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 Libav.
   8  *
   9  * Libav 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  * Libav 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 Libav; 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 "vdpau.h"
  28 #include "vdpau_internal.h"
  29
  30 static int vdpau_mpeg4_start_frame(AVCodecContext *avctx,
  31                                    const uint8_t *buffer, uint32_t size)
  32 {
  33     MpegEncContext * const s = avctx->priv_data;
  34     AVVDPAUContext *hwctx    = avctx->hwaccel_context;
  35     VdpPictureInfoMPEG4Part2 *info = &hwctx->info.mpeg4;
  36     VdpVideoSurface ref;
  37     int i;
  38
  39     /* fill VdpPictureInfoMPEG4Part2 struct */
  40     info->forward_reference  = VDP_INVALID_HANDLE;
  41     info->backward_reference = VDP_INVALID_HANDLE;
  42     info->vop_coding_type    = 0;
  43
  44     switch (s->pict_type) {
  45     case AV_PICTURE_TYPE_B:
  46         ref = ff_vdpau_get_surface_id(&s->next_picture);
  47         assert(ref != VDP_INVALID_HANDLE);
  48         info->backward_reference = ref;
  49         info->vop_coding_type    = 2;
  50         /* fall-through */
  51     case AV_PICTURE_TYPE_P:
  52         ref = ff_vdpau_get_surface_id(&s->last_picture);
  53         assert(ref != VDP_INVALID_HANDLE);
  54         info->forward_reference  = ref;
  55     }
  56
  57     info->trd[0]                            = s->pp_time;
  58     info->trb[0]                            = s->pb_time;
  59     info->trd[1]                            = s->pp_field_time >> 1;
  60     info->trb[1]                            = s->pb_field_time >> 1;
  61     info->vop_time_increment_resolution     = s->avctx->time_base.den;
  62     info->vop_fcode_forward                 = s->f_code;
  63     info->vop_fcode_backward                = s->b_code;
  64     info->resync_marker_disable             = !s->resync_marker;
  65     info->interlaced                        = !s->progressive_sequence;
  66     info->quant_type                        = s->mpeg_quant;
  67     info->quarter_sample                    = s->quarter_sample;
  68     info->short_video_header                = avctx->codec->id == AV_CODEC_ID_H263;
  69     info->rounding_control                  = s->no_rounding;
  70     info->alternate_vertical_scan_flag      = s->alternate_scan;
  71     info->top_field_first                   = s->top_field_first;
  72     for (i = 0; i < 64; ++i) {
  73         info->intra_quantizer_matrix[i]     = s->intra_matrix[i];
  74         info->non_intra_quantizer_matrix[i] = s->inter_matrix[i];
  75     }
  76
  77     ff_vdpau_common_start_frame(avctx, buffer, size);
  78     return ff_vdpau_add_buffer(avctx, buffer, size);
  79 }
  80
  81 static int vdpau_mpeg4_decode_slice(av_unused AVCodecContext *avctx,
  82                                     av_unused const uint8_t *buffer,
  83                                     av_unused uint32_t size)
  84 {
  85      return 0;
  86 }
  87
  88 #if CONFIG_H263_VDPAU_HWACCEL
  89 AVHWAccel ff_h263_vdpau_hwaccel = {
  90     .name           = "h263_vdpau",
  91     .type           = AVMEDIA_TYPE_VIDEO,
  92     .id             = AV_CODEC_ID_H263,
  93     .pix_fmt        = AV_PIX_FMT_VDPAU,
  94     .start_frame    = vdpau_mpeg4_start_frame,
  95     .end_frame      = ff_vdpau_common_end_frame,
  96     .decode_slice   = vdpau_mpeg4_decode_slice,
  97 };
  98 #endif
  99
 100 #if CONFIG_MPEG4_VDPAU_HWACCEL
 101 AVHWAccel ff_mpeg4_vdpau_hwaccel = {
 102     .name           = "mpeg4_vdpau",
 103     .type           = AVMEDIA_TYPE_VIDEO,
 104     .id             = AV_CODEC_ID_MPEG4,
 105     .pix_fmt        = AV_PIX_FMT_VDPAU,
 106     .start_frame    = vdpau_mpeg4_start_frame,
 107     .end_frame      = ff_vdpau_common_end_frame,
 108     .decode_slice   = vdpau_mpeg4_decode_slice,
 109 };
 110 #endif