try to give TrueSpeech decoder tables more sensible names

Originally committed as revision 25681 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/truespeech.c

@@ -165,7 +165,7 @@ static void truespeech_correlate_filter(TSContext *dec)
         dec->cvector[i] = (8 - dec->vector[i]) >> 3;
     }
     for(i = 0; i < 8; i++)
-        dec->cvector[i] = (dec->cvector[i] * ts_230[i]) >> 15;
+        dec->cvector[i] = (dec->cvector[i] * ts_decay_994_1000[i]) >> 15;
 
     dec->filtval = dec->vector[0];
 }
@@ -207,7 +207,7 @@ static void truespeech_apply_twopoint_filter(TSContext *dec, int quart)
     off = (t / 25) + dec->offset1[quart >> 1] + 18;
     ptr0 = tmp + 145 - off;
     ptr1 = tmp + 146;
-    filter = (const int16_t*)ts_240 + (t % 25) * 2;
+    filter = (const int16_t*)ts_order2_coeffs + (t % 25) * 2;
     for(i = 0; i < 60; i++){
         t = (ptr0[0] * filter[0] + ptr0[1] * filter[1] + 0x2000) >> 14;
         ptr0++;
@@ -228,11 +228,11 @@ static void truespeech_place_pulses(TSContext *dec, int16_t *out, int quart)
     for(i = 0; i < 7; i++) {
         t = dec->pulseval[quart] & 3;
         dec->pulseval[quart] >>= 2;
-        tmp[6 - i] = ts_562[dec->pulseoff[quart] * 4 + t];
+        tmp[6 - i] = ts_pulse_scales[dec->pulseoff[quart] * 4 + t];
     }
 
     coef = dec->pulsepos[quart] >> 15;
-    ptr1 = (const int16_t*)ts_140 + 30;
+    ptr1 = (const int16_t*)ts_pulse_values + 30;
     ptr2 = tmp;
     for(i = 0, j = 3; (i < 30) && (j > 0); i++){
         t = *ptr1++;
@@ -245,7 +245,7 @@ static void truespeech_place_pulses(TSContext *dec, int16_t *out, int quart)
         }
     }
     coef = dec->pulsepos[quart] & 0x7FFF;
-    ptr1 = (const int16_t*)ts_140;
+    ptr1 = (const int16_t*)ts_pulse_values;
     for(i = 30, j = 4; (i < 60) && (j > 0); i++){
         t = *ptr1++;
         if(coef >= t)
@@ -291,7 +291,7 @@ static void truespeech_synth(TSContext *dec, int16_t *out, int quart)
     }
 
     for(i = 0; i < 8; i++)
-        t[i] = (ts_5E2[i] * ptr1[i]) >> 15;
+        t[i] = (ts_decay_35_64[i] * ptr1[i]) >> 15;
 
     ptr0 = dec->tmp2;
     for(i = 0; i < 60; i++){
@@ -305,7 +305,7 @@ static void truespeech_synth(TSContext *dec, int16_t *out, int quart)
     }
 
     for(i = 0; i < 8; i++)
-        t[i] = (ts_5F2[i] * ptr1[i]) >> 15;
+        t[i] = (ts_decay_3_4[i] * ptr1[i]) >> 15;
 
     ptr0 = dec->tmp3;
     for(i = 0; i < 60; i++){

libavcodec/truespeech_data.h

@@ -71,7 +71,7 @@ static const int16_t * const ts_codebook[8] = {
 };
 
 /* table used for decoding pulse positions */
-static const int16_t ts_140[120] = {
+static const int16_t ts_pulse_values[120] = {
     0x0E46, 0x0CCC, 0x0B6D, 0x0A28, 0x08FC, 0x07E8, 0x06EB, 0x0604,
     0x0532, 0x0474, 0x03C9, 0x0330, 0x02A8, 0x0230, 0x01C7, 0x016C,
     0x011E, 0x00DC, 0x00A5, 0x0078, 0x0054, 0x0038, 0x0023, 0x0014,
@@ -94,11 +94,11 @@ static const int16_t ts_140[120] = {
 };
 
 /* filter for correlated input filter */
-static const int16_t ts_230[8] =
+static const int16_t ts_decay_994_1000[8] =
     { 0x7F3B, 0x7E78, 0x7DB6, 0x7CF5, 0x7C35, 0x7B76, 0x7AB8, 0x79FC };
 
 /* two-point filters table */
-static const int16_t ts_240[25 * 2] = {
+static const int16_t ts_order2_coeffs[25 * 2] = {
     0xED2F, 0x5239,
     0x54F1, 0xE4A9,
     0x2620, 0xEE3E,
@@ -131,7 +131,7 @@ static const int16_t ts_240[25 * 2] = {
 };
 
 /* possible pulse values */
-static const int16_t ts_562[64] = {
+static const int16_t ts_pulse_scales[64] = {
     0x0002, 0x0006, 0xFFFE, 0xFFFA,
     0x0004, 0x000C, 0xFFFC, 0xFFF4,
     0x0006, 0x0012, 0xFFFA, 0xFFEE,
@@ -151,9 +151,9 @@ static const int16_t ts_562[64] = {
 };
 
 /* filters used in final output calculations */
-static const int16_t ts_5E2[8] =
+static const int16_t ts_decay_35_64[8] =
     { 0x4666, 0x26B8, 0x154C, 0x0BB6, 0x0671, 0x038B, 0x01F3, 0x0112 };
-static const int16_t ts_5F2[8] =
+static const int16_t ts_decay_3_4[8] =
     { 0x6000, 0x4800, 0x3600, 0x2880, 0x1E60, 0x16C8, 0x1116, 0x0CD1 };
 
 #endif /* AVCODEC_TRUESPEECH_DATA_H */