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avcodec: Implement vc1 nvdec hwaccel
This hwaccel is interesting because it also works for wmv3/9 content, which is not supported by the nvidia parser used by cuviddec.
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- +3 −0 configure
- +1 −0 libavcodec/Makefile
- +2 −0 libavcodec/allcodecs.c
- +2 −0 libavcodec/nvdec.c
- +182 −0 libavcodec/nvdec_vc1.c
- +3 −0 libavcodec/vc1dec.c
| @@ -0,0 +1,182 @@ | ||
| /* | ||
| * VC1 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 | ||
| */ | ||
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|
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| #include "avcodec.h" | ||
| #include "nvdec.h" | ||
| #include "decode.h" | ||
| #include "vc1.h" | ||
|
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| static unsigned char get_ref_idx(AVFrame *frame) | ||
| { | ||
| FrameDecodeData *fdd; | ||
| NVDECFrame *cf; | ||
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|
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| if (!frame || !frame->private_ref) | ||
| return 255; | ||
|
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| fdd = (FrameDecodeData*)frame->private_ref->data; | ||
| cf = (NVDECFrame*)fdd->hwaccel_priv; | ||
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| return cf->idx; | ||
| } | ||
|
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| static int nvdec_vc1_start_frame(AVCodecContext *avctx, const uint8_t *buffer, uint32_t size) | ||
| { | ||
| VC1Context *v = avctx->priv_data; | ||
| MpegEncContext *s = &v->s; | ||
|
|
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| NVDECContext *ctx = avctx->internal->hwaccel_priv_data; | ||
| CUVIDPICPARAMS *pp = &ctx->pic_params; | ||
| FrameDecodeData *fdd; | ||
| NVDECFrame *cf; | ||
| AVFrame *cur_frame = s->current_picture.f; | ||
|
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| int ret; | ||
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| ret = ff_nvdec_start_frame(avctx, cur_frame); | ||
| if (ret < 0) | ||
| return ret; | ||
|
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| fdd = (FrameDecodeData*)cur_frame->private_ref->data; | ||
| cf = (NVDECFrame*)fdd->hwaccel_priv; | ||
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| *pp = (CUVIDPICPARAMS) { | ||
| .PicWidthInMbs = (cur_frame->width + 15) / 16, | ||
| .FrameHeightInMbs = (cur_frame->height + 15) / 16, | ||
| .CurrPicIdx = cf->idx, | ||
| .field_pic_flag = v->field_mode, | ||
| .bottom_field_flag = v->cur_field_type, | ||
| .second_field = v->second_field, | ||
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| .intra_pic_flag = s->pict_type == AV_PICTURE_TYPE_I || | ||
| s->pict_type == AV_PICTURE_TYPE_BI, | ||
| .ref_pic_flag = s->pict_type == AV_PICTURE_TYPE_I || | ||
| s->pict_type == AV_PICTURE_TYPE_P, | ||
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| .CodecSpecific.vc1 = { | ||
| .ForwardRefIdx = get_ref_idx(s->last_picture.f), | ||
| .BackwardRefIdx = get_ref_idx(s->next_picture.f), | ||
| .FrameWidth = cur_frame->width, | ||
| .FrameHeight = cur_frame->height, | ||
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| .intra_pic_flag = s->pict_type == AV_PICTURE_TYPE_I || | ||
| s->pict_type == AV_PICTURE_TYPE_BI, | ||
| .ref_pic_flag = s->pict_type == AV_PICTURE_TYPE_I || | ||
| s->pict_type == AV_PICTURE_TYPE_P, | ||
| .progressive_fcm = v->fcm == 0, | ||
|
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| .profile = v->profile, | ||
| .postprocflag = v->postprocflag, | ||
| .pulldown = v->broadcast, | ||
| .interlace = v->interlace, | ||
| .tfcntrflag = v->tfcntrflag, | ||
| .finterpflag = v->finterpflag, | ||
| .psf = v->psf, | ||
| .multires = v->multires, | ||
| .syncmarker = v->resync_marker, | ||
| .rangered = v->rangered, | ||
| .maxbframes = s->max_b_frames, | ||
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| .panscan_flag = v->panscanflag, | ||
| .refdist_flag = v->refdist_flag, | ||
| .extended_mv = v->extended_mv, | ||
| .dquant = v->dquant, | ||
| .vstransform = v->vstransform, | ||
| .loopfilter = v->s.loop_filter, | ||
| .fastuvmc = v->fastuvmc, | ||
| .overlap = v->overlap, | ||
| .quantizer = v->quantizer_mode, | ||
| .extended_dmv = v->extended_dmv, | ||
| .range_mapy_flag = v->range_mapy_flag, | ||
| .range_mapy = v->range_mapy, | ||
| .range_mapuv_flag = v->range_mapuv_flag, | ||
| .range_mapuv = v->range_mapuv, | ||
| .rangeredfrm = v->rangeredfrm, | ||
| } | ||
| }; | ||
|
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| return 0; | ||
| } | ||
|
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| static int nvdec_vc1_end_frame(AVCodecContext *avctx) | ||
| { | ||
| NVDECContext *ctx = avctx->internal->hwaccel_priv_data; | ||
| int ret = ff_nvdec_end_frame(avctx); | ||
| ctx->bitstream = NULL; | ||
| return ret; | ||
| } | ||
|
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| static int nvdec_vc1_decode_slice(AVCodecContext *avctx, const uint8_t *buffer, uint32_t size) | ||
| { | ||
| NVDECContext *ctx = avctx->internal->hwaccel_priv_data; | ||
| void *tmp; | ||
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| tmp = av_fast_realloc(ctx->slice_offsets, &ctx->slice_offsets_allocated, | ||
| (ctx->nb_slices + 1) * sizeof(*ctx->slice_offsets)); | ||
| if (!tmp) | ||
| return AVERROR(ENOMEM); | ||
| ctx->slice_offsets = tmp; | ||
|
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| if (!ctx->bitstream) | ||
| ctx->bitstream = (uint8_t*)buffer; | ||
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| ctx->slice_offsets[ctx->nb_slices] = buffer - ctx->bitstream; | ||
| ctx->bitstream_len += size; | ||
| ctx->nb_slices++; | ||
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| return 0; | ||
| } | ||
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| static int nvdec_vc1_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); | ||
| } | ||
|
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| AVHWAccel ff_vc1_nvdec_hwaccel = { | ||
| .name = "vc1_nvdec", | ||
| .type = AVMEDIA_TYPE_VIDEO, | ||
| .id = AV_CODEC_ID_VC1, | ||
| .pix_fmt = AV_PIX_FMT_CUDA, | ||
| .start_frame = nvdec_vc1_start_frame, | ||
| .end_frame = nvdec_vc1_end_frame, | ||
| .decode_slice = nvdec_vc1_decode_slice, | ||
| .frame_params = nvdec_vc1_frame_params, | ||
| .init = ff_nvdec_decode_init, | ||
| .uninit = ff_nvdec_decode_uninit, | ||
| .priv_data_size = sizeof(NVDECContext), | ||
| }; | ||
|
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| AVHWAccel ff_wmv3_nvdec_hwaccel = { | ||
| .name = "wmv3_nvdec", | ||
| .type = AVMEDIA_TYPE_VIDEO, | ||
| .id = AV_CODEC_ID_WMV3, | ||
| .pix_fmt = AV_PIX_FMT_CUDA, | ||
| .start_frame = nvdec_vc1_start_frame, | ||
| .end_frame = nvdec_vc1_end_frame, | ||
| .decode_slice = nvdec_vc1_decode_slice, | ||
| .frame_params = nvdec_vc1_frame_params, | ||
| .init = ff_nvdec_decode_init, | ||
| .uninit = ff_nvdec_decode_uninit, | ||
| .priv_data_size = sizeof(NVDECContext), | ||
| }; |