- memset((char *)gp2x_screen + offset, byte, len);
-}
-
-void gp2x_pd_clone_buffer2(void)
-{
- memset(gp2x_screen, 0, 320*240);
-}
-
-/* sound */
-static int s_oldrate = 0, s_oldbits = 0, s_oldstereo = 0;
-
-void gp2x_start_sound(int rate, int bits, int stereo)
-{
- int frag = 0, bsize, buffers;
-
- // if no settings change, we don't need to do anything
- if (rate == s_oldrate && s_oldbits == bits && s_oldstereo == stereo) return;
-
- if (sounddev > 0) close(sounddev);
- sounddev = open("/dev/dsp", O_WRONLY|O_ASYNC);
- if (sounddev == -1)
- printf("open(\"/dev/dsp\") failed with %i\n", errno);
-
- ioctl(sounddev, SNDCTL_DSP_SPEED, &rate);
- ioctl(sounddev, SNDCTL_DSP_SETFMT, &bits);
- ioctl(sounddev, SNDCTL_DSP_STEREO, &stereo);
- // calculate buffer size
- buffers = 16;
- bsize = rate / 32;
- if (rate > 22050) { bsize*=4; buffers*=2; } // 44k mode seems to be very demanding
- while ((bsize>>=1)) frag++;
- frag |= buffers<<16; // 16 buffers
- ioctl(sounddev, SNDCTL_DSP_SETFRAGMENT, &frag);
- printf("gp2x_set_sound: %i/%ibit/%s, %i buffers of %i bytes\n",
- rate, bits, stereo?"stereo":"mono", frag>>16, 1<<(frag&0xffff));
-
- s_oldrate = rate; s_oldbits = bits; s_oldstereo = stereo;
-}
-
-void gp2x_sound_write(void *buff, int len)
-{
- write(sounddev, buff, len);
-}
-
-void gp2x_sound_sync(void)
-{
- ioctl(sounddev, SOUND_PCM_SYNC, 0);
-}
-
-void gp2x_sound_volume(int l, int r)
-{
- l=l<0?0:l; l=l>255?255:l; r=r<0?0:r; r=r>255?255:r;
- l<<=8; l|=r;
- ioctl(mixerdev, SOUND_MIXER_WRITE_PCM, &l); /*SOUND_MIXER_WRITE_VOLUME*/