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/*
* 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[VP8_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[VP8_FRAME_PREVIOUS]),
.GoldenRefIdx = safe_get_ref_idx(h->framep[VP8_FRAME_GOLDEN]),
.AltRefIdx = safe_get_ref_idx(h->framep[VP8_FRAME_ALTREF]),
/*
* 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);
}
const 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),
};
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