Add channel index mask audio data conversion
Adds memcpy_by_index_array_initialization_dst_index which fills an
index array used by memcpy_by_index_array.
Change-Id: Ice6c23646994acdd934fd817813ef1ee010ba03a
diff --git a/audio_utils/primitives.c b/audio_utils/primitives.c
index f3a5a50..633faab 100644
--- a/audio_utils/primitives.c
+++ b/audio_utils/primitives.c
@@ -457,3 +457,23 @@
}
return dst_idx;
}
+
+size_t memcpy_by_index_array_initialization_dst_index(int8_t *idxary, size_t idxcount,
+ uint32_t dst_mask, uint32_t src_mask) {
+ size_t src_idx, dst_idx;
+ size_t dst_count = __builtin_popcount(dst_mask);
+ size_t src_count = __builtin_popcount(src_mask);
+ if (idxcount == 0) {
+ return dst_count;
+ }
+ if (dst_count > idxcount) {
+ dst_count = idxcount;
+ }
+ for (src_idx = 0, dst_idx = 0; dst_idx < dst_count; ++src_idx) {
+ if (dst_mask & 1) {
+ idxary[dst_idx++] = src_idx < src_count ? (signed)src_idx : -1;
+ }
+ dst_mask >>= 1;
+ }
+ return dst_idx;
+}