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
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
|
/* SPDX-License-Identifier: LGPL-2.1-or-later */
/*
* Copyright (C) 2020, Google Inc.
*
* JPEG Post Processor
*/
#include "post_processor_jpeg.h"
#include <chrono>
#include "../camera_device.h"
#include "../camera_metadata.h"
#include "../camera_request.h"
#if defined(OS_CHROMEOS)
#include "encoder_jea.h"
#else /* !defined(OS_CHROMEOS) */
#include "encoder_libjpeg.h"
#endif
#include "exif.h"
#include <libcamera/base/log.h>
#include <libcamera/formats.h>
using namespace libcamera;
using namespace std::chrono_literals;
LOG_DEFINE_CATEGORY(JPEG)
PostProcessorJpeg::PostProcessorJpeg(CameraDevice *const device)
: cameraDevice_(device)
{
}
int PostProcessorJpeg::configure(const StreamConfiguration &inCfg,
const StreamConfiguration &outCfg)
{
if (inCfg.size != outCfg.size) {
LOG(JPEG, Error) << "Mismatch of input and output stream sizes";
return -EINVAL;
}
if (outCfg.pixelFormat != formats::MJPEG) {
LOG(JPEG, Error) << "Output stream pixel format is not JPEG";
return -EINVAL;
}
streamSize_ = outCfg.size;
thumbnailer_.configure(inCfg.size, inCfg.pixelFormat);
#if defined(OS_CHROMEOS)
encoder_ = std::make_unique<EncoderJea>();
#else /* !defined(OS_CHROMEOS) */
encoder_ = std::make_unique<EncoderLibJpeg>();
#endif
return encoder_->configure(inCfg);
}
void PostProcessorJpeg::generateThumbnail(const FrameBuffer &source,
const Size &targetSize,
unsigned int quality,
std::vector<unsigned char> *thumbnail)
{
/* Stores the raw scaled-down thumbnail bytes. */
std::vector<unsigned char> rawThumbnail;
thumbnailer_.createThumbnail(source, targetSize, &rawThumbnail);
StreamConfiguration thCfg;
thCfg.size = targetSize;
thCfg.pixelFormat = thumbnailer_.pixelFormat();
int ret = thumbnailEncoder_.configure(thCfg);
if (!rawThumbnail.empty() && !ret) {
/*
* \todo Avoid value-initialization of all elements of the
* vector.
*/
thumbnail->resize(rawThumbnail.size());
/*
* Split planes manually as the encoder expects a vector of
* planes.
*
* \todo Pass a vector of planes directly to
* Thumbnailer::createThumbnailer above and remove the manual
* planes split from here.
*/
std::vector<Span<uint8_t>> thumbnailPlanes;
const PixelFormatInfo &formatNV12 = PixelFormatInfo::info(formats::NV12);
size_t yPlaneSize = formatNV12.planeSize(targetSize, 0);
size_t uvPlaneSize = formatNV12.planeSize(targetSize, 1);
thumbnailPlanes.push_back({ rawThumbnail.data(), yPlaneSize });
thumbnailPlanes.push_back({ rawThumbnail.data() + yPlaneSize, uvPlaneSize });
int jpeg_size = thumbnailEncoder_.encode(thumbnailPlanes,
*thumbnail, {}, quality);
thumbnail->resize(jpeg_size);
LOG(JPEG, Debug)
<< "Thumbnail compress returned "
<< jpeg_size << " bytes";
}
}
void PostProcessorJpeg::process(Camera3RequestDescriptor::StreamBuffer *streamBuffer)
{
ASSERT(encoder_);
const FrameBuffer &source = *streamBuffer->srcBuffer;
CameraBuffer *destination = streamBuffer->dstBuffer.get();
ASSERT(destination->numPlanes() == 1);
const CameraMetadata &requestMetadata = streamBuffer->request->settings_;
CameraMetadata *resultMetadata = streamBuffer->request->resultMetadata_.get();
camera_metadata_ro_entry_t entry;
int ret;
/* Set EXIF metadata for various tags. */
Exif exif;
exif.setMake(cameraDevice_->maker());
exif.setModel(cameraDevice_->model());
ret = requestMetadata.getEntry(ANDROID_JPEG_ORIENTATION, &entry);
const uint32_t jpegOrientation = ret ? *entry.data.i32 : 0;
resultMetadata->addEntry(ANDROID_JPEG_ORIENTATION, jpegOrientation);
exif.setOrientation(jpegOrientation);
exif.setSize(streamSize_);
/*
* We set the frame's EXIF timestamp as the time of encode.
* Since the precision we need for EXIF timestamp is only one
* second, it is good enough.
*/
exif.setTimestamp(std::time(nullptr), 0ms);
ret = resultMetadata->getEntry(ANDROID_SENSOR_EXPOSURE_TIME, &entry);
exif.setExposureTime(ret ? *entry.data.i64 : 0);
ret = requestMetadata.getEntry(ANDROID_LENS_APERTURE, &entry);
if (ret)
exif.setAperture(*entry.data.f);
ret = resultMetadata->getEntry(ANDROID_SENSOR_SENSITIVITY, &entry);
exif.setISO(ret ? *entry.data.i32 : 100);
exif.setFlash(Exif::Flash::FlashNotPresent);
exif.setWhiteBalance(Exif::WhiteBalance::Auto);
exif.setFocalLength(1.0);
ret = requestMetadata.getEntry(ANDROID_JPEG_GPS_TIMESTAMP, &entry);
if (ret) {
exif.setGPSDateTimestamp(*entry.data.i64);
resultMetadata->addEntry(ANDROID_JPEG_GPS_TIMESTAMP,
*entry.data.i64);
}
ret = requestMetadata.getEntry(ANDROID_JPEG_THUMBNAIL_SIZE, &entry);
if (ret) {
const int32_t *data = entry.data.i32;
Size thumbnailSize = { static_cast<uint32_t>(data[0]),
static_cast<uint32_t>(data[1]) };
ret = requestMetadata.getEntry(ANDROID_JPEG_THUMBNAIL_QUALITY, &entry);
uint8_t quality = ret ? *entry.data.u8 : 95;
resultMetadata->addEntry(ANDROID_JPEG_THUMBNAIL_QUALITY, quality);
if (thumbnailSize != Size(0, 0)) {
std::vector<unsigned char> thumbnail;
generateThumbnail(source, thumbnailSize, quality, &thumbnail);
if (!thumbnail.empty())
exif.setThumbnail(std::move(thumbnail), Exif::Compression::JPEG);
}
resultMetadata->addEntry(ANDROID_JPEG_THUMBNAIL_SIZE, data, 2);
}
ret = requestMetadata.getEntry(ANDROID_JPEG_GPS_COORDINATES, &entry);
if (ret) {
exif.setGPSLocation(entry.data.d);
resultMetadata->addEntry(ANDROID_JPEG_GPS_COORDINATES,
entry.data.d, 3);
}
ret = requestMetadata.getEntry(ANDROID_JPEG_GPS_PROCESSING_METHOD, &entry);
if (ret) {
std::string method(entry.data.u8, entry.data.u8 + entry.count);
exif.setGPSMethod(method);
resultMetadata->addEntry(ANDROID_JPEG_GPS_PROCESSING_METHOD,
entry.data.u8, entry.count);
}
if (exif.generate() != 0)
LOG(JPEG, Error) << "Failed to generate valid EXIF data";
ret = requestMetadata.getEntry(ANDROID_JPEG_QUALITY, &entry);
const uint8_t quality = ret ? *entry.data.u8 : 95;
resultMetadata->addEntry(ANDROID_JPEG_QUALITY, quality);
int jpeg_size = encoder_->encode(streamBuffer, exif.data(), quality);
if (jpeg_size < 0) {
LOG(JPEG, Error) << "Failed to encode stream image";
processComplete.emit(streamBuffer, PostProcessor::Status::Error);
return;
}
/* Fill in the JPEG blob header. */
uint8_t *resultPtr = destination->plane(0).data()
+ destination->jpegBufferSize(cameraDevice_->maxJpegBufferSize())
- sizeof(struct camera3_jpeg_blob);
auto *blob = reinterpret_cast<struct camera3_jpeg_blob *>(resultPtr);
blob->jpeg_blob_id = CAMERA3_JPEG_BLOB_ID;
blob->jpeg_size = jpeg_size;
/* Update the JPEG result Metadata. */
resultMetadata->addEntry(ANDROID_JPEG_SIZE, jpeg_size);
processComplete.emit(streamBuffer, PostProcessor::Status::Success);
}
|
