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 <cutils/log.h>
25 #include "JpegCompressor.h"
26
27 namespace android {
28
NV21JpegCompressor()29 NV21JpegCompressor::NV21JpegCompressor()
30 : Yuv420SpToJpegEncoder(mStrides)
31 {
32 }
33
~NV21JpegCompressor()34 NV21JpegCompressor::~NV21JpegCompressor()
35 {
36 }
37
38 /****************************************************************************
39 * Public API
40 ***************************************************************************/
41
compressRawImage(const void * image,int width,int height,int quality)42 status_t NV21JpegCompressor::compressRawImage(const void* image,
43 int width,
44 int height,
45 int quality)
46 {
47 ALOGV("%s: %p[%dx%d]", __FUNCTION__, image, width, height);
48 void* pY = const_cast<void*>(image);
49 int offsets[2];
50 offsets[0] = 0;
51 offsets[1] = width * height;
52 mStrides[0] = width;
53 mStrides[1] = width;
54 if (encode(&mStream, pY, width, height, offsets, quality)) {
55 ALOGV("%s: Compressed JPEG: %d[%dx%d] -> %d bytes",
56 __FUNCTION__, (width * height * 12) / 8, width, height, mStream.getOffset());
57 return NO_ERROR;
58 } else {
59 ALOGE("%s: JPEG compression failed", __FUNCTION__);
60 return errno ? errno : EINVAL;
61 }
62 }
63
64 }; /* namespace android */
65