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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 "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. #if CONFIG_H263_VDPAU_HWACCEL
  92. static int vdpau_h263_init(AVCodecContext *avctx)
  93. {
  94.     return ff_vdpau_common_init(avctx, VDP_DECODER_PROFILE_MPEG4_PART2_ASP,
  95.                                 VDP_DECODER_LEVEL_MPEG4_PART2_ASP_L5);
  96. }
  97.  
  98. AVHWAccel ff_h263_vdpau_hwaccel = {
  99.     .name           = "h263_vdpau",
  100.     .type           = AVMEDIA_TYPE_VIDEO,
  101.     .id             = AV_CODEC_ID_H263,
  102.     .pix_fmt        = AV_PIX_FMT_VDPAU,
  103.     .start_frame    = vdpau_mpeg4_start_frame,
  104.     .end_frame      = ff_vdpau_mpeg_end_frame,
  105.     .decode_slice   = vdpau_mpeg4_decode_slice,
  106.     .frame_priv_data_size = sizeof(struct vdpau_picture_context),
  107.     .init           = vdpau_h263_init,
  108.     .uninit         = ff_vdpau_common_uninit,
  109.     .priv_data_size = sizeof(VDPAUContext),
  110. };
  111. #endif
  112.  
  113. #if CONFIG_MPEG4_VDPAU_HWACCEL
  114. static int vdpau_mpeg4_init(AVCodecContext *avctx)
  115. {
  116.     VdpDecoderProfile profile;
  117.  
  118.     switch (avctx->profile) {
  119.     case FF_PROFILE_MPEG4_SIMPLE:
  120.         profile = VDP_DECODER_PROFILE_MPEG4_PART2_SP;
  121.         break;
  122.     // As any ASP decoder must be able to decode SP, this
  123.     // should be a safe fallback if profile is unknown/unspecified.
  124.     case FF_PROFILE_UNKNOWN:
  125.     case FF_PROFILE_MPEG4_ADVANCED_SIMPLE:
  126.         profile = VDP_DECODER_PROFILE_MPEG4_PART2_ASP;
  127.         break;
  128.     default:
  129.         return AVERROR(ENOTSUP);
  130.     }
  131.  
  132.     return ff_vdpau_common_init(avctx, profile, avctx->level);
  133. }
  134.  
  135. AVHWAccel ff_mpeg4_vdpau_hwaccel = {
  136.     .name           = "mpeg4_vdpau",
  137.     .type           = AVMEDIA_TYPE_VIDEO,
  138.     .id             = AV_CODEC_ID_MPEG4,
  139.     .pix_fmt        = AV_PIX_FMT_VDPAU,
  140.     .start_frame    = vdpau_mpeg4_start_frame,
  141.     .end_frame      = ff_vdpau_mpeg_end_frame,
  142.     .decode_slice   = vdpau_mpeg4_decode_slice,
  143.     .frame_priv_data_size = sizeof(struct vdpau_picture_context),
  144.     .init           = vdpau_mpeg4_init,
  145.     .uninit         = ff_vdpau_common_uninit,
  146.     .priv_data_size = sizeof(VDPAUContext),
  147. };
  148. #endif
  149.