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/*
* Copyright (C) 2012 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
//#define LOG_NDEBUG 0
#define LOG_TAG "Camera2-JpegCompressor"
#include <utils/Log.h>
#include <ui/GraphicBufferMapper.h>
#include "JpegCompressor.h"
namespace android {
namespace camera2 {
JpegCompressor::JpegCompressor():
Thread(false),
mIsBusy(false),
mCaptureTime(0) {
}
JpegCompressor::~JpegCompressor() {
ALOGV("%s", __FUNCTION__);
Mutex::Autolock lock(mMutex);
}
status_t JpegCompressor::start(Vector<CpuConsumer::LockedBuffer*> buffers,
nsecs_t captureTime) {
ALOGV("%s", __FUNCTION__);
Mutex::Autolock busyLock(mBusyMutex);
if (mIsBusy) {
ALOGE("%s: Already processing a buffer!", __FUNCTION__);
return INVALID_OPERATION;
}
mIsBusy = true;
mBuffers = buffers;
mCaptureTime = captureTime;
status_t res;
res = run("JpegCompressor");
if (res != OK) {
ALOGE("%s: Unable to start up compression thread: %s (%d)",
__FUNCTION__, strerror(-res), res);
//delete mBuffers; // necessary?
}
return res;
}
status_t JpegCompressor::cancel() {
ALOGV("%s", __FUNCTION__);
requestExitAndWait();
return OK;
}
status_t JpegCompressor::readyToRun() {
ALOGV("%s", __FUNCTION__);
return OK;
}
bool JpegCompressor::threadLoop() {
ALOGV("%s", __FUNCTION__);
mAuxBuffer = mBuffers[0]; // input
mJpegBuffer = mBuffers[1]; // output
// Set up error management
mJpegErrorInfo = NULL;
JpegError error;
error.parent = this;
mCInfo.err = jpeg_std_error(&error);
mCInfo.err->error_exit = jpegErrorHandler;
jpeg_create_compress(&mCInfo);
if (checkError("Error initializing compression")) return false;
// Route compressed data straight to output stream buffer
JpegDestination jpegDestMgr;
jpegDestMgr.parent = this;
jpegDestMgr.init_destination = jpegInitDestination;
jpegDestMgr.empty_output_buffer = jpegEmptyOutputBuffer;
jpegDestMgr.term_destination = jpegTermDestination;
mCInfo.dest = &jpegDestMgr;
// Set up compression parameters
mCInfo.image_width = mAuxBuffer->width;
mCInfo.image_height = mAuxBuffer->height;
mCInfo.input_components = 1; // 3;
mCInfo.in_color_space = JCS_GRAYSCALE; // JCS_RGB
ALOGV("%s: image_width = %d, image_height = %d", __FUNCTION__, mCInfo.image_width, mCInfo.image_height);
jpeg_set_defaults(&mCInfo);
if (checkError("Error configuring defaults")) return false;
// Do compression
jpeg_start_compress(&mCInfo, TRUE);
if (checkError("Error starting compression")) return false;
size_t rowStride = mAuxBuffer->stride;// * 3;
const size_t kChunkSize = 32;
while (mCInfo.next_scanline < mCInfo.image_height) {
JSAMPROW chunk[kChunkSize];
for (size_t i = 0 ; i < kChunkSize; i++) {
chunk[i] = (JSAMPROW)
(mAuxBuffer->data + (i + mCInfo.next_scanline) * rowStride);
}
jpeg_write_scanlines(&mCInfo, chunk, kChunkSize);
if (checkError("Error while compressing")) return false;
if (exitPending()) {
ALOGV("%s: Cancel called, exiting early", __FUNCTION__);
cleanUp();
return false;
}
}
jpeg_finish_compress(&mCInfo);
if (checkError("Error while finishing compression")) return false;
cleanUp();
return false;
}
bool JpegCompressor::isBusy() {
ALOGV("%s", __FUNCTION__);
Mutex::Autolock busyLock(mBusyMutex);
return mIsBusy;
}
// old function -- TODO: update for new buffer type
bool JpegCompressor::isStreamInUse(uint32_t id) {
ALOGV("%s", __FUNCTION__);
Mutex::Autolock lock(mBusyMutex);
if (mBuffers.size() && mIsBusy) {
for (size_t i = 0; i < mBuffers.size(); i++) {
// if ( mBuffers[i].streamId == (int)id ) return true;
}
}
return false;
}
bool JpegCompressor::waitForDone(nsecs_t timeout) {
ALOGV("%s", __FUNCTION__);
Mutex::Autolock lock(mBusyMutex);
status_t res = OK;
if (mIsBusy) {
res = mDone.waitRelative(mBusyMutex, timeout);
}
return (res == OK);
}
bool JpegCompressor::checkError(const char *msg) {
ALOGV("%s", __FUNCTION__);
if (mJpegErrorInfo) {
char errBuffer[JMSG_LENGTH_MAX];
mJpegErrorInfo->err->format_message(mJpegErrorInfo, errBuffer);
ALOGE("%s: %s: %s",
__FUNCTION__, msg, errBuffer);
cleanUp();
mJpegErrorInfo = NULL;
return true;
}
return false;
}
void JpegCompressor::cleanUp() {
ALOGV("%s", __FUNCTION__);
jpeg_destroy_compress(&mCInfo);
Mutex::Autolock lock(mBusyMutex);
mIsBusy = false;
mDone.signal();
}
void JpegCompressor::jpegErrorHandler(j_common_ptr cinfo) {
ALOGV("%s", __FUNCTION__);
JpegError *error = static_cast<JpegError*>(cinfo->err);
error->parent->mJpegErrorInfo = cinfo;
}
void JpegCompressor::jpegInitDestination(j_compress_ptr cinfo) {
ALOGV("%s", __FUNCTION__);
JpegDestination *dest= static_cast<JpegDestination*>(cinfo->dest);
ALOGV("%s: Setting destination to %p, size %d",
__FUNCTION__, dest->parent->mJpegBuffer->data, kMaxJpegSize);
dest->next_output_byte = (JOCTET*)(dest->parent->mJpegBuffer->data);
dest->free_in_buffer = kMaxJpegSize;
}
boolean JpegCompressor::jpegEmptyOutputBuffer(j_compress_ptr cinfo) {
ALOGV("%s", __FUNCTION__);
ALOGE("%s: JPEG destination buffer overflow!",
__FUNCTION__);
return true;
}
void JpegCompressor::jpegTermDestination(j_compress_ptr cinfo) {
ALOGV("%s", __FUNCTION__);
ALOGV("%s: Done writing JPEG data. %d bytes left in buffer",
__FUNCTION__, cinfo->dest->free_in_buffer);
}
}; // namespace camera2
}; // namespace android
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