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vdpau_mpeg4.c
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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 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  VdpPictureInfoMPEG4Part2 *info = &hwctx->info.mpeg4;
36  VdpVideoSurface ref;
37  int i;
38 
39  /* fill VdpPictureInfoMPEG4Part2 struct */
40  info->forward_reference = VDP_INVALID_HANDLE;
41  info->backward_reference = VDP_INVALID_HANDLE;
42  info->vop_coding_type = 0;
43 
44  switch (s->pict_type) {
45  case AV_PICTURE_TYPE_B:
47  assert(ref != VDP_INVALID_HANDLE);
48  info->backward_reference = ref;
49  info->vop_coding_type = 2;
50  /* fall-through */
51  case AV_PICTURE_TYPE_P:
53  assert(ref != VDP_INVALID_HANDLE);
54  info->forward_reference = ref;
55  }
56 
57  info->trd[0] = s->pp_time;
58  info->trb[0] = s->pb_time;
59  info->trd[1] = s->pp_field_time >> 1;
60  info->trb[1] = s->pb_field_time >> 1;
61  info->vop_time_increment_resolution = s->avctx->time_base.den;
62  info->vop_fcode_forward = s->f_code;
63  info->vop_fcode_backward = s->b_code;
64  info->resync_marker_disable = !s->resync_marker;
65  info->interlaced = !s->progressive_sequence;
66  info->quant_type = s->mpeg_quant;
67  info->quarter_sample = s->quarter_sample;
68  info->short_video_header = avctx->codec->id == AV_CODEC_ID_H263;
69  info->rounding_control = s->no_rounding;
70  info->alternate_vertical_scan_flag = s->alternate_scan;
71  info->top_field_first = s->top_field_first;
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  ff_vdpau_common_start_frame(avctx, buffer, size);
78  return ff_vdpau_add_buffer(avctx, buffer, size);
79 }
80 
82  av_unused const uint8_t *buffer,
83  av_unused uint32_t size)
84 {
85  return 0;
86 }
87 
88 #if CONFIG_H263_VDPAU_HWACCEL
89 AVHWAccel ff_h263_vdpau_hwaccel = {
90  .name = "h263_vdpau",
91  .type = AVMEDIA_TYPE_VIDEO,
92  .id = AV_CODEC_ID_H263,
93  .pix_fmt = AV_PIX_FMT_VDPAU,
94  .start_frame = vdpau_mpeg4_start_frame,
95  .end_frame = ff_vdpau_mpeg_end_frame,
96  .decode_slice = vdpau_mpeg4_decode_slice,
97 };
98 #endif
99 
100 #if CONFIG_MPEG4_VDPAU_HWACCEL
101 AVHWAccel ff_mpeg4_vdpau_hwaccel = {
102  .name = "mpeg4_vdpau",
103  .type = AVMEDIA_TYPE_VIDEO,
104  .id = AV_CODEC_ID_MPEG4,
105  .pix_fmt = AV_PIX_FMT_VDPAU,
106  .start_frame = vdpau_mpeg4_start_frame,
107  .end_frame = ff_vdpau_mpeg_end_frame,
108  .decode_slice = vdpau_mpeg4_decode_slice,
109 };
110 #endif