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Add "session rate" as a possible sample rate for export formats

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git-svn-id: svn://localhost/ardour2/branches/3.0@8294 d708f5d6-7413-0410-9779-e7cbd77b26cf
This commit is contained in:
Sakari Bergen 2010-12-18 17:56:41 +00:00
parent 850b7d24a9
commit ffadfff650
8 changed files with 55 additions and 5 deletions
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26
libs/ardour/export_format_base.cc
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@ -198,4 +198,30 @@ ExportFormatBase::do_set_operation (ExportFormatBase const & other, SetOperation
return result;
}
ExportFormatBase::SampleRate
ExportFormatBase::nearest_sample_rate (framecnt_t sample_rate)
{
int diff = 0;
int smallest_diff = INT_MAX;
SampleRate best_match = SR_None;
#define DO_SR_COMPARISON(rate) \
diff = std::abs((rate) - sample_rate); \
if(diff < smallest_diff) { \
smallest_diff = diff; \
best_match = (rate); \
}
DO_SR_COMPARISON(SR_22_05);
DO_SR_COMPARISON(SR_22_05);
DO_SR_COMPARISON(SR_44_1);
DO_SR_COMPARISON(SR_48);
DO_SR_COMPARISON(SR_88_2);
DO_SR_COMPARISON(SR_96);
DO_SR_COMPARISON(SR_192);
return best_match;
#undef DO_SR_COMPARISON
}
}; // namespace ARDOUR