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https://github.com/FFmpeg/FFmpeg.git
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e6f7183eb6
The matrix coefficients are stored permutated for the IDCT, rather then in plain raster order, and need to be un-permutated for the hardware.
132 lines
4.9 KiB
C
132 lines
4.9 KiB
C
/*
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* MPEG-1/2 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 "config_components.h"
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#include "avcodec.h"
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#include "internal.h"
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#include "mpegvideo.h"
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#include "nvdec.h"
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#include "decode.h"
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static int nvdec_mpeg12_start_frame(AVCodecContext *avctx, const uint8_t *buffer, uint32_t size)
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{
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MpegEncContext *s = 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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CUVIDMPEG2PICPARAMS *ppc = &pp->CodecSpecific.mpeg2;
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FrameDecodeData *fdd;
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NVDECFrame *cf;
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AVFrame *cur_frame = s->current_picture.f;
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int ret, i;
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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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.field_pic_flag = s->picture_structure != PICT_FRAME,
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.bottom_field_flag = s->picture_structure == PICT_BOTTOM_FIELD,
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.second_field = s->picture_structure != PICT_FRAME && !s->first_field,
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.intra_pic_flag = s->pict_type == AV_PICTURE_TYPE_I,
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.ref_pic_flag = s->pict_type == AV_PICTURE_TYPE_I ||
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s->pict_type == AV_PICTURE_TYPE_P,
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.CodecSpecific.mpeg2 = {
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.ForwardRefIdx = ff_nvdec_get_ref_idx(s->last_picture.f),
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.BackwardRefIdx = ff_nvdec_get_ref_idx(s->next_picture.f),
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.picture_coding_type = s->pict_type,
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.full_pel_forward_vector = s->full_pel[0],
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.full_pel_backward_vector = s->full_pel[1],
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.f_code = { { s->mpeg_f_code[0][0],
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s->mpeg_f_code[0][1] },
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{ s->mpeg_f_code[1][0],
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s->mpeg_f_code[1][1] } },
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.intra_dc_precision = s->intra_dc_precision,
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.frame_pred_frame_dct = s->frame_pred_frame_dct,
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.concealment_motion_vectors = s->concealment_motion_vectors,
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.q_scale_type = s->q_scale_type,
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.intra_vlc_format = s->intra_vlc_format,
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.alternate_scan = s->alternate_scan,
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.top_field_first = s->top_field_first,
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}
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};
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for (i = 0; i < 64; ++i) {
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int n = s->idsp.idct_permutation[i];
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ppc->QuantMatrixIntra[i] = s->intra_matrix[n];
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ppc->QuantMatrixInter[i] = s->inter_matrix[n];
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}
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return 0;
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}
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static int nvdec_mpeg12_frame_params(AVCodecContext *avctx,
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AVBufferRef *hw_frames_ctx)
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{
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// Each frame can at most have one P and one B reference
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return ff_nvdec_frame_params(avctx, hw_frames_ctx, 2, 0);
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}
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#if CONFIG_MPEG2_NVDEC_HWACCEL
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const AVHWAccel ff_mpeg2_nvdec_hwaccel = {
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.name = "mpeg2_nvdec",
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.type = AVMEDIA_TYPE_VIDEO,
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.id = AV_CODEC_ID_MPEG2VIDEO,
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.pix_fmt = AV_PIX_FMT_CUDA,
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.start_frame = nvdec_mpeg12_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_mpeg12_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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#endif
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#if CONFIG_MPEG1_NVDEC_HWACCEL
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const AVHWAccel ff_mpeg1_nvdec_hwaccel = {
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.name = "mpeg1_nvdec",
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.type = AVMEDIA_TYPE_VIDEO,
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.id = AV_CODEC_ID_MPEG1VIDEO,
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.pix_fmt = AV_PIX_FMT_CUDA,
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.start_frame = nvdec_mpeg12_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_mpeg12_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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#endif
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