1/*
2 * Copyright (C) 2013 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#define LOG_NDEBUG 0
18#define LOG_TAG "EmulatedCamera_JPEGStub"
19#include <errno.h>
20#include <cutils/log.h>
21#include <YuvToJpegEncoder.h>
22
23#include "JpegStub.h"
24
25
26extern "C" void JpegStub_init(JpegStub* stub, int* strides) {
27    stub->mInternalEncoder = (void*) new Yuv420SpToJpegEncoder(strides);
28    stub->mInternalStream = (void*)new SkDynamicMemoryWStream();
29}
30
31extern "C" void JpegStub_cleanup(JpegStub* stub) {
32    delete((Yuv420SpToJpegEncoder*)stub->mInternalEncoder);
33    delete((SkDynamicMemoryWStream*)stub->mInternalStream);
34}
35
36extern "C" int JpegStub_compress(JpegStub* stub, const void* image,
37        int width, int height, int quality)
38{
39    void* pY = const_cast<void*>(image);
40    int offsets[2];
41    offsets[0] = 0;
42    offsets[1] = width * height;
43
44    Yuv420SpToJpegEncoder* encoder =
45        (Yuv420SpToJpegEncoder*)stub->mInternalEncoder;
46    SkDynamicMemoryWStream* stream =
47        (SkDynamicMemoryWStream*)stub->mInternalStream;
48    if (encoder->encode(stream, pY, width, height, offsets, quality)) {
49        ALOGV("%s: Compressed JPEG: %d[%dx%d] -> %zu bytes",
50              __FUNCTION__, (width * height * 12) / 8,
51              width, height, stream->getOffset());
52        return 0;
53    } else {
54        ALOGE("%s: JPEG compression failed", __FUNCTION__);
55        return errno ? errno: EINVAL;
56    }
57}
58
59extern "C" void JpegStub_getCompressedImage(JpegStub* stub, void* buff) {
60    SkDynamicMemoryWStream* stream =
61        (SkDynamicMemoryWStream*)stub->mInternalStream;
62    stream->copyTo(buff);
63}
64
65extern "C" size_t JpegStub_getCompressedSize(JpegStub* stub) {
66    SkDynamicMemoryWStream* stream =
67        (SkDynamicMemoryWStream*)stub->mInternalStream;
68    return stream->getOffset();
69}
70