Add an initializer for TonalityAnalysisState.

This interns the asm flags parameter in the state struct
so we don't need to pass it with every call. It can be
expensive, so we don't want to query every run_analysis()
call, but since this (private) api is used by webrtc code
we need to provide a supportable interface for filling in
the correct value.

Note the initialization code is partially duplicated between
opus_encoder_init and the OPUS_RESET_STATE switch case, so we
must re-initialize it there.

Signed-off-by: Jean-Marc Valin <jmvalin@jmvalin.ca>

1 files changed, 10 insertions, 1 deletions

diff --git a/src/analysis.h b/src/analysis.h
index 9c328e8b..9c2b978a 100644
--- a/src/analysis.h
+++ b/src/analysis.h
@@ -76,12 +76,21 @@ typedef struct {
    int read_pos;
    int read_subframe;
    AnalysisInfo info[DETECT_SIZE];
+   int arch;
 } TonalityAnalysisState;
 
+/** Initialize a TonalityAnalysisState struct.
+ *
+ * This performs some possibly slow initialization steps which should
+ * not be repeated every analysis step. No allocated memory is retained
+ * by the state struct, so no cleanup call is required.
+ */
+void tonality_analysis_init(TonalityAnalysisState *analysis);
+
 void tonality_get_info(TonalityAnalysisState *tonal, AnalysisInfo *info_out, int len);
 
 void run_analysis(TonalityAnalysisState *analysis, const CELTMode *celt_mode, const void *analysis_pcm,
                  int analysis_frame_size, int frame_size, int c1, int c2, int C, opus_int32 Fs,
-                 int lsb_depth, downmix_func downmix, AnalysisInfo *analysis_info, int arch);
+                 int lsb_depth, downmix_func downmix, AnalysisInfo *analysis_info);
 
 #endif