[FFmpeg-devel] [PATCHv4 2/4] lavc/mpegvideo: use H263DSP dequant function

[Rémi Denis-Courmont]

---
 libavcodec/mpegvideo.c | 40 +++++++++-------------------------------
 1 file changed, 9 insertions(+), 31 deletions(-)

diff --git a/libavcodec/mpegvideo.c b/libavcodec/mpegvideo.c
index 7af823b8bd..810888fc47 100644
--- a/libavcodec/mpegvideo.c
+++ b/libavcodec/mpegvideo.c
@@ -201,13 +201,11 @@ static void dct_unquantize_mpeg2_inter_c(MpegEncContext 
*s,
 static void dct_unquantize_h263_intra_c(MpegEncContext *s,
                                   int16_t *block, int n, int qscale)
 {
-    int i, level, qmul, qadd;
-    int nCoeffs;
+    int qmul = qscale << 1;
+    int qadd, nCoeffs;
 
     av_assert2(s->block_last_index[n]>=0 || s->h263_aic);
 
-    qmul = qscale << 1;
-
     if (!s->h263_aic) {
         block[0] *= n < 4 ? s->y_dc_scale : s->c_dc_scale;
         qadd = (qscale - 1) | 1;
@@ -219,43 +217,20 @@ static void dct_unquantize_h263_intra_c(MpegEncContext *s,
     else
         nCoeffs= s->intra_scantable.raster_end[ s->block_last_index[n] ];
 
-    for(i=1; i<=nCoeffs; i++) {
-        level = block[i];
-        if (level) {
-            if (level < 0) {
-                level = level * qmul - qadd;
-            } else {
-                level = level * qmul + qadd;
-            }
-            block[i] = level;
-        }
-    }
+    s->h263dsp.h263_dct_unquantize_intra(block, nCoeffs, qmul, qadd);
 }
 
 static void dct_unquantize_h263_inter_c(MpegEncContext *s,
                                   int16_t *block, int n, int qscale)
 {
-    int i, level, qmul, qadd;
+    int qmul = qscale << 1;
+    int qadd = (qscale - 1) | 1;
     int nCoeffs;
 
     av_assert2(s->block_last_index[n]>=0);
 
-    qadd = (qscale - 1) | 1;
-    qmul = qscale << 1;
-
     nCoeffs= s->inter_scantable.raster_end[ s->block_last_index[n] ];
-
-    for(i=0; i<=nCoeffs; i++) {
-        level = block[i];
-        if (level) {
-            if (level < 0) {
-                level = level * qmul - qadd;
-            } else {
-                level = level * qmul + qadd;
-            }
-            block[i] = level;
-        }
-    }
+    s->h263dsp.h263_dct_unquantize_inter(block, nCoeffs, qmul, qadd);
 }
 
 
@@ -275,6 +250,9 @@ static void gray8(uint8_t *dst, const uint8_t *src, 
ptrdiff_t linesize, int h)
 static av_cold int dct_init(MpegEncContext *s)
 {
     ff_blockdsp_init(&s->bdsp);
+#if CONFIG_H263DSP
+    ff_h263dsp_init(&s->h263dsp);
+#endif
     ff_hpeldsp_init(&s->hdsp, s->avctx->flags);
     ff_videodsp_init(&s->vdsp, s->avctx->bits_per_raw_sample);
 
-- 
2.45.1

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