#ifndef AVCODEC_HWACCEL_H
#define AVCODEC_HWACCEL_H
+#include "avcodec.h"
+#include "hwaccels.h"
+
+
#define HWACCEL_CAP_ASYNC_SAFE (1 << 0)
+
+typedef struct AVCodecHWConfigInternal {
+ /**
+ * This is the structure which will be returned to the user by
+ * avcodec_get_hw_config().
+ */
+ AVCodecHWConfig public;
+ /**
+ * If this configuration uses a hwaccel, a pointer to it.
+ * If not, NULL.
+ */
+ const AVHWAccel *hwaccel;
+} AVCodecHWConfigInternal;
+
+
+// These macros are used to simplify AVCodecHWConfigInternal definitions.
+
+#define HW_CONFIG_HWACCEL(format, device, name) \
+ &(const AVCodecHWConfigInternal) { \
+ .public = { \
+ .pix_fmt = AV_PIX_FMT_ ## format, \
+ .methods = AV_CODEC_HW_CONFIG_METHOD_HW_DEVICE_CTX | \
+ AV_CODEC_HW_CONFIG_METHOD_HW_FRAMES_CTX, \
+ .device_type = AV_HWDEVICE_TYPE_ ## device, \
+ }, \
+ .hwaccel = &name, \
+ }
+
+#define HW_CONFIG_INTERNAL(format) \
+ &(const AVCodecHWConfigInternal) { \
+ .public = { \
+ .pix_fmt = AV_PIX_FMT_ ## format, \
+ .methods = AV_CODEC_HW_CONFIG_METHOD_INTERNAL, \
+ .device_type = AV_HWDEVICE_TYPE_NONE, \
+ }, \
+ .hwaccel = NULL, \
+ }
+
+#define HW_CONFIG_AD_HOC_HWACCEL(format, name) \
+ &(const AVCodecHWConfigInternal) { \
+ .public = { \
+ .pix_fmt = AV_PIX_FMT_ ## format, \
+ .methods = AV_CODEC_HW_CONFIG_METHOD_AD_HOC, \
+ .device_type = AV_HWDEVICE_TYPE_NONE, \
+ }, \
+ .hwaccel = &name, \
+ }
+
+#define HWACCEL_DXVA2(codec) \
+ HW_CONFIG_HWACCEL(DXVA2_VLD, DXVA2, ff_ ## codec ## _dxva2_hwaccel)
+#define HWACCEL_D3D11VA2(codec) \
+ HW_CONFIG_HWACCEL(D3D11, D3D11VA, ff_ ## codec ## _d3d11va2_hwaccel)
+#define HWACCEL_NVDEC(codec) \
+ HW_CONFIG_HWACCEL(CUDA, CUDA, ff_ ## codec ## _nvdec_hwaccel)
+#define HWACCEL_VAAPI(codec) \
+ HW_CONFIG_HWACCEL(VAAPI, VAAPI, ff_ ## codec ## _vaapi_hwaccel)
+#define HWACCEL_VDPAU(codec) \
+ HW_CONFIG_HWACCEL(VDPAU, VDPAU, ff_ ## codec ## _vdpau_hwaccel)
+#define HWACCEL_VIDEOTOOLBOX(codec) \
+ HW_CONFIG_HWACCEL(VIDEOTOOLBOX, VIDEOTOOLBOX, ff_ ## codec ## _videotoolbox_hwaccel)
+
+#define HWACCEL_D3D11VA(codec) \
+ HW_CONFIG_AD_HOC_HWACCEL(D3D11VA_VLD, ff_ ## codec ## _d3d11va_hwaccel)
+#define HWACCEL_XVMC(codec) \
+ HW_CONFIG_AD_HOC_HWACCEL(XVMC, ff_ ## codec ## _xvmc_hwaccel)
+
#endif /* AVCODEC_HWACCEL_H */