libavformat/segment: add an option to write the header to a separate file
[ffmpeg.git] / libavcodec / ituh263dec.c
index ad5a3cb..bf9bd34 100644 (file)
@@ -82,7 +82,7 @@ void ff_h263_show_pict_info(MpegEncContext *s){
          s->modified_quant ? " MQ" : "",
          s->loop_filter ? " LOOP" : "",
          s->h263_slice_structured ? " SS" : "",
-         s->avctx->time_base.den, s->avctx->time_base.num
+         s->avctx->framerate.num, s->avctx->framerate.den
     );
     }
 }
@@ -435,8 +435,7 @@ static int h263_decode_block(MpegEncContext * s, int16_t * block,
         }
     } else if (s->mb_intra) {
         /* DC coef */
-        if(s->codec_id == AV_CODEC_ID_RV10){
-#if CONFIG_RV10_DECODER
+        if (CONFIG_RV10_DECODER && s->codec_id == AV_CODEC_ID_RV10) {
           if (s->rv10_version == 3 && s->pict_type == AV_PICTURE_TYPE_I) {
             int component, diff;
             component = (n <= 3 ? 0 : n - 4 + 1);
@@ -456,7 +455,6 @@ static int h263_decode_block(MpegEncContext * s, int16_t * block,
                 if (level == 255)
                     level = 128;
           }
-#endif
         }else{
             level = get_bits(&s->gb, 8);
             if((level&0x7F) == 0){
@@ -481,14 +479,16 @@ static int h263_decode_block(MpegEncContext * s, int16_t * block,
 retry:
     {
     OPEN_READER(re, &s->gb);
+    i--; // offset by -1 to allow direct indexing of scan_table
     for(;;) {
         UPDATE_CACHE(re, &s->gb);
         GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
-        if (run == 66 && level){
-            av_log(s->avctx, AV_LOG_ERROR, "illegal ac vlc code at %dx%d\n", s->mb_x, s->mb_y);
-            return -1;
-        }
         if (run == 66) {
+            if (level){
+                CLOSE_READER(re, &s->gb);
+                av_log(s->avctx, AV_LOG_ERROR, "illegal ac vlc code at %dx%d\n", s->mb_x, s->mb_y);
+                return -1;
+            }
             /* escape */
             if (CONFIG_FLV_DECODER && s->h263_flv > 1) {
                 int is11 = SHOW_UBITS(re, &s->gb, 1);
@@ -529,16 +529,16 @@ retry:
             SKIP_COUNTER(re, &s->gb, 1);
         }
         i += run;
-        if (i > 64){
-            // redo update without last flag
-            i = i - run + ((run-1)&63);
+        if (i >= 64){
+            CLOSE_READER(re, &s->gb);
+            // redo update without last flag, revert -1 offset
+            i = i - run + ((run-1)&63) + 1;
             if (i < 64) {
                 // only last marker, no overrun
                 block[scan_table[i]] = level;
                 break;
             }
             if(s->alt_inter_vlc && rl == &ff_h263_rl_inter && !s->mb_intra){
-                CLOSE_READER(re, &s->gb);
                 //Looks like a hack but no, it's the way it is supposed to work ...
                 rl = &ff_rl_intra_aic;
                 i = 0;
@@ -549,10 +549,9 @@ retry:
             av_log(s->avctx, AV_LOG_ERROR, "run overflow at %dx%d i:%d\n", s->mb_x, s->mb_y, s->mb_intra);
             return -1;
         }
-        j = scan_table[i-1];
+        j = scan_table[i];
         block[j] = level;
     }
-    CLOSE_READER(re, &s->gb);
     }
 not_coded:
     if (s->mb_intra && s->h263_aic) {
@@ -947,7 +946,7 @@ int ff_h263_decode_picture_header(MpegEncContext *s)
         s->width = width;
         s->height = height;
         s->avctx->sample_aspect_ratio= (AVRational){12,11};
-        s->avctx->time_base= (AVRational){1001, 30000};
+        s->avctx->framerate = (AVRational){ 30000, 1001 };
     } else {
         int ufep;
 
@@ -1046,18 +1045,18 @@ int ff_h263_decode_picture_header(MpegEncContext *s)
 
             if(s->custom_pcf){
                 int gcd;
-                s->avctx->time_base.den= 1800000;
-                s->avctx->time_base.num= 1000 + get_bits1(&s->gb);
-                s->avctx->time_base.num*= get_bits(&s->gb, 7);
-                if(s->avctx->time_base.num == 0){
+                s->avctx->framerate.num  = 1800000;
+                s->avctx->framerate.den  = 1000 + get_bits1(&s->gb);
+                s->avctx->framerate.den *= get_bits(&s->gb, 7);
+                if(s->avctx->framerate.den == 0){
                     av_log(s, AV_LOG_ERROR, "zero framerate\n");
                     return -1;
                 }
-                gcd= av_gcd(s->avctx->time_base.den, s->avctx->time_base.num);
-                s->avctx->time_base.den /= gcd;
-                s->avctx->time_base.num /= gcd;
+                gcd= av_gcd(s->avctx->framerate.den, s->avctx->framerate.num);
+                s->avctx->framerate.den /= gcd;
+                s->avctx->framerate.num /= gcd;
             }else{
-                s->avctx->time_base= (AVRational){1001, 30000};
+                s->avctx->framerate = (AVRational){ 30000, 1001 };
             }
         }