git.sesse.net Git - ffmpeg/blob - libavcodec/vdpau_mpeg4.c

   1 /*
   2  * MPEG-4 Part 2 / H.263 decode acceleration through VDPAU
   3  *
   4  * Copyright (c) 2008 NVIDIA
   5  * Copyright (c) 2013 Rémi Denis-Courmont
   6  *
   7  * This file is part of FFmpeg.
   8  *
   9  * FFmpeg is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU Lesser General Public
  11  * License as published by the Free Software Foundation; either
  12  * version 2.1 of the License, or (at your option) any later version.
  13  *
  14  * FFmpeg is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17  * Lesser General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU Lesser General Public
  20  * License along with FFmpeg; if not, write to the Free Software Foundation,
  21  * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  22  */
  23
  24 #include <vdpau/vdpau.h>
  25
  26 #include "avcodec.h"
  27 #include "mpeg4video.h"
  28 #include "vdpau.h"
  29 #include "vdpau_internal.h"
  30
  31 static int vdpau_mpeg4_start_frame(AVCodecContext *avctx,
  32                                    const uint8_t *buffer, uint32_t size)
  33 {
  34     Mpeg4DecContext *ctx = avctx->priv_data;
  35     MpegEncContext * const s = &ctx->m;
  36     Picture *pic             = s->current_picture_ptr;
  37     struct vdpau_picture_context *pic_ctx = pic->hwaccel_picture_private;
  38     VdpPictureInfoMPEG4Part2 *info = &pic_ctx->info.mpeg4;
  39     VdpVideoSurface ref;
  40     int i;
  41
  42     /* fill VdpPictureInfoMPEG4Part2 struct */
  43     info->forward_reference  = VDP_INVALID_HANDLE;
  44     info->backward_reference = VDP_INVALID_HANDLE;
  45     info->vop_coding_type    = 0;
  46
  47     switch (s->pict_type) {
  48     case AV_PICTURE_TYPE_B:
  49         ref = ff_vdpau_get_surface_id(s->next_picture.f);
  50         assert(ref != VDP_INVALID_HANDLE);
  51         info->backward_reference = ref;
  52         info->vop_coding_type    = 2;
  53         /* fall-through */
  54     case AV_PICTURE_TYPE_P:
  55         ref = ff_vdpau_get_surface_id(s->last_picture.f);
  56         assert(ref != VDP_INVALID_HANDLE);
  57         info->forward_reference  = ref;
  58     }
  59
  60     info->trd[0]                            = s->pp_time;
  61     info->trb[0]                            = s->pb_time;
  62     info->trd[1]                            = s->pp_field_time >> 1;
  63     info->trb[1]                            = s->pb_field_time >> 1;
  64     info->vop_time_increment_resolution     = s->avctx->framerate.num;
  65     info->vop_fcode_forward                 = s->f_code;
  66     info->vop_fcode_backward                = s->b_code;
  67     info->resync_marker_disable             = !ctx->resync_marker;
  68     info->interlaced                        = !s->progressive_sequence;
  69     info->quant_type                        = s->mpeg_quant;
  70     info->quarter_sample                    = s->quarter_sample;
  71     info->short_video_header                = avctx->codec->id == AV_CODEC_ID_H263;
  72     info->rounding_control                  = s->no_rounding;
  73     info->alternate_vertical_scan_flag      = s->alternate_scan;
  74     info->top_field_first                   = s->top_field_first;
  75     for (i = 0; i < 64; ++i) {
  76         info->intra_quantizer_matrix[i]     = s->intra_matrix[i];
  77         info->non_intra_quantizer_matrix[i] = s->inter_matrix[i];
  78     }
  79
  80     ff_vdpau_common_start_frame(pic_ctx, buffer, size);
  81     return ff_vdpau_add_buffer(pic_ctx, buffer, size);
  82 }
  83
  84 static int vdpau_mpeg4_decode_slice(av_unused AVCodecContext *avctx,
  85                                     av_unused const uint8_t *buffer,
  86                                     av_unused uint32_t size)
  87 {
  88      return 0;
  89 }
  90
  91 static int vdpau_mpeg4_init(AVCodecContext *avctx)
  92 {
  93     VdpDecoderProfile profile;
  94
  95     switch (avctx->profile) {
  96     case FF_PROFILE_MPEG4_SIMPLE:
  97         profile = VDP_DECODER_PROFILE_MPEG4_PART2_SP;
  98         break;
  99     // As any ASP decoder must be able to decode SP, this
 100     // should be a safe fallback if profile is unknown/unspecified.
 101     case FF_PROFILE_UNKNOWN:
 102     case FF_PROFILE_MPEG4_ADVANCED_SIMPLE:
 103         profile = VDP_DECODER_PROFILE_MPEG4_PART2_ASP;
 104         break;
 105     default:
 106         return AVERROR(ENOTSUP);
 107     }
 108
 109     return ff_vdpau_common_init(avctx, profile, avctx->level);
 110 }
 111
 112 AVHWAccel ff_mpeg4_vdpau_hwaccel = {
 113     .name           = "mpeg4_vdpau",
 114     .type           = AVMEDIA_TYPE_VIDEO,
 115     .id             = AV_CODEC_ID_MPEG4,
 116     .pix_fmt        = AV_PIX_FMT_VDPAU,
 117     .start_frame    = vdpau_mpeg4_start_frame,
 118     .end_frame      = ff_vdpau_mpeg_end_frame,
 119     .decode_slice   = vdpau_mpeg4_decode_slice,
 120     .frame_priv_data_size = sizeof(struct vdpau_picture_context),
 121     .init           = vdpau_mpeg4_init,
 122     .uninit         = ff_vdpau_common_uninit,
 123     .priv_data_size = sizeof(VDPAUContext),
 124 };