corrected version number extraction

[wxWidgets.git] / contrib / src / mmedia / g711.cpp

diff --git a/contrib/src/mmedia/g711.cpp b/contrib/src/mmedia/g711.cpp
index 99fb3cafc0b90e75788ebce396f201e5046bcaaf..60517b2eb02a7af7c247d3819a8cdffc0612c649 100644 (file)
--- a/contrib/src/mmedia/g711.cpp
+++ b/contrib/src/mmedia/g711.cpp
@@ -24,72 +24,72 @@
  * Mountain View, California  94043
  */
 
  * Mountain View, California  94043
  */
 

-#include <wx/wxprec.h>
+#include "wx/wxprec.h"

 
 /*
  * g711.c
  *
  * u-law, A-law and linear PCM conversions.
  */
 
 /*
  * g711.c
  *
  * u-law, A-law and linear PCM conversions.
  */

-#define        SIGN_BIT        (0x80)          /* Sign bit for a A-law byte. */
-#define        QUANT_MASK      (0xf)           /* Quantization field mask. */
-#define        NSEGS           (8)             /* Number of A-law segments. */
-#define        SEG_SHIFT       (4)             /* Left shift for segment number. */
-#define        SEG_MASK        (0x70)          /* Segment field mask. */
+#define    SIGN_BIT    (0x80)        /* Sign bit for a A-law byte. */
+#define    QUANT_MASK  (0xf)         /* Quantization field mask. */
+#define    NSEGS       (8)           /* Number of A-law segments. */
+#define    SEG_SHIFT   (4)           /* Left shift for segment number. */
+#define    SEG_MASK    (0x70)        /* Segment field mask. */

 
 static short seg_end[8] = {0xFF, 0x1FF, 0x3FF, 0x7FF,
 
 static short seg_end[8] = {0xFF, 0x1FF, 0x3FF, 0x7FF,

-                           0xFFF, 0x1FFF, 0x3FFF, 0x7FFF};
+                           0xFFF, 0x1FFF, 0x3FFF, 0x7FFF};

 
 /* copy from CCITT G.711 specifications */
 
 /* copy from CCITT G.711 specifications */

-unsigned char _u2a[128] = {                    /* u- to A-law conversions */
-       1,      1,      2,      2,      3,      3,      4,      4,
-       5,      5,      6,      6,      7,      7,      8,      8,
-       9,      10,     11,     12,     13,     14,     15,     16,
-       17,     18,     19,     20,     21,     22,     23,     24,
-       25,     27,     29,     31,     33,     34,     35,     36,
-       37,     38,     39,     40,     41,     42,     43,     44,
-       46,     48,     49,     50,     51,     52,     53,     54,
-       55,     56,     57,     58,     59,     60,     61,     62,
-       64,     65,     66,     67,     68,     69,     70,     71,
-       72,     73,     74,     75,     76,     77,     78,     79,
-       81,     82,     83,     84,     85,     86,     87,     88,
-       89,     90,     91,     92,     93,     94,     95,     96,
-       97,     98,     99,     100,    101,    102,    103,    104,
-       105,    106,    107,    108,    109,    110,    111,    112,
-       113,    114,    115,    116,    117,    118,    119,    120,
-       121,    122,    123,    124,    125,    126,    127,    128};
+unsigned char _u2a[128] = {            /* u- to A-law conversions */
+     1,     1,     2,     2,     3,     3,     4,     4,
+     5,     5,     6,     6,     7,     7,     8,     8,
+     9,    10,    11,    12,    13,    14,    15,    16,
+    17,    18,    19,    20,    21,    22,    23,    24,
+    25,    27,    29,    31,    33,    34,    35,    36,
+    37,    38,    39,    40,    41,    42,    43,    44,
+    46,    48,    49,    50,    51,    52,    53,    54,
+    55,    56,    57,    58,    59,    60,    61,    62,
+    64,    65,    66,    67,    68,    69,    70,    71,
+    72,    73,    74,    75,    76,    77,    78,    79,
+    81,    82,    83,    84,    85,    86,    87,    88,
+    89,    90,    91,    92,    93,    94,    95,    96,
+    97,    98,    99,   100,   101,   102,   103,   104,
+   105,   106,   107,   108,   109,   110,   111,   112,
+   113,   114,   115,   116,   117,   118,   119,   120,
+   121,   122,   123,   124,   125,   126,   127,   128};

 
 

-unsigned char _a2u[128] = {                    /* A- to u-law conversions */
-       1,      3,      5,      7,      9,      11,     13,     15,
-       16,     17,     18,     19,     20,     21,     22,     23,
-       24,     25,     26,     27,     28,     29,     30,     31,
-       32,     32,     33,     33,     34,     34,     35,     35,
-       36,     37,     38,     39,     40,     41,     42,     43,
-       44,     45,     46,     47,     48,     48,     49,     49,
-       50,     51,     52,     53,     54,     55,     56,     57,
-       58,     59,     60,     61,     62,     63,     64,     64,
-       65,     66,     67,     68,     69,     70,     71,     72,
-       73,     74,     75,     76,     77,     78,     79,     79,
-       80,     81,     82,     83,     84,     85,     86,     87,
-       88,     89,     90,     91,     92,     93,     94,     95,
-       96,     97,     98,     99,     100,    101,    102,    103,
-       104,    105,    106,    107,    108,    109,    110,    111,
-       112,    113,    114,    115,    116,    117,    118,    119,
-       120,    121,    122,    123,    124,    125,    126,    127};
+unsigned char _a2u[128] = {            /* A- to u-law conversions */
+     1,     3,     5,     7,     9,    11,    13,    15,
+    16,    17,    18,    19,    20,    21,    22,    23,
+    24,    25,    26,    27,    28,    29,    30,    31,
+    32,    32,    33,    33,    34,    34,    35,    35,
+    36,    37,    38,    39,    40,    41,    42,    43,
+    44,    45,    46,    47,    48,    48,    49,    49,
+    50,    51,    52,    53,    54,    55,    56,    57,
+    58,    59,    60,    61,    62,    63,    64,    64,
+    65,    66,    67,    68,    69,    70,    71,    72,
+    73,    74,    75,    76,    77,    78,    79,    79,
+    80,    81,    82,    83,    84,    85,    86,    87,
+    88,    89,    90,    91,    92,    93,    94,    95,
+    96,    97,    98,    99,   100,   101,   102,   103,
+   104,   105,   106,   107,   108,   109,   110,   111,
+   112,   113,   114,   115,   116,   117,   118,   119,
+   120,   121,   122,   123,   124,   125,   126,   127};

 
 static int
 search(
 
 static int
 search(

-       int             val,
-       short           *table,
-       int             size)
+    int        val,
+    short     *table,
+    int        size)

 {
 {

-       int             i;
+    int i;

 
 

-       for (i = 0; i < size; i++) {
-               if (val <= *table++)
-                       return (i);
-       }
-       return (size);
+    for (i = 0; i < size; i++) {
+        if (val <= *table++)
+            return (i);
+    }
+    return (size);

 }
 
 /*
 }
 
 /*


@@ -97,50 +97,50 @@ search(
  *
  * linear2alaw() accepts an 16-bit integer and encodes it as A-law data.
  *
  *
  * linear2alaw() accepts an 16-bit integer and encodes it as A-law data.
  *

- *             Linear Input Code       Compressed Code
- *     ------------------------        ---------------
- *     0000000wxyza                    000wxyz
- *     0000001wxyza                    001wxyz
- *     000001wxyzab                    010wxyz
- *     00001wxyzabc                    011wxyz
- *     0001wxyzabcd                    100wxyz
- *     001wxyzabcde                    101wxyz
- *     01wxyzabcdef                    110wxyz
- *     1wxyzabcdefg                    111wxyz
+ *        Linear Input Code       Compressed Code
+ *    ------------------------    ---------------
+ *    0000000wxyza                    000wxyz
+ *    0000001wxyza                    001wxyz
+ *    000001wxyzab                    010wxyz
+ *    00001wxyzabc                    011wxyz
+ *    0001wxyzabcd                    100wxyz
+ *    001wxyzabcde                    101wxyz
+ *    01wxyzabcdef                    110wxyz
+ *    1wxyzabcdefg                    111wxyz

  *
  * For further information see John C. Bellamy's Digital Telephony, 1982,
  * John Wiley & Sons, pps 98-111 and 472-476.
  */
 unsigned char
 linear2alaw(
  *
  * For further information see John C. Bellamy's Digital Telephony, 1982,
  * John Wiley & Sons, pps 98-111 and 472-476.
  */
 unsigned char
 linear2alaw(

-       int             pcm_val)        /* 2's complement (16-bit range) */
+    int        pcm_val)    /* 2's complement (16-bit range) */

 {
 {

-       int             mask;
-       int             seg;
-       unsigned char   aval;
+    int              mask;
+    int              seg;
+    unsigned char    aval;

 
 

-       if (pcm_val >= 0) {
-               mask = 0xD5;            /* sign (7th) bit = 1 */
-       } else {
-               mask = 0x55;            /* sign bit = 0 */
-               pcm_val = -pcm_val - 8;
-       }
+    if (pcm_val >= 0) {
+        mask = 0xD5;        /* sign (7th) bit = 1 */
+    } else {
+        mask = 0x55;        /* sign bit = 0 */
+        pcm_val = -pcm_val - 8;
+    }

 
 

-       /* Convert the scaled magnitude to segment number. */
-       seg = search(pcm_val, seg_end, 8);
+    /* Convert the scaled magnitude to segment number. */
+    seg = search(pcm_val, seg_end, 8);

 
 

-       /* Combine the sign, segment, and quantization bits. */
+    /* Combine the sign, segment, and quantization bits. */

 
 

-       if (seg >= 8)           /* out of range, return maximum value. */
-               return (0x7F ^ mask);
-       else {
-               aval = seg << SEG_SHIFT;
-               if (seg < 2)
-                       aval |= (pcm_val >> 4) & QUANT_MASK;
-               else
-                       aval |= (pcm_val >> (seg + 3)) & QUANT_MASK;
-               return (aval ^ mask);
-       }
+    if (seg >= 8)        /* out of range, return maximum value. */
+        return (0x7F ^ mask);
+    else {
+        aval = seg << SEG_SHIFT;
+        if (seg < 2)
+            aval |= (pcm_val >> 4) & QUANT_MASK;
+        else
+            aval |= (pcm_val >> (seg + 3)) & QUANT_MASK;
+        return (aval ^ mask);
+    }

 }
 
 /*
 }
 
 /*


@@ -149,30 +149,30 @@ linear2alaw(
  */
 int
 alaw2linear(
  */
 int
 alaw2linear(

-       unsigned char   a_val)
+    unsigned char    a_val)

 {
 {

-       int             t;
-       int             seg;
+    int        t;
+    int        seg;

 
 

-       a_val ^= 0x55;
+    a_val ^= 0x55;

 
 

-       t = (a_val & QUANT_MASK) << 4;
-       seg = ((unsigned)a_val & SEG_MASK) >> SEG_SHIFT;
-       switch (seg) {
-       case 0:
-               t += 8;
-               break;
-       case 1:
-               t += 0x108;
-               break;
-       default:
-               t += 0x108;
-               t <<= seg - 1;
-       }
-       return ((a_val & SIGN_BIT) ? t : -t);
+    t = (a_val & QUANT_MASK) << 4;
+    seg = ((unsigned)a_val & SEG_MASK) >> SEG_SHIFT;
+    switch (seg) {
+    case 0:
+        t += 8;
+        break;
+    case 1:
+        t += 0x108;
+        break;
+    default:
+        t += 0x108;
+        t <<= seg - 1;
+    }
+    return ((a_val & SIGN_BIT) ? t : -t);

 }
 
 }
 

-#define        BIAS            (0x84)          /* Bias for linear code. */
+#define    BIAS        (0x84)        /* Bias for linear code. */

 
 /*
  * linear2ulaw() - Convert a linear PCM value to u-law
 
 /*
  * linear2ulaw() - Convert a linear PCM value to u-law


@@ -181,16 +181,16 @@ alaw2linear(
  * is biased by adding 33 which shifts the encoding range from (0 - 8158) to
  * (33 - 8191). The result can be seen in the following encoding table:
  *
  * is biased by adding 33 which shifts the encoding range from (0 - 8158) to
  * (33 - 8191). The result can be seen in the following encoding table:
  *

- *     Biased Linear Input Code        Compressed Code
- *     ------------------------        ---------------
- *     00000001wxyza                   000wxyz
- *     0000001wxyzab                   001wxyz
- *     000001wxyzabc                   010wxyz
- *     00001wxyzabcd                   011wxyz
- *     0001wxyzabcde                   100wxyz
- *     001wxyzabcdef                   101wxyz
- *     01wxyzabcdefg                   110wxyz
- *     1wxyzabcdefgh                   111wxyz
+ *    Biased Linear Input Code    Compressed Code
+ *    ------------------------    ---------------
+ *    00000001wxyza                   000wxyz
+ *    0000001wxyzab                   001wxyz
+ *    000001wxyzabc                   010wxyz
+ *    00001wxyzabcd                   011wxyz
+ *    0001wxyzabcde                   100wxyz
+ *    001wxyzabcdef                   101wxyz
+ *    01wxyzabcdefg                   110wxyz
+ *    1wxyzabcdefgh                   111wxyz

  *
  * Each biased linear code has a leading 1 which identifies the segment
  * number. The value of the segment number is equal to 7 minus the number
  *
  * Each biased linear code has a leading 1 which identifies the segment
  * number. The value of the segment number is equal to 7 minus the number


@@ -205,34 +205,34 @@ alaw2linear(
  */
 unsigned char
 linear2ulaw(
  */
 unsigned char
 linear2ulaw(

-       int             pcm_val)        /* 2's complement (16-bit range) */
+    int        pcm_val)    /* 2's complement (16-bit range) */

 {
 {

-       int             mask;
-       int             seg;
-       unsigned char   uval;
+    int              mask;
+    int              seg;
+    unsigned char    uval;

 
 

-       /* Get the sign and the magnitude of the value. */
-       if (pcm_val < 0) {
-               pcm_val = BIAS - pcm_val;
-               mask = 0x7F;
-       } else {
-               pcm_val += BIAS;
-               mask = 0xFF;
-       }
+    /* Get the sign and the magnitude of the value. */
+    if (pcm_val < 0) {
+        pcm_val = BIAS - pcm_val;
+        mask = 0x7F;
+    } else {
+        pcm_val += BIAS;
+        mask = 0xFF;
+    }

 
 

-       /* Convert the scaled magnitude to segment number. */
-       seg = search(pcm_val, seg_end, 8);
+    /* Convert the scaled magnitude to segment number. */
+    seg = search(pcm_val, seg_end, 8);

 
 

-       /*
-        * Combine the sign, segment, quantization bits;
-        * and complement the code word.
-        */
-       if (seg >= 8)           /* out of range, return maximum value. */
-               return (0x7F ^ mask);
-       else {
-               uval = (seg << 4) | ((pcm_val >> (seg + 3)) & 0xF);
-               return (uval ^ mask);
-       }
+    /*
+     * Combine the sign, segment, quantization bits;
+     * and complement the code word.
+     */
+    if (seg >= 8)        /* out of range, return maximum value. */
+        return (0x7F ^ mask);
+    else {
+        uval = (seg << 4) | ((pcm_val >> (seg + 3)) & 0xF);
+        return (uval ^ mask);
+    }

 
 }
 
 
 }
 


@@ -247,39 +247,39 @@ linear2ulaw(
  */
 int
 ulaw2linear(
  */
 int
 ulaw2linear(

-       unsigned char   u_val)
+    unsigned char    u_val)

 {
 {

-       int             t;
+    int t;

 
 

-       /* Complement to obtain normal u-law value. */
-       u_val = ~u_val;
+    /* Complement to obtain normal u-law value. */
+    u_val = ~u_val;

 
 

-       /*
-        * Extract and bias the quantization bits. Then
-        * shift up by the segment number and subtract out the bias.
-        */
-       t = ((u_val & QUANT_MASK) << 3) + BIAS;
-       t <<= ((unsigned)u_val & SEG_MASK) >> SEG_SHIFT;
+    /*
+     * Extract and bias the quantization bits. Then
+     * shift up by the segment number and subtract out the bias.
+     */
+    t = ((u_val & QUANT_MASK) << 3) + BIAS;
+    t <<= ((unsigned)u_val & SEG_MASK) >> SEG_SHIFT;

 
 

-       return ((u_val & SIGN_BIT) ? (BIAS - t) : (t - BIAS));
+    return ((u_val & SIGN_BIT) ? (BIAS - t) : (t - BIAS));

 }
 
 /* A-law to u-law conversion */
 unsigned char
 alaw2ulaw(
 }
 
 /* A-law to u-law conversion */
 unsigned char
 alaw2ulaw(

-       unsigned char   aval)
+    unsigned char    aval)

 {
 {

-       aval &= 0xff;
-       return ((aval & 0x80) ? (0xFF ^ _a2u[aval ^ 0xD5]) :
-           (0x7F ^ _a2u[aval ^ 0x55]));
+    aval &= 0xff;
+    return ((aval & 0x80) ? (0xFF ^ _a2u[aval ^ 0xD5]) :
+        (0x7F ^ _a2u[aval ^ 0x55]));

 }
 
 /* u-law to A-law conversion */
 unsigned char
 ulaw2alaw(
 }
 
 /* u-law to A-law conversion */
 unsigned char
 ulaw2alaw(

-       unsigned char   uval)
+    unsigned char    uval)

 {
 {

-       uval &= 0xff;
-       return ((uval & 0x80) ? (0xD5 ^ (_u2a[0xFF ^ uval] - 1)) :
-           (0x55 ^ (_u2a[0x7F ^ uval] - 1)));
+    uval &= 0xff;
+    return ((uval & 0x80) ? (0xD5 ^ (_u2a[0xFF ^ uval] - 1)) :
+        (0x55 ^ (_u2a[0x7F ^ uval] - 1)));

 }
 }