gistfile1.c

// Copyright 2016 Dolphin Emulator Project
// Licensed under GPLv2
// Refer to the license.txt file included.

#include <malloc.h>
#include <ogc/gx.h>
#include <ogc/audio.h>
#include <ogc/system.h>
#include <ogc/machine/processor.h>
#include <stdlib.h>
#include <string.h>
#include <wiiuse/wpad.h>
#include <math.h>

#include "common/hwtests.h"

char buffer[2*1024*1024];
char audio_buffer[1024*1024];
char * volatile bufp;

volatile int done = 0;

volatile int cycles = 0;

static void audio_dma_callback(void)
{
  cycles = mfpmc3();
  done = 1;
}

volatile int spin;

int main() {
  SYS_StartPMC(0, (1 << 27));

  network_init();
  WPAD_Init();
  bufp = buffer;

  {
    u32 i, level;
    DSP_Init();
    AUDIO_Init(NULL);
    AUDIO_StopDMA();
    AUDIO_SetDSPSampleRate(AI_SAMPLERATE_48KHZ);

    done = 0;
    AUDIO_RegisterDMACallback(audio_dma_callback);
  }

  bufp += sprintf(bufp, "start\n");

  int dma_size = 12 * 0x20;
  {
    for (int j = 0; j < 30; j++)
    {
      u32 level = IRQ_Disable();
      done = 0;

      AUDIO_InitDMA((u32)audio_buffer,SND_BUFFERSIZE);
      SYS_ResetPMC();
      AUDIO_StartDMA();

      IRQ_Restore(level);

      int i = 0;
      while (!done) {
        i++;
      }

      bufp += sprintf(bufp, "size %x: cycles = %d, i = %d\n", dma_size, cycles, i);

      AUDIO_StopDMA();
      for (spin = 0; spin < 356258 * 2; spin++) {
      }
    }
  }

  bufp += sprintf(bufp, "end\n");

  network_printf("%s\n", buffer);

  network_printf("Shutting down...\n");
  network_shutdown();

  return 0;
}