From 98f0d7787906e91d50c3f1d435df9fd8fcaccc31 Mon Sep 17 00:00:00 2001
From: Michael Giacomelli <giac2000@hotmail.com>
Date: Mon, 6 Aug 2007 01:43:09 +0000
Subject: Clean up VLC functions.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@14206 a1c6a512-1295-4272-9138-f99709370657
---
 apps/codecs/libwma/bitstream.c | 19 ++++++-------------
 apps/codecs/libwma/wmadeci.c   | 21 ++++++++++-----------
 2 files changed, 16 insertions(+), 24 deletions(-)

(limited to 'apps')

diff --git a/apps/codecs/libwma/bitstream.c b/apps/codecs/libwma/bitstream.c
index bce7ee2ae6..78b078adc7 100644
--- a/apps/codecs/libwma/bitstream.c
+++ b/apps/codecs/libwma/bitstream.c
@@ -119,8 +119,7 @@ static int build_table(VLC *vlc, int table_nb_bits,
                        const void *codes, int codes_wrap, int codes_size,
                        uint32_t code_prefix, int n_prefix)
 {
-    int i, j, k, n, table_size, table_index, nb, n1, index;
-    uint32_t code_prefix2;
+    int i, j, k, n, table_size, table_index, nb, n1, index, code_prefix2;
     uint32_t code;
     int flags = 0;
     VLC_TYPE (*table)[2];
@@ -153,10 +152,10 @@ static int build_table(VLC *vlc, int table_nb_bits,
         /* if code matches the prefix, it is in the table */
         n -= n_prefix;
         if(flags & INIT_VLC_LE)
-            code_prefix2= code & (n_prefix>=32 ? 0xffffffff : (uint32_t)( (1 << n_prefix)-1));
+            code_prefix2= code & (n_prefix>=32 ? 0xffffffff : (uint32_t)(1 << n_prefix)-1);
         else
             code_prefix2= code >> n;
-        if (n > 0 && code_prefix2 == code_prefix) {
+        if (n > 0 && (int)code_prefix2 == code_prefix) {
             if (n <= table_nb_bits) {
                 /* no need to add another table */
                 j = (code << (table_nb_bits - n)) & (table_size - 1);
@@ -165,11 +164,10 @@ static int build_table(VLC *vlc, int table_nb_bits,
                     if(flags & INIT_VLC_LE)
                         j = (code >> n_prefix) + (k<<n);
 #ifdef DEBUG_VLC
-                    av_log(NULL, AV_LOG_DEBUG, "%4x: code=%d n=%d\n",
+                    av_log(NULL, 0, "%4x: code=%d n=%d\n",
                            j, i, n);
 #endif
                     if (table[j][1] /*bits*/ != 0) {
-                       // av_log(NULL, AV_LOG_ERROR, "incorrect codes\n");
                         return -1;
                     }
                     table[j][1] = n; //bits
@@ -180,7 +178,7 @@ static int build_table(VLC *vlc, int table_nb_bits,
                 n -= table_nb_bits;
                 j = (code >> ((flags & INIT_VLC_LE) ? n_prefix : n)) & ((1 << table_nb_bits) - 1);
 #ifdef DEBUG_VLC
-                printf("%4x: n=%d (subtable)\n",
+                av_log(NULL, 0,"%4x: n=%d (subtable)\n",
                        j, n);
 #endif
                 /* compute table size */
@@ -267,9 +265,4 @@ int init_vlc(VLC *vlc, int nb_bits, int nb_codes,
     return flags;
 }
 
-/*
-void free_vlc(VLC *vlc)
-{
-    av_free(vlc->table);
-}
-*/
+
diff --git a/apps/codecs/libwma/wmadeci.c b/apps/codecs/libwma/wmadeci.c
index f14fbc8197..b867e5c6f1 100644
--- a/apps/codecs/libwma/wmadeci.c
+++ b/apps/codecs/libwma/wmadeci.c
@@ -30,10 +30,10 @@
 #include "bitstream.h"
 
 
-#define VLCBITS 9
+#define VLCBITS 7		/*7 is the lowest without glitching*/
 #define VLCMAX ((22+VLCBITS-1)/VLCBITS)
 
-#define EXPVLCBITS 9
+#define EXPVLCBITS 7
 #define EXPMAX ((19+EXPVLCBITS-1)/EXPVLCBITS)
 
 #define HGAINVLCBITS 9
@@ -140,11 +140,12 @@ uint16_t runtab0[1336], runtab1[1336], levtab0[1336], levtab1[1336];
 
 FFTComplex mdct_tmp[1] ;              /* dummy var */
 
-//may also be too large by ~ 1KB each?
-static VLC_TYPE vlcbuf1[6144][2];
-static VLC_TYPE vlcbuf2[3584][2];
-static VLC_TYPE vlcbuf3[1536][2] IBSS_ATTR;    //small so lets try iram
-static VLC_TYPE vlcbuf4[540][2];
+
+/*putting these in IRAM actually makes PP slower*/
+VLC_TYPE vlcbuf1[2550][2];
+VLC_TYPE vlcbuf2[2550][2];
+VLC_TYPE vlcbuf3[360][2];
+VLC_TYPE vlcbuf4[540][2];
 
 
 
@@ -877,8 +878,7 @@ int wma_decode_init(WMADecodeContext* s, asf_waveformatex_t *wfx)
 #endif
 
          s->hgain_vlc.table = vlcbuf4;
-         s->hgain_vlc.table_allocated = 540;
-         init_vlc(&s->hgain_vlc, 9, sizeof(hgain_huffbits),
+         init_vlc(&s->hgain_vlc, HGAINVLCBITS, sizeof(hgain_huffbits),
                   hgain_huffbits, 1, 1,
                   hgain_huffcodes, 2, 2, 0);
     }
@@ -887,9 +887,8 @@ int wma_decode_init(WMADecodeContext* s, asf_waveformatex_t *wfx)
     {
 
         s->exp_vlc.table = vlcbuf3;
-        s->exp_vlc.table_allocated = 1536;
 
-         init_vlc(&s->exp_vlc, 9, sizeof(scale_huffbits),
+         init_vlc(&s->exp_vlc, EXPVLCBITS, sizeof(scale_huffbits),
                   scale_huffbits, 1, 1,
                   scale_huffcodes, 4, 4, 0);
     }
-- 
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