mirror of https://git.ffmpeg.org/ffmpeg.git
129 lines
4.9 KiB
C
129 lines
4.9 KiB
C
/*
|
|
* MPEG-1/2 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 "mpegvideo.h"
|
|
#include "nvdec.h"
|
|
#include "decode.h"
|
|
|
|
static int nvdec_mpeg12_start_frame(AVCodecContext *avctx, const uint8_t *buffer, uint32_t size)
|
|
{
|
|
MpegEncContext *s = avctx->priv_data;
|
|
|
|
NVDECContext *ctx = avctx->internal->hwaccel_priv_data;
|
|
CUVIDPICPARAMS *pp = &ctx->pic_params;
|
|
CUVIDMPEG2PICPARAMS *ppc = &pp->CodecSpecific.mpeg2;
|
|
FrameDecodeData *fdd;
|
|
NVDECFrame *cf;
|
|
AVFrame *cur_frame = s->current_picture.f;
|
|
|
|
int ret, i;
|
|
|
|
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,
|
|
|
|
.field_pic_flag = s->picture_structure != PICT_FRAME,
|
|
.bottom_field_flag = s->picture_structure == PICT_BOTTOM_FIELD,
|
|
.second_field = s->picture_structure != PICT_FRAME && !s->first_field,
|
|
|
|
.intra_pic_flag = s->pict_type == AV_PICTURE_TYPE_I,
|
|
.ref_pic_flag = s->pict_type == AV_PICTURE_TYPE_I ||
|
|
s->pict_type == AV_PICTURE_TYPE_P,
|
|
|
|
.CodecSpecific.mpeg2 = {
|
|
.ForwardRefIdx = ff_nvdec_get_ref_idx(s->last_picture.f),
|
|
.BackwardRefIdx = ff_nvdec_get_ref_idx(s->next_picture.f),
|
|
|
|
.picture_coding_type = s->pict_type,
|
|
.full_pel_forward_vector = s->full_pel[0],
|
|
.full_pel_backward_vector = s->full_pel[1],
|
|
.f_code = { { s->mpeg_f_code[0][0],
|
|
s->mpeg_f_code[0][1] },
|
|
{ s->mpeg_f_code[1][0],
|
|
s->mpeg_f_code[1][1] } },
|
|
.intra_dc_precision = s->intra_dc_precision,
|
|
.frame_pred_frame_dct = s->frame_pred_frame_dct,
|
|
.concealment_motion_vectors = s->concealment_motion_vectors,
|
|
.q_scale_type = s->q_scale_type,
|
|
.intra_vlc_format = s->intra_vlc_format,
|
|
.alternate_scan = s->alternate_scan,
|
|
.top_field_first = s->top_field_first,
|
|
}
|
|
};
|
|
|
|
for (i = 0; i < 64; ++i) {
|
|
int n = s->idsp.idct_permutation[i];
|
|
ppc->QuantMatrixIntra[i] = s->intra_matrix[n];
|
|
ppc->QuantMatrixInter[i] = s->inter_matrix[n];
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int nvdec_mpeg12_frame_params(AVCodecContext *avctx,
|
|
AVBufferRef *hw_frames_ctx)
|
|
{
|
|
// Each frame can at most have one P and one B reference
|
|
return ff_nvdec_frame_params(avctx, hw_frames_ctx, 2, 0);
|
|
}
|
|
|
|
#if CONFIG_MPEG2_NVDEC_HWACCEL
|
|
const AVHWAccel ff_mpeg2_nvdec_hwaccel = {
|
|
.name = "mpeg2_nvdec",
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.id = AV_CODEC_ID_MPEG2VIDEO,
|
|
.pix_fmt = AV_PIX_FMT_CUDA,
|
|
.start_frame = nvdec_mpeg12_start_frame,
|
|
.end_frame = ff_nvdec_simple_end_frame,
|
|
.decode_slice = ff_nvdec_simple_decode_slice,
|
|
.frame_params = nvdec_mpeg12_frame_params,
|
|
.init = ff_nvdec_decode_init,
|
|
.uninit = ff_nvdec_decode_uninit,
|
|
.priv_data_size = sizeof(NVDECContext),
|
|
};
|
|
#endif
|
|
|
|
#if CONFIG_MPEG1_NVDEC_HWACCEL
|
|
const AVHWAccel ff_mpeg1_nvdec_hwaccel = {
|
|
.name = "mpeg1_nvdec",
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.id = AV_CODEC_ID_MPEG1VIDEO,
|
|
.pix_fmt = AV_PIX_FMT_CUDA,
|
|
.start_frame = nvdec_mpeg12_start_frame,
|
|
.end_frame = ff_nvdec_simple_end_frame,
|
|
.decode_slice = ff_nvdec_simple_decode_slice,
|
|
.frame_params = nvdec_mpeg12_frame_params,
|
|
.init = ff_nvdec_decode_init,
|
|
.uninit = ff_nvdec_decode_uninit,
|
|
.priv_data_size = sizeof(NVDECContext),
|
|
};
|
|
#endif
|