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authorTakashi Iwai <tiwai@suse.de>2008-01-08 18:05:26 +0100
committerJaroslav Kysela <perex@perex.cz>2008-01-31 17:29:47 +0100
commitd948035a928400ae127c873fbf771389bee18949 (patch)
tree1f8c98f21627e0ae1747c471dfbc3148923d80dd /sound/core/pcm_lib.c
parentfa5717f2099aadb2083d5df4d19af8f9685fa03e (diff)
[ALSA] Remove PCM xfer_align sw params
The xfer_align sw_params parameter has never been used in a sane manner, and no one understands what this does exactly. The current implementation looks also buggy because it allows write of shorter size than xfer_align. So, if you do partial writes, the write isn't actually aligned at all. Removing this parameter will make some pcm_lib_* code more readable (and less buggy). Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Jaroslav Kysela <perex@perex.cz>
Diffstat (limited to 'sound/core/pcm_lib.c')
-rw-r--r--sound/core/pcm_lib.c18
1 files changed, 4 insertions, 14 deletions
diff --git a/sound/core/pcm_lib.c b/sound/core/pcm_lib.c
index f9f9b3fe956..c1c1556105c 100644
--- a/sound/core/pcm_lib.c
+++ b/sound/core/pcm_lib.c
@@ -1628,8 +1628,6 @@ static snd_pcm_sframes_t snd_pcm_lib_write1(struct snd_pcm_substream *substream,
if (size == 0)
return 0;
- if (size > runtime->xfer_align)
- size -= size % runtime->xfer_align;
snd_pcm_stream_lock_irq(substream);
switch (runtime->status->state) {
@@ -1657,9 +1655,7 @@ static snd_pcm_sframes_t snd_pcm_lib_write1(struct snd_pcm_substream *substream,
avail = snd_pcm_playback_avail(runtime);
if (!avail ||
(snd_pcm_running(substream) &&
- ((avail < runtime->control->avail_min && size > avail) ||
- (size >= runtime->xfer_align &&
- avail < runtime->xfer_align)))) {
+ (avail < runtime->control->avail_min && size > avail))) {
wait_queue_t wait;
enum { READY, SIGNALED, ERROR, SUSPENDED, EXPIRED, DROPPED } state;
long tout;
@@ -1731,8 +1727,6 @@ static snd_pcm_sframes_t snd_pcm_lib_write1(struct snd_pcm_substream *substream,
break;
}
}
- if (avail > runtime->xfer_align)
- avail -= avail % runtime->xfer_align;
frames = size > avail ? avail : size;
cont = runtime->buffer_size - runtime->control->appl_ptr % runtime->buffer_size;
if (frames > cont)
@@ -1900,8 +1894,6 @@ static snd_pcm_sframes_t snd_pcm_lib_read1(struct snd_pcm_substream *substream,
if (size == 0)
return 0;
- if (size > runtime->xfer_align)
- size -= size % runtime->xfer_align;
snd_pcm_stream_lock_irq(substream);
switch (runtime->status->state) {
@@ -1936,12 +1928,12 @@ static snd_pcm_sframes_t snd_pcm_lib_read1(struct snd_pcm_substream *substream,
__draining:
avail = snd_pcm_capture_avail(runtime);
if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
- if (avail < runtime->xfer_align) {
+ if (!avail) {
err = -EPIPE;
goto _end_unlock;
}
- } else if ((avail < runtime->control->avail_min && size > avail) ||
- (size >= runtime->xfer_align && avail < runtime->xfer_align)) {
+ } else if (avail < runtime->control->avail_min &&
+ size > avail) {
wait_queue_t wait;
enum { READY, SIGNALED, ERROR, SUSPENDED, EXPIRED, DROPPED } state;
long tout;
@@ -2014,8 +2006,6 @@ static snd_pcm_sframes_t snd_pcm_lib_read1(struct snd_pcm_substream *substream,
break;
}
}
- if (avail > runtime->xfer_align)
- avail -= avail % runtime->xfer_align;
frames = size > avail ? avail : size;
cont = runtime->buffer_size - runtime->control->appl_ptr % runtime->buffer_size;
if (frames > cont)