gstreamer/gst-libs/gst/audio/audio-resampler-macros.h

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/* GStreamer
* Copyright (C) <2015> Wim Taymans <wim.taymans@gmail.com>
*
* 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., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifndef __GST_AUDIO_RESAMPLER_MACROS_H__
#define __GST_AUDIO_RESAMPLER_MACROS_H__
#include <string.h>
#include "audio-resampler-private.h"
#define PRECISION_S16 15
#define PRECISION_S32 31
#define DECL_GET_TAPS_FULL_FUNC(type) \
gpointer \
get_taps_##type##_full (GstAudioResampler * resampler, \
gint *samp_index, gint *samp_phase, type icoeff[4])
DECL_GET_TAPS_FULL_FUNC (gint16);
DECL_GET_TAPS_FULL_FUNC (gint32);
DECL_GET_TAPS_FULL_FUNC (gfloat);
DECL_GET_TAPS_FULL_FUNC (gdouble);
#define DECL_GET_TAPS_INTERPOLATE_FUNC(type, inter) \
gpointer \
get_taps_##type##_##inter (GstAudioResampler * resampler, \
gint *samp_index, gint *samp_phase, type icoeff[4]) \
DECL_GET_TAPS_INTERPOLATE_FUNC (gint16, linear);
DECL_GET_TAPS_INTERPOLATE_FUNC (gint32, linear);
DECL_GET_TAPS_INTERPOLATE_FUNC (gfloat, linear);
DECL_GET_TAPS_INTERPOLATE_FUNC (gdouble, linear);
DECL_GET_TAPS_INTERPOLATE_FUNC (gint16, cubic);
DECL_GET_TAPS_INTERPOLATE_FUNC (gint32, cubic);
DECL_GET_TAPS_INTERPOLATE_FUNC (gfloat, cubic);
DECL_GET_TAPS_INTERPOLATE_FUNC (gdouble, cubic);
#define DECL_RESAMPLE_FUNC(type,inter,channels,arch) \
void \
resample_ ##type## _ ##inter## _ ##channels## _ ##arch (GstAudioResampler * resampler, \
gpointer in[], gsize in_len, gpointer out[], gsize out_len, \
gsize * consumed)
#define MAKE_RESAMPLE_FUNC(type,inter,channels,arch) \
DECL_RESAMPLE_FUNC (type, inter, channels, arch) \
{ \
gint c, di = 0; \
gint n_taps = resampler->n_taps; \
gint blocks = resampler->blocks; \
gint ostride = resampler->ostride; \
gint taps_stride = resampler->taps_stride; \
gint samp_index = 0; \
gint samp_phase = 0; \
\
for (c = 0; c < blocks; c++) { \
type *ip = in[c]; \
type *op = ostride == 1 ? out[c] : (type *)out[0] + c; \
\
samp_index = resampler->samp_index; \
samp_phase = resampler->samp_phase; \
\
for (di = 0; di < out_len; di++) { \
type *ipp, icoeff[4], *taps; \
\
ipp = &ip[samp_index * channels]; \
\
taps = get_taps_ ##type##_##inter \
(resampler, &samp_index, &samp_phase, icoeff); \
inner_product_ ##type##_##inter##_##channels##_##arch \
(op, ipp, taps, n_taps, icoeff, taps_stride); \
op += ostride; \
} \
if (in_len > samp_index) \
memmove (ip, &ip[samp_index * channels], \
(in_len - samp_index) * sizeof(type) * channels); \
} \
*consumed = samp_index - resampler->samp_index; \
\
resampler->samp_index = 0; \
resampler->samp_phase = samp_phase; \
}
#define DECL_RESAMPLE_FUNC_STATIC(type,inter,channels,arch) \
static DECL_RESAMPLE_FUNC (type, inter, channels, arch)
#define MAKE_RESAMPLE_FUNC_STATIC(type,inter,channels,arch) \
static MAKE_RESAMPLE_FUNC (type, inter, channels, arch)
#endif /* __GST_AUDIO_RESAMPLER_MACROS_H__ */