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resampler: choose_work_format use switch instead of if/else

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This way the function for choosing the work format should
be more readable and easier to expand in the future.
This commit is contained in:
poljar (Damir Jelić) 2013-07-11 19:28:29 +02:00
parent 78c18e71e0
commit 7665f60cc0
1 changed files with 23 additions and 10 deletions
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33
src/pulsecore/resampler.c
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@ -256,13 +256,27 @@ static pa_sample_format_t pa_resampler_choose_work_format(
pa_assert(method >= 0);
pa_assert(method < PA_RESAMPLER_MAX);
if ((method >= PA_RESAMPLER_SPEEX_FIXED_BASE && method <= PA_RESAMPLER_SPEEX_FIXED_MAX) ||
(method == PA_RESAMPLER_FFMPEG))
work_format = PA_SAMPLE_S16NE;
else if (method == PA_RESAMPLER_TRIVIAL || method == PA_RESAMPLER_COPY || method == PA_RESAMPLER_PEAKS) {
if (method >= PA_RESAMPLER_SPEEX_FIXED_BASE && method <= PA_RESAMPLER_SPEEX_FIXED_MAX)
method = PA_RESAMPLER_SPEEX_FIXED_BASE;
if (map_required || a != b || method == PA_RESAMPLER_PEAKS) {
switch (method) {
/* This block is for resampling functions that only
* support the S16 sample format. */
case PA_RESAMPLER_SPEEX_FIXED_BASE: /* fall through */
case PA_RESAMPLER_FFMPEG:
work_format = PA_SAMPLE_S16NE;
break;
/* This block is for resampling functions that support
* any sample format. */
case PA_RESAMPLER_COPY: /* fall through */
case PA_RESAMPLER_TRIVIAL:
if (!map_required && a == b) {
work_format = a;
break;
}
/* Else fall trough */
case PA_RESAMPLER_PEAKS:
if (a == PA_SAMPLE_S16NE || b == PA_SAMPLE_S16NE)
work_format = PA_SAMPLE_S16NE;
else if (a == PA_SAMPLE_S32NE || a == PA_SAMPLE_S32RE ||
@ -276,12 +290,11 @@ static pa_sample_format_t pa_resampler_choose_work_format(
work_format = PA_SAMPLE_FLOAT32NE;
else
work_format = PA_SAMPLE_S16NE;
break;
} else
work_format = a;
} else
work_format = PA_SAMPLE_FLOAT32NE;
default:
work_format = PA_SAMPLE_FLOAT32NE;
}
return work_format;
}