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  1. /*
  2.  * MPEG-1/2 HW 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 "mpegvideo.h"
  28. #include "vdpau.h"
  29. #include "vdpau_internal.h"
  30.  
  31. static int vdpau_mpeg_start_frame(AVCodecContext *avctx,
  32.                                   const uint8_t *buffer, uint32_t size)
  33. {
  34.     MpegEncContext * const s = avctx->priv_data;
  35.     Picture *pic             = s->current_picture_ptr;
  36.     struct vdpau_picture_context *pic_ctx = pic->hwaccel_picture_private;
  37.     VdpPictureInfoMPEG1Or2 *info = &pic_ctx->info.mpeg;
  38.     VdpVideoSurface ref;
  39.     int i;
  40.  
  41.     /* fill VdpPictureInfoMPEG1Or2 struct */
  42.     info->forward_reference  = VDP_INVALID_HANDLE;
  43.     info->backward_reference = VDP_INVALID_HANDLE;
  44.  
  45.     switch (s->pict_type) {
  46.     case AV_PICTURE_TYPE_B:
  47.         ref = ff_vdpau_get_surface_id(s->next_picture.f);
  48.         assert(ref != VDP_INVALID_HANDLE);
  49.         info->backward_reference = ref;
  50.         /* fall through to forward prediction */
  51.     case AV_PICTURE_TYPE_P:
  52.         ref = ff_vdpau_get_surface_id(s->last_picture.f);
  53.         info->forward_reference  = ref;
  54.     }
  55.  
  56.     info->slice_count                = 0;
  57.     info->picture_structure          = s->picture_structure;
  58.     info->picture_coding_type        = s->pict_type;
  59.     info->intra_dc_precision         = s->intra_dc_precision;
  60.     info->frame_pred_frame_dct       = s->frame_pred_frame_dct;
  61.     info->concealment_motion_vectors = s->concealment_motion_vectors;
  62.     info->intra_vlc_format           = s->intra_vlc_format;
  63.     info->alternate_scan             = s->alternate_scan;
  64.     info->q_scale_type               = s->q_scale_type;
  65.     info->top_field_first            = s->top_field_first;
  66.     // Both for MPEG-1 only, zero for MPEG-2:
  67.     info->full_pel_forward_vector    = s->full_pel[0];
  68.     info->full_pel_backward_vector   = s->full_pel[1];
  69.     // For MPEG-1 fill both horizontal & vertical:
  70.     info->f_code[0][0]               = s->mpeg_f_code[0][0];
  71.     info->f_code[0][1]               = s->mpeg_f_code[0][1];
  72.     info->f_code[1][0]               = s->mpeg_f_code[1][0];
  73.     info->f_code[1][1]               = s->mpeg_f_code[1][1];
  74.     for (i = 0; i < 64; ++i) {
  75.         info->intra_quantizer_matrix[i]     = s->intra_matrix[i];
  76.         info->non_intra_quantizer_matrix[i] = s->inter_matrix[i];
  77.     }
  78.  
  79.     return ff_vdpau_common_start_frame(pic_ctx, buffer, size);
  80. }
  81.  
  82. static int vdpau_mpeg_decode_slice(AVCodecContext *avctx,
  83.                                    const uint8_t *buffer, uint32_t size)
  84. {
  85.     MpegEncContext * const s = avctx->priv_data;
  86.     Picture *pic             = s->current_picture_ptr;
  87.     struct vdpau_picture_context *pic_ctx = pic->hwaccel_picture_private;
  88.     int val;
  89.  
  90.     val = ff_vdpau_add_buffer(pic_ctx, buffer, size);
  91.     if (val < 0)
  92.         return val;
  93.  
  94.     pic_ctx->info.mpeg.slice_count++;
  95.     return 0;
  96. }
  97.  
  98. #if CONFIG_MPEG1_VDPAU_HWACCEL
  99. static int vdpau_mpeg1_init(AVCodecContext *avctx)
  100. {
  101.     return ff_vdpau_common_init(avctx, VDP_DECODER_PROFILE_MPEG1,
  102.                                 VDP_DECODER_LEVEL_MPEG1_NA);
  103. }
  104.  
  105. AVHWAccel ff_mpeg1_vdpau_hwaccel = {
  106.     .name           = "mpeg1_vdpau",
  107.     .type           = AVMEDIA_TYPE_VIDEO,
  108.     .id             = AV_CODEC_ID_MPEG1VIDEO,
  109.     .pix_fmt        = AV_PIX_FMT_VDPAU,
  110.     .start_frame    = vdpau_mpeg_start_frame,
  111.     .end_frame      = ff_vdpau_mpeg_end_frame,
  112.     .decode_slice   = vdpau_mpeg_decode_slice,
  113.     .frame_priv_data_size = sizeof(struct vdpau_picture_context),
  114.     .init           = vdpau_mpeg1_init,
  115.     .uninit         = ff_vdpau_common_uninit,
  116.     .priv_data_size = sizeof(VDPAUContext),
  117. };
  118. #endif
  119.  
  120. #if CONFIG_MPEG2_VDPAU_HWACCEL
  121. static int vdpau_mpeg2_init(AVCodecContext *avctx)
  122. {
  123.     VdpDecoderProfile profile;
  124.  
  125.     switch (avctx->profile) {
  126.     case FF_PROFILE_MPEG2_MAIN:
  127.         profile = VDP_DECODER_PROFILE_MPEG2_MAIN;
  128.         break;
  129.     case FF_PROFILE_MPEG2_SIMPLE:
  130.         profile = VDP_DECODER_PROFILE_MPEG2_SIMPLE;
  131.         break;
  132.     default:
  133.         return AVERROR(EINVAL);
  134.     }
  135.  
  136.     return ff_vdpau_common_init(avctx, profile, VDP_DECODER_LEVEL_MPEG2_HL);
  137. }
  138.  
  139. AVHWAccel ff_mpeg2_vdpau_hwaccel = {
  140.     .name           = "mpeg2_vdpau",
  141.     .type           = AVMEDIA_TYPE_VIDEO,
  142.     .id             = AV_CODEC_ID_MPEG2VIDEO,
  143.     .pix_fmt        = AV_PIX_FMT_VDPAU,
  144.     .start_frame    = vdpau_mpeg_start_frame,
  145.     .end_frame      = ff_vdpau_mpeg_end_frame,
  146.     .decode_slice   = vdpau_mpeg_decode_slice,
  147.     .frame_priv_data_size = sizeof(struct vdpau_picture_context),
  148.     .init           = vdpau_mpeg2_init,
  149.     .uninit         = ff_vdpau_common_uninit,
  150.     .priv_data_size = sizeof(VDPAUContext),
  151. };
  152. #endif
  153.