-support for stereo ima-adpcm sample compression & playback

-support for converting samples to ima-adpcm upon export

1 files changed, 7 insertions, 1 deletions

diff --git a/tools/editor/plugins/sample_editor_plugin.cpp b/tools/editor/plugins/sample_editor_plugin.cpp
index 31fa7246ae..d88f2adc73 100644
--- a/tools/editor/plugins/sample_editor_plugin.cpp
+++ b/tools/editor/plugins/sample_editor_plugin.cpp
@@ -156,8 +156,14 @@ void SampleEditor::generate_preview_texture(const Ref<Sample>& p_sample,Ref<Imag
 					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];