/*
* 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 EmulatedCamera that encapsulates
* functionality common to all emulated cameras ("fake", "webcam", "video file",
* etc.). Instances of this class (for each emulated camera) are created during
* the construction of the EmulatedCameraFactory instance. This class serves as
* an entry point for all camera API calls that defined by camera_device_ops_t
* API.
*/
#define LOG_NDEBUG 0
#define LOG_TAG "EmulatedCamera_Camera"
#include <cutils/log.h>
#include <stdio.h>
#include "EmulatedCamera.h"
//#include "EmulatedFakeCameraDevice.h"
#include "Converters.h"
/* Defines whether we should trace parameter changes. */
#define DEBUG_PARAM 1
namespace android {
static const char* kValidFocusModes[] = {
CameraParameters::FOCUS_MODE_AUTO,
CameraParameters::FOCUS_MODE_INFINITY,
CameraParameters::FOCUS_MODE_MACRO,
CameraParameters::FOCUS_MODE_FIXED,
CameraParameters::FOCUS_MODE_EDOF,
CameraParameters::FOCUS_MODE_CONTINUOUS_VIDEO,
CameraParameters::FOCUS_MODE_CONTINUOUS_PICTURE,
};
#if DEBUG_PARAM
/* Calculates and logs parameter changes.
* Param:
* current - Current set of camera parameters.
* new_par - String representation of new parameters.
*/
static void PrintParamDiff(const CameraParameters& current, const char* new_par);
#else
#define PrintParamDiff(current, new_par) (void(0))
#endif /* DEBUG_PARAM */
/* A helper routine that adds a value to the camera parameter.
* Param:
* param - Camera parameter to add a value to.
* val - Value to add.
* Return:
* A new string containing parameter with the added value on success, or NULL on
* a failure. If non-NULL string is returned, the caller is responsible for
* freeing it with 'free'.
*/
static char* AddValue(const char* param, const char* val);
/*
* Check if a given string |value| equals at least one of the strings in |list|
*/
template<size_t N>
static bool IsValueInList(const char* value, const char* const (&list)[N])
{
for (size_t i = 0; i < N; ++i) {
if (strcmp(value, list[i]) == 0) {
return true;
}
}
return false;
}
static bool StringsEqual(const char* str1, const char* str2) {
if (str1 == nullptr && str2 == nullptr) {
return true;
}
if (str1 == nullptr || str2 == nullptr) {
return false;
}
return strcmp(str1, str2) == 0;
}
static bool GetFourCcFormatFromCameraParam(const char* fmt_str,
uint32_t* fmt_val) {
if (strcmp(fmt_str, CameraParameters::PIXEL_FORMAT_YUV420P) == 0) {
// Despite the name above this is a YVU format, specifically YV12
*fmt_val = V4L2_PIX_FMT_YVU420;
return true;
} else if (strcmp(fmt_str, CameraParameters::PIXEL_FORMAT_RGBA8888) == 0) {
*fmt_val = V4L2_PIX_FMT_RGB32;
return true;
} else if (strcmp(fmt_str, CameraParameters::PIXEL_FORMAT_YUV420SP) == 0) {
*fmt_val = V4L2_PIX_FMT_NV21;
return true;
}
return false;
}
EmulatedCamera::EmulatedCamera(int cameraId,
struct hw_module_t* module)
: EmulatedBaseCamera(cameraId,
HARDWARE_DEVICE_API_VERSION(1, 0),
&common,
module),
mPreviewWindow(),
mCallbackNotifier()
{
/* camera_device v1 fields. */
common.close = EmulatedCamera::close;
ops = &mDeviceOps;
priv = this;
}
EmulatedCamera::~EmulatedCamera()
{
}
/****************************************************************************
* Public API
***************************************************************************/
status_t EmulatedCamera::Initialize()
{
/* Preview formats supported by this HAL. */
char preview_formats[1024];
snprintf(preview_formats, sizeof(preview_formats), "%s,%s,%s",
CameraParameters::PIXEL_FORMAT_YUV420SP,
CameraParameters::PIXEL_FORMAT_YUV420P,
CameraParameters::PIXEL_FORMAT_RGBA8888);
/*
* Fake required parameters.
*/
mParameters.set(CameraParameters::KEY_RECORDING_HINT,
CameraParameters::FALSE);
mParameters.set(CameraParameters::KEY_SUPPORTED_JPEG_THUMBNAIL_SIZES, "320x240,0x0");
mParameters.set(CameraParameters::KEY_JPEG_THUMBNAIL_WIDTH, "320");
mParameters.set(CameraParameters::KEY_JPEG_THUMBNAIL_HEIGHT, "240");
mParameters.set(CameraParameters::KEY_JPEG_QUALITY, "90");
// Camera values for a Logitech B910 HD Webcam
// Focal length: 4.90 mm (from specs)
// Horizontal view angle: 61 degrees for 4:3 sizes,
// 70 degrees for 16:9 sizes (empirical)
// Vertical view angle: 45.8 degrees (= 61 * 3 / 4)
// (The Mac has only "4:3" image sizes; the correct angle
// is 51.0 degrees. [MacBook Pro (Retina, 15-inch, Mid 2014)])
mParameters.set(CameraParameters::KEY_FOCAL_LENGTH, "4.90");
mParameters.set(CameraParameters::KEY_HORIZONTAL_VIEW_ANGLE, "61.0");
mParameters.set(CameraParameters::KEY_VERTICAL_VIEW_ANGLE, "45.8");
mParameters.set(CameraParameters::KEY_JPEG_THUMBNAIL_QUALITY, "90");
/* Preview format settings used here are related to panoramic view only. It's
* not related to the preview window that works only with RGB frames, which
* is explicitly stated when set_buffers_geometry is called on the preview
* window object. */
mParameters.set(CameraParameters::KEY_SUPPORTED_PREVIEW_FORMATS,
preview_formats);
mParameters.setPreviewFormat(CameraParameters::PIXEL_FORMAT_YUV420SP);
/* We don't rely on the actual frame rates supported by the camera device,
* since we will emulate them through timeouts in the emulated camera device
* worker thread. */
mParameters.set(CameraParameters::KEY_SUPPORTED_PREVIEW_FRAME_RATES,
"30,24,20,15,10,5");
mParameters.set(CameraParameters::KEY_SUPPORTED_PREVIEW_FPS_RANGE, "(30000,30000)");
mParameters.set(CameraParameters::KEY_PREVIEW_FPS_RANGE, "30000,30000");
mParameters.setPreviewFrameRate(30);
/* Only PIXEL_FORMAT_YUV420P is accepted by video framework in emulator! */
mParameters.set(CameraParameters::KEY_VIDEO_FRAME_FORMAT,
CameraParameters::PIXEL_FORMAT_YUV420P);
mParameters.set(CameraParameters::KEY_SUPPORTED_PICTURE_FORMATS,
CameraParameters::PIXEL_FORMAT_JPEG);
mParameters.setPictureFormat(CameraParameters::PIXEL_FORMAT_JPEG);
/* Set exposure compensation. */
mParameters.set(CameraParameters::KEY_MAX_EXPOSURE_COMPENSATION, "6");
mParameters.set(CameraParameters::KEY_MIN_EXPOSURE_COMPENSATION, "-6");
mParameters.set(CameraParameters::KEY_EXPOSURE_COMPENSATION_STEP, "0.5");
mParameters.set(CameraParameters::KEY_EXPOSURE_COMPENSATION, "0");
/* Sets the white balance modes and the device-dependent scale factors. */
char supported_white_balance[1024];
snprintf(supported_white_balance, sizeof(supported_white_balance),
"%s,%s,%s,%s",
CameraParameters::WHITE_BALANCE_AUTO,
CameraParameters::WHITE_BALANCE_INCANDESCENT,
CameraParameters::WHITE_BALANCE_DAYLIGHT,
CameraParameters::WHITE_BALANCE_TWILIGHT);
mParameters.set(CameraParameters::KEY_SUPPORTED_WHITE_BALANCE,
supported_white_balance);
mParameters.set(CameraParameters::KEY_WHITE_BALANCE,
CameraParameters::WHITE_BALANCE_AUTO);
getCameraDevice()->initializeWhiteBalanceModes(
CameraParameters::WHITE_BALANCE_AUTO, 1.0f, 1.0f);
getCameraDevice()->initializeWhiteBalanceModes(
CameraParameters::WHITE_BALANCE_INCANDESCENT, 1.38f, 0.60f);
getCameraDevice()->initializeWhiteBalanceModes(
CameraParameters::WHITE_BALANCE_DAYLIGHT, 1.09f, 0.92f);
getCameraDevice()->initializeWhiteBalanceModes(
CameraParameters::WHITE_BALANCE_TWILIGHT, 0.92f, 1.22f);
getCameraDevice()->setWhiteBalanceMode(CameraParameters::WHITE_BALANCE_AUTO);
/* Set suported antibanding values */
mParameters.set(CameraParameters::KEY_SUPPORTED_ANTIBANDING,
CameraParameters::ANTIBANDING_AUTO);
mParameters.set(CameraParameters::KEY_ANTIBANDING,
CameraParameters::ANTIBANDING_AUTO);
/* Set control effect mode
* Bug: 30862244
* */
mParameters.set(CameraParameters::KEY_SUPPORTED_EFFECTS,
CameraParameters::EFFECT_NONE);
mParameters.set(CameraParameters::KEY_EFFECT,
CameraParameters::EFFECT_NONE);
/* Set focus distances for "near,optimal,far" */
mParameters.set(CameraParameters::KEY_FOCUS_DISTANCES,
"Infinity,Infinity,Infinity");
/* Not supported features
*/
mParameters.set(CameraParameters::KEY_SUPPORTED_FOCUS_MODES,
CameraParameters::FOCUS_MODE_FIXED);
mParameters.set(CameraParameters::KEY_FOCUS_MODE,
CameraParameters::FOCUS_MODE_FIXED);
return NO_ERROR;
}
void EmulatedCamera::onNextFrameAvailable(nsecs_t timestamp,
EmulatedCameraDevice* camera_dev)
{
/* Notify the preview window first. */
mPreviewWindow.onNextFrameAvailable(timestamp, camera_dev);
/* Notify callback notifier next. */
mCallbackNotifier.onNextFrameAvailable(timestamp, camera_dev);
}
void EmulatedCamera::onCameraDeviceError(int err)
{
/* Errors are reported through the callback notifier */
mCallbackNotifier.onCameraDeviceError(err);
}
void EmulatedCamera::setTakingPicture(bool takingPicture) {
mCallbackNotifier.setTakingPicture(takingPicture);
}
/****************************************************************************
* Camera API implementation.
***************************************************************************/
status_t EmulatedCamera::connectCamera(hw_device_t** device)
{
ALOGV("%s", __FUNCTION__);
status_t res = EINVAL;
EmulatedCameraDevice* const camera_dev = getCameraDevice();
ALOGE_IF(camera_dev == NULL, "%s: No camera device instance.", __FUNCTION__);
if (camera_dev != NULL) {
/* Connect to the camera device. */
res = getCameraDevice()->connectDevice();
if (res == NO_ERROR) {
*device = &common;
}
}
return -res;
}
status_t EmulatedCamera::closeCamera()
{
ALOGV("%s", __FUNCTION__);
return cleanupCamera();
}
status_t EmulatedCamera::getCameraInfo(struct camera_info* info)
{
ALOGV("%s", __FUNCTION__);
const char* valstr = NULL;
valstr = mParameters.get(EmulatedCamera::FACING_KEY);
if (valstr != NULL) {
if (strcmp(valstr, EmulatedCamera::FACING_FRONT) == 0) {
info->facing = CAMERA_FACING_FRONT;
}
else if (strcmp(valstr, EmulatedCamera::FACING_BACK) == 0) {
info->facing = CAMERA_FACING_BACK;
}
} else {
info->facing = CAMERA_FACING_BACK;
}
valstr = mParameters.get(EmulatedCamera::ORIENTATION_KEY);
if (valstr != NULL) {
info->orientation = atoi(valstr);
} else {
info->orientation = 0;
}
return EmulatedBaseCamera::getCameraInfo(info);
}
void EmulatedCamera::autoFocusComplete() {
mCallbackNotifier.autoFocusComplete();
}
status_t EmulatedCamera::setPreviewWindow(struct preview_stream_ops* window)
{
/* Callback should return a negative errno. */
return -mPreviewWindow.setPreviewWindow(window,
mParameters.getPreviewFrameRate());
}
void EmulatedCamera::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)
{
mCallbackNotifier.setCallbacks(notify_cb, data_cb, data_cb_timestamp,
get_memory, user);
}
void EmulatedCamera::enableMsgType(int32_t msg_type)
{
mCallbackNotifier.enableMessage(msg_type);
}
void EmulatedCamera::disableMsgType(int32_t msg_type)
{
mCallbackNotifier.disableMessage(msg_type);
}
int EmulatedCamera::isMsgTypeEnabled(int32_t msg_type)
{
return mCallbackNotifier.isMessageEnabled(msg_type);
}
status_t EmulatedCamera::startPreview()
{
/* Callback should return a negative errno. */
return -doStartPreview();
}
void EmulatedCamera::stopPreview()
{
/* The camera client will not pass on calls to set the preview window to
* NULL if the preview is not enabled. If preview is not enabled the camera
* client will instead simply destroy the preview window without notifying
* the HAL. Later on when preview is enabled again that means the HAL will
* attempt to use the old, destroyed window which will cause a crash.
* Instead we need to clear the preview window here, the client will set
* a preview window when needed. The preview window is cleared here instead
* of inside doStopPreview to prevent the window from being cleared when
* restarting the preview because of a parameter change. */
mPreviewWindow.setPreviewWindow(nullptr, 0);
doStopPreview();
}
int EmulatedCamera::isPreviewEnabled()
{
return mPreviewWindow.isPreviewEnabled();
}
status_t EmulatedCamera::storeMetaDataInBuffers(int enable)
{
/* Callback should return a negative errno. */
return mCallbackNotifier.storeMetaDataInBuffers(enable);
}
status_t EmulatedCamera::startRecording()
{
/* This callback should return a negative errno, hence all the negations */
if (!mPreviewWindow.isPreviewEnabled()) {
ALOGE("%s: start recording without preview enabled",
__FUNCTION__);
return INVALID_OPERATION;
}
int frameRate = mParameters.getPreviewFrameRate();
status_t res = mCallbackNotifier.enableVideoRecording(frameRate);
if (res != NO_ERROR) {
ALOGE("%s: CallbackNotifier failed to enable video recording",
__FUNCTION__);
stopRecording();
return -res;
}
EmulatedCameraDevice* const camera_dev = getCameraDevice();
if (camera_dev == nullptr || !camera_dev->isStarted()) {
// No need for restarts, the next preview start will use correct params
return NO_ERROR;
}
// If the camera is running we might have to restart it to accomodate
// whatever pixel format and frame size the caller wants.
uint32_t conf_fmt = 0;
res = getConfiguredPixelFormat(&conf_fmt);
if (res != NO_ERROR) {
stopRecording();
return -res;
}
uint32_t cur_fmt = camera_dev->getOriginalPixelFormat();
int conf_width = -1, conf_height = -1;
res = getConfiguredFrameSize(&conf_width, &conf_height);
if (res != NO_ERROR) {
stopRecording();
return -res;
}
int cur_width = camera_dev->getFrameWidth();
int cur_height = camera_dev->getFrameHeight();
if (cur_fmt != conf_fmt ||
cur_width != conf_width ||
cur_height != conf_height) {
// We need to perform a restart to use the new format or size and it
// has to be an asynchronous restart or this might block if the camera
// thread is currently delivering a frame.
if (!camera_dev->requestRestart(conf_width, conf_height, conf_fmt,
false /* takingPicture */,
false /* oneBurst */)) {
ALOGE("%s: Could not restart preview with new pixel format",
__FUNCTION__);
stopRecording();
return -EINVAL;
}
}
ALOGD("go all the way to the end");
return NO_ERROR;
}
void EmulatedCamera::stopRecording()
{
mCallbackNotifier.disableVideoRecording();
}
int EmulatedCamera::isRecordingEnabled()
{
return mCallbackNotifier.isVideoRecordingEnabled();
}
void EmulatedCamera::releaseRecordingFrame(const void* opaque)
{
mCallbackNotifier.releaseRecordingFrame(opaque);
}
status_t EmulatedCamera::setAutoFocus()
{
// Make sure to check that a preview is in progress. Otherwise this will
// silently fail because no callback will be called until the preview starts
// which might be never.
if (!isPreviewEnabled()) {
return EINVAL;
}
EmulatedCameraDevice* const camera_dev = getCameraDevice();
if (camera_dev && camera_dev->isStarted()) {
return camera_dev->setAutoFocus();
}
return EINVAL;
}
status_t EmulatedCamera::cancelAutoFocus()
{
// In this case we don't check if a preview is in progress or not. Unlike
// setAutoFocus this call will not silently fail without the check. If an
// auto-focus request is somehow pending without having preview enabled this
// will correctly cancel that pending auto-focus which seems reasonable.
EmulatedCameraDevice* const camera_dev = getCameraDevice();
if (camera_dev && camera_dev->isStarted()) {
return camera_dev->cancelAutoFocus();
}
return EINVAL;
}
status_t EmulatedCamera::takePicture()
{
ALOGV("%s", __FUNCTION__);
status_t res;
int width, height;
uint32_t org_fmt;
/* Collect frame info for the picture. */
mParameters.getPictureSize(&width, &height);
const char* pix_fmt = mParameters.getPictureFormat();
if (!GetFourCcFormatFromCameraParam(pix_fmt, &org_fmt)) {
// Also check for JPEG here, the function above does not do this since
// this is very specific to this use case.
if (strcmp(pix_fmt, CameraParameters::PIXEL_FORMAT_JPEG) == 0) {
/* We only have JPEG converted for NV21 format. */
org_fmt = V4L2_PIX_FMT_NV21;
} else {
ALOGE("%s: Unsupported pixel format %s", __FUNCTION__, pix_fmt);
return EINVAL;
}
}
/* Get JPEG quality. */
int jpeg_quality = mParameters.getInt(CameraParameters::KEY_JPEG_QUALITY);
if (jpeg_quality <= 0) {
jpeg_quality = 90; /* Fall back to default. */
}
/*
* Make sure preview is not running, and device is stopped before taking
* picture.
*/
EmulatedCameraDevice* const camera_dev = getCameraDevice();
mCallbackNotifier.setJpegQuality(jpeg_quality);
mCallbackNotifier.setCameraParameters(mParameters);
ALOGD("Starting camera for picture: %.4s(%s)[%dx%d]",
reinterpret_cast<const char*>(&org_fmt), pix_fmt, width, height);
if (mPreviewWindow.isPreviewEnabled()) {
mPreviewWindow.stopPreview();
/* If the camera preview is enabled we need to perform an asynchronous
* restart. A blocking restart could deadlock this thread as it's
* currently holding the camera client lock and the frame delivery could
* be stuck on waiting for that lock. If this was synchronous then this
* thread would in turn get stuck on waiting for the delivery thread. */
if (!camera_dev->requestRestart(width, height, org_fmt,
true /* takingPicture */,
true /* oneBurst */)) {
return UNKNOWN_ERROR;
}
return NO_ERROR;
} else {
ALOGE("%s: preview has not been enabled", __FUNCTION__);
return EINVAL;
}
}
status_t EmulatedCamera::cancelPicture()
{
ALOGV("%s", __FUNCTION__);
return NO_ERROR;
}
status_t EmulatedCamera::setParameters(const char* parms)
{
ALOGV("%s", __FUNCTION__);
PrintParamDiff(mParameters, parms);
CameraParameters new_param;
String8 str8_param(parms);
new_param.unflatten(str8_param);
bool restartPreview = false;
/*
* Check for new exposure compensation parameter.
*/
int new_exposure_compensation = new_param.getInt(
CameraParameters::KEY_EXPOSURE_COMPENSATION);
const int min_exposure_compensation = new_param.getInt(
CameraParameters::KEY_MIN_EXPOSURE_COMPENSATION);
const int max_exposure_compensation = new_param.getInt(
CameraParameters::KEY_MAX_EXPOSURE_COMPENSATION);
// Checks if the exposure compensation change is supported.
if ((min_exposure_compensation != 0) || (max_exposure_compensation != 0)) {
if (new_exposure_compensation > max_exposure_compensation) {
new_exposure_compensation = max_exposure_compensation;
}
if (new_exposure_compensation < min_exposure_compensation) {
new_exposure_compensation = min_exposure_compensation;
}
const int current_exposure_compensation = mParameters.getInt(
CameraParameters::KEY_EXPOSURE_COMPENSATION);
if (current_exposure_compensation != new_exposure_compensation) {
const float exposure_value = new_exposure_compensation *
new_param.getFloat(
CameraParameters::KEY_EXPOSURE_COMPENSATION_STEP);
getCameraDevice()->setExposureCompensation(
exposure_value);
}
}
const char* new_white_balance = new_param.get(
CameraParameters::KEY_WHITE_BALANCE);
const char* supported_white_balance = new_param.get(
CameraParameters::KEY_SUPPORTED_WHITE_BALANCE);
if ((supported_white_balance != NULL) && (new_white_balance != NULL) &&
(strstr(supported_white_balance, new_white_balance) != NULL)) {
const char* current_white_balance = mParameters.get(
CameraParameters::KEY_WHITE_BALANCE);
if ((current_white_balance == NULL) ||
(strcmp(current_white_balance, new_white_balance) != 0)) {
ALOGV("Setting white balance to %s", new_white_balance);
getCameraDevice()->setWhiteBalanceMode(new_white_balance);
}
}
int old_frame_rate = mParameters.getPreviewFrameRate();
int new_frame_rate = new_param.getPreviewFrameRate();
if (old_frame_rate != new_frame_rate) {
getCameraDevice()->setPreviewFrameRate(new_frame_rate);
}
// Validate focus mode
const char* focus_mode = new_param.get(CameraParameters::KEY_FOCUS_MODE);
if (focus_mode && !IsValueInList(focus_mode, kValidFocusModes)) {
return BAD_VALUE;
}
// Validate preview size, if there is no preview size the initial values of
// the integers below will be preserved thus intentionally failing the test
int new_preview_width = -1, new_preview_height = -1;
new_param.getPreviewSize(&new_preview_width, &new_preview_height);
if (new_preview_width < 0 || new_preview_height < 0) {
return BAD_VALUE;
}
// If the preview size has changed we have to restart the preview to make
// sure we provide frames of the correct size. The receiver assumes the
// frame size is correct and will copy all data provided into a buffer whose
// size is determined by the preview size without checks, potentially
// causing buffer overruns or underruns if there is a size mismatch.
int old_preview_width = -1, old_preview_height = -1;
mParameters.getPreviewSize(&old_preview_width, &old_preview_height);
if (old_preview_width != new_preview_width ||
old_preview_height != new_preview_height) {
restartPreview = true;
}
// For the same reasons as with the preview size we have to look for changes
// in video size and restart the preview if the size has changed.
int old_video_width = -1, old_video_height = -1;
int new_video_width = -1, new_video_height = -1;
mParameters.getVideoSize(&old_video_width, &old_video_height);
new_param.getVideoSize(&new_video_width, &new_video_height);
if (old_video_width != new_video_width ||
old_video_height != new_video_height) {
restartPreview = true;
}
// Restart the preview if the pixel format changes to make sure we serve
// the selected encoding to the client.
const char* old_format = mParameters.getPreviewFormat();
const char* new_format = new_param.getPreviewFormat();
if (!StringsEqual(old_format, new_format)) {
restartPreview = true;
}
const char* old_hint =
mParameters.get(CameraParameters::KEY_RECORDING_HINT);
const char* new_hint = new_param.get(CameraParameters::KEY_RECORDING_HINT);
if (!StringsEqual(old_hint, new_hint)) {
// The recording hint changed, this indicates we transitioned from
// recording to non-recording or the other way around. We need to look
// at a new pixel format for this and that requires a restart.
restartPreview = true;
}
mParameters = new_param;
// Now that the parameters have been assigned check if the preview needs to
// be restarted. If necessary this will then use the new parameters to set
// up the preview as requested by the caller.
if (restartPreview && isPreviewEnabled()) {
status_t status = doStopPreview();
if (status != NO_ERROR) {
ALOGE("%s: Stopping preview failed: %d", __FUNCTION__, status);
return status;
}
status = doStartPreview();
if (status != NO_ERROR) {
ALOGE("%s: Starting preview failed: %d", __FUNCTION__, status);
return status;
}
}
return NO_ERROR;
}
/* A dumb variable indicating "no params" / error on the exit from
* EmulatedCamera::getParameters(). */
static char lNoParam = '\0';
char* EmulatedCamera::getParameters()
{
// Read the image size and set the camera's Field of View.
// These values are valid for a Logitech B910 HD Webcam.
int width=0, height=0;
mParameters.getPictureSize(&width, &height);
if (height > 0) {
if (((double)width / height) < 1.55) {
// Closer to 4:3 (1.33), set the FOV to 61.0 degrees
mParameters.set(CameraParameters::KEY_HORIZONTAL_VIEW_ANGLE, "61.0");
} else {
// Closer to 16:9 (1.77), set the FOV to 70.0 degrees
mParameters.set(CameraParameters::KEY_HORIZONTAL_VIEW_ANGLE, "70.0");
}
}
String8 params(mParameters.flatten());
char* ret_str =
reinterpret_cast<char*>(malloc(sizeof(char) * (params.length()+1)));
memset(ret_str, 0, params.length()+1);
if (ret_str != NULL) {
strncpy(ret_str, params.string(), params.length()+1);
return ret_str;
} else {
ALOGE("%s: Unable to allocate string for %s", __FUNCTION__, params.string());
/* Apparently, we can't return NULL fron this routine. */
return &lNoParam;
}
}
void EmulatedCamera::putParameters(char* params)
{
/* This method simply frees parameters allocated in getParameters(). */
if (params != NULL && params != &lNoParam) {
free(params);
}
}
status_t EmulatedCamera::sendCommand(int32_t cmd, int32_t arg1, int32_t arg2)
{
ALOGV("%s: cmd = %d, arg1 = %d, arg2 = %d", __FUNCTION__, cmd, arg1, arg2);
switch (cmd) {
case CAMERA_CMD_START_FACE_DETECTION:
case CAMERA_CMD_STOP_FACE_DETECTION:
// We do not support hardware face detection so we need to indicate
// that any attempt to start/stop face detection is invalid
return BAD_VALUE;
}
/* TODO: Future enhancements. */
return 0;
}
void EmulatedCamera::releaseCamera()
{
ALOGV("%s", __FUNCTION__);
cleanupCamera();
}
status_t EmulatedCamera::dumpCamera(int fd)
{
ALOGV("%s", __FUNCTION__);
/* TODO: Future enhancements. */
dprintf(fd, "dump camera unimplemented\n");
return 0;
}
status_t EmulatedCamera::getConfiguredPixelFormat(uint32_t* pixelFormat) const {
const char* pix_fmt = nullptr;
const char* recordingHint =
mParameters.get(CameraParameters::KEY_RECORDING_HINT);
bool recordingHintOn = recordingHint && strcmp(recordingHint,
CameraParameters::TRUE) == 0;
bool recordingEnabled = mCallbackNotifier.isVideoRecordingEnabled();
if (recordingHintOn || recordingEnabled) {
// We're recording a video, use the video pixel format
pix_fmt = mParameters.get(CameraParameters::KEY_VIDEO_FRAME_FORMAT);
}
if (pix_fmt == nullptr) {
pix_fmt = mParameters.getPreviewFormat();
}
if (pix_fmt == nullptr) {
ALOGE("%s: Unable to obtain configured pixel format", __FUNCTION__);
return EINVAL;
}
/* Convert framework's pixel format to the FOURCC one. */
if (!GetFourCcFormatFromCameraParam(pix_fmt, pixelFormat)) {
ALOGE("%s: Unsupported pixel format %s", __FUNCTION__, pix_fmt);
return EINVAL;
}
return NO_ERROR;
}
status_t EmulatedCamera::getConfiguredFrameSize(int* outWidth,
int* outHeight) const {
int width = -1, height = -1;
if (mParameters.get(CameraParameters::KEY_VIDEO_SIZE) != nullptr) {
mParameters.getVideoSize(&width, &height);
} else {
mParameters.getPreviewSize(&width, &height);
}
if (width < 0 || height < 0) {
ALOGE("%s: No frame size configured for camera", __FUNCTION__);
return EINVAL;
}
// Only modify the out parameters once we know we succeeded
*outWidth = width;
*outHeight = height;
return NO_ERROR;
}
/****************************************************************************
* Preview management.
***************************************************************************/
status_t EmulatedCamera::doStartPreview()
{
ALOGV("%s", __FUNCTION__);
EmulatedCameraDevice* camera_dev = getCameraDevice();
if (camera_dev->isStarted()) {
camera_dev->stopDeliveringFrames();
camera_dev->stopDevice();
}
status_t res = mPreviewWindow.startPreview();
if (res != NO_ERROR) {
return res;
}
/* Make sure camera device is connected. */
if (!camera_dev->isConnected()) {
res = camera_dev->connectDevice();
if (res != NO_ERROR) {
mPreviewWindow.stopPreview();
return res;
}
}
/* Lets see what should we use for frame width, and height. */
int width, height;
res = getConfiguredFrameSize(&width, &height);
if (res != NO_ERROR) {
mPreviewWindow.stopPreview();
return res;
}
uint32_t org_fmt = 0;
res = getConfiguredPixelFormat(&org_fmt);
if (res != NO_ERROR) {
mPreviewWindow.stopPreview();
return res;
}
camera_dev->setPreviewFrameRate(mParameters.getPreviewFrameRate());
ALOGD("Starting camera: %dx%d -> %.4s",
width, height, reinterpret_cast<const char*>(&org_fmt));
res = camera_dev->startDevice(width, height, org_fmt);
if (res != NO_ERROR) {
mPreviewWindow.stopPreview();
return res;
}
res = camera_dev->startDeliveringFrames(false);
if (res != NO_ERROR) {
camera_dev->stopDevice();
mPreviewWindow.stopPreview();
}
return res;
}
status_t EmulatedCamera::doStopPreview()
{
ALOGV("%s", __FUNCTION__);
status_t res = NO_ERROR;
if (mPreviewWindow.isPreviewEnabled()) {
/* Stop the camera. */
if (getCameraDevice()->isStarted()) {
getCameraDevice()->stopDeliveringFrames();
res = getCameraDevice()->stopDevice();
}
if (res == NO_ERROR) {
/* Disable preview as well. */
mPreviewWindow.stopPreview();
}
}
return NO_ERROR;
}
/****************************************************************************
* Private API.
***************************************************************************/
status_t EmulatedCamera::cleanupCamera()
{
status_t res = NO_ERROR;
/* If preview is running - stop it. */
res = doStopPreview();
if (res != NO_ERROR) {
return -res;
}
/* Stop and disconnect the camera device. */
EmulatedCameraDevice* const camera_dev = getCameraDevice();
if (camera_dev != NULL) {
if (camera_dev->isStarted()) {
camera_dev->stopDeliveringFrames();
res = camera_dev->stopDevice();
if (res != NO_ERROR) {
return -res;
}
}
if (camera_dev->isConnected()) {
res = camera_dev->disconnectDevice();
if (res != NO_ERROR) {
return -res;
}
}
}
mCallbackNotifier.cleanupCBNotifier();
/* Re-init the camera settings in case settings were changed */
Initialize();
return NO_ERROR;
}
/****************************************************************************
* Camera API callbacks as defined by camera_device_ops structure.
*
* Callbacks here simply dispatch the calls to an appropriate method inside
* EmulatedCamera instance, defined by the 'dev' parameter.
***************************************************************************/
int EmulatedCamera::set_preview_window(struct camera_device* dev,
struct preview_stream_ops* window)
{
EmulatedCamera* ec = reinterpret_cast<EmulatedCamera*>(dev->priv);
if (ec == NULL) {
ALOGE("%s: Unexpected NULL camera device", __FUNCTION__);
return -EINVAL;
}
return ec->setPreviewWindow(window);
}
void EmulatedCamera::set_callbacks(
struct camera_device* dev,
camera_notify_callback notify_cb,
camera_data_callback data_cb,
camera_data_timestamp_callback data_cb_timestamp,
camera_request_memory get_memory,
void* user)
{
EmulatedCamera* ec = reinterpret_cast<EmulatedCamera*>(dev->priv);
if (ec == NULL) {
ALOGE("%s: Unexpected NULL camera device", __FUNCTION__);
return;
}
ec->setCallbacks(notify_cb, data_cb, data_cb_timestamp, get_memory, user);
}
void EmulatedCamera::enable_msg_type(struct camera_device* dev, int32_t msg_type)
{
EmulatedCamera* ec = reinterpret_cast<EmulatedCamera*>(dev->priv);
if (ec == NULL) {
ALOGE("%s: Unexpected NULL camera device", __FUNCTION__);
return;
}
ec->enableMsgType(msg_type);
}
void EmulatedCamera::disable_msg_type(struct camera_device* dev, int32_t msg_type)
{
EmulatedCamera* ec = reinterpret_cast<EmulatedCamera*>(dev->priv);
if (ec == NULL) {
ALOGE("%s: Unexpected NULL camera device", __FUNCTION__);
return;
}
ec->disableMsgType(msg_type);
}
int EmulatedCamera::msg_type_enabled(struct camera_device* dev, int32_t msg_type)
{
EmulatedCamera* ec = reinterpret_cast<EmulatedCamera*>(dev->priv);
if (ec == NULL) {
ALOGE("%s: Unexpected NULL camera device", __FUNCTION__);
return -EINVAL;
}
return ec->isMsgTypeEnabled(msg_type);
}
int EmulatedCamera::start_preview(struct camera_device* dev)
{
EmulatedCamera* ec = reinterpret_cast<EmulatedCamera*>(dev->priv);
if (ec == NULL) {
ALOGE("%s: Unexpected NULL camera device", __FUNCTION__);
return -EINVAL;
}
return ec->startPreview();
}
void EmulatedCamera::stop_preview(struct camera_device* dev)
{
EmulatedCamera* ec = reinterpret_cast<EmulatedCamera*>(dev->priv);
if (ec == NULL) {
ALOGE("%s: Unexpected NULL camera device", __FUNCTION__);
return;
}
ec->stopPreview();
}
int EmulatedCamera::preview_enabled(struct camera_device* dev)
{
EmulatedCamera* ec = reinterpret_cast<EmulatedCamera*>(dev->priv);
if (ec == NULL) {
ALOGE("%s: Unexpected NULL camera device", __FUNCTION__);
return -EINVAL;
}
return ec->isPreviewEnabled();
}
int EmulatedCamera::store_meta_data_in_buffers(struct camera_device* dev,
int enable)
{
EmulatedCamera* ec = reinterpret_cast<EmulatedCamera*>(dev->priv);
if (ec == NULL) {
ALOGE("%s: Unexpected NULL camera device", __FUNCTION__);
return -EINVAL;
}
return ec->storeMetaDataInBuffers(enable);
}
int EmulatedCamera::start_recording(struct camera_device* dev)
{
EmulatedCamera* ec = reinterpret_cast<EmulatedCamera*>(dev->priv);
if (ec == NULL) {
ALOGE("%s: Unexpected NULL camera device", __FUNCTION__);
return -EINVAL;
}
return ec->startRecording();
}
void EmulatedCamera::stop_recording(struct camera_device* dev)
{
EmulatedCamera* ec = reinterpret_cast<EmulatedCamera*>(dev->priv);
if (ec == NULL) {
ALOGE("%s: Unexpected NULL camera device", __FUNCTION__);
return;
}
ec->stopRecording();
}
int EmulatedCamera::recording_enabled(struct camera_device* dev)
{
EmulatedCamera* ec = reinterpret_cast<EmulatedCamera*>(dev->priv);
if (ec == NULL) {
ALOGE("%s: Unexpected NULL camera device", __FUNCTION__);
return -EINVAL;
}
return ec->isRecordingEnabled();
}
void EmulatedCamera::release_recording_frame(struct camera_device* dev,
const void* opaque)
{
EmulatedCamera* ec = reinterpret_cast<EmulatedCamera*>(dev->priv);
if (ec == NULL) {
ALOGE("%s: Unexpected NULL camera device", __FUNCTION__);
return;
}
ec->releaseRecordingFrame(opaque);
}
int EmulatedCamera::auto_focus(struct camera_device* dev)
{
EmulatedCamera* ec = reinterpret_cast<EmulatedCamera*>(dev->priv);
if (ec == NULL) {
ALOGE("%s: Unexpected NULL camera device", __FUNCTION__);
return -EINVAL;
}
return ec->setAutoFocus();
}
int EmulatedCamera::cancel_auto_focus(struct camera_device* dev)
{
EmulatedCamera* ec = reinterpret_cast<EmulatedCamera*>(dev->priv);
if (ec == NULL) {
ALOGE("%s: Unexpected NULL camera device", __FUNCTION__);
return -EINVAL;
}
return ec->cancelAutoFocus();
}
int EmulatedCamera::take_picture(struct camera_device* dev)
{
EmulatedCamera* ec = reinterpret_cast<EmulatedCamera*>(dev->priv);
if (ec == NULL) {
ALOGE("%s: Unexpected NULL camera device", __FUNCTION__);
return -EINVAL;
}
return ec->takePicture();
}
int EmulatedCamera::cancel_picture(struct camera_device* dev)
{
EmulatedCamera* ec = reinterpret_cast<EmulatedCamera*>(dev->priv);
if (ec == NULL) {
ALOGE("%s: Unexpected NULL camera device", __FUNCTION__);
return -EINVAL;
}
return ec->cancelPicture();
}
int EmulatedCamera::set_parameters(struct camera_device* dev, const char* parms)
{
EmulatedCamera* ec = reinterpret_cast<EmulatedCamera*>(dev->priv);
if (ec == NULL) {
ALOGE("%s: Unexpected NULL camera device", __FUNCTION__);
return -EINVAL;
}
return ec->setParameters(parms);
}
char* EmulatedCamera::get_parameters(struct camera_device* dev)
{
EmulatedCamera* ec = reinterpret_cast<EmulatedCamera*>(dev->priv);
if (ec == NULL) {
ALOGE("%s: Unexpected NULL camera device", __FUNCTION__);
return NULL;
}
return ec->getParameters();
}
void EmulatedCamera::put_parameters(struct camera_device* dev, char* params)
{
EmulatedCamera* ec = reinterpret_cast<EmulatedCamera*>(dev->priv);
if (ec == NULL) {
ALOGE("%s: Unexpected NULL camera device", __FUNCTION__);
return;
}
ec->putParameters(params);
}
int EmulatedCamera::send_command(struct camera_device* dev,
int32_t cmd,
int32_t arg1,
int32_t arg2)
{
EmulatedCamera* ec = reinterpret_cast<EmulatedCamera*>(dev->priv);
if (ec == NULL) {
ALOGE("%s: Unexpected NULL camera device", __FUNCTION__);
return -EINVAL;
}
return ec->sendCommand(cmd, arg1, arg2);
}
void EmulatedCamera::release(struct camera_device* dev)
{
EmulatedCamera* ec = reinterpret_cast<EmulatedCamera*>(dev->priv);
if (ec == NULL) {
ALOGE("%s: Unexpected NULL camera device", __FUNCTION__);
return;
}
ec->releaseCamera();
}
int EmulatedCamera::dump(struct camera_device* dev, int fd)
{
EmulatedCamera* ec = reinterpret_cast<EmulatedCamera*>(dev->priv);
if (ec == NULL) {
ALOGE("%s: Unexpected NULL camera device", __FUNCTION__);
return -EINVAL;
}
return ec->dumpCamera(fd);
}
int EmulatedCamera::close(struct hw_device_t* device)
{
EmulatedCamera* ec =
reinterpret_cast<EmulatedCamera*>(reinterpret_cast<struct camera_device*>(device)->priv);
if (ec == NULL) {
ALOGE("%s: Unexpected NULL camera device", __FUNCTION__);
return -EINVAL;
}
return ec->closeCamera();
}
/****************************************************************************
* Static initializer for the camera callback API
****************************************************************************/
camera_device_ops_t EmulatedCamera::mDeviceOps = {
EmulatedCamera::set_preview_window,
EmulatedCamera::set_callbacks,
EmulatedCamera::enable_msg_type,
EmulatedCamera::disable_msg_type,
EmulatedCamera::msg_type_enabled,
EmulatedCamera::start_preview,
EmulatedCamera::stop_preview,
EmulatedCamera::preview_enabled,
EmulatedCamera::store_meta_data_in_buffers,
EmulatedCamera::start_recording,
EmulatedCamera::stop_recording,
EmulatedCamera::recording_enabled,
EmulatedCamera::release_recording_frame,
EmulatedCamera::auto_focus,
EmulatedCamera::cancel_auto_focus,
EmulatedCamera::take_picture,
EmulatedCamera::cancel_picture,
EmulatedCamera::set_parameters,
EmulatedCamera::get_parameters,
EmulatedCamera::put_parameters,
EmulatedCamera::send_command,
EmulatedCamera::release,
EmulatedCamera::dump
};
/****************************************************************************
* Common keys
***************************************************************************/
const char EmulatedCamera::FACING_KEY[] = "prop-facing";
const char EmulatedCamera::ORIENTATION_KEY[] = "prop-orientation";
const char EmulatedCamera::RECORDING_HINT_KEY[] = "recording-hint";
/****************************************************************************
* Common string values
***************************************************************************/
const char EmulatedCamera::FACING_BACK[] = "back";
const char EmulatedCamera::FACING_FRONT[] = "front";
/****************************************************************************
* Helper routines
***************************************************************************/
static char* AddValue(const char* param, const char* val)
{
const size_t len1 = strlen(param);
const size_t len2 = strlen(val);
char* ret = reinterpret_cast<char*>(malloc(len1 + len2 + 2));
ALOGE_IF(ret == NULL, "%s: Memory failure", __FUNCTION__);
if (ret != NULL) {
memcpy(ret, param, len1);
ret[len1] = ',';
memcpy(ret + len1 + 1, val, len2);
ret[len1 + len2 + 1] = '\0';
}
return ret;
}
/****************************************************************************
* Parameter debugging helpers
***************************************************************************/
#if DEBUG_PARAM
static void PrintParamDiff(const CameraParameters& current,
const char* new_par)
{
char tmp[2048];
const char* wrk = new_par;
/* Divided with ';' */
const char* next = strchr(wrk, ';');
while (next != NULL) {
snprintf(tmp, sizeof(tmp), "%.*s", (int)(intptr_t)(next-wrk), wrk);
/* in the form key=value */
char* val = strchr(tmp, '=');
if (val != NULL) {
*val = '\0'; val++;
const char* in_current = current.get(tmp);
if (in_current != NULL) {
if (strcmp(in_current, val)) {
ALOGD("=== Value changed: %s: %s -> %s", tmp, in_current, val);
}
} else {
ALOGD("+++ New parameter: %s=%s", tmp, val);
}
} else {
ALOGW("No value separator in %s", tmp);
}
wrk = next + 1;
next = strchr(wrk, ';');
}
}
#endif /* DEBUG_PARAM */
}; /* namespace android */