blockprocess.c

来自「ADI 公司的DSP ADSP21369 EZ-KIT LITE开发板的全部源代」· C语言 代码 · 共 32 行

#include "tt.h"

// Place the audio processing algorith here. The input and output are given
// as unsigned integer pointers.
void processBlock(unsigned int *inblock_ptr,unsigned int *outblock_ptr)
{
    int i;
    float temp_out;

    //Clear the Block Ready Semaphore
    blockReady = 0;

    //Set the Processing Active Semaphore before starting processing
    isProcessing = 1;

    /* Input data is 24-bit, we need to set the block start bit for the first word
    of the block and make 32-bit words. Data is contained in upper 24-bits of output
    word */
    // Shift left by 8 bits and set block start bit
    *(outblock_ptr) =  ((*(inblock_ptr))<<8 | 0x10);
    *(outblock_ptr+1) =  ((*(inblock_ptr+1))<<8 | 0x10);

    for(i=2; i<NUM_SAMPLES; i++)
    {
        // Shift left by 8 bits
       *(outblock_ptr+i) =  ((*(inblock_ptr+i))<<8);
    }

    //Clear the Processing Active Semaphore after processing is complete
    isProcessing = 0;
}