diff options
Diffstat (limited to 'src/lib/mid_side_decoder.cc')
| -rw-r--r-- | src/lib/mid_side_decoder.cc | 21 |
1 files changed, 16 insertions, 5 deletions
diff --git a/src/lib/mid_side_decoder.cc b/src/lib/mid_side_decoder.cc index 842d5c8ee..4f619ad57 100644 --- a/src/lib/mid_side_decoder.cc +++ b/src/lib/mid_side_decoder.cc @@ -59,16 +59,27 @@ MidSideDecoder::clone (int) const } shared_ptr<AudioBuffers> -MidSideDecoder::run (shared_ptr<const AudioBuffers> in) +MidSideDecoder::run (shared_ptr<const AudioBuffers> in, int channels) { - shared_ptr<AudioBuffers> out (new AudioBuffers (3, in->frames ())); + int const N = min (channels, 3); + shared_ptr<AudioBuffers> out (new AudioBuffers (channels, in->frames ())); for (int i = 0; i < in->frames(); ++i) { float const left = in->data()[0][i]; float const right = in->data()[1][i]; float const mid = (left + right) / 2; - out->data()[0][i] = left - mid; - out->data()[1][i] = right - mid; - out->data()[2][i] = mid; + if (N > 0) { + out->data()[0][i] = left - mid; + } + if (N > 1) { + out->data()[1][i] = right - mid; + } + if (N > 2) { + out->data()[2][i] = mid; + } + } + + for (int i = N; i < channels; ++i) { + out->make_silent (i); } return out; |