[SCM] libav/experimental: mpeg4 mpeg quantizer encoding

[siretart at users.alioth.debian.org]

The following commit has been merged in the experimental branch:
commit 87f8cab45b66712c23f861661afb97739f1fd8f5
Author: Michael Niedermayer <michaelni at gmx.at>
Date:   Tue Aug 6 23:51:15 2002 +0000

    mpeg4 mpeg quantizer encoding
    
    Originally committed as revision 844 to svn://svn.ffmpeg.org/ffmpeg/trunk

diff --git a/libavcodec/avcodec.h b/libavcodec/avcodec.h
index 641cf15..7dbcc46 100644
--- a/libavcodec/avcodec.h
+++ b/libavcodec/avcodec.h
@@ -5,8 +5,8 @@
 
 #define LIBAVCODEC_VERSION_INT 0x000406
 #define LIBAVCODEC_VERSION     "0.4.6"
-#define LIBAVCODEC_BUILD       4618
-#define LIBAVCODEC_BUILD_STR   "4618"
+#define LIBAVCODEC_BUILD       4619
+#define LIBAVCODEC_BUILD_STR   "4619"
 
 enum CodecID {
     CODEC_ID_NONE, 
@@ -278,6 +278,7 @@ typedef struct AVCodecContext {
     int parse_only; /* decoding only: if true, only parsing is done
                        (function avcodec_parse_frame()). The frame
                        data is returned. Only MPEG codecs support this now. */
+    int mpeg_quant; /* 0-> h263 quant 1-> mpeg quant */
 
     //FIXME this should be reordered after kabis API is finished ...
     /*
@@ -300,8 +301,6 @@ typedef struct AVCodecContext {
     unsigned long int
 	    ul_res0,ul_res1,ul_res2,ul_res3,ul_res4,ul_res5,
 	    ul_res6,ul_res7,ul_res8,ul_res9,ul_res10,ul_res11,ul_res12;
-    unsigned int
-	    ui_res0;
     unsigned short int
 	    us_res0,us_res1,us_res2,us_res3,us_res4,us_res5,
 	    us_res6,us_res7,us_res8,us_res9,us_res10,us_res11,us_res12;
diff --git a/libavcodec/h263.c b/libavcodec/h263.c
index 5587f74..2fd90e9 100644
--- a/libavcodec/h263.c
+++ b/libavcodec/h263.c
@@ -1122,10 +1122,13 @@ void h263_encode_init(MpegEncContext *s)
         s->c_dc_scale_table= ff_mpeg1_dc_scale_table;
     }
 
-    /* h263 type bias */
-    //FIXME mpeg4 mpeg quantizer    
-    s->intra_quant_bias=0;
-    s->inter_quant_bias=-(1<<(QUANT_BIAS_SHIFT-2)); //(a - x/4)/x
+    if(s->mpeg_quant){
+        s->intra_quant_bias= 3<<(QUANT_BIAS_SHIFT-3); //(a + x*3/8)/x
+        s->inter_quant_bias= 0;
+    }else{
+        s->intra_quant_bias=0;
+        s->inter_quant_bias=-(1<<(QUANT_BIAS_SHIFT-2)); //(a - x/4)/x
+    }
 }
 
 static void h263_encode_block(MpegEncContext * s, DCTELEM * block, int n)
@@ -1274,7 +1277,9 @@ static void mpeg4_encode_vol_header(MpegEncContext * s)
         put_bits(&s->pb, 2, s->vol_sprite_usage=0);		/* sprite enable */
     }
     put_bits(&s->pb, 1, 0);		/* not 8 bit */
-    put_bits(&s->pb, 1, 0);		/* quant type= h263 style*/
+    put_bits(&s->pb, 1, s->mpeg_quant);	/* quant type= (0=h263 style)*/
+    if(s->mpeg_quant) put_bits(&s->pb, 2, 0); /* no custom matrixes */
+
     if (vo_ver_id != 1)
         put_bits(&s->pb, 1, s->quarter_sample=0);
     put_bits(&s->pb, 1, 1);		/* complexity estimation disable */
diff --git a/libavcodec/i386/mpegvideo_mmx_template.c b/libavcodec/i386/mpegvideo_mmx_template.c
index aed537a..d84f253 100644
--- a/libavcodec/i386/mpegvideo_mmx_template.c
+++ b/libavcodec/i386/mpegvideo_mmx_template.c
@@ -82,7 +82,7 @@ static int RENAME(dct_quantize)(MpegEncContext *s,
         qmat = s->q_inter_matrix16[qscale];
     }
 
-    if(s->out_format == FMT_H263){
+    if(s->out_format == FMT_H263 && s->mpeg_quant==0){
     
         asm volatile(
             "movd %%eax, %%mm3			\n\t" // last_non_zero_p1
@@ -189,6 +189,7 @@ static int RENAME(dct_quantize)(MpegEncContext *s,
     }
 
     if(s->mb_intra) temp_block[0]= level; //FIXME move afer permute
+        
 // last_non_zero_p1=64;       
     /* permute for IDCT */
     asm volatile(
diff --git a/libavcodec/mpegvideo.c b/libavcodec/mpegvideo.c
index f08ff6f..320e2e4 100644
--- a/libavcodec/mpegvideo.c
+++ b/libavcodec/mpegvideo.c
@@ -390,6 +390,7 @@ int MPV_encode_init(AVCodecContext *avctx)
     s->chroma_elim_threshold= avctx->chroma_elim_threshold;
     s->strict_std_compliance= avctx->strict_std_compliance;
     s->data_partitioning= avctx->flags & CODEC_FLAG_PART;
+    s->mpeg_quant= avctx->mpeg_quant;
 
     if (s->gop_size <= 1) {
         s->intra_only = 1;
@@ -542,12 +543,16 @@ int MPV_encode_init(AVCodecContext *avctx)
     
     /* init default q matrix */
     for(i=0;i<64;i++) {
-        if(s->out_format == FMT_H263)
-            s->intra_matrix[i] = ff_mpeg1_default_non_intra_matrix[i];
-        else
+        if(s->codec_id==CODEC_ID_MPEG4 && s->mpeg_quant){
+            s->intra_matrix[i] = ff_mpeg4_default_intra_matrix[i];
+            s->inter_matrix[i] = ff_mpeg4_default_non_intra_matrix[i];
+        }else if(s->out_format == FMT_H263){
+            s->intra_matrix[i] =
+            s->inter_matrix[i] = ff_mpeg1_default_non_intra_matrix[i];
+        }else{ /* mpeg1 */
             s->intra_matrix[i] = ff_mpeg1_default_intra_matrix[i];
-
-        s->inter_matrix[i] = ff_mpeg1_default_non_intra_matrix[i];
+            s->inter_matrix[i] = ff_mpeg1_default_non_intra_matrix[i];
+        }
     }
 
     /* precompute matrix */
diff --git a/libavcodec/mpegvideo.h b/libavcodec/mpegvideo.h
index b88ffcd..0f4983f 100644
--- a/libavcodec/mpegvideo.h
+++ b/libavcodec/mpegvideo.h
@@ -521,6 +521,9 @@ static inline int get_rl_index(const RLTable *rl, int last, int run, int level)
 
 extern UINT8 ff_mpeg4_y_dc_scale_table[32];
 extern UINT8 ff_mpeg4_c_dc_scale_table[32];
+extern INT16 ff_mpeg4_default_intra_matrix[64];
+extern INT16 ff_mpeg4_default_non_intra_matrix[64];
+
 void h263_encode_mb(MpegEncContext *s, 
                     DCTELEM block[6][64],
                     int motion_x, int motion_y);

-- 
Libav/FFmpeg packaging