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zijiehe authored
This change implements down mixing logic in AudioPump. It adds 3 / 4 / 5 / 6 / 7 / 8 channels support in AudioPacket and down mixes the packet into stereo before encoding. The newly added logic will only be executed once multichannel output is returned by Windows API. R=SergeyU@chromium.org, JoeDow@chromium.org BUG=669070 Review-Url: https://codereview.chromium.org/2903153004 Cr-Commit-Position: refs/heads/master@{#478488}
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