Norimasa Okamoto / Mbed 2 deprecated SimpleJpegDecode_example

convert JPEG stream data to bitmap, BaseJpegDecode example program

Dependencies:   BaseJpegDecode BaseUsbHost FATFileSystem mbed-rtos mbed

JPEGデコードのサンプルプログラムです。
JPEGのMCU単位で逐次デコード出力していますので少ないRAMメモリで動かすことが出来ます。

#include "USBHostMSD.h"
#include "SimpleJpegDecode.h"
#include "bmp24.h"

const char* INPUT_FILE  = "/usb/input.jpg";
const char* OUTPUT_FILE = "/usb/output.bmp";

bmp24 bmp;
RawSerial pc(USBTX, USBRX);

void callbackRGB(int x, int y, uint8_t* rgb) {
    bmp.point(x, y, rgb);
    pc.printf("x=%d, y=%d, RGB=(0x%02x,0x%02x,0x%02x)\n", x, y, rgb[0], rgb[1], rgb[2]);
}

int main() {
    pc.baud(115200);
    
    USBHostMSD* msd = new USBHostMSD("usb");
    if (!msd->connect()) {
        error("USB Flash drive not found.\n");
    } 
    SimpleJpegDecode* decode = new SimpleJpegDecode(RGB24);

    decode->setOnResult(callbackRGB);
    decode->clear();
    pc.printf("input: %s\n", INPUT_FILE);
    FILE* fp = fopen(INPUT_FILE, "rb");
    if (fp == NULL) {
         error("open error\n");
    }
    while(1) {
        int c = fgetc(fp);
        if (c == EOF) {
            break;
        }
        decode->input(c);
    }
    fclose(fp);
    pc.printf("output: %s\n", OUTPUT_FILE);
    if (!bmp.writeFile(OUTPUT_FILE)) {
        error("write error\n");
    }
    exit(1);     
}

UsbFlashDrive/UsbFlashDrive.h

Committer:
va009039
Date:
2013-02-02
Revision:
0:98f918e1d528

File content as of revision 0:98f918e1d528:

// usbFlashDrive.h 2013/1/8
#pragma once

#include "FATFileSystem.h"

#define  SCSI_CMD_REQUEST_SENSE      0x03
#define  SCSI_CMD_TEST_UNIT_READY    0x00
#define  SCSI_CMD_INQUIRY            0x12
#define  SCSI_CMD_READ_10            0x28
#define  SCSI_CMD_READ_CAPACITY      0x25
#define  SCSI_CMD_WRITE_10           0x2A

#pragma pack(push,1)
struct CBW {
    uint32_t dCBWSignature;
    uint32_t dCBWTag;
    uint32_t dCBWDataTraansferLength;
    uint8_t bmCBWFlags;
    uint8_t bCBWLUN;
    uint8_t bCBWCBLength;
    uint8_t CBWCB[16];
};

struct CSW {
    uint32_t dCSWSignature;
    uint32_t dCSWTag;
    uint32_t dCSWDataResidue;
    uint8_t  bCSWStatus;
};
#pragma pack(pop)

class UsbFlashDrive : public FATFileSystem {
public:
    UsbFlashDrive(const char* name, ControlEp* ctlEp = NULL);
    static bool check(ControlEp* ctlEp);
    virtual int disk_initialize();
    virtual int disk_write(const uint8_t* buffer, uint64_t sector);
    virtual int disk_read(uint8_t* buffer, uint64_t sector);    
    virtual int disk_status();
    virtual int disk_sync();
    virtual uint64_t disk_sectors();
private:
    int setup(ControlEp* ctlEp, int timeout = 9000);
    int ParseConfiguration(ControlEp* ctlEp);
    int BulkOnlyMassStorageReset(ControlEp* ctlEp);
    int GetMaxLUN(ControlEp* ctlEp);
    int ReadCapacity();
    int GetSenseInfo();
    int TestUnitReady();
    int Inquire();
    int MS_BulkRecv(uint32_t block_number, int num_blocks, uint8_t* user_buffer);
    int MS_BulkSend(uint32_t block_number, int num_blocks, const uint8_t* user_buffer);
    int CommandTransport(const uint8_t* cdb, int size);
    int StatusTransport();
    int _bulkRecv(uint8_t* buf, int size);
    int _bulkSend(const uint8_t* buf, int size);
    const char* m_name;
    int m_drive;
    uint32_t m_numBlocks;
    int m_BlockSize;
    int m_lun;
    int m_MaxLUN;
    int m_interface;
    uint32_t m_tag;
    CBW m_CBW;
    CSW m_CSW;
    // endpoint
    BulkEp* m_pEpBulkIn;
    BulkEp* m_pEpBulkOut;
    // report
    uint32_t m_report_disk_write;
    uint32_t m_report_disk_read;
    uint32_t m_report_disk_status;
    uint32_t m_report_disk_sync;
};