vl_idct.h revision 59774e5c7a2756c5c430fc74bc80ea75d54f594d 
1/**************************************************************************
2 *
3 * Copyright 2010 Christian König
4 * All Rights Reserved.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the
8 * "Software"), to deal in the Software without restriction, including
9 * without limitation the rights to use, copy, modify, merge, publish,
10 * distribute, sub license, and/or sell copies of the Software, and to
11 * permit persons to whom the Software is furnished to do so, subject to
12 * the following conditions:
13 *
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
16 * of the Software.
17 *
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
21 * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
22 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
23 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
24 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
25 *
26 **************************************************************************/
27
28#ifndef vl_idct_h
29#define vl_idct_h
30
31#include <pipe/p_state.h>
32#include "vl_vertex_buffers.h"
33#include "vl_ycbcr_buffer.h"
34
35/* shader based inverse distinct cosinus transformation
36 * expect usage of vl_vertex_buffers as a todo list
37 */
38struct vl_idct
39{
40   struct pipe_context *pipe;
41
42   unsigned buffer_width;
43   unsigned buffer_height;
44   unsigned blocks_x, blocks_y;
45
46   void *rs_state;
47
48   void *samplers[2];
49
50   void *matrix_vs, *transpose_vs;
51   void *matrix_fs, *transpose_fs;
52
53   struct pipe_sampler_view *matrix;
54};
55
56/* a set of buffers to work with */
57struct vl_idct_buffer
58{
59   struct pipe_viewport_state viewport[2];
60   struct pipe_framebuffer_state fb_state[2];
61
62   union
63   {
64      struct pipe_sampler_view *all[4];
65      struct pipe_sampler_view *stage[2][2];
66      struct {
67         struct pipe_sampler_view *matrix, *source;
68         struct pipe_sampler_view *transpose, *intermediate;
69      } individual;
70   } sampler_views;
71
72   struct pipe_transfer *tex_transfer;
73   short *texels;
74};
75
76/* upload the idct matrix, which can be shared by all idct instances of a pipe */
77struct pipe_sampler_view *vl_idct_upload_matrix(struct pipe_context *pipe);
78
79/* init an idct instance */
80bool vl_idct_init(struct vl_idct *idct, struct pipe_context *pipe,
81                  unsigned buffer_width, unsigned buffer_height,
82                  unsigned blocks_x, unsigned blocks_y,
83                  struct pipe_sampler_view *matrix);
84
85/* destroy an idct instance */
86void vl_idct_cleanup(struct vl_idct *idct);
87
88/* init a buffer assosiated with agiven idct instance */
89bool vl_idct_init_buffer(struct vl_idct *idct, struct vl_idct_buffer *buffer,
90                         struct pipe_sampler_view *source, struct pipe_surface *destination);
91
92/* cleanup a buffer of an idct instance */
93void vl_idct_cleanup_buffer(struct vl_idct *idct, struct vl_idct_buffer *buffer);
94
95/* map a buffer for use with vl_idct_add_block */
96void vl_idct_map_buffers(struct vl_idct *idct, struct vl_idct_buffer *buffer);
97
98/* add an block of to be tranformed data a the given x and y coordinate */
99void vl_idct_add_block(struct vl_idct_buffer *buffer, unsigned x, unsigned y, short *block);
100
101/* unmaps the buffers before flushing */
102void vl_idct_unmap_buffers(struct vl_idct *idct, struct vl_idct_buffer *buffer);
103
104/* flush the buffer and start rendering, vertex buffers needs to be setup before calling this */
105void vl_idct_flush(struct vl_idct *idct, struct vl_idct_buffer *buffer, unsigned num_verts);
106
107#endif
108