# 流對(duì)齊處理單元-AlignFilterViewer

支持設(shè)備： Gemini 330系列相機(jī)，例如：Gemini G335

功能描述：演示使用SDK進(jìn)行流對(duì)齊演示，顯示對(duì)齊后的圖像，并通過(guò)ESC_KEY鍵退出程序

>本示例基于C High Level API進(jìn)行演示

創(chuàng)建Pipeline及流配置

// Create a pipeline to open the depth stream after connecting the device
pipeline = ob_create_pipeline(&error);
check_error(error);

// Create config to configure the resolution, frame rate, and format of the depth stream
ob_config *config = ob_create_config(&error);
check_error(error);

// Configure the depth stream
ob_stream_profile      *depth_profile = NULL;
ob_stream_profile_list *profiles      = ob_pipeline_get_stream_profile_list(pipeline, OB_SENSOR_DEPTH, &error);
check_error(error);

// Find the corresponding profile according to the specified format, first look for the y16 format
depth_profile = ob_stream_profile_list_get_video_stream_profile(profiles, 640, OB_HEIGHT_ANY, OB_FORMAT_Y16, 30, &error);
// If the specified format is not found, search for the default profile to open the stream
if(error) {
    depth_profile = ob_stream_profile_list_get_profile(profiles, OB_PROFILE_DEFAULT, &error);
    ob_delete_error(error);
    error = nullptr;
}

// enable stream
ob_config_enable_stream(config, depth_profile, &error);
check_error(error);

// Configure the color stream
ob_stream_profile *     color_profile = nullptr;
ob_stream_profile_list *color_rofiles = ob_pipeline_get_stream_profile_list(pipeline, OB_SENSOR_COLOR, &error);
if(error) {
    printf("Current device is not support color sensor!\n");
    exit(EXIT_FAILURE);
}

// Find the corresponding Profile according to the specified format, and choose the RGB888 format first
color_profile = ob_stream_profile_list_get_video_stream_profile(color_rofiles, 1280, OB_HEIGHT_ANY, OB_FORMAT_RGB, 30, &error);
// If the specified format is not found, search for the default Profile to open the stream
if(error) {
    color_profile = ob_stream_profile_list_get_profile(color_rofiles, OB_PROFILE_DEFAULT, &error);
    ob_delete_error(error);
    error = nullptr;
}

// enable stream
ob_config_enable_stream(config, color_profile, &error);
check_error(error);

配置流對(duì)齊方式

/* Config depth align to color or color align to depth.
ob_stream_type align_to_stream = OB_STREAM_DEPTH; */
ob_stream_type align_to_stream = OB_STREAM_COLOR;
ob_filter *    align_filter    = ob_create_align(&error, align_to_stream);

通過(guò)Config，啟動(dòng)Pipeline

// Start the pipeline with config
ob_pipeline_start_with_config(pipeline, config, &error);
check_error(error);

獲取對(duì)齊后的數(shù)據(jù)

ob_frame *new_frame_set = ob_filter_process(align_filter, frameset, &error);
check_error(error);

new_depth_frame = ob_frameset_depth_frame(new_frame_set, &error);
check_error(error);

new_color_frame = ob_frameset_color_frame(new_frame_set, &error);
check_error(error);

釋放資源，退出程序。

ob_delete_filter(align_filter, &error);
check_error(error);

// stop the pipeline
ob_pipeline_stop(pipeline, &error);
check_error(error);

// destroy the window
delete win;

// destroy profile
ob_delete_stream_profile(depth_profile, &error);
check_error(error);

// destroy profile list
ob_delete_stream_profile_list(profiles, &error);
check_error(error);

// destroy profile
ob_delete_stream_profile(color_profile, &error);
check_error(error);

// destroy profile list
ob_delete_stream_profile_list(color_rofiles, &error);
check_error(error);

// destroy the pipeline
ob_delete_pipeline(pipeline, &error);
check_error(error);

預(yù)期輸出：