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ALSA: snd-usb-caiaq: fix reported elapsed periods

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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>
This commit is contained in:
Daniel Mack 2009-04-27 12:18:05 +02:00 committed by Takashi Iwai
parent 936e7d0339
commit a9b487fa1e
2 changed files with 8 additions and 6 deletions
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12
sound/usb/caiaq/audio.c
View 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];

2
sound/usb/caiaq/device.c
View 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},"