1 /*
2 * Copyright (C) 2011 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 /*
18 * Contains implementation of a class NV21JpegCompressor that encapsulates a
19 * converter between NV21, and JPEG formats.
20 */
21
22 #define LOG_NDEBUG 0
23 #define LOG_TAG "EmulatedCamera_JPEG"
24 #include "JpegCompressor.h"
25 #include <assert.h>
26 #include <log/log.h>
27 #include <dlfcn.h>
28
29 namespace android {
30
31 void* NV21JpegCompressor::mDl = NULL;
32
getSymbol(void * dl,const char * signature)33 static void* getSymbol(void* dl, const char* signature) {
34 void* res = dlsym(dl, signature);
35 assert(res != NULL);
36
37 return res;
38 }
39
40 typedef void (*InitFunc)(JpegStub* stub);
41 typedef void (*CleanupFunc)(JpegStub* stub);
42 typedef int (*CompressFunc)(JpegStub* stub, const void* image, int width,
43 int height, int quality, ExifData* exifData);
44 typedef void (*GetCompressedImageFunc)(JpegStub* stub, void* buff);
45 typedef size_t (*GetCompressedSizeFunc)(JpegStub* stub);
46
NV21JpegCompressor()47 NV21JpegCompressor::NV21JpegCompressor() {
48 if (mDl == NULL) {
49 mDl = dlopen("/vendor/lib/hw/camera.cutf.jpeg.so", RTLD_NOW);
50 }
51 if (mDl == NULL) {
52 mDl = dlopen("/system/lib/hw/camera.cutf.jpeg.so", RTLD_NOW);
53 }
54 assert(mDl != NULL);
55
56 InitFunc f = (InitFunc)getSymbol(mDl, "JpegStub_init");
57 (*f)(&mStub);
58 }
59
~NV21JpegCompressor()60 NV21JpegCompressor::~NV21JpegCompressor() {
61 CleanupFunc f = (CleanupFunc)getSymbol(mDl, "JpegStub_cleanup");
62 (*f)(&mStub);
63 }
64
65 /****************************************************************************
66 * Public API
67 ***************************************************************************/
68
compressRawImage(const void * image,ExifData * exifData,int quality,int width,int height)69 status_t NV21JpegCompressor::compressRawImage(const void* image,
70 ExifData* exifData,
71 int quality,
72 int width,
73 int height) {
74 mStrides[0] = width;
75 mStrides[1] = width;
76 CompressFunc f = (CompressFunc)getSymbol(mDl, "JpegStub_compress");
77 return (status_t)(*f)(&mStub, image, width, height, quality, exifData);
78 }
79
getCompressedSize()80 size_t NV21JpegCompressor::getCompressedSize() {
81 GetCompressedSizeFunc f =
82 (GetCompressedSizeFunc)getSymbol(mDl, "JpegStub_getCompressedSize");
83 return (*f)(&mStub);
84 }
85
getCompressedImage(void * buff)86 void NV21JpegCompressor::getCompressedImage(void* buff) {
87 GetCompressedImageFunc f =
88 (GetCompressedImageFunc)getSymbol(mDl, "JpegStub_getCompressedImage");
89 (*f)(&mStub, buff);
90 }
91
92 }; /* namespace android */
93
