static int ffm_write_header(AVFormatContext *s) { FFMContext *ffm = s->priv_data; AVStream *st; ByteIOContext *pb = s->pb; AVCodecContext *codec; int bit_rate, i; ffm->packet_size = FFM_PACKET_SIZE; /* header */ put_le32(pb, MKTAG('F', 'F', 'M', '1')); put_be32(pb, ffm->packet_size); /* XXX: store write position in other file ? */ put_be64(pb, ffm->packet_size); /* current write position */ put_be32(pb, s->nb_streams); bit_rate = 0; for(i=0;i<s->nb_streams;i++) { st = s->streams[i]; bit_rate += st->codec->bit_rate; } put_be32(pb, bit_rate); /* list of streams */ for(i=0;i<s->nb_streams;i++) { st = s->streams[i]; av_set_pts_info(st, 64, 1, 1000000); codec = st->codec; /* generic info */ put_be32(pb, codec->codec_id); put_byte(pb, codec->codec_type); put_be32(pb, codec->bit_rate); put_be32(pb, st->quality); put_be32(pb, codec->flags); put_be32(pb, codec->flags2); put_be32(pb, codec->debug); /* specific info */ switch(codec->codec_type) { case CODEC_TYPE_VIDEO: put_be32(pb, codec->time_base.num); put_be32(pb, codec->time_base.den); put_be16(pb, codec->width); put_be16(pb, codec->height); put_be16(pb, codec->gop_size); put_be32(pb, codec->pix_fmt); put_byte(pb, codec->qmin); put_byte(pb, codec->qmax); put_byte(pb, codec->max_qdiff); put_be16(pb, (int) (codec->qcompress * 10000.0)); put_be16(pb, (int) (codec->qblur * 10000.0)); put_be32(pb, codec->bit_rate_tolerance); put_strz(pb, codec->rc_eq); put_be32(pb, codec->rc_max_rate); put_be32(pb, codec->rc_min_rate); put_be32(pb, codec->rc_buffer_size); put_be64(pb, av_dbl2int(codec->i_quant_factor)); put_be64(pb, av_dbl2int(codec->b_quant_factor)); put_be64(pb, av_dbl2int(codec->i_quant_offset)); put_be64(pb, av_dbl2int(codec->b_quant_offset)); put_be32(pb, codec->dct_algo); put_be32(pb, codec->strict_std_compliance); put_be32(pb, codec->max_b_frames); put_be32(pb, codec->luma_elim_threshold); put_be32(pb, codec->chroma_elim_threshold); put_be32(pb, codec->mpeg_quant); put_be32(pb, codec->intra_dc_precision); put_be32(pb, codec->me_method); put_be32(pb, codec->mb_decision); put_be32(pb, codec->nsse_weight); put_be32(pb, codec->frame_skip_cmp); put_be64(pb, av_dbl2int(codec->rc_buffer_aggressivity)); put_be32(pb, codec->codec_tag); break; case CODEC_TYPE_AUDIO: put_be32(pb, codec->sample_rate); put_le16(pb, codec->channels); put_le16(pb, codec->frame_size); break; default: return -1; } } /* hack to have real time */ if (ffm_nopts) ffm->start_time = 0; else ffm->start_time = av_gettime(); /* flush until end of block reached */ while ((url_ftell(pb) % ffm->packet_size) != 0) put_byte(pb, 0); put_flush_packet(pb); /* init packet mux */ ffm->packet_ptr = ffm->packet; ffm->packet_end = ffm->packet + ffm->packet_size - FFM_HEADER_SIZE; assert(ffm->packet_end >= ffm->packet); ffm->frame_offset = 0; ffm->pts = 0; ffm->first_packet = 1; return 0; }