vc1: Split the decoder in components

Speed up the overall compilation time.

libavcodec/Makefile

@@ -390,7 +390,9 @@ OBJS-$(CONFIG_V410_ENCODER)            += v410enc.o
 OBJS-$(CONFIG_V210X_DECODER)           += v210x.o
 OBJS-$(CONFIG_VB_DECODER)              += vb.o
 OBJS-$(CONFIG_VBLE_DECODER)            += vble.o
-OBJS-$(CONFIG_VC1_DECODER)             += vc1dec.o vc1.o vc1data.o vc1dsp.o \
+OBJS-$(CONFIG_VC1_DECODER)             += vc1dec.o vc1_block.o vc1_loopfilter.o \
+                                          vc1_mc.o vc1_pred.o vc1.o vc1data.o \
+                                          vc1dsp.o \
                                           msmpeg4dec.o msmpeg4.o msmpeg4data.o
 OBJS-$(CONFIG_VCR1_DECODER)            += vcr1.o
 OBJS-$(CONFIG_VMDAUDIO_DECODER)        += vmdaudio.o

libavcodec/vc1.h

@@ -400,4 +400,16 @@ void ff_vc1_init_transposed_scantables(VC1Context *v);
 int  ff_vc1_decode_end(AVCodecContext *avctx);
 void ff_vc1_decode_blocks(VC1Context *v);
 
+void ff_vc1_loop_filter_iblk(VC1Context *v, int pq);
+void ff_vc1_loop_filter_iblk_delayed(VC1Context *v, int pq);
+void ff_vc1_smooth_overlap_filter_iblk(VC1Context *v);
+void ff_vc1_apply_p_loop_filter(VC1Context *v);
+
+void ff_vc1_mc_1mv(VC1Context *v, int dir);
+void ff_vc1_mc_4mv_luma(VC1Context *v, int n, int dir, int avg);
+void ff_vc1_mc_4mv_chroma(VC1Context *v, int dir);
+void ff_vc1_mc_4mv_chroma4(VC1Context *v, int dir, int dir2, int avg);
+
+void ff_vc1_interp_mc(VC1Context *v);
+
 #endif /* AVCODEC_VC1_H */

libavcodec/vc1_pred.h

+/*
+ * VC-1 and WMV3 decoder
+ * Copyright (c) 2006-2007 Konstantin Shishkov
+ * Partly based on vc9.c (c) 2005 Anonymous, Alex Beregszaszi, Michael Niedermayer
+ *
+ * This file is part of Libav.
+ *
+ * Libav is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * Libav is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVCODEC_VC1_PRED_H
+#define AVCODEC_VC1_PRED_H
+
+#include "vc1.h"
+#include "vc1data.h"
+
+void ff_vc1_pred_mv(VC1Context *v, int n, int dmv_x, int dmv_y,
+                    int mv1, int r_x, int r_y, uint8_t* is_intra,
+                    int pred_flag, int dir);
+void ff_vc1_pred_mv_intfr(VC1Context *v, int n, int dmv_x, int dmv_y,
+                          int mvn, int r_x, int r_y, uint8_t* is_intra,
+                          int dir);
+void ff_vc1_pred_b_mv(VC1Context *v, int dmv_x[2], int dmv_y[2],
+                      int direct, int mvtype);
+void ff_vc1_pred_b_mv_intfi(VC1Context *v, int n, int *dmv_x, int *dmv_y,
+                            int mv1, int *pred_flag);
+
+static av_always_inline int scale_mv(int value, int bfrac, int inv, int qs)
+{
+    int n = bfrac;
+
+#if B_FRACTION_DEN==256
+    if (inv)
+        n -= 256;
+    if (!qs)
+        return 2 * ((value * n + 255) >> 9);
+    return (value * n + 128) >> 8;
+#else
+    if (inv)
+        n -= B_FRACTION_DEN;
+    if (!qs)
+        return 2 * ((value * n + B_FRACTION_DEN - 1) / (2 * B_FRACTION_DEN));
+    return (value * n + B_FRACTION_DEN/2) / B_FRACTION_DEN;
+#endif
+}
+
+#endif /* AVCODEC_VC1_PRED_H */

libavcodec/vc1data.h

@@ -94,8 +94,6 @@ extern VLC ff_vc1_ac_coeff_table[8];
 #define VC1_IF_MBMODE_VLC_BITS 5
 //@}
 
-
-/* Denominator used for ff_vc1_bfraction_lut */
 #define B_FRACTION_DEN  256
 
 /* pre-computed scales for all bfractions and base=256 */