fail\n");
yading@11:     }
yading@11: 
yading@11:     s->ctx_flags |= AVFMTCTX_NOHEADER;
yading@11: 
yading@11:     if(flags & FLV_HEADER_FLAG_HASVIDEO){
yading@11:         if(!create_stream(s, AVMEDIA_TYPE_VIDEO))
yading@11:             return AVERROR(ENOMEM);
yading@11:     }
yading@11:     if(flags & FLV_HEADER_FLAG_HASAUDIO){
yading@11:         if(!create_stream(s, AVMEDIA_TYPE_AUDIO))
yading@11:             return AVERROR(ENOMEM);
yading@11:     }
yading@11:     // Flag doesn't indicate whether or not there is script-data present. Must
yading@11:     // create that stream if it's encountered.
yading@11: 
yading@11:     offset = avio_rb32(s->pb);
yading@11:     avio_seek(s->pb, offset, SEEK_SET);
yading@11:     avio_skip(s->pb, 4);
yading@11: 
yading@11:     s->start_time = 0;
yading@11: 
yading@11:     return 0;
yading@11: }
yading@11: 
yading@11: static int flv_read_close(AVFormatContext *s)
yading@11: {
yading@11:     int i;
yading@11:     FLVContext *flv = s->priv_data;
yading@11:     for(i=0; i<FLV_STREAM_TYPE_NB; i++)
yading@11:         av_freep(&flv->new_extradata[i]);
yading@11:     return 0;
yading@11: }
yading@11: 
yading@11: static int flv_get_extradata(AVFormatContext *s, AVStream *st, int size)
yading@11: {
yading@11:     av_free(st->codec->extradata);
yading@11:     st->codec->extradata = av_mallocz(size + FF_INPUT_BUFFER_PADDING_SIZE);
yading@11:     if (!st->codec->extradata)
yading@11:         return AVERROR(ENOMEM);
yading@11:     st->codec->extradata_size = size;
yading@11:     avio_read(s->pb, st->codec->extradata, st->codec->extradata_size);
yading@11:     return 0;
yading@11: }
yading@11: 
yading@11: static int flv_queue_extradata(FLVContext *flv, AVIOContext *pb, int stream,
yading@11:                                int size)
yading@11: {
yading@11:     av_free(flv->new_extradata[stream]);
yading@11:     flv->new_extradata[stream] = av_mallocz(size + FF_INPUT_BUFFER_PADDING_SIZE);
yading@11:     if (!flv->new_extradata[stream])
yading@11:         return AVERROR(ENOMEM);
yading@11:     flv->new_extradata_size[stream] = size;
yading@11:     avio_read(pb, flv->new_extradata[stream], size);
yading@11:     return 0;
yading@11: }
yading@11: 
yading@11: static void clear_index_entries(AVFormatContext *s, int64_t pos)
yading@11: {
yading@11:     int i, j, out;
yading@11:     av_log(s, AV_LOG_WARNING, "Found invalid index entries, clearing the index.\n");
yading@11:     for (i = 0; i < s->nb_streams; i++) {
yading@11:         AVStream *st = s->streams[i];
yading@11:         /* Remove all index entries that point to >= pos */
yading@11:         out = 0;
yading@11:         for (j = 0; j < st->nb_index_entries; j++) {
yading@11:             if (st->index_entries[j].pos < pos)
yading@11:                 st->index_entries[out++] = st->index_entries[j];
yading@11:         }
yading@11:         st->nb_index_entries = out;
yading@11:     }
yading@11: }
yading@11: 
yading@11: 
yading@11: static int flv_data_packet(AVFormatContext *s, AVPacket *pkt,
yading@11:                            int64_t dts, int64_t next)
yading@11: {
yading@11:     int ret = AVERROR_INVALIDDATA, i;
yading@11:     AVIOContext *pb = s->pb;
yading@11:     AVStream *st = NULL;
yading@11:     AMFDataType type;
yading@11:     char buf[20];
yading@11:     int length;
yading@11: 
yading@11:     type = avio_r8(pb);
yading@11:     if (type == AMF_DATA_TYPE_MIXEDARRAY)
yading@11:         avio_seek(pb, 4, SEEK_CUR);
yading@11:     else if (type != AMF_DATA_TYPE_OBJECT)
yading@11:         goto out;
yading@11: 
yading@11:     amf_get_string(pb, buf, sizeof(buf));
yading@11:     if (strcmp(buf, "type") || avio_r8(pb) != AMF_DATA_TYPE_STRING)
yading@11:         goto out;
yading@11: 
yading@11:     amf_get_string(pb, buf, sizeof(buf));
yading@11:     //FIXME parse it as codec_id
yading@11:     amf_get_string(pb, buf, sizeof(buf));
yading@11:     if (strcmp(buf, "text") || avio_r8(pb) != AMF_DATA_TYPE_STRING)
yading@11:         goto out;
yading@11: 
yading@11:     length = avio_rb16(pb);
yading@11:     ret = av_get_packet(s->pb, pkt, length);
yading@11:     if (ret < 0) {
yading@11:         ret = AVERROR(EIO);
yading@11:         goto out;
yading@11:     }
yading@11: 
yading@11:     for (i = 0; i < s->nb_streams; i++) {
yading@11:         st = s->streams[i];
yading@11:         if (st->codec->codec_type == AVMEDIA_TYPE_DATA)
yading@11:             break;
yading@11:     }
yading@11: 
yading@11:     if (i == s->nb_streams) {
yading@11:         st = create_stream(s, AVMEDIA_TYPE_DATA);
yading@11:         if (!st)
yading@11:             goto out;
yading@11:         st->codec->codec_id = AV_CODEC_ID_TEXT;
yading@11:     }
yading@11: 
yading@11:     pkt->dts  = dts;
yading@11:     pkt->pts  = dts;
yading@11:     pkt->size = ret;
yading@11: 
yading@11:     pkt->stream_index = st->index;
yading@11:     pkt->flags |= AV_PKT_FLAG_KEY;
yading@11: 
yading@11:     avio_seek(s->pb, next + 4, SEEK_SET);
yading@11: out:
yading@11:     return ret;
yading@11: }
yading@11: 
yading@11: static int flv_read_packet(AVFormatContext *s, AVPacket *pkt)
yading@11: {
yading@11:     FLVContext *flv = s->priv_data;
yading@11:     int ret, i, type, size, flags;
yading@11:     int stream_type=-1;
yading@11:     int64_t next, pos;
yading@11:     int64_t dts, pts = AV_NOPTS_VALUE;
yading@11:     int av_uninit(channels);
yading@11:     int av_uninit(sample_rate);
yading@11:     AVStream *st = NULL;
yading@11: 
yading@11:  for(;;avio_skip(s->pb, 4)){ /* pkt size is repeated at end. skip it */
yading@11:     pos = avio_tell(s->pb);
yading@11:     type = avio_r8(s->pb);
yading@11:     size = avio_rb24(s->pb);
yading@11:     dts = avio_rb24(s->pb);
yading@11:     dts |= avio_r8(s->pb) << 24;
yading@11:     av_dlog(s, "type:%d, size:%d, dts:%"PRId64"\n", type, size, dts);
yading@11:     if (url_feof(s->pb))
yading@11:         return AVERROR_EOF;
yading@11:     avio_skip(s->pb, 3); /* stream id, always 0 */
yading@11:     flags = 0;
yading@11: 
yading@11:     if (flv->validate_next < flv->validate_count) {
yading@11:         int64_t validate_pos = flv->validate_index[flv->validate_next].pos;
yading@11:         if (pos == validate_pos) {
yading@11:             if (FFABS(dts - flv->validate_index[flv->validate_next].dts) <=
yading@11:                 VALIDATE_INDEX_TS_THRESH) {
yading@11:                 flv->validate_next++;
yading@11:             } else {
yading@11:                 clear_index_entries(s, validate_pos);
yading@11:                 flv->validate_count = 0;
yading@11:             }
yading@11:         } else if (pos > validate_pos) {
yading@11:             clear_index_entries(s, validate_pos);
yading@11:             flv->validate_count = 0;
yading@11:         }
yading@11:     }
yading@11: 
yading@11:     if(size == 0)
yading@11:         continue;
yading@11: 
yading@11:     next= size + avio_tell(s->pb);
yading@11: 
yading@11:     if (type == FLV_TAG_TYPE_AUDIO) {
yading@11:         stream_type=FLV_STREAM_TYPE_AUDIO;
yading@11:         flags = avio_r8(s->pb);
yading@11:         size--;
yading@11:     } else if (type == FLV_TAG_TYPE_VIDEO) {
yading@11:         stream_type=FLV_STREAM_TYPE_VIDEO;
yading@11:         flags = avio_r8(s->pb);
yading@11:         size--;
yading@11:         if ((flags & FLV_VIDEO_FRAMETYPE_MASK) == FLV_FRAME_VIDEO_INFO_CMD)
yading@11:             goto skip;
yading@11:     } else if (type == FLV_TAG_TYPE_META) {
yading@11:         if (size > 13+1+4 && dts == 0) { // Header-type metadata stuff
yading@11:             flv_read_metabody(s, next);
yading@11:             goto skip;
yading@11:         } else if (dts != 0) { // Script-data "special" metadata frames - don't skip
yading@11:             stream_type=FLV_STREAM_TYPE_DATA;
yading@11:         } else {
yading@11:             goto skip;
yading@11:         }
yading@11:     } else {
yading@11:         av_log(s, AV_LOG_DEBUG, "skipping flv packet: type %d, size %d, flags %d\n", type, size, flags);
yading@11:     skip:
yading@11:         avio_seek(s->pb, next, SEEK_SET);
yading@11:         continue;
yading@11:     }
yading@11: 
yading@11:     /* skip empty data packets */
yading@11:     if (!size)
yading@11:         continue;
yading@11: 
yading@11:     /* now find stream */
yading@11:     for(i=0;i<s->nb_streams;i++) {
yading@11:         st = s->streams[i];
yading@11:         if (stream_type == FLV_STREAM_TYPE_AUDIO) {
yading@11:             if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO &&
yading@11:                 (s->audio_codec_id || flv_same_audio_codec(st->codec, flags))) {
yading@11:                 break;
yading@11:             }
yading@11:         } else
yading@11:         if (stream_type == FLV_STREAM_TYPE_VIDEO) {
yading@11:             if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO &&
yading@11:                 (s->video_codec_id || flv_same_video_codec(st->codec, flags))) {
yading@11:                 break;
yading@11:             }
yading@11:         } else if (stream_type == FLV_STREAM_TYPE_DATA) {
yading@11:             if (st->codec->codec_type == AVMEDIA_TYPE_DATA)
yading@11:                 break;
yading@11:         }
yading@11:     }
yading@11:     if(i == s->nb_streams){
yading@11:         static const enum AVMediaType stream_types[] = {AVMEDIA_TYPE_VIDEO, AVMEDIA_TYPE_AUDIO, AVMEDIA_TYPE_DATA};
yading@11:         av_log(s, AV_LOG_WARNING, "Stream discovered after head already parsed\n");
yading@11:         st = create_stream(s,
yading@11:                            stream_types[stream_type]);
yading@11:         if (!st)
yading@11:             return AVERROR(ENOMEM);
yading@11: 
yading@11:     }
yading@11:     av_dlog(s, "%d %X %d \n", stream_type, flags, st->discard);
yading@11:     if(  (st->discard >= AVDISCARD_NONKEY && !((flags & FLV_VIDEO_FRAMETYPE_MASK) == FLV_FRAME_KEY || (stream_type == FLV_STREAM_TYPE_AUDIO)))
yading@11:        ||(st->discard >= AVDISCARD_BIDIR  &&  ((flags & FLV_VIDEO_FRAMETYPE_MASK) == FLV_FRAME_DISP_INTER && (stream_type == FLV_STREAM_TYPE_VIDEO)))
yading@11:        || st->discard >= AVDISCARD_ALL
yading@11:        ){
yading@11:         avio_seek(s->pb, next, SEEK_SET);
yading@11:         continue;
yading@11:     }
yading@11:     if ((flags & FLV_VIDEO_FRAMETYPE_MASK) == FLV_FRAME_KEY || stream_type == FLV_STREAM_TYPE_AUDIO)
yading@11:         av_add_index_entry(st, pos, dts, size, 0, AVINDEX_KEYFRAME);
yading@11:     break;
yading@11:  }
yading@11: 
yading@11:     // if not streamed and no duration from metadata then seek to end to find the duration from the timestamps
yading@11:     if(s->pb->seekable && (!s->duration || s->duration==AV_NOPTS_VALUE) && !flv->searched_for_end){
yading@11:         int size;
yading@11:         const int64_t pos= avio_tell(s->pb);
yading@11:         int64_t fsize= avio_size(s->pb);
yading@11: retry_duration:
yading@11:         avio_seek(s->pb, fsize-4, SEEK_SET);
yading@11:         size= avio_rb32(s->pb);
yading@11:         avio_seek(s->pb, fsize-3-size, SEEK_SET);
yading@11:         if(size == avio_rb24(s->pb) + 11){
yading@11:             uint32_t ts = avio_rb24(s->pb);
yading@11:             ts |= avio_r8(s->pb) << 24;
yading@11:             if(ts)
yading@11:                 s->duration = ts * (int64_t)AV_TIME_BASE / 1000;
yading@11:             else if (fsize >= 8 && fsize - 8 >= size){
yading@11:                 fsize -= size+4;
yading@11:                 goto retry_duration;
yading@11:             }
yading@11:         }
yading@11: 
yading@11:         avio_seek(s->pb, pos, SEEK_SET);
yading@11:         flv->searched_for_end = 1;
yading@11:     }
yading@11: 
yading@11:     if(stream_type == FLV_STREAM_TYPE_AUDIO){
yading@11:         int bits_per_coded_sample;
yading@11:         channels    = (flags & FLV_AUDIO_CHANNEL_MASK) == FLV_STEREO ? 2 : 1;
yading@11:         sample_rate = (44100 << ((flags & FLV_AUDIO_SAMPLERATE_MASK) >> FLV_AUDIO_SAMPLERATE_OFFSET) >> 3);
yading@11:         bits_per_coded_sample = (flags & FLV_AUDIO_SAMPLESIZE_MASK) ? 16 : 8;
yading@11:         if(!st->codec->channels || !st->codec->sample_rate || !st->codec->bits_per_coded_sample) {
yading@11:             st->codec->channels              = channels;
yading@11:             st->codec->channel_layout        = channels == 1 ? AV_CH_LAYOUT_MONO :
yading@11:                                                                AV_CH_LAYOUT_STEREO;
yading@11:             st->codec->sample_rate           = sample_rate;
yading@11:             st->codec->bits_per_coded_sample = bits_per_coded_sample;
yading@11:         }
yading@11:         if(!st->codec->codec_id){
yading@11:             flv_set_audio_codec(s, st, st->codec, flags & FLV_AUDIO_CODECID_MASK);
yading@11:             flv->last_sample_rate = sample_rate = st->codec->sample_rate;
yading@11:             flv->last_channels    = channels    = st->codec->channels;
yading@11:         } else {
yading@11:             AVCodecContext ctx;
yading@11:             ctx.sample_rate = sample_rate;
yading@11:             flv_set_audio_codec(s, st, &ctx, flags & FLV_AUDIO_CODECID_MASK);
yading@11:             sample_rate = ctx.sample_rate;
yading@11:         }
yading@11:     } else if(stream_type == FLV_STREAM_TYPE_VIDEO) {
yading@11:         size -= flv_set_video_codec(s, st, flags & FLV_VIDEO_CODECID_MASK, 1);
yading@11:     }
yading@11: 
yading@11:     if (st->codec->codec_id == AV_CODEC_ID_AAC ||
yading@11:         st->codec->codec_id == AV_CODEC_ID_H264 ||
yading@11:         st->codec->codec_id == AV_CODEC_ID_MPEG4) {
yading@11:         int type = avio_r8(s->pb);
yading@11:         size--;
yading@11:         if (st->codec->codec_id == AV_CODEC_ID_H264 || st->codec->codec_id == AV_CODEC_ID_MPEG4) {
yading@11:             int32_t cts = (avio_rb24(s->pb)+0xff800000)^0xff800000; // sign extension
yading@11:             pts = dts + cts;
yading@11:             if (cts < 0) { // dts are wrong
yading@11:                 flv->wrong_dts = 1;
yading@11:                 av_log(s, AV_LOG_WARNING, "negative cts, previous timestamps might be wrong\n");
yading@11:             }
yading@11:             if (flv->wrong_dts)
yading@11:                 dts = AV_NOPTS_VALUE;
yading@11:         }
yading@11:         if (type == 0 && (!st->codec->extradata || st->codec->codec_id == AV_CODEC_ID_AAC)) {
yading@11:             if (st->codec->extradata) {
yading@11:                 if ((ret = flv_queue_extradata(flv, s->pb, stream_type, size)) < 0)
yading@11:                     return ret;
yading@11:                 ret = AVERROR(EAGAIN);
yading@11:                 goto leave;
yading@11:             }
yading@11:             if ((ret = flv_get_extradata(s, st, size)) < 0)
yading@11:                 return ret;
yading@11:             if (st->codec->codec_id == AV_CODEC_ID_AAC && 0) {
yading@11:                 MPEG4AudioConfig cfg;
yading@11:                 if (avpriv_mpeg4audio_get_config(&cfg, st->codec->extradata,
yading@11:                                              st->codec->extradata_size * 8, 1) >= 0) {
yading@11:                 st->codec->channels = cfg.channels;
yading@11:                 st->codec->channel_layout = 0;
yading@11:                 if (cfg.ext_sample_rate)
yading@11:                     st->codec->sample_rate = cfg.ext_sample_rate;
yading@11:                 else
yading@11:                     st->codec->sample_rate = cfg.sample_rate;
yading@11:                 av_dlog(s, "mp4a config channels %d sample rate %d\n",
yading@11:                         st->codec->channels, st->codec->sample_rate);
yading@11:                 }
yading@11:             }
yading@11: 
yading@11:             ret = AVERROR(EAGAIN);
yading@11:             goto leave;
yading@11:         }
yading@11:     }
yading@11: 
yading@11:     /* skip empty data packets */
yading@11:     if (!size) {
yading@11:         ret = AVERROR(EAGAIN);
yading@11:         goto leave;
yading@11:     }
yading@11: 
yading@11:     ret= av_get_packet(s->pb, pkt, size);
yading@11:     if (ret < 0)
yading@11:         return ret;
yading@11:     pkt->dts = dts;
yading@11:     pkt->pts = pts == AV_NOPTS_VALUE ? dts : pts;
yading@11:     pkt->stream_index = st->index;
yading@11:     if (flv->new_extradata[stream_type]) {
yading@11:         uint8_t *side = av_packet_new_side_data(pkt, AV_PKT_DATA_NEW_EXTRADATA,
yading@11:                                                 flv->new_extradata_size[stream_type]);
yading@11:         if (side) {
yading@11:             memcpy(side, flv->new_extradata[stream_type],
yading@11:                    flv->new_extradata_size[stream_type]);
yading@11:             av_freep(&flv->new_extradata[stream_type]);
yading@11:             flv->new_extradata_size[stream_type] = 0;
yading@11:         }
yading@11:     }
yading@11:     if (stream_type == FLV_STREAM_TYPE_AUDIO && (sample_rate != flv->last_sample_rate ||
yading@11:                      channels != flv->last_channels)) {
yading@11:         flv->last_sample_rate = sample_rate;
yading@11:         flv->last_channels    = channels;
yading@11:         ff_add_param_change(pkt, channels, 0, sample_rate, 0, 0);
yading@11:     }
yading@11: 
yading@11:     if (    stream_type == FLV_STREAM_TYPE_AUDIO ||
yading@11:             ((flags & FLV_VIDEO_FRAMETYPE_MASK) == FLV_FRAME_KEY) ||
yading@11:             stream_type == FLV_STREAM_TYPE_DATA)
yading@11:         pkt->flags |= AV_PKT_FLAG_KEY;
yading@11: 
yading@11: leave:
yading@11:     avio_skip(s->pb, 4);
yading@11:     return ret;
yading@11: }
yading@11: 
yading@11: static int flv_read_seek(AVFormatContext *s, int stream_index,
yading@11:     int64_t ts, int flags)
yading@11: {
yading@11:     FLVContext *flv = s->priv_data;
yading@11:     flv->validate_count = 0;
yading@11:     return avio_seek_time(s->pb, stream_index, ts, flags);
yading@11: }
yading@11: 
yading@11: #define OFFSET(x) offsetof(FLVContext, x)
yading@11: #define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
yading@11: static const AVOption options[] = {
yading@11:     { "flv_metadata", "Allocate streams according the onMetaData array",      OFFSET(trust_metadata), AV_OPT_TYPE_INT,    { .i64 = 0 }, 0, 1, VD},
yading@11:     { NULL }
yading@11: };
yading@11: 
yading@11: static const AVClass class = {
yading@11:     .class_name = "flvdec",
yading@11:     .item_name  = av_default_item_name,
yading@11:     .option     = options,
yading@11:     .version    = LIBAVUTIL_VERSION_INT,
yading@11: };
yading@11: 
yading@11: AVInputFormat ff_flv_demuxer = {
yading@11:     .name           = "flv",
yading@11:     .long_name      = NULL_IF_CONFIG_SMALL("FLV (Flash Video)"),
yading@11:     .priv_data_size = sizeof(FLVContext),
yading@11:     .read_probe     = flv_probe,
yading@11:     .read_header    = flv_read_header,
yading@11:     .read_packet    = flv_read_packet,
yading@11:     .read_seek      = flv_read_seek,
yading@11:     .read_close     = flv_read_close,
yading@11:     .extensions     = "flv",
yading@11:     .priv_class     = &class,
yading@11: };