X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/e8482f24cfc00645607f8526fde38d39e0dcaa63..b9bae707bbf7ca87f0efdbf3c5a656a4d1f134e3:/contrib/src/mmedia/g711.cpp?ds=sidebyside

diff --git a/contrib/src/mmedia/g711.cpp b/contrib/src/mmedia/g711.cpp
index 99fb3cafc0..60517b2eb0 100644
--- a/contrib/src/mmedia/g711.cpp
+++ b/contrib/src/mmedia/g711.cpp
@@ -24,72 +24,72 @@
  * Mountain View, California  94043
  */
 
-#include <wx/wxprec.h>
+#include "wx/wxprec.h"
 
 /*
  * 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,
-			    0xFFF, 0x1FFF, 0x3FFF, 0x7FFF};
+                           0xFFF, 0x1FFF, 0x3FFF, 0x7FFF};
 
 /* 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(
-	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.
  *
- *		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(
-	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(
-	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
@@ -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:
  *
- *	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
@@ -205,34 +205,34 @@ alaw2linear(
  */
 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(
-	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(
-	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(
-	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)));
 }