1 files changed, 84 insertions, 0 deletions
diff --git a/libavcodec/hwconfig.h b/libavcodec/hwconfig.h
new file mode 100644
index 0000000000..4199ffdd50
--- /dev/null
+++ b/libavcodec/hwconfig.h
@@ -0,0 +1,84 @@
+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVCODEC_HWCONFIG_H
+#define AVCODEC_HWCONFIG_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(device, frames, ad_hoc, format, device_type_, name) \
+    &(const AVCodecHWConfigInternal) { \
+        .public          = { \
+            .pix_fmt     = AV_PIX_FMT_ ## format, \
+            .methods     = (device ? AV_CODEC_HW_CONFIG_METHOD_HW_DEVICE_CTX : 0) | \
+                           (frames ? AV_CODEC_HW_CONFIG_METHOD_HW_FRAMES_CTX : 0) | \
+                           (ad_hoc ? AV_CODEC_HW_CONFIG_METHOD_AD_HOC        : 0),  \
+            .device_type = AV_HWDEVICE_TYPE_ ## device_type_, \
+        }, \
+        .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 HWACCEL_DXVA2(codec) \
+    HW_CONFIG_HWACCEL(1, 1, 1, DXVA2_VLD,    DXVA2,        ff_ ## codec ## _dxva2_hwaccel)
+#define HWACCEL_D3D11VA2(codec) \
+    HW_CONFIG_HWACCEL(1, 1, 0, D3D11,        D3D11VA,      ff_ ## codec ## _d3d11va2_hwaccel)
+#define HWACCEL_NVDEC(codec) \
+    HW_CONFIG_HWACCEL(1, 1, 0, CUDA,         CUDA,         ff_ ## codec ## _nvdec_hwaccel)
+#define HWACCEL_VAAPI(codec) \
+    HW_CONFIG_HWACCEL(1, 1, 1, VAAPI,        VAAPI,        ff_ ## codec ## _vaapi_hwaccel)
+#define HWACCEL_VDPAU(codec) \
+    HW_CONFIG_HWACCEL(1, 1, 1, VDPAU,        VDPAU,        ff_ ## codec ## _vdpau_hwaccel)
+#define HWACCEL_VIDEOTOOLBOX(codec) \
+    HW_CONFIG_HWACCEL(1, 1, 1, VIDEOTOOLBOX, VIDEOTOOLBOX, ff_ ## codec ## _videotoolbox_hwaccel)
+#define HWACCEL_D3D11VA(codec) \
+    HW_CONFIG_HWACCEL(0, 0, 1, D3D11VA_VLD,  NONE,         ff_ ## codec ## _d3d11va_hwaccel)
+#define HWACCEL_XVMC(codec) \
+    HW_CONFIG_HWACCEL(0, 0, 1, XVMC,         NONE,         ff_ ## codec ## _xvmc_hwaccel)
+
+#endif /* AVCODEC_HWCONFIG_H */