Пример #1
0
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;
		}
	}
}
Пример #2
0
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;
		}
	}
}
Пример #3
0
/* 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;
}
Пример #4
0
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;
}
Пример #5
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;
		}
	}
}
Пример #6
0
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;
}
Пример #7
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;
}
Пример #8
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;
}