path: root/libavcodec/mpeg_er.c (plain)
blob: ee8b2a5e7b58ef11f4412f5993e33ee2081e3463

1	/*
2	* This file is part of FFmpeg.
3	*
4	* FFmpeg is free software; you can redistribute it and/or
5	* modify it under the terms of the GNU Lesser General Public
6	* License as published by the Free Software Foundation; either
7	* version 2.1 of the License, or (at your option) any later version.
8	*
9	* FFmpeg is distributed in the hope that it will be useful,
10	* but WITHOUT ANY WARRANTY; without even the implied warranty of
11	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12	* Lesser General Public License for more details.
13	*
14	* You should have received a copy of the GNU Lesser General Public
15	* License along with FFmpeg; if not, write to the Free Software
16	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17	*/
18
19	#include "error_resilience.h"
20	#include "mpegvideo.h"
21	#include "mpeg_er.h"
22
23	static void set_erpic(ERPicture *dst, Picture *src)
24	{
25	int i;
26
27	memset(dst, 0, sizeof(*dst));
28	if (!src) {
29	dst->f = NULL;
30	dst->tf = NULL;
31	return;
32	}
33
34	dst->f = src->f;
35	dst->tf = &src->tf;
36
37	for (i = 0; i < 2; i++) {
38	dst->motion_val[i] = src->motion_val[i];
39	dst->ref_index[i] = src->ref_index[i];
40	}
41
42	dst->mb_type = src->mb_type;
43	dst->field_picture = src->field_picture;
44	}
45
46	void ff_mpeg_er_frame_start(MpegEncContext *s)
47	{
48	ERContext *er = &s->er;
49
50	set_erpic(&er->cur_pic, s->current_picture_ptr);
51	set_erpic(&er->next_pic, s->next_picture_ptr);
52	set_erpic(&er->last_pic, s->last_picture_ptr);
53
54	er->pp_time = s->pp_time;
55	er->pb_time = s->pb_time;
56	er->quarter_sample = s->quarter_sample;
57	er->partitioned_frame = s->partitioned_frame;
58
59	ff_er_frame_start(er);
60	}
61
62	static void mpeg_er_decode_mb(void *opaque, int ref, int mv_dir, int mv_type,
63	int (*mv)[2][4][2], int mb_x, int mb_y,
64	int mb_intra, int mb_skipped)
65	{
66	MpegEncContext *s = opaque;
67
68	s->mv_dir = mv_dir;
69	s->mv_type = mv_type;
70	s->mb_intra = mb_intra;
71	s->mb_skipped = mb_skipped;
72	s->mb_x = mb_x;
73	s->mb_y = mb_y;
74	memcpy(s->mv, mv, sizeof(*mv));
75
76	ff_init_block_index(s);
77	ff_update_block_index(s);
78
79	s->bdsp.clear_blocks(s->block[0]);
80
81	s->dest[0] = s->current_picture.f->data[0] +
82	s->mb_y * 16 * s->linesize +
83	s->mb_x * 16;
84	s->dest[1] = s->current_picture.f->data[1] +
85	s->mb_y * (16 >> s->chroma_y_shift) * s->uvlinesize +
86	s->mb_x * (16 >> s->chroma_x_shift);
87	s->dest[2] = s->current_picture.f->data[2] +
88	s->mb_y * (16 >> s->chroma_y_shift) * s->uvlinesize +
89	s->mb_x * (16 >> s->chroma_x_shift);
90
91	if (ref)
92	av_log(s->avctx, AV_LOG_DEBUG,
93	"Interlaced error concealment is not fully implemented\n");
94	ff_mpv_decode_mb(s, s->block);
95	}
96
97	int ff_mpeg_er_init(MpegEncContext *s)
98	{
99	ERContext *er = &s->er;
100	int mb_array_size = s->mb_height * s->mb_stride;
101	int i;
102
103	er->avctx = s->avctx;
104
105	er->mb_index2xy = s->mb_index2xy;
106	er->mb_num = s->mb_num;
107	er->mb_width = s->mb_width;
108	er->mb_height = s->mb_height;
109	er->mb_stride = s->mb_stride;
110	er->b8_stride = s->b8_stride;
111
112	er->er_temp_buffer = av_malloc(s->mb_height * s->mb_stride * (4*sizeof(int) + 1));
113	er->error_status_table = av_mallocz(mb_array_size);
114	if (!er->er_temp_buffer || !er->error_status_table)
115	goto fail;
116
117	er->mbskip_table = s->mbskip_table;
118	er->mbintra_table = s->mbintra_table;
119
120	for (i = 0; i < FF_ARRAY_ELEMS(s->dc_val); i++)
121	er->dc_val[i] = s->dc_val[i];
122
123	er->decode_mb = mpeg_er_decode_mb;
124	er->opaque = s;
125
126	return 0;
127	fail:
128	av_freep(&er->er_temp_buffer);
129	av_freep(&er->error_status_table);
130	return AVERROR(ENOMEM);
131	}
132