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gst/equalizer/gstiirequalizer.c: Don't clip float/double samples, correctly unset passthrough mode and use better rou...

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Original commit message from CVS:
* gst/equalizer/gstiirequalizer.c:
(gst_iir_equalizer_transform_ip):
Don't clip float/double samples, correctly unset passthrough mode
and use better rounding for integer samples.
This commit is contained in:
Sebastian Dröge 2008-05-31 08:37:00 +00:00
parent c17d49ee20
commit f6ef43bbd7
2 changed files with 67 additions and 10 deletions
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7
ChangeLog
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@ -1,3 +1,10 @@
2008-05-31 Sebastian Dröge <slomo@circular-chaos.org>
* gst/equalizer/gstiirequalizer.c:
(gst_iir_equalizer_transform_ip):
Don't clip float/double samples, correctly unset passthrough mode
and use better rounding for integer samples.
2008-05-30 Sebastian Dröge <slomo@circular-chaos.org>
* gst/equalizer/gstiirequalizer.c:

70
gst/equalizer/gstiirequalizer.c
View file

@ -543,7 +543,7 @@ gst_iir_equalizer_compute_frequencies (GstIirEqualizer * equ, guint new_count)
/* start of code that is type specific */
#define CREATE_OPTIMIZED_FUNCTIONS(TYPE,BIG_TYPE,MIN_VAL,MAX_VAL) \
#define CREATE_OPTIMIZED_FUNCTIONS_INT(TYPE,BIG_TYPE,MIN_VAL,MAX_VAL) \
typedef struct { \
BIG_TYPE x1, x2; /* history of input values for a filter */ \
BIG_TYPE y1, y2; /* history of output values for a filter */ \
@ -554,9 +554,9 @@ one_step_ ## TYPE (GstIirEqualizerBand *filter, \
SecondOrderHistory ## TYPE *history, BIG_TYPE input) \
{ \
/* calculate output */ \
BIG_TYPE output = filter->a0 * input + filter->a1 * history->x1 + \
filter->a2 * history->x2 + filter->b1 * history->y1 + \
filter->b2 * history->y2; \
BIG_TYPE output = floor (filter->a0 * input + \
filter->a1 * history->x1 + filter->a2 * history->x2 + \
filter->b1 * history->y1 + filter->b2 * history->y2 + 0.5); \
/* update history */ \
history->y2 = history->y1; \
history->y1 = output; \
@ -594,9 +594,59 @@ guint size, guint channels) \
} \
}
CREATE_OPTIMIZED_FUNCTIONS (gint16, gint32, -32768, 32767);
CREATE_OPTIMIZED_FUNCTIONS (gfloat, gfloat, -1.0, 1.0);
CREATE_OPTIMIZED_FUNCTIONS (gdouble, gdouble, -1.0, 1.0);
#define CREATE_OPTIMIZED_FUNCTIONS(TYPE) \
typedef struct { \
TYPE x1, x2; /* history of input values for a filter */ \
TYPE y1, y2; /* history of output values for a filter */ \
} SecondOrderHistory ## TYPE; \
\
static inline TYPE \
one_step_ ## TYPE (GstIirEqualizerBand *filter, \
SecondOrderHistory ## TYPE *history, TYPE input) \
{ \
/* calculate output */ \
TYPE output = filter->a0 * input + filter->a1 * history->x1 + \
filter->a2 * history->x2 + filter->b1 * history->y1 + \
filter->b2 * history->y2; \
/* update history */ \
history->y2 = history->y1; \
history->y1 = output; \
history->x2 = history->x1; \
history->x1 = input; \
\
return output; \
} \
\
static const guint \
history_size_ ## TYPE = sizeof (SecondOrderHistory ## TYPE); \
\
static void \
gst_iir_equ_process_ ## TYPE (GstIirEqualizer *equ, guint8 *data, \
guint size, guint channels) \
{ \
guint frames = size / channels / sizeof (TYPE); \
guint i, c, f; \
TYPE cur; \
\
for (i = 0; i < frames; i++) { \
for (c = 0; c < channels; c++) { \
SecondOrderHistory ## TYPE *history = equ->history; \
cur = *((TYPE *) data); \
for (f = 0; f < equ->freq_band_count; f++) { \
GstIirEqualizerBand *filter = equ->bands[f]; \
\
cur = one_step_ ## TYPE (filter, history, cur); \
history++; \
} \
*((TYPE *) data) = (TYPE) cur; \
data += sizeof (TYPE); \
} \
} \
}
CREATE_OPTIMIZED_FUNCTIONS_INT (gint16, gint32, -32768, 32767);
CREATE_OPTIMIZED_FUNCTIONS (gfloat);
CREATE_OPTIMIZED_FUNCTIONS (gdouble);
static GstFlowReturn
gst_iir_equalizer_transform_ip (GstBaseTransform * btrans, GstBuffer * buf)
@ -607,9 +657,6 @@ gst_iir_equalizer_transform_ip (GstBaseTransform * btrans, GstBuffer * buf)
GstClockTime timestamp;
if (gst_base_transform_is_passthrough (btrans))
return GST_FLOW_OK;
if (G_UNLIKELY (filter->format.channels < 1 || equ->process == NULL))
return GST_FLOW_NOT_NEGOTIATED;
@ -618,6 +665,9 @@ gst_iir_equalizer_transform_ip (GstBaseTransform * btrans, GstBuffer * buf)
set_passthrough (equ);
}
if (gst_base_transform_is_passthrough (btrans))
return GST_FLOW_OK;
timestamp = GST_BUFFER_TIMESTAMP (buf);
timestamp =
gst_segment_to_stream_time (&btrans->segment, GST_FORMAT_TIME, timestamp);