[SCM] libav/experimental: next try at fixing rv20 decoding

[siretart at users.alioth.debian.org]

The following commit has been merged in the experimental branch:
commit 423962dc0105530852c9a25c478efbb8de9bcdf4
Author: Michael Niedermayer <michaelni at gmx.at>
Date:   Sun Dec 5 23:21:39 2004 +0000

    next try at fixing rv20 decoding
    
    Originally committed as revision 3728 to svn://svn.ffmpeg.org/ffmpeg/trunk

diff --git a/libavcodec/rv10.c b/libavcodec/rv10.c
index efba219..663d8ad 100644
--- a/libavcodec/rv10.c
+++ b/libavcodec/rv10.c
@@ -350,6 +350,13 @@ static int rv20_decode_picture_header(MpegEncContext *s)
     }
     av_log(s->avctx, AV_LOG_DEBUG, "\n");
 #endif
+#if 0
+    for(i=0; i<s->avctx->extradata_size; i++){
+        av_log(s->avctx, AV_LOG_DEBUG, "%2X ", ((uint8_t*)s->avctx->extradata)[i]);
+        if(i%4==3) av_log(s->avctx, AV_LOG_DEBUG, " ");
+    }
+    av_log(s->avctx, AV_LOG_DEBUG, "\n");
+#endif
     
     if(s->avctx->sub_id == 0x30202002 || s->avctx->sub_id == 0x30203002){
         if (get_bits(&s->gb, 3)){
@@ -396,18 +403,21 @@ static int rv20_decode_picture_header(MpegEncContext *s)
 //            av_log(s->avctx, AV_LOG_ERROR, "unknown bit3 set\n");
 //            return -1;
         }
-        seq= get_bits(&s->gb, 15);
-        if (s->avctx->sub_id == 0x20201002 && 0 && get_bits(&s->gb, 1)){
-            av_log(s->avctx, AV_LOG_ERROR, "unknown bit4 set\n");
-//            return -1;
+        seq= get_bits(&s->gb, 14)<<1;
+        
+        if(s->avctx->extradata_size >= 4 && ((uint8_t*)s->avctx->extradata)[1]&1){
+            get_bits(&s->gb, 1);
         }
-        if(s->avctx->sub_id == 0x20201002){
-            mb_pos= ff_h263_decode_mba(s);
-        }else{
-            mb_pos= get_bits(&s->gb, av_log2(s->mb_num-1)+1);
-            s->mb_x= mb_pos % s->mb_width;
-            s->mb_y= mb_pos / s->mb_width;
+        if(s->avctx->extradata_size >= 4 && ((uint8_t*)s->avctx->extradata)[1]&2){
+            get_bits(&s->gb, 1);
+        }
+        if(s->avctx->extradata_size >= 4 && ((uint8_t*)s->avctx->extradata)[1]&4){
+            get_bits(&s->gb, 2);
         }
+
+        mb_pos= get_bits(&s->gb, av_log2(s->mb_num-1)+1);
+        s->mb_x= mb_pos % s->mb_width;
+        s->mb_y= mb_pos / s->mb_width;
     }else{
         seq= get_bits(&s->gb, 8)*128;
         mb_pos= ff_h263_decode_mba(s);
@@ -508,7 +518,11 @@ static int rv10_decode_init(AVCodecContext *avctx)
     default:
         av_log(s->avctx, AV_LOG_ERROR, "unknown header %X\n", avctx->sub_id);
     }
-//av_log(avctx, AV_LOG_DEBUG, "ver:%X\n", avctx->sub_id);
+    
+    if(avctx->debug & FF_DEBUG_PICT_INFO){
+        av_log(avctx, AV_LOG_DEBUG, "ver:%X ver0:%X\n", avctx->sub_id, avctx->extradata_size >= 4 ? ((uint32_t*)avctx->extradata)[0] : -1);
+    }
+    
     if (MPV_common_init(s) < 0)
         return -1;
 
diff --git a/libavformat/rm.c b/libavformat/rm.c
index 0b280e9..ec8845f 100644
--- a/libavformat/rm.c
+++ b/libavformat/rm.c
@@ -634,6 +634,7 @@ static int rm_read_header(AVFormatContext *s, AVFormatParameters *ap)
                 /* ra type header */
                 rm_read_audio_stream_info(s, st, 0);
             } else {
+                int fps, fps2;
                 if (get_le32(pb) != MKTAG('V', 'I', 'D', 'O')) {
                 fail1:
                     av_log(&st->codec, AV_LOG_ERROR, "Unsupported video codec\n");
@@ -647,14 +648,24 @@ static int rm_read_header(AVFormatContext *s, AVFormatParameters *ap)
                 st->codec.width = get_be16(pb);
                 st->codec.height = get_be16(pb);
                 st->codec.frame_rate_base= 1;
-                st->codec.frame_rate = get_be16(pb) * st->codec.frame_rate_base;
+                fps= get_be16(pb);
                 st->codec.codec_type = CODEC_TYPE_VIDEO;
                 get_be32(pb);
+                fps2= get_be16(pb);
                 get_be16(pb);
-                get_be32(pb);
-                get_be16(pb);
+                
+                st->codec.extradata_size= codec_data_size - (url_ftell(pb) - codec_pos);
+                st->codec.extradata= av_malloc(st->codec.extradata_size);
+                get_buffer(pb, st->codec.extradata, st->codec.extradata_size);
+                
+//                av_log(NULL, AV_LOG_DEBUG, "fps= %d fps2= %d\n", fps, fps2);
+                st->codec.frame_rate = fps * st->codec.frame_rate_base;
                 /* modification of h263 codec version (!) */
-                h263_hack_version = get_be32(pb);
+#ifdef WORDS_BIGENDIAN
+                h263_hack_version = ((uint32_t*)st->codec.extradata)[1];
+#else
+                h263_hack_version = bswap_32(((uint32_t*)st->codec.extradata)[1]);
+#endif
                 st->codec.sub_id = h263_hack_version;
                 if((h263_hack_version>>28)==1)
                     st->codec.codec_id = CODEC_ID_RV10;

-- 
Libav/FFmpeg packaging