gstreamer/gst/audioresample/gstaudioresample.h
Carlos Rafael Giani c41faa3d8e audioresample: sinc filter performance improvements
Original idea comes from Jyri Sarha
( http://lists.xiph.org/pipermail/speex-dev/2011-September/008243.html ).
Patch was discovered by Branislav Katreniak
( branislav.katreniak@streamunlimited.com ) for StreamUnlimited
( http://streamunlimited.com/ ). Tests showed up to 5x speed increase in
the resampler in the 44.1<->48kHz case.
I added the sinc-filter-mode and sinc-filter-auto-threshold properties
and the auto mode threshold tests, and adapted the code to GStreamer 1.0.

Signed-off-by: Carlos Rafael Giani <dv@pseudoterminal.org>
2012-10-25 14:03:52 +02:00

101 lines
2.6 KiB
C

/* GStreamer
* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
* Copyright (C) <2007-2008> Sebastian Dröge <sebastian.droege@collabora.co.uk>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef __AUDIO_RESAMPLE_H__
#define __AUDIO_RESAMPLE_H__
#include <gst/gst.h>
#include <gst/base/gstbasetransform.h>
#include <gst/audio/audio.h>
#include "speex_resampler_wrapper.h"
G_BEGIN_DECLS
#define GST_TYPE_AUDIO_RESAMPLE \
(gst_audio_resample_get_type())
#define GST_AUDIO_RESAMPLE(obj) \
(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_AUDIO_RESAMPLE,GstAudioResample))
#define GST_AUDIO_RESAMPLE_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_AUDIO_RESAMPLE,GstAudioResampleClass))
#define GST_IS_AUDIO_RESAMPLE(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_AUDIO_RESAMPLE))
#define GST_IS_AUDIO_RESAMPLE_CLASS(klass) \
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_AUDIO_RESAMPLE))
typedef struct _GstAudioResample GstAudioResample;
typedef struct _GstAudioResampleClass GstAudioResampleClass;
/**
* GstAudioResample:
*
* Opaque data structure.
*/
struct _GstAudioResample {
GstBaseTransform element;
/* <private> */
gboolean need_discont;
GstClockTime t0;
guint64 in_offset0;
guint64 out_offset0;
guint64 samples_in;
guint64 samples_out;
guint64 num_gap_samples;
guint64 num_nongap_samples;
GstAudioInfo in;
GstAudioInfo out;
/* properties */
gint quality;
/* state */
gboolean fp;
gint width;
gint channels;
gint inrate;
gint outrate;
SpeexResamplerSincFilterMode sinc_filter_mode;
guint32 sinc_filter_auto_threshold;
guint8 *tmp_in;
guint tmp_in_size;
guint8 *tmp_out;
guint tmp_out_size;
SpeexResamplerState *state;
const SpeexResampleFuncs *funcs;
};
struct _GstAudioResampleClass {
GstBaseTransformClass parent_class;
};
GType gst_audio_resample_get_type(void);
G_END_DECLS
#endif /* __AUDIO_RESAMPLE_H__ */