git.sesse.net Git - ffmpeg/blob - libavcodec/vdpau_mpeg12.c

   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 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_mpeg_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     VdpPictureInfoMPEG1Or2 *info = &hwctx->info.mpeg;
  36     VdpVideoSurface ref;
  37     int i;
  38
  39     /* fill VdpPictureInfoMPEG1Or2 struct */
  40     info->forward_reference  = VDP_INVALID_HANDLE;
  41     info->backward_reference = VDP_INVALID_HANDLE;
  42
  43     switch (s->pict_type) {
  44     case AV_PICTURE_TYPE_B:
  45         ref = ff_vdpau_get_surface_id(&s->next_picture);
  46         assert(ref != VDP_INVALID_HANDLE);
  47         hwctx->info.mpeg.backward_reference = ref;
  48         /* fall through to forward prediction */
  49     case AV_PICTURE_TYPE_P:
  50         ref = ff_vdpau_get_surface_id(&s->last_picture);
  51         hwctx->info.mpeg.forward_reference  = ref;
  52     }
  53
  54     info->slice_count                = 0;
  55     info->picture_structure          = s->picture_structure;
  56     info->picture_coding_type        = s->pict_type;
  57     info->intra_dc_precision         = s->intra_dc_precision;
  58     info->frame_pred_frame_dct       = s->frame_pred_frame_dct;
  59     info->concealment_motion_vectors = s->concealment_motion_vectors;
  60     info->intra_vlc_format           = s->intra_vlc_format;
  61     info->alternate_scan             = s->alternate_scan;
  62     info->q_scale_type               = s->q_scale_type;
  63     info->top_field_first            = s->top_field_first;
  64     // Both for MPEG-1 only, zero for MPEG-2:
  65     info->full_pel_forward_vector    = s->full_pel[0];
  66     info->full_pel_backward_vector   = s->full_pel[1];
  67     // For MPEG-1 fill both horizontal & vertical:
  68     info->f_code[0][0]               = s->mpeg_f_code[0][0];
  69     info->f_code[0][1]               = s->mpeg_f_code[0][1];
  70     info->f_code[1][0]               = s->mpeg_f_code[1][0];
  71     info->f_code[1][1]               = s->mpeg_f_code[1][1];
  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     return ff_vdpau_common_start_frame(avctx, buffer, size);
  78 }
  79
  80 static int vdpau_mpeg_decode_slice(AVCodecContext *avctx,
  81                                    const uint8_t *buffer, uint32_t size)
  82 {
  83     AVVDPAUContext *hwctx = avctx->hwaccel_context;
  84     int val;
  85
  86     val = ff_vdpau_add_buffer(avctx, buffer, size);
  87     if (val < 0)
  88         return val;
  89
  90     hwctx->info.mpeg.slice_count++;
  91     return 0;
  92 }
  93
  94 #if CONFIG_MPEG1_VDPAU_HWACCEL
  95 AVHWAccel ff_mpeg1_vdpau_hwaccel = {
  96     .name           = "mpeg1_vdpau",
  97     .type           = AVMEDIA_TYPE_VIDEO,
  98     .id             = AV_CODEC_ID_MPEG1VIDEO,
  99     .pix_fmt        = AV_PIX_FMT_VDPAU,
 100     .start_frame    = vdpau_mpeg_start_frame,
 101     .end_frame      = ff_vdpau_common_end_frame,
 102     .decode_slice   = vdpau_mpeg_decode_slice,
 103 };
 104 #endif
 105
 106 #if CONFIG_MPEG2_VDPAU_HWACCEL
 107 AVHWAccel ff_mpeg2_vdpau_hwaccel = {
 108     .name           = "mpeg2_vdpau",
 109     .type           = AVMEDIA_TYPE_VIDEO,
 110     .id             = AV_CODEC_ID_MPEG2VIDEO,
 111     .pix_fmt        = AV_PIX_FMT_VDPAU,
 112     .start_frame    = vdpau_mpeg_start_frame,
 113     .end_frame      = ff_vdpau_common_end_frame,
 114     .decode_slice   = vdpau_mpeg_decode_slice,
 115 };
 116 #endif