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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_native.c
parentfa5717f2099aadb2083d5df4d19af8f9685fa03e (diff)
downloadlinux-d948035a928400ae127c873fbf771389bee18949.tar.bz2
[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_native.c')
-rw-r--r--sound/core/pcm_native.c13
1 files changed, 0 insertions, 13 deletions
diff --git a/sound/core/pcm_native.c b/sound/core/pcm_native.c
index 3fc33deabe35..3c22d78ee8f4 100644
--- a/sound/core/pcm_native.c
+++ b/sound/core/pcm_native.c
@@ -435,7 +435,6 @@ static int snd_pcm_hw_params(struct snd_pcm_substream *substream,
runtime->period_step = 1;
runtime->sleep_min = 0;
runtime->control->avail_min = runtime->period_size;
- runtime->xfer_align = runtime->period_size;
runtime->start_threshold = 1;
runtime->stop_threshold = runtime->buffer_size;
runtime->silence_threshold = 0;
@@ -532,9 +531,6 @@ static int snd_pcm_sw_params(struct snd_pcm_substream *substream,
return -EINVAL;
if (params->avail_min == 0)
return -EINVAL;
- if (params->xfer_align == 0 ||
- params->xfer_align % runtime->min_align != 0)
- return -EINVAL;
if (params->silence_size >= runtime->boundary) {
if (params->silence_threshold != 0)
return -EINVAL;
@@ -553,7 +549,6 @@ static int snd_pcm_sw_params(struct snd_pcm_substream *substream,
runtime->stop_threshold = params->stop_threshold;
runtime->silence_threshold = params->silence_threshold;
runtime->silence_size = params->silence_size;
- runtime->xfer_align = params->xfer_align;
params->boundary = runtime->boundary;
if (snd_pcm_running(substream)) {
if (runtime->sleep_min)
@@ -2239,8 +2234,6 @@ static snd_pcm_sframes_t snd_pcm_playback_rewind(struct snd_pcm_substream *subst
}
if (frames > (snd_pcm_uframes_t)hw_avail)
frames = hw_avail;
- else
- frames -= frames % runtime->xfer_align;
appl_ptr = runtime->control->appl_ptr - frames;
if (appl_ptr < 0)
appl_ptr += runtime->boundary;
@@ -2289,8 +2282,6 @@ static snd_pcm_sframes_t snd_pcm_capture_rewind(struct snd_pcm_substream *substr
}
if (frames > (snd_pcm_uframes_t)hw_avail)
frames = hw_avail;
- else
- frames -= frames % runtime->xfer_align;
appl_ptr = runtime->control->appl_ptr - frames;
if (appl_ptr < 0)
appl_ptr += runtime->boundary;
@@ -2340,8 +2331,6 @@ static snd_pcm_sframes_t snd_pcm_playback_forward(struct snd_pcm_substream *subs
}
if (frames > (snd_pcm_uframes_t)avail)
frames = avail;
- else
- frames -= frames % runtime->xfer_align;
appl_ptr = runtime->control->appl_ptr + frames;
if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
appl_ptr -= runtime->boundary;
@@ -2391,8 +2380,6 @@ static snd_pcm_sframes_t snd_pcm_capture_forward(struct snd_pcm_substream *subst
}
if (frames > (snd_pcm_uframes_t)avail)
frames = avail;
- else
- frames -= frames % runtime->xfer_align;
appl_ptr = runtime->control->appl_ptr + frames;
if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
appl_ptr -= runtime->boundary;