vp9: re-split the decoder/format/dsp interface header files.

The advantage here is that the internal software decoder interface is
not exposed to the DSP functions or the hardware accelerations.

23 files changed, 362 insertions, 294 deletions

diff --git a/libavcodec/aarch64/vp9dsp_init.h b/libavcodec/aarch64/vp9dsp_init.h
index e288fb4..9df1752 100644
--- a/libavcodec/aarch64/vp9dsp_init.h
+++ b/libavcodec/aarch64/vp9dsp_init.h
@@ -21,7 +21,7 @@
 #ifndef AVCODEC_AARCH64_VP9DSP_INIT_H
 #define AVCODEC_AARCH64_VP9DSP_INIT_H
 
-#include "libavcodec/vp9.h"
+#include "libavcodec/vp9dsp.h"
 
 void ff_vp9dsp_init_10bpp_aarch64(VP9DSPContext *dsp);
 void ff_vp9dsp_init_12bpp_aarch64(VP9DSPContext *dsp);
diff --git a/libavcodec/aarch64/vp9dsp_init_aarch64.c b/libavcodec/aarch64/vp9dsp_init_aarch64.c
index e27c232..91a82d8 100644
--- a/libavcodec/aarch64/vp9dsp_init_aarch64.c
+++ b/libavcodec/aarch64/vp9dsp_init_aarch64.c
@@ -22,7 +22,7 @@
 
 #include "libavutil/attributes.h"
 #include "libavutil/aarch64/cpu.h"
-#include "libavcodec/vp9.h"
+#include "libavcodec/vp9dsp.h"
 #include "vp9dsp_init.h"
 
 #define declare_fpel(type, sz)                                          \
diff --git a/libavcodec/arm/vp9dsp_init.h b/libavcodec/arm/vp9dsp_init.h
index 0047a24..0dc1c2d 100644
--- a/libavcodec/arm/vp9dsp_init.h
+++ b/libavcodec/arm/vp9dsp_init.h
@@ -21,7 +21,7 @@
 #ifndef AVCODEC_ARM_VP9DSP_INIT_H
 #define AVCODEC_ARM_VP9DSP_INIT_H
 
-#include "libavcodec/vp9.h"
+#include "libavcodec/vp9dsp.h"
 
 void ff_vp9dsp_init_10bpp_arm(VP9DSPContext *dsp);
 void ff_vp9dsp_init_12bpp_arm(VP9DSPContext *dsp);
diff --git a/libavcodec/arm/vp9dsp_init_arm.c b/libavcodec/arm/vp9dsp_init_arm.c
index f9245c3..4c57fd6 100644
--- a/libavcodec/arm/vp9dsp_init_arm.c
+++ b/libavcodec/arm/vp9dsp_init_arm.c
@@ -22,7 +22,7 @@
 
 #include "libavutil/attributes.h"
 #include "libavutil/arm/cpu.h"
-#include "libavcodec/vp9.h"
+#include "libavcodec/vp9dsp.h"
 #include "vp9dsp_init.h"
 
 #define declare_fpel(type, sz)                                          \
diff --git a/libavcodec/mips/vp9_idct_msa.c b/libavcodec/mips/vp9_idct_msa.c
index e2b7b3c..25ea16c 100644
--- a/libavcodec/mips/vp9_idct_msa.c
+++ b/libavcodec/mips/vp9_idct_msa.c
@@ -19,7 +19,7 @@
  */
 
 #include <string.h>
-#include "libavcodec/vp9.h"
+#include "libavcodec/vp9dsp.h"
 #include "libavutil/mips/generic_macros_msa.h"
 #include "vp9dsp_mips.h"
 
diff --git a/libavcodec/mips/vp9_intra_msa.c b/libavcodec/mips/vp9_intra_msa.c
index 4097cf4..54cf0ae 100644
--- a/libavcodec/mips/vp9_intra_msa.c
+++ b/libavcodec/mips/vp9_intra_msa.c
@@ -18,7 +18,7 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
-#include "libavcodec/vp9.h"
+#include "libavcodec/vp9dsp.h"
 #include "libavutil/mips/generic_macros_msa.h"
 #include "vp9dsp_mips.h"
 
diff --git a/libavcodec/mips/vp9_lpf_msa.c b/libavcodec/mips/vp9_lpf_msa.c
index 9164dcd..eef8afc 100644
--- a/libavcodec/mips/vp9_lpf_msa.c
+++ b/libavcodec/mips/vp9_lpf_msa.c
@@ -18,7 +18,7 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
-#include "libavcodec/vp9.h"
+#include "libavcodec/vp9dsp.h"
 #include "libavutil/mips/generic_macros_msa.h"
 #include "vp9dsp_mips.h"
 
diff --git a/libavcodec/mips/vp9_mc_msa.c b/libavcodec/mips/vp9_mc_msa.c
index 52207b6..1671d97 100644
--- a/libavcodec/mips/vp9_mc_msa.c
+++ b/libavcodec/mips/vp9_mc_msa.c
@@ -18,7 +18,7 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
-#include "libavcodec/vp9.h"
+#include "libavcodec/vp9dsp.h"
 #include "libavutil/mips/generic_macros_msa.h"
 #include "vp9dsp_mips.h"
 
diff --git a/libavcodec/mips/vp9dsp_init_mips.c b/libavcodec/mips/vp9dsp_init_mips.c
index 3248baa..c8a4890 100644
--- a/libavcodec/mips/vp9dsp_init_mips.c
+++ b/libavcodec/mips/vp9dsp_init_mips.c
@@ -20,7 +20,7 @@
 
 #include "config.h"
 #include "libavutil/common.h"
-#include "libavcodec/vp9.h"
+#include "libavcodec/vp9dsp.h"
 #include "vp9dsp_mips.h"
 
 #if HAVE_MSA
diff --git a/libavcodec/vp9.c b/libavcodec/vp9.c
index 202b29e..01b6a1b 100644
--- a/libavcodec/vp9.c
+++ b/libavcodec/vp9.c
@@ -30,7 +30,7 @@
 #include "vp56.h"
 #include "vp9.h"
 #include "vp9data.h"
-#include "vp9.h"
+#include "vp9dec.h"
 #include "libavutil/avassert.h"
 #include "libavutil/pixdesc.h"
 
diff --git a/libavcodec/vp9.h b/libavcodec/vp9.h
index a206730..6d2abaf 100644
--- a/libavcodec/vp9.h
+++ b/libavcodec/vp9.h
@@ -27,9 +27,6 @@
 #include <stddef.h>
 #include <stdint.h>
 
-#include "libavutil/buffer.h"
-#include "libavutil/internal.h"
-
 #include "avcodec.h"
 #include "thread.h"
 #include "vp56.h"
@@ -93,131 +90,6 @@ enum InterPredMode {
     NEWMV     = 13,
 };
 
-enum MVJoint {
-    MV_JOINT_ZERO,
-    MV_JOINT_H,
-    MV_JOINT_V,
-    MV_JOINT_HV,
-};
-
-typedef struct ProbContext {
-    uint8_t y_mode[4][9];
-    uint8_t uv_mode[10][9];
-    uint8_t filter[4][2];
-    uint8_t mv_mode[7][3];
-    uint8_t intra[4];
-    uint8_t comp[5];
-    uint8_t single_ref[5][2];
-    uint8_t comp_ref[5];
-    uint8_t tx32p[2][3];
-    uint8_t tx16p[2][2];
-    uint8_t tx8p[2];
-    uint8_t skip[3];
-    uint8_t mv_joint[3];
-    struct {
-        uint8_t sign;
-        uint8_t classes[10];
-        uint8_t class0;
-        uint8_t bits[10];
-        uint8_t class0_fp[2][3];
-        uint8_t fp[3];
-        uint8_t class0_hp;
-        uint8_t hp;
-    } mv_comp[2];
-    uint8_t partition[4][4][3];
-} ProbContext;
-
-typedef void (*vp9_mc_func)(uint8_t *dst, ptrdiff_t dst_stride,
-                            const uint8_t *ref, ptrdiff_t ref_stride,
-                            int h, int mx, int my);
-typedef void (*vp9_scaled_mc_func)(uint8_t *dst, ptrdiff_t dst_stride,
-                                   const uint8_t *ref, ptrdiff_t ref_stride,
-                                   int h, int mx, int my, int dx, int dy);
-
-typedef struct VP9DSPContext {
-    /*
-     * dimension 1: 0=4x4, 1=8x8, 2=16x16, 3=32x32
-     * dimension 2: intra prediction modes
-     *
-     * dst/left/top is aligned by transform-size (i.e. 4, 8, 16 or 32 pixels)
-     * stride is aligned by 16 pixels
-     * top[-1] is top/left; top[4,7] is top-right for 4x4
-     */
-    // FIXME(rbultje) maybe replace left/top pointers with HAVE_TOP/
-    // HAVE_LEFT/HAVE_TOPRIGHT flags instead, and then handle it in-place?
-    // also needs to fit in with what H.264/VP8/etc do
-    void (*intra_pred[N_TXFM_SIZES][N_INTRA_PRED_MODES])(uint8_t *dst,
-                                                         ptrdiff_t stride,
-                                                         const uint8_t *left,
-                                                         const uint8_t *top);
-
-    /*
-     * dimension 1: 0=4x4, 1=8x8, 2=16x16, 3=32x32, 4=lossless (3-4=dct only)
-     * dimension 2: 0=dct/dct, 1=dct/adst, 2=adst/dct, 3=adst/adst
-     *
-     * dst is aligned by transform-size (i.e. 4, 8, 16 or 32 pixels)
-     * stride is aligned by 16 pixels
-     * block is 16-byte aligned
-     * eob indicates the position (+1) of the last non-zero coefficient,
-     * in scan-order. This can be used to write faster versions, e.g. a
-     * dc-only 4x4/8x8/16x16/32x32, or a 4x4-only (eob<10) 8x8/16x16/32x32,
-     * etc.
-     */
-    // FIXME also write idct_add_block() versions for whole (inter) pred
-    // blocks, so we can do 2 4x4s at once
-    void (*itxfm_add[N_TXFM_SIZES + 1][N_TXFM_TYPES])(uint8_t *dst,
-                                                      ptrdiff_t stride,
-                                                      int16_t *block, int eob);
-
-    /*
-     * dimension 1: width of filter (0=4, 1=8, 2=16)
-     * dimension 2: 0=col-edge filter (h), 1=row-edge filter (v)
-     *
-     * dst/stride are aligned by 8
-     */
-    void (*loop_filter_8[3][2])(uint8_t *dst, ptrdiff_t stride,
-                                int mb_lim, int lim, int hev_thr);
-
-    /*
-     * dimension 1: 0=col-edge filter (h), 1=row-edge filter (v)
-     *
-     * The width of filter is assumed to be 16; dst/stride are aligned by 16
-     */
-    void (*loop_filter_16[2])(uint8_t *dst, ptrdiff_t stride,
-                              int mb_lim, int lim, int hev_thr);
-
-    /*
-     * dimension 1/2: width of filter (0=4, 1=8) for each filter half
-     * dimension 3: 0=col-edge filter (h), 1=row-edge filter (v)
-     *
-     * dst/stride are aligned by operation size
-     * this basically calls loop_filter[d1][d3][0](), followed by
-     * loop_filter[d2][d3][0]() on the next 8 pixels
-     * mb_lim/lim/hev_thr contain two values in the lowest two bytes of the
-     * integer.
-     */
-    // FIXME perhaps a mix4 that operates on 32px (for AVX2)
-    void (*loop_filter_mix2[2][2][2])(uint8_t *dst, ptrdiff_t stride,
-                                      int mb_lim, int lim, int hev_thr);
-
-    /*
-     * dimension 1: hsize (0: 64, 1: 32, 2: 16, 3: 8, 4: 4)
-     * dimension 2: filter type (0: smooth, 1: regular, 2: sharp, 3: bilin)
-     * dimension 3: averaging type (0: put, 1: avg)
-     * dimension 4: x subpel interpolation (0: none, 1: 8tap/bilin)
-     * dimension 5: y subpel interpolation (0: none, 1: 8tap/bilin)
-     *
-     * dst/stride are aligned by hsize
-     */
-    vp9_mc_func mc[5][4][2][2][2];
-
-    /*
-     * for scalable MC, first 3 dimensions identical to above, the other two
-     * don't exist since it changes per stepsize.
-     */
-    vp9_scaled_mc_func smc[5][4][2];
-} VP9DSPContext;
-
 enum CompPredMode {
     PRED_SINGLEREF,
     PRED_COMPREF,
@@ -229,12 +101,6 @@ typedef struct VP9mvrefPair {
     int8_t ref[2];
 } VP9mvrefPair;
 
-typedef struct VP9Filter {
-    uint8_t level[8 * 8];
-    uint8_t /* bit=col */ mask[2 /* 0=y, 1=uv */][2 /* 0=col, 1=row */]
-                              [8 /* rows */][4 /* 0=16, 1=8, 2=4, 3=inner4 */];
-} VP9Filter;
-
 typedef struct VP9Frame {
     ThreadFrame tf;
     AVBufferRef *extradata;
@@ -270,16 +136,6 @@ enum BlockSize {
     N_BS_SIZES,
 };
 
-typedef struct VP9Block {
-    uint8_t seg_id, intra, comp, ref[2], mode[4], uvmode, skip;
-    enum FilterMode filter;
-    VP56mv mv[4 /* b_idx */][2 /* ref */];
-    enum BlockSize bs;
-    enum TxfmMode tx, uvtx;
-    enum BlockLevel bl;
-    enum BlockPartition bp;
-} VP9Block;
-
 typedef struct VP9BitstreamHeader {
     // bitstream header
     uint8_t profile;
@@ -355,137 +211,4 @@ typedef struct VP9SharedContext {
     VP9Frame frames[3];
 } VP9SharedContext;
 
-typedef struct VP9Context {
-    VP9SharedContext s;
-
-    VP9DSPContext dsp;
-    VideoDSPContext vdsp;
-    GetBitContext gb;
-    VP56RangeCoder c;
-    VP56RangeCoder *c_b;
-    unsigned c_b_size;
-    VP9Block *b_base, *b;
-    int pass;
-    int row, row7, col, col7;
-    uint8_t *dst[3];
-    ptrdiff_t y_stride, uv_stride;
-
-    uint8_t ss_h, ss_v;
-    uint8_t last_bpp, bpp_index, bytesperpixel;
-    uint8_t last_keyframe;
-    // sb_cols/rows, rows/cols and last_fmt are used for allocating all internal
-    // arrays, and are thus per-thread. w/h and gf_fmt are synced between threads
-    // and are therefore per-stream. pix_fmt represents the value in the header
-    // of the currently processed frame.
-    int w, h;
-    enum AVPixelFormat pix_fmt, last_fmt, gf_fmt;
-    unsigned sb_cols, sb_rows, rows, cols;
-    ThreadFrame next_refs[8];
-
-    struct {
-        uint8_t lim_lut[64];
-        uint8_t mblim_lut[64];
-    } filter_lut;
-    unsigned tile_row_start, tile_row_end, tile_col_start, tile_col_end;
-    struct {
-        ProbContext p;
-        uint8_t coef[4][2][2][6][6][3];
-    } prob_ctx[4];
-    struct {
-        ProbContext p;
-        uint8_t coef[4][2][2][6][6][11];
-    } prob;
-    struct {
-        unsigned y_mode[4][10];
-        unsigned uv_mode[10][10];
-        unsigned filter[4][3];
-        unsigned mv_mode[7][4];
-        unsigned intra[4][2];
-        unsigned comp[5][2];
-        unsigned single_ref[5][2][2];
-        unsigned comp_ref[5][2];
-        unsigned tx32p[2][4];
-        unsigned tx16p[2][3];
-        unsigned tx8p[2][2];
-        unsigned skip[3][2];
-        unsigned mv_joint[4];
-        struct {
-            unsigned sign[2];
-            unsigned classes[11];
-            unsigned class0[2];
-            unsigned bits[10][2];
-            unsigned class0_fp[2][4];
-            unsigned fp[4];
-            unsigned class0_hp[2];
-            unsigned hp[2];
-        } mv_comp[2];
-        unsigned partition[4][4][4];
-        unsigned coef[4][2][2][6][6][3];
-        unsigned eob[4][2][2][6][6][2];
-    } counts;
-
-    // contextual (left/above) cache
-    DECLARE_ALIGNED(16, uint8_t, left_y_nnz_ctx)[16];
-    DECLARE_ALIGNED(16, uint8_t, left_mode_ctx)[16];
-    DECLARE_ALIGNED(16, VP56mv, left_mv_ctx)[16][2];
-    DECLARE_ALIGNED(16, uint8_t, left_uv_nnz_ctx)[2][16];
-    DECLARE_ALIGNED(8, uint8_t, left_partition_ctx)[8];
-    DECLARE_ALIGNED(8, uint8_t, left_skip_ctx)[8];
-    DECLARE_ALIGNED(8, uint8_t, left_txfm_ctx)[8];
-    DECLARE_ALIGNED(8, uint8_t, left_segpred_ctx)[8];
-    DECLARE_ALIGNED(8, uint8_t, left_intra_ctx)[8];
-    DECLARE_ALIGNED(8, uint8_t, left_comp_ctx)[8];
-    DECLARE_ALIGNED(8, uint8_t, left_ref_ctx)[8];
-    DECLARE_ALIGNED(8, uint8_t, left_filter_ctx)[8];
-    uint8_t *above_partition_ctx;
-    uint8_t *above_mode_ctx;
-    // FIXME maybe merge some of the below in a flags field?
-    uint8_t *above_y_nnz_ctx;
-    uint8_t *above_uv_nnz_ctx[2];
-    uint8_t *above_skip_ctx; // 1bit
-    uint8_t *above_txfm_ctx; // 2bit
-    uint8_t *above_segpred_ctx; // 1bit
-    uint8_t *above_intra_ctx; // 1bit
-    uint8_t *above_comp_ctx; // 1bit
-    uint8_t *above_ref_ctx; // 2bit
-    uint8_t *above_filter_ctx;
-    VP56mv (*above_mv_ctx)[2];
-
-    // whole-frame cache
-    uint8_t *intra_pred_data[3];
-    VP9Filter *lflvl;
-    DECLARE_ALIGNED(32, uint8_t, edge_emu_buffer)[135 * 144 * 2];
-
-    // block reconstruction intermediates
-    int block_alloc_using_2pass;
-    int16_t *block_base, *block, *uvblock_base[2], *uvblock[2];
-    uint8_t *eob_base, *uveob_base[2], *eob, *uveob[2];
-    struct { int x, y; } min_mv, max_mv;
-    DECLARE_ALIGNED(32, uint8_t, tmp_y)[64 * 64 * 2];
-    DECLARE_ALIGNED(32, uint8_t, tmp_uv)[2][64 * 64 * 2];
-    uint16_t mvscale[3][2];
-    uint8_t mvstep[3][2];
-} VP9Context;
-
-extern const int16_t ff_vp9_subpel_filters[3][16][8];
-
-void ff_vp9dsp_init(VP9DSPContext *dsp, int bpp, int bitexact);
-
-void ff_vp9dsp_init_8(VP9DSPContext *dsp);
-void ff_vp9dsp_init_10(VP9DSPContext *dsp);
-void ff_vp9dsp_init_12(VP9DSPContext *dsp);
-
-void ff_vp9dsp_init_aarch64(VP9DSPContext *dsp, int bpp);
-void ff_vp9dsp_init_arm(VP9DSPContext *dsp, int bpp);
-void ff_vp9dsp_init_x86(VP9DSPContext *dsp, int bpp, int bitexact);
-void ff_vp9dsp_init_mips(VP9DSPContext *dsp, int bpp);
-
-void ff_vp9_fill_mv(VP9Context *s, VP56mv *mv, int mode, int sb);
-
-void ff_vp9_adapt_probs(VP9Context *s);
-
-void ff_vp9_decode_block(AVCodecContext *ctx, int row, int col,
-                         VP9Filter *lflvl, ptrdiff_t yoff, ptrdiff_t uvoff,
-                         enum BlockLevel bl, enum BlockPartition bp);
-
 #endif /* AVCODEC_VP9_H */
diff --git a/libavcodec/vp9block.c b/libavcodec/vp9block.c
index e5e1171..f91ef1a 100644
--- a/libavcodec/vp9block.c
+++ b/libavcodec/vp9block.c
@@ -29,6 +29,7 @@
 #include "vp56.h"
 #include "vp9.h"
 #include "vp9data.h"
+#include "vp9dec.h"
 
 static const uint8_t bwh_tab[2][N_BS_SIZES][2] = {
     {
diff --git a/libavcodec/vp9data.h b/libavcodec/vp9data.h
index 084e882..f27ab0b 100644
--- a/libavcodec/vp9data.h
+++ b/libavcodec/vp9data.h
@@ -24,7 +24,7 @@
 
 #include <stdint.h>
 
-#include "vp9.h"
+#include "vp9dec.h"
 
 extern const int8_t ff_vp9_partition_tree[3][2];
 extern const uint8_t ff_vp9_default_kf_partition_probs[4][4][3];
diff --git a/libavcodec/vp9dec.h b/libavcodec/vp9dec.h
new file mode 100644
index 0000000..ba821f3
--- /dev/null
+++ b/libavcodec/vp9dec.h
@@ -0,0 +1,206 @@
+/*
+ * VP9 compatible video decoder
+ *
+ * Copyright (C) 2013 Ronald S. Bultje <rsbultje gmail com>
+ * Copyright (C) 2013 Clément Bœsch <u pkh me>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg 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.
+ *
+ * FFmpeg 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 FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVCODEC_VP9DEC_H
+#define AVCODEC_VP9DEC_H
+
+#include <stddef.h>
+#include <stdint.h>
+
+#include "libavutil/buffer.h"
+#include "libavutil/internal.h"
+
+#include "vp9.h"
+#include "vp9dsp.h"
+
+enum MVJoint {
+    MV_JOINT_ZERO,
+    MV_JOINT_H,
+    MV_JOINT_V,
+    MV_JOINT_HV,
+};
+
+typedef struct ProbContext {
+    uint8_t y_mode[4][9];
+    uint8_t uv_mode[10][9];
+    uint8_t filter[4][2];
+    uint8_t mv_mode[7][3];
+    uint8_t intra[4];
+    uint8_t comp[5];
+    uint8_t single_ref[5][2];
+    uint8_t comp_ref[5];
+    uint8_t tx32p[2][3];
+    uint8_t tx16p[2][2];
+    uint8_t tx8p[2];
+    uint8_t skip[3];
+    uint8_t mv_joint[3];
+    struct {
+        uint8_t sign;
+        uint8_t classes[10];
+        uint8_t class0;
+        uint8_t bits[10];
+        uint8_t class0_fp[2][3];
+        uint8_t fp[3];
+        uint8_t class0_hp;
+        uint8_t hp;
+    } mv_comp[2];
+    uint8_t partition[4][4][3];
+} ProbContext;
+
+typedef struct VP9Filter {
+    uint8_t level[8 * 8];
+    uint8_t /* bit=col */ mask[2 /* 0=y, 1=uv */][2 /* 0=col, 1=row */]
+                              [8 /* rows */][4 /* 0=16, 1=8, 2=4, 3=inner4 */];
+} VP9Filter;
+
+typedef struct VP9Block {
+    uint8_t seg_id, intra, comp, ref[2], mode[4], uvmode, skip;
+    enum FilterMode filter;
+    VP56mv mv[4 /* b_idx */][2 /* ref */];
+    enum BlockSize bs;
+    enum TxfmMode tx, uvtx;
+    enum BlockLevel bl;
+    enum BlockPartition bp;
+} VP9Block;
+
+typedef struct VP9Context {
+    VP9SharedContext s;
+
+    VP9DSPContext dsp;
+    VideoDSPContext vdsp;
+    GetBitContext gb;
+    VP56RangeCoder c;
+    VP56RangeCoder *c_b;
+    unsigned c_b_size;
+    VP9Block *b_base, *b;
+    int pass;
+    int row, row7, col, col7;
+    uint8_t *dst[3];
+    ptrdiff_t y_stride, uv_stride;
+
+    uint8_t ss_h, ss_v;
+    uint8_t last_bpp, bpp_index, bytesperpixel;
+    uint8_t last_keyframe;
+    // sb_cols/rows, rows/cols and last_fmt are used for allocating all internal
+    // arrays, and are thus per-thread. w/h and gf_fmt are synced between threads
+    // and are therefore per-stream. pix_fmt represents the value in the header
+    // of the currently processed frame.
+    int w, h;
+    enum AVPixelFormat pix_fmt, last_fmt, gf_fmt;
+    unsigned sb_cols, sb_rows, rows, cols;
+    ThreadFrame next_refs[8];
+
+    struct {
+        uint8_t lim_lut[64];
+        uint8_t mblim_lut[64];
+    } filter_lut;
+    unsigned tile_row_start, tile_row_end, tile_col_start, tile_col_end;
+    struct {
+        ProbContext p;
+        uint8_t coef[4][2][2][6][6][3];
+    } prob_ctx[4];
+    struct {
+        ProbContext p;
+        uint8_t coef[4][2][2][6][6][11];
+    } prob;
+    struct {
+        unsigned y_mode[4][10];
+        unsigned uv_mode[10][10];
+        unsigned filter[4][3];
+        unsigned mv_mode[7][4];
+        unsigned intra[4][2];
+        unsigned comp[5][2];
+        unsigned single_ref[5][2][2];
+        unsigned comp_ref[5][2];
+        unsigned tx32p[2][4];
+        unsigned tx16p[2][3];
+        unsigned tx8p[2][2];
+        unsigned skip[3][2];
+        unsigned mv_joint[4];
+        struct {
+            unsigned sign[2];
+            unsigned classes[11];
+            unsigned class0[2];
+            unsigned bits[10][2];
+            unsigned class0_fp[2][4];
+            unsigned fp[4];
+            unsigned class0_hp[2];
+            unsigned hp[2];
+        } mv_comp[2];
+        unsigned partition[4][4][4];
+        unsigned coef[4][2][2][6][6][3];
+        unsigned eob[4][2][2][6][6][2];
+    } counts;
+
+    // contextual (left/above) cache
+    DECLARE_ALIGNED(16, uint8_t, left_y_nnz_ctx)[16];
+    DECLARE_ALIGNED(16, uint8_t, left_mode_ctx)[16];
+    DECLARE_ALIGNED(16, VP56mv, left_mv_ctx)[16][2];
+    DECLARE_ALIGNED(16, uint8_t, left_uv_nnz_ctx)[2][16];
+    DECLARE_ALIGNED(8, uint8_t, left_partition_ctx)[8];
+    DECLARE_ALIGNED(8, uint8_t, left_skip_ctx)[8];
+    DECLARE_ALIGNED(8, uint8_t, left_txfm_ctx)[8];
+    DECLARE_ALIGNED(8, uint8_t, left_segpred_ctx)[8];
+    DECLARE_ALIGNED(8, uint8_t, left_intra_ctx)[8];
+    DECLARE_ALIGNED(8, uint8_t, left_comp_ctx)[8];
+    DECLARE_ALIGNED(8, uint8_t, left_ref_ctx)[8];
+    DECLARE_ALIGNED(8, uint8_t, left_filter_ctx)[8];
+    uint8_t *above_partition_ctx;
+    uint8_t *above_mode_ctx;
+    // FIXME maybe merge some of the below in a flags field?
+    uint8_t *above_y_nnz_ctx;
+    uint8_t *above_uv_nnz_ctx[2];
+    uint8_t *above_skip_ctx; // 1bit
+    uint8_t *above_txfm_ctx; // 2bit
+    uint8_t *above_segpred_ctx; // 1bit
+    uint8_t *above_intra_ctx; // 1bit
+    uint8_t *above_comp_ctx; // 1bit
+    uint8_t *above_ref_ctx; // 2bit
+    uint8_t *above_filter_ctx;
+    VP56mv (*above_mv_ctx)[2];
+
+    // whole-frame cache
+    uint8_t *intra_pred_data[3];
+    VP9Filter *lflvl;
+    DECLARE_ALIGNED(32, uint8_t, edge_emu_buffer)[135 * 144 * 2];
+
+    // block reconstruction intermediates
+    int block_alloc_using_2pass;
+    int16_t *block_base, *block, *uvblock_base[2], *uvblock[2];
+    uint8_t *eob_base, *uveob_base[2], *eob, *uveob[2];
+    struct { int x, y; } min_mv, max_mv;
+    DECLARE_ALIGNED(32, uint8_t, tmp_y)[64 * 64 * 2];
+    DECLARE_ALIGNED(32, uint8_t, tmp_uv)[2][64 * 64 * 2];
+    uint16_t mvscale[3][2];
+    uint8_t mvstep[3][2];
+} VP9Context;
+
+void ff_vp9_fill_mv(VP9Context *s, VP56mv *mv, int mode, int sb);
+
+void ff_vp9_adapt_probs(VP9Context *s);
+
+void ff_vp9_decode_block(AVCodecContext *ctx, int row, int col,
+                         VP9Filter *lflvl, ptrdiff_t yoff, ptrdiff_t uvoff,
+                         enum BlockLevel bl, enum BlockPartition bp);
+
+#endif /* AVCODEC_VP9DEC_H */
diff --git a/libavcodec/vp9dsp.c b/libavcodec/vp9dsp.c
index cf9de4a..f6d73f7 100644
--- a/libavcodec/vp9dsp.c
+++ b/libavcodec/vp9dsp.c
@@ -23,7 +23,7 @@
 
 #include "libavutil/avassert.h"
 #include "libavutil/common.h"
-#include "vp9.h"
+#include "vp9dsp.h"
 
 const DECLARE_ALIGNED(16, int16_t, ff_vp9_subpel_filters)[3][16][8] = {
     [FILTER_8TAP_REGULAR] = {
diff --git a/libavcodec/vp9dsp.h b/libavcodec/vp9dsp.h
new file mode 100644
index 0000000..d2c48b4
--- /dev/null
+++ b/libavcodec/vp9dsp.h
@@ -0,0 +1,136 @@
+/*
+ * VP9 compatible video decoder
+ *
+ * Copyright (C) 2013 Ronald S. Bultje <rsbultje gmail com>
+ * Copyright (C) 2013 Clément Bœsch <u pkh me>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg 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.
+ *
+ * FFmpeg 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 FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVCODEC_VP9DSP_H
+#define AVCODEC_VP9DSP_H
+
+#include <stddef.h>
+#include <stdint.h>
+
+#include "libavcodec/vp9.h"
+
+typedef void (*vp9_mc_func)(uint8_t *dst, ptrdiff_t dst_stride,
+                            const uint8_t *ref, ptrdiff_t ref_stride,
+                            int h, int mx, int my);
+typedef void (*vp9_scaled_mc_func)(uint8_t *dst, ptrdiff_t dst_stride,
+                                   const uint8_t *ref, ptrdiff_t ref_stride,
+                                   int h, int mx, int my, int dx, int dy);
+
+typedef struct VP9DSPContext {
+    /*
+     * dimension 1: 0=4x4, 1=8x8, 2=16x16, 3=32x32
+     * dimension 2: intra prediction modes
+     *
+     * dst/left/top is aligned by transform-size (i.e. 4, 8, 16 or 32 pixels)
+     * stride is aligned by 16 pixels
+     * top[-1] is top/left; top[4,7] is top-right for 4x4
+     */
+    // FIXME(rbultje) maybe replace left/top pointers with HAVE_TOP/
+    // HAVE_LEFT/HAVE_TOPRIGHT flags instead, and then handle it in-place?
+    // also needs to fit in with what H.264/VP8/etc do
+    void (*intra_pred[N_TXFM_SIZES][N_INTRA_PRED_MODES])(uint8_t *dst,
+                                                         ptrdiff_t stride,
+                                                         const uint8_t *left,
+                                                         const uint8_t *top);
+
+    /*
+     * dimension 1: 0=4x4, 1=8x8, 2=16x16, 3=32x32, 4=lossless (3-4=dct only)
+     * dimension 2: 0=dct/dct, 1=dct/adst, 2=adst/dct, 3=adst/adst
+     *
+     * dst is aligned by transform-size (i.e. 4, 8, 16 or 32 pixels)
+     * stride is aligned by 16 pixels
+     * block is 16-byte aligned
+     * eob indicates the position (+1) of the last non-zero coefficient,
+     * in scan-order. This can be used to write faster versions, e.g. a
+     * dc-only 4x4/8x8/16x16/32x32, or a 4x4-only (eob<10) 8x8/16x16/32x32,
+     * etc.
+     */
+    // FIXME also write idct_add_block() versions for whole (inter) pred
+    // blocks, so we can do 2 4x4s at once
+    void (*itxfm_add[N_TXFM_SIZES + 1][N_TXFM_TYPES])(uint8_t *dst,
+                                                      ptrdiff_t stride,
+                                                      int16_t *block, int eob);
+
+    /*
+     * dimension 1: width of filter (0=4, 1=8, 2=16)
+     * dimension 2: 0=col-edge filter (h), 1=row-edge filter (v)
+     *
+     * dst/stride are aligned by 8
+     */
+    void (*loop_filter_8[3][2])(uint8_t *dst, ptrdiff_t stride,
+                                int mb_lim, int lim, int hev_thr);
+
+    /*
+     * dimension 1: 0=col-edge filter (h), 1=row-edge filter (v)
+     *
+     * The width of filter is assumed to be 16; dst/stride are aligned by 16
+     */
+    void (*loop_filter_16[2])(uint8_t *dst, ptrdiff_t stride,
+                              int mb_lim, int lim, int hev_thr);
+
+    /*
+     * dimension 1/2: width of filter (0=4, 1=8) for each filter half
+     * dimension 3: 0=col-edge filter (h), 1=row-edge filter (v)
+     *
+     * dst/stride are aligned by operation size
+     * this basically calls loop_filter[d1][d3][0](), followed by
+     * loop_filter[d2][d3][0]() on the next 8 pixels
+     * mb_lim/lim/hev_thr contain two values in the lowest two bytes of the
+     * integer.
+     */
+    // FIXME perhaps a mix4 that operates on 32px (for AVX2)
+    void (*loop_filter_mix2[2][2][2])(uint8_t *dst, ptrdiff_t stride,
+                                      int mb_lim, int lim, int hev_thr);
+
+    /*
+     * dimension 1: hsize (0: 64, 1: 32, 2: 16, 3: 8, 4: 4)
+     * dimension 2: filter type (0: smooth, 1: regular, 2: sharp, 3: bilin)
+     * dimension 3: averaging type (0: put, 1: avg)
+     * dimension 4: x subpel interpolation (0: none, 1: 8tap/bilin)
+     * dimension 5: y subpel interpolation (0: none, 1: 8tap/bilin)
+     *
+     * dst/stride are aligned by hsize
+     */
+    vp9_mc_func mc[5][4][2][2][2];
+
+    /*
+     * for scalable MC, first 3 dimensions identical to above, the other two
+     * don't exist since it changes per stepsize.
+     */
+    vp9_scaled_mc_func smc[5][4][2];
+} VP9DSPContext;
+
+extern const int16_t ff_vp9_subpel_filters[3][16][8];
+
+void ff_vp9dsp_init(VP9DSPContext *dsp, int bpp, int bitexact);
+
+void ff_vp9dsp_init_8(VP9DSPContext *dsp);
+void ff_vp9dsp_init_10(VP9DSPContext *dsp);
+void ff_vp9dsp_init_12(VP9DSPContext *dsp);
+
+void ff_vp9dsp_init_aarch64(VP9DSPContext *dsp, int bpp);
+void ff_vp9dsp_init_arm(VP9DSPContext *dsp, int bpp);
+void ff_vp9dsp_init_x86(VP9DSPContext *dsp, int bpp, int bitexact);
+void ff_vp9dsp_init_mips(VP9DSPContext *dsp, int bpp);
+
+#endif /* AVCODEC_VP9DSP_H */
diff --git a/libavcodec/vp9dsp_template.c b/libavcodec/vp9dsp_template.c
index 01b08cd..bb54561 100644
--- a/libavcodec/vp9dsp_template.c
+++ b/libavcodec/vp9dsp_template.c
@@ -23,7 +23,7 @@
 
 #include "libavutil/common.h"
 #include "bit_depth_template.c"
-#include "vp9.h"
+#include "vp9dsp.h"
 
 #if BIT_DEPTH != 12
 
diff --git a/libavcodec/vp9mvs.c b/libavcodec/vp9mvs.c
index a66972b..e323bac 100644
--- a/libavcodec/vp9mvs.c
+++ b/libavcodec/vp9mvs.c
@@ -25,6 +25,7 @@
 #include "vp56.h"
 #include "vp9.h"
 #include "vp9data.h"
+#include "vp9dec.h"
 
 static av_always_inline void clamp_mv(VP56mv *dst, const VP56mv *src,
                                       VP9Context *s)
diff --git a/libavcodec/vp9prob.c b/libavcodec/vp9prob.c
index b45d20d..cde909c 100644
--- a/libavcodec/vp9prob.c
+++ b/libavcodec/vp9prob.c
@@ -24,6 +24,7 @@
 #include "vp56.h"
 #include "vp9.h"
 #include "vp9data.h"
+#include "vp9dec.h"
 
 static av_always_inline void adapt_prob(uint8_t *p, unsigned ct0, unsigned ct1,
                                         int max_count, int update_factor)
diff --git a/libavcodec/x86/vp9dsp_init.c b/libavcodec/x86/vp9dsp_init.c
index ae54377..66363d4 100644
--- a/libavcodec/x86/vp9dsp_init.c
+++ b/libavcodec/x86/vp9dsp_init.c
@@ -24,7 +24,7 @@
 #include "libavutil/cpu.h"
 #include "libavutil/mem.h"
 #include "libavutil/x86/cpu.h"
-#include "libavcodec/vp9.h"
+#include "libavcodec/vp9dsp.h"
 #include "libavcodec/x86/vp9dsp_init.h"
 
 #if HAVE_YASM
diff --git a/libavcodec/x86/vp9dsp_init.h b/libavcodec/x86/vp9dsp_init.h
index 016dc7f..e410cab 100644
--- a/libavcodec/x86/vp9dsp_init.h
+++ b/libavcodec/x86/vp9dsp_init.h
@@ -23,7 +23,7 @@
 #ifndef AVCODEC_X86_VP9DSP_INIT_H
 #define AVCODEC_X86_VP9DSP_INIT_H
 
-#include "libavcodec/vp9.h"
+#include "libavcodec/vp9dsp.h"
 
 // hack to force-expand BPC
 #define cat(a, bpp, b) a##bpp##b
diff --git a/libavcodec/x86/vp9dsp_init_16bpp.c b/libavcodec/x86/vp9dsp_init_16bpp.c
index 17aad50..4576ff1 100644
--- a/libavcodec/x86/vp9dsp_init_16bpp.c
+++ b/libavcodec/x86/vp9dsp_init_16bpp.c
@@ -24,7 +24,7 @@
 #include "libavutil/cpu.h"
 #include "libavutil/mem.h"
 #include "libavutil/x86/cpu.h"
-#include "libavcodec/vp9.h"
+#include "libavcodec/vp9dsp.h"
 #include "libavcodec/x86/vp9dsp_init.h"
 
 #if HAVE_YASM
diff --git a/libavcodec/x86/vp9dsp_init_16bpp_template.c b/libavcodec/x86/vp9dsp_init_16bpp_template.c
index 6f37e4b..4840b28 100644
--- a/libavcodec/x86/vp9dsp_init_16bpp_template.c
+++ b/libavcodec/x86/vp9dsp_init_16bpp_template.c
@@ -24,7 +24,7 @@
 #include "libavutil/cpu.h"
 #include "libavutil/mem.h"
 #include "libavutil/x86/cpu.h"
-#include "libavcodec/vp9.h"
+#include "libavcodec/vp9dsp.h"
 #include "libavcodec/x86/vp9dsp_init.h"
 
 #if HAVE_YASM