Changeset 2438:42679f780d53 in roaraudio

Timestamp:

08/19/09 20:54:21 (15 years ago)

Author:

phi

Branch:

default

Phase:

public

Message:

some basic code

File:

• libroardsp/fader.c (modified) (1 diff)

libroardsp/fader.c

@@ -25 +25 @@
 #include "libroardsp.h"
 
+#define _CHECK_BASIC()   if ( state == NULL ) return -1
+#define _CHECK_CALCPCM() _CHECK_BASIC(); if ( frames == 0 ) return 0; if ( data == NULL ) return -1;
+
+int roar_fader_init         (struct roar_fader_state * state, float * poly, int coeff) {
+ _CHECK_BASIC();
+
+ if ( poly == NULL )
+  return -1;
+
+ if ( coeff < 2 )
+  return -1;
+
+ if ( coeff > ROAR_FADER_MAX_COEFF )
+  return -1;
+
+ memset(state, 0, sizeof(struct roar_fader_state));
+
+ state->rate  = -1;
+ state->coeff = coeff;
+
+ memcpy(&(state->poly), poly, sizeof(float)*coeff);
+
+ return 0;
+}
+
+int roar_fader_set_rate     (struct roar_fader_state * state, int rate) {
+ _CHECK_BASIC();
+
+ state->rate = rate;
+
+ return 0;
+}
+
+int roar_fader_set_startstop(struct roar_fader_state * state, ssize_t start, ssize_t stop) {
+ _CHECK_BASIC();
+
+ if ( start >= 0 )
+  state->start = start;
+
+ if ( stop  >= 0 )
+  state->stop  = stop;
+
+ return 0;
+}
+
+int roar_fader_calcpcm_i16n(struct roar_fader_state * state, int16_t * data, size_t frames, int channels) {
+ _CHECK_CALCPCM();
+
+ switch (channels) {
+  case 1: return roar_fader_calcpcm_i161(state, data, frames);
+ }
+
+ return -1;
+}
+
+int roar_fader_calcpcm_i161(struct roar_fader_state * state, int16_t * data, size_t frames) {
+ return -1;
+}
 
 //ll