2 * MPEG-1/2 HW decode acceleration through VDPAU
4 * Copyright (c) 2008 NVIDIA
5 * Copyright (c) 2013 RĂ©mi Denis-Courmont
7 * This file is part of FFmpeg.
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.
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.
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
24 #include <vdpau/vdpau.h>
28 #include "vdpau_internal.h"
30 static int vdpau_mpeg_start_frame(AVCodecContext *avctx,
31 const uint8_t *buffer, uint32_t size)
33 MpegEncContext * const s = avctx->priv_data;
34 Picture *pic = s->current_picture_ptr;
35 struct vdpau_picture_context *pic_ctx = pic->hwaccel_picture_private;
36 VdpPictureInfoMPEG1Or2 *info = &pic_ctx->info.mpeg;
40 /* fill VdpPictureInfoMPEG1Or2 struct */
41 info->forward_reference = VDP_INVALID_HANDLE;
42 info->backward_reference = VDP_INVALID_HANDLE;
44 switch (s->pict_type) {
45 case AV_PICTURE_TYPE_B:
46 ref = ff_vdpau_get_surface_id(s->next_picture.f);
47 assert(ref != VDP_INVALID_HANDLE);
48 info->backward_reference = ref;
49 /* fall through to forward prediction */
50 case AV_PICTURE_TYPE_P:
51 ref = ff_vdpau_get_surface_id(s->last_picture.f);
52 info->forward_reference = ref;
55 info->slice_count = 0;
56 info->picture_structure = s->picture_structure;
57 info->picture_coding_type = s->pict_type;
58 info->intra_dc_precision = s->intra_dc_precision;
59 info->frame_pred_frame_dct = s->frame_pred_frame_dct;
60 info->concealment_motion_vectors = s->concealment_motion_vectors;
61 info->intra_vlc_format = s->intra_vlc_format;
62 info->alternate_scan = s->alternate_scan;
63 info->q_scale_type = s->q_scale_type;
64 info->top_field_first = s->top_field_first;
65 // Both for MPEG-1 only, zero for MPEG-2:
66 info->full_pel_forward_vector = s->full_pel[0];
67 info->full_pel_backward_vector = s->full_pel[1];
68 // For MPEG-1 fill both horizontal & vertical:
69 info->f_code[0][0] = s->mpeg_f_code[0][0];
70 info->f_code[0][1] = s->mpeg_f_code[0][1];
71 info->f_code[1][0] = s->mpeg_f_code[1][0];
72 info->f_code[1][1] = s->mpeg_f_code[1][1];
73 for (i = 0; i < 64; ++i) {
74 info->intra_quantizer_matrix[i] = s->intra_matrix[i];
75 info->non_intra_quantizer_matrix[i] = s->inter_matrix[i];
78 return ff_vdpau_common_start_frame(pic_ctx, buffer, size);
81 static int vdpau_mpeg_decode_slice(AVCodecContext *avctx,
82 const uint8_t *buffer, uint32_t size)
84 MpegEncContext * const s = avctx->priv_data;
85 Picture *pic = s->current_picture_ptr;
86 struct vdpau_picture_context *pic_ctx = pic->hwaccel_picture_private;
89 val = ff_vdpau_add_buffer(pic_ctx, buffer, size);
93 pic_ctx->info.mpeg.slice_count++;
97 #if CONFIG_MPEG1_VDPAU_HWACCEL
98 AVHWAccel ff_mpeg1_vdpau_hwaccel = {
99 .name = "mpeg1_vdpau",
100 .type = AVMEDIA_TYPE_VIDEO,
101 .id = AV_CODEC_ID_MPEG1VIDEO,
102 .pix_fmt = AV_PIX_FMT_VDPAU,
103 .start_frame = vdpau_mpeg_start_frame,
104 .end_frame = ff_vdpau_mpeg_end_frame,
105 .decode_slice = vdpau_mpeg_decode_slice,
106 .priv_data_size = sizeof(struct vdpau_picture_context),
110 #if CONFIG_MPEG2_VDPAU_HWACCEL
111 AVHWAccel ff_mpeg2_vdpau_hwaccel = {
112 .name = "mpeg2_vdpau",
113 .type = AVMEDIA_TYPE_VIDEO,
114 .id = AV_CODEC_ID_MPEG2VIDEO,
115 .pix_fmt = AV_PIX_FMT_VDPAU,
116 .start_frame = vdpau_mpeg_start_frame,
117 .end_frame = ff_vdpau_mpeg_end_frame,
118 .decode_slice = vdpau_mpeg_decode_slice,
119 .priv_data_size = sizeof(struct vdpau_picture_context),