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/**
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* \file pcm/pcm_lfloat.c
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* \ingroup PCM_Plugins
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* \brief PCM Linear<->Float Conversion Plugin Interface
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* \author Jaroslav Kysela <perex@perex.cz>
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* \date 2001
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*/
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/*
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* PCM - Linear Integer <-> Linear Float conversion
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* Copyright (c) 2001 by Jaroslav Kysela <perex@perex.cz>
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*
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*
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* This library is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as
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* published by the Free Software Foundation; either version 2.1 of
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* the License, or (at your option) any later version.
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*
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* This program 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
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*/
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#include "bswap.h"
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#include "pcm_local.h"
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#include "pcm_plugin.h"
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#include "plugin_ops.h"
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#ifndef DOC_HIDDEN
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typedef float float_t;
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typedef double double_t;
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#if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ <= 91)
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#define BUGGY_GCC
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#endif
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#ifndef PIC
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/* entry for static linking */
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const char *_snd_module_pcm_lfloat = "";
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#endif
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typedef struct {
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/* This field need to be the first */
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snd_pcm_plugin_t plug;
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unsigned int int32_idx;
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unsigned int float32_idx;
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snd_pcm_format_t sformat;
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void (*func)(const snd_pcm_channel_area_t *dst_areas, snd_pcm_uframes_t dst_offset,
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const snd_pcm_channel_area_t *src_areas, snd_pcm_uframes_t src_offset,
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unsigned int channels, snd_pcm_uframes_t frames,
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unsigned int get32idx, unsigned int put32floatidx);
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} snd_pcm_lfloat_t;
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int snd_pcm_lfloat_get_s32_index(snd_pcm_format_t format)
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{
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int width, endian;
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db8eaa |
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switch (format) {
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case SND_PCM_FORMAT_FLOAT_LE:
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case SND_PCM_FORMAT_FLOAT_BE:
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width = 32;
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break;
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case SND_PCM_FORMAT_FLOAT64_LE:
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case SND_PCM_FORMAT_FLOAT64_BE:
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width = 64;
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break;
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default:
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return -EINVAL;
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}
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#ifdef SND_LITTLE_ENDIAN
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endian = snd_pcm_format_big_endian(format);
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#else
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endian = snd_pcm_format_little_endian(format);
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#endif
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return ((width / 32)-1) * 2 + endian;
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}
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int snd_pcm_lfloat_put_s32_index(snd_pcm_format_t format)
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{
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return snd_pcm_lfloat_get_s32_index(format);
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}
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db8eaa |
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#endif /* DOC_HIDDEN */
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db8eaa |
#ifndef BUGGY_GCC
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#ifndef DOC_HIDDEN
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void snd_pcm_lfloat_convert_integer_float(const snd_pcm_channel_area_t *dst_areas, snd_pcm_uframes_t dst_offset,
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const snd_pcm_channel_area_t *src_areas, snd_pcm_uframes_t src_offset,
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unsigned int channels, snd_pcm_uframes_t frames,
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unsigned int get32idx, unsigned int put32floatidx)
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{
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#define GET32_LABELS
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#define PUT32F_LABELS
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#include "plugin_ops.h"
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#undef PUT32F_LABELS
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#undef GET32_LABELS
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void *get32 = get32_labels[get32idx];
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void *put32float = put32float_labels[put32floatidx];
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unsigned int channel;
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for (channel = 0; channel < channels; ++channel) {
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const char *src;
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char *dst;
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int src_step, dst_step;
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snd_pcm_uframes_t frames1;
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int32_t sample = 0;
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snd_tmp_float_t tmp_float;
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db8eaa |
snd_tmp_double_t tmp_double;
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const snd_pcm_channel_area_t *src_area = &src_areas[channel];
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const snd_pcm_channel_area_t *dst_area = &dst_areas[channel];
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src = snd_pcm_channel_area_addr(src_area, src_offset);
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dst = snd_pcm_channel_area_addr(dst_area, dst_offset);
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src_step = snd_pcm_channel_area_step(src_area);
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dst_step = snd_pcm_channel_area_step(dst_area);
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frames1 = frames;
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while (frames1-- > 0) {
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db8eaa |
goto *get32;
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db8eaa |
#define GET32_END sample_loaded
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#include "plugin_ops.h"
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#undef GET32_END
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sample_loaded:
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goto *put32float;
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#define PUT32F_END sample_put
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#include "plugin_ops.h"
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#undef PUT32F_END
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sample_put:
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src += src_step;
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dst += dst_step;
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}
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}
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}
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db8eaa |
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void snd_pcm_lfloat_convert_float_integer(const snd_pcm_channel_area_t *dst_areas, snd_pcm_uframes_t dst_offset,
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const snd_pcm_channel_area_t *src_areas, snd_pcm_uframes_t src_offset,
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db8eaa |
unsigned int channels, snd_pcm_uframes_t frames,
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db8eaa |
unsigned int put32idx, unsigned int get32floatidx)
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db8eaa |
{
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db8eaa |
#define PUT32_LABELS
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db8eaa |
#define GET32F_LABELS
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db8eaa |
#include "plugin_ops.h"
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db8eaa |
#undef GET32F_LABELS
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db8eaa |
#undef PUT32_LABELS
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db8eaa |
void *put32 = put32_labels[put32idx];
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void *get32float = get32float_labels[get32floatidx];
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unsigned int channel;
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db8eaa |
for (channel = 0; channel < channels; ++channel) {
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db8eaa |
const char *src;
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db8eaa |
char *dst;
|
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db8eaa |
int src_step, dst_step;
|
|
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db8eaa |
snd_pcm_uframes_t frames1;
|
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db8eaa |
int32_t sample = 0;
|
|
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db8eaa |
snd_tmp_float_t tmp_float;
|
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db8eaa |
snd_tmp_double_t tmp_double;
|
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db8eaa |
const snd_pcm_channel_area_t *src_area = &src_areas[channel];
|
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db8eaa |
const snd_pcm_channel_area_t *dst_area = &dst_areas[channel];
|
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db8eaa |
src = snd_pcm_channel_area_addr(src_area, src_offset);
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db8eaa |
dst = snd_pcm_channel_area_addr(dst_area, dst_offset);
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db8eaa |
src_step = snd_pcm_channel_area_step(src_area);
|
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db8eaa |
dst_step = snd_pcm_channel_area_step(dst_area);
|
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db8eaa |
frames1 = frames;
|
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db8eaa |
while (frames1-- > 0) {
|
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Packit Service |
db8eaa |
goto *get32float;
|
|
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db8eaa |
#define GET32F_END sample_loaded
|
|
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db8eaa |
#include "plugin_ops.h"
|
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db8eaa |
#undef GET32F_END
|
|
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db8eaa |
sample_loaded:
|
|
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db8eaa |
goto *put32;
|
|
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db8eaa |
#define PUT32_END sample_put
|
|
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db8eaa |
#include "plugin_ops.h"
|
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db8eaa |
#undef PUT32_END
|
|
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db8eaa |
sample_put:
|
|
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db8eaa |
src += src_step;
|
|
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db8eaa |
dst += dst_step;
|
|
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db8eaa |
}
|
|
Packit Service |
db8eaa |
}
|
|
Packit Service |
db8eaa |
}
|
|
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db8eaa |
|
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db8eaa |
#endif /* DOC_HIDDEN */
|
|
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db8eaa |
|
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db8eaa |
static int snd_pcm_lfloat_hw_refine_cprepare(snd_pcm_t *pcm, snd_pcm_hw_params_t *params)
|
|
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db8eaa |
{
|
|
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db8eaa |
snd_pcm_lfloat_t *lfloat = pcm->private_data;
|
|
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db8eaa |
int err;
|
|
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db8eaa |
snd_pcm_access_mask_t access_mask = { SND_PCM_ACCBIT_SHM };
|
|
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db8eaa |
snd_pcm_format_mask_t lformat_mask = { SND_PCM_FMTBIT_LINEAR };
|
|
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db8eaa |
snd_pcm_format_mask_t fformat_mask = { SND_PCM_FMTBIT_FLOAT };
|
|
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db8eaa |
err = _snd_pcm_hw_param_set_mask(params, SND_PCM_HW_PARAM_ACCESS,
|
|
Packit Service |
db8eaa |
&access_mask);
|
|
Packit Service |
db8eaa |
if (err < 0)
|
|
Packit Service |
db8eaa |
return err;
|
|
Packit Service |
db8eaa |
err = _snd_pcm_hw_param_set_mask(params, SND_PCM_HW_PARAM_FORMAT,
|
|
Packit Service |
db8eaa |
snd_pcm_format_linear(lfloat->sformat) ?
|
|
Packit Service |
db8eaa |
&fformat_mask : &lformat_mask);
|
|
Packit Service |
db8eaa |
if (err < 0)
|
|
Packit Service |
db8eaa |
return err;
|
|
Packit Service |
db8eaa |
err = _snd_pcm_hw_params_set_subformat(params, SND_PCM_SUBFORMAT_STD);
|
|
Packit Service |
db8eaa |
if (err < 0)
|
|
Packit Service |
db8eaa |
return err;
|
|
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db8eaa |
params->info &= ~(SND_PCM_INFO_MMAP | SND_PCM_INFO_MMAP_VALID);
|
|
Packit Service |
db8eaa |
return 0;
|
|
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db8eaa |
}
|
|
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db8eaa |
|
|
Packit Service |
db8eaa |
static int snd_pcm_lfloat_hw_refine_sprepare(snd_pcm_t *pcm, snd_pcm_hw_params_t *sparams)
|
|
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db8eaa |
{
|
|
Packit Service |
db8eaa |
snd_pcm_lfloat_t *lfloat = pcm->private_data;
|
|
Packit Service |
db8eaa |
snd_pcm_access_mask_t saccess_mask = { SND_PCM_ACCBIT_MMAP };
|
|
Packit Service |
db8eaa |
_snd_pcm_hw_params_any(sparams);
|
|
Packit Service |
db8eaa |
_snd_pcm_hw_param_set_mask(sparams, SND_PCM_HW_PARAM_ACCESS,
|
|
Packit Service |
db8eaa |
&saccess_mask);
|
|
Packit Service |
db8eaa |
_snd_pcm_hw_params_set_format(sparams, lfloat->sformat);
|
|
Packit Service |
db8eaa |
_snd_pcm_hw_params_set_subformat(sparams, SND_PCM_SUBFORMAT_STD);
|
|
Packit Service |
db8eaa |
return 0;
|
|
Packit Service |
db8eaa |
}
|
|
Packit Service |
db8eaa |
|
|
Packit Service |
db8eaa |
static int snd_pcm_lfloat_hw_refine_schange(snd_pcm_t *pcm ATTRIBUTE_UNUSED, snd_pcm_hw_params_t *params,
|
|
Packit Service |
db8eaa |
snd_pcm_hw_params_t *sparams)
|
|
Packit Service |
db8eaa |
{
|
|
Packit Service |
db8eaa |
int err;
|
|
Packit Service |
db8eaa |
unsigned int links = (SND_PCM_HW_PARBIT_CHANNELS |
|
|
Packit Service |
db8eaa |
SND_PCM_HW_PARBIT_RATE |
|
|
Packit Service |
db8eaa |
SND_PCM_HW_PARBIT_PERIOD_SIZE |
|
|
Packit Service |
db8eaa |
SND_PCM_HW_PARBIT_BUFFER_SIZE |
|
|
Packit Service |
db8eaa |
SND_PCM_HW_PARBIT_PERIODS |
|
|
Packit Service |
db8eaa |
SND_PCM_HW_PARBIT_PERIOD_TIME |
|
|
Packit Service |
db8eaa |
SND_PCM_HW_PARBIT_BUFFER_TIME |
|
|
Packit Service |
db8eaa |
SND_PCM_HW_PARBIT_TICK_TIME);
|
|
Packit Service |
db8eaa |
err = _snd_pcm_hw_params_refine(sparams, links, params);
|
|
Packit Service |
db8eaa |
if (err < 0)
|
|
Packit Service |
db8eaa |
return err;
|
|
Packit Service |
db8eaa |
return 0;
|
|
Packit Service |
db8eaa |
}
|
|
Packit Service |
db8eaa |
|
|
Packit Service |
db8eaa |
static int snd_pcm_lfloat_hw_refine_cchange(snd_pcm_t *pcm ATTRIBUTE_UNUSED, snd_pcm_hw_params_t *params,
|
|
Packit Service |
db8eaa |
snd_pcm_hw_params_t *sparams)
|
|
Packit Service |
db8eaa |
{
|
|
Packit Service |
db8eaa |
int err;
|
|
Packit Service |
db8eaa |
unsigned int links = (SND_PCM_HW_PARBIT_CHANNELS |
|
|
Packit Service |
db8eaa |
SND_PCM_HW_PARBIT_RATE |
|
|
Packit Service |
db8eaa |
SND_PCM_HW_PARBIT_PERIOD_SIZE |
|
|
Packit Service |
db8eaa |
SND_PCM_HW_PARBIT_BUFFER_SIZE |
|
|
Packit Service |
db8eaa |
SND_PCM_HW_PARBIT_PERIODS |
|
|
Packit Service |
db8eaa |
SND_PCM_HW_PARBIT_PERIOD_TIME |
|
|
Packit Service |
db8eaa |
SND_PCM_HW_PARBIT_BUFFER_TIME |
|
|
Packit Service |
db8eaa |
SND_PCM_HW_PARBIT_TICK_TIME);
|
|
Packit Service |
db8eaa |
err = _snd_pcm_hw_params_refine(params, links, sparams);
|
|
Packit Service |
db8eaa |
if (err < 0)
|
|
Packit Service |
db8eaa |
return err;
|
|
Packit Service |
db8eaa |
return 0;
|
|
Packit Service |
db8eaa |
}
|
|
Packit Service |
db8eaa |
|
|
Packit Service |
db8eaa |
static int snd_pcm_lfloat_hw_refine(snd_pcm_t *pcm, snd_pcm_hw_params_t *params)
|
|
Packit Service |
db8eaa |
{
|
|
Packit Service |
db8eaa |
return snd_pcm_hw_refine_slave(pcm, params,
|
|
Packit Service |
db8eaa |
snd_pcm_lfloat_hw_refine_cprepare,
|
|
Packit Service |
db8eaa |
snd_pcm_lfloat_hw_refine_cchange,
|
|
Packit Service |
db8eaa |
snd_pcm_lfloat_hw_refine_sprepare,
|
|
Packit Service |
db8eaa |
snd_pcm_lfloat_hw_refine_schange,
|
|
Packit Service |
db8eaa |
snd_pcm_generic_hw_refine);
|
|
Packit Service |
db8eaa |
}
|
|
Packit Service |
db8eaa |
|
|
Packit Service |
db8eaa |
static int snd_pcm_lfloat_hw_params(snd_pcm_t *pcm, snd_pcm_hw_params_t *params)
|
|
Packit Service |
db8eaa |
{
|
|
Packit Service |
db8eaa |
snd_pcm_lfloat_t *lfloat = pcm->private_data;
|
|
Packit Service |
db8eaa |
snd_pcm_t *slave = lfloat->plug.gen.slave;
|
|
Packit Service |
db8eaa |
snd_pcm_format_t src_format, dst_format;
|
|
Packit Service |
db8eaa |
int err = snd_pcm_hw_params_slave(pcm, params,
|
|
Packit Service |
db8eaa |
snd_pcm_lfloat_hw_refine_cchange,
|
|
Packit Service |
db8eaa |
snd_pcm_lfloat_hw_refine_sprepare,
|
|
Packit Service |
db8eaa |
snd_pcm_lfloat_hw_refine_schange,
|
|
Packit Service |
db8eaa |
snd_pcm_generic_hw_params);
|
|
Packit Service |
db8eaa |
if (err < 0)
|
|
Packit Service |
db8eaa |
return err;
|
|
Packit Service |
db8eaa |
if (pcm->stream == SND_PCM_STREAM_PLAYBACK) {
|
|
Packit Service |
db8eaa |
err = INTERNAL(snd_pcm_hw_params_get_format)(params, &src_format);
|
|
Packit Service |
db8eaa |
dst_format = slave->format;
|
|
Packit Service |
db8eaa |
} else {
|
|
Packit Service |
db8eaa |
src_format = slave->format;
|
|
Packit Service |
db8eaa |
err = INTERNAL(snd_pcm_hw_params_get_format)(params, &dst_format);
|
|
Packit Service |
db8eaa |
}
|
|
Packit Service |
db8eaa |
if (snd_pcm_format_linear(src_format)) {
|
|
Packit Service |
db8eaa |
lfloat->int32_idx = snd_pcm_linear_get_index(src_format, SND_PCM_FORMAT_S32);
|
|
Packit Service |
db8eaa |
lfloat->float32_idx = snd_pcm_lfloat_put_s32_index(dst_format);
|
|
Packit Service |
db8eaa |
lfloat->func = snd_pcm_lfloat_convert_integer_float;
|
|
Packit Service |
db8eaa |
} else {
|
|
Packit Service |
db8eaa |
lfloat->int32_idx = snd_pcm_linear_put_index(SND_PCM_FORMAT_S32, dst_format);
|
|
Packit Service |
db8eaa |
lfloat->float32_idx = snd_pcm_lfloat_get_s32_index(src_format);
|
|
Packit Service |
db8eaa |
lfloat->func = snd_pcm_lfloat_convert_float_integer;
|
|
Packit Service |
db8eaa |
}
|
|
Packit Service |
db8eaa |
return 0;
|
|
Packit Service |
db8eaa |
}
|
|
Packit Service |
db8eaa |
|
|
Packit Service |
db8eaa |
static snd_pcm_uframes_t
|
|
Packit Service |
db8eaa |
snd_pcm_lfloat_write_areas(snd_pcm_t *pcm,
|
|
Packit Service |
db8eaa |
const snd_pcm_channel_area_t *areas,
|
|
Packit Service |
db8eaa |
snd_pcm_uframes_t offset,
|
|
Packit Service |
db8eaa |
snd_pcm_uframes_t size,
|
|
Packit Service |
db8eaa |
const snd_pcm_channel_area_t *slave_areas,
|
|
Packit Service |
db8eaa |
snd_pcm_uframes_t slave_offset,
|
|
Packit Service |
db8eaa |
snd_pcm_uframes_t *slave_sizep)
|
|
Packit Service |
db8eaa |
{
|
|
Packit Service |
db8eaa |
snd_pcm_lfloat_t *lfloat = pcm->private_data;
|
|
Packit Service |
db8eaa |
if (size > *slave_sizep)
|
|
Packit Service |
db8eaa |
size = *slave_sizep;
|
|
Packit Service |
db8eaa |
lfloat->func(slave_areas, slave_offset,
|
|
Packit Service |
db8eaa |
areas, offset,
|
|
Packit Service |
db8eaa |
pcm->channels, size,
|
|
Packit Service |
db8eaa |
lfloat->int32_idx, lfloat->float32_idx);
|
|
Packit Service |
db8eaa |
*slave_sizep = size;
|
|
Packit Service |
db8eaa |
return size;
|
|
Packit Service |
db8eaa |
}
|
|
Packit Service |
db8eaa |
|
|
Packit Service |
db8eaa |
static snd_pcm_uframes_t
|
|
Packit Service |
db8eaa |
snd_pcm_lfloat_read_areas(snd_pcm_t *pcm,
|
|
Packit Service |
db8eaa |
const snd_pcm_channel_area_t *areas,
|
|
Packit Service |
db8eaa |
snd_pcm_uframes_t offset,
|
|
Packit Service |
db8eaa |
snd_pcm_uframes_t size,
|
|
Packit Service |
db8eaa |
const snd_pcm_channel_area_t *slave_areas,
|
|
Packit Service |
db8eaa |
snd_pcm_uframes_t slave_offset,
|
|
Packit Service |
db8eaa |
snd_pcm_uframes_t *slave_sizep)
|
|
Packit Service |
db8eaa |
{
|
|
Packit Service |
db8eaa |
snd_pcm_lfloat_t *lfloat = pcm->private_data;
|
|
Packit Service |
db8eaa |
if (size > *slave_sizep)
|
|
Packit Service |
db8eaa |
size = *slave_sizep;
|
|
Packit Service |
db8eaa |
lfloat->func(areas, offset,
|
|
Packit Service |
db8eaa |
slave_areas, slave_offset,
|
|
Packit Service |
db8eaa |
pcm->channels, size,
|
|
Packit Service |
db8eaa |
lfloat->int32_idx, lfloat->float32_idx);
|
|
Packit Service |
db8eaa |
*slave_sizep = size;
|
|
Packit Service |
db8eaa |
return size;
|
|
Packit Service |
db8eaa |
}
|
|
Packit Service |
db8eaa |
|
|
Packit Service |
db8eaa |
static void snd_pcm_lfloat_dump(snd_pcm_t *pcm, snd_output_t *out)
|
|
Packit Service |
db8eaa |
{
|
|
Packit Service |
db8eaa |
snd_pcm_lfloat_t *lfloat = pcm->private_data;
|
|
Packit Service |
db8eaa |
snd_output_printf(out, "Linear Integer <-> Linear Float conversion PCM (%s)\n",
|
|
Packit Service |
db8eaa |
snd_pcm_format_name(lfloat->sformat));
|
|
Packit Service |
db8eaa |
if (pcm->setup) {
|
|
Packit Service |
db8eaa |
snd_output_printf(out, "Its setup is:\n");
|
|
Packit Service |
db8eaa |
snd_pcm_dump_setup(pcm, out);
|
|
Packit Service |
db8eaa |
}
|
|
Packit Service |
db8eaa |
snd_output_printf(out, "Slave: ");
|
|
Packit Service |
db8eaa |
snd_pcm_dump(lfloat->plug.gen.slave, out);
|
|
Packit Service |
db8eaa |
}
|
|
Packit Service |
db8eaa |
|
|
Packit Service |
db8eaa |
static const snd_pcm_ops_t snd_pcm_lfloat_ops = {
|
|
Packit Service |
db8eaa |
.close = snd_pcm_generic_close,
|
|
Packit Service |
db8eaa |
.info = snd_pcm_generic_info,
|
|
Packit Service |
db8eaa |
.hw_refine = snd_pcm_lfloat_hw_refine,
|
|
Packit Service |
db8eaa |
.hw_params = snd_pcm_lfloat_hw_params,
|
|
Packit Service |
db8eaa |
.hw_free = snd_pcm_generic_hw_free,
|
|
Packit Service |
db8eaa |
.sw_params = snd_pcm_generic_sw_params,
|
|
Packit Service |
db8eaa |
.channel_info = snd_pcm_generic_channel_info,
|
|
Packit Service |
db8eaa |
.dump = snd_pcm_lfloat_dump,
|
|
Packit Service |
db8eaa |
.nonblock = snd_pcm_generic_nonblock,
|
|
Packit Service |
db8eaa |
.async = snd_pcm_generic_async,
|
|
Packit Service |
db8eaa |
.mmap = snd_pcm_generic_mmap,
|
|
Packit Service |
db8eaa |
.munmap = snd_pcm_generic_munmap,
|
|
Packit Service |
db8eaa |
.query_chmaps = snd_pcm_generic_query_chmaps,
|
|
Packit Service |
db8eaa |
.get_chmap = snd_pcm_generic_get_chmap,
|
|
Packit Service |
db8eaa |
.set_chmap = snd_pcm_generic_set_chmap,
|
|
Packit Service |
db8eaa |
};
|
|
Packit Service |
db8eaa |
|
|
Packit Service |
db8eaa |
/**
|
|
Packit Service |
db8eaa |
* \brief Creates a new linear conversion PCM
|
|
Packit Service |
db8eaa |
* \param pcmp Returns created PCM handle
|
|
Packit Service |
db8eaa |
* \param name Name of PCM
|
|
Packit Service |
db8eaa |
* \param sformat Slave (destination) format
|
|
Packit Service |
db8eaa |
* \param slave Slave PCM handle
|
|
Packit Service |
db8eaa |
* \param close_slave When set, the slave PCM handle is closed with copy PCM
|
|
Packit Service |
db8eaa |
* \retval zero on success otherwise a negative error code
|
|
Packit Service |
db8eaa |
* \warning Using of this function might be dangerous in the sense
|
|
Packit Service |
db8eaa |
* of compatibility reasons. The prototype might be freely
|
|
Packit Service |
db8eaa |
* changed in future.
|
|
Packit Service |
db8eaa |
*/
|
|
Packit Service |
db8eaa |
int snd_pcm_lfloat_open(snd_pcm_t **pcmp, const char *name, snd_pcm_format_t sformat, snd_pcm_t *slave, int close_slave)
|
|
Packit Service |
db8eaa |
{
|
|
Packit Service |
db8eaa |
snd_pcm_t *pcm;
|
|
Packit Service |
db8eaa |
snd_pcm_lfloat_t *lfloat;
|
|
Packit Service |
db8eaa |
int err;
|
|
Packit Service |
db8eaa |
assert(pcmp && slave);
|
|
Packit Service |
db8eaa |
if (snd_pcm_format_linear(sformat) != 1 &&
|
|
Packit Service |
db8eaa |
snd_pcm_format_float(sformat) != 1)
|
|
Packit Service |
db8eaa |
return -EINVAL;
|
|
Packit Service |
db8eaa |
lfloat = calloc(1, sizeof(snd_pcm_lfloat_t));
|
|
Packit Service |
db8eaa |
if (!lfloat) {
|
|
Packit Service |
db8eaa |
return -ENOMEM;
|
|
Packit Service |
db8eaa |
}
|
|
Packit Service |
db8eaa |
snd_pcm_plugin_init(&lfloat->plug);
|
|
Packit Service |
db8eaa |
lfloat->sformat = sformat;
|
|
Packit Service |
db8eaa |
lfloat->plug.read = snd_pcm_lfloat_read_areas;
|
|
Packit Service |
db8eaa |
lfloat->plug.write = snd_pcm_lfloat_write_areas;
|
|
Packit Service |
db8eaa |
lfloat->plug.undo_read = snd_pcm_plugin_undo_read_generic;
|
|
Packit Service |
db8eaa |
lfloat->plug.undo_write = snd_pcm_plugin_undo_write_generic;
|
|
Packit Service |
db8eaa |
lfloat->plug.gen.slave = slave;
|
|
Packit Service |
db8eaa |
lfloat->plug.gen.close_slave = close_slave;
|
|
Packit Service |
db8eaa |
|
|
Packit Service |
db8eaa |
err = snd_pcm_new(&pcm, SND_PCM_TYPE_LINEAR_FLOAT, name, slave->stream, slave->mode);
|
|
Packit Service |
db8eaa |
if (err < 0) {
|
|
Packit Service |
db8eaa |
free(lfloat);
|
|
Packit Service |
db8eaa |
return err;
|
|
Packit Service |
db8eaa |
}
|
|
Packit Service |
db8eaa |
pcm->ops = &snd_pcm_lfloat_ops;
|
|
Packit Service |
db8eaa |
pcm->fast_ops = &snd_pcm_plugin_fast_ops;
|
|
Packit Service |
db8eaa |
pcm->private_data = lfloat;
|
|
Packit Service |
db8eaa |
pcm->poll_fd = slave->poll_fd;
|
|
Packit Service |
db8eaa |
pcm->poll_events = slave->poll_events;
|
|
Packit Service |
db8eaa |
pcm->tstamp_type = slave->tstamp_type;
|
|
Packit Service |
db8eaa |
snd_pcm_set_hw_ptr(pcm, &lfloat->plug.hw_ptr, -1, 0);
|
|
Packit Service |
db8eaa |
snd_pcm_set_appl_ptr(pcm, &lfloat->plug.appl_ptr, -1, 0);
|
|
Packit Service |
db8eaa |
*pcmp = pcm;
|
|
Packit Service |
db8eaa |
|
|
Packit Service |
db8eaa |
return 0;
|
|
Packit Service |
db8eaa |
}
|
|
Packit Service |
db8eaa |
|
|
Packit Service |
db8eaa |
/*! \page pcm_plugins
|
|
Packit Service |
db8eaa |
|
|
Packit Service |
db8eaa |
\section pcm_plugins_lfloat Plugin: linear<->float
|
|
Packit Service |
db8eaa |
|
|
Packit Service |
db8eaa |
This plugin converts linear to float samples and float to linear samples from master
|
|
Packit Service |
db8eaa |
linear<->float conversion PCM to given slave PCM. The channel count, format and rate must
|
|
Packit Service |
db8eaa |
match for both of them.
|
|
Packit Service |
db8eaa |
|
|
Packit Service |
db8eaa |
\code
|
|
Packit Service |
db8eaa |
pcm.name {
|
|
Packit Service |
db8eaa |
type lfloat # Linear<->Float conversion PCM
|
|
Packit Service |
db8eaa |
slave STR # Slave name
|
|
Packit Service |
db8eaa |
# or
|
|
Packit Service |
db8eaa |
slave { # Slave definition
|
|
Packit Service |
db8eaa |
pcm STR # Slave PCM name
|
|
Packit Service |
db8eaa |
# or
|
|
Packit Service |
db8eaa |
pcm { } # Slave PCM definition
|
|
Packit Service |
db8eaa |
format STR # Slave format
|
|
Packit Service |
db8eaa |
}
|
|
Packit Service |
db8eaa |
}
|
|
Packit Service |
db8eaa |
\endcode
|
|
Packit Service |
db8eaa |
|
|
Packit Service |
db8eaa |
\subsection pcm_plugins_lfloat_funcref Function reference
|
|
Packit Service |
db8eaa |
|
|
Packit Service |
db8eaa |
|
|
Packit Service |
db8eaa |
snd_pcm_lfloat_open()
|
|
Packit Service |
db8eaa |
_snd_pcm_lfloat_open()
|
|
Packit Service |
db8eaa |
|
|
Packit Service |
db8eaa |
|
|
Packit Service |
db8eaa |
*/
|
|
Packit Service |
db8eaa |
|
|
Packit Service |
db8eaa |
/**
|
|
Packit Service |
db8eaa |
* \brief Creates a new linear<->float conversion PCM
|
|
Packit Service |
db8eaa |
* \param pcmp Returns created PCM handle
|
|
Packit Service |
db8eaa |
* \param name Name of PCM
|
|
Packit Service |
db8eaa |
* \param root Root configuration node
|
|
Packit Service |
db8eaa |
* \param conf Configuration node with copy PCM description
|
|
Packit Service |
db8eaa |
* \param stream Stream type
|
|
Packit Service |
db8eaa |
* \param mode Stream mode
|
|
Packit Service |
db8eaa |
* \retval zero on success otherwise a negative error code
|
|
Packit Service |
db8eaa |
* \warning Using of this function might be dangerous in the sense
|
|
Packit Service |
db8eaa |
* of compatibility reasons. The prototype might be freely
|
|
Packit Service |
db8eaa |
* changed in future.
|
|
Packit Service |
db8eaa |
*/
|
|
Packit Service |
db8eaa |
int _snd_pcm_lfloat_open(snd_pcm_t **pcmp, const char *name,
|
|
Packit Service |
db8eaa |
snd_config_t *root, snd_config_t *conf,
|
|
Packit Service |
db8eaa |
snd_pcm_stream_t stream, int mode)
|
|
Packit Service |
db8eaa |
{
|
|
Packit Service |
db8eaa |
snd_config_iterator_t i, next;
|
|
Packit Service |
db8eaa |
int err;
|
|
Packit Service |
db8eaa |
snd_pcm_t *spcm;
|
|
Packit Service |
db8eaa |
snd_config_t *slave = NULL, *sconf;
|
|
Packit Service |
db8eaa |
snd_pcm_format_t sformat;
|
|
Packit Service |
db8eaa |
snd_config_for_each(i, next, conf) {
|
|
Packit Service |
db8eaa |
snd_config_t *n = snd_config_iterator_entry(i);
|
|
Packit Service |
db8eaa |
const char *id;
|
|
Packit Service |
db8eaa |
if (snd_config_get_id(n, &id) < 0)
|
|
Packit Service |
db8eaa |
continue;
|
|
Packit Service |
db8eaa |
if (snd_pcm_conf_generic_id(id))
|
|
Packit Service |
db8eaa |
continue;
|
|
Packit Service |
db8eaa |
if (strcmp(id, "slave") == 0) {
|
|
Packit Service |
db8eaa |
slave = n;
|
|
Packit Service |
db8eaa |
continue;
|
|
Packit Service |
db8eaa |
}
|
|
Packit Service |
db8eaa |
SNDERR("Unknown field %s", id);
|
|
Packit Service |
db8eaa |
return -EINVAL;
|
|
Packit Service |
db8eaa |
}
|
|
Packit Service |
db8eaa |
if (!slave) {
|
|
Packit Service |
db8eaa |
SNDERR("slave is not defined");
|
|
Packit Service |
db8eaa |
return -EINVAL;
|
|
Packit Service |
db8eaa |
}
|
|
Packit Service |
db8eaa |
err = snd_pcm_slave_conf(root, slave, &sconf, 1,
|
|
Packit Service |
db8eaa |
SND_PCM_HW_PARAM_FORMAT, SCONF_MANDATORY, &sformat);
|
|
Packit Service |
db8eaa |
if (err < 0)
|
|
Packit Service |
db8eaa |
return err;
|
|
Packit Service |
db8eaa |
if (snd_pcm_format_linear(sformat) != 1 &&
|
|
Packit Service |
db8eaa |
snd_pcm_format_float(sformat) != 1) {
|
|
Packit Service |
db8eaa |
snd_config_delete(sconf);
|
|
Packit Service |
db8eaa |
SNDERR("slave format is not linear integer or linear float");
|
|
Packit Service |
db8eaa |
return -EINVAL;
|
|
Packit Service |
db8eaa |
}
|
|
Packit Service |
db8eaa |
err = snd_pcm_open_slave(&spcm, root, sconf, stream, mode, conf);
|
|
Packit Service |
db8eaa |
snd_config_delete(sconf);
|
|
Packit Service |
db8eaa |
if (err < 0)
|
|
Packit Service |
db8eaa |
return err;
|
|
Packit Service |
db8eaa |
err = snd_pcm_lfloat_open(pcmp, name, sformat, spcm, 1);
|
|
Packit Service |
db8eaa |
if (err < 0)
|
|
Packit Service |
db8eaa |
snd_pcm_close(spcm);
|
|
Packit Service |
db8eaa |
return err;
|
|
Packit Service |
db8eaa |
}
|
|
Packit Service |
db8eaa |
#ifndef DOC_HIDDEN
|
|
Packit Service |
db8eaa |
SND_DLSYM_BUILD_VERSION(_snd_pcm_lfloat_open, SND_PCM_DLSYM_VERSION);
|
|
Packit Service |
db8eaa |
#endif
|
|
Packit Service |
db8eaa |
|
|
Packit Service |
db8eaa |
#else /* BUGGY_GCC */
|
|
Packit Service |
db8eaa |
|
|
Packit Service |
db8eaa |
int snd_pcm_lfloat_open(snd_pcm_t **pcmp ATTRIBUTE_UNUSED,
|
|
Packit Service |
db8eaa |
const char *name ATTRIBUTE_UNUSED,
|
|
Packit Service |
db8eaa |
snd_pcm_format_t sformat ATTRIBUTE_UNUSED,
|
|
Packit Service |
db8eaa |
snd_pcm_t *slave ATTRIBUTE_UNUSED,
|
|
Packit Service |
db8eaa |
int close_slave ATTRIBUTE_UNUSED)
|
|
Packit Service |
db8eaa |
{
|
|
Packit Service |
db8eaa |
SNDERR("please, upgrade your GCC to use lfloat plugin");
|
|
Packit Service |
db8eaa |
return -EINVAL;
|
|
Packit Service |
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}
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db8eaa |
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int _snd_pcm_lfloat_open(snd_pcm_t **pcmp ATTRIBUTE_UNUSED,
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const char *name ATTRIBUTE_UNUSED,
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snd_config_t *root ATTRIBUTE_UNUSED,
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snd_config_t *conf ATTRIBUTE_UNUSED,
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snd_pcm_stream_t stream ATTRIBUTE_UNUSED,
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int mode ATTRIBUTE_UNUSED)
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{
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SNDERR("please, upgrade your GCC to use lfloat plugin");
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return -EINVAL;
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}
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#endif /* BUGGY_GCC */
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