diff options
Diffstat (limited to 'src/libcompandor/compandor.c')
| -rw-r--r-- | src/libcompandor/compandor.c | 22 |
1 files changed, 17 insertions, 5 deletions
diff --git a/src/libcompandor/compandor.c b/src/libcompandor/compandor.c index b06602e..1b0797c 100644 --- a/src/libcompandor/compandor.c +++ b/src/libcompandor/compandor.c @@ -19,6 +19,7 @@ #include <stdio.h> #include <stdint.h> +#include <stdlib.h> #include <string.h> #include <math.h> #include "../libsample/sample.h" @@ -39,6 +40,7 @@ #define ENVELOPE_MAX 9.990 static double sqrt_tab[10000]; +static int compandor_initalized = 0; /* * Init compandor according to ITU-T G.162 specification @@ -46,10 +48,24 @@ static double sqrt_tab[10000]; * Hopefully this is correct * */ -void init_compandor(compandor_t *state, double samplerate, double attack_ms, double recovery_ms) + +void compandor_init(void) { int i; + // FIXME: make global, not at instance + for (i = 0; i < 10000; i++) + sqrt_tab[i] = sqrt(i * 0.001); + compandor_initalized = 1; +} + +void setup_compandor(compandor_t *state, double samplerate, double attack_ms, double recovery_ms) +{ + if (!compandor_initalized) { + fprintf(stderr, "Compandor nicht initialized.\n"); + abort(); + } + memset(state, 0, sizeof(*state)); state->c.peak = 1.0; @@ -60,10 +76,6 @@ void init_compandor(compandor_t *state, double samplerate, double attack_ms, dou state->c.step_down = pow(COMPRESS_RECOVERY_FACTOR, 1000.0 / recovery_ms / samplerate); state->e.step_up = pow(EXPAND_ATTACK_FACTOR, 1000.0 / attack_ms / samplerate); state->e.step_down = pow(EXPAND_RECOVERY_FACTOR, 1000.0 / recovery_ms / samplerate); - - // FIXME: make global, not at instance - for (i = 0; i < 10000; i++) - sqrt_tab[i] = sqrt(i * 0.001); } void compress_audio(compandor_t *state, sample_t *samples, int num) |