1 files changed, 104 insertions, 0 deletions
diff --git a/video/decode/hw_cuda.c b/video/decode/hw_cuda.c
new file mode 100644
index 0000000000..92ba0772c4
--- /dev/null
+++ b/video/decode/hw_cuda.c
@@ -0,0 +1,104 @@
+/*
+ * 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/>.
+ */
+
+// This define and typedef prevent hwcontext_cuda.h trying to include cuda.h
+#define CUDA_VERSION 7050
+typedef void * CUcontext;
+
+#include <libavutil/hwcontext.h>
+#include <libavutil/hwcontext_cuda.h>
+
+#include "common/av_common.h"
+#include "video/fmt-conversion.h"
+#include "video/decode/lavc.h"
+
+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)
+{
+    ctx->hwdec_priv = hwdec_devices_get(ctx->hwdec_devs, HWDEC_CUDA);
+    return 0;
+}
+
+static int init_decoder(struct lavc_ctx *ctx, int w, int h)
+{
+    AVCodecContext *avctx = ctx->avctx;
+    struct mp_hwdec_ctx *hwctx = ctx->hwdec_priv;
+
+    if (avctx->hw_frames_ctx) {
+        MP_ERR(ctx, "hw_frames_ctx already initialised!\n");
+        return -1;
+    }
+
+    avctx->hw_frames_ctx = av_hwframe_ctx_alloc(hwctx->av_device_ref);
+    if (!avctx->hw_frames_ctx) {
+        MP_ERR(ctx, "av_hwframe_ctx_alloc failed\n");
+        goto error;
+    }
+
+    AVHWFramesContext *hwframe_ctx = (void* )avctx->hw_frames_ctx->data;
+    hwframe_ctx->format = AV_PIX_FMT_CUDA;
+
+    // This is proper use of the hw_frames_ctx API, but it does not work
+    // (appaears to work but fails e.g. with 10 bit). The cuvid wrapper
+    // does non-standard things, and it's a meesy situation.
+    /*
+    hwframe_ctx->width = w;
+    hwframe_ctx->height = h;
+    hwframe_ctx->sw_format = avctx->sw_pix_fmt;
+
+    if (av_hwframe_ctx_init(avctx->hw_frames_ctx) < 0)
+        goto error;
+    */
+
+    return 0;
+
+ error:
+    av_buffer_unref(&avctx->hw_frames_ctx);
+    return -1;
+}
+
+static void uninit(struct lavc_ctx *ctx)
+{
+    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 = pixfmt2imgfmt(ctx->avctx->sw_pix_fmt);
+    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,
+};