--- /dev/null
+/*
+ * Copyright (C) 2011 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.
+ */
+
+/*
+ * Contains implementation of a class CallbackNotifier that manages callbacks set
+ * via set_callbacks, enable_msg_type, and disable_msg_type camera HAL API.
+ */
+
+#define LOG_NDEBUG 0
+#define LOG_TAG "EmulatedCamera_CallbackNotifier"
+#include <cutils/log.h>
+#include <MetadataBufferType.h>
+#include "EmulatedCameraDevice.h"
+#include "CallbackNotifier.h"
+#include "JpegCompressor.h"
+
+namespace android {
+
+/* String representation of camera messages. */
+static const char* lCameraMessages[] =
+{
+ "CAMERA_MSG_ERROR",
+ "CAMERA_MSG_SHUTTER",
+ "CAMERA_MSG_FOCUS",
+ "CAMERA_MSG_ZOOM",
+ "CAMERA_MSG_PREVIEW_FRAME",
+ "CAMERA_MSG_VIDEO_FRAME",
+ "CAMERA_MSG_POSTVIEW_FRAME",
+ "CAMERA_MSG_RAW_IMAGE",
+ "CAMERA_MSG_COMPRESSED_IMAGE",
+ "CAMERA_MSG_RAW_IMAGE_NOTIFY",
+ "CAMERA_MSG_PREVIEW_METADATA"
+};
+static const int lCameraMessagesNum = sizeof(lCameraMessages) / sizeof(char*);
+
+/* Builds an array of strings for the given set of messages.
+ * Param:
+ * msg - Messages to get strings for,
+ * strings - Array where to save strings
+ * max - Maximum number of entries in the array.
+ * Return:
+ * Number of strings saved into the 'strings' array.
+ */
+static int GetMessageStrings(uint32_t msg, const char** strings, int max)
+{
+ int index = 0;
+ int out = 0;
+ while (msg != 0 && out < max && index < lCameraMessagesNum) {
+ while ((msg & 0x1) == 0 && index < lCameraMessagesNum) {
+ msg >>= 1;
+ index++;
+ }
+ if ((msg & 0x1) != 0 && index < lCameraMessagesNum) {
+ strings[out] = lCameraMessages[index];
+ out++;
+ msg >>= 1;
+ index++;
+ }
+ }
+
+ return out;
+}
+
+/* Logs messages, enabled by the mask. */
+static void PrintMessages(uint32_t msg)
+{
+ const char* strs[lCameraMessagesNum];
+ const int translated = GetMessageStrings(msg, strs, lCameraMessagesNum);
+ for (int n = 0; n < translated; n++) {
+ ALOGV(" %s", strs[n]);
+ }
+}
+
+CallbackNotifier::CallbackNotifier()
+ : mNotifyCB(NULL),
+ mDataCB(NULL),
+ mDataCBTimestamp(NULL),
+ mGetMemoryCB(NULL),
+ mCBOpaque(NULL),
+ mLastFrameTimestamp(0),
+ mFrameRefreshFreq(0),
+ mMessageEnabler(0),
+ mJpegQuality(90),
+ mVideoRecEnabled(false),
+ mTakingPicture(false)
+{
+}
+
+CallbackNotifier::~CallbackNotifier()
+{
+}
+
+/****************************************************************************
+ * Camera API
+ ***************************************************************************/
+
+void CallbackNotifier::setCallbacks(camera_notify_callback notify_cb,
+ camera_data_callback data_cb,
+ camera_data_timestamp_callback data_cb_timestamp,
+ camera_request_memory get_memory,
+ void* user)
+{
+ ALOGV("%s: %p, %p, %p, %p (%p)",
+ __FUNCTION__, notify_cb, data_cb, data_cb_timestamp, get_memory, user);
+
+ Mutex::Autolock locker(&mObjectLock);
+ mNotifyCB = notify_cb;
+ mDataCB = data_cb;
+ mDataCBTimestamp = data_cb_timestamp;
+ mGetMemoryCB = get_memory;
+ mCBOpaque = user;
+}
+
+void CallbackNotifier::enableMessage(uint msg_type)
+{
+ ALOGV("%s: msg_type = 0x%x", __FUNCTION__, msg_type);
+ PrintMessages(msg_type);
+
+ Mutex::Autolock locker(&mObjectLock);
+ mMessageEnabler |= msg_type;
+ ALOGV("**** Currently enabled messages:");
+ PrintMessages(mMessageEnabler);
+}
+
+void CallbackNotifier::disableMessage(uint msg_type)
+{
+ ALOGV("%s: msg_type = 0x%x", __FUNCTION__, msg_type);
+ PrintMessages(msg_type);
+
+ Mutex::Autolock locker(&mObjectLock);
+ mMessageEnabler &= ~msg_type;
+ ALOGV("**** Currently enabled messages:");
+ PrintMessages(mMessageEnabler);
+}
+
+status_t CallbackNotifier::enableVideoRecording(int fps)
+{
+ ALOGV("%s: FPS = %d", __FUNCTION__, fps);
+
+ Mutex::Autolock locker(&mObjectLock);
+ mVideoRecEnabled = true;
+ mLastFrameTimestamp = 0;
+ mFrameRefreshFreq = 1000000000LL / fps;
+
+ return NO_ERROR;
+}
+
+void CallbackNotifier::disableVideoRecording()
+{
+ ALOGV("%s:", __FUNCTION__);
+
+ Mutex::Autolock locker(&mObjectLock);
+ mVideoRecEnabled = false;
+ mLastFrameTimestamp = 0;
+ mFrameRefreshFreq = 0;
+}
+
+void CallbackNotifier::releaseRecordingFrame(const void* opaque)
+{
+ List<camera_memory_t*>::iterator it = mCameraMemoryTs.begin();
+ for( ; it != mCameraMemoryTs.end(); ++it ) {
+ if ( (*it)->data == opaque ) {
+ (*it)->release( *it );
+ mCameraMemoryTs.erase(it);
+ break;
+ }
+ }
+}
+
+status_t CallbackNotifier::storeMetaDataInBuffers(bool enable)
+{
+ // Return error if metadata is request, otherwise silently agree.
+ return enable ? INVALID_OPERATION : NO_ERROR;
+}
+
+/****************************************************************************
+ * Public API
+ ***************************************************************************/
+
+void CallbackNotifier::cleanupCBNotifier()
+{
+ Mutex::Autolock locker(&mObjectLock);
+ mMessageEnabler = 0;
+ mNotifyCB = NULL;
+ mDataCB = NULL;
+ mDataCBTimestamp = NULL;
+ mGetMemoryCB = NULL;
+ mCBOpaque = NULL;
+ mLastFrameTimestamp = 0;
+ mFrameRefreshFreq = 0;
+ mJpegQuality = 90;
+ mVideoRecEnabled = false;
+ mTakingPicture = false;
+}
+
+void CallbackNotifier::onNextFrameAvailable(const void* frame,
+ nsecs_t timestamp,
+ EmulatedCameraDevice* camera_dev)
+{
+ if (isMessageEnabled(CAMERA_MSG_VIDEO_FRAME) && isVideoRecordingEnabled() &&
+ isNewVideoFrameTime(timestamp)) {
+ camera_memory_t* cam_buff =
+ mGetMemoryCB(-1, camera_dev->getFrameBufferSize(), 1, NULL);
+ if (NULL != cam_buff && NULL != cam_buff->data) {
+ memcpy(cam_buff->data, frame, camera_dev->getFrameBufferSize());
+ mDataCBTimestamp(timestamp, CAMERA_MSG_VIDEO_FRAME,
+ cam_buff, 0, mCBOpaque);
+
+ mCameraMemoryTs.push_back( cam_buff );
+ } else {
+ ALOGE("%s: Memory failure in CAMERA_MSG_VIDEO_FRAME", __FUNCTION__);
+ }
+ }
+
+ if (isMessageEnabled(CAMERA_MSG_PREVIEW_FRAME)) {
+ camera_memory_t* cam_buff =
+ mGetMemoryCB(-1, camera_dev->getFrameBufferSize(), 1, NULL);
+ if (NULL != cam_buff && NULL != cam_buff->data) {
+ memcpy(cam_buff->data, frame, camera_dev->getFrameBufferSize());
+ mDataCB(CAMERA_MSG_PREVIEW_FRAME, cam_buff, 0, NULL, mCBOpaque);
+ cam_buff->release(cam_buff);
+ } else {
+ ALOGE("%s: Memory failure in CAMERA_MSG_PREVIEW_FRAME", __FUNCTION__);
+ }
+ }
+
+ if (mTakingPicture) {
+ /* This happens just once. */
+ mTakingPicture = false;
+ /* The sequence of callbacks during picture taking is:
+ * - CAMERA_MSG_SHUTTER
+ * - CAMERA_MSG_RAW_IMAGE_NOTIFY
+ * - CAMERA_MSG_COMPRESSED_IMAGE
+ */
+ if (isMessageEnabled(CAMERA_MSG_SHUTTER)) {
+ mNotifyCB(CAMERA_MSG_SHUTTER, 0, 0, mCBOpaque);
+ }
+ if (isMessageEnabled(CAMERA_MSG_RAW_IMAGE_NOTIFY)) {
+ mNotifyCB(CAMERA_MSG_RAW_IMAGE_NOTIFY, 0, 0, mCBOpaque);
+ }
+ if (isMessageEnabled(CAMERA_MSG_COMPRESSED_IMAGE)) {
+ /* Compress the frame to JPEG. Note that when taking pictures, we
+ * have requested camera device to provide us with NV21 frames. */
+ NV21JpegCompressor compressor;
+ status_t res =
+ compressor.compressRawImage(frame, camera_dev->getFrameWidth(),
+ camera_dev->getFrameHeight(),
+ mJpegQuality);
+ if (res == NO_ERROR) {
+ camera_memory_t* jpeg_buff =
+ mGetMemoryCB(-1, compressor.getCompressedSize(), 1, NULL);
+ if (NULL != jpeg_buff && NULL != jpeg_buff->data) {
+ compressor.getCompressedImage(jpeg_buff->data);
+ mDataCB(CAMERA_MSG_COMPRESSED_IMAGE, jpeg_buff, 0, NULL, mCBOpaque);
+ jpeg_buff->release(jpeg_buff);
+ } else {
+ ALOGE("%s: Memory failure in CAMERA_MSG_VIDEO_FRAME", __FUNCTION__);
+ }
+ } else {
+ ALOGE("%s: Compression failure in CAMERA_MSG_VIDEO_FRAME", __FUNCTION__);
+ }
+ }
+ }
+}
+
+void CallbackNotifier::onCameraDeviceError(int err)
+{
+ if (isMessageEnabled(CAMERA_MSG_ERROR) && mNotifyCB != NULL) {
+ mNotifyCB(CAMERA_MSG_ERROR, err, 0, mCBOpaque);
+ }
+}
+
+/****************************************************************************
+ * Private API
+ ***************************************************************************/
+
+bool CallbackNotifier::isNewVideoFrameTime(nsecs_t timestamp)
+{
+ Mutex::Autolock locker(&mObjectLock);
+ if ((timestamp - mLastFrameTimestamp) >= mFrameRefreshFreq) {
+ mLastFrameTimestamp = timestamp;
+ return true;
+ }
+ return false;
+}
+
+}; /* namespace android */
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