2009/4/23 Jon Smirl <jonsmirl@xxxxxxxxx>: > My new ALSA driver is playing the first three samples in a loop. It's > not progressing forward in the wav file. It's behaving like I'm not > calling snd_pcm_period_elapsed() but I have a printk() in it so I'm > sure it is being called. Later samples are not getting copied into the > DMA buffer, > > Can anyone give me a clue as to what to look for? > > root@phyCORE-MPC5200B-tiny:~ aplay phone.wav > snd_pcm_playback_open > snd_pcm_open > snd_pcm_open_file > snd_pcm_open_substream > mpc5200-psc-ac97 f0002200.sound: psc_dma_startup(substream=c78bd800) > mpc5200-psc-ac97 f0002200.sound: psc_dma_pcm_open(substream=c78bd800) > Playing WAVE 'phone.wav' : Signed 16 bit Little Endian, Rate 44100 Hz, Stereo > mpc5200-psc-ac97 f0002200.sound: > psc_ac97_hw_analog_params(substream=c78bd800) p_size=5513 > p_bytes=22052 periods=3 buffer_size=22050 buffer_bytes=88200 Your buffer is 4x the period size, but periods=3. Off by one error somewhere? Lee _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
