From e43c1ac338fa57b874c17238452e5fcfa5481489 Mon Sep 17 00:00:00 2001
From: Thom Johansen <thomj@rockbox.org>
Date: Fri, 9 Nov 2007 01:11:34 +0000
Subject: Remove some unneeded floating point usage, port some needed floating
 point code to fixed point.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@15547 a1c6a512-1295-4272-9138-f99709370657
---
 apps/codecs/libspeex/arch.h            |  4 +---
 apps/codecs/libspeex/nb_celp.c         | 19 +++++++++++++------
 apps/codecs/libspeex/speex_callbacks.c |  3 +++
 3 files changed, 17 insertions(+), 9 deletions(-)

(limited to 'apps/codecs')

diff --git a/apps/codecs/libspeex/arch.h b/apps/codecs/libspeex/arch.h
index e2d731acc0..1e48e93388 100644
--- a/apps/codecs/libspeex/arch.h
+++ b/apps/codecs/libspeex/arch.h
@@ -68,6 +68,7 @@ typedef spx_word32_t spx_sig_t;
 #define LPC_SHIFT    13
 #define LSP_SHIFT    13
 #define SIG_SHIFT    14
+#define GAIN_SHIFT   6
 
 #define VERY_SMALL 0
 #define VERY_LARGE32 ((spx_word32_t)2147483647)
@@ -111,9 +112,6 @@ typedef float spx_word32_t;
 #define GAIN_SCALING 1.f
 #define GAIN_SCALING_1 1.f
 
-#define LPC_SHIFT    0
-#define LSP_SHIFT    0
-#define SIG_SHIFT    0
 
 #define VERY_SMALL 1e-15f
 #define VERY_LARGE32 1e15f
diff --git a/apps/codecs/libspeex/nb_celp.c b/apps/codecs/libspeex/nb_celp.c
index 4751068153..f3810894e1 100644
--- a/apps/codecs/libspeex/nb_celp.c
+++ b/apps/codecs/libspeex/nb_celp.c
@@ -665,13 +665,17 @@ int nb_encode(void *state, void *vin, SpeexBits *bits)
    if (SUBMODE(forced_pitch_gain))
    {
       int quant;
+#ifdef FIXED_POINT
+      quant = PSHR16(MULT16_16_16(15, ol_pitch_coef),GAIN_SHIFT);
+#else
       quant = (int)floor(.5+15*ol_pitch_coef*GAIN_SCALING_1);
+#endif
       if (quant>15)
          quant=15;
       if (quant<0)
          quant=0;
       speex_bits_pack(bits, quant, 4);
-      ol_pitch_coef=GAIN_SCALING*0.066667*quant;
+      ol_pitch_coef=MULT16_16_P15(QCONST16(0.066667,15),SHL16(quant,GAIN_SHIFT));
    }
    
    
@@ -1410,7 +1414,7 @@ int nb_decode(void *state, SpeexBits *bits, void *vout)
    {
       int quant;
       quant = speex_bits_unpack_unsigned(bits, 4);
-      ol_pitch_coef=GAIN_SCALING*0.066667*quant;
+      ol_pitch_coef=MULT16_16_P15(QCONST16(0.066667,15),SHL16(quant,GAIN_SHIFT));
    }
    
    /* Get global excitation gain */
@@ -1572,11 +1576,9 @@ int nb_decode(void *state, SpeexBits *bits, void *vout)
             /*Fixed codebook contribution*/
             SUBMODE(innovation_unquant)(innov, SUBMODE(innovation_params), st->subframeSize, bits, stack, &st->seed);
             /* De-normalize innovation and update excitation */
-#ifdef FIXED_POINT
-            signal_mul(innov, innov, ener, st->subframeSize);
-#else
+
             signal_mul(innov, innov, ener, st->subframeSize);
-#endif
+
             /* Decode second codebook (only for some modes) */
             if (SUBMODE(double_codebook))
             {
@@ -2026,6 +2028,8 @@ int nb_decoder_ctl(void *state, int request, void *ptr)
       break;
    case SPEEX_GET_ACTIVITY:
    {
+      /* We don't use this, dummy it out to get rid of the float stuff */
+#if 0 
       float ret;
       ret = log(st->level/st->min_level)/log(st->max_level/st->min_level);
       if (ret>1)
@@ -2035,6 +2039,9 @@ int nb_decoder_ctl(void *state, int request, void *ptr)
          ret = 0;
       /*printf ("%f %f %f %f\n", st->level, st->min_level, st->max_level, ret);*/
       (*(spx_int32_t*)ptr) = (int)(100*ret);
+#else
+      (*(spx_int32_t*)ptr) = (int)(0);
+#endif
    }
    break;
    case SPEEX_GET_PI_GAIN:
diff --git a/apps/codecs/libspeex/speex_callbacks.c b/apps/codecs/libspeex/speex_callbacks.c
index 9883d72e50..ca29e1b32b 100644
--- a/apps/codecs/libspeex/speex_callbacks.c
+++ b/apps/codecs/libspeex/speex_callbacks.c
@@ -114,9 +114,12 @@ int speex_std_enh_request_handler(SpeexBits *bits, void *state, void *data)
 
 int speex_std_vbr_quality_request_handler(SpeexBits *bits, void *state, void *data)
 {
+   /* We don't use this, get rid of the float reference */
+#if 0
    float qual;
    qual = speex_bits_unpack_unsigned(bits, 4);
    speex_encoder_ctl(data, SPEEX_SET_VBR_QUALITY, &qual);
+#endif
    return 0;
 }
 
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