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
|
/* SPDX-License-Identifier: LGPL-2.1-or-later */
/*
* Copyright (C) 2021, Google Inc.
*
* Allocate FrameBuffer using gralloc API
*/
#include <dlfcn.h>
#include <memory>
#include <vector>
#include <libcamera/base/log.h>
#include <libcamera/base/shared_fd.h>
#include "libcamera/internal/formats.h"
#include "libcamera/internal/framebuffer.h"
#include <hardware/camera3.h>
#include <hardware/gralloc.h>
#include <hardware/hardware.h>
#include "../camera_device.h"
#include "../frame_buffer_allocator.h"
#include "../hal_framebuffer.h"
using namespace libcamera;
LOG_DECLARE_CATEGORY(HAL)
namespace {
class GenericFrameBufferData : public FrameBuffer::Private
{
LIBCAMERA_DECLARE_PUBLIC(FrameBuffer)
public:
GenericFrameBufferData(struct alloc_device_t *allocDevice,
buffer_handle_t handle,
const std::vector<FrameBuffer::Plane> &planes)
: FrameBuffer::Private(planes), allocDevice_(allocDevice),
handle_(handle)
{
ASSERT(allocDevice_);
ASSERT(handle_);
}
~GenericFrameBufferData() override
{
/*
* allocDevice_ is used to destroy handle_. allocDevice_ is
* owned by PlatformFrameBufferAllocator::Private.
* GenericFrameBufferData must be destroyed before it is
* destroyed.
*
* \todo Consider managing alloc_device_t with std::shared_ptr
* if this is difficult to maintain.
*
* \todo Thread safety against alloc_device_t is not documented.
* Is it no problem to call alloc/free in parallel?
*/
allocDevice_->free(allocDevice_, handle_);
}
private:
struct alloc_device_t *allocDevice_;
const buffer_handle_t handle_;
};
} /* namespace */
class PlatformFrameBufferAllocator::Private : public Extensible::Private
{
LIBCAMERA_DECLARE_PUBLIC(PlatformFrameBufferAllocator)
public:
Private(CameraDevice *const cameraDevice)
: cameraDevice_(cameraDevice),
hardwareModule_(nullptr),
allocDevice_(nullptr)
{
hw_get_module(GRALLOC_HARDWARE_MODULE_ID, &hardwareModule_);
ASSERT(hardwareModule_);
}
~Private() override;
std::unique_ptr<HALFrameBuffer>
allocate(int halPixelFormat, const libcamera::Size &size, uint32_t usage);
private:
const CameraDevice *const cameraDevice_;
const struct hw_module_t *hardwareModule_;
struct alloc_device_t *allocDevice_;
};
PlatformFrameBufferAllocator::Private::~Private()
{
if (allocDevice_)
gralloc_close(allocDevice_);
dlclose(hardwareModule_->dso);
}
std::unique_ptr<HALFrameBuffer>
PlatformFrameBufferAllocator::Private::allocate(int halPixelFormat,
const libcamera::Size &size,
uint32_t usage)
{
if (!allocDevice_) {
int ret = gralloc_open(hardwareModule_, &allocDevice_);
if (ret) {
LOG(HAL, Fatal) << "gralloc_open() failed: " << ret;
return nullptr;
}
}
int stride = 0;
buffer_handle_t handle = nullptr;
int ret = allocDevice_->alloc(allocDevice_, size.width, size.height,
halPixelFormat, usage, &handle, &stride);
if (ret) {
LOG(HAL, Error) << "failed buffer allocation: " << ret;
return nullptr;
}
if (!handle) {
LOG(HAL, Fatal) << "invalid buffer_handle_t";
return nullptr;
}
/* This code assumes the planes are mapped consecutively. */
const libcamera::PixelFormat pixelFormat =
cameraDevice_->capabilities()->toPixelFormat(halPixelFormat);
const auto &info = PixelFormatInfo::info(pixelFormat);
std::vector<FrameBuffer::Plane> planes(info.numPlanes());
SharedFD fd{ handle->data[0] };
size_t offset = 0;
for (auto [i, plane] : utils::enumerate(planes)) {
const size_t planeSize = info.planeSize(size.height, i, stride);
plane.fd = fd;
plane.offset = offset;
plane.length = planeSize;
offset += planeSize;
}
return std::make_unique<HALFrameBuffer>(
std::make_unique<GenericFrameBufferData>(
allocDevice_, handle, planes),
handle);
}
PUBLIC_FRAME_BUFFER_ALLOCATOR_IMPLEMENTATION
|
