Fix VC-1 playback with pulldown content

[ffmpeg] / libavcodec / vc1.c

diff --git a/libavcodec/vc1.c b/libavcodec/vc1.c
index 8bd6647f130c01d27184efe5e6f25e58efb8bc14..73f0cba042b32b82596dc8b7ea2aa2175d951125 100644 (file)
--- a/libavcodec/vc1.c
+++ b/libavcodec/vc1.c
@@ -280,6 +280,28 @@ static int vop_dquant_decoding(VC1Context *v)
 
 static int decode_sequence_header_adv(VC1Context *v, GetBitContext *gb);
 
+static void simple_idct_put_rangered(uint8_t *dest, int line_size, DCTELEM *block)
+{
+    int i;
+    ff_simple_idct(block);
+    for (i = 0; i < 64; i++) block[i] = (block[i] - 64) << 1;
+    ff_put_pixels_clamped_c(block, dest, line_size);
+}
+
+static void simple_idct_put_signed(uint8_t *dest, int line_size, DCTELEM *block)
+{
+    ff_simple_idct(block);
+    ff_put_signed_pixels_clamped_c(block, dest, line_size);
+}
+
+static void simple_idct_put_signed_rangered(uint8_t *dest, int line_size, DCTELEM *block)
+{
+    int i;
+    ff_simple_idct(block);
+    for (i = 0; i < 64; i++) block[i] <<= 1;
+    ff_put_signed_pixels_clamped_c(block, dest, line_size);
+}
+
 /**
  * Decode Simple/Main Profiles sequence header
  * @see Figure 7-8, p16-17
@@ -337,7 +359,11 @@ int vc1_decode_sequence_header(AVCodecContext *avctx, VC1Context *v, GetBitConte
     v->res_fasttx = get_bits1(gb);
     if (!v->res_fasttx)
     {
-        v->vc1dsp.vc1_inv_trans_8x8 = ff_simple_idct;
+        v->vc1dsp.vc1_inv_trans_8x8_add = ff_simple_idct_add;
+        v->vc1dsp.vc1_inv_trans_8x8_put[0] = ff_simple_idct_put;
+        v->vc1dsp.vc1_inv_trans_8x8_put[1] = simple_idct_put_rangered;
+        v->vc1dsp.vc1_inv_trans_8x8_put_signed[0] = simple_idct_put_signed;
+        v->vc1dsp.vc1_inv_trans_8x8_put_signed[1] = simple_idct_put_signed_rangered;
         v->vc1dsp.vc1_inv_trans_8x4 = ff_simple_idct84_add;
         v->vc1dsp.vc1_inv_trans_4x8 = ff_simple_idct48_add;
         v->vc1dsp.vc1_inv_trans_4x4 = ff_simple_idct44_add;
@@ -833,10 +859,11 @@ int vc1_parse_frame_header_adv(VC1Context *v, GetBitContext* gb)
             v->rptfrm = get_bits(gb, 2);
         } else {
             v->tff = get_bits1(gb);
-            v->rptfrm = get_bits1(gb);
+            v->rff = get_bits1(gb);
         }
     }
     if(v->panscanflag) {
+        av_log_missing_feature(v->s.avctx, "Pan-scan", 0);
         //...
     }
     v->rnd = get_bits1(gb);