add codec_tag and codec_stream_tag to MpegEncContext to not alter avctx values

Originally committed as revision 6930 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/h263.c

@@ -113,7 +113,7 @@ max run: 29/41
 #endif
 
 #if 0 //3IV1 is quite rare and it slows things down a tiny bit
-#define IS_3IV1 s->avctx->codec_tag == ff_get_fourcc("3IV1")
+#define IS_3IV1 s->codec_tag == ff_get_fourcc("3IV1")
 #else
 #define IS_3IV1 0
 #endif
@@ -5294,7 +5294,7 @@ int h263_decode_picture_header(MpegEncContext *s)
          );
      }
 #if 1
-    if (s->pict_type == I_TYPE && s->avctx->codec_tag == ff_get_fourcc("ZYGO")){
+    if (s->pict_type == I_TYPE && s->codec_tag == ff_get_fourcc("ZYGO")){
         int i,j;
         for(i=0; i<85; i++) av_log(s->avctx, AV_LOG_DEBUG, "%d", get_bits1(&s->gb));
         av_log(s->avctx, AV_LOG_DEBUG, "\n");
@@ -5619,7 +5619,7 @@ static int decode_vol_header(MpegEncContext *s, GetBitContext *gb){
             skip_bits1(gb);   /* marker */
             height = get_bits(gb, 13);
             skip_bits1(gb);   /* marker */
-            if(width && height && !(s->width && s->avctx->codec_tag == ff_get_fourcc("MP4S"))){ /* they should be non zero but who knows ... */
+            if(width && height && !(s->width && s->codec_tag == ff_get_fourcc("MP4S"))){ /* they should be non zero but who knows ... */
                 s->width = width;
                 s->height = height;
 //                printf("width/height: %d %d\n", width, height);
@@ -6063,7 +6063,7 @@ int ff_mpeg4_decode_picture_header(MpegEncContext * s, GetBitContext *gb)
     /* search next start code */
     align_get_bits(gb);
 
-    if(s->avctx->codec_tag == ff_get_fourcc("WV1F") && show_bits(gb, 24) == 0x575630){
+    if(s->codec_tag == ff_get_fourcc("WV1F") && show_bits(gb, 24) == 0x575630){
         skip_bits(gb, 24);
         if(get_bits(gb, 8) == 0xF0)
             return decode_vop_header(s, gb);

libavcodec/h263dec.c

@@ -518,19 +518,19 @@ retry:
     avctx->has_b_frames= !s->low_delay;
 
     if(s->xvid_build==0 && s->divx_version==0 && s->lavc_build==0){
-        if(s->avctx->stream_codec_tag == ff_get_fourcc("XVID") ||
-           s->avctx->codec_tag == ff_get_fourcc("XVID") || s->avctx->codec_tag == ff_get_fourcc("XVIX") ||
-           s->avctx->codec_tag == ff_get_fourcc("RMP4"))
+        if(s->stream_codec_tag == ff_get_fourcc("XVID") ||
+           s->codec_tag == ff_get_fourcc("XVID") || s->codec_tag == ff_get_fourcc("XVIX") ||
+           s->codec_tag == ff_get_fourcc("RMP4"))
             s->xvid_build= -1;
 #if 0
-        if(s->avctx->codec_tag == ff_get_fourcc("DIVX") && s->vo_type==0 && s->vol_control_parameters==1
+        if(s->codec_tag == ff_get_fourcc("DIVX") && s->vo_type==0 && s->vol_control_parameters==1
            && s->padding_bug_score > 0 && s->low_delay) // XVID with modified fourcc
             s->xvid_build= -1;
 #endif
     }
 
     if(s->xvid_build==0 && s->divx_version==0 && s->lavc_build==0){
-        if(s->avctx->codec_tag == ff_get_fourcc("DIVX") && s->vo_type==0 && s->vol_control_parameters==0)
+        if(s->codec_tag == ff_get_fourcc("DIVX") && s->vo_type==0 && s->vol_control_parameters==0)
             s->divx_version= 400; //divx 4
     }
 
@@ -540,10 +540,10 @@ retry:
     }
 
     if(s->workaround_bugs&FF_BUG_AUTODETECT){
-        if(s->avctx->codec_tag == ff_get_fourcc("XVIX"))
+        if(s->codec_tag == ff_get_fourcc("XVIX"))
             s->workaround_bugs|= FF_BUG_XVID_ILACE;
 
-        if(s->avctx->codec_tag == ff_get_fourcc("UMP4")){
+        if(s->codec_tag == ff_get_fourcc("UMP4")){
             s->workaround_bugs|= FF_BUG_UMP4;
         }
 

libavcodec/mpegvideo.c

@@ -698,12 +698,12 @@ int MPV_common_init(MpegEncContext *s)
     yc_size = y_size + 2 * c_size;
 
     /* convert fourcc to upper case */
-    s->avctx->codec_tag=   toupper( s->avctx->codec_tag     &0xFF)
+    s->codec_tag=          toupper( s->avctx->codec_tag     &0xFF)
                         + (toupper((s->avctx->codec_tag>>8 )&0xFF)<<8 )
                         + (toupper((s->avctx->codec_tag>>16)&0xFF)<<16)
                         + (toupper((s->avctx->codec_tag>>24)&0xFF)<<24);
 
-    s->avctx->stream_codec_tag=   toupper( s->avctx->stream_codec_tag     &0xFF)
+    s->stream_codec_tag=          toupper( s->avctx->stream_codec_tag     &0xFF)
                                + (toupper((s->avctx->stream_codec_tag>>8 )&0xFF)<<8 )
                                + (toupper((s->avctx->stream_codec_tag>>16)&0xFF)<<16)
                                + (toupper((s->avctx->stream_codec_tag>>24)&0xFF)<<24);

libavcodec/mpegvideo.h

@@ -225,6 +225,8 @@ typedef struct MpegEncContext {
     int chroma_elim_threshold;
     int strict_std_compliance; ///< strictly follow the std (MPEG4, ...)
     int workaround_bugs;       ///< workaround bugs in encoders which cannot be detected automatically
+    int codec_tag;             ///< internal codec_tag upper case converted from avctx codec_tag
+    int stream_codec_tag;      ///< internal stream_codec_tag upper case converted from avctx stream_codec_tag
     /* the following fields are managed internally by the encoder */
 
     /** bit output */