lavc: split snow and dirac DWTs

There is only about 4 lines of common code, so it alot cleaner
when seperated.

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

1 files changed, 127 insertions, 0 deletions

diff --git a/libavcodec/snow_dwt.h b/libavcodec/snow_dwt.h
new file mode 100644
index 0000000000..0806b389e2
--- /dev/null
+++ b/libavcodec/snow_dwt.h
@@ -0,0 +1,127 @@
+/*
+ * 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_SNOW_DWT_H
+#define AVCODEC_SNOW_DWT_H
+
+#include <stdint.h>
+
+typedef int DWTELEM;
+typedef short IDWTELEM;
+
+#define MAX_DECOMPOSITIONS 8
+
+typedef struct DWTCompose {
+    IDWTELEM *b0;
+    IDWTELEM *b1;
+    IDWTELEM *b2;
+    IDWTELEM *b3;
+    int y;
+} DWTCompose;
+
+/** Used to minimize the amount of memory used in order to
+ *  optimize cache performance. **/
+typedef struct slice_buffer_s {
+    IDWTELEM **line;   ///< For use by idwt and predict_slices.
+    IDWTELEM **data_stack;   ///< Used for internal purposes.
+    int data_stack_top;
+    int line_count;
+    int line_width;
+    int data_count;
+    IDWTELEM *base_buffer;  ///< Buffer that this structure is caching.
+} slice_buffer;
+
+struct SnowDWTContext;
+
+typedef struct SnowDWTContext {
+    void (*vertical_compose97i)(IDWTELEM *b0, IDWTELEM *b1, IDWTELEM *b2,
+                                IDWTELEM *b3, IDWTELEM *b4, IDWTELEM *b5,
+                                int width);
+    void (*horizontal_compose97i)(IDWTELEM *b, IDWTELEM *temp, int width);
+    void (*inner_add_yblock)(const uint8_t *obmc, const int obmc_stride,
+                             uint8_t **block, int b_w, int b_h, int src_x,
+                             int src_y, int src_stride, slice_buffer *sb,
+                             int add, uint8_t *dst8);
+} SnowDWTContext;
+
+
+#define DWT_97 0
+#define DWT_53 1
+
+#define liftS lift
+#define W_AM 3
+#define W_AO 0
+#define W_AS 1
+
+#undef liftS
+#define W_BM 1
+#define W_BO 8
+#define W_BS 4
+
+#define W_CM 1
+#define W_CO 0
+#define W_CS 0
+
+#define W_DM 3
+#define W_DO 4
+#define W_DS 3
+
+#define slice_buffer_get_line(slice_buf, line_num)                          \
+    ((slice_buf)->line[line_num] ? (slice_buf)->line[line_num]              \
+                                 : ff_slice_buffer_load_line((slice_buf),   \
+                                                             (line_num)))
+
+int ff_slice_buffer_init(slice_buffer *buf, int line_count,
+                         int max_allocated_lines, int line_width,
+                         IDWTELEM *base_buffer);
+void ff_slice_buffer_release(slice_buffer *buf, int line);
+void ff_slice_buffer_flush(slice_buffer *buf);
+void ff_slice_buffer_destroy(slice_buffer *buf);
+IDWTELEM *ff_slice_buffer_load_line(slice_buffer *buf, int line);
+
+void ff_snow_vertical_compose97i(IDWTELEM *b0, IDWTELEM *b1, IDWTELEM *b2,
+                                 IDWTELEM *b3, IDWTELEM *b4, IDWTELEM *b5,
+                                 int width);
+void ff_snow_horizontal_compose97i(IDWTELEM *b, IDWTELEM *temp, int width);
+void ff_snow_inner_add_yblock(const uint8_t *obmc, const int obmc_stride,
+                              uint8_t **block, int b_w, int b_h, int src_x,
+                              int src_y, int src_stride, slice_buffer *sb,
+                              int add, uint8_t *dst8);
+
+int ff_w53_32_c(void *v, uint8_t *pix1, uint8_t *pix2, int line_size, int h);
+int ff_w97_32_c(void *v, uint8_t *pix1, uint8_t *pix2, int line_size, int h);
+
+void ff_spatial_dwt(int *buffer, int *temp, int width, int height, int stride,
+                    int type, int decomposition_count);
+
+void ff_spatial_idwt_buffered_init(DWTCompose *cs, slice_buffer *sb, int width,
+                                   int height, int stride_line, int type,
+                                   int decomposition_count);
+void ff_spatial_idwt_buffered_slice(SnowDWTContext *dsp, DWTCompose *cs,
+                                    slice_buffer *slice_buf, IDWTELEM *temp,
+                                    int width, int height, int stride_line,
+                                    int type, int decomposition_count, int y);
+void ff_spatial_idwt(IDWTELEM *buffer, IDWTELEM *temp, int width, int height,
+                     int stride, int type, int decomposition_count);
+
+void ff_dwt_init(SnowDWTContext *c);
+void ff_dwt_init_x86(SnowDWTContext *c);
+
+#endif /* AVCODEC_DWT_H */