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105 lines
3 KiB
C
105 lines
3 KiB
C
/* GStreamer
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* Copyright (C) <2014> Wim Taymans <wim.taymans@gmail.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#ifndef __GST_RESAMPLER_H__
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#define __GST_RESAMPLER_H__
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#include <gst/gst.h>
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G_BEGIN_DECLS
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typedef struct _GstResampler GstResampler;
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/**
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* GstResamplerMethod:
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* @GST_RESAMPLER_METHOD_NEAREST: Duplicates the samples when
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* upsampling and drops when downsampling
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* @GST_RESAMPLER_METHOD_LINEAR: Uses linear interpolation to reconstruct
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* missing samples and averaging to downsample
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* @GST_RESAMPLER_METHOD_BICUBIC: Uses bicubic interpolation
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* @GST_RESAMPLER_METHOD_SINC: Uses sinc interpolation
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* @GST_RESAMPLER_METHOD_LANCZOS: Uses lanczos interpolation
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*
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* Different subsampling and upsampling methods
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*
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* Since: 1.6
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*/
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typedef enum {
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GST_RESAMPLER_METHOD_NEAREST,
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GST_RESAMPLER_METHOD_LINEAR,
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GST_RESAMPLER_METHOD_BICUBIC,
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GST_RESAMPLER_METHOD_SINC,
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GST_RESAMPLER_METHOD_LANCZOS,
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} GstResamplerMethod;
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/**
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* GstResamplerFlags:
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* @GST_RESAMPLER_FLAG_NONE: no flags
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*
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* Different resampler flags.
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*
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* Since: 1.6
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*/
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typedef enum {
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GST_RESAMPLER_FLAG_NONE = (0),
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} GstResamplerFlags;
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/**
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* GstResampler:
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* @in_size: the input size
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* @out_size: the output size
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* @max_taps: the maximum number of taps
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* @n_phases: the number of phases
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* @offset: array with the source offset for each output element
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* @phase: array with the phase to use for each output element
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* @n_taps: array with new number of taps for each phase
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* @taps: the taps for all phases
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*
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* A structure holding resampler information.
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*
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* Since: 1.6
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*/
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struct _GstResampler
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{
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gint in_size;
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gint out_size;
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guint max_taps;
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guint n_phases;
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guint *offset;
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guint *phase;
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guint *n_taps;
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gdouble *taps;
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gpointer _gst_reserved[GST_PADDING];
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};
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gboolean gst_resampler_init (GstResampler *resampler,
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GstResamplerMethod method,
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GstResamplerFlags flags,
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guint n_phases, guint n_taps,
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gdouble shift,
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guint in_size, guint out_size,
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GstStructure *options);
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void gst_resampler_clear (GstResampler *resampler);
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G_END_DECLS
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#endif /* __GST_RESAMPLER_H__ */
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