1 /*
2  *  Copyright (c) 2010 The WebM project authors. All Rights Reserved.
3  *
4  *  Use of this source code is governed by a BSD-style license
5  *  that can be found in the LICENSE file in the root of the source
6  *  tree. An additional intellectual property rights grant can be found
7  *  in the file PATENTS.  All contributing project authors may
8  *  be found in the AUTHORS file in the root of the source tree.
9  */
10 
11 #ifndef VPX_SCALE_YV12CONFIG_H_
12 #define VPX_SCALE_YV12CONFIG_H_
13 
14 #ifdef __cplusplus
15 extern "C" {
16 #endif
17 
18 #include "vpx/vpx_frame_buffer.h"
19 #include "vpx/vpx_integer.h"
20 
21 #define VP8BORDERINPIXELS           32
22 #define VP9INNERBORDERINPIXELS      96
23 #define VP9_INTERP_EXTEND           4
24 #define VP9_ENC_BORDER_IN_PIXELS    160
25 #define VP9_DEC_BORDER_IN_PIXELS    32
26 
27 typedef struct yv12_buffer_config {
28   int   y_width;
29   int   y_height;
30   int   y_crop_width;
31   int   y_crop_height;
32   int   y_stride;
33 
34   int   uv_width;
35   int   uv_height;
36   int   uv_crop_width;
37   int   uv_crop_height;
38   int   uv_stride;
39 
40   int   alpha_width;
41   int   alpha_height;
42   int   alpha_stride;
43 
44   uint8_t *y_buffer;
45   uint8_t *u_buffer;
46   uint8_t *v_buffer;
47   uint8_t *alpha_buffer;
48 
49   uint8_t *buffer_alloc;
50   int buffer_alloc_sz;
51   int border;
52   int frame_size;
53 
54   int corrupted;
55   int flags;
56 } YV12_BUFFER_CONFIG;
57 
58 int vp8_yv12_alloc_frame_buffer(YV12_BUFFER_CONFIG *ybf,
59                                 int width, int height, int border);
60 int vp8_yv12_realloc_frame_buffer(YV12_BUFFER_CONFIG *ybf,
61                                   int width, int height, int border);
62 int vp8_yv12_de_alloc_frame_buffer(YV12_BUFFER_CONFIG *ybf);
63 
64 int vp9_alloc_frame_buffer(YV12_BUFFER_CONFIG *ybf,
65                            int width, int height, int ss_x, int ss_y,
66                            int border);
67 
68 // Updates the yv12 buffer config with the frame buffer. If cb is not
69 // NULL, then libvpx is using the frame buffer callbacks to handle memory.
70 // If cb is not NULL, libvpx will call cb with minimum size in bytes needed
71 // to decode the current frame. If cb is NULL, libvpx will allocate memory
72 // internally to decode the current frame. Returns 0 on success. Returns < 0
73 // on failure.
74 int vp9_realloc_frame_buffer(YV12_BUFFER_CONFIG *ybf,
75                              int width, int height, int ss_x, int ss_y,
76                              int border,
77                              vpx_codec_frame_buffer_t *fb,
78                              vpx_get_frame_buffer_cb_fn_t cb,
79                              void *cb_priv);
80 int vp9_free_frame_buffer(YV12_BUFFER_CONFIG *ybf);
81 
82 #ifdef __cplusplus
83 }
84 #endif
85 
86 #endif  // VPX_SCALE_YV12CONFIG_H_
87