1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
|
/*
* Copyright (c) 2016, Alliance for Open Media. All rights reserved
*
* This source code is subject to the terms of the BSD 2 Clause License and
* the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
* was not distributed with this source code in the LICENSE file, you can
* obtain it at www.aomedia.org/license/software. If the Alliance for Open
* Media Patent License 1.0 was not distributed with this source code in the
* PATENTS file, you can obtain it at www.aomedia.org/license/patent.
*/
#include <assert.h>
#include "aom_mem/aom_mem.h"
#include "aom_ports/mem.h"
#include "aom_scale/yv12config.h"
/****************************************************************************
* Exports
****************************************************************************/
/****************************************************************************
*
****************************************************************************/
#define yv12_align_addr(addr, align) \
(void *)(((size_t)(addr) + ((align)-1)) & (size_t) - (align))
// TODO(jkoleszar): Maybe replace this with struct aom_image
int aom_free_frame_buffer(YV12_BUFFER_CONFIG *ybf) {
if (ybf) {
if (ybf->buffer_alloc_sz > 0) {
aom_free(ybf->buffer_alloc);
}
if (ybf->y_buffer_8bit) aom_free(ybf->y_buffer_8bit);
/* buffer_alloc isn't accessed by most functions. Rather y_buffer,
u_buffer and v_buffer point to buffer_alloc and are used. Clear out
all of this so that a freed pointer isn't inadvertently used */
memset(ybf, 0, sizeof(YV12_BUFFER_CONFIG));
} else {
return -1;
}
return 0;
}
int aom_realloc_frame_buffer(YV12_BUFFER_CONFIG *ybf, int width, int height,
int ss_x, int ss_y, int use_highbitdepth,
int border, int byte_alignment,
aom_codec_frame_buffer_t *fb,
aom_get_frame_buffer_cb_fn_t cb, void *cb_priv) {
if (ybf) {
#if CONFIG_SIZE_LIMIT
if (width > DECODE_WIDTH_LIMIT || height > DECODE_HEIGHT_LIMIT) return -1;
#endif
const int aom_byte_align = (byte_alignment == 0) ? 1 : byte_alignment;
const int aligned_width = (width + 7) & ~7;
const int aligned_height = (height + 7) & ~7;
const int y_stride = ((aligned_width + 2 * border) + 31) & ~31;
const uint64_t yplane_size =
(aligned_height + 2 * border) * (uint64_t)y_stride + byte_alignment;
const int uv_width = aligned_width >> ss_x;
const int uv_height = aligned_height >> ss_y;
const int uv_stride = y_stride >> ss_x;
const int uv_border_w = border >> ss_x;
const int uv_border_h = border >> ss_y;
const uint64_t uvplane_size =
(uv_height + 2 * uv_border_h) * (uint64_t)uv_stride + byte_alignment;
const uint64_t frame_size =
(1 + use_highbitdepth) * (yplane_size + 2 * uvplane_size);
uint8_t *buf = NULL;
if (cb != NULL) {
const int align_addr_extra_size = 31;
const uint64_t external_frame_size = frame_size + align_addr_extra_size;
assert(fb != NULL);
if (external_frame_size != (size_t)external_frame_size) return -1;
// Allocation to hold larger frame, or first allocation.
if (cb(cb_priv, (size_t)external_frame_size, fb) < 0) return -1;
if (fb->data == NULL || fb->size < external_frame_size) return -1;
ybf->buffer_alloc = (uint8_t *)yv12_align_addr(fb->data, 32);
#if defined(__has_feature)
#if __has_feature(memory_sanitizer)
// This memset is needed for fixing the issue of using uninitialized
// value in msan test. It will cause a perf loss, so only do this for
// msan test.
memset(ybf->buffer_alloc, 0, (int)frame_size);
#endif
#endif
} else if (frame_size > (size_t)ybf->buffer_alloc_sz) {
// Allocation to hold larger frame, or first allocation.
aom_free(ybf->buffer_alloc);
ybf->buffer_alloc = NULL;
if (frame_size != (size_t)frame_size) return -1;
ybf->buffer_alloc = (uint8_t *)aom_memalign(32, (size_t)frame_size);
if (!ybf->buffer_alloc) return -1;
ybf->buffer_alloc_sz = (size_t)frame_size;
// This memset is needed for fixing valgrind error from C loop filter
// due to access uninitialized memory in frame border. It could be
// removed if border is totally removed.
memset(ybf->buffer_alloc, 0, ybf->buffer_alloc_sz);
}
/* Only support allocating buffers that have a border that's a multiple
* of 32. The border restriction is required to get 16-byte alignment of
* the start of the chroma rows without introducing an arbitrary gap
* between planes, which would break the semantics of things like
* aom_img_set_rect(). */
if (border & 0x1f) return -3;
ybf->y_crop_width = width;
ybf->y_crop_height = height;
ybf->y_width = aligned_width;
ybf->y_height = aligned_height;
ybf->y_stride = y_stride;
ybf->uv_crop_width = (width + ss_x) >> ss_x;
ybf->uv_crop_height = (height + ss_y) >> ss_y;
ybf->uv_width = uv_width;
ybf->uv_height = uv_height;
ybf->uv_stride = uv_stride;
ybf->border = border;
ybf->frame_size = (size_t)frame_size;
ybf->subsampling_x = ss_x;
ybf->subsampling_y = ss_y;
buf = ybf->buffer_alloc;
if (use_highbitdepth) {
// Store uint16 addresses when using 16bit framebuffers
buf = CONVERT_TO_BYTEPTR(ybf->buffer_alloc);
ybf->flags = YV12_FLAG_HIGHBITDEPTH;
} else {
ybf->flags = 0;
}
ybf->y_buffer = (uint8_t *)yv12_align_addr(
buf + (border * y_stride) + border, aom_byte_align);
ybf->u_buffer = (uint8_t *)yv12_align_addr(
buf + yplane_size + (uv_border_h * uv_stride) + uv_border_w,
aom_byte_align);
ybf->v_buffer =
(uint8_t *)yv12_align_addr(buf + yplane_size + uvplane_size +
(uv_border_h * uv_stride) + uv_border_w,
aom_byte_align);
ybf->use_external_reference_buffers = 0;
if (use_highbitdepth) {
if (ybf->y_buffer_8bit) aom_free(ybf->y_buffer_8bit);
ybf->y_buffer_8bit = (uint8_t *)aom_memalign(32, (size_t)yplane_size);
if (!ybf->y_buffer_8bit) return -1;
} else {
assert(!ybf->y_buffer_8bit);
}
ybf->corrupted = 0; /* assume not corrupted by errors */
return 0;
}
return -2;
}
int aom_alloc_frame_buffer(YV12_BUFFER_CONFIG *ybf, int width, int height,
int ss_x, int ss_y, int use_highbitdepth, int border,
int byte_alignment) {
if (ybf) {
aom_free_frame_buffer(ybf);
return aom_realloc_frame_buffer(ybf, width, height, ss_x, ss_y,
use_highbitdepth, border, byte_alignment,
NULL, NULL, NULL);
}
return -2;
}
|
