mirror of https://github.com/FFmpeg/FFmpeg.git
This is mostly straight-forward. The weird part is that it should just work for mpeg1, but I see corruption in my test cases, so I'm going to try and fix that separately.pull/272/head
Philip Langdale
7 years ago
parent
5a0f6b099f
commit
7c9f739d86
8 changed files with 167 additions and 7 deletions
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/*
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* MPEG-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 "avcodec.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 get_ref_idx(AVFrame *frame) |
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{ |
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FrameDecodeData *fdd; |
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NVDECFrame *cf; |
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if (!frame || !frame->private_ref) |
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return -1; |
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fdd = (FrameDecodeData*)frame->private_ref->data; |
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cf = (NVDECFrame*)fdd->hwaccel_priv; |
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if (!cf) |
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return -1; |
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return cf->idx; |
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} |
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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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.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 = get_ref_idx(s->last_picture.f), |
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.BackwardRefIdx = 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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ppc->QuantMatrixIntra[i] = s->intra_matrix[i]; |
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ppc->QuantMatrixInter[i] = s->inter_matrix[i]; |
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} |
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return 0; |
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} |
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static int nvdec_mpeg12_end_frame(AVCodecContext *avctx) |
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{ |
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NVDECContext *ctx = avctx->internal->hwaccel_priv_data; |
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int ret = ff_nvdec_end_frame(avctx); |
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ctx->bitstream = NULL; |
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return ret; |
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} |
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static int nvdec_mpeg12_decode_slice(AVCodecContext *avctx, const uint8_t *buffer, uint32_t size) |
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{ |
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NVDECContext *ctx = avctx->internal->hwaccel_priv_data; |
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void *tmp; |
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tmp = av_fast_realloc(ctx->slice_offsets, &ctx->slice_offsets_allocated, |
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(ctx->nb_slices + 1) * sizeof(*ctx->slice_offsets)); |
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if (!tmp) |
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return AVERROR(ENOMEM); |
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ctx->slice_offsets = tmp; |
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if (!ctx->bitstream) |
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ctx->bitstream = (uint8_t*)buffer; |
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ctx->slice_offsets[ctx->nb_slices] = buffer - ctx->bitstream; |
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ctx->bitstream_len += size; |
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ctx->nb_slices++; |
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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); |
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} |
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#if CONFIG_MPEG2_NVDEC_HWACCEL |
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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 = nvdec_mpeg12_end_frame, |
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.decode_slice = nvdec_mpeg12_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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