static int ivr_read_header(AVFormatContext *s) { unsigned tag, type, len, tlen, value; int i, j, n, count, nb_streams, ret; uint8_t key[256], val[256]; AVIOContext *pb = s->pb; AVStream *st; int64_t pos, offset, temp; pos = avio_tell(pb); tag = avio_rl32(pb); if (tag == MKTAG('.','R','1','M')) { if (avio_rb16(pb) != 1) return AVERROR_INVALIDDATA; if (avio_r8(pb) != 1) return AVERROR_INVALIDDATA; len = avio_rb32(pb); avio_skip(pb, len); avio_skip(pb, 5); temp = avio_rb64(pb); while (!avio_feof(pb) && temp) { offset = temp; temp = avio_rb64(pb); } avio_skip(pb, offset - avio_tell(pb)); if (avio_r8(pb) != 1) return AVERROR_INVALIDDATA; len = avio_rb32(pb); avio_skip(pb, len); if (avio_r8(pb) != 2) return AVERROR_INVALIDDATA; avio_skip(pb, 16); pos = avio_tell(pb); tag = avio_rl32(pb); } if (tag != MKTAG('.','R','E','C')) return AVERROR_INVALIDDATA; if (avio_r8(pb) != 0) return AVERROR_INVALIDDATA; count = avio_rb32(pb); for (i = 0; i < count; i++) { if (avio_feof(pb)) return AVERROR_INVALIDDATA; type = avio_r8(pb); tlen = avio_rb32(pb); avio_get_str(pb, tlen, key, sizeof(key)); len = avio_rb32(pb); if (type == 5) { avio_get_str(pb, len, val, sizeof(val)); av_log(s, AV_LOG_DEBUG, "%s = '%s'\n", key, val); } else if (type == 4) { av_log(s, AV_LOG_DEBUG, "%s = '0x", key); for (j = 0; j < len; j++) av_log(s, AV_LOG_DEBUG, "%X", avio_r8(pb)); av_log(s, AV_LOG_DEBUG, "'\n"); } else if (len == 4 && type == 3 && !strncmp(key, "StreamCount", tlen)) { nb_streams = value = avio_rb32(pb); } else if (len == 4 && type == 3) { value = avio_rb32(pb); av_log(s, AV_LOG_DEBUG, "%s = %d\n", key, value); } else { av_log(s, AV_LOG_DEBUG, "Skipping unsupported key: %s\n", key); avio_skip(pb, len); } } for (n = 0; n < nb_streams; n++) { st = avformat_new_stream(s, NULL); if (!st) return AVERROR(ENOMEM); st->priv_data = ff_rm_alloc_rmstream(); if (!st->priv_data) return AVERROR(ENOMEM); if (avio_r8(pb) != 1) return AVERROR_INVALIDDATA; count = avio_rb32(pb); for (i = 0; i < count; i++) { if (avio_feof(pb)) return AVERROR_INVALIDDATA; type = avio_r8(pb); tlen = avio_rb32(pb); avio_get_str(pb, tlen, key, sizeof(key)); len = avio_rb32(pb); if (type == 5) { avio_get_str(pb, len, val, sizeof(val)); av_log(s, AV_LOG_DEBUG, "%s = '%s'\n", key, val); } else if (type == 4 && !strncmp(key, "OpaqueData", tlen)) { ret = ffio_ensure_seekback(pb, 4); if (ret < 0) return ret; if (avio_rb32(pb) == MKBETAG('M', 'L', 'T', 'I')) { ret = rm_read_multi(s, pb, st, NULL); } else { avio_seek(pb, -4, SEEK_CUR); ret = ff_rm_read_mdpr_codecdata(s, pb, st, st->priv_data, len, NULL); } if (ret < 0) return ret; } else if (type == 4) { int j; av_log(s, AV_LOG_DEBUG, "%s = '0x", key); for (j = 0; j < len; j++) av_log(s, AV_LOG_DEBUG, "%X", avio_r8(pb)); av_log(s, AV_LOG_DEBUG, "'\n"); } else if (len == 4 && type == 3 && !strncmp(key, "Duration", tlen)) { st->duration = avio_rb32(pb); } else if (len == 4 && type == 3) { value = avio_rb32(pb); av_log(s, AV_LOG_DEBUG, "%s = %d\n", key, value); } else { av_log(s, AV_LOG_DEBUG, "Skipping unsupported key: %s\n", key); avio_skip(pb, len); } } } if (avio_r8(pb) != 6) return AVERROR_INVALIDDATA; avio_skip(pb, 12); avio_skip(pb, avio_rb64(pb) + pos - avio_tell(s->pb)); if (avio_r8(pb) != 8) return AVERROR_INVALIDDATA; avio_skip(pb, 8); return 0; }