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-support for stereo ima-adpcm sample compression & playback

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-support for converting samples to ima-adpcm upon export
This commit is contained in:
Juan Linietsky
2015-11-09 00:49:18 -03:00
parent 3fcfdfec0a
commit 61c4c5795f
13 changed files with 312 additions and 71 deletions
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8
tools/editor/plugins/editor_preview_plugins.cpp
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@@ -491,8 +491,14 @@ Ref<Texture> EditorSamplePreviewPlugin::generate(const RES& p_from) {
ima_adpcm.last_nibble++;
const uint8_t *src_ptr=sdata;
int ofs = ima_adpcm.last_nibble>>1;
if (stereo)
ofs*=2;
nibble = (ima_adpcm.last_nibble&1)?
(src_ptr[ima_adpcm.last_nibble>>1]>>4):(src_ptr[ima_adpcm.last_nibble>>1]&0xF);
(src_ptr[ofs]>>4):(src_ptr[ofs]&0xF);
step=_ima_adpcm_step_table[ima_adpcm.step_index];
ima_adpcm.step_index += _ima_adpcm_index_table[nibble];