export DCT coefficients patch by (Wolfgang Hesseler <wolfgang.hesseler at imk dot fraunhofer dot de>)

Originally committed as revision 2816 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/avcodec.h

@@ -17,7 +17,7 @@ extern "C" {
 
 #define FFMPEG_VERSION_INT     0x000408
 #define FFMPEG_VERSION         "0.4.8"
-#define LIBAVCODEC_BUILD       4704
+#define LIBAVCODEC_BUILD       4705
 
 #define LIBAVCODEC_VERSION_INT FFMPEG_VERSION_INT
 #define LIBAVCODEC_VERSION     FFMPEG_VERSION
@@ -529,6 +529,13 @@ typedef struct AVPanScan{
      * - decoding: set by lavc (before get_buffer() call))\
      */\
     int buffer_hints;\
+\
+    /**\
+     * DCT coeffitients\
+     * - encoding: unused\
+     * - decoding: set by lavc\
+     */\
+    short *dct_coeff;\
 
 #define FF_QSCALE_TYPE_MPEG1	0
 #define FF_QSCALE_TYPE_MPEG2	1
@@ -1138,7 +1145,7 @@ typedef struct AVCodecContext {
 #define FF_DEBUG_MB_TYPE   8
 #define FF_DEBUG_QP        16
 #define FF_DEBUG_MV        32
-//#define FF_DEBUG_VIS_MV    0x00000040
+#define FF_DEBUG_DCT_COEFF 0x00000040
 #define FF_DEBUG_SKIP      0x00000080
 #define FF_DEBUG_STARTCODE 0x00000100
 #define FF_DEBUG_PTS       0x00000200

libavcodec/mpegvideo.c

@@ -354,6 +354,9 @@ static int alloc_picture(MpegEncContext *s, Picture *pic, int shared){
             }
             pic->motion_subsample_log2= 3;
         }
+        if(s->avctx->debug&FF_DEBUG_DCT_COEFF) {
+            CHECKED_ALLOCZ(pic->dct_coeff, 64 * mb_array_size * sizeof(DCTELEM)*6)
+        }
         pic->qstride= s->mb_stride;
         CHECKED_ALLOCZ(pic->pan_scan , 1 * sizeof(AVPanScan))
     }
@@ -385,6 +388,7 @@ static void free_picture(MpegEncContext *s, Picture *pic){
     av_freep(&pic->mbskip_table);
     av_freep(&pic->qscale_table);
     av_freep(&pic->mb_type_base);
+    av_freep(&pic->dct_coeff);
     av_freep(&pic->pan_scan);
     pic->mb_type= NULL;
     for(i=0; i<2; i++){
@@ -3080,6 +3084,15 @@ void MPV_decode_mb(MpegEncContext *s, DCTELEM block[6][64])
     mb_x = s->mb_x;
     mb_y = s->mb_y;
 
+    if(s->avctx->debug&FF_DEBUG_DCT_COEFF) {
+       /* save DCT coefficients */
+       int i,j;
+       DCTELEM *dct = &s->current_picture.dct_coeff[mb_xy*64*6];
+       for(i=0; i<6; i++)
+           for(j=0; j<64; j++)
+               *dct++ = block[i][s->dsp.idct_permutation[j]];
+    }
+
     s->current_picture.qscale_table[mb_xy]= s->qscale;
 
     /* update DC predictors for P macroblocks */