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Revert the latest change: floating point samples are allowed to have any value, not only values in the range [-1,1]. ...

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Original commit message from CVS:
* gst/volume/gstvolume.c: (volume_choose_func):
* tests/check/elements/volume.c: (GST_START_TEST):
Revert the latest change: floating point samples are allowed to
have any value, not only values in the range [-1,1]. Thanks to Andy
Wingo for noticing.
Also fix processing of int32 samples with volumes > 4 by making the
unity value smaller which prevents overflows.
This commit is contained in:
Sebastian Dröge 2007-09-09 04:08:48 +00:00
parent 03992b8779
commit 6fa7788c5d
3 changed files with 16 additions and 49 deletions
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10
ChangeLog
View file

@ -1,3 +1,13 @@
2007-09-09 Sebastian Dröge <slomo@circular-chaos.org>
* gst/volume/gstvolume.c: (volume_choose_func):
* tests/check/elements/volume.c: (GST_START_TEST):
Revert the latest change: floating point samples are allowed to
have any value, not only values in the range [-1,1]. Thanks to Andy
Wingo for noticing.
Also fix processing of int32 samples with volumes > 4 by making the
unity value smaller which prevents overflows.
2007-09-07 Tim-Philipp Müller <tim at centricular dot net>
* gst-libs/gst/rtp/gstrtpbuffer.c:

51
gst/volume/gstvolume.c
View file

@ -64,8 +64,8 @@
#define VOLUME_UNITY_INT16_BIT_SHIFT 13 /* number of bits to shift for unity */
#define VOLUME_UNITY_INT24 2097152 /* internal int for unity 2^(24-3) */
#define VOLUME_UNITY_INT24_BIT_SHIFT 21 /* number of bits to shift for unity */
#define VOLUME_UNITY_INT32 536870912 /* internal int for unity 2^(32-3) */
#define VOLUME_UNITY_INT32_BIT_SHIFT 29
#define VOLUME_UNITY_INT32 134217728 /* internal int for unity 2^(32-5) */
#define VOLUME_UNITY_INT32_BIT_SHIFT 27
#define VOLUME_MAX_DOUBLE 10.0
#define VOLUME_MAX_INT8 G_MAXINT8
#define VOLUME_MIN_INT8 G_MININT8
@ -214,12 +214,8 @@ static gboolean volume_set_caps (GstBaseTransform * base, GstCaps * incaps,
static void volume_process_double (GstVolume * this, gpointer bytes,
guint n_bytes);
static void volume_process_double_clamp (GstVolume * this, gpointer bytes,
guint n_bytes);
static void volume_process_float (GstVolume * this, gpointer bytes,
guint n_bytes);
static void volume_process_float_clamp (GstVolume * this, gpointer bytes,
guint n_bytes);
static void volume_process_int32 (GstVolume * this, gpointer bytes,
guint n_bytes);
static void volume_process_int32_clamp (GstVolume * this, gpointer bytes,
@ -288,22 +284,10 @@ volume_choose_func (GstVolume * this)
case GST_VOLUME_FORMAT_FLOAT:
switch (this->width) {
case 32:
/* only clamp if the gain is greater than 1.0
* FIXME: real_vol_f can change while processing the buffer!
*/
if (this->real_vol_f > 1.0)
this->process = volume_process_float_clamp;
else
this->process = volume_process_float;
this->process = volume_process_float;
break;
case 64:
/* only clamp if the gain is greater than 1.0
* FIXME: real_vol_f can change while processing the buffer!
*/
if (this->real_vol_f > 1.0)
this->process = volume_process_double_clamp;
else
this->process = volume_process_double;
this->process = volume_process_double;
break;
}
break;
@ -511,20 +495,6 @@ volume_process_double (GstVolume * this, gpointer bytes, guint n_bytes)
}
}
static void
volume_process_double_clamp (GstVolume * this, gpointer bytes, guint n_bytes)
{
gdouble *data = (gdouble *) bytes;
guint i, num_samples = n_bytes / sizeof (gdouble);
gdouble tmp;
for (i = 0; i < num_samples; i++) {
tmp = *data * this->real_vol_f;
*data++ = CLAMP (tmp, -1.0, 1.0);
}
}
static void
volume_process_float (GstVolume * this, gpointer bytes, guint n_bytes)
{
@ -543,19 +513,6 @@ volume_process_float (GstVolume * this, gpointer bytes, guint n_bytes)
oil_scalarmultiply_f32_ns (data, data, &this->real_vol_f, num_samples);
}
static void
volume_process_float_clamp (GstVolume * this, gpointer bytes, guint n_bytes)
{
gfloat *data = (gfloat *) bytes;
guint i, num_samples = n_bytes / sizeof (gfloat);
gfloat tmp;
for (i = 0; i < num_samples; i++) {
tmp = *data * this->real_vol_f;
*data++ = CLAMP (tmp, -1.0, 1.0);
}
}
static void
volume_process_int32 (GstVolume * this, gpointer bytes, guint n_bytes)
{

4
tests/check/elements/volume.c
View file

@ -1006,7 +1006,7 @@ GST_START_TEST (test_double_f32)
GstBuffer *outbuffer;
GstCaps *caps;
gfloat in[2] = { 0.75, -0.25 };
gfloat out[2] = { 1.0, -0.5 }; /* notice the clamped sample */
gfloat out[2] = { 1.5, -0.5 }; /* nothing is clamped */
gfloat *res;
volume = setup_volume ();
@ -1190,7 +1190,7 @@ GST_START_TEST (test_double_f64)
GstBuffer *outbuffer;
GstCaps *caps;
gdouble in[2] = { 0.75, -0.25 };
gdouble out[2] = { 1.0, -0.5 }; /* notice the clamped sample */
gdouble out[2] = { 1.5, -0.5 }; /* nothing is clamped */
gdouble *res;
volume = setup_volume ();