lavu: add a way to query hwcontext frame constraints
[libav.git] / libavutil / hwcontext_internal.h
1 /*
2 * This file is part of Libav.
3 *
4 * Libav is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2.1 of the License, or (at your option) any later version.
8 *
9 * Libav is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
13 *
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with Libav; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17 */
18
19 #ifndef AVUTIL_HWCONTEXT_INTERNAL_H
20 #define AVUTIL_HWCONTEXT_INTERNAL_H
21
22 #include <stddef.h>
23
24 #include "buffer.h"
25 #include "hwcontext.h"
26 #include "frame.h"
27 #include "pixfmt.h"
28
29 typedef struct HWContextType {
30 enum AVHWDeviceType type;
31 const char *name;
32
33 /**
34 * An array of pixel formats supported by the AVHWFramesContext instances
35 * Terminated by AV_PIX_FMT_NONE.
36 */
37 const enum AVPixelFormat *pix_fmts;
38
39 /**
40 * size of the public hardware-specific context,
41 * i.e. AVHWDeviceContext.hwctx
42 */
43 size_t device_hwctx_size;
44 /**
45 * size of the private data, i.e.
46 * AVHWDeviceInternal.priv
47 */
48 size_t device_priv_size;
49
50 /**
51 * Size of the hardware-specific device configuration.
52 * (Used to query hwframe constraints.)
53 */
54 size_t device_hwconfig_size;
55
56 /**
57 * size of the public frame pool hardware-specific context,
58 * i.e. AVHWFramesContext.hwctx
59 */
60 size_t frames_hwctx_size;
61 /**
62 * size of the private data, i.e.
63 * AVHWFramesInternal.priv
64 */
65 size_t frames_priv_size;
66
67 int (*device_init)(AVHWDeviceContext *ctx);
68 void (*device_uninit)(AVHWDeviceContext *ctx);
69
70 int (*frames_get_constraints)(AVHWDeviceContext *ctx,
71 const void *hwconfig,
72 AVHWFramesConstraints *constraints);
73
74 int (*frames_init)(AVHWFramesContext *ctx);
75 void (*frames_uninit)(AVHWFramesContext *ctx);
76
77 int (*frames_get_buffer)(AVHWFramesContext *ctx, AVFrame *frame);
78 int (*transfer_get_formats)(AVHWFramesContext *ctx,
79 enum AVHWFrameTransferDirection dir,
80 enum AVPixelFormat **formats);
81 int (*transfer_data_to)(AVHWFramesContext *ctx, AVFrame *dst,
82 const AVFrame *src);
83 int (*transfer_data_from)(AVHWFramesContext *ctx, AVFrame *dst,
84 const AVFrame *src);
85 } HWContextType;
86
87 struct AVHWDeviceInternal {
88 const HWContextType *hw_type;
89 void *priv;
90 };
91
92 struct AVHWFramesInternal {
93 const HWContextType *hw_type;
94 void *priv;
95
96 AVBufferPool *pool_internal;
97 };
98
99 extern const HWContextType ff_hwcontext_type_cuda;
100 extern const HWContextType ff_hwcontext_type_vdpau;
101
102 #endif /* AVUTIL_HWCONTEXT_INTERNAL_H */