Add support for VP9 VDPAU hwaccel decode

Support for VDPAU accelerated VP9 decoding was added with libvdpau-1.3.
Support for the same in ffmpeg is added with this patch. Profiles
related to VDPAU VP9 can be found in latest vdpau.h present in
libvdpau-1.3. DRC clips are not supported yet due to
http://trac.ffmpeg.org/ticket/8068

Add VP9 VDPAU to list of hwaccels and supported formats
Added file vdpau_vp9.c and Modified configure to add VDPAU VP9 support.
Mapped VP9 profiles to VDPAU VP9 profiles. Populated the codec specific
params that need to be passed to VDPAU.

Signed-off-by: Philip Langdale <philipl@overt.org>

1 files changed, 242 insertions, 0 deletions

diff --git a/libavcodec/vdpau_vp9.c b/libavcodec/vdpau_vp9.c
new file mode 100644
index 0000000000..f1ee4ac5e0
--- /dev/null
+++ b/libavcodec/vdpau_vp9.c
@@ -0,0 +1,242 @@
+/*
+ * VP9 HW decode acceleration through VDPAU
+ *
+ * Copyright (c) 2019 Manoj Gupta Bonda
+ *
+ * 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 <vdpau/vdpau.h>
+#include "libavutil/pixdesc.h"
+#include "avcodec.h"
+#include "internal.h"
+#include "vp9data.h"
+#include "vp9dec.h"
+#include "hwaccel.h"
+#include "vdpau.h"
+#include "vdpau_internal.h"
+
+static int vdpau_vp9_start_frame(AVCodecContext *avctx,
+                                  const uint8_t *buffer, uint32_t size)
+{
+    VP9Context *s = avctx->priv_data;
+    VP9SharedContext *h = &(s->s);
+    const AVPixFmtDescriptor *pixdesc = av_pix_fmt_desc_get(avctx->sw_pix_fmt);
+    if (!pixdesc) {
+        return AV_PIX_FMT_NONE;
+    }
+
+    VP9Frame pic = h->frames[CUR_FRAME];
+    struct vdpau_picture_context *pic_ctx = pic.hwaccel_picture_private;
+    int i;
+
+    VdpPictureInfoVP9 *info = &pic_ctx->info.vp9;
+
+    info->width = avctx->width;
+    info->height = avctx->height;
+    /*  fill LvPictureInfoVP9 struct */
+    info->lastReference  = VDP_INVALID_HANDLE;
+    info->goldenReference = VDP_INVALID_HANDLE;
+    info->altReference = VDP_INVALID_HANDLE;
+
+    if (h->refs[h->h.refidx[0]].f && h->refs[h->h.refidx[0]].f->private_ref) {
+        info->lastReference               = ff_vdpau_get_surface_id(h->refs[h->h.refidx[0]].f);
+    }
+    if (h->refs[h->h.refidx[1]].f && h->refs[h->h.refidx[1]].f->private_ref) {
+        info->goldenReference             = ff_vdpau_get_surface_id(h->refs[h->h.refidx[1]].f);
+    }
+    if (h->refs[h->h.refidx[2]].f && h->refs[h->h.refidx[2]].f->private_ref) {
+        info->altReference                = ff_vdpau_get_surface_id(h->refs[h->h.refidx[2]].f);
+    }
+
+    info->profile                  = h->h.profile;
+    info->frameContextIdx          = h->h.framectxid;
+    info->keyFrame                 = h->h.keyframe;
+    info->showFrame                = !h->h.invisible;
+    info->errorResilient           = h->h.errorres;
+    info->frameParallelDecoding    = h->h.parallelmode;
+
+    info->subSamplingX             = pixdesc->log2_chroma_w;
+    info->subSamplingY             = pixdesc->log2_chroma_h;
+
+    info->intraOnly                = h->h.intraonly;
+    info->allowHighPrecisionMv     = h->h.keyframe ? 0 : h->h.highprecisionmvs;
+    info->refreshEntropyProbs      = h->h.refreshctx;
+
+    info->bitDepthMinus8Luma       = pixdesc->comp[0].depth - 8;
+    info->bitDepthMinus8Chroma     = pixdesc->comp[1].depth - 8;
+
+    info->loopFilterLevel          = h->h.filter.level;
+    info->loopFilterSharpness      = h->h.filter.sharpness;
+    info->modeRefLfEnabled         = h->h.lf_delta.enabled;
+
+    info->log2TileColumns          = h->h.tiling.log2_tile_cols;
+    info->log2TileRows             = h->h.tiling.log2_tile_rows;
+
+    info->segmentEnabled           = h->h.segmentation.enabled;
+    info->segmentMapUpdate         = h->h.segmentation.update_map;
+    info->segmentMapTemporalUpdate = h->h.segmentation.temporal;
+    info->segmentFeatureMode       = h->h.segmentation.absolute_vals;
+
+    info->qpYAc                    = h->h.yac_qi;
+    info->qpYDc                    = h->h.ydc_qdelta;
+    info->qpChDc                   = h->h.uvdc_qdelta;
+    info->qpChAc                   = h->h.uvac_qdelta;
+
+    info->resetFrameContext        = h->h.resetctx;
+    info->mcompFilterType          = h->h.filtermode ^ (h->h.filtermode <= 1);
+    info->uncompressedHeaderSize   = h->h.uncompressed_header_size;
+    info->compressedHeaderSize     = h->h.compressed_header_size;
+    info->refFrameSignBias[0]      = 0;
+
+
+    for (i = 0; i < FF_ARRAY_ELEMS(info->mbModeLfDelta); i++)
+        info->mbModeLfDelta[i] = h->h.lf_delta.mode[i];
+
+    for (i = 0; i < FF_ARRAY_ELEMS(info->mbRefLfDelta); i++)
+        info->mbRefLfDelta[i] = h->h.lf_delta.ref[i];
+
+    for (i = 0; i < FF_ARRAY_ELEMS(info->mbSegmentTreeProbs); i++)
+        info->mbSegmentTreeProbs[i] = h->h.segmentation.prob[i];
+
+    for (i = 0; i < FF_ARRAY_ELEMS(info->activeRefIdx); i++) {
+        info->activeRefIdx[i] = h->h.refidx[i];
+        info->segmentPredProbs[i] = h->h.segmentation.pred_prob[i];
+        info->refFrameSignBias[i + 1] = h->h.signbias[i];
+    }
+
+    for (i = 0; i < FF_ARRAY_ELEMS(info->segmentFeatureEnable); i++) {
+        info->segmentFeatureEnable[i][0] = h->h.segmentation.feat[i].q_enabled;
+        info->segmentFeatureEnable[i][1] = h->h.segmentation.feat[i].lf_enabled;
+        info->segmentFeatureEnable[i][2] = h->h.segmentation.feat[i].ref_enabled;
+        info->segmentFeatureEnable[i][3] = h->h.segmentation.feat[i].skip_enabled;
+
+        info->segmentFeatureData[i][0] = h->h.segmentation.feat[i].q_val;
+        info->segmentFeatureData[i][1] = h->h.segmentation.feat[i].lf_val;
+        info->segmentFeatureData[i][2] = h->h.segmentation.feat[i].ref_val;
+        info->segmentFeatureData[i][3] = 0;
+    }
+
+    switch (avctx->colorspace) {
+    default:
+    case AVCOL_SPC_UNSPECIFIED:
+        info->colorSpace = 0;
+        break;
+    case AVCOL_SPC_BT470BG:
+        info->colorSpace = 1;
+        break;
+    case AVCOL_SPC_BT709:
+        info->colorSpace = 2;
+        break;
+    case AVCOL_SPC_SMPTE170M:
+        info->colorSpace = 3;
+        break;
+    case AVCOL_SPC_SMPTE240M:
+        info->colorSpace = 4;
+        break;
+    case AVCOL_SPC_BT2020_NCL:
+        info->colorSpace = 5;
+        break;
+    case AVCOL_SPC_RESERVED:
+        info->colorSpace = 6;
+        break;
+    case AVCOL_SPC_RGB:
+        info->colorSpace = 7;
+        break;
+    }
+
+    return ff_vdpau_common_start_frame(pic_ctx, buffer, size);
+
+}
+
+static const uint8_t start_code_prefix[3] = { 0x00, 0x00, 0x01 };
+
+static int vdpau_vp9_decode_slice(AVCodecContext *avctx,
+                                   const uint8_t *buffer, uint32_t size)
+{
+    VP9SharedContext *h = avctx->priv_data;
+    VP9Frame pic = h->frames[CUR_FRAME];
+    struct vdpau_picture_context *pic_ctx = pic.hwaccel_picture_private;
+
+    int val;
+
+    val = ff_vdpau_add_buffer(pic_ctx, start_code_prefix, 3);
+    if (val)
+        return val;
+
+    val = ff_vdpau_add_buffer(pic_ctx, buffer, size);
+    if (val)
+        return val;
+
+    return 0;
+}
+
+static int vdpau_vp9_end_frame(AVCodecContext *avctx)
+{
+    VP9SharedContext *h = avctx->priv_data;
+    VP9Frame pic = h->frames[CUR_FRAME];
+    struct vdpau_picture_context *pic_ctx = pic.hwaccel_picture_private;
+
+    int val;
+
+    val = ff_vdpau_common_end_frame(avctx, pic.tf.f, pic_ctx);
+    if (val < 0)
+        return val;
+
+    return 0;
+}
+
+static int vdpau_vp9_init(AVCodecContext *avctx)
+{
+    VdpDecoderProfile profile;
+    uint32_t level = avctx->level;
+
+    switch (avctx->profile) {
+    case FF_PROFILE_VP9_0:
+        profile = VDP_DECODER_PROFILE_VP9_PROFILE_0;
+        break;
+    case FF_PROFILE_VP9_1:
+        profile = VDP_DECODER_PROFILE_VP9_PROFILE_1;
+        break;
+    case FF_PROFILE_VP9_2:
+        profile = VDP_DECODER_PROFILE_VP9_PROFILE_2;
+        break;
+    case FF_PROFILE_VP9_3:
+        profile = VDP_DECODER_PROFILE_VP9_PROFILE_3;
+        break;
+    default:
+        return AVERROR(ENOTSUP);
+    }
+
+    return ff_vdpau_common_init(avctx, profile, level);
+}
+
+const AVHWAccel ff_vp9_vdpau_hwaccel = {
+    .name           = "vp9_vdpau",
+    .type           = AVMEDIA_TYPE_VIDEO,
+    .id             = AV_CODEC_ID_VP9,
+    .pix_fmt        = AV_PIX_FMT_VDPAU,
+    .start_frame    = vdpau_vp9_start_frame,
+    .end_frame      = vdpau_vp9_end_frame,
+    .decode_slice   = vdpau_vp9_decode_slice,
+    .frame_priv_data_size = sizeof(struct vdpau_picture_context),
+    .init           = vdpau_vp9_init,
+    .uninit         = ff_vdpau_common_uninit,
+    .frame_params   = ff_vdpau_common_frame_params,
+    .priv_data_size = sizeof(VDPAUContext),
+    .caps_internal  = HWACCEL_CAP_ASYNC_SAFE,
+};