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[wxWidgets.git] / contrib / src / mmedia / g721.cpp

diff --git a/contrib/src/mmedia/g721.cpp b/contrib/src/mmedia/g721.cpp
index bfc561a7a6272eb09279851f0d2bd2cbcb1d855b..4068c5b85d91414560ea4ae07b391337cd02664b 100644 (file)
--- a/contrib/src/mmedia/g721.cpp
+++ b/contrib/src/mmedia/g721.cpp
@@ -57,19 +57,19 @@ static short qtab_721[7] = {-124, 80, 178, 246, 300, 349, 400};
  * Maps G.721 code word to reconstructed scale factor normalized log
  * magnitude values.
  */
  * Maps G.721 code word to reconstructed scale factor normalized log
  * magnitude values.
  */

-static short   _dqlntab[16] = {-2048, 4, 135, 213, 273, 323, 373, 425,
-                               425, 373, 323, 273, 213, 135, 4, -2048};
+static short _dqlntab[16] = {-2048, 4, 135, 213, 273, 323, 373, 425,
+                425, 373, 323, 273, 213, 135, 4, -2048};

 
 /* Maps G.721 code word to log of scale factor multiplier. */
 
 /* Maps G.721 code word to log of scale factor multiplier. */

-static short   _witab[16] = {-12, 18, 41, 64, 112, 198, 355, 1122,
-                               1122, 355, 198, 112, 64, 41, 18, -12};
+static short _witab[16] = {-12, 18, 41, 64, 112, 198, 355, 1122,
+                1122, 355, 198, 112, 64, 41, 18, -12};

 /*
  * Maps G.721 code words to a set of values whose long and short
  * term averages are computed and then compared to give an indication
  * how stationary (steady state) the signal is.
  */
 /*
  * Maps G.721 code words to a set of values whose long and short
  * term averages are computed and then compared to give an indication
  * how stationary (steady state) the signal is.
  */

-static short   _fitab[16] = {0, 0, 0, 0x200, 0x200, 0x200, 0x600, 0xE00,
-                               0xE00, 0x600, 0x200, 0x200, 0x200, 0, 0, 0};
+static short _fitab[16] = {0, 0, 0, 0x200, 0x200, 0x200, 0x600, 0xE00,
+                0xE00, 0x600, 0x200, 0x200, 0x200, 0, 0, 0};

 
 /*
  * g721_encoder()
 
 /*
  * g721_encoder()


@@ -79,50 +79,50 @@ static short        _fitab[16] = {0, 0, 0, 0x200, 0x200, 0x200, 0x600, 0xE00,
  */
 int
 g721_encoder(
  */
 int
 g721_encoder(

-       int             sl,
-       int             in_coding,
-       struct g72x_state *state_ptr)
+    int                sl,
+    int                in_coding,
+    struct g72x_state *state_ptr)

 {
 {

-       short           sezi, se, sez;          /* ACCUM */
-       short           d;                      /* SUBTA */
-       short           sr;                     /* ADDB */
-       short           y;                      /* MIX */
-       short           dqsez;                  /* ADDC */
-       short           dq, i;
-
-       switch (in_coding) {    /* linearize input sample to 14-bit PCM */
-       case AUDIO_ENCODING_ALAW:
-               sl = alaw2linear(sl) >> 2;
-               break;
-       case AUDIO_ENCODING_ULAW:
-               sl = ulaw2linear(sl) >> 2;
-               break;
-       case AUDIO_ENCODING_LINEAR:
-               sl = ((short)sl) >> 2;          /* 14-bit dynamic range */
-               break;
-       default:
-               return (-1);
-       }
-
-       sezi = predictor_zero(state_ptr);
-       sez = sezi >> 1;
-       se = (sezi + predictor_pole(state_ptr)) >> 1;   /* estimated signal */
-
-       d = sl - se;                            /* estimation difference */
-
-       /* quantize the prediction difference */
-       y = step_size(state_ptr);               /* quantizer step size */
-       i = quantize(d, y, qtab_721, 7);        /* i = ADPCM code */
-
-       dq = reconstruct(i & 8, _dqlntab[i], y);        /* quantized est diff */
-
-       sr = (dq < 0) ? se - (dq & 0x3FFF) : se + dq;   /* reconst. signal */
-
-       dqsez = sr + sez - se;                  /* pole prediction diff. */
-
-       update(4, y, _witab[i] << 5, _fitab[i], dq, sr, dqsez, state_ptr);
-
-       return (i);
+    short        sezi, se, sez;        /* ACCUM */
+    short        d;                    /* SUBTA */
+    short        sr;                   /* ADDB */
+    short        y;                    /* MIX */
+    short        dqsez;                /* ADDC */
+    short        dq, i;
+
+    switch (in_coding) {    /* linearize input sample to 14-bit PCM */
+    case AUDIO_ENCODING_ALAW:
+        sl = alaw2linear(sl) >> 2;
+        break;
+    case AUDIO_ENCODING_ULAW:
+        sl = ulaw2linear(sl) >> 2;
+        break;
+    case AUDIO_ENCODING_LINEAR:
+        sl = ((short)sl) >> 2;        /* 14-bit dynamic range */
+        break;
+    default:
+        return (-1);
+    }
+
+    sezi = predictor_zero(state_ptr);
+    sez = sezi >> 1;
+    se = (sezi + predictor_pole(state_ptr)) >> 1;    /* estimated signal */
+
+    d = sl - se;                /* estimation difference */
+
+    /* quantize the prediction difference */
+    y = step_size(state_ptr);        /* quantizer step size */
+    i = quantize(d, y, qtab_721, 7);    /* i = ADPCM code */
+
+    dq = reconstruct(i & 8, _dqlntab[i], y);    /* quantized est diff */
+
+    sr = (dq < 0) ? se - (dq & 0x3FFF) : se + dq;    /* reconst. signal */
+
+    dqsez = sr + sez - se;            /* pole prediction diff. */
+
+    update(4, y, _witab[i] << 5, _fitab[i], dq, sr, dqsez, state_ptr);
+
+    return (i);

 }
 
 /*
 }
 
 /*


@@ -136,40 +136,40 @@ g721_encoder(
  */
 int
 g721_decoder(
  */
 int
 g721_decoder(

-       int             i,
-       int             out_coding,
-       struct g72x_state *state_ptr)
+    int                i,
+    int                out_coding,
+    struct g72x_state *state_ptr)

 {
 {

-       short           sezi, sei, sez, se;     /* ACCUM */
-       short           y;                      /* MIX */
-       short           sr;                     /* ADDB */
-       short           dq;
-       short           dqsez;
-
-       i &= 0x0f;                      /* mask to get proper bits */
-       sezi = predictor_zero(state_ptr);
-       sez = sezi >> 1;
-       sei = sezi + predictor_pole(state_ptr);
-       se = sei >> 1;                  /* se = estimated signal */
-
-       y = step_size(state_ptr);       /* dynamic quantizer step size */
-
-       dq = reconstruct(i & 0x08, _dqlntab[i], y); /* quantized diff. */
-
-       sr = (dq < 0) ? (se - (dq & 0x3FFF)) : se + dq; /* reconst. signal */
-
-       dqsez = sr - se + sez;                  /* pole prediction diff. */
-
-       update(4, y, _witab[i] << 5, _fitab[i], dq, sr, dqsez, state_ptr);
-
-       switch (out_coding) {
-       case AUDIO_ENCODING_ALAW:
-               return (tandem_adjust_alaw(sr, se, y, i, 8, qtab_721));
-       case AUDIO_ENCODING_ULAW:
-               return (tandem_adjust_ulaw(sr, se, y, i, 8, qtab_721));
-       case AUDIO_ENCODING_LINEAR:
-               return (sr << 2);       /* sr was 14-bit dynamic range */
-       default:
-               return (-1);
-       }
+    short        sezi, sei, sez, se;    /* ACCUM */
+    short        y;                     /* MIX */
+    short        sr;                    /* ADDB */
+    short        dq;
+    short        dqsez;
+
+    i &= 0x0f;            /* mask to get proper bits */
+    sezi = predictor_zero(state_ptr);
+    sez = sezi >> 1;
+    sei = sezi + predictor_pole(state_ptr);
+    se = sei >> 1;            /* se = estimated signal */
+
+    y = step_size(state_ptr);    /* dynamic quantizer step size */
+
+    dq = reconstruct(i & 0x08, _dqlntab[i], y); /* quantized diff. */
+
+    sr = (dq < 0) ? (se - (dq & 0x3FFF)) : se + dq;    /* reconst. signal */
+
+    dqsez = sr - se + sez;            /* pole prediction diff. */
+
+    update(4, y, _witab[i] << 5, _fitab[i], dq, sr, dqsez, state_ptr);
+
+    switch (out_coding) {
+    case AUDIO_ENCODING_ALAW:
+        return (tandem_adjust_alaw(sr, se, y, i, 8, qtab_721));
+    case AUDIO_ENCODING_ULAW:
+        return (tandem_adjust_ulaw(sr, se, y, i, 8, qtab_721));
+    case AUDIO_ENCODING_LINEAR:
+        return (sr << 2);    /* sr was 14-bit dynamic range */
+    default:
+        return (-1);
+    }

 }
 }