FFmpeg
 All Data Structures Namespaces Files Functions Variables Typedefs Enumerations Enumerator Macros Groups Pages
vdpau_mpeg4.c
Go to the documentation of this file.
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 "mpeg4video.h"
28 #include "vdpau.h"
29 #include "vdpau_internal.h"
30 
32  const uint8_t *buffer, uint32_t size)
33 {
34  Mpeg4DecContext *ctx = avctx->priv_data;
35  MpegEncContext * const s = &ctx->m;
36  Picture *pic = s->current_picture_ptr;
37  struct vdpau_picture_context *pic_ctx = pic->hwaccel_picture_private;
38  VdpPictureInfoMPEG4Part2 *info = &pic_ctx->info.mpeg4;
39  VdpVideoSurface ref;
40  int i;
41 
42  /* fill VdpPictureInfoMPEG4Part2 struct */
43  info->forward_reference = VDP_INVALID_HANDLE;
44  info->backward_reference = VDP_INVALID_HANDLE;
45  info->vop_coding_type = 0;
46 
47  switch (s->pict_type) {
48  case AV_PICTURE_TYPE_B:
50  assert(ref != VDP_INVALID_HANDLE);
51  info->backward_reference = ref;
52  info->vop_coding_type = 2;
53  /* fall-through */
54  case AV_PICTURE_TYPE_P:
56  assert(ref != VDP_INVALID_HANDLE);
57  info->forward_reference = ref;
58  }
59 
60  info->trd[0] = s->pp_time;
61  info->trb[0] = s->pb_time;
62  info->trd[1] = s->pp_field_time >> 1;
63  info->trb[1] = s->pb_field_time >> 1;
64  info->vop_time_increment_resolution = s->avctx->framerate.num;
65  info->vop_fcode_forward = s->f_code;
66  info->vop_fcode_backward = s->b_code;
67  info->resync_marker_disable = !ctx->resync_marker;
68  info->interlaced = !s->progressive_sequence;
69  info->quant_type = s->mpeg_quant;
70  info->quarter_sample = s->quarter_sample;
71  info->short_video_header = avctx->codec->id == AV_CODEC_ID_H263;
72  info->rounding_control = s->no_rounding;
73  info->alternate_vertical_scan_flag = s->alternate_scan;
74  info->top_field_first = s->top_field_first;
75  for (i = 0; i < 64; ++i) {
76  info->intra_quantizer_matrix[i] = s->intra_matrix[i];
77  info->non_intra_quantizer_matrix[i] = s->inter_matrix[i];
78  }
79 
80  ff_vdpau_common_start_frame(pic_ctx, buffer, size);
81  return ff_vdpau_add_buffer(pic_ctx, buffer, size);
82 }
83 
85  av_unused const uint8_t *buffer,
86  av_unused uint32_t size)
87 {
88  return 0;
89 }
90 
91 #if CONFIG_H263_VDPAU_HWACCEL
92 static int vdpau_h263_init(AVCodecContext *avctx)
93 {
94  return ff_vdpau_common_init(avctx, VDP_DECODER_PROFILE_MPEG4_PART2_ASP,
95  VDP_DECODER_LEVEL_MPEG4_PART2_ASP_L5);
96 }
97 
98 AVHWAccel ff_h263_vdpau_hwaccel = {
99  .name = "h263_vdpau",
100  .type = AVMEDIA_TYPE_VIDEO,
101  .id = AV_CODEC_ID_H263,
102  .pix_fmt = AV_PIX_FMT_VDPAU,
103  .start_frame = vdpau_mpeg4_start_frame,
104  .end_frame = ff_vdpau_mpeg_end_frame,
105  .decode_slice = vdpau_mpeg4_decode_slice,
106  .frame_priv_data_size = sizeof(struct vdpau_picture_context),
107  .init = vdpau_h263_init,
108  .uninit = ff_vdpau_common_uninit,
109  .priv_data_size = sizeof(VDPAUContext),
110 };
111 #endif
112 
113 #if CONFIG_MPEG4_VDPAU_HWACCEL
114 static int vdpau_mpeg4_init(AVCodecContext *avctx)
115 {
116  VdpDecoderProfile profile;
117 
118  switch (avctx->profile) {
120  profile = VDP_DECODER_PROFILE_MPEG4_PART2_SP;
121  break;
123  profile = VDP_DECODER_PROFILE_MPEG4_PART2_ASP;
124  break;
125  default:
126  return AVERROR(ENOTSUP);
127  }
128 
129  return ff_vdpau_common_init(avctx, profile, avctx->level);
130 }
131 
132 AVHWAccel ff_mpeg4_vdpau_hwaccel = {
133  .name = "mpeg4_vdpau",
134  .type = AVMEDIA_TYPE_VIDEO,
135  .id = AV_CODEC_ID_MPEG4,
136  .pix_fmt = AV_PIX_FMT_VDPAU,
137  .start_frame = vdpau_mpeg4_start_frame,
138  .end_frame = ff_vdpau_mpeg_end_frame,
139  .decode_slice = vdpau_mpeg4_decode_slice,
140  .frame_priv_data_size = sizeof(struct vdpau_picture_context),
141  .init = vdpau_mpeg4_init,
142  .uninit = ff_vdpau_common_uninit,
143  .priv_data_size = sizeof(VDPAUContext),
144 };
145 #endif