| /* |
| * 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), |
| }; |