1 files changed, 126 insertions, 0 deletions
diff --git a/video/decode/cuda.c b/video/decode/cuda.c
new file mode 100644
index 0000000000..f41aed2e7c
--- /dev/null
+++ b/video/decode/cuda.c
@@ -0,0 +1,126 @@
+/*
+ * This file is part of mpv.
+ *
+ * Copyright (c) 2016 Philip Langdale <philipl@overt.org>
+ *
+ * mpv 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.
+ *
+ * mpv 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 mpv.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <libavutil/hwcontext.h>
+#include <libavutil/hwcontext_cuda.h>
+
+#include "common/av_common.h"
+#include "video/decode/lavc.h"
+
+typedef struct CUVIDContext {
+    CUcontext cuda_ctx;
+} CUVIDContext;
+
+static void cuvid_ctx_free(AVHWDeviceContext *ctx)
+{
+    AVCUDADeviceContext *hwctx = ctx->hwctx;
+    cuCtxDestroy(hwctx->cuda_ctx);
+}
+
+static int probe(struct lavc_ctx *ctx, struct vd_lavc_hwdec *hwdec,
+                 const char *codec)
+{
+    if (!hwdec_devices_load(ctx->hwdec_devs, HWDEC_CUDA))
+        return HWDEC_ERR_NO_CTX;
+    return 0;
+}
+
+static int init(struct lavc_ctx *ctx)
+{
+    struct CUVIDContext *p = talloc_ptrtype(NULL, p);
+
+    *p = (struct CUVIDContext) {
+        .cuda_ctx = hwdec_devices_get(ctx->hwdec_devs, HWDEC_CUDA)->ctx,
+    };
+    ctx->hwdec_priv = p;
+    return 0;
+}
+
+static int init_decoder(struct lavc_ctx *ctx, int w, int h)
+{
+    AVCodecContext *avctx = ctx->avctx;
+    AVCUDADeviceContext *device_hwctx;
+    AVHWDeviceContext *device_ctx;
+    CUVIDContext *priv = ctx->hwdec_priv;
+    int ret = 0;
+
+    if (avctx->hw_frames_ctx) {
+        MP_ERR(ctx, "hw_frames_ctx already initialised!\n");
+        return -1;
+    }
+
+    AVBufferRef *hw_device_ctx = av_hwdevice_ctx_alloc(AV_HWDEVICE_TYPE_CUDA);
+    if (!hw_device_ctx) {
+        MP_WARN(ctx, "av_hwdevice_ctx_alloc(AV_HWDEVICE_TYPE_CUDA) failed\n");
+        goto error;
+    }
+
+    device_ctx = (AVHWDeviceContext*)hw_device_ctx->data;
+    device_ctx->free = cuvid_ctx_free;
+
+    device_hwctx = device_ctx->hwctx;
+    device_hwctx->cuda_ctx = priv->cuda_ctx;
+
+    ret = av_hwdevice_ctx_init(hw_device_ctx);
+    if (ret < 0) {
+        MP_ERR(ctx, "av_hwdevice_ctx_init failed\n");
+        goto error;
+    }
+
+    avctx->hw_frames_ctx = av_hwframe_ctx_alloc(hw_device_ctx);
+    if (!avctx->hw_frames_ctx) {
+        MP_ERR(ctx, "av_hwframe_ctx_alloc failed\n");
+        goto error;
+    }
+
+    return 0;
+
+ error:
+    av_buffer_unref(&avctx->hw_frames_ctx);
+    av_buffer_unref(&hw_device_ctx);
+    return -1;
+}
+
+static void uninit(struct lavc_ctx *ctx)
+{
+    struct CUVIDContext *p = ctx->hwdec_priv;
+    if (!p)
+        return;
+
+    talloc_free(p);
+    ctx->hwdec_priv = NULL;
+}
+
+static struct mp_image *process_image(struct lavc_ctx *ctx, struct mp_image *img)
+{
+    if (img->imgfmt == IMGFMT_CUDA)
+        img->params.hw_subfmt = IMGFMT_NV12;
+    return img;
+}
+
+const struct vd_lavc_hwdec mp_vd_lavc_cuda = {
+    .type = HWDEC_CUDA,
+    .image_format = IMGFMT_CUDA,
+    .lavc_suffix = "_cuvid",
+    .probe = probe,
+    .init = init,
+    .uninit = uninit,
+    .init_decoder = init_decoder,
+    .process_image = process_image,
+};