1 files changed, 105 insertions, 0 deletions
diff --git a/libavcodec/nvdec_vp8.c b/libavcodec/nvdec_vp8.c
new file mode 100644
index 0000000000..9c4608d8cf
--- /dev/null
+++ b/libavcodec/nvdec_vp8.c
@@ -0,0 +1,105 @@
+/*
+ * VP8 HW decode acceleration through NVDEC
+ *
+ * Copyright (c) 2017 Philip Langdale
+ *
+ * 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
+ */
+
+#include "avcodec.h"
+#include "nvdec.h"
+#include "decode.h"
+#include "internal.h"
+#include "vp8.h"
+
+static unsigned char safe_get_ref_idx(VP8Frame *frame)
+{
+    return frame ? ff_nvdec_get_ref_idx(frame->tf.f) : 255;
+}
+
+static int nvdec_vp8_start_frame(AVCodecContext *avctx, const uint8_t *buffer, uint32_t size)
+{
+    VP8Context *h = avctx->priv_data;
+
+    NVDECContext      *ctx = avctx->internal->hwaccel_priv_data;
+    CUVIDPICPARAMS     *pp = &ctx->pic_params;
+    FrameDecodeData *fdd;
+    NVDECFrame *cf;
+    AVFrame *cur_frame = h->framep[VP56_FRAME_CURRENT]->tf.f;
+
+    int ret;
+
+    ret = ff_nvdec_start_frame(avctx, cur_frame);
+    if (ret < 0)
+        return ret;
+
+    fdd = (FrameDecodeData*)cur_frame->private_ref->data;
+    cf  = (NVDECFrame*)fdd->hwaccel_priv;
+
+    *pp = (CUVIDPICPARAMS) {
+        .PicWidthInMbs     = (cur_frame->width  + 15) / 16,
+        .FrameHeightInMbs  = (cur_frame->height + 15) / 16,
+        .CurrPicIdx        = cf->idx,
+
+        .CodecSpecific.vp8 = {
+            .width                       = cur_frame->width,
+            .height                      = cur_frame->height,
+
+            .first_partition_size        = h->header_partition_size,
+
+            .LastRefIdx                  = safe_get_ref_idx(h->framep[VP56_FRAME_PREVIOUS]),
+            .GoldenRefIdx                = safe_get_ref_idx(h->framep[VP56_FRAME_GOLDEN]),
+            .AltRefIdx                   = safe_get_ref_idx(h->framep[VP56_FRAME_GOLDEN2]),
+            /*
+             * Explicit braces for anonymous inners and unnamed fields
+             * to work around limitations in ancient versions of gcc.
+             */
+            { // union
+                { // struct
+                    !h->keyframe,             // frame_type
+                    h->profile,               // version
+                    !h->invisible,            // show_frame
+                    h->segmentation.enabled ? // update_mb_segmentation_data
+                        h->segmentation.update_feature_data : 0,
+                }
+            }
+        }
+    };
+
+    return 0;
+}
+
+static int nvdec_vp8_frame_params(AVCodecContext *avctx,
+                                  AVBufferRef *hw_frames_ctx)
+{
+    // VP8 uses a fixed size pool of 3 possible reference frames
+    return ff_nvdec_frame_params(avctx, hw_frames_ctx, 3, 0);
+}
+
+AVHWAccel ff_vp8_nvdec_hwaccel = {
+    .name                 = "vp8_nvdec",
+    .type                 = AVMEDIA_TYPE_VIDEO,
+    .id                   = AV_CODEC_ID_VP8,
+    .pix_fmt              = AV_PIX_FMT_CUDA,
+    .start_frame          = nvdec_vp8_start_frame,
+    .end_frame            = ff_nvdec_simple_end_frame,
+    .decode_slice         = ff_nvdec_simple_decode_slice,
+    .frame_params         = nvdec_vp8_frame_params,
+    .init                 = ff_nvdec_decode_init,
+    .uninit               = ff_nvdec_decode_uninit,
+    .priv_data_size       = sizeof(NVDECContext),
+};