lavc: implement an ATRAC9 decoder

[ffmpeg] / libavcodec / vc1.c

diff --git a/libavcodec/vc1.c b/libavcodec/vc1.c
index 2b9f8db3ee9773dfdc50d894e0427278265d7071..3581d87b57b152b6a7698d267570c4566a35c9e1 100644 (file)
--- a/libavcodec/vc1.c
+++ b/libavcodec/vc1.c
@@ -314,11 +314,11 @@ int ff_vc1_decode_sequence_header(AVCodecContext *avctx, VC1Context *v, GetBitCo
     v->multires        = get_bits1(gb);
     v->res_fasttx      = get_bits1(gb);
     if (!v->res_fasttx) {
-        v->vc1dsp.vc1_inv_trans_8x8    = ff_simple_idct_8;
+        v->vc1dsp.vc1_inv_trans_8x8    = ff_simple_idct_int16_8bit;
         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;
-        v->vc1dsp.vc1_inv_trans_8x8_dc = ff_simple_idct_add_8;
+        v->vc1dsp.vc1_inv_trans_8x8_dc = ff_simple_idct_add_int16_8bit;
         v->vc1dsp.vc1_inv_trans_8x4_dc = ff_simple_idct84_add;
         v->vc1dsp.vc1_inv_trans_4x8_dc = ff_simple_idct48_add;
         v->vc1dsp.vc1_inv_trans_4x4_dc = ff_simple_idct44_add;
@@ -991,6 +991,7 @@ int ff_vc1_parse_frame_header_adv(VC1Context *v, GetBitContext* gb)
         v->pquantizer = 1;
         break;
     }
+    v->dquantfrm = 0;
     if (v->postprocflag)
         v->postproc = get_bits(gb, 2);
 
@@ -1009,7 +1010,8 @@ int ff_vc1_parse_frame_header_adv(VC1Context *v, GetBitContext* gb)
                 return -1;
             av_log(v->s.avctx, AV_LOG_DEBUG, "FIELDTX plane encoding: "
                    "Imode: %i, Invert: %i\n", status>>1, status&1);
-        }
+        } else
+            v->fieldtx_is_raw = 0;
         status = bitplane_decoding(v->acpred_plane, &v->acpred_is_raw, v);
         if (status < 0)
             return -1;
@@ -1055,6 +1057,8 @@ int ff_vc1_parse_frame_header_adv(VC1Context *v, GetBitContext* gb)
                     v->last_use_ic = 1;
                 }
                 status = bitplane_decoding(v->s.mbskip_table, &v->skip_is_raw, v);
+                if (status < 0)
+                    return -1;
                 av_log(v->s.avctx, AV_LOG_DEBUG, "SKIPMB plane encoding: "
                        "Imode: %i, Invert: %i\n", status>>1, status&1);
                 v->mbmodetab = get_bits(gb, 2);
@@ -1224,7 +1228,7 @@ int ff_vc1_parse_frame_header_adv(VC1Context *v, GetBitContext* gb)
             v->mv_mode          = ff_vc1_mv_pmode_table2[lowquant][mvmode];
             v->qs_last          = v->s.quarter_sample;
             v->s.quarter_sample = (v->mv_mode == MV_PMODE_1MV || v->mv_mode == MV_PMODE_MIXED_MV);
-            v->s.mspel          = !(v->mv_mode == MV_PMODE_1MV_HPEL_BILIN || v->mv_mode == MV_PMODE_1MV_HPEL);
+            v->s.mspel          = (v->mv_mode != MV_PMODE_1MV_HPEL_BILIN);
             status = bitplane_decoding(v->forward_mb_plane, &v->fmb_is_raw, v);
             if (status < 0)
                 return -1;