Do not declare a counter as unsigned when it is not needed

[ffmpeg] / libavformat / 4xm.c

diff --git a/libavformat/4xm.c b/libavformat/4xm.c
index 4c52f8a0e64462c956e5e2d1d283ed044c4db34d..25c2080d7f0b99acf88b37e46f2e265c32578d70 100644 (file)
--- a/libavformat/4xm.c
+++ b/libavformat/4xm.c
@@ -92,7 +92,7 @@ static int fourxm_probe(AVProbeData *p)
 static int fourxm_read_header(AVFormatContext *s,
                               AVFormatParameters *ap)
 {
-    ByteIOContext *pb = &s->pb;
+    ByteIOContext *pb = s->pb;
     unsigned int fourcc_tag;
     unsigned int size;
     int header_size;
@@ -138,7 +138,6 @@ static int fourxm_read_header(AVFormatContext *s,
             }
             fourxm->width = AV_RL32(&header[i + 36]);
             fourxm->height = AV_RL32(&header[i + 40]);
-            i += 8 + size;
 
             /* allocate a new AVStream */
             st = av_new_stream(s, 0);
@@ -150,10 +149,13 @@ static int fourxm_read_header(AVFormatContext *s,
 
             st->codec->codec_type = CODEC_TYPE_VIDEO;
             st->codec->codec_id = CODEC_ID_4XM;
-            st->codec->codec_tag = 0;  /* no fourcc */
+            st->codec->extradata_size = 4;
+            st->codec->extradata = av_malloc(4);
+            AV_WL32(st->codec->extradata, AV_RL32(&header[i + 16]));
             st->codec->width = fourxm->width;
             st->codec->height = fourxm->height;
 
+            i += 8 + size;
         } else if (fourcc_tag == strk_TAG) {
             /* check that there is enough data */
             if (size != strk_SIZE) {
@@ -222,7 +224,7 @@ static int fourxm_read_packet(AVFormatContext *s,
                               AVPacket *pkt)
 {
     FourxmDemuxContext *fourxm = s->priv_data;
-    ByteIOContext *pb = &s->pb;
+    ByteIOContext *pb = s->pb;
     unsigned int fourcc_tag;
     unsigned int size, out_size;
     int ret = 0;
@@ -233,7 +235,7 @@ static int fourxm_read_packet(AVFormatContext *s,
 
     while (!packet_read) {
 
-        if ((ret = get_buffer(&s->pb, header, 8)) < 0)
+        if ((ret = get_buffer(s->pb, header, 8)) < 0)
             return ret;
         fourcc_tag = AV_RL32(&header[0]);
         size = AV_RL32(&header[4]);
@@ -263,9 +265,9 @@ static int fourxm_read_packet(AVFormatContext *s,
                 return AVERROR(EIO);
             pkt->stream_index = fourxm->video_stream_index;
             pkt->pts = fourxm->video_pts;
-            pkt->pos = url_ftell(&s->pb);
+            pkt->pos = url_ftell(s->pb);
             memcpy(pkt->data, header, 8);
-            ret = get_buffer(&s->pb, &pkt->data[8], size);
+            ret = get_buffer(s->pb, &pkt->data[8], size);
 
             if (ret < 0)
                 av_free_packet(pkt);
@@ -280,7 +282,7 @@ static int fourxm_read_packet(AVFormatContext *s,
             size-=8;
 
             if (track_number == fourxm->selected_track) {
-                ret= av_get_packet(&s->pb, pkt, size);
+                ret= av_get_packet(s->pb, pkt, size);
                 if(ret<0)
                     return AVERROR(EIO);
                 pkt->stream_index =
@@ -326,7 +328,7 @@ static int fourxm_read_close(AVFormatContext *s)
 
 AVInputFormat fourxm_demuxer = {
     "4xm",
-    "4X Technologies format",
+    NULL_IF_CONFIG_SMALL("4X Technologies format"),
     sizeof(FourxmDemuxContext),
     fourxm_probe,
     fourxm_read_header,