From 80821482006f0730ba70d3e0af63f77cb976285a Mon Sep 17 00:00:00 2001
From: Thom Johansen <thomj@rockbox.org>
Date: Wed, 14 Nov 2007 12:11:13 +0000
Subject: Sync latest Speex stereo changes.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@15617 a1c6a512-1295-4272-9138-f99709370657
---
 apps/codecs/libspeex/stereo.c | 14 ++++++++------
 apps/codecs/libspeex/vq.c     | 23 -----------------------
 apps/codecs/libspeex/vq.h     |  1 -
 3 files changed, 8 insertions(+), 30 deletions(-)

diff --git a/apps/codecs/libspeex/stereo.c b/apps/codecs/libspeex/stereo.c
index 9fa812dd72..5f74197054 100644
--- a/apps/codecs/libspeex/stereo.c
+++ b/apps/codecs/libspeex/stereo.c
@@ -45,7 +45,7 @@ typedef struct RealSpeexStereoState {
    spx_word32_t e_ratio;      /**< Ratio of energies: E(left+right)/[E(left)+E(right)]  */
    spx_word32_t smooth_left;  /**< Smoothed left channel gain */
    spx_word32_t smooth_right; /**< Smoothed right channel gain */
-   spx_int32_t reserved1;     /**< Reserved for future use */
+   spx_uint32_t reserved1;     /**< Reserved for future use */
    spx_int32_t reserved2;     /**< Reserved for future use */
 } RealSpeexStereoState;
 
@@ -53,15 +53,17 @@ typedef struct RealSpeexStereoState {
 /*float e_ratio_quant[4] = {1, 1.26, 1.587, 2};*/
 #ifndef FIXED_POINT
 static const float e_ratio_quant[4] = {.25f, .315f, .397f, .5f};
+static const float e_ratio_quant_bounds[3] = {0.2825f, 0.356f, 0.4485f};
 #else
 static const spx_word16_t e_ratio_quant[4] = {8192, 10332, 13009, 16384};
+static const spx_word16_t e_ratio_quant_bounds[3] = {9257, 11665, 14696};
 #endif
 
 /* This is an ugly compatibility hack that properly resets the stereo state
    In case it it compiled in fixed-point, but initialised with the deprecated
    floating point static initialiser */
 #ifdef FIXED_POINT
-#define COMPATIBILITY_HACK(s) do {if ((s)->reserved1 != 0xdeadbeef) speex_stereo_state_init(s); } while (0);
+#define COMPATIBILITY_HACK(s) do {if ((s)->reserved1 != 0xdeadbeef) speex_stereo_state_reset((SpeexStereoState*)s); } while (0);
 #else
 #define COMPATIBILITY_HACK(s) 
 #endif
@@ -134,8 +136,8 @@ void speex_encode_stereo(float *data, int frame_size, SpeexBits *bits)
    
    speex_bits_pack(bits, (int)balance, 5);
    
-   /* FIXME: Convert properly */
-   tmp=vq_index(&e_ratio, e_ratio_quant, 1, 4);
+   /* FIXME: this is a hack */
+   tmp=scal_quant(e_ratio*Q15_ONE, e_ratio_quant_bounds, 3);
    speex_bits_pack(bits, tmp, 2);
 }
 
@@ -171,8 +173,8 @@ void speex_encode_stereo_int(spx_int16_t *data, int frame_size, SpeexBits *bits)
    
    speex_bits_pack(bits, (int)balance, 5);
    
-   /* FIXME: Convert properly */
-   tmp=vq_index(&e_ratio, e_ratio_quant, 1, 4);
+   /* FIXME: this is a hack */
+   tmp=scal_quant(e_ratio*Q15_ONE, e_ratio_quant_bounds, 3);
    speex_bits_pack(bits, tmp, 2);
 }
 #endif /* SPEEX_DISABLE_ENCODER */
diff --git a/apps/codecs/libspeex/vq.c b/apps/codecs/libspeex/vq.c
index 1c66b32b16..fff470a588 100644
--- a/apps/codecs/libspeex/vq.c
+++ b/apps/codecs/libspeex/vq.c
@@ -70,29 +70,6 @@ int scal_quant32(spx_word32_t in, const spx_word32_t *boundary, int entries)
    return i;
 }
 
-/*Finds the index of the entry in a codebook that best matches the input*/
-int vq_index(float *in, const float *codebook, int len, int entries)
-{
-   int i,j;
-   float min_dist=0;
-   int best_index=0;
-   for (i=0;i<entries;i++)
-   {
-      float dist=0;
-      for (j=0;j<len;j++)
-      {
-         float tmp = in[j]-*codebook++;
-         dist += tmp*tmp;
-      }
-      if (i==0 || dist<min_dist)
-      {
-         min_dist=dist;
-         best_index=i;
-      }
-   }
-   return best_index;
-}
-
 
 #ifndef OVERRIDE_VQ_NBEST
 /*Finds the indices of the n-best entries in a codebook*/
diff --git a/apps/codecs/libspeex/vq.h b/apps/codecs/libspeex/vq.h
index 478d8696bd..5a4ced249c 100644
--- a/apps/codecs/libspeex/vq.h
+++ b/apps/codecs/libspeex/vq.h
@@ -40,7 +40,6 @@
 int scal_quant(spx_word16_t in, const spx_word16_t *boundary, int entries);
 int scal_quant32(spx_word32_t in, const spx_word32_t *boundary, int entries);
 
-int vq_index(float *in, const float *codebook, int len, int entries);
 #ifdef _USE_SSE
 #include <xmmintrin.h>
 void vq_nbest(spx_word16_t *in, const __m128 *codebook, int len, int entries, __m128 *E, int N, int *nbest, spx_word32_t *best_dist, char *stack);
-- 
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