ALSA: snd-usb-caiaq: fix reported elapsed periods
Daniel Mack [Mon, 27 Apr 2009 10:18:05 +0000 (12:18 +0200)]
Reset the internal period position counter upon stream startup. This
fixes initial aplay underruns and problems related to latency picky
applications such as pulseaudio.

Bumped the version number to 1.3.14.

Signed-off-by: Daniel Mack <daniel@caiaq.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/usb/caiaq/audio.c
sound/usb/caiaq/device.c

index 3f45c0f..b13ce76 100644 (file)
@@ -195,11 +195,14 @@ static int snd_usb_caiaq_pcm_prepare(struct snd_pcm_substream *substream)
 
        debug("%s(%p)\n", __func__, substream);
        
-       if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+       if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+               dev->period_out_count[index] = BYTES_PER_SAMPLE + 1;
                dev->audio_out_buf_pos[index] = BYTES_PER_SAMPLE + 1;
-       else
+       } else {
+               dev->period_in_count[index] = BYTES_PER_SAMPLE;
                dev->audio_in_buf_pos[index] = BYTES_PER_SAMPLE;
-       
+       }
+
        if (dev->streaming)
                return 0;
        
@@ -300,8 +303,7 @@ static void check_for_elapsed_periods(struct snd_usb_caiaqdev *dev,
                if (!sub)
                        continue;
 
-               pb = frames_to_bytes(sub->runtime, 
-                                    sub->runtime->period_size);
+               pb = snd_pcm_lib_period_bytes(sub);
                cnt = (sub->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
                                        &dev->period_out_count[stream] :
                                        &dev->period_in_count[stream];
index 6d51770..515de1c 100644 (file)
@@ -35,7 +35,7 @@
 #include "input.h"
 
 MODULE_AUTHOR("Daniel Mack <daniel@caiaq.de>");
-MODULE_DESCRIPTION("caiaq USB audio, version 1.3.13");
+MODULE_DESCRIPTION("caiaq USB audio, version 1.3.14");
 MODULE_LICENSE("GPL");
 MODULE_SUPPORTED_DEVICE("{{Native Instruments, RigKontrol2},"
                         "{Native Instruments, RigKontrol3},"