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Name	Size	Permission	Date
ac97	[ DIR ]	drwxr-xr-x	2026-07-17 06:29
sof	[ DIR ]	drwxr-xr-x	2026-07-17 06:29
ac97_codec.h	15.8 KB	-rw-r--r--	2024-03-10 20:38
aci.h	2.4 KB	-rw-r--r--	2024-03-10 20:38
acp63_chip_offset_byte.h	29.75 KB	-rw-r--r--	2024-03-10 20:38
ad1816a.h	4.73 KB	-rw-r--r--	2024-03-10 20:38
ad1843.h	1.48 KB	-rw-r--r--	2024-03-10 20:38
adau1373.h	706 B	-rw-r--r--	2024-03-10 20:38
ak4113.h	10.22 KB	-rw-r--r--	2024-03-10 20:38
ak4114.h	9.54 KB	-rw-r--r--	2024-03-10 20:38
ak4117.h	8.34 KB	-rw-r--r--	2024-03-10 20:38
ak4531_codec.h	2.42 KB	-rw-r--r--	2024-03-10 20:38
ak4641.h	476 B	-rw-r--r--	2024-03-10 20:38
ak4xxx-adda.h	2.66 KB	-rw-r--r--	2024-03-10 20:38
alc5623.h	536 B	-rw-r--r--	2024-03-10 20:38
asequencer.h	3.06 KB	-rw-r--r--	2024-03-10 20:38
asound.h	590 B	-rw-r--r--	2024-03-10 20:38
asoundef.h	16.02 KB	-rw-r--r--	2024-03-10 20:38
compress_driver.h	7.8 KB	-rw-r--r--	2024-03-10 20:38
control.h	10.73 KB	-rw-r--r--	2024-03-10 20:38
core.h	15.78 KB	-rw-r--r--	2024-03-10 20:38
cs35l33.h	888 B	-rw-r--r--	2024-03-10 20:38
cs35l34.h	741 B	-rw-r--r--	2024-03-10 20:38
cs35l35.h	2.21 KB	-rw-r--r--	2024-03-10 20:38
cs35l36.h	772 B	-rw-r--r--	2024-03-10 20:38
cs35l41.h	34.14 KB	-rw-r--r--	2024-03-10 20:38
cs35l56.h	10.47 KB	-rw-r--r--	2026-07-01 19:48
cs4231-regs.h	7.6 KB	-rw-r--r--	2024-03-10 20:38
cs4271.h	906 B	-rw-r--r--	2024-03-10 20:38
cs42l42.h	34.51 KB	-rw-r--r--	2024-03-10 20:38
cs42l43.h	385 B	-rw-r--r--	2024-03-10 20:38
cs42l52.h	592 B	-rw-r--r--	2024-03-10 20:38
cs42l56.h	1.02 KB	-rw-r--r--	2024-03-10 20:38
cs42l73.h	361 B	-rw-r--r--	2024-03-10 20:38
cs8403.h	7.95 KB	-rw-r--r--	2024-03-10 20:38
cs8427.h	9.72 KB	-rw-r--r--	2024-03-10 20:38
da7213.h	1.01 KB	-rw-r--r--	2024-03-10 20:38
da7218.h	2.41 KB	-rw-r--r--	2024-03-10 20:38
da7219-aad.h	2.37 KB	-rw-r--r--	2024-03-10 20:38
da7219.h	998 B	-rw-r--r--	2024-03-10 20:38
da9055.h	707 B	-rw-r--r--	2024-03-10 20:38
designware_i2s.h	1.66 KB	-rw-r--r--	2024-03-10 20:38
dmaengine_pcm.h	6.7 KB	-rw-r--r--	2026-07-01 19:48
emu10k1.h	93.94 KB	-rw-r--r--	2026-07-01 19:48
emu10k1_synth.h	693 B	-rw-r--r--	2024-03-10 20:38
emu8000.h	3.25 KB	-rw-r--r--	2024-03-10 20:38
emu8000_reg.h	9.54 KB	-rw-r--r--	2024-03-10 20:38
emux_legacy.h	4.7 KB	-rw-r--r--	2024-03-10 20:38
emux_synth.h	6.78 KB	-rw-r--r--	2024-03-10 20:38
es1688.h	2.85 KB	-rw-r--r--	2024-03-10 20:38
graph_card.h	1.04 KB	-rw-r--r--	2024-03-10 20:38
gus.h	19.65 KB	-rw-r--r--	2024-03-10 20:38
hda-mlink.h	6.13 KB	-rw-r--r--	2024-03-10 20:38
hda_chmap.h	2.6 KB	-rw-r--r--	2024-03-10 20:38
hda_codec.h	17.75 KB	-rw-r--r--	2026-07-01 19:48
hda_component.h	2.04 KB	-rw-r--r--	2024-03-10 20:38
hda_hwdep.h	736 B	-rw-r--r--	2024-03-10 20:38
hda_i915.h	589 B	-rw-r--r--	2024-03-10 20:38
hda_register.h	11.93 KB	-rw-r--r--	2024-03-10 20:38
hda_regmap.h	6.77 KB	-rw-r--r--	2024-03-10 20:38
hda_verbs.h	16.88 KB	-rw-r--r--	2024-03-10 20:38
hdaudio.h	24.4 KB	-rw-r--r--	2024-03-10 20:38
hdaudio_ext.h	4.59 KB	-rw-r--r--	2026-07-01 19:48
hdmi-codec.h	3.04 KB	-rw-r--r--	2024-03-10 20:38
hwdep.h	1.88 KB	-rw-r--r--	2024-03-10 20:38
i2c.h	2.79 KB	-rw-r--r--	2024-03-10 20:38
info.h	7.75 KB	-rw-r--r--	2024-03-10 20:38
initval.h	2.43 KB	-rw-r--r--	2024-03-10 20:38
intel-dsp-config.h	896 B	-rw-r--r--	2024-03-10 20:38
intel-nhlt.h	3.75 KB	-rw-r--r--	2024-03-10 20:38
jack.h	3.1 KB	-rw-r--r--	2024-03-10 20:38
madera-pdata.h	1.95 KB	-rw-r--r--	2024-03-10 20:38
max9768.h	544 B	-rw-r--r--	2024-03-10 20:38
max98088.h	1.05 KB	-rw-r--r--	2024-03-10 20:38
max98090.h	534 B	-rw-r--r--	2024-03-10 20:38
max98095.h	1.33 KB	-rw-r--r--	2024-03-10 20:38
memalloc.h	3.79 KB	-rw-r--r--	2024-03-10 20:38
minors.h	3.65 KB	-rw-r--r--	2024-03-10 20:38
mixer_oss.h	1.73 KB	-rw-r--r--	2024-03-10 20:38
mpu401.h	3.81 KB	-rw-r--r--	2024-03-10 20:38
omap-hdmi-audio.h	971 B	-rw-r--r--	2024-03-10 20:38
opl3.h	11.62 KB	-rw-r--r--	2024-03-10 20:38
opl4.h	459 B	-rw-r--r--	2024-03-10 20:38
pcm-indirect.h	5.18 KB	-rw-r--r--	2024-03-10 20:38
pcm.h	54.31 KB	-rw-r--r--	2026-07-01 19:48
pcm_drm_eld.h	183 B	-rw-r--r--	2024-03-10 20:38
pcm_iec958.h	597 B	-rw-r--r--	2024-03-10 20:38
pcm_oss.h	2.01 KB	-rw-r--r--	2024-03-10 20:38
pcm_params.h	8.72 KB	-rw-r--r--	2024-03-10 20:38
pt2258.h	513 B	-rw-r--r--	2024-03-10 20:38
pxa2xx-lib.h	2.25 KB	-rw-r--r--	2024-03-10 20:38
rawmidi.h	6.01 KB	-rw-r--r--	2024-03-10 20:38
rt1015.h	283 B	-rw-r--r--	2024-03-10 20:38
rt286.h	314 B	-rw-r--r--	2024-03-10 20:38
rt298.h	373 B	-rw-r--r--	2024-03-10 20:38
rt5514.h	399 B	-rw-r--r--	2024-03-10 20:38
rt5659.h	880 B	-rw-r--r--	2024-03-10 20:38
rt5660.h	578 B	-rw-r--r--	2024-03-10 20:38
rt5663.h	476 B	-rw-r--r--	2024-03-10 20:38
rt5665.h	723 B	-rw-r--r--	2024-03-10 20:38
rt5668.h	607 B	-rw-r--r--	2024-03-10 20:38
rt5682.h	862 B	-rw-r--r--	2024-03-10 20:38
rt5682s.h	1.01 KB	-rw-r--r--	2024-03-10 20:38
sb.h	10.3 KB	-rw-r--r--	2024-03-10 20:38
sb16_csp.h	2.05 KB	-rw-r--r--	2024-03-10 20:38
sdw.h	1.63 KB	-rw-r--r--	2024-03-10 20:38
seq_device.h	2.16 KB	-rw-r--r--	2024-03-10 20:38
seq_kernel.h	3.66 KB	-rw-r--r--	2024-03-10 20:38
seq_midi_emul.h	6.6 KB	-rw-r--r--	2024-03-10 20:38
seq_midi_event.h	1.32 KB	-rw-r--r--	2024-03-10 20:38
seq_oss.h	2.21 KB	-rw-r--r--	2024-03-10 20:38
seq_oss_legacy.h	360 B	-rw-r--r--	2024-03-10 20:38
seq_virmidi.h	2.07 KB	-rw-r--r--	2024-03-10 20:38
sh_dac_audio.h	441 B	-rw-r--r--	2024-03-10 20:38
sh_fsi.h	693 B	-rw-r--r--	2024-03-10 20:38
simple_card.h	524 B	-rw-r--r--	2024-03-10 20:38
simple_card_utils.h	8.69 KB	-rw-r--r--	2024-03-10 20:38
snd_wavefront.h	5.49 KB	-rw-r--r--	2026-07-01 19:48
soc-acpi-intel-match.h	2.5 KB	-rw-r--r--	2024-03-10 20:38
soc-acpi.h	7.01 KB	-rw-r--r--	2024-03-10 20:38
soc-card.h	3.56 KB	-rw-r--r--	2024-03-10 20:38
soc-component.h	20.11 KB	-rw-r--r--	2024-03-10 20:38
soc-dai.h	20.75 KB	-rw-r--r--	2024-03-10 20:38
soc-dapm.h	33.45 KB	-rw-r--r--	2024-03-10 20:38
soc-dpcm.h	5.56 KB	-rw-r--r--	2024-03-10 20:38
soc-jack.h	3.73 KB	-rw-r--r--	2024-03-10 20:38
soc-link.h	1.14 KB	-rw-r--r--	2024-03-10 20:38
soc-topology.h	5.74 KB	-rw-r--r--	2024-03-10 20:38
soc.h	53.84 KB	-rw-r--r--	2026-07-01 19:48
sof.h	4.54 KB	-rw-r--r--	2024-03-10 20:38
soundfont.h	3.81 KB	-rw-r--r--	2024-03-10 20:38
spear_dma.h	350 B	-rw-r--r--	2024-03-10 20:38
spear_spdif.h	345 B	-rw-r--r--	2024-03-10 20:38
sta32x.h	1015 B	-rw-r--r--	2024-03-10 20:38
sta350.h	1.44 KB	-rw-r--r--	2024-03-10 20:38
tas2552-plat.h	283 B	-rw-r--r--	2024-03-10 20:38
tas2781-dsp.h	4.85 KB	-rw-r--r--	2026-07-01 19:48
tas2781-tlv.h	579 B	-rw-r--r--	2026-07-01 19:48
tas2781.h	5.27 KB	-rw-r--r--	2026-07-01 19:48
tas5086.h	210 B	-rw-r--r--	2024-03-10 20:38
tea6330t.h	468 B	-rw-r--r--	2024-03-10 20:38
timer.h	4.99 KB	-rw-r--r--	2024-03-10 20:38
tlv.h	1.59 KB	-rw-r--r--	2024-03-10 20:38
tlv320aic32x4.h	1.29 KB	-rw-r--r--	2024-03-10 20:38
tlv320dac33-plat.h	574 B	-rw-r--r--	2024-03-10 20:38
tpa6130a2-plat.h	291 B	-rw-r--r--	2024-03-10 20:38
uda1380.h	335 B	-rw-r--r--	2024-03-10 20:38
ump.h	8.14 KB	-rw-r--r--	2026-07-01 19:48
ump_convert.h	1.25 KB	-rw-r--r--	2026-07-01 19:48
ump_msg.h	13.81 KB	-rw-r--r--	2026-07-01 19:48
util_mem.h	1.58 KB	-rw-r--r--	2024-03-10 20:38
vx_core.h	14.7 KB	-rw-r--r--	2024-03-10 20:38
wavefront.h	16.32 KB	-rw-r--r--	2024-03-10 20:38
wm0010.h	321 B	-rw-r--r--	2024-03-10 20:38
wm2000.h	479 B	-rw-r--r--	2024-03-10 20:38
wm2200.h	1.21 KB	-rw-r--r--	2024-03-10 20:38
wm5100.h	935 B	-rw-r--r--	2024-03-10 20:38
wm8903.h	15.02 KB	-rw-r--r--	2024-03-10 20:38
wm8904.h	7.22 KB	-rw-r--r--	2024-03-10 20:38
wm8955.h	442 B	-rw-r--r--	2024-03-10 20:38
wm8960.h	888 B	-rw-r--r--	2024-03-10 20:38
wm8962.h	1.65 KB	-rw-r--r--	2024-03-10 20:38
wm8993.h	1.05 KB	-rw-r--r--	2024-03-10 20:38
wm8996.h	1.19 KB	-rw-r--r--	2024-03-10 20:38
wm9081.h	515 B	-rw-r--r--	2024-03-10 20:38
wm9090.h	634 B	-rw-r--r--	2024-03-10 20:38
wss.h	7.76 KB	-rw-r--r--	2024-03-10 20:38

Rename

/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
 * Helper functions for indirect PCM data transfer
 *
 *  Copyright (c) by Takashi Iwai <tiwai@suse.de>
 *                   Jaroslav Kysela <perex@perex.cz>
 */

#ifndef __SOUND_PCM_INDIRECT_H
#define __SOUND_PCM_INDIRECT_H

#include <sound/pcm.h>

struct snd_pcm_indirect {
	unsigned int hw_buffer_size;	/* Byte size of hardware buffer */
	unsigned int hw_queue_size;	/* Max queue size of hw buffer (0 = buffer size) */
	unsigned int hw_data;	/* Offset to next dst (or src) in hw ring buffer */
	unsigned int hw_io;	/* Ring buffer hw pointer */
	int hw_ready;		/* Bytes ready for play (or captured) in hw ring buffer */
	unsigned int sw_buffer_size;	/* Byte size of software buffer */
	unsigned int sw_data;	/* Offset to next dst (or src) in sw ring buffer */
	unsigned int sw_io;	/* Current software pointer in bytes */
	int sw_ready;		/* Bytes ready to be transferred to/from hw */
	snd_pcm_uframes_t appl_ptr;	/* Last seen appl_ptr */
};

typedef void (*snd_pcm_indirect_copy_t)(struct snd_pcm_substream *substream,
					struct snd_pcm_indirect *rec, size_t bytes);

/*
 * helper function for playback ack callback
 */
static inline int
snd_pcm_indirect_playback_transfer(struct snd_pcm_substream *substream,
				   struct snd_pcm_indirect *rec,
				   snd_pcm_indirect_copy_t copy)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	snd_pcm_uframes_t appl_ptr = runtime->control->appl_ptr;
	snd_pcm_sframes_t diff = appl_ptr - rec->appl_ptr;
	int qsize;

if (diff) {
		if (diff < -(snd_pcm_sframes_t) (runtime->boundary / 2))
			diff += runtime->boundary;
		if (diff < 0)
			return -EPIPE;
		rec->sw_ready += (int)frames_to_bytes(runtime, diff);
		rec->appl_ptr = appl_ptr;
	}
	qsize = rec->hw_queue_size ? rec->hw_queue_size : rec->hw_buffer_size;
	while (rec->hw_ready < qsize && rec->sw_ready > 0) {
		unsigned int hw_to_end = rec->hw_buffer_size - rec->hw_data;
		unsigned int sw_to_end = rec->sw_buffer_size - rec->sw_data;
		unsigned int bytes = qsize - rec->hw_ready;
		if (rec->sw_ready < (int)bytes)
			bytes = rec->sw_ready;
		if (hw_to_end < bytes)
			bytes = hw_to_end;
		if (sw_to_end < bytes)
			bytes = sw_to_end;
		if (! bytes)
			break;
		copy(substream, rec, bytes);
		rec->hw_data += bytes;
		if (rec->hw_data == rec->hw_buffer_size)
			rec->hw_data = 0;
		rec->sw_data += bytes;
		if (rec->sw_data == rec->sw_buffer_size)
			rec->sw_data = 0;
		rec->hw_ready += bytes;
		rec->sw_ready -= bytes;
	}
	return 0;
}

/*
 * helper function for playback pointer callback
 * ptr = current byte pointer
 */
static inline snd_pcm_uframes_t
snd_pcm_indirect_playback_pointer(struct snd_pcm_substream *substream,
				  struct snd_pcm_indirect *rec, unsigned int ptr)
{
	int bytes = ptr - rec->hw_io;
	int err;

if (bytes < 0)
		bytes += rec->hw_buffer_size;
	rec->hw_io = ptr;
	rec->hw_ready -= bytes;
	rec->sw_io += bytes;
	if (rec->sw_io >= rec->sw_buffer_size)
		rec->sw_io -= rec->sw_buffer_size;
	if (substream->ops->ack) {
		err = substream->ops->ack(substream);
		if (err == -EPIPE)
			return SNDRV_PCM_POS_XRUN;
	}
	return bytes_to_frames(substream->runtime, rec->sw_io);
}

/*
 * helper function for capture ack callback
 */
static inline int
snd_pcm_indirect_capture_transfer(struct snd_pcm_substream *substream,
				  struct snd_pcm_indirect *rec,
				  snd_pcm_indirect_copy_t copy)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	snd_pcm_uframes_t appl_ptr = runtime->control->appl_ptr;
	snd_pcm_sframes_t diff = appl_ptr - rec->appl_ptr;

if (diff) {
		if (diff < -(snd_pcm_sframes_t) (runtime->boundary / 2))
			diff += runtime->boundary;
		if (diff < 0)
			return -EPIPE;
		rec->sw_ready -= frames_to_bytes(runtime, diff);
		rec->appl_ptr = appl_ptr;
	}
	while (rec->hw_ready > 0 && 
	       rec->sw_ready < (int)rec->sw_buffer_size) {
		size_t hw_to_end = rec->hw_buffer_size - rec->hw_data;
		size_t sw_to_end = rec->sw_buffer_size - rec->sw_data;
		size_t bytes = rec->sw_buffer_size - rec->sw_ready;
		if (rec->hw_ready < (int)bytes)
			bytes = rec->hw_ready;
		if (hw_to_end < bytes)
			bytes = hw_to_end;
		if (sw_to_end < bytes)
			bytes = sw_to_end;
		if (! bytes)
			break;
		copy(substream, rec, bytes);
		rec->hw_data += bytes;
		if ((int)rec->hw_data == rec->hw_buffer_size)
			rec->hw_data = 0;
		rec->sw_data += bytes;
		if (rec->sw_data == rec->sw_buffer_size)
			rec->sw_data = 0;
		rec->hw_ready -= bytes;
		rec->sw_ready += bytes;
	}
	return 0;
}

/*
 * helper function for capture pointer callback,
 * ptr = current byte pointer
 */
static inline snd_pcm_uframes_t
snd_pcm_indirect_capture_pointer(struct snd_pcm_substream *substream,
				 struct snd_pcm_indirect *rec, unsigned int ptr)
{
	int qsize;
	int bytes = ptr - rec->hw_io;
	int err;

if (bytes < 0)
		bytes += rec->hw_buffer_size;
	rec->hw_io = ptr;
	rec->hw_ready += bytes;
	qsize = rec->hw_queue_size ? rec->hw_queue_size : rec->hw_buffer_size;
	if (rec->hw_ready > qsize)
		return SNDRV_PCM_POS_XRUN;
	rec->sw_io += bytes;
	if (rec->sw_io >= rec->sw_buffer_size)
		rec->sw_io -= rec->sw_buffer_size;
	if (substream->ops->ack) {
		err = substream->ops->ack(substream);
		if (err == -EPIPE)
			return SNDRV_PCM_POS_XRUN;
	}
	return bytes_to_frames(substream->runtime, rec->sw_io);
}

#endif /* __SOUND_PCM_INDIRECT_H */