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  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 "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.     Picture *pic             = s->current_picture_ptr;
  35.     struct vdpau_picture_context *pic_ctx = pic->hwaccel_picture_private;
  36.     VdpPictureInfoMPEG4Part2 *info = &pic_ctx->info.mpeg4;
  37.     VdpVideoSurface ref;
  38.     int i;
  39.  
  40.     /* fill VdpPictureInfoMPEG4Part2 struct */
  41.     info->forward_reference  = VDP_INVALID_HANDLE;
  42.     info->backward_reference = VDP_INVALID_HANDLE;
  43.     info->vop_coding_type    = 0;
  44.  
  45.     switch (s->pict_type) {
  46.     case AV_PICTURE_TYPE_B:
  47.         ref = ff_vdpau_get_surface_id(&s->next_picture);
  48.         assert(ref != VDP_INVALID_HANDLE);
  49.         info->backward_reference = ref;
  50.         info->vop_coding_type    = 2;
  51.         /* fall-through */
  52.     case AV_PICTURE_TYPE_P:
  53.         ref = ff_vdpau_get_surface_id(&s->last_picture);
  54.         assert(ref != VDP_INVALID_HANDLE);
  55.         info->forward_reference  = ref;
  56.     }
  57.  
  58.     info->trd[0]                            = s->pp_time;
  59.     info->trb[0]                            = s->pb_time;
  60.     info->trd[1]                            = s->pp_field_time >> 1;
  61.     info->trb[1]                            = s->pb_field_time >> 1;
  62.     info->vop_time_increment_resolution     = s->avctx->time_base.den;
  63.     info->vop_fcode_forward                 = s->f_code;
  64.     info->vop_fcode_backward                = s->b_code;
  65.     info->resync_marker_disable             = !s->resync_marker;
  66.     info->interlaced                        = !s->progressive_sequence;
  67.     info->quant_type                        = s->mpeg_quant;
  68.     info->quarter_sample                    = s->quarter_sample;
  69.     info->short_video_header                = avctx->codec->id == AV_CODEC_ID_H263;
  70.     info->rounding_control                  = s->no_rounding;
  71.     info->alternate_vertical_scan_flag      = s->alternate_scan;
  72.     info->top_field_first                   = s->top_field_first;
  73.     for (i = 0; i < 64; ++i) {
  74.         info->intra_quantizer_matrix[i]     = s->intra_matrix[i];
  75.         info->non_intra_quantizer_matrix[i] = s->inter_matrix[i];
  76.     }
  77.  
  78.     ff_vdpau_common_start_frame(pic, buffer, size);
  79.     return ff_vdpau_add_buffer(pic, buffer, size);
  80. }
  81.  
  82. static int vdpau_mpeg4_decode_slice(av_unused AVCodecContext *avctx,
  83.                                     av_unused const uint8_t *buffer,
  84.                                     av_unused uint32_t size)
  85. {
  86.      return 0;
  87. }
  88.  
  89. #if CONFIG_H263_VDPAU_HWACCEL
  90. AVHWAccel ff_h263_vdpau_hwaccel = {
  91.     .name           = "h263_vdpau",
  92.     .type           = AVMEDIA_TYPE_VIDEO,
  93.     .id             = AV_CODEC_ID_H263,
  94.     .pix_fmt        = AV_PIX_FMT_VDPAU,
  95.     .start_frame    = vdpau_mpeg4_start_frame,
  96.     .end_frame      = ff_vdpau_mpeg_end_frame,
  97.     .decode_slice   = vdpau_mpeg4_decode_slice,
  98.     .priv_data_size = sizeof(struct vdpau_picture_context),
  99. };
  100. #endif
  101.  
  102. #if CONFIG_MPEG4_VDPAU_HWACCEL
  103. AVHWAccel ff_mpeg4_vdpau_hwaccel = {
  104.     .name           = "mpeg4_vdpau",
  105.     .type           = AVMEDIA_TYPE_VIDEO,
  106.     .id             = AV_CODEC_ID_MPEG4,
  107.     .pix_fmt        = AV_PIX_FMT_VDPAU,
  108.     .start_frame    = vdpau_mpeg4_start_frame,
  109.     .end_frame      = ff_vdpau_mpeg_end_frame,
  110.     .decode_slice   = vdpau_mpeg4_decode_slice,
  111.     .priv_data_size = sizeof(struct vdpau_picture_context),
  112. };
  113. #endif
  114.