FFmpeg
hwcontext_dxva2.h
Go to the documentation of this file.
1 /*
2  * This file is part of FFmpeg.
3  *
4  * FFmpeg 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  * FFmpeg 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 FFmpeg; if not, write to the Free Software
16  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17  */
18 
19 
20 #ifndef AVUTIL_HWCONTEXT_DXVA2_H
21 #define AVUTIL_HWCONTEXT_DXVA2_H
22 
23 /**
24  * @file
25  * An API-specific header for AV_HWDEVICE_TYPE_DXVA2.
26  *
27  * Only fixed-size pools are supported.
28  *
29  * For user-allocated pools, AVHWFramesContext.pool must return AVBufferRefs
30  * with the data pointer set to a pointer to IDirect3DSurface9.
31  */
32 
33 #include <d3d9.h>
34 #include <dxva2api.h>
35 
36 /**
37  * This struct is allocated as AVHWDeviceContext.hwctx
38  */
39 typedef struct AVDXVA2DeviceContext {
40  IDirect3DDeviceManager9 *devmgr;
42 
43 /**
44  * This struct is allocated as AVHWFramesContext.hwctx
45  */
46 typedef struct AVDXVA2FramesContext {
47  /**
48  * The surface type (e.g. DXVA2_VideoProcessorRenderTarget or
49  * DXVA2_VideoDecoderRenderTarget). Must be set by the caller.
50  */
52 
53  /**
54  * The surface pool. When an external pool is not provided by the caller,
55  * this will be managed (allocated and filled on init, freed on uninit) by
56  * libavutil.
57  */
58  IDirect3DSurface9 **surfaces;
60 
61  /**
62  * Certain drivers require the decoder to be destroyed before the surfaces.
63  * To allow internally managed pools to work properly in such cases, this
64  * field is provided.
65  *
66  * If it is non-NULL, libavutil will call IDirectXVideoDecoder_Release() on
67  * it just before the internal surface pool is freed.
68  *
69  * This is for convenience only. Some code uses other methods to manage the
70  * decoder reference.
71  */
72  IDirectXVideoDecoder *decoder_to_release;
74 
75 #endif /* AVUTIL_HWCONTEXT_DXVA2_H */
This struct is allocated as AVHWFramesContext.hwctx.
DWORD surface_type
The surface type (e.g.
IDirectXVideoDecoder * decoder_to_release
Certain drivers require the decoder to be destroyed before the surfaces.
IDirect3DDeviceManager9 * devmgr
uint32_t DWORD
IDirect3DSurface9 ** surfaces
The surface pool.
This struct is allocated as AVHWDeviceContext.hwctx.