Maintenance and minor speedup of libwmapro. Comment unused arrays, fix comment, remove tabs and introduce WMAPRO_FRACT to wma.h to remove magic numbers. Swap operands of fixmul16-call for minor speedup on ARM (+1%).

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@27617 a1c6a512-1295-4272-9138-f99709370657

apps/codecs/libwmapro/wma.c

@@ -116,7 +116,7 @@ int ff_wma_run_level_decode(GetBitContext* gb,
             offset += run_table[code];
             sign = !get_bits1(gb);
             ptr[offset & coef_mask] = sign ? -level_table[code] : level_table[code];
-            ptr[offset & coef_mask] <<= 17;
+            ptr[offset & coef_mask] <<= WMAPRO_FRACT;
         } else if (code == 1) {
             /** EOB */
             break;
@@ -144,7 +144,7 @@ int ff_wma_run_level_decode(GetBitContext* gb,
             }
             sign = !get_bits1(gb);
             ptr[offset & coef_mask] = sign ? -level : level;
-            ptr[offset & coef_mask] <<=17;
+            ptr[offset & coef_mask] <<= WMAPRO_FRACT;
         }
     }
     /** NOTE: EOB can be omitted */

apps/codecs/libwmapro/wma.h

@@ -25,6 +25,8 @@
 #include "ffmpeg_get_bits.h"
 #include "ffmpeg_put_bits.h"
 
+#define WMAPRO_FRACT (17)
+
 /* size of blocks */
 #define BLOCK_MIN_BITS 7
 #define BLOCK_MAX_BITS 11

apps/codecs/libwmapro/wmapro_math.h

@@ -276,7 +276,7 @@ static inline void vector_fixmul_window(int32_t *dst, const int32_t *src0,
         dst[i+1] = fixmul24(src[i+1], mul); \
         dst[i+2] = fixmul24(src[i+2], mul); \
         dst[i+3] = fixmul24(src[i+3], mul);
-#endif /* CPU_ARM */
+#endif /* CPU_ARM, CPU_COLDFIRE */
 
 static inline void vector_fixmul_scalar(int32_t *dst, const int32_t *src, 
                                         int32_t mul, int len)

apps/codecs/libwmapro/wmaprodata.h

@@ -31,6 +31,7 @@
 #include <stddef.h>
 #include <stdint.h>
 
+/* rockbox: not used
 const int32_t fixed_sin64[33] = {
     0x00000000, 0xF9B82685, 0xF3742CA3, 0xED37EF92, 0xE70747C5, 0xE0E60686, 
     0xDAD7F3A3, 0xD4E0CB16, 0xCF043AB4, 0xC945DFED, 0xC3A94591, 0xBE31E19C, 
@@ -39,7 +40,7 @@ const int32_t fixed_sin64[33] = {
     0x89BE50C4, 0x877B7BED, 0x8582FAA6, 0x83D60413, 0x8275A0C1, 0x8162AA05, 
     0x809DC972, 0x80277873, 0x80000001, 
 };
-
+*/
 /**
  * @brief frequencies to divide the frequency spectrum into scale factor bands
  */
@@ -50,7 +51,6 @@ static const uint16_t critical_freq[] = {
     9500, 12000,  15500,  20675,  28575,  41375,  63875,
 };
 
-
 /**
  * @name Huffman tables for DPCM-coded scale factors
  * @{
@@ -581,6 +581,7 @@ static const uint8_t symbol_to_vec2[HUFF_VEC2_SIZE] = {
 /**
  * @brief decorrelation matrix for multichannel streams
  **/
+/* rockbox: not used
 static const float default_decorrelation_matrices[] = {
     1.000000,  0.707031, -0.707031,  0.707031,  0.707031,  0.578125,  0.707031,
     0.410156,  0.578125, -0.707031,  0.410156,  0.578125,  0.000000, -0.816406,
@@ -596,10 +597,11 @@ static const float default_decorrelation_matrices[] = {
     0.289062, -0.558594,  0.410156, -0.410156,  0.000000,  0.410156, -0.578125,
     0.410156,  0.410156, -0.558594,  0.500000, -0.410156,  0.289062, -0.148438,
 };
-
+*/
 /**
  * @brief default decorrelation matrix offsets
  */
+/* rockbox: not used
 static const float * const default_decorrelation[] = {
     NULL,
     &default_decorrelation_matrices[0],
@@ -609,5 +611,5 @@ static const float * const default_decorrelation[] = {
     &default_decorrelation_matrices[30],
     &default_decorrelation_matrices[55]
 };
-
+*/
 #endif /* AVCODEC_WMAPRODATA_H */

apps/codecs/libwmapro/wmaprodec.c

@@ -877,7 +877,7 @@ static int decode_coeffs(WMAProDecodeCtx *s, int c)
         for (i = 0; i < 4; i++) {
             if (vals[i]) {
                 int sign = get_bits1(&s->gb) - 1;
-                ci->coeffs[cur_coeff] = (sign == -1)? -vals[i]<<17 : vals[i]<<17;
+                ci->coeffs[cur_coeff] = (sign == -1)? -vals[i]<<WMAPRO_FRACT : vals[i]<<WMAPRO_FRACT;
                 num_zeros = 0;
             } else {
                 ci->coeffs[cur_coeff] = 0;
@@ -1035,7 +1035,7 @@ static void inverse_channel_transform(WMAProDecodeCtx *s)
                             data_ptr = data;
                                 
                             while (data_ptr < data_end)
-                                sum += fixmul16(*data_ptr++, *mat++);
+                                sum += fixmul16(*mat++, *data_ptr++);
 
                             (*ch)[y] = sum;
                         }

apps/codecs/libwmapro/wmaprodec.h

@@ -1,4 +1,5 @@
 #include "codeclib.h"
+#include "wma.h"
 #include "../libasf/asf.h"
 
 #if   (CONFIG_CPU == MCF5250) || defined(CPU_S5L870X)

apps/codecs/wmapro.c

@@ -44,7 +44,7 @@ enum codec_status codec_main(void)
     int size;                   /* Size of the input frame to the decoder */
 
     /* Generic codec initialisation */
-    ci->configure(DSP_SET_SAMPLE_DEPTH, 17);
+    ci->configure(DSP_SET_SAMPLE_DEPTH, WMAPRO_FRACT);
     
 
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