PeterBee97 commented on code in PR #1449: URL: https://github.com/apache/nuttx-apps/pull/1449#discussion_r1041706056
########## include/system/nxcamera.h: ########## @@ -0,0 +1,285 @@ +/**************************************************************************** + * apps/include/system/nxcamera.h + * + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. The + * ASF licenses this file to you 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. + * + ****************************************************************************/ + +#ifndef __APPS_INCLUDE_SYSTEM_NXCAMERA_H +#define __APPS_INCLUDE_SYSTEM_NXCAMERA_H + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#include <nuttx/config.h> + +#include <nuttx/video/video.h> +#include <nuttx/video/fb.h> +#include <mqueue.h> +#include <pthread.h> +#include <semaphore.h> + +/**************************************************************************** + * Pre-processor Definitions + ****************************************************************************/ + +/* Standard Video Message Queue message IDs */ + +#define VIDEO_MSG_NONE 0 +#define VIDEO_MSG_DEQUEUE 1 +#define VIDEO_MSG_START 2 +#define VIDEO_MSG_STOP 3 +#define VIDEO_MSG_PAUSE 4 +#define VIDEO_MSG_RESUME 5 +#define VIDEO_MSG_DATA_REQUEST 6 +#define VIDEO_MSG_ENQUEUE 7 +#define VIDEO_MSG_COMPLETE 8 +#define VIDEO_MSG_WAKEUP 9 +#define VIDEO_MSG_COMMAND 10 +#define VIDEO_MSG_SLIENCE 11 +#define VIDEO_MSG_USER 64 + +/**************************************************************************** + * Public Type Declarations + ****************************************************************************/ + +/* This structure describes the internal state of the nxcamera */ + +struct nxcamera_s +{ + int loopstate; /* Current looper test state */ + int capture_fd; /* File descriptor of active + * capture device */ +#ifdef CONFIG_NXCAMERA_INCLUDE_PREFERRED_DEVICE + char capturedev[CONFIG_NAME_MAX]; /* Preferred capture device */ +#endif + int display_fd; /* File descriptor of active + * display device */ + char displaydev[CONFIG_NAME_MAX]; /* Display framebuffer device */ + struct fb_planeinfo_s display_pinfo; /* Display plane info */ + char ovideopath[CONFIG_NAME_MAX]; /* Output video file path */ + char oimagepath[CONFIG_NAME_MAX]; /* Output image file path */ + int crefs; /* Number of references */ + sem_t sem; /* Thread sync semaphore */ + char mqname[14]; /* Name of display message queue */ + mqd_t mq; /* Message queue for the + * loopthread */ + pthread_t loop_id; /* Thread ID of the loopthread */ + v4l2_format_t fmt; /* Buffer format */ + size_t nbuffers; /* Number of buffers */ + FAR size_t *buf_sizes; /* Buffer lengths */ + FAR uint8_t **bufs; /* Buffer pointers */ +}; + +struct video_msg_s +{ + uint16_t msg_id; /* Message ID */ + union + { + FAR void *ptr; /* Buffer being dequeued */ + uint32_t data; /* Message data */ + } u; +}; + +/**************************************************************************** + * Public Data + ****************************************************************************/ + +#ifdef __cplusplus +#define EXTERN extern "C" +extern "C" +{ +#else +#define EXTERN extern +#endif + +/**************************************************************************** + * Public Function Prototypes + ****************************************************************************/ + +/**************************************************************************** + * Name: nxcamera_create + * + * Allocates and Initializes a nxcamera context that is passed to all + * nxcamera routines. The looper MUST be destroyed using the + * nxcamera_destroy() routine since the context is reference counted. + * The context can be used in a mode where the caller creates the + * context, starts a looping, and then forgets about the context + * and it will self free. This is because the nxcamera_stream + * will also create a reference to the context, so the client calling + * nxcamera_destroy() won't actually de-allocate anything. The freeing + * will occur after the loopthread has completed. + * + * Alternately, the caller can create the object and hold on to it, then + * the context will persist until the original creator destroys it. + * + * Input Parameters: None + * + * Returned Value: + * Pointer to created nxcamera context or NULL if error. + ****************************************************************************/ + +FAR struct nxcamera_s *nxcamera_create(void); + +/**************************************************************************** + * Name: nxcamera_release + * + * Reduces the reference count to the looper and if it reaches zero, + * frees all memory used by the context. + * + * Input Parameters: + * pcam Pointer to the nxcamera context + * + * Returned Value: + * None + * + ****************************************************************************/ + +void nxcamera_release(FAR struct nxcamera_s *pcam); + +/**************************************************************************** + * Name: nxcamera_reference + * + * Increments the reference count to the looper. + * + * Input Parameters: + * pcam Pointer to the nxcamera context + * + * Returned Value: + * None + * + ****************************************************************************/ + +void nxcamera_reference(FAR struct nxcamera_s *pcam); + +/**************************************************************************** + * Name: nxcamera_stream + * + * nxcamera_stream() tries to capture and then display the raw data using + * the Video system. If a capture device is specified, it will try to use + * that device. + * + * Input: + * pcam Pointer to the initialized Looper context + * width Capture frame width + * height Capture frame height + * framerate Capture frame rate + * format Capture frame pixel format + * + * Returns: + * OK Video is being streamed + * -EBUSY Capture device is busy + * -ENOSYS No supported video format found + * -ENODEV No video capture or framebuffer device suitable + * + ****************************************************************************/ + +int nxcamera_stream(FAR struct nxcamera_s *pcam, + uint16_t width, uint16_t height, + uint32_t framerate, uint32_t format); Review Comment: done ########## system/nxcamera/nxcamera.c: ########## @@ -0,0 +1,905 @@ +/**************************************************************************** + * apps/system/nxcamera/nxcamera.c + * + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. The + * ASF licenses this file to you 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. + * + ****************************************************************************/ + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#include <nuttx/config.h> + +#include <assert.h> +#include <debug.h> +#include <dirent.h> +#include <errno.h> +#include <fcntl.h> +#include <pthread.h> +#include <stdbool.h> +#include <stdint.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> + +#include <nuttx/queue.h> +#include <nuttx/video/video.h> +#include <nuttx/video/fb.h> +#include <sys/ioctl.h> +#include <sys/mman.h> +#include <sys/types.h> + +#include "system/nxcamera.h" +#ifdef CONFIG_LIBYUV +#include "libyuv.h" Review Comment: done -- This is an automated message from the Apache Git Service. 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