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);     
}

Diff: main.cpp

Revision:
0:98f918e1d528
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Sat Feb 02 01:25:25 2013 +0000
@@ -0,0 +1,57 @@
+// SimpleJpegDecode_example/main.cpp 2013/2/2
+// convert jpeg to bmp
+//
+#include "mbed.h"
+#include "rtos.h"
+#include "BaseUsbHost.h"
+#include "SimpleJpegDecode.h"
+#include "UsbFlashDrive.h"
+#include "bmp24.h"
+
+#define INPUT_FILE  "/usb/input.jpg"
+#define OUTPUT_FILE "/usb/output.bmp"
+
+Serial pc(USBTX, USBRX);
+
+SimpleJpegDecode decode;
+bmp24 bmp;
+
+void callbackRGB(int x, int y, uint8_t* rgb)
+{
+    bmp.point(x, y, rgb);
+}
+
+int main() {
+    pc.baud(921600);
+    printf("%s\n", __FILE__);
+
+    BaseUsbHost* usbHost = new BaseUsbHost();
+    ControlEp* ctlEp = new ControlEp; // root hub
+    if (UsbHub::check(ctlEp)) {
+        UsbHub* hub = new UsbHub(ctlEp);
+        ctlEp = hub->search<UsbFlashDrive>();
+    }
+    if (!UsbFlashDrive::check(ctlEp)) {
+        error("USB flash drive is not connected.\n");
+    }
+    UsbFlashDrive* drive = new UsbFlashDrive("usb", ctlEp);
+
+    bmp.clear();
+    decode.setOnResult(callbackRGB);
+    decode.clear();
+    printf("input: %s\n", INPUT_FILE);
+    FILE* fp = fopen(INPUT_FILE, "rb");
+    if (fp == NULL) {
+         error("open error\n");
+    }
+    while(!feof(fp)) {
+        int c = fgetc(fp);
+        decode.input(c);
+    }
+    fclose(fp);
+    printf("output: %s\n", OUTPUT_FILE);
+    if (!bmp.writeFile(OUTPUT_FILE)) {
+        error("write error\n");
+    }
+    exit(1);     
+}