void snd_pcm_linear_getput(const snd_pcm_channel_area_t *dst_areas, snd_pcm_uframes_t dst_offset,
const snd_pcm_channel_area_t *src_areas, snd_pcm_uframes_t src_offset,
unsigned int channels, snd_pcm_uframes_t frames,
unsigned int get_idx, unsigned int put_idx)
{
#define CONV24_LABELS
#include "plugin_ops.h"
#undef CONV24_LABELS
void *get = get32_labels[get_idx];
void *put = put32_labels[put_idx];
unsigned int channel;
u_int32_t sample = 0;
for (channel = 0; channel < channels; ++channel) {
const char *src;
char *dst;
int src_step, dst_step;
snd_pcm_uframes_t frames1;
const snd_pcm_channel_area_t *src_area = &src_areas[channel];
const snd_pcm_channel_area_t *dst_area = &dst_areas[channel];
src = snd_pcm_channel_area_addr(src_area, src_offset);
dst = snd_pcm_channel_area_addr(dst_area, dst_offset);
src_step = snd_pcm_channel_area_step(src_area);
dst_step = snd_pcm_channel_area_step(dst_area);
frames1 = frames;
while (frames1-- > 0) {
goto *get;
#define CONV24_END after
#include "plugin_ops.h"
#undef CONV24_END
after:
src += src_step;
dst += dst_step;
}
}
}
void snd_pcm_linear_convert(const snd_pcm_channel_area_t *dst_areas, snd_pcm_uframes_t dst_offset,
const snd_pcm_channel_area_t *src_areas, snd_pcm_uframes_t src_offset,
unsigned int channels, snd_pcm_uframes_t frames,
unsigned int convidx)
{
#define CONV_LABELS
#include "plugin_ops.h"
#undef CONV_LABELS
void *conv = conv_labels[convidx];
unsigned int channel;
for (channel = 0; channel < channels; ++channel) {
const char *src;
char *dst;
int src_step, dst_step;
snd_pcm_uframes_t frames1;
const snd_pcm_channel_area_t *src_area = &src_areas[channel];
const snd_pcm_channel_area_t *dst_area = &dst_areas[channel];
src = snd_pcm_channel_area_addr(src_area, src_offset);
dst = snd_pcm_channel_area_addr(dst_area, dst_offset);
src_step = snd_pcm_channel_area_step(src_area);
dst_step = snd_pcm_channel_area_step(dst_area);
frames1 = frames;
while (frames1-- > 0) {
goto *conv;
#define CONV_END after
#include "plugin_ops.h"
#undef CONV_END
after:
src += src_step;
dst += dst_step;
}
}
}
/* called in pcm lock */
snd_pcm_sframes_t snd_pcm_read_mmap(snd_pcm_t *pcm, snd_pcm_uframes_t offset,
snd_pcm_uframes_t size)
{
snd_pcm_uframes_t xfer = 0;
snd_pcm_sframes_t err = 0;
if (! size)
return 0;
while (xfer < size) {
snd_pcm_uframes_t frames = size - xfer;
snd_pcm_uframes_t cont = pcm->buffer_size - offset;
if (cont < frames)
frames = cont;
switch (pcm->access) {
case SND_PCM_ACCESS_MMAP_INTERLEAVED:
{
const snd_pcm_channel_area_t *a = snd_pcm_mmap_areas(pcm);
char *buf = snd_pcm_channel_area_addr(a, offset);
snd_pcm_unlock(pcm); /* to avoid deadlock */
err = _snd_pcm_readi(pcm, buf, frames);
snd_pcm_lock(pcm);
if (err >= 0)
frames = err;
break;
}
case SND_PCM_ACCESS_MMAP_NONINTERLEAVED:
{
snd_pcm_uframes_t channels = pcm->channels;
unsigned int c;
void *bufs[channels];
const snd_pcm_channel_area_t *areas = snd_pcm_mmap_areas(pcm);
for (c = 0; c < channels; ++c) {
const snd_pcm_channel_area_t *a = &areas[c];
bufs[c] = snd_pcm_channel_area_addr(a, offset);
}
snd_pcm_unlock(pcm); /* to avoid deadlock */
err = _snd_pcm_readn(pcm->fast_op_arg, bufs, frames);
snd_pcm_lock(pcm);
if (err >= 0)
frames = err;
break;
}
default:
SNDMSG("invalid access type %d", pcm->access);
return -EINVAL;
}
if (err < 0)
break;
xfer += frames;
offset = (offset + frames) % pcm->buffer_size;
}
if (xfer > 0)
return xfer;
return err;
}
int snd_pcm_area_silence(const snd_pcm_channel_area_t *dst_area,
snd_pcm_uframes_t dst_offset,
unsigned int samples, snd_pcm_format_t format)
{
char *dst;
unsigned int dst_step;
int width;
if (!dst_area->addr)
return 0;
width = snd_pcm_format_physical_width(format);
if (width < 8)
return area_silence_4bit(dst_area, dst_offset, samples, format);
dst = snd_pcm_channel_area_addr(dst_area, dst_offset);
if (dst_area->step == (unsigned int) width) {
snd_pcm_format_set_silence(format, dst, samples);
return 0;
}
dst_step = dst_area->step / 8;
while (samples-- > 0) {
snd_pcm_format_set_silence(format, dst, 1);
dst += dst_step;
}
return 0;
}
void snd_pcm_lfloat_convert_integer_float(const snd_pcm_channel_area_t *dst_areas, snd_pcm_uframes_t dst_offset,
const snd_pcm_channel_area_t *src_areas, snd_pcm_uframes_t src_offset,
unsigned int channels, snd_pcm_uframes_t frames,
unsigned int get32idx, unsigned int put32floatidx)
{
#define GET32_LABELS
#define PUT32F_LABELS
#include "plugin_ops.h"
#undef PUT32F_LABELS
#undef GET32_LABELS
void *get32 = get32_labels[get32idx];
void *put32float = put32float_labels[put32floatidx];
unsigned int channel;
for (channel = 0; channel < channels; ++channel) {
const char *src;
char *dst;
int src_step, dst_step;
snd_pcm_uframes_t frames1;
int32_t sample = 0;
snd_tmp_float_t tmp_float;
snd_tmp_double_t tmp_double;
const snd_pcm_channel_area_t *src_area = &src_areas[channel];
const snd_pcm_channel_area_t *dst_area = &dst_areas[channel];
src = snd_pcm_channel_area_addr(src_area, src_offset);
dst = snd_pcm_channel_area_addr(dst_area, dst_offset);
src_step = snd_pcm_channel_area_step(src_area);
dst_step = snd_pcm_channel_area_step(dst_area);
frames1 = frames;
while (frames1-- > 0) {
goto *get32;
#define GET32_END sample_loaded
#include "plugin_ops.h"
#undef GET32_END
sample_loaded:
goto *put32float;
#define PUT32F_END sample_put
#include "plugin_ops.h"
#undef PUT32F_END
sample_put:
src += src_step;
dst += dst_step;
}
}
}
static int area_copy_4bit(const snd_pcm_channel_area_t *dst_area,
snd_pcm_uframes_t dst_offset,
const snd_pcm_channel_area_t *src_area,
snd_pcm_uframes_t src_offset,
unsigned int samples, snd_pcm_format_t format)
{
int srcbit = src_area->first % 8;
int srcbit_step = src_area->step % 8;
int dstbit = dst_area->first % 8;
int dstbit_step = dst_area->step % 8;
const unsigned char *src = snd_pcm_channel_area_addr(src_area,
src_offset);
unsigned char *dst = snd_pcm_channel_area_addr(dst_area, dst_offset);
int src_step = src_area->step / 8;
int dst_step = dst_area->step / 8;
while (samples-- > 0) {
unsigned char srcval;
if (srcbit)
srcval = *src & 0x0f;
else
srcval = *src & 0xf0;
if (dstbit)
*dst &= 0xf0;
else
*dst &= 0x0f;
*dst |= srcval;
src += src_step;
srcbit += srcbit_step;
if (srcbit == 8) {
src++;
srcbit = 0;
}
dst += dst_step;
dstbit += dstbit_step;
if (dstbit == 8) {
dst++;
dstbit = 0;
}
}
return 0;
}
int snd_pcm_area_copy(const snd_pcm_channel_area_t *dst_area,
snd_pcm_uframes_t dst_offset,
const snd_pcm_channel_area_t *src_area,
snd_pcm_uframes_t src_offset,
unsigned int samples, snd_pcm_format_t format)
{
const char *src;
char *dst;
int width;
int src_step, dst_step;
if (!dst_area->addr)
return 0;
if (dst_area == src_area && dst_offset == src_offset)
return 0;
if (!src_area->addr)
return snd_pcm_area_silence(dst_area, dst_offset, samples,
format);
width = snd_pcm_format_physical_width(format);
if (width < 8)
return area_copy_4bit(dst_area, dst_offset,
src_area, src_offset,
samples, format);
src = snd_pcm_channel_area_addr(src_area, src_offset);
dst = snd_pcm_channel_area_addr(dst_area, dst_offset);
if (src_area->step == (unsigned int) width &&
dst_area->step == (unsigned int) width) {
memcpy(dst, src, samples * width / 8);
return 0;
}
src_step = src_area->step / 8;
dst_step = dst_area->step / 8;
width /= 8;
while (samples-- > 0) {
memcpy(dst, src, width);
src += src_step;
dst += dst_step;
}
return 0;
}
static int area_silence_4bit(const snd_pcm_channel_area_t *dst_area,
snd_pcm_uframes_t dst_offset,
unsigned int samples, snd_pcm_format_t format)
{
char *dst = snd_pcm_channel_area_addr(dst_area, dst_offset);
int dst_step = dst_area->step / 8;
int dstbit = dst_area->first % 8;
int dstbit_step = dst_area->step % 8;
while (samples-- > 0) {
if (dstbit)
*dst &= 0xf0;
else
*dst &= 0x0f;
dst += dst_step;
dstbit += dstbit_step;
if (dstbit == 8) {
dst++;
dstbit = 0;
}
}
return 0;
}