1b0ef76a7bc987220d28fad62bd74ad854cb96d3
[ffmpeg.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 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
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