47 lines
1.3 KiB
C++
47 lines
1.3 KiB
C++
// insert_plan.cpp — see insert_plan.h. Pure InsertMedia mode-bit arithmetic.
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#include "core/capture/insert_plan.h"
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namespace reasampler::capture {
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namespace {
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// Base target bits (mode&3). We use only 0 (current track) and 1 (new track).
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constexpr int kBaseCurrentTrack = 0;
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constexpr int kBaseNewTrack = 1;
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// Tempo-conform bits, verbatim from the header doc-comment.
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constexpr int kMatchTempo1x = 8;
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constexpr int kMatchTempoHalf = 16;
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constexpr int kMatchTempoDbl = 32;
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constexpr int kDontPreservePitch = 64;
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} // namespace
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int computeInsertMode(const InsertOptions& opts) {
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int mode = opts.target == InsertTarget::NewTrack ? kBaseNewTrack
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: kBaseCurrentTrack;
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switch (opts.conform) {
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case TempoConform::None:
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return mode; // native length, no stretch; never &4
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case TempoConform::Ratio1x:
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mode |= kMatchTempo1x;
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break;
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case TempoConform::RatioHalf:
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mode |= kMatchTempoHalf;
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break;
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case TempoConform::RatioDouble:
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mode |= kMatchTempoDbl;
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break;
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}
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// Reached only when a tempo bit is set (None already returned above).
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if (!opts.preservePitch)
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mode |= kDontPreservePitch;
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return mode;
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}
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} // namespace reasampler::capture
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