CherryUSB/demo/video_static_mjpeg_template.c

/*
 * Copyright (c) 2024, sakumisu
 *
 * SPDX-License-Identifier: Apache-2.0
 */
#include "usbd_core.h"
#include "usbd_video.h"
#include "cherryusb_mjpeg.h"

#define VIDEO_IN_EP  0x81
#define VIDEO_INT_EP 0x83

#ifdef CONFIG_USB_HS
#define MAX_PAYLOAD_SIZE  1024 // for high speed with one transcations every one micro frame
#define VIDEO_PACKET_SIZE (unsigned int)(((MAX_PAYLOAD_SIZE / 1)) | (0x00 << 11))

// #define MAX_PAYLOAD_SIZE  2048 // for high speed with two transcations every one micro frame
// #define VIDEO_PACKET_SIZE (unsigned int)(((MAX_PAYLOAD_SIZE / 2)) | (0x01 << 11))

// #define MAX_PAYLOAD_SIZE  3072 // for high speed with three transcations every one micro frame
// #define VIDEO_PACKET_SIZE (unsigned int)(((MAX_PAYLOAD_SIZE / 3)) | (0x02 << 11))

#else
#define MAX_PAYLOAD_SIZE  1020
#define VIDEO_PACKET_SIZE (unsigned int)(((MAX_PAYLOAD_SIZE / 1)) | (0x00 << 11))
#endif

#define WIDTH  (unsigned int)(640)
#define HEIGHT (unsigned int)(480)

#define CAM_FPS        (30)
#define INTERVAL       (unsigned long)(10000000 / CAM_FPS)
#define MIN_BIT_RATE   (unsigned long)(WIDTH * HEIGHT * 16 * CAM_FPS) //16 bit
#define MAX_BIT_RATE   (unsigned long)(WIDTH * HEIGHT * 16 * CAM_FPS)
#define MAX_FRAME_SIZE (unsigned long)(WIDTH * HEIGHT * 2)

#define VS_HEADER_SIZ (unsigned int)(VIDEO_SIZEOF_VS_INPUT_HEADER_DESC(1, 1) + VIDEO_SIZEOF_VS_FORMAT_MJPEG_DESC + VIDEO_SIZEOF_VS_FRAME_MJPEG_DESC(1))

#define USB_VIDEO_DESC_SIZ (unsigned long)(9 +                            \
                                           VIDEO_VC_NOEP_DESCRIPTOR_LEN + \
                                           9 +                            \
                                           VS_HEADER_SIZ +                \
                                           9 +                            \
                                           7)

#define USBD_VID           0xffff
#define USBD_PID           0xffff
#define USBD_MAX_POWER     100
#define USBD_LANGID_STRING 1033

static const uint8_t device_descriptor[] = {
    USB_DEVICE_DESCRIPTOR_INIT(USB_2_0, 0xef, 0x02, 0x01, USBD_VID, USBD_PID, 0x0001, 0x01)
};

static const uint8_t config_descriptor[] = {
    USB_CONFIG_DESCRIPTOR_INIT(USB_VIDEO_DESC_SIZ, 0x02, 0x01, USB_CONFIG_BUS_POWERED, USBD_MAX_POWER),
    //VIDEO_VC_DESCRIPTOR_INIT(0x00, VIDEO_INT_EP, 0x0100, VIDEO_VC_TERMINAL_LEN, 48000000, 0x02),
    VIDEO_VC_NOEP_DESCRIPTOR_INIT(0x00, VIDEO_INT_EP, 0x0100, VIDEO_VC_TERMINAL_LEN, 48000000, 0x02),
    VIDEO_VS_DESCRIPTOR_INIT(0x01, 0x00, 0x00),
    VIDEO_VS_INPUT_HEADER_DESCRIPTOR_INIT(0x01, VS_HEADER_SIZ, VIDEO_IN_EP, 0x00),
    VIDEO_VS_FORMAT_MJPEG_DESCRIPTOR_INIT(0x01, 0x01),
    VIDEO_VS_FRAME_MJPEG_DESCRIPTOR_INIT(0x01, WIDTH, HEIGHT, MIN_BIT_RATE, MAX_BIT_RATE, MAX_FRAME_SIZE, DBVAL(INTERVAL), 0x01, DBVAL(INTERVAL)),
    VIDEO_VS_DESCRIPTOR_INIT(0x01, 0x01, 0x01),
    /* 1.2.2.2 Standard VideoStream Isochronous Video Data Endpoint Descriptor */
    USB_ENDPOINT_DESCRIPTOR_INIT(VIDEO_IN_EP, 0x05, VIDEO_PACKET_SIZE, 0x01)
};

static const uint8_t device_quality_descriptor[] = {
    ///////////////////////////////////////
    /// device qualifier descriptor
    ///////////////////////////////////////
    0x0a,
    USB_DESCRIPTOR_TYPE_DEVICE_QUALIFIER,
    0x00,
    0x02,
    0x00,
    0x00,
    0x00,
    0x40,
    0x00,
    0x00,
};

static const char *string_descriptors[] = {
    (const char[]){ 0x09, 0x04 }, /* Langid */
    "CherryUSB",                  /* Manufacturer */
    "CherryUSB UVC DEMO",         /* Product */
    "2022123456",                 /* Serial Number */
};

static const uint8_t *device_descriptor_callback(uint8_t speed)
{
    return device_descriptor;
}

static const uint8_t *config_descriptor_callback(uint8_t speed)
{
    return config_descriptor;
}

static const uint8_t *device_quality_descriptor_callback(uint8_t speed)
{
    return device_quality_descriptor;
}

static const char *string_descriptor_callback(uint8_t speed, uint8_t index)
{
    if (index > 3) {
        return NULL;
    }
    return string_descriptors[index];
}

const struct usb_descriptor video_descriptor = {
    .device_descriptor_callback = device_descriptor_callback,
    .config_descriptor_callback = config_descriptor_callback,
    .device_quality_descriptor_callback = device_quality_descriptor_callback,
    .string_descriptor_callback = string_descriptor_callback
};

volatile bool tx_flag = 0;
volatile bool iso_tx_busy = false;

static void usbd_event_handler(uint8_t busid, uint8_t event)
{
    switch (event) {
        case USBD_EVENT_RESET:
            break;
        case USBD_EVENT_CONNECTED:
            break;
        case USBD_EVENT_DISCONNECTED:
            break;
        case USBD_EVENT_RESUME:
            break;
        case USBD_EVENT_SUSPEND:
            break;
        case USBD_EVENT_CONFIGURED:
            tx_flag = 0;
            iso_tx_busy = false;
            break;
        case USBD_EVENT_SET_REMOTE_WAKEUP:
            break;
        case USBD_EVENT_CLR_REMOTE_WAKEUP:
            break;

        default:
            break;
    }
}

void usbd_video_open(uint8_t busid, uint8_t intf)
{
    tx_flag = 1;
    USB_LOG_RAW("OPEN\r\n");
    iso_tx_busy = false;
}
void usbd_video_close(uint8_t busid, uint8_t intf)
{
    USB_LOG_RAW("CLOSE\r\n");
    tx_flag = 0;
    iso_tx_busy = false;
}

void usbd_video_iso_callback(uint8_t busid, uint8_t ep, uint32_t nbytes)
{
    if (nbytes == 0) {
        return;
    }

    if (usbd_video_stream_split_transfer(busid, ep)) {
        /* one frame has done */
        iso_tx_busy = false;
    }
}

static struct usbd_endpoint video_in_ep = {
    .ep_cb = usbd_video_iso_callback,
    .ep_addr = VIDEO_IN_EP
};

struct usbd_interface intf0;
struct usbd_interface intf1;

void video_init(uint8_t busid, uintptr_t reg_base)
{
    usbd_desc_register(busid, &video_descriptor);

    usbd_add_interface(busid, usbd_video_init_intf(busid, &intf0, INTERVAL, MAX_FRAME_SIZE, MAX_PAYLOAD_SIZE));
    usbd_add_interface(busid, usbd_video_init_intf(busid, &intf1, INTERVAL, MAX_FRAME_SIZE, MAX_PAYLOAD_SIZE));
    usbd_add_endpoint(busid, &video_in_ep);

    usbd_initialize(busid, reg_base, usbd_event_handler);
}

USB_NOCACHE_RAM_SECTION USB_MEM_ALIGNX uint8_t packet_buffer[MAX_PAYLOAD_SIZE];
USB_NOCACHE_RAM_SECTION USB_MEM_ALIGNX uint8_t frame_buffer[32 * 1024];

void video_test(uint8_t busid)
{
    memset(packet_buffer, 0, sizeof(packet_buffer));

    while (1) {
        if (tx_flag) {
            iso_tx_busy = true;
            memcpy(frame_buffer, cherryusb_mjpeg, sizeof(cherryusb_mjpeg)); // cherryusb_mjpeg is a static MJPEG frame buffer, so we need copy it to frame_buffer
            usbd_video_stream_start_write(busid, VIDEO_IN_EP, packet_buffer, (uint8_t *)frame_buffer, sizeof(cherryusb_mjpeg), false);
            while (iso_tx_busy) {
                if (tx_flag == 0) {
                    break;
                }
            }
        }
    }
}