1 files changed, 132 insertions, 0 deletions
diff --git a/libavcodec/dirac_dwt.h b/libavcodec/dirac_dwt.h
new file mode 100644
index 0000000000..994dc21d70
--- /dev/null
+++ b/libavcodec/dirac_dwt.h
@@ -0,0 +1,132 @@
+/*
+ * Copyright (C) 2004-2010 Michael Niedermayer <michaelni@gmx.at>
+ *
+ * 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_DIRAC_DWT_H
+#define AVCODEC_DIRAC_DWT_H
+
+#include <stdint.h>
+
+typedef int DWTELEM;
+typedef short IDWTELEM;
+
+#define MAX_DWT_SUPPORT 8
+#define MAX_DECOMPOSITIONS 8
+
+typedef struct DWTCompose {
+    uint8_t *b[MAX_DWT_SUPPORT];
+    int y;
+} DWTCompose;
+
+typedef struct DWTPlane {
+    int width;
+    int height;
+    int stride;
+    uint8_t *buf;
+    uint8_t *buf_base;
+    uint8_t *tmp;
+} DWTPlane;
+
+struct DWTContext;
+
+// Possible prototypes for vertical_compose functions
+typedef void (*vertical_compose_2tap)(uint8_t *b0, uint8_t *b1, int width);
+typedef void (*vertical_compose_3tap)(uint8_t *b0, uint8_t *b1, uint8_t *b2, int width);
+typedef void (*vertical_compose_5tap)(uint8_t *b0, uint8_t *b1, uint8_t *b2, uint8_t *b3, uint8_t *b4, int width);
+typedef void (*vertical_compose_9tap)(uint8_t *dst, uint8_t *b[8], int width);
+
+typedef struct DWTContext {
+    uint8_t *buffer;
+    uint8_t *temp;
+    int width;
+    int height;
+    int stride;
+    int decomposition_count;
+    int support;
+
+    void (*spatial_compose)(struct DWTContext *cs, int level, int width, int height, int stride);
+    void (*vertical_compose_l0)(void);
+    void (*vertical_compose_h0)(void);
+    void (*vertical_compose_l1)(void);
+    void (*vertical_compose_h1)(void);
+    void (*vertical_compose)(void);     ///< one set of lowpass and highpass combined
+    void (*horizontal_compose)(uint8_t *b, uint8_t *tmp, int width);
+
+    DWTCompose cs[MAX_DECOMPOSITIONS];
+} DWTContext;
+
+enum dwt_type {
+    DWT_SNOW_DAUB9_7,
+    DWT_SNOW_LEGALL5_3,
+    DWT_DIRAC_DD9_7,
+    DWT_DIRAC_LEGALL5_3,
+    DWT_DIRAC_DD13_7,
+    DWT_DIRAC_HAAR0,
+    DWT_DIRAC_HAAR1,
+    DWT_DIRAC_FIDELITY,
+    DWT_DIRAC_DAUB9_7,
+    DWT_NUM_TYPES
+};
+
+// -1 if an error occurred, e.g. the dwt_type isn't recognized
+int ff_spatial_idwt_init(DWTContext *d, DWTPlane *p, enum dwt_type type,
+                         int decomposition_count, int bit_depth);
+void ff_spatial_idwt_init_x86(DWTContext *d, enum dwt_type type);
+
+void ff_spatial_idwt_slice2(DWTContext *d, int y);
+
+// shared stuff for simd optimizations
+#define COMPOSE_53iL0(b0, b1, b2)\
+    (b1 - (unsigned)((int)(b0 + (unsigned)(b2) + 2) >> 2))
+
+#define COMPOSE_DIRAC53iH0(b0, b1, b2)\
+    (b1 + (unsigned)((int)(b0 + (unsigned)(b2) + 1) >> 1))
+
+#define COMPOSE_DD97iH0(b0, b1, b2, b3, b4)\
+    (int)(((unsigned)(b2) + ((int)(9U*b1 + 9U*b3 - b4 - b0 +  8) >> 4)))
+
+#define COMPOSE_DD137iL0(b0, b1, b2, b3, b4)\
+    (int)(((unsigned)(b2) - ((int)(9U*b1 + 9U*b3 - b4 - b0 + 16) >> 5)))
+
+#define COMPOSE_HAARiL0(b0, b1)\
+    ((int)(b0 - (unsigned)((int)(b1 + 1U) >> 1)))
+
+#define COMPOSE_HAARiH0(b0, b1)\
+    ((int)(b0 + (unsigned)(b1)))
+
+#define COMPOSE_FIDELITYiL0(b0, b1, b2, b3, b4, b5, b6, b7, b8)\
+    ((unsigned)b4 - ((int)(-8*(b0+(unsigned)b8) + 21*(b1+(unsigned)b7) - 46*(b2+(unsigned)b6) + 161*(b3+(unsigned)b5) + 128) >> 8))
+
+#define COMPOSE_FIDELITYiH0(b0, b1, b2, b3, b4, b5, b6, b7, b8)\
+    ((unsigned)b4 + ((int)(-2*(b0+(unsigned)b8) + 10*(b1+(unsigned)b7) - 25*(b2+(unsigned)b6) +  81*(b3+(unsigned)b5) + 128) >> 8))
+
+#define COMPOSE_DAUB97iL1(b0, b1, b2)\
+    ((unsigned)(b1) - ((int)(1817*(b0 + (unsigned)b2) + 2048) >> 12))
+
+#define COMPOSE_DAUB97iH1(b0, b1, b2)\
+    ((unsigned)(b1) - ((int)( 113*(b0 + (unsigned)b2) + 64) >> 7))
+
+#define COMPOSE_DAUB97iL0(b0, b1, b2)\
+    ((unsigned)(b1) + ((int)( 217*(b0 + (unsigned)b2) + 2048) >> 12))
+
+#define COMPOSE_DAUB97iH0(b0, b1, b2)\
+    ((unsigned)(b1) + ((int)(6497*(b0 + (unsigned)b2) + 2048) >> 12))
+
+
+#endif /* AVCODEC_DWT_H */