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audio-dsp: cleanups to format conversion

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This commit is contained in:
Wim Taymans 2018-06-26 16:55:19 +02:00
parent b46a0bc047
commit d9e3eb49cc
1 changed files with 31 additions and 15 deletions
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46
src/modules/module-media-session/audio-dsp.c
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@ -213,6 +213,17 @@ static int clear_buffers(struct node *n, struct port *p)
return 0; return 0;
} }
#define S16_MIN -32767
#define S16_MAX 32767
#define S16_SCALE 32767
#define F32_TO_S16(v) \
({ \
typeof(v) _v = (v); \
_v < -1.0f ? S16_MIN : \
_v >= 1.0f ? S16_MAX : \
_v * S16_SCALE; \
})
static void conv_f32_s16(void *dst, void *src, int index, int n_samples, int stride) static void conv_f32_s16(void *dst, void *src, int index, int n_samples, int stride)
{ {
@ -221,17 +232,13 @@ static void conv_f32_s16(void *dst, void *src, int index, int n_samples, int str
int i; int i;
d += index; d += index;
for (i = 0; i < n_samples; i++) { for (i = 0; i < n_samples; i++) {
if (s[i] < -1.0f) *d = F32_TO_S16(s[i]);
*d = -((1 << 15) - 1);
else if (s[i] >= 1.0f)
*d = (1U << 15) - 1;
else
//*out = lrintf(in[i] * 32767.0f);
*d = s[i] * (1.0f * ((1U << 15) - 1));
d += stride; d += stride;
} }
} }
#define S16_TO_F32(v) ((v) * (1.0f / S16_SCALE))
static void conv_s16_f32(void *dst, void *src, int index, int n_samples, int stride) static void conv_s16_f32(void *dst, void *src, int index, int n_samples, int stride)
{ {
float *d = dst; float *d = dst;
@ -240,7 +247,7 @@ static void conv_s16_f32(void *dst, void *src, int index, int n_samples, int str
s += index; s += index;
for (i = 0; i < n_samples; i++) { for (i = 0; i < n_samples; i++) {
d[i] = *s * (1.0f / ((1U << 15) - 1)); d[i] = S16_TO_F32(*s);
s += stride; s += stride;
} }
} }
@ -256,6 +263,18 @@ static void fill_s16(void *dst, int index, int n_samples, int stride)
} }
} }
#define S32_MIN -2147483647
#define S32_MAX 2147483647
#define S32_SCALE 2147483647
#define F32_TO_S32(v) \
({ \
typeof(v) _v = (v); \
_v < -1.0f ? S32_MIN : \
_v >= 1.0f ? S32_MAX : \
_v * S32_SCALE; \
})
static void conv_f32_s32(void *dst, void *src, int index, int n_samples, int stride) static void conv_f32_s32(void *dst, void *src, int index, int n_samples, int stride)
{ {
int32_t *d = dst; int32_t *d = dst;
@ -263,16 +282,13 @@ static void conv_f32_s32(void *dst, void *src, int index, int n_samples, int str
int i; int i;
d += index; d += index;
for (i = 0; i < n_samples; i++) { for (i = 0; i < n_samples; i++) {
if (s[i] < -1.0f) *d = F32_TO_S32(s[i]);
*d = -((1U << 31) - 1);
else if (s[i] >= 1.0f)
*d = (1U << 31) - 1;
else
*d = s[i] * (1.0f * ((1U << 31) - 1));
d += stride; d += stride;
} }
} }
#define S32_TO_F32(v) ((v) * (1.0f / S32_SCALE))
static void conv_s32_f32(void *dst, void *src, int index, int n_samples, int stride) static void conv_s32_f32(void *dst, void *src, int index, int n_samples, int stride)
{ {
float *d = dst; float *d = dst;
@ -281,7 +297,7 @@ static void conv_s32_f32(void *dst, void *src, int index, int n_samples, int str
s += index; s += index;
for (i = 0; i < n_samples; i++) { for (i = 0; i < n_samples; i++) {
d[i] = *s * (1.0f / ((1U << 31) - 1)); d[i] = S32_TO_F32(*s);
s += stride; s += stride;
} }
} }