overlayaud.c

Equator 公司BSP-15 DSP开发平台所有驱动程序源码

/**
*** Copyright (c) 2002 Equator Technologies, Inc.
**/

/************************************************************************
***
***  FILENAME: overlayaud.c
***
***  DESCRIPTION:
***    Test application for video capture and display overlay with Audio.
***
***    This application captures two video sources (PAL or NTSC),
***    displaying one in a picture-in-picture window. A graphics overlay
***    is also drawn on the screen.
***
***    Note: This application will only function on boards with two
***    video sources (e.g. Stingray, Dolphin).
***
***    Sample command lines:
***      NTSC:        overlayaud 0 1 0 0
***      PAL:         overlayaud 1 1 0 0
***
************************************************************************/

#include <eti/drv.h>

// Macro for checking a driver return code
#define CHECK_RC(rc, fnname) \
    if (ETIDRV_CHECK_ERROR(rc)) { \
        printf(fnname ## " failed, error = 0x%08x\n", rc); \
        exit(1); \
    }

// Main processing function
SCODE ProcessOverlay_Audio(
    BOOL bUsePal,        // Set to 0 to capture/display NTSC
    BOOL bUsePort0,      // Set to 1 to enable primary video in
    BOOL bUsePort1,      // Set to 1 to enable secondary video in
    int iFramesToCapture // Number of frames to capture (0=capture forever)
)
{
    SCODE err = ETIDRV_OK;
    int iFrameCount;

    err = InitOverlay(bUsePal, bUsePort0, bUsePort1);
    CHECK_RC(err, "InitOverlay");

    if (bUsePal)
        err = InitAudio(25);   // 25 frames per sec to match PAL 
    else
        err = InitAudio(30);   // 30 frames per sec to match NTSC
    CHECK_RC (err, "InitAudio");

    //
    // Loop the desired number of frames (0 = forever)
    //
    iFrameCount   = 0;
    while (iFramesToCapture == 0 ||
           iFrameCount < iFramesToCapture) {
      err = ProcessOverlaySingle(iFrameCount);
      CHECK_RC(err, "ProcessOverlaySingle");

      err = ProcessAudioSingle();
      CHECK_RC(err, "ProcessAudioSingle");

      ++iFrameCount;
    }

    err = CloseOverlay();
    CHECK_RC(err, "CloseOverlay");

    err = CloseAudio();
    CHECK_RC(err, "CloseAudio");

    return err;
}


static void usage (void)
{
    printf("usage: overlayaud bUsePal bUsePort0 bUsePort1 NumFrames\n");
    printf("  Zero NumFrames will run forever\n");
}


SCODE overlayaud(
    BOOL bUsePal,        // Set to 0 to capture/display NTSC
    BOOL bUsePort0,      // Set to 1 to enable primary video in
    BOOL bUsePort1,      // Set to 1 to enable secondary video in
    int iFramesToCapture // Number of frames to capture (0=capture forever)
)
{
    if ((bUsePal != 0    &&  bUsePal != 1)   ||   // valid UsePal values
        (bUsePort0 != 0  &&  bUsePort0 != 1) ||   // valid port0 values
        (bUsePort1 != 0  &&  bUsePort1 != 1) ||   // valid port1 values
        (bUsePort0 == 0  &&  bUsePort1 == 0) ||   // no input ports?
        iFramesToCapture < 0) {
        usage();
        exit();
    }

    printf("Overlay and Audio test application\n");

    return ProcessOverlay_Audio (bUsePal, bUsePort0,bUsePort1,iFramesToCapture);
}


#ifndef RTOS

void main(int argc, char *argv[])
{
    SCODE err;
    BOOL bUsePal = 0;
    BOOL bUsePort0 = 0;
    BOOL bUsePort1 = 0;
    int iFramesToCapture = 0;
    
    //
    // Get command line arguments
    // 
    if (argc != 5) {
        usage();
        exit(1);
    }

    bUsePal = atoi(argv[1]);
    bUsePort0 = atoi(argv[2]);
    bUsePort1 = atoi(argv[3]);
    iFramesToCapture = atoi(argv[4]);

    err = overlayaud(bUsePal, bUsePort0, bUsePort1, iFramesToCapture);

    exit (err == ETIDRV_OK ? 0 : 1);
}

#endif