redonkable
/
alistair23-linux
1
0
Fork 0
Code Releases Activity

ALSA: pcm: use goto statement instead of while statement to reduce indentation 

In a process to calculate parameters of PCM substream, application of all
rules is iterated several times till parameter dependencies are satisfied.
In current implementation, two loops are used for the design, however this
brings two-level indentation and decline readability.

This commit attempts to reduce the indentation by using goto statement,
instead of outer while loop.

Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
hifive-unleashed-5.1
Takashi Sakamoto 2017-06-09 06:37:02 +09:00 committed by Takashi Iwai
parent 9cc07f55d4
commit 0d4e399965
1 changed files with 48 additions and 46 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

94
sound/core/pcm_native.c
View File

@ -337,54 +337,56 @@ static int constrain_params_by_rules(struct snd_pcm_substream *substream,
rstamps[k] = 0;
for (k = 0; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++)
vstamps[k] = (params->rmask & (1 << k)) ? 1 : 0;
do {
again = 0;
for (k = 0; k < constrs->rules_num; k++) {
struct snd_pcm_hw_rule *r = &constrs->rules[k];
unsigned int d;
int doit = 0;
if (r->cond && !(r->cond & params->flags))
continue;
for (d = 0; r->deps[d] >= 0; d++) {
if (vstamps[r->deps[d]] > rstamps[k]) {
doit = 1;
break;
}
retry:
again = 0;
for (k = 0; k < constrs->rules_num; k++) {
struct snd_pcm_hw_rule *r = &constrs->rules[k];
unsigned int d;
int doit = 0;
if (r->cond && !(r->cond & params->flags))
continue;
for (d = 0; r->deps[d] >= 0; d++) {
if (vstamps[r->deps[d]] > rstamps[k]) {
doit = 1;
break;
}
if (!doit)
continue;
if (trace_hw_mask_param_enabled()) {
if (hw_is_mask(r->var))
old_mask = *hw_param_mask(params, r->var);
}
if (trace_hw_interval_param_enabled()) {
if (hw_is_interval(r->var))
old_interval = *hw_param_interval(params, r->var);
}
changed = r->func(params, r);
if (hw_is_mask(r->var)) {
trace_hw_mask_param(substream, r->var, k + 1,
&old_mask, hw_param_mask(params, r->var));
}
if (hw_is_interval(r->var)) {
trace_hw_interval_param(substream, r->var, k + 1,
&old_interval, hw_param_interval(params, r->var));
}
rstamps[k] = stamp;
if (changed && r->var >= 0) {
params->cmask |= (1 << r->var);
vstamps[r->var] = stamp;
again = 1;
}
if (changed < 0)
return changed;
stamp++;
}
} while (again);
if (!doit)
continue;
if (trace_hw_mask_param_enabled()) {
if (hw_is_mask(r->var))
old_mask = *hw_param_mask(params, r->var);
}
if (trace_hw_interval_param_enabled()) {
if (hw_is_interval(r->var))
old_interval = *hw_param_interval(params, r->var);
}
changed = r->func(params, r);
if (hw_is_mask(r->var)) {
trace_hw_mask_param(substream, r->var, k + 1,
&old_mask, hw_param_mask(params, r->var));
}
if (hw_is_interval(r->var)) {
trace_hw_interval_param(substream, r->var, k + 1,
&old_interval, hw_param_interval(params, r->var));
}
rstamps[k] = stamp;
if (changed && r->var >= 0) {
params->cmask |= (1 << r->var);
vstamps[r->var] = stamp;
again = 1;
}
if (changed < 0)
return changed;
stamp++;
}
if (again)
goto retry;
return 0;
}