106 lines
3.7 KiB
C
106 lines
3.7 KiB
C
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/*
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* VP8 HW decode acceleration through NVDEC
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*
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* Copyright (c) 2017 Philip Langdale
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "avcodec.h"
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#include "nvdec.h"
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#include "decode.h"
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#include "internal.h"
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#include "vp8.h"
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static unsigned char safe_get_ref_idx(VP8Frame *frame)
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{
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return frame ? ff_nvdec_get_ref_idx(frame->tf.f) : 255;
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}
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static int nvdec_vp8_start_frame(AVCodecContext *avctx, const uint8_t *buffer, uint32_t size)
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{
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VP8Context *h = avctx->priv_data;
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NVDECContext *ctx = avctx->internal->hwaccel_priv_data;
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CUVIDPICPARAMS *pp = &ctx->pic_params;
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FrameDecodeData *fdd;
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NVDECFrame *cf;
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AVFrame *cur_frame = h->framep[VP56_FRAME_CURRENT]->tf.f;
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int ret;
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ret = ff_nvdec_start_frame(avctx, cur_frame);
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if (ret < 0)
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return ret;
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fdd = (FrameDecodeData*)cur_frame->private_ref->data;
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cf = (NVDECFrame*)fdd->hwaccel_priv;
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*pp = (CUVIDPICPARAMS) {
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.PicWidthInMbs = (cur_frame->width + 15) / 16,
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.FrameHeightInMbs = (cur_frame->height + 15) / 16,
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.CurrPicIdx = cf->idx,
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.CodecSpecific.vp8 = {
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.width = cur_frame->width,
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.height = cur_frame->height,
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.first_partition_size = h->header_partition_size,
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.LastRefIdx = safe_get_ref_idx(h->framep[VP56_FRAME_PREVIOUS]),
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.GoldenRefIdx = safe_get_ref_idx(h->framep[VP56_FRAME_GOLDEN]),
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.AltRefIdx = safe_get_ref_idx(h->framep[VP56_FRAME_GOLDEN2]),
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/*
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* Explicit braces for anonymous inners and unnamed fields
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* to work around limitations in ancient versions of gcc.
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*/
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{ // union
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{ // struct
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!h->keyframe, // frame_type
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h->profile, // version
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!h->invisible, // show_frame
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h->segmentation.enabled ? // update_mb_segmentation_data
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h->segmentation.update_feature_data : 0,
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}
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}
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}
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};
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return 0;
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}
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static int nvdec_vp8_frame_params(AVCodecContext *avctx,
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AVBufferRef *hw_frames_ctx)
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{
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// VP8 uses a fixed size pool of 3 possible reference frames
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return ff_nvdec_frame_params(avctx, hw_frames_ctx, 3, 0);
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}
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AVHWAccel ff_vp8_nvdec_hwaccel = {
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.name = "vp8_nvdec",
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.type = AVMEDIA_TYPE_VIDEO,
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.id = AV_CODEC_ID_VP8,
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.pix_fmt = AV_PIX_FMT_CUDA,
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.start_frame = nvdec_vp8_start_frame,
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.end_frame = ff_nvdec_simple_end_frame,
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.decode_slice = ff_nvdec_simple_decode_slice,
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.frame_params = nvdec_vp8_frame_params,
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.init = ff_nvdec_decode_init,
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.uninit = ff_nvdec_decode_uninit,
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.priv_data_size = sizeof(NVDECContext),
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};
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