+ if (ea->sample_rate == -1)
+ ea->sample_rate = revision==3 ? 48000 : 22050;
+
+ return 1;
+}
+
+static int process_video_header_vp6(AVFormatContext *s)
+{
+ EaDemuxContext *ea = s->priv_data;
+ ByteIOContext *pb = &s->pb;
+
+ url_fskip(pb, 16);
+ ea->time_base.den = get_le32(pb);
+ ea->time_base.num = get_le32(pb);
+ ea->video_codec = CODEC_ID_VP6;
+
+ return 1;
+}
+
+/*
+ * Process EA file header
+ * Returns 1 if the EA file is valid and successfully opened, 0 otherwise
+ */
+static int process_ea_header(AVFormatContext *s) {
+ uint32_t blockid, size = 0;
+ EaDemuxContext *ea = s->priv_data;
+ ByteIOContext *pb = &s->pb;
+ int i;
+
+ for (i=0; i<5 && (!ea->audio_codec || !ea->video_codec); i++) {
+ unsigned int startpos = url_ftell(pb);
+ int err = 0;
+
+ blockid = get_le32(pb);
+ size = get_le32(pb);
+ if (i == 0)
+ ea->big_endian = size > 0x000FFFFF;
+ if (ea->big_endian)
+ size = bswap_32(size);
+
+ switch (blockid) {
+ case SCHl_TAG :
+ blockid = get_le32(pb);
+ if (blockid == GSTR_TAG) {
+ url_fskip(pb, 4);
+ } else if (blockid != PT00_TAG) {
+ av_log (s, AV_LOG_ERROR, "unknown SCHl headerid\n");
+ return 0;
+ }
+ err = process_audio_header_elements(s);
+ break;
+
+ case MVhd_TAG :
+ err = process_video_header_vp6(s);
+ break;
+ }
+
+ if (err < 0) {
+ av_log(s, AV_LOG_ERROR, "error parsing header: %i\n", err);
+ return err;
+ }
+
+ url_fseek(pb, startpos + size, SEEK_SET);
+ }
+
+ url_fseek(pb, 0, SEEK_SET);