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bw_sampler param renaming + get phase

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This commit is contained in:
Stefano D'Angelo 2025-04-10 10:26:08 +02:00
parent e319de1a1f
commit 2ceca5cc0c
1 changed files with 63 additions and 16 deletions
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79
include/bw_sampler.h
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@ -64,6 +64,19 @@ typedef struct bw_sampler_state bw_sampler_state;
/*! <<<```
* Internal state and related.
*
* #### bw_sampler_phase
* ```>>> */
typedef enum {
bw_sampler_phase_before,
bw_sampler_phase_playing,
bw_sampler_phase_done
} bw_sampler_phase;
/*! <<<```
* Sampler playback phase:
* * `bw_sampler_phase_before`: playback has not yet started;
* * `bw_sampler_phase_playing`: playback ongoing;
* * `bw_sampler_phase_done`: playback finished.
*
* #### bw_sampler_init()
* ```>>> */
static inline void bw_sampler_init(
@ -159,9 +172,9 @@ static inline void bw_sampler_process_multi(
/*! <<<```
* ...
*
* #### bw_sampler_set_playback_rate()
* #### bw_sampler_set_rate()
* ```>>> */
static inline void bw_sampler_set_playback_rate(
static inline void bw_sampler_set_rate(
bw_sampler_coeffs * BW_RESTRICT coeffs,
float value);
/*! <<<```
@ -171,6 +184,13 @@ static inline void bw_sampler_set_playback_rate(
*
* Default value: `1.f`.
*
* #### bw_sampler_get_phase()
* ```>>> */
static inline bw_sampler_phase bw_sampler_get_phase(
const bw_sampler_state * BW_RESTRICT state);
/*! <<<```
* ...
*
* #### bw_sampler_coeffs_is_valid()
* ```>>> */
static inline char bw_sampler_coeffs_is_valid(
@ -238,24 +258,25 @@ struct bw_sampler_coeffs {
#endif
// Parameters
float playback_rate;
float rate;
};
struct bw_sampler_state {
#ifdef BW_DEBUG_DEEP
uint32_t hash;
uint32_t coeffs_reset_id;
uint32_t hash;
uint32_t coeffs_reset_id;
#endif
// States
float pos;
float pos;
bw_sampler_phase phase;
};
static inline void bw_sampler_init(
bw_sampler_coeffs * BW_RESTRICT coeffs) {
BW_ASSERT(coeffs != BW_NULL);
coeffs->playback_rate = 1.f;
coeffs->rate = 1.f;
#ifdef BW_DEBUG_DEEP
coeffs->hash = bw_hash_sdbm("bw_sampler_coeffs");
@ -384,6 +405,7 @@ static inline float bw_sampler_reset_state(
(void)coeffs;
state->pos = pos_0;
state->phase = bw_sampler_phase_before;
const float y = bw_sampler_interpolate(sample, sample_length, pos_0);
#ifdef BW_DEBUG_DEEP
@ -474,9 +496,12 @@ static inline float bw_sampler_process1(
float y;
if (state->pos >= sample_length + 2) {
y = bw_sampler_interpolate(sample, sample_length, state->pos);
state->pos += coeffs->playback_rate;
} else
state->pos += coeffs->rate;
state->phase = bw_sampler_phase_playing;
} else {
y = 0.f;
state->phase = bw_sampler_phase_done;
}
BW_ASSERT_DEEP(bw_sampler_coeffs_is_valid(coeffs));
BW_ASSERT_DEEP(coeffs->state >= bw_sampler_coeffs_state_reset_coeffs);
@ -566,7 +591,7 @@ static inline void bw_sampler_process_multi(
#endif
}
static inline void bw_sampler_set_playback_rate(
static inline void bw_sampler_set_rate(
bw_sampler_coeffs * BW_RESTRICT coeffs,
float value) {
BW_ASSERT(coeffs != BW_NULL);
@ -575,12 +600,20 @@ static inline void bw_sampler_set_playback_rate(
BW_ASSERT(bw_is_finite(value));
BW_ASSERT(value >= 0.f);
coeffs->playback_rate = value;
coeffs->rate = value;
BW_ASSERT_DEEP(bw_sampler_coeffs_is_valid(coeffs));
BW_ASSERT_DEEP(coeffs->state >= bw_sampler_coeffs_state_init);
}
static inline bw_sampler_phase bw_sampler_get_phase(
const bw_sampler_state * BW_RESTRICT state) {
BW_ASSERT(state != BW_NULL);
BW_ASSERT_DEEP(bw_sampler_state_is_valid(BW_NULL, state));
return state->phase;
}
static inline char bw_sampler_coeffs_is_valid(
const bw_sampler_coeffs * BW_RESTRICT coeffs) {
BW_ASSERT(coeffs != BW_NULL);
@ -592,7 +625,7 @@ static inline char bw_sampler_coeffs_is_valid(
return 0;
#endif
if (!bw_is_finite(coeffs->playback_rate) || coeffs->playback_rate < 0.f)
if (!bw_is_finite(coeffs->rate) || coeffs->rate < 0.f)
return 0;
return 1;
@ -613,7 +646,12 @@ static inline char bw_sampler_state_is_valid(
(void)coeffs;
return bw_is_finite(state->pos) && pos >= 0.f;
if (!bw_is_finite(state->pos) || state->pos < 0.f)
return 0;
if (state->phase < bw_sampler_phase_before || state->phase > bw_sampler_phase_done)
return 0;
return 1;
}
#if !defined(BW_CXX_NO_EXTERN_C) && defined(__cplusplus)
@ -683,8 +721,11 @@ public:
size_t nSamples);
# endif
void setPlaybackRate(
void setRate(
float value);
bw_sampler_phase getPhase(
size_t channel);
/*! <<<...
* }
* ```
@ -782,9 +823,15 @@ inline void Sampler<N_CHANNELS>::process(
# endif
template<size_t N_CHANNELS>
inline void Sampler<N_CHANNELS>::setPlaybackRate(
inline void Sampler<N_CHANNELS>::setRate(
float value) {
bw_sampler_set_playback_rate(&coeffs, value);
bw_sampler_set_rate(&coeffs, value);
}
template<size_t N_CHANNELS>
inline bw_sampler_phase Sampler<N_CHANNELS>::getPhase(
size_t channel) {
return bw_sampler_get_phase(states + channel);
}
}