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     Picture *pic             = s->current_picture_ptr;
  35     struct vdpau_picture_context *pic_ctx = pic->hwaccel_picture_private;
  36     VdpPictureInfoMPEG1Or2 *info = &pic_ctx->info.mpeg;
  37     VdpVideoSurface ref;
  38     int i;
  39
  40     /* fill VdpPictureInfoMPEG1Or2 struct */
  41     info->forward_reference  = VDP_INVALID_HANDLE;
  42     info->backward_reference = VDP_INVALID_HANDLE;
  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         /* fall through to forward prediction */
  50     case AV_PICTURE_TYPE_P:
  51         ref = ff_vdpau_get_surface_id(&s->last_picture);
  52         info->forward_reference  = ref;
  53     }
  54
  55     info->slice_count                = 0;
  56     info->picture_structure          = s->picture_structure;
  57     info->picture_coding_type        = s->pict_type;
  58     info->intra_dc_precision         = s->intra_dc_precision;
  59     info->frame_pred_frame_dct       = s->frame_pred_frame_dct;
  60     info->concealment_motion_vectors = s->concealment_motion_vectors;
  61     info->intra_vlc_format           = s->intra_vlc_format;
  62     info->alternate_scan             = s->alternate_scan;
  63     info->q_scale_type               = s->q_scale_type;
  64     info->top_field_first            = s->top_field_first;
  65     // Both for MPEG-1 only, zero for MPEG-2:
  66     info->full_pel_forward_vector    = s->full_pel[0];
  67     info->full_pel_backward_vector   = s->full_pel[1];
  68     // For MPEG-1 fill both horizontal & vertical:
  69     info->f_code[0][0]               = s->mpeg_f_code[0][0];
  70     info->f_code[0][1]               = s->mpeg_f_code[0][1];
  71     info->f_code[1][0]               = s->mpeg_f_code[1][0];
  72     info->f_code[1][1]               = s->mpeg_f_code[1][1];
  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     return ff_vdpau_common_start_frame(pic, buffer, size);
  79 }
  80
  81 static int vdpau_mpeg_decode_slice(AVCodecContext *avctx,
  82                                    const uint8_t *buffer, uint32_t size)
  83 {
  84     MpegEncContext * const s = avctx->priv_data;
  85     Picture *pic             = s->current_picture_ptr;
  86     struct vdpau_picture_context *pic_ctx = pic->hwaccel_picture_private;
  87     int val;
  88
  89     val = ff_vdpau_add_buffer(pic, buffer, size);
  90     if (val < 0)
  91         return val;
  92
  93     pic_ctx->info.mpeg.slice_count++;
  94     return 0;
  95 }
  96
  97 #if CONFIG_MPEG1_VDPAU_HWACCEL
  98 AVHWAccel ff_mpeg1_vdpau_hwaccel = {
  99     .name           = "mpeg1_vdpau",
 100     .type           = AVMEDIA_TYPE_VIDEO,
 101     .id             = AV_CODEC_ID_MPEG1VIDEO,
 102     .pix_fmt        = AV_PIX_FMT_VDPAU,
 103     .start_frame    = vdpau_mpeg_start_frame,
 104     .end_frame      = ff_vdpau_mpeg_end_frame,
 105     .decode_slice   = vdpau_mpeg_decode_slice,
 106     .priv_data_size = sizeof(struct vdpau_picture_context),
 107 };
 108 #endif
 109
 110 #if CONFIG_MPEG2_VDPAU_HWACCEL
 111 AVHWAccel ff_mpeg2_vdpau_hwaccel = {
 112     .name           = "mpeg2_vdpau",
 113     .type           = AVMEDIA_TYPE_VIDEO,
 114     .id             = AV_CODEC_ID_MPEG2VIDEO,
 115     .pix_fmt        = AV_PIX_FMT_VDPAU,
 116     .start_frame    = vdpau_mpeg_start_frame,
 117     .end_frame      = ff_vdpau_mpeg_end_frame,
 118     .decode_slice   = vdpau_mpeg_decode_slice,
 119     .priv_data_size = sizeof(struct vdpau_picture_context),
 120 };
 121 #endif