Changeset 3633:33a6a1a59939 in roaraudio for libroardsp

Timestamp:

03/11/10 23:21:59 (14 years ago)

Author:

phi

Branch:

default

Phase:

public

Message:

code for multi channel RMS (currently only 1 and 2 channels)

File:

• libroardsp/rms.c (modified) (2 diffs)

libroardsp/rms.c

@@ -2 +2 @@
 
 /*
- *      Copyright (C) Philipp 'ph3-der-loewe' Schafft - 2009
+ *      Copyright (C) Philipp 'ph3-der-loewe' Schafft - 2009-2010
  *
  *  This file is part of libroardsp a part of RoarAudio,
@@ -63 +63 @@
 
 
+int roar_rms2_1_8_2    (int8_t  * data, size_t samples, int64_t * rms) {
+ register int64_t a0 = 0, a1 = 0;
+ register size_t  i;
+
+ if ( samples == 0 )
+  return 0;
+
+ if ( data == NULL )
+  return -1;
+
+ if ( samples & 0x1 ) /* odd */
+  return -1;
+
+ for (i = 0; i < samples; i += 2) {
+  a0 += data[i+0] * data[i+0];
+  a1 += data[i+1] * data[i+1];
+ }
+
+ samples /= 2;
+
+ a0 /= samples;
+ a1 /= samples;
+
+ rms[0] = a0;
+ rms[1] = a1;
+
+ return 0;
+}
+
+int roar_rms2_1_16_2   (int16_t * data, size_t samples, int64_t * rms) {
+ register int64_t a0 = 0, a1 = 0;
+ register size_t  i;
+
+ if ( samples == 0 )
+  return 0;
+
+ if ( data == NULL )
+  return -1;
+
+ if ( samples & 0x1 ) /* odd */
+  return -1;
+
+ for (i = 0; i < samples; i += 2) {
+  a0 += data[i+0] * data[i+0];
+  a1 += data[i+1] * data[i+1];
+ }
+
+ samples /= 2;
+
+ a0 /= samples;
+ a1 /= samples;
+
+ rms[0] = a0;
+ rms[1] = a1;
+
+ return 0;
+}
+
+int roar_rms2_1_32_2   (int32_t * data, size_t samples, int64_t * rms) {
+ register int64_t a0 = 0, a1 = 0;
+ register size_t  i;
+
+ if ( samples == 0 )
+  return 0;
+
+ if ( data == NULL )
+  return -1;
+
+ if ( samples & 0x1 ) /* odd */
+  return -1;
+
+ for (i = 0; i < samples; i += 2) {
+  a0 += data[i+0] * data[i+0];
+  a1 += data[i+1] * data[i+1];
+ }
+
+ samples /= 2;
+
+ a0 /= samples;
+ a1 /= samples;
+
+ rms[0] = a0;
+ rms[1] = a1;
+
+ return 0;
+}
+
+
+int roar_rms2_1_8_n    (int8_t  * data, size_t samples, int64_t * rms, size_t n) {
+ if ( n == 0 )
+  return 0;
+
+ if ( rms == NULL )
+  return -1;
+
+ switch (n) {
+  case 1: return *rms = roar_rms2_1_8(data, samples); return *rms == -1 ? -1 : 0; break;
+  default:
+   return -1;
+ }
+}
+
+int roar_rms2_1_16_n   (int16_t * data, size_t samples, int64_t * rms, size_t n) {
+ if ( n == 0 )
+  return 0;
+
+ if ( rms == NULL )
+  return -1;
+
+ switch (n) {
+  case 1: return *rms = roar_rms2_1_16(data, samples); return *rms == -1 ? -1 : 0; break;
+  default:
+   return -1;
+ }
+}
+
+int roar_rms2_1_32_n   (int32_t * data, size_t samples, int64_t * rms, size_t n) {
+ if ( n == 0 )
+  return 0;
+
+ if ( rms == NULL )
+  return -1;
+
+ switch (n) {
+  case 1: return *rms = roar_rms2_1_32(data, samples); return *rms == -1 ? -1 : 0; break;
+  default:
+   return -1;
+ }
+}
+
 //ll