git.sesse.net Git - ffmpeg/blob - libavcodec/nvdec_vc1.c

   1 /*
   2  * VC1 HW decode acceleration through NVDEC
   3  *
   4  * Copyright (c) 2017 Philip Langdale
   5  *
   6  * This file is part of FFmpeg.
   7  *
   8  * FFmpeg is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public
  10  * License as published by the Free Software Foundation; either
  11  * version 2.1 of the License, or (at your option) any later version.
  12  *
  13  * FFmpeg is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * Lesser General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Lesser General Public
  19  * License along with FFmpeg; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  21  */
  22
  23 #include "avcodec.h"
  24 #include "nvdec.h"
  25 #include "decode.h"
  26 #include "vc1.h"
  27
  28 static unsigned char get_ref_idx(AVFrame *frame)
  29 {
  30     FrameDecodeData *fdd;
  31     NVDECFrame *cf;
  32
  33     if (!frame || !frame->private_ref)
  34         return 255;
  35
  36     fdd = (FrameDecodeData*)frame->private_ref->data;
  37     cf  = (NVDECFrame*)fdd->hwaccel_priv;
  38
  39     return cf->idx;
  40 }
  41
  42 static int nvdec_vc1_start_frame(AVCodecContext *avctx, const uint8_t *buffer, uint32_t size)
  43 {
  44     VC1Context *v = avctx->priv_data;
  45     MpegEncContext *s = &v->s;
  46
  47     NVDECContext      *ctx = avctx->internal->hwaccel_priv_data;
  48     CUVIDPICPARAMS     *pp = &ctx->pic_params;
  49     FrameDecodeData *fdd;
  50     NVDECFrame *cf;
  51     AVFrame *cur_frame = s->current_picture.f;
  52
  53     int ret;
  54
  55     ret = ff_nvdec_start_frame(avctx, cur_frame);
  56     if (ret < 0)
  57         return ret;
  58
  59     fdd = (FrameDecodeData*)cur_frame->private_ref->data;
  60     cf  = (NVDECFrame*)fdd->hwaccel_priv;
  61
  62     *pp = (CUVIDPICPARAMS) {
  63         .PicWidthInMbs     = (cur_frame->width  + 15) / 16,
  64         .FrameHeightInMbs  = (cur_frame->height + 15) / 16,
  65         .CurrPicIdx        = cf->idx,
  66         .field_pic_flag    = v->field_mode,
  67         .bottom_field_flag = v->cur_field_type,
  68         .second_field      = v->second_field,
  69
  70         .intra_pic_flag    = s->pict_type == AV_PICTURE_TYPE_I ||
  71                              s->pict_type == AV_PICTURE_TYPE_BI,
  72         .ref_pic_flag      = s->pict_type == AV_PICTURE_TYPE_I ||
  73                              s->pict_type == AV_PICTURE_TYPE_P,
  74
  75         .CodecSpecific.vc1 = {
  76             .ForwardRefIdx     = get_ref_idx(s->last_picture.f),
  77             .BackwardRefIdx    = get_ref_idx(s->next_picture.f),
  78             .FrameWidth        = cur_frame->width,
  79             .FrameHeight       = cur_frame->height,
  80
  81             .intra_pic_flag    = s->pict_type == AV_PICTURE_TYPE_I ||
  82                                  s->pict_type == AV_PICTURE_TYPE_BI,
  83             .ref_pic_flag      = s->pict_type == AV_PICTURE_TYPE_I ||
  84                                  s->pict_type == AV_PICTURE_TYPE_P,
  85             .progressive_fcm   = v->fcm == 0,
  86
  87             .profile           = v->profile,
  88             .postprocflag      = v->postprocflag,
  89             .pulldown          = v->broadcast,
  90             .interlace         = v->interlace,
  91             .tfcntrflag        = v->tfcntrflag,
  92             .finterpflag       = v->finterpflag,
  93             .psf               = v->psf,
  94             .multires          = v->multires,
  95             .syncmarker        = v->resync_marker,
  96             .rangered          = v->rangered,
  97             .maxbframes        = s->max_b_frames,
  98
  99             .panscan_flag      = v->panscanflag,
 100             .refdist_flag      = v->refdist_flag,
 101             .extended_mv       = v->extended_mv,
 102             .dquant            = v->dquant,
 103             .vstransform       = v->vstransform,
 104             .loopfilter        = v->s.loop_filter,
 105             .fastuvmc          = v->fastuvmc,
 106             .overlap           = v->overlap,
 107             .quantizer         = v->quantizer_mode,
 108             .extended_dmv      = v->extended_dmv,
 109             .range_mapy_flag   = v->range_mapy_flag,
 110             .range_mapy        = v->range_mapy,
 111             .range_mapuv_flag  = v->range_mapuv_flag,
 112             .range_mapuv       = v->range_mapuv,
 113             .rangeredfrm       = v->rangeredfrm,
 114         }
 115     };
 116
 117     return 0;
 118 }
 119
 120 static int nvdec_vc1_end_frame(AVCodecContext *avctx)
 121 {
 122     NVDECContext *ctx = avctx->internal->hwaccel_priv_data;
 123     int ret = ff_nvdec_end_frame(avctx);
 124     ctx->bitstream = NULL;
 125     return ret;
 126 }
 127
 128 static int nvdec_vc1_decode_slice(AVCodecContext *avctx, const uint8_t *buffer, uint32_t size)
 129 {
 130     NVDECContext *ctx = avctx->internal->hwaccel_priv_data;
 131     void *tmp;
 132
 133     tmp = av_fast_realloc(ctx->slice_offsets, &ctx->slice_offsets_allocated,
 134                           (ctx->nb_slices + 1) * sizeof(*ctx->slice_offsets));
 135     if (!tmp)
 136         return AVERROR(ENOMEM);
 137     ctx->slice_offsets = tmp;
 138
 139     if (!ctx->bitstream)
 140         ctx->bitstream = (uint8_t*)buffer;
 141
 142     ctx->slice_offsets[ctx->nb_slices] = buffer - ctx->bitstream;
 143     ctx->bitstream_len += size;
 144     ctx->nb_slices++;
 145
 146     return 0;
 147 }
 148
 149 static int nvdec_vc1_frame_params(AVCodecContext *avctx,
 150                                   AVBufferRef *hw_frames_ctx)
 151 {
 152     // Each frame can at most have one P and one B reference
 153     return ff_nvdec_frame_params(avctx, hw_frames_ctx, 2);
 154 }
 155
 156 AVHWAccel ff_vc1_nvdec_hwaccel = {
 157     .name                 = "vc1_nvdec",
 158     .type                 = AVMEDIA_TYPE_VIDEO,
 159     .id                   = AV_CODEC_ID_VC1,
 160     .pix_fmt              = AV_PIX_FMT_CUDA,
 161     .start_frame          = nvdec_vc1_start_frame,
 162     .end_frame            = nvdec_vc1_end_frame,
 163     .decode_slice         = nvdec_vc1_decode_slice,
 164     .frame_params         = nvdec_vc1_frame_params,
 165     .init                 = ff_nvdec_decode_init,
 166     .uninit               = ff_nvdec_decode_uninit,
 167     .priv_data_size       = sizeof(NVDECContext),
 168 };
 169
 170 #if CONFIG_WMV3_NVDEC_HWACCEL
 171 AVHWAccel ff_wmv3_nvdec_hwaccel = {
 172     .name                 = "wmv3_nvdec",
 173     .type                 = AVMEDIA_TYPE_VIDEO,
 174     .id                   = AV_CODEC_ID_WMV3,
 175     .pix_fmt              = AV_PIX_FMT_CUDA,
 176     .start_frame          = nvdec_vc1_start_frame,
 177     .end_frame            = nvdec_vc1_end_frame,
 178     .decode_slice         = nvdec_vc1_decode_slice,
 179     .frame_params         = nvdec_vc1_frame_params,
 180     .init                 = ff_nvdec_decode_init,
 181     .uninit               = ff_nvdec_decode_uninit,
 182     .priv_data_size       = sizeof(NVDECContext),
 183 };
 184 #endif