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vdpau_mpeg12.c
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1 /*
2  * MPEG-1/2 HW decode acceleration through VDPAU
3  *
4  * Copyright (c) 2008 NVIDIA
5  * Copyright (c) 2013 RĂ©mi 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 
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:
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:
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 
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,
99  .pix_fmt = AV_PIX_FMT_VDPAU,
100  .start_frame = vdpau_mpeg_start_frame,
101  .end_frame = ff_vdpau_mpeg_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,
111  .pix_fmt = AV_PIX_FMT_VDPAU,
112  .start_frame = vdpau_mpeg_start_frame,
113  .end_frame = ff_vdpau_mpeg_end_frame,
114  .decode_slice = vdpau_mpeg_decode_slice,
115 };
116 #endif