static int rm_read_header(AVFormatContext *s, AVFormatParameters *ap) { RMContext *rm = s->priv_data; AVStream *st; ByteIOContext *pb = &s->pb; unsigned int tag, v; int tag_size, size, codec_data_size, i; int64_t codec_pos; unsigned int h263_hack_version, start_time, duration; char buf[128]; int flags = 0; tag = get_le32(pb); if (tag == MKTAG('.', 'r', 'a', 0xfd)) { /* very old .ra format */ return rm_read_header_old(s, ap); } else if (tag != MKTAG('.', 'R', 'M', 'F')) { return AVERROR_IO; get_be32(pb); /* header size */ get_be16(pb); get_be32(pb); get_be32(pb); /* number of headers */ for(;;) { if (url_feof(pb)) goto fail; tag = get_le32(pb); tag_size = get_be32(pb); get_be16(pb); #if 0 printf("tag=%c%c%c%c (%08x) size=%d\n", (tag) & 0xff, (tag >> 8) & 0xff, (tag >> 16) & 0xff, (tag >> 24) & 0xff, tag, tag_size); #endif if (tag_size < 10 && tag != MKTAG('D', 'A', 'T', 'A')) goto fail; switch(tag) { case MKTAG('P', 'R', 'O', 'P'): /* file header */ get_be32(pb); /* max bit rate */ get_be32(pb); /* avg bit rate */ get_be32(pb); /* max packet size */ get_be32(pb); /* avg packet size */ get_be32(pb); /* nb packets */ get_be32(pb); /* duration */ get_be32(pb); /* preroll */ get_be32(pb); /* index offset */ get_be32(pb); /* data offset */ get_be16(pb); /* nb streams */ flags = get_be16(pb); /* flags */ break; case MKTAG('C', 'O', 'N', 'T'): get_str(pb, s->title, sizeof(s->title)); get_str(pb, s->author, sizeof(s->author)); get_str(pb, s->copyright, sizeof(s->copyright)); get_str(pb, s->comment, sizeof(s->comment)); break; case MKTAG('M', 'D', 'P', 'R'): st = av_new_stream(s, 0); if (!st) goto fail; st->id = get_be16(pb); get_be32(pb); /* max bit rate */ st->codec->bit_rate = get_be32(pb); /* bit rate */ get_be32(pb); /* max packet size */ get_be32(pb); /* avg packet size */ start_time = get_be32(pb); /* start time */ get_be32(pb); /* preroll */ duration = get_be32(pb); /* duration */ st->start_time = start_time; st->duration = duration; get_str8(pb, buf, sizeof(buf)); /* desc */ get_str8(pb, buf, sizeof(buf)); /* mimetype */ codec_data_size = get_be32(pb); codec_pos = url_ftell(pb); st->codec->codec_type = CODEC_TYPE_DATA; av_set_pts_info(st, 64, 1, 1000); v = get_be32(pb); if (v == MKTAG(0xfd, 'a', 'r', '.')) { /* ra type header */ rm_read_audio_stream_info(s, st, 0); } else { int fps, fps2; if (get_le32(pb) != MKTAG('V', 'I', 'D', 'O')) { fail1: av_log(st->codec, AV_LOG_ERROR, "Unsupported video codec\n"); goto skip; st->codec->codec_tag = get_le32(pb); // av_log(NULL, AV_LOG_DEBUG, "%X %X\n", st->codec->codec_tag, MKTAG('R', 'V', '2', '0')); if ( st->codec->codec_tag != MKTAG('R', 'V', '1', '0') && st->codec->codec_tag != MKTAG('R', 'V', '2', '0') && st->codec->codec_tag != MKTAG('R', 'V', '3', '0') && st->codec->codec_tag != MKTAG('R', 'V', '4', '0')) goto fail1; st->codec->width = get_be16(pb); st->codec->height = get_be16(pb); st->codec->time_base.num= 1; fps= get_be16(pb); st->codec->codec_type = CODEC_TYPE_VIDEO; get_be32(pb); fps2= get_be16(pb); get_be16(pb); st->codec->extradata_size= codec_data_size - (url_ftell(pb) - codec_pos); st->codec->extradata= av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE); get_buffer(pb, st->codec->extradata, st->codec->extradata_size); // av_log(NULL, AV_LOG_DEBUG, "fps= %d fps2= %d\n", fps, fps2); st->codec->time_base.den = fps * st->codec->time_base.num; /* modification of h263 codec version (!) */ #ifdef WORDS_BIGENDIAN h263_hack_version = ((uint32_t*)st->codec->extradata)[1]; #else h263_hack_version = bswap_32(((uint32_t*)st->codec->extradata)[1]); #endif st->codec->sub_id = h263_hack_version; switch((h263_hack_version>>28)){ case 1: st->codec->codec_id = CODEC_ID_RV10; break; case 2: st->codec->codec_id = CODEC_ID_RV20; break; case 3: st->codec->codec_id = CODEC_ID_RV30; break; case 4: st->codec->codec_id = CODEC_ID_RV40; break; default: goto fail1; skip: /* skip codec info */ size = url_ftell(pb) - codec_pos; url_fskip(pb, codec_data_size - size); break; case MKTAG('D', 'A', 'T', 'A'): goto header_end; default: /* unknown tag: skip it */ url_fskip(pb, tag_size - 10); break; header_end: rm->nb_packets = get_be32(pb); /* number of packets */ if (!rm->nb_packets && (flags & 4)) rm->nb_packets = 3600 * 25; get_be32(pb); /* next data header */ return 0; fail: for(i=0;i<s->nb_streams;i++) { av_free(s->streams[i]); return AVERROR_IO;