57df86728fac8ef60598bf1845dfea06d3cc4047
[libav.git] / libavcodec / vdpau_mpeg4.c
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 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 "mpeg4video.h"
28 #include "vdpau.h"
29 #include "vdpau_internal.h"
30
31 static int vdpau_mpeg4_start_frame(AVCodecContext *avctx,
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:
49 ref = ff_vdpau_get_surface_id(s->next_picture.f);
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:
55 ref = ff_vdpau_get_surface_id(s->last_picture.f);
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->time_base.den;
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
84 static int vdpau_mpeg4_decode_slice(av_unused AVCodecContext *avctx,
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 AVHWAccel ff_h263_vdpau_hwaccel = {
93 .name = "h263_vdpau",
94 .type = AVMEDIA_TYPE_VIDEO,
95 .id = AV_CODEC_ID_H263,
96 .pix_fmt = AV_PIX_FMT_VDPAU,
97 .start_frame = vdpau_mpeg4_start_frame,
98 .end_frame = ff_vdpau_mpeg_end_frame,
99 .decode_slice = vdpau_mpeg4_decode_slice,
100 .priv_data_size = sizeof(struct vdpau_picture_context),
101 };
102 #endif
103
104 #if CONFIG_MPEG4_VDPAU_HWACCEL
105 AVHWAccel ff_mpeg4_vdpau_hwaccel = {
106 .name = "mpeg4_vdpau",
107 .type = AVMEDIA_TYPE_VIDEO,
108 .id = AV_CODEC_ID_MPEG4,
109 .pix_fmt = AV_PIX_FMT_VDPAU,
110 .start_frame = vdpau_mpeg4_start_frame,
111 .end_frame = ff_vdpau_mpeg_end_frame,
112 .decode_slice = vdpau_mpeg4_decode_slice,
113 .priv_data_size = sizeof(struct vdpau_picture_context),
114 };
115 #endif