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FlashCam.cpp
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FlashCam.cpp
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/**********************************************************
Software developed by Hessel van der Molen
Main author Hessel van der Molen (hmolen.science at gmail dot com)
This software is released under BSD license as expressed below
-------------------------------------------------------------------
Copyright (c) 2017, Hessel van der Molen
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
1. Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
3. All advertising materials mentioning features or use of this software
must display the following acknowledgement:
This product includes software developed by Hessel van der Molen
4. None of the names of the author or irs contributors
may be used to endorse or promote products derived from this software
without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY Hessel van der Molen ''AS IS'' AND ANY
EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL AVA BE LIABLE FOR ANY
DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
****************************************************************/
#include "FlashCam.h"
#include "FlashCam_util_mmal.h"
#include "bcm_host.h"
#include "interface/mmal/util/mmal_util.h"
#include "interface/mmal/util/mmal_util_params.h"
#include "interface/mmal/util/mmal_default_components.h"
#include <stdio.h>
#include <sysexits.h>
/*
* Constructor
*/
FlashCam::FlashCam(){
clear();
}
/*
* Destructor
*/
FlashCam::~FlashCam(){
//allow callback/buffer data to be emptied..
sleep(1);
//cleanup.
destroyComponents();
FlashCamPLL::destroy();
vcos_semaphore_delete(&_userdata.sem_capture);
}
void FlashCam::clear() {
if (_active) {
fprintf(stderr, "%s: Cannot clear FlashCam while it is capturing.\n", __func__);
return;
}
if (_initialised) {
//allow callback/buffer data to be emptied..
sleep(1);
//clear old values
destroyComponents();
FlashCamPLL::destroy();
vcos_semaphore_delete(&_userdata.sem_capture);
}
_initialised = false;
_active = false;
FlashCamPLL::init(&_state);
//init with default parameter set;
getDefaultSettings(&_settings);
//disable verbose as it might confuse user.
unsigned int v = _settings.verbose;
_settings.verbose = 0;
//init with default settings
setSettings(&_settings); //implicitly resets/configures camera
//reset verbose
_settings.verbose = v;
}
int FlashCam::resetCamera() {
int status;
if (_active) {
fprintf(stderr, "%s: Cannot reset camera while it is capturing.\n", __func__);
return FlashCamMMAL::mmal_to_int(MMAL_EINVAL);
}
if (_settings.verbose)
fprintf(stdout, "%s: (re)setting/initializing components.\n", __func__);
// setup / reset camera (return upon error)
if (status = setupComponents())
return status;
if (_settings.verbose)
fprintf(stdout, "%s: (re)setting/initializing mode.\n", __func__);
// enable / reset selected mode
if (status = setSettingCaptureMode( _settings.mode ))
return status;
// update parameters
if (status = setParams(&_params))
return status;
if (_settings.verbose)
fprintf(stdout, "%s: Succes.\n", __func__);
//succes
return FlashCamMMAL::mmal_to_int(MMAL_SUCCESS);
}
// setup the camera with specified settings
int FlashCam::setupComponents() {
// Is camera active?
if (_active) {
fprintf(stderr, "%s: Cannot reset camera while it is capturing.\n", __func__);
return FlashCamMMAL::mmal_to_int(MMAL_EINVAL);
}
// Only update these settings when initialising for the first time
if (!_initialised) {
//print that we are starting
if (_settings.verbose)
fprintf(stdout, "\n FlashCam Version: %s\n\n", FLASHCAM_VERSION_STRING);
bcm_host_init();
//register to VCOS for logging
vcos_log_register("FlashCam", VCOS_LOG_CATEGORY);
// create & init semaphore
if (vcos_semaphore_create(&_userdata.sem_capture, "FlashCam_sem_captured", 0) != VCOS_SUCCESS) {
vcos_log_error("%s: Failed to create semaphore", __func__);
return FlashCamMMAL::mmal_to_int(MMAL_EINVAL);
}
//setup default camera params
getDefaultParams(&_params);
}
//clear current setup
destroyComponents();
// init/reset private variables
//_initialised : set at the end of this function.
//_active = false : initialised by constructor. Set when camera is recording.
//_params = default : initialised by constructor. Updated by User.
//_settings : should be set before calling setupComponents().
//_camera_component : (re)set by destroyComponents()
//_preview_component : (re)set by destroyComponents()
//_preview_connection : (re)set by destroyComponents()
//_camera_pool : (re)set by destroyComponents()
//_framebuffer : (re)set by destroyComponents()
//_opengl_queue : (re)set by destroyComponents()
//set userdata
_userdata.params = &_params;
_userdata.settings = &_settings;
_userdata.camera_pool = NULL;
_userdata.framebuffer = NULL;
_userdata.framebuffer_size = 0;
_userdata.framebuffer_idx = 0;
_userdata.callback = NULL;
#ifdef BUILD_FLASHCAM_WITH_OPENGL
_userdata.callback_egl = NULL;
_userdata.opengl_queue = NULL;
FlashCamOpenGL::init(&_state);
#endif
//Status flags
MMAL_STATUS_T status = MMAL_SUCCESS;
//setup camera
// - internally sets:
// _camera_component
// _camera_pool
// _userdata.camera_pool
// _userdata.framebuffer
// _userdata.framebuffer_size
if ((status = setupComponentCamera()) != MMAL_SUCCESS) {
vcos_log_error("%s: Failed to create camera component", __func__);
destroyComponents();
return FlashCamMMAL::mmal_to_int(status);
}
//setup preview (nullsink!)
// -> But we need it as it is used for measurements such as awb
// internally sets:
// _preview_component
if ((status = setupComponentPreview()) != MMAL_SUCCESS) {
vcos_log_error("%s: Failed to create preview component", __func__);
destroyComponents();
return FlashCamMMAL::mmal_to_int(status);
}
if (_settings.verbose)
fprintf(stdout, "%s: Starting component connection stage\n", __func__);
//get ports
MMAL_PORT_T *preview_port = _camera_component->output[MMAL_CAMERA_PREVIEW_PORT];
MMAL_PORT_T *preview_port_input = _preview_component->input[0];
// Connect preview
if ((status = connectPorts(preview_port, preview_port_input, &_preview_connection)) != MMAL_SUCCESS) {
vcos_log_error("%s: Failed to connect preview port", __func__);
destroyComponents();
return FlashCamMMAL::mmal_to_int(status);
}
if (_settings.verbose)
fprintf(stdout, "%s: Finished setup\n", __func__);
_initialised = true;
return EX_OK;
}
//Camera setup function
MMAL_STATUS_T FlashCam::setupComponentCamera() {
MMAL_STATUS_T status;
// Create Component
if ((status = mmal_component_create(MMAL_COMPONENT_DEFAULT_CAMERA, &_camera_component)) != MMAL_SUCCESS) {
vcos_log_error("%s: Failed to create camera component", __func__);
destroyComponents();
return status;
}
// Select Camera
if ( setCameraNum(_params.cameranum) ) {
vcos_log_error("%s: Could not select camera %d", __func__, _params.cameranum);
destroyComponents();
return MMAL_EINVAL;
}
// Validate outputs are available
if (!_camera_component->output_num){
vcos_log_error("%s: Camera doesn't have output ports", __func__);
destroyComponents();
return MMAL_EINVAL;
}
// Do we want setting-update messages?
if (setChangeEventRequest(MMAL_PARAMETER_CAMERA_SETTINGS, _settings.update)) {
vcos_log_error("%s: No camera settings events", __func__);
}
// Enable the camera, and tell it its control callback function
if ((status = mmal_port_enable(_camera_component->control, FlashCam::control_callback)) != MMAL_SUCCESS ) {
vcos_log_error("%s: Unable to enable control port (%u)", __func__, status);
destroyComponents();
return status;
}
// Set sensormode
if ( setSensorMode(_settings.sensormode) ) {
vcos_log_error("%s: Could not set sensormode %d", __func__, _settings.sensormode);
destroyComponents();
return MMAL_EINVAL;
}
// Setup ports
MMAL_PORT_T *preview_port = _camera_component->output[MMAL_CAMERA_PREVIEW_PORT];
MMAL_PORT_T *video_port = _camera_component->output[MMAL_CAMERA_VIDEO_PORT ];
MMAL_PORT_T *capture_port = _camera_component->output[MMAL_CAMERA_CAPTURE_PORT];
// Align height/width
_settings.width = VCOS_ALIGN_UP(_settings.width , 32);
_settings.height = VCOS_ALIGN_UP(_settings.height, 16);
if (_settings.verbose)
fprintf(stdout, "%s: Aligned image size: %d x %d (w x h) \n" , __func__, _settings.width , _settings.height);
// setup the camera configuration
MMAL_PARAMETER_CAMERA_CONFIG_T cam_config =
{
{ MMAL_PARAMETER_CAMERA_CONFIG, sizeof(cam_config) },
.max_stills_w = _settings.width,
.max_stills_h = _settings.height,
.stills_yuv422 = 0,
.one_shot_stills = 1,
.max_preview_video_w = _settings.width,
.max_preview_video_h = _settings.height,
.num_preview_video_frames = 3,
.stills_capture_circular_buffer_height = 0,
.fast_preview_resume = 0,
.use_stc_timestamp = MMAL_PARAM_TIMESTAMP_MODE_RAW_STC
};
if ( setCameraConfig( &cam_config ) ) {
vcos_log_error("%s: Could not setup camera", __func__);
destroyComponents();
return MMAL_EINVAL;
}
// setup port-formats
MMAL_ES_FORMAT_T *format = preview_port->format;
//Preview format
format->encoding = MMAL_ENCODING_OPAQUE;
format->encoding_variant = MMAL_ENCODING_I420;
format->es->video.width = _settings.width;
format->es->video.height = _settings.height;
format->es->video.crop.x = 0;
format->es->video.crop.y = 0;
format->es->video.crop.width = _settings.width;
format->es->video.crop.height = _settings.height;
format->es->video.frame_rate.num = PREVIEW_FRAME_RATE_NUM;
format->es->video.frame_rate.den = PREVIEW_FRAME_RATE_DEN;
//Update preview-port with set format
if ((status = mmal_port_format_commit(preview_port)) != MMAL_SUCCESS ) {
vcos_log_error("%s: Preview format couldn't be set (%u)", __func__, status);
destroyComponents();
return status;
}
//Video format ==> same as Preview, except for encoding (YUV!)
format = video_port->format;
if (_settings.opengl_enabled) {
//For openGL we require the OPAQUE (= special GPU format) encoding.
format->encoding = MMAL_ENCODING_OPAQUE;
} else {
format->encoding = MMAL_ENCODING_I420;
}
format->encoding_variant = MMAL_ENCODING_I420;
format->es->video.width = _settings.width;
format->es->video.height = _settings.height;
format->es->video.crop.x = 0;
format->es->video.crop.y = 0;
format->es->video.crop.width = _settings.width;
format->es->video.crop.height = _settings.height;
format->es->video.frame_rate.num = VIDEO_FRAME_RATE_NUM;
format->es->video.frame_rate.den = VIDEO_FRAME_RATE_DEN;
#ifdef BUILD_FLASHCAM_WITH_OPENGL
/* Enable ZERO_COPY mode on the preview port which instructs MMAL to only
* pass the 4-byte opaque buffer handle instead of the contents of the opaque
* buffer.
* The opaque handle is resolved on VideoCore by the GL driver when the EGL
* image is created.
*/
if (_settings.opengl_enabled) {
if ((status = mmal_port_parameter_set_boolean(video_port, MMAL_PARAMETER_ZERO_COPY, MMAL_TRUE)) != MMAL_SUCCESS ) {
vcos_log_error("%s: Failed to enable zero copy on video port (%u)", __func__, status);
destroyComponents();
return status;
}
}
#endif
//Update capture-port with set format
if ((status = mmal_port_format_commit(video_port)) != MMAL_SUCCESS ) {
vcos_log_error("%s: Video format couldn't be set (%u)", __func__, status);
destroyComponents();
return status;
}
//Capture format ==> same as Preview, except for encoding (YUV!)
format = capture_port->format;
format->encoding = MMAL_ENCODING_I420;
format->encoding_variant = MMAL_ENCODING_I420;
format->es->video.width = _settings.width;
format->es->video.height = _settings.height;
format->es->video.crop.x = 0;
format->es->video.crop.y = 0;
format->es->video.crop.width = _settings.width;
format->es->video.crop.height = _settings.height;
format->es->video.frame_rate.num = CAPTURE_FRAME_RATE_NUM;
format->es->video.frame_rate.den = CAPTURE_FRAME_RATE_DEN;
//Update capture-port with set format
if ((status = mmal_port_format_commit(capture_port)) != MMAL_SUCCESS ) {
vcos_log_error("%s: Capture format couldn't be set (%u)", __func__, status);
destroyComponents();
return status;
}
//Enable camera
if ((status = mmal_component_enable(_camera_component)) != MMAL_SUCCESS ) {
vcos_log_error("%s: Camera component couldn't be enabled (%u)", __func__, status);
destroyComponents();
return status;
}
// YUV-data framesize
_userdata.framebuffer_size = VCOS_ALIGN_UP(_settings.width * _settings.height * 1.5, 32);
//create buffer for image
_framebuffer = new unsigned char[_userdata.framebuffer_size];
if (!_framebuffer) {
vcos_log_error("%s: Failed to allocate image buffer", __func__);
destroyComponents();
return MMAL_ENOMEM;
}
//update userdata with framebuffer
_userdata.framebuffer = _framebuffer;
if (_settings.verbose)
fprintf(stdout, "%s: Success.\n", __func__);
return MMAL_SUCCESS;
}
//Preview setup functions
MMAL_STATUS_T FlashCam::setupComponentPreview() {
MMAL_STATUS_T status;
//set nullsink
if ((status = mmal_component_create("vc.null_sink", &_preview_component)) != MMAL_SUCCESS) {
vcos_log_error("%s: Unable to create null sink component (%u)", __func__, status);
destroyComponents();
return status;
}
// Enable component
if ((status = mmal_component_enable( _preview_component )) != MMAL_SUCCESS) {
vcos_log_error("%s: Unable to enable preview/null sink component (%u)", __func__, status);
destroyComponents();
return status;
}
return MMAL_SUCCESS;
}
void FlashCam::destroyComponents() {
if (_settings.verbose)
fprintf(stdout, "%s: Clearing components\n", __func__);
//reset init flag
_initialised = false;
// Disable connections
if (_preview_connection) {
mmal_connection_destroy(_preview_connection);
}
// Disable ports
if (_preview_component) {
mmal_component_disable( _preview_component );
mmal_component_destroy( _preview_component );
}
if (_camera_component) {
mmal_component_disable( _camera_component );
mmal_component_destroy( _camera_component );
}
// Disable pool
if (_camera_pool) {
mmal_pool_destroy( _camera_pool );
}
// Clear buffer
if (_framebuffer)
delete[] _framebuffer;
#ifdef BUILD_FLASHCAM_WITH_OPENGL
if (_opengl_queue) {
mmal_queue_destroy( _opengl_queue );
_opengl_queue = NULL;
}
FlashCamOpenGL::destroy();
#endif
// Reset pointers
_preview_connection = NULL;
_preview_component = NULL;
_camera_component = NULL;
_camera_pool = NULL;
_framebuffer = NULL;
if (_settings.verbose)
fprintf(stdout, "%s: Components cleared\n", __func__);
}
/*
* void FlashCam::control_callback(MMAL_PORT_T *port, MMAL_BUFFER_HEADER_T *buffer)
* Callback function for control-events
*/
void FlashCam::control_callback(MMAL_PORT_T *port, MMAL_BUFFER_HEADER_T *buffer) {
//fprintf(stderr, "Camera control callback cmd=0x%08x", buffer->cmd);
//check received event
if (buffer->cmd == MMAL_EVENT_PARAMETER_CHANGED) {
MMAL_EVENT_PARAMETER_CHANGED_T *param = (MMAL_EVENT_PARAMETER_CHANGED_T *)buffer->data;
switch (param->hdr.id) {
case MMAL_PARAMETER_CAMERA_SETTINGS:
{
MMAL_PARAMETER_CAMERA_SETTINGS_T *settings = (MMAL_PARAMETER_CAMERA_SETTINGS_T*)param;
vcos_log_error("%s: Exposure now %u, analog gain %u/%u, digital gain %u/%u",
__func__, settings->exposure,
settings->analog_gain.num, settings->analog_gain.den,
settings->digital_gain.num, settings->digital_gain.den);
vcos_log_error("%s: AWB R=%u/%u, B=%u/%u", __func__,
settings->awb_red_gain.num, settings->awb_red_gain.den,
settings->awb_blue_gain.num, settings->awb_blue_gain.den
);
}
break;
default:
{
vcos_log_error("%s: Received unexpected updated: id=%d", __func__, param->hdr.id);
}
break;
}
} else if (buffer->cmd == MMAL_EVENT_ERROR) {
vcos_log_error("%s: No data received from sensor. Check all connections, including the Sunny one on the camera board", __func__);
} else {
vcos_log_error("%s: Received unexpected camera control callback event, 0x%08x", __func__, buffer->cmd);
}
//release header
mmal_buffer_header_release(buffer);
}
/*
* void FlashCam::control_callback(MMAL_PORT_T *port, MMAL_BUFFER_HEADER_T *buffer)
* Callback function for buffer-events (that is, camera returned an image)
*/
void FlashCam::buffer_callback(MMAL_PORT_T *port, MMAL_BUFFER_HEADER_T *buffer) {
int abort = 0; //flag for detecting if we need to abort due to error
int complete = 0; //flag for detecting if a full frame is recieved
int discard = 0; //flag for detecting if we need to discard buffer
int max_idx = 0; //flag for detecting if _framebuffer is out of memory
uint64_t presentationtime = 0;
//retrieve userdata
FLASHCAM_PORT_USERDATA_T *userdata = (FLASHCAM_PORT_USERDATA_T *)port->userdata;
//is userdata properly set?
if (userdata) {
// Are there bytes to write?
if (buffer->length) {
bool pll_state = false;
#ifdef BUILD_FLASHCAM_WITH_PLL
FlashCamPLL::update(buffer->pts, &pll_state);
#endif
//OpenGL processing?
if (userdata->settings->opengl_enabled) {
#ifdef BUILD_FLASHCAM_WITH_OPENGL
unsigned int length = mmal_queue_length(userdata->opengl_queue);
//fprintf(stdout, "%s: QueueSize - %d (%d) \n", __func__, length, port->buffer_num);
//push to queue, unlock buffer, update PLL and return.
if ( length + 1 < port->buffer_num) {
// set FlashCam data in Buffer.
FLASHCAM_OPENGL_BUF_T* glb = FlashCamOpenGL::getOpenGLBuffer();
if (glb != NULL) {
glb->pll_state = pll_state;
glb->buffer = buffer;
} else {
vcos_log_error("%s: No OpenGL buffer available in pool." , __func__);
}
//push buffer to OpenGL queue for processing
mmal_queue_put(userdata->opengl_queue, &glb->glb_mmal_buffer);
//fprintf(stdout, "%s: Posting...\n", __func__);
vcos_semaphore_post(&(userdata->sem_capture));
//buffer released by OpenGL worker.
return;
}
fprintf(stdout, "%s: DISCARD! \n", __func__);
#else
vcos_log_error("%s: OpenGL Support not build." , __func__);
#endif
discard = 1;
// `normal` processing
} else {
//lock buffer --> callback is async!
mmal_buffer_header_mem_lock(buffer);
// We are decoding YUV packages
// - 4/6 = Y
// - 1/6 = U
// - 1/6 = V
unsigned int length_Y = (buffer->length << 2) / 6;
unsigned int length_U = (buffer->length - length_Y) >> 1;
unsigned int length_V = length_U;
unsigned int offset_Y = userdata->framebuffer_idx;
unsigned int offset_U = userdata->settings->height * userdata->settings->width * 1.00 + (userdata->framebuffer_idx >> 2);
unsigned int offset_V = userdata->settings->height * userdata->settings->width * 1.25 + (userdata->framebuffer_idx >> 2);
//max index to be written
max_idx = offset_V + length_V;
//does it fit in buffer?
if ( max_idx > userdata->framebuffer_size ) {
vcos_log_error("%s: Framebuffer full (%d > %d) - aborting.." , __func__, max_idx , userdata->framebuffer_size );
abort = 1;
} else {
//copy Y
memcpy ( &userdata->framebuffer[offset_Y] , &buffer->data[0] , length_Y );
//copy U
memcpy ( &userdata->framebuffer[offset_U] , &buffer->data[length_Y] , length_U );
//copy V
memcpy ( &userdata->framebuffer[offset_V] , &buffer->data[length_Y + length_U] , length_V );
//update index
userdata->framebuffer_idx += length_Y;
}
//done with data..
mmal_buffer_header_mem_unlock(buffer);
}
}
if (discard == 0) {
// Check end of frame or error
if (buffer->flags & MMAL_BUFFER_HEADER_FLAG_TRANSMISSION_FAILED)
abort = 1;
if (buffer->flags & MMAL_BUFFER_HEADER_FLAG_FRAME_END)
complete = 1;
presentationtime = buffer->pts;
}
} else {
vcos_log_error("%s: Received a camera still buffer callback with no state", __func__);
}
// release buffer back to the pool
mmal_buffer_header_release(buffer);
// and send one back to the port (if still open)
if (port->is_enabled) {
MMAL_STATUS_T status;
MMAL_BUFFER_HEADER_T *new_buffer = mmal_queue_get(userdata->camera_pool->queue);
// and back to the port from there.
if (new_buffer)
status = mmal_port_send_buffer(port, new_buffer);
if (!new_buffer || status != MMAL_SUCCESS)
vcos_log_error("%s: Unable to return the buffer to the camera still port", __func__);
}
if (discard == 0) {
//post that we are done
if (abort) {
vcos_semaphore_post(&(userdata->sem_capture));
} else if (complete) {
if (userdata->callback)
userdata->callback( userdata->framebuffer , userdata->settings->width , userdata->settings->height);
//release semaphore
userdata->framebuffer_idx = 0;
vcos_semaphore_post(&(userdata->sem_capture));
}
}
}
// Setup connection between Input/Output ports
MMAL_STATUS_T FlashCam::connectPorts(MMAL_PORT_T *output_port, MMAL_PORT_T *input_port, MMAL_CONNECTION_T **connection) {
MMAL_STATUS_T status = mmal_connection_create(connection, output_port, input_port, MMAL_CONNECTION_FLAG_TUNNELLING | MMAL_CONNECTION_FLAG_ALLOCATION_ON_INPUT);
if (status == MMAL_SUCCESS) {
if ((status = mmal_connection_enable(*connection)) != MMAL_SUCCESS)
mmal_connection_destroy(*connection);
}
return status;
}
/*
* int FlashCam::capture( void )
*
* Capture an image
*
*/
int FlashCam::startCapture() {
int status;
if (!_initialised) {
fprintf(stderr, "%s: Camera not initialised.\n", __func__);
return FlashCamMMAL::mmal_to_int(MMAL_EINVAL);
}
// Is camera active?
if (_active) {
fprintf(stderr, "%s: Camera already capturing.\n", __func__);
return FlashCamMMAL::mmal_to_int(MMAL_EINVAL);
}
if (_settings.verbose)
fprintf(stdout, "%s: Starting capture\n", __func__);
//update state
_state.settings = &_settings;
_state.params = &_params;
_state.userdata = &_userdata;
if (_settings.mode == FLASHCAM_MODE_VIDEO) {
_state.port = _camera_component->output[MMAL_CAMERA_VIDEO_PORT];
} else if ( _settings.mode = FLASHCAM_MODE_CAPTURE ) {
_state.port = _camera_component->output[MMAL_CAMERA_CAPTURE_PORT];
} else {
fprintf(stderr, "%s: Cannot start camera. Unknown mode (%u)\n", __func__, _settings.mode);
return FlashCamMMAL::mmal_to_int(MMAL_EINVAL);
}
#ifdef BUILD_FLASHCAM_WITH_OPENGL
//start EGL thread for processing
if (_settings.opengl_enabled) {
FlashCamOpenGL::start();
}
#endif
#ifdef BUILD_FLASHCAM_WITH_PLL
if (_settings.mode == FLASHCAM_MODE_VIDEO) {
if (FlashCamPLL::start()) {
fprintf(stderr, "%s: PLL cannot be started.\n", __func__);
return FlashCamMMAL::mmal_to_int(MMAL_EINVAL);
}
}
#endif
//start camera
if (status = setCapture(_state.port, 1)) {
vcos_log_error("%s: Failed to start video stream", __func__);
return status;
}
_active = true;
// When in capturemode: Wait for capture to complete
if ( _settings.mode == FLASHCAM_MODE_CAPTURE ) {
vcos_semaphore_wait(&_userdata.sem_capture);
_active = false;
}
if (_settings.verbose)
fprintf(stdout, "%s: Success\n", __func__);
return FlashCamMMAL::mmal_to_int(MMAL_SUCCESS);
}
int FlashCam::stopCapture() {
int status;
if (!_initialised) {
fprintf(stderr, "%s: Camera not initialised.\n", __func__);
return FlashCamMMAL::mmal_to_int(MMAL_EINVAL);
}
// Is camera active?
if (!_active) {
fprintf(stderr, "%s: Camera not capturing.\n", __func__);
return FlashCamMMAL::mmal_to_int(MMAL_EINVAL);
}
if (_settings.verbose)
fprintf(stdout, "%s: Stopping stream.\n", __func__);
if (_settings.mode == FLASHCAM_MODE_VIDEO) {
//shutdown PLL before camera, as PLL has some internal Camera dependencies.
// Shutting down camera will crash PLL.
#ifdef BUILD_FLASHCAM_WITH_PLL
if (FlashCamPLL::stop()) {
fprintf(stderr, "%s: PLL cannot be stopped.\n", __func__);
return FlashCamMMAL::mmal_to_int(MMAL_EINVAL);
}
#endif
//stop video
if (status = setCapture(_camera_component->output[MMAL_CAMERA_VIDEO_PORT], 0)) {
vcos_log_error("%s: Failed to stop camera", __func__);
return status;
}
} else if ( _settings.mode = FLASHCAM_MODE_CAPTURE ) {
//stop capture
if (status = setCapture(_camera_component->output[MMAL_CAMERA_CAPTURE_PORT], 0)) {
vcos_log_error("%s: Failed to stop camera", __func__);
return status;
}
} else {
//unknown mode..
fprintf(stderr, "%s: Cannot stop camera. Unknown mode (%u)\n", __func__, _settings.mode);
return FlashCamMMAL::mmal_to_int(MMAL_EINVAL);
}
#ifdef BUILD_FLASHCAM_WITH_OPENGL
//Stop EGL thread
// This needs to be done after shutting down the camera,
// ensuring that pending frames/buffers are processed
// and pushed to the appropiate inter-thread queues.
// Sleeping is required to provide all async mmal-related systems to terminate.
usleep(1000000);
FlashCamOpenGL::stop();
#endif
//camera inactive
_active = false;
if (_settings.verbose)
fprintf(stdout, "%s: Success\n", __func__);
return FlashCamMMAL::mmal_to_int(MMAL_SUCCESS);
}
void FlashCam::setFrameCallback(FLASHCAM_CALLBACK_T callback) {
if (_active) return; //no changer/reset while in capturemode
_userdata.callback = callback;
}
#ifdef BUILD_FLASHCAM_WITH_OPENGL
void FlashCam::setFrameCallback(FLASHCAM_CALLBACK_OPENGL_T callback) {
if (_active) return; //no changer/reset while in capturemode
_userdata.callback_egl = callback;
}
#endif
void FlashCam::resetFrameCallback() {
if (_active) return; //no changer/reset while in capturemode
_userdata.callback = NULL;
#ifdef BUILD_FLASHCAM_WITH_OPENGL
_userdata.callback_egl = NULL;
#endif
}
int FlashCam::getGPUtime(uint64_t *us) {
*us = 0;
if (_state.port && _state.port->is_enabled) {
MMAL_STATUS_T status = mmal_port_parameter_get_uint64(_state.port, MMAL_PARAMETER_SYSTEM_TIME, us);
return FlashCamMMAL::mmal_to_int(status);
}
return FlashCamMMAL::mmal_to_int(MMAL_ENOTREADY);
}
/* SETTING MANAGEMENT */
void FlashCam::getDefaultSettings(FLASHCAM_SETTINGS_T *settings) {
settings->width = 640;
settings->height = 480;
settings->verbose = 1;
settings->update = 0;
settings->mode = FLASHCAM_MODE_CAPTURE;
settings->opengl_enabled = 0;
#ifdef BUILD_FLASHCAM_WITH_PLL
FlashCamPLL::getDefaultSettings(settings);
#endif
}
void FlashCam::printSettings(FLASHCAM_SETTINGS_T *settings) {
fprintf(stdout, "Width : %d\n", settings->width);
fprintf(stdout, "Height : %d\n", settings->height);
fprintf(stdout, "Verbose : %d\n", settings->verbose);
fprintf(stdout, "Update : %d\n", settings->update);
fprintf(stdout, "Camera-Mode : %d\n", settings->mode);
fprintf(stdout, "OpenGL : %d\n", settings->opengl_enabled);
#ifdef BUILD_FLASHCAM_WITH_PLL
FlashCamPLL::printSettings(settings);
#endif
}
#ifdef PLLTUNE
void FlashCam::getInternalState( FLASHCAM_INTERNAL_STATE_T** state ) {
*state = &_state;
}
#endif
int FlashCam::setSettings(FLASHCAM_SETTINGS_T *settings) {
//update settings
memcpy(&_settings, settings, sizeof(FLASHCAM_SETTINGS_T));
if (_settings.verbose)
fprintf(stdout, "%s: (re)setting camera.\n", __func__);
//reset camera
return resetCamera();
}
int FlashCam::getSettings(FLASHCAM_SETTINGS_T *settings) {
memcpy(settings, &_settings, sizeof(FLASHCAM_SETTINGS_T));
}
//To update size we need to reset & re-initialise all components
int FlashCam::setSettingSize( unsigned int width, unsigned int height ) {
//update settings
_settings.width = width;
_settings.height = height;
if (_settings.verbose)
fprintf(stdout, "%s: Updating size to: %u x %u (w x h)\n", __func__, width, height);
//reset camera
return resetCamera();
}
int FlashCam::getSettingSize( unsigned int *width, unsigned int *height ) {
*width = _settings.width;
*height = _settings.height;
return FlashCamMMAL::mmal_to_int(MMAL_SUCCESS);
}
int FlashCam::setSettingVerbose( int verbose ) {
_settings.verbose = verbose;
return FlashCamMMAL::mmal_to_int(MMAL_SUCCESS);
}
int FlashCam::getSettingVerbose( int *verbose ) {
*verbose = _settings.verbose;
return FlashCamMMAL::mmal_to_int(MMAL_SUCCESS);
}
int FlashCam::setSettingUpdate( int update ) {
_settings.update = update;
return setChangeEventRequest(MMAL_PARAMETER_CAMERA_SETTINGS, _settings.update);
}
int FlashCam::getSettingUpdate( int *update ) {
*update = _settings.update;
return FlashCamMMAL::mmal_to_int(MMAL_SUCCESS);
}
int FlashCam::setSettingCaptureMode( FLASHCAM_MODE_T mode ) {
MMAL_STATUS_T status;
// Is camera active?
if (_active) {
fprintf(stderr, "%s: Cannot change camera mode while being in use\n", __func__);
return FlashCamMMAL::mmal_to_int(MMAL_EINVAL);
}
// Is camera initialised?
if (!_initialised) {
fprintf(stderr, "%s: Components not initialised\n", __func__);
return FlashCamMMAL::mmal_to_int(MMAL_EINVAL);
}
_settings.mode = mode;
//Setup userdata / camera
MMAL_PORT_T *old_port = NULL;
MMAL_PORT_T *new_port = NULL;
if (_settings.mode == FLASHCAM_MODE_VIDEO) {
//video mode..
if (_settings.verbose)
fprintf(stdout, "%s: Enabling video-mode.\n", __func__);
new_port = _camera_component->output[MMAL_CAMERA_VIDEO_PORT];
old_port = _camera_component->output[MMAL_CAMERA_CAPTURE_PORT];
//set buffer sizes
if (new_port->buffer_size < new_port->buffer_size_min)
new_port->buffer_size = new_port->buffer_size_min;