RV40: reuse some H.264 motion compensation functions in RV40.

Since RV40 is based on H.264, it uses the same interpolation filters and
functions for halfpel interpolation in one direction can be reused.
Unfortunately other cases are implemented differently and produce slightly
different output because of rounding.
Signed-off-by: Mans Rullgard <mans@mansr.com>

libavcodec/rv40dsp.c

@@ -106,10 +106,6 @@ static void OPNAME ## rv40_qpel ## SIZE ## _mc10_c(uint8_t *dst, uint8_t *src, i
     OPNAME ## rv40_qpel ## SIZE ## _h_lowpass(dst, src, stride, stride, SIZE, 52, 20, 6);\
 }\
 \
-static void OPNAME ## rv40_qpel ## SIZE ## _mc20_c(uint8_t *dst, uint8_t *src, int stride){\
-    OPNAME ## rv40_qpel ## SIZE ## _h_lowpass(dst, src, stride, stride, SIZE, 20, 20, 5);\
-}\
-\
 static void OPNAME ## rv40_qpel ## SIZE ## _mc30_c(uint8_t *dst, uint8_t *src, int stride){\
     OPNAME ## rv40_qpel ## SIZE ## _h_lowpass(dst, src, stride, stride, SIZE, 20, 52, 6);\
 }\
@@ -139,10 +135,6 @@ static void OPNAME ## rv40_qpel ## SIZE ## _mc31_c(uint8_t *dst, uint8_t *src, i
     OPNAME ## rv40_qpel ## SIZE ## _v_lowpass(dst, full_mid, stride, SIZE, SIZE, 52, 20, 6);\
 }\
 \
-static void OPNAME ## rv40_qpel ## SIZE ## _mc02_c(uint8_t *dst, uint8_t *src, int stride){\
-    OPNAME ## rv40_qpel ## SIZE ## _v_lowpass(dst, src, stride, stride, SIZE, 20, 20, 5);\
-}\
-\
 static void OPNAME ## rv40_qpel ## SIZE ## _mc12_c(uint8_t *dst, uint8_t *src, int stride){\
     uint8_t full[SIZE*(SIZE+5)];\
     uint8_t * const full_mid = full + SIZE*2;\
@@ -305,13 +297,13 @@ RV40_WEIGHT_FUNC(8)
 av_cold void ff_rv40dsp_init(RV34DSPContext *c, DSPContext* dsp) {
     c->put_pixels_tab[0][ 0] = dsp->put_h264_qpel_pixels_tab[0][0];
     c->put_pixels_tab[0][ 1] = put_rv40_qpel16_mc10_c;
-    c->put_pixels_tab[0][ 2] = put_rv40_qpel16_mc20_c;
+    c->put_pixels_tab[0][ 2] = dsp->put_h264_qpel_pixels_tab[0][2];
     c->put_pixels_tab[0][ 3] = put_rv40_qpel16_mc30_c;
     c->put_pixels_tab[0][ 4] = put_rv40_qpel16_mc01_c;
     c->put_pixels_tab[0][ 5] = put_rv40_qpel16_mc11_c;
     c->put_pixels_tab[0][ 6] = put_rv40_qpel16_mc21_c;
     c->put_pixels_tab[0][ 7] = put_rv40_qpel16_mc31_c;
-    c->put_pixels_tab[0][ 8] = put_rv40_qpel16_mc02_c;
+    c->put_pixels_tab[0][ 8] = dsp->put_h264_qpel_pixels_tab[0][8];
     c->put_pixels_tab[0][ 9] = put_rv40_qpel16_mc12_c;
     c->put_pixels_tab[0][10] = put_rv40_qpel16_mc22_c;
     c->put_pixels_tab[0][11] = put_rv40_qpel16_mc32_c;
@@ -321,13 +313,13 @@ av_cold void ff_rv40dsp_init(RV34DSPContext *c, DSPContext* dsp) {
     c->put_pixels_tab[0][15] = ff_put_rv40_qpel16_mc33_c;
     c->avg_pixels_tab[0][ 0] = dsp->avg_h264_qpel_pixels_tab[0][0];
     c->avg_pixels_tab[0][ 1] = avg_rv40_qpel16_mc10_c;
-    c->avg_pixels_tab[0][ 2] = avg_rv40_qpel16_mc20_c;
+    c->avg_pixels_tab[0][ 2] = dsp->avg_h264_qpel_pixels_tab[0][2];
     c->avg_pixels_tab[0][ 3] = avg_rv40_qpel16_mc30_c;
     c->avg_pixels_tab[0][ 4] = avg_rv40_qpel16_mc01_c;
     c->avg_pixels_tab[0][ 5] = avg_rv40_qpel16_mc11_c;
     c->avg_pixels_tab[0][ 6] = avg_rv40_qpel16_mc21_c;
     c->avg_pixels_tab[0][ 7] = avg_rv40_qpel16_mc31_c;
-    c->avg_pixels_tab[0][ 8] = avg_rv40_qpel16_mc02_c;
+    c->avg_pixels_tab[0][ 8] = dsp->avg_h264_qpel_pixels_tab[0][8];
     c->avg_pixels_tab[0][ 9] = avg_rv40_qpel16_mc12_c;
     c->avg_pixels_tab[0][10] = avg_rv40_qpel16_mc22_c;
     c->avg_pixels_tab[0][11] = avg_rv40_qpel16_mc32_c;
@@ -337,13 +329,13 @@ av_cold void ff_rv40dsp_init(RV34DSPContext *c, DSPContext* dsp) {
     c->avg_pixels_tab[0][15] = ff_avg_rv40_qpel16_mc33_c;
     c->put_pixels_tab[1][ 0] = dsp->put_h264_qpel_pixels_tab[1][0];
     c->put_pixels_tab[1][ 1] = put_rv40_qpel8_mc10_c;
-    c->put_pixels_tab[1][ 2] = put_rv40_qpel8_mc20_c;
+    c->put_pixels_tab[1][ 2] = dsp->put_h264_qpel_pixels_tab[1][2];
     c->put_pixels_tab[1][ 3] = put_rv40_qpel8_mc30_c;
     c->put_pixels_tab[1][ 4] = put_rv40_qpel8_mc01_c;
     c->put_pixels_tab[1][ 5] = put_rv40_qpel8_mc11_c;
     c->put_pixels_tab[1][ 6] = put_rv40_qpel8_mc21_c;
     c->put_pixels_tab[1][ 7] = put_rv40_qpel8_mc31_c;
-    c->put_pixels_tab[1][ 8] = put_rv40_qpel8_mc02_c;
+    c->put_pixels_tab[1][ 8] = dsp->put_h264_qpel_pixels_tab[1][8];
     c->put_pixels_tab[1][ 9] = put_rv40_qpel8_mc12_c;
     c->put_pixels_tab[1][10] = put_rv40_qpel8_mc22_c;
     c->put_pixels_tab[1][11] = put_rv40_qpel8_mc32_c;
@@ -353,13 +345,13 @@ av_cold void ff_rv40dsp_init(RV34DSPContext *c, DSPContext* dsp) {
     c->put_pixels_tab[1][15] = ff_put_rv40_qpel8_mc33_c;
     c->avg_pixels_tab[1][ 0] = dsp->avg_h264_qpel_pixels_tab[1][0];
     c->avg_pixels_tab[1][ 1] = avg_rv40_qpel8_mc10_c;
-    c->avg_pixels_tab[1][ 2] = avg_rv40_qpel8_mc20_c;
+    c->avg_pixels_tab[1][ 2] = dsp->avg_h264_qpel_pixels_tab[1][2];
     c->avg_pixels_tab[1][ 3] = avg_rv40_qpel8_mc30_c;
     c->avg_pixels_tab[1][ 4] = avg_rv40_qpel8_mc01_c;
     c->avg_pixels_tab[1][ 5] = avg_rv40_qpel8_mc11_c;
     c->avg_pixels_tab[1][ 6] = avg_rv40_qpel8_mc21_c;
     c->avg_pixels_tab[1][ 7] = avg_rv40_qpel8_mc31_c;
-    c->avg_pixels_tab[1][ 8] = avg_rv40_qpel8_mc02_c;
+    c->avg_pixels_tab[1][ 8] = dsp->avg_h264_qpel_pixels_tab[1][8];
     c->avg_pixels_tab[1][ 9] = avg_rv40_qpel8_mc12_c;
     c->avg_pixels_tab[1][10] = avg_rv40_qpel8_mc22_c;
     c->avg_pixels_tab[1][11] = avg_rv40_qpel8_mc32_c;