Updating Opus to a pre-release of 1.1
This CL updates Opus to a pre-release of the coming Opus 1.1 version. The code is extracted from http://git.xiph.org/?p=opus.git, commit aee4d8057632ea0cfc1d55d88acf8466b47b7b4b from October 1st 2013.
This version includes both algorithmic and platform optimizations, as well an important fix for a denorm problem when the input goes silent after active audio. The problem causes high CPU usage.
Review URL: https://codereview.chromium.org/28553003
git-svn-id: svn://svn.chromium.org/chrome/trunk/deps/third_party/opus@230378 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/src/analysis.h b/src/analysis.h
new file mode 100644
index 0000000..cf37792
--- /dev/null
+++ b/src/analysis.h
@@ -0,0 +1,90 @@
+/* Copyright (c) 2011 Xiph.Org Foundation
+ Written by Jean-Marc Valin */
+/*
+ Redistribution and use in source and binary forms, with or without
+ modification, are permitted provided that the following conditions
+ are met:
+
+ - Redistributions of source code must retain the above copyright
+ notice, this list of conditions and the following disclaimer.
+
+ - Redistributions in binary form must reproduce the above copyright
+ notice, this list of conditions and the following disclaimer in the
+ documentation and/or other materials provided with the distribution.
+
+ THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR
+ CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+#ifndef ANALYSIS_H
+#define ANALYSIS_H
+
+#include "celt.h"
+#include "opus_private.h"
+
+#define NB_FRAMES 8
+#define NB_TBANDS 18
+#define NB_TOT_BANDS 21
+#define ANALYSIS_BUF_SIZE 720 /* 15 ms at 48 kHz */
+
+#define DETECT_SIZE 200
+
+typedef struct {
+ float angle[240];
+ float d_angle[240];
+ float d2_angle[240];
+ opus_val32 inmem[ANALYSIS_BUF_SIZE];
+ int mem_fill; /* number of usable samples in the buffer */
+ float prev_band_tonality[NB_TBANDS];
+ float prev_tonality;
+ float E[NB_FRAMES][NB_TBANDS];
+ float lowE[NB_TBANDS];
+ float highE[NB_TBANDS];
+ float meanE[NB_TOT_BANDS];
+ float mem[32];
+ float cmean[8];
+ float std[9];
+ float music_prob;
+ float Etracker;
+ float lowECount;
+ int E_count;
+ int last_music;
+ int last_transition;
+ int count;
+ opus_val32 subframe_mem[3];
+ int analysis_offset;
+ /** Probability of having speech for time i to DETECT_SIZE-1 (and music before).
+ pspeech[0] is the probability that all frames in the window are speech. */
+ float pspeech[DETECT_SIZE];
+ /** Probability of having music for time i to DETECT_SIZE-1 (and speech before).
+ pmusic[0] is the probability that all frames in the window are music. */
+ float pmusic[DETECT_SIZE];
+ float speech_confidence;
+ float music_confidence;
+ int speech_confidence_count;
+ int music_confidence_count;
+ int write_pos;
+ int read_pos;
+ int read_subframe;
+ AnalysisInfo info[DETECT_SIZE];
+} TonalityAnalysisState;
+
+void tonality_analysis(TonalityAnalysisState *tonal, AnalysisInfo *info,
+ const CELTMode *celt_mode, const void *x, int len, int offset, int c1, int c2, int C, int lsb_depth, downmix_func downmix);
+
+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);
+
+#endif