diff options
Diffstat (limited to 'Middlewares/ST/STM32_USB_Device_Library/Class/VIDEO/Src/usbd_video_if_template.c')
| -rw-r--r-- | Middlewares/ST/STM32_USB_Device_Library/Class/VIDEO/Src/usbd_video_if_template.c | 296 |
1 files changed, 296 insertions, 0 deletions
diff --git a/Middlewares/ST/STM32_USB_Device_Library/Class/VIDEO/Src/usbd_video_if_template.c b/Middlewares/ST/STM32_USB_Device_Library/Class/VIDEO/Src/usbd_video_if_template.c new file mode 100644 index 000000000..70b8d3aac --- /dev/null +++ b/Middlewares/ST/STM32_USB_Device_Library/Class/VIDEO/Src/usbd_video_if_template.c @@ -0,0 +1,296 @@ +/** + ****************************************************************************** + * @file usbd_video_if_template.c + * @author MCD Application Team + * @brief Template file for Video Interface application layer functions + ****************************************************************************** + * @attention + * + * <h2><center>© Copyright (c) 2020 STMicroelectronics. + * All rights reserved.</center></h2> + * + * This software component is licensed by ST under Ultimate Liberty license + * SLA0044, the "License"; You may not use this file except in compliance with + * the License. You may obtain a copy of the License at: + * www.st.com/SLA0044 + * + ****************************************************************************** + */ + +/* Includes ------------------------------------------------------------------*/ +#include "usbd_video_if.h" + +/* Include you image binary file here + Binary image template shall provide: + - tImagesList: table containing pointers to all images + - tImagesSizes: table containing sizes of each image respectively + - img_count: global image counter variable + - IMG_NBR: Total image number + + To generate such file, it is possible to use tools converting video to MJPEG then to JPEG images. + */ +/* #include "img_bin.h" */ + +/* USER CODE BEGIN INCLUDE */ + +/* USER CODE END INCLUDE */ + +/* Private typedef -----------------------------------------------------------*/ +/* Private define ------------------------------------------------------------*/ +/* Private macro -------------------------------------------------------------*/ + +/* USER CODE BEGIN PV */ +/* Private variables ---------------------------------------------------------*/ + +/* USER CODE END PV */ + +/** @addtogroup STM32_USB_OTG_DEVICE_LIBRARY + * @brief Usb device library. + * @{ + */ + +/** @addtogroup USBD_VIDEO_IF + * @{ + */ + +/** @defgroup USBD_VIDEO_IF_Private_TypesDefinitions + * @brief Private types. + * @{ + */ + +/* USER CODE BEGIN PRIVATE_TYPES */ + +/* USER CODE END PRIVATE_TYPES */ + +/** + * @} + */ + +/** @defgroup USBD_VIDEO_IF_Private_Defines + * @brief Private defines. + * @{ + */ + +/* USER CODE BEGIN PRIVATE_DEFINES */ + +/* USER CODE END PRIVATE_DEFINES */ + +/** + * @} + */ + +/** @defgroup USBD_VIDEO_IF_Private_Macros + * @brief Private macros. + * @{ + */ + +/* USER CODE BEGIN PRIVATE_MACRO */ + +/* USER CODE END PRIVATE_MACRO */ + +/** + * @} + */ + +/** @defgroup USBD_VIDEO_IF_Private_Variables + * @brief Private variables. + * @{ + */ + +/* USER CODE BEGIN PRIVATE_VARIABLES */ + +/* USER CODE END PRIVATE_VARIABLES */ + +/** + * @} + */ + +/** @defgroup USBD_VIDEO_IF_Exported_Variables + * @brief Public variables. + * @{ + */ + + + +/* USER CODE BEGIN EXPORTED_VARIABLES */ + +/* USER CODE END EXPORTED_VARIABLES */ + +/** + * @} + */ + +/** @defgroup USBD_VIDEO_IF_Private_FunctionPrototypes + * @brief Private functions declaration. + * @{ + */ + +static int8_t VIDEO_Itf_Init(void); +static int8_t VIDEO_Itf_DeInit(void); +static int8_t VIDEO_Itf_Control(uint8_t cmd, uint8_t *pbuf, uint16_t length); +static int8_t VIDEO_Itf_Data(uint8_t **pbuf, uint16_t *psize, uint16_t *pcktidx); + + +/* USER CODE BEGIN PRIVATE_FUNCTIONS_DECLARATION */ + +/* USER CODE END PRIVATE_FUNCTIONS_DECLARATION */ + +/** + * @} + */ + +USBD_VIDEO_ItfTypeDef USBD_VIDEO_fops_FS = +{ + VIDEO_Itf_Init, + VIDEO_Itf_DeInit, + VIDEO_Itf_Control, + VIDEO_Itf_Data, +}; + +/* Private functions ---------------------------------------------------------*/ +/** + * @brief Initializes the VIDEO media low layer over USB FS IP + * @param VIDEOFreq: VIDEO frequency used to play the VIDEO stream. + * @param Volume: Initial volume level (from 0 (Mute) to 100 (Max)) + * @param options: Reserved for future use + * @retval USBD_OK if all operations are OK else USBD_FAIL + */ +static int8_t VIDEO_Itf_Init(void) +{ + /* + Add your initialization code here + */ + + return (0); +} + +/** + * @brief TEMPLATE_DeInit + * DeInitializes the UVC media low layer + * @param None + * @retval Result of the operation: USBD_OK if all operations are OK else USBD_FAIL + */ +static int8_t VIDEO_Itf_DeInit(void) +{ + /* + Add your deinitialization code here + */ + return (0); +} + + +/** + * @brief TEMPLATE_Control + * Manage the UVC class requests + * @param Cmd: Command code + * @param Buf: Buffer containing command data (request parameters) + * @param Len: Number of data to be sent (in bytes) + * @retval Result of the operation: USBD_OK if all operations are OK else USBD_FAIL + */ +static int8_t VIDEO_Itf_Control(uint8_t cmd, uint8_t *pbuf, uint16_t length) +{ + + return (0); +} + +/** + * @brief TEMPLATE_Data + * Manage the UVC data packets + * @param pbuf: pointer to the buffer data to be filled + * @param psize: pointer tot he current packet size to be filled + * @param pcktidx: pointer to the current packet index in the current image + * @retval Result of the operation: USBD_OK if all operations are OK else USBD_FAIL + */ +static int8_t VIDEO_Itf_Data(uint8_t **pbuf, uint16_t *psize, uint16_t *pcktidx) +{ + /* + Implementation of this function is mandatory to provide the video data to the USB video class + This function shall parse the MJPEG images and provide each time the buffer packet relative to + current packet index and its size. + If the packet is the first packet in the current MJPEG image, then packet size shall be zero and + the pbuf is ignored and pcktidx shall be zero. + Below is typical implementation of this function based on a binary image template. + + Binary image template shall provide: + - tImagesList: table containing pointers to all images + - tImagesSizes: table containing sizes of each image respectively + - img_count: global image counter variable + - IMG_NBR: Total image number + + To generate such file, it is possible to use tools converting video to MJPEG then to JPEG images. + + */ + const uint8_t *(*ImagePtr) = tImagesList; + uint32_t packet_count = (tImagesSizes[img_count]) / ((uint16_t)(UVC_PACKET_SIZE - (UVC_HEADER_PACKET_CNT * 2U))); + uint32_t packet_remainder = (tImagesSizes[img_count]) % ((uint16_t)(UVC_PACKET_SIZE - (UVC_HEADER_PACKET_CNT * 2U))); + static uint8_t packet_index = 0; + + /* Check if end of current image has been reached */ + if (packet_index < packet_count) + { + /* Set the current packet size */ + *psize = (uint16_t)UVC_PACKET_SIZE; + + /* Get the pointer to the next packet to be transmitted */ + *pbuf = (uint8_t *)(*(ImagePtr + img_count) + packet_index * ((uint16_t)(UVC_PACKET_SIZE - (UVC_HEADER_PACKET_CNT * 2U)))); + } + else if ((packet_index == packet_count)) + { + if (packet_remainder != 0U) + { + /* Get the pointer to the next packet to be transmitted */ + *pbuf = (uint8_t *)(*(ImagePtr + img_count) + packet_index * ((uint16_t)(UVC_PACKET_SIZE - (UVC_HEADER_PACKET_CNT * 2U)))); + + /* Set the current packet size */ + *psize = packet_remainder + (UVC_HEADER_PACKET_CNT * 2U); + } + else + { + packet_index++; + + /* New image to be started, send only the packet header */ + *psize = 2; + } + } + else + { + /* New image to be started, send only the packet header */ + *psize = 2; + } + + /* Update the packet index */ + *pcktidx = packet_index; + + /* Increment the packet count and check if it reached the end of current image buffer */ + if (packet_index++ >= (packet_count + 1)) + { + /* Reset the packet count to zero */ + packet_index = 0U; + + /* Move to the next image in the images table */ + + img_count++; + HAL_Delay(USBD_VIDEO_IMAGE_LAPS); + /* Check if images count has been reached, then reset to zero (go back to first image in circular loop) */ + if (img_count == IMG_NBR) + { + img_count = 0U; + } + } + + return (0); +} + +/* USER CODE BEGIN PRIVATE_FUNCTIONS_IMPLEMENTATION */ + +/* USER CODE END PRIVATE_FUNCTIONS_IMPLEMENTATION */ + +/** + * @} + */ + +/** + * @} + */ + +/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/ |