static int thp_read_header(AVFormatContext *s, AVFormatParameters *ap) { ThpDemuxContext *thp = s->priv_data; AVStream *st; AVIOContext *pb = s->pb; int i; /* Read the file header. */ avio_rb32(pb); /* Skip Magic. */ thp->version = avio_rb32(pb); avio_rb32(pb); /* Max buf size. */ avio_rb32(pb); /* Max samples. */ thp->fps = av_d2q(av_int2float(avio_rb32(pb)), INT_MAX); thp->framecnt = avio_rb32(pb); thp->first_framesz = avio_rb32(pb); avio_rb32(pb); /* Data size. */ thp->compoff = avio_rb32(pb); avio_rb32(pb); /* offsetDataOffset. */ thp->first_frame = avio_rb32(pb); thp->last_frame = avio_rb32(pb); thp->next_framesz = thp->first_framesz; thp->next_frame = thp->first_frame; /* Read the component structure. */ avio_seek (pb, thp->compoff, SEEK_SET); thp->compcount = avio_rb32(pb); /* Read the list of component types. */ avio_read(pb, thp->components, 16); for (i = 0; i < thp->compcount; i++) { if (thp->components[i] == 0) { if (thp->vst != 0) break; /* Video component. */ st = avformat_new_stream(s, NULL); if (!st) return AVERROR(ENOMEM); /* The denominator and numerator are switched because 1/fps is required. */ avpriv_set_pts_info(st, 64, thp->fps.den, thp->fps.num); st->codec->codec_type = AVMEDIA_TYPE_VIDEO; st->codec->codec_id = CODEC_ID_THP; st->codec->codec_tag = 0; /* no fourcc */ st->codec->width = avio_rb32(pb); st->codec->height = avio_rb32(pb); st->codec->sample_rate = av_q2d(thp->fps); thp->vst = st; thp->video_stream_index = st->index; if (thp->version == 0x11000) avio_rb32(pb); /* Unknown. */ } else if (thp->components[i] == 1) { if (thp->has_audio != 0) break; /* Audio component. */ st = avformat_new_stream(s, NULL); if (!st) return AVERROR(ENOMEM); st->codec->codec_type = AVMEDIA_TYPE_AUDIO; st->codec->codec_id = CODEC_ID_ADPCM_THP; st->codec->codec_tag = 0; /* no fourcc */ st->codec->channels = avio_rb32(pb); /* numChannels. */ st->codec->sample_rate = avio_rb32(pb); /* Frequency. */ avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate); thp->audio_stream_index = st->index; thp->has_audio = 1; } } return 0; }