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| struct | GstVideoResampler | 
| enum | GstVideoResamplerFlags | 
| enum | GstVideoResamplerMethod | 
| #define | GST_VIDEO_RESAMPLER_OPT_CUBIC_B | 
| #define | GST_VIDEO_RESAMPLER_OPT_CUBIC_C | 
| #define | GST_VIDEO_RESAMPLER_OPT_ENVELOPE | 
| #define | GST_VIDEO_RESAMPLER_OPT_MAX_TAPS | 
| #define | GST_VIDEO_RESAMPLER_OPT_SHARPEN | 
| #define | GST_VIDEO_RESAMPLER_OPT_SHARPNESS | 
GstVideoResampler is a structure which holds the information required to perform various kinds of resampling filtering.
void
gst_video_resampler_clear (GstVideoResampler *resampler);
Clear a previously initialized GstVideoResampler resampler
.
Since: 1.6
gboolean gst_video_resampler_init (GstVideoResampler *resampler,GstVideoResamplerMethod method,GstVideoResamplerFlags flags,guint n_phases,guint n_taps,gdouble shift,guint in_size,guint out_size,GstStructure *options);
struct GstVideoResampler {
  gint in_size;
  gint out_size;
  guint max_taps;
  guint n_phases;
  guint32 *offset;
  guint32 *phase;
  guint32 *n_taps;
  gdouble *taps;
};
A structure holding resampler information.
| gint  | the input size | |
| gint  | the output size | |
| guint  | the maximum number of taps | |
| guint  | the number of phases | |
| guint32 * | array with the source offset for each output element | |
| guint32 * | array with the phase to use for each output element | |
| guint32 * | array with new number of taps for each phase | |
| gdouble * | the taps for all phases | 
Since: 1.6
Different subsampling and upsampling methods
| Duplicates the samples when upsampling and drops when downsampling | ||
| Uses linear interpolation to reconstruct missing samples and averaging to downsample | ||
| Uses cubic interpolation | ||
| Uses sinc interpolation | ||
| Uses lanczos interpolation | 
Since: 1.6
#define GST_VIDEO_RESAMPLER_OPT_CUBIC_B "GstVideoResampler.cubic-b"
G_TYPE_DOUBLE, B parameter of the cubic filter. The B parameter controls the bluriness. Values between 0.0 and 2.0 are accepted. 1/3 is the default.
Below are some values of popular filters: B C Hermite 0.0 0.0 Spline 1.0 0.0 Catmull-Rom 0.0 1/2 Mitchell 1/3 1/3 Robidoux 0.3782 0.3109 Robidoux Sharp 0.2620 0.3690 Robidoux Soft 0.6796 0.1602
#define GST_VIDEO_RESAMPLER_OPT_CUBIC_C "GstVideoResampler.cubic-c"
G_TYPE_DOUBLE, C parameter of the cubic filter. The C parameter controls the Keys alpha value. Values between 0.0 and 2.0 are accepted. 1/3 is the default.
See GST_VIDEO_RESAMPLER_OPT_CUBIC_B for some more common values
#define GST_VIDEO_RESAMPLER_OPT_ENVELOPE "GstVideoResampler.envelope"
G_TYPE_DOUBLE, specifies the size of filter envelope for
GST_VIDEO_RESAMPLER_METHOD_LANCZOS
. values are clamped between
1.0 and 5.0. 2.0 is the default.
#define GST_VIDEO_RESAMPLER_OPT_MAX_TAPS "GstVideoResampler.max-taps"
G_TYPE_INT, limits the maximum number of taps to use. 16 is the default.
#define GST_VIDEO_RESAMPLER_OPT_SHARPEN "GstVideoResampler.sharpen"
G_TYPE_DOUBLE, specifies sharpening of the filter for
GST_VIDEO_RESAMPLER_METHOD_LANCZOS
. values are clamped between
0.0 and 1.0. 0.0 is the default.