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resampler: add some options

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This commit is contained in:
Wim Taymans 2014-10-24 16:23:53 +02:00
parent b4a5001e3c
commit ad0e0006b2
2 changed files with 39 additions and 3 deletions
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15
gst-libs/gst/video/resampler.c
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@ -290,9 +290,18 @@ gst_resampler_init (GstResampler * resampler,
{
gdouble resample_inc = in_size / (gdouble) out_size;
params.envelope = 2.0;
params.sharpness = 1.0;
params.sharpen = 0.0;
if (!options
|| !gst_structure_get_double (options, GST_RESAMPLER_OPT_ENVELOPE,
&params.envelope))
params.envelope = 2.0;
if (!options
|| !gst_structure_get_double (options, GST_RESAMPLER_OPT_SHARPNESS,
&params.sharpness))
params.sharpness = 1.0;
if (!options
|| !gst_structure_get_double (options, GST_RESAMPLER_OPT_SHARPEN,
&params.sharpen))
params.sharpen = 0.0;
if (resample_inc > 1.0) {
params.fx = (1.0 / resample_inc) * params.sharpness;

27
gst-libs/gst/video/resampler.h
View file

@ -48,6 +48,33 @@ typedef enum {
GST_RESAMPLER_METHOD_LANCZOS,
} GstResamplerMethod;
/**
* GST_RESAMPLER_OPT_ENVELOPE:
*
* G_TYPE_DOUBLE, specifies the size of filter envelope for
* @GST_RESAMPLER_METHOD_LANCZOS. values are clamped between
* 1.0 and 5.0. 2.0 is the default.
*/
#define GST_RESAMPLER_OPT_ENVELOPE "GstResampler.envelope"
/**
* GST_RESAMPLER_OPT_SHARPNESS:
*
* G_TYPE_DOUBLE, specifies sharpness of the filter for
* @GST_RESAMPLER_METHOD_LANCZOS. values are clamped between
* 0.5 and 1.5. 1.0 is the default.
*/
#define GST_RESAMPLER_OPT_SHARPNESS "GstResampler.sharpness"
/**
* GST_RESAMPLER_OPT_SHARPEN:
*
* G_TYPE_DOUBLE, specifies sharpening of the filter for
* @GST_RESAMPLER_METHOD_LANCZOS. values are clamped between
* 0.0 and 1.0. 0.0 is the default.
*/
#define GST_RESAMPLER_OPT_SHARPEN "GstResampler.sharpen"
/**
* GstResamplerFlags:
* @GST_RESAMPLER_FLAG_NONE: no flags