mirror of https://gitee.com/openkylin/linux.git
1499 lines
50 KiB
C
1499 lines
50 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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#ifndef __SOUND_PCM_H
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#define __SOUND_PCM_H
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/*
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* Digital Audio (PCM) abstract layer
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* Copyright (c) by Jaroslav Kysela <perex@perex.cz>
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* Abramo Bagnara <abramo@alsa-project.org>
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*/
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#include <sound/asound.h>
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#include <sound/memalloc.h>
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#include <sound/minors.h>
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#include <linux/poll.h>
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#include <linux/mm.h>
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#include <linux/bitops.h>
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#include <linux/pm_qos.h>
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#include <linux/refcount.h>
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#define snd_pcm_substream_chip(substream) ((substream)->private_data)
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#define snd_pcm_chip(pcm) ((pcm)->private_data)
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#if IS_ENABLED(CONFIG_SND_PCM_OSS)
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#include <sound/pcm_oss.h>
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#endif
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/*
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* Hardware (lowlevel) section
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*/
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struct snd_pcm_hardware {
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unsigned int info; /* SNDRV_PCM_INFO_* */
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u64 formats; /* SNDRV_PCM_FMTBIT_* */
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unsigned int rates; /* SNDRV_PCM_RATE_* */
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unsigned int rate_min; /* min rate */
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unsigned int rate_max; /* max rate */
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unsigned int channels_min; /* min channels */
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unsigned int channels_max; /* max channels */
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size_t buffer_bytes_max; /* max buffer size */
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size_t period_bytes_min; /* min period size */
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size_t period_bytes_max; /* max period size */
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unsigned int periods_min; /* min # of periods */
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unsigned int periods_max; /* max # of periods */
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size_t fifo_size; /* fifo size in bytes */
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};
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struct snd_pcm_status64;
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struct snd_pcm_substream;
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struct snd_pcm_audio_tstamp_config; /* definitions further down */
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struct snd_pcm_audio_tstamp_report;
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struct snd_pcm_ops {
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int (*open)(struct snd_pcm_substream *substream);
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int (*close)(struct snd_pcm_substream *substream);
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int (*ioctl)(struct snd_pcm_substream * substream,
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unsigned int cmd, void *arg);
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int (*hw_params)(struct snd_pcm_substream *substream,
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struct snd_pcm_hw_params *params);
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int (*hw_free)(struct snd_pcm_substream *substream);
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int (*prepare)(struct snd_pcm_substream *substream);
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int (*trigger)(struct snd_pcm_substream *substream, int cmd);
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int (*sync_stop)(struct snd_pcm_substream *substream);
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snd_pcm_uframes_t (*pointer)(struct snd_pcm_substream *substream);
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int (*get_time_info)(struct snd_pcm_substream *substream,
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struct timespec64 *system_ts, struct timespec64 *audio_ts,
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struct snd_pcm_audio_tstamp_config *audio_tstamp_config,
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struct snd_pcm_audio_tstamp_report *audio_tstamp_report);
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int (*fill_silence)(struct snd_pcm_substream *substream, int channel,
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unsigned long pos, unsigned long bytes);
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int (*copy_user)(struct snd_pcm_substream *substream, int channel,
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unsigned long pos, void __user *buf,
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unsigned long bytes);
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int (*copy_kernel)(struct snd_pcm_substream *substream, int channel,
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unsigned long pos, void *buf, unsigned long bytes);
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struct page *(*page)(struct snd_pcm_substream *substream,
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unsigned long offset);
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int (*mmap)(struct snd_pcm_substream *substream, struct vm_area_struct *vma);
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int (*ack)(struct snd_pcm_substream *substream);
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};
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/*
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*
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*/
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#if defined(CONFIG_SND_DYNAMIC_MINORS)
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#define SNDRV_PCM_DEVICES (SNDRV_OS_MINORS-2)
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#else
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#define SNDRV_PCM_DEVICES 8
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#endif
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#define SNDRV_PCM_IOCTL1_RESET 0
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/* 1 is absent slot. */
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#define SNDRV_PCM_IOCTL1_CHANNEL_INFO 2
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/* 3 is absent slot. */
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#define SNDRV_PCM_IOCTL1_FIFO_SIZE 4
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#define SNDRV_PCM_TRIGGER_STOP 0
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#define SNDRV_PCM_TRIGGER_START 1
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#define SNDRV_PCM_TRIGGER_PAUSE_PUSH 3
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#define SNDRV_PCM_TRIGGER_PAUSE_RELEASE 4
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#define SNDRV_PCM_TRIGGER_SUSPEND 5
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#define SNDRV_PCM_TRIGGER_RESUME 6
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#define SNDRV_PCM_TRIGGER_DRAIN 7
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#define SNDRV_PCM_POS_XRUN ((snd_pcm_uframes_t)-1)
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/* If you change this don't forget to change rates[] table in pcm_native.c */
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#define SNDRV_PCM_RATE_5512 (1<<0) /* 5512Hz */
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#define SNDRV_PCM_RATE_8000 (1<<1) /* 8000Hz */
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#define SNDRV_PCM_RATE_11025 (1<<2) /* 11025Hz */
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#define SNDRV_PCM_RATE_16000 (1<<3) /* 16000Hz */
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#define SNDRV_PCM_RATE_22050 (1<<4) /* 22050Hz */
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#define SNDRV_PCM_RATE_32000 (1<<5) /* 32000Hz */
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#define SNDRV_PCM_RATE_44100 (1<<6) /* 44100Hz */
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#define SNDRV_PCM_RATE_48000 (1<<7) /* 48000Hz */
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#define SNDRV_PCM_RATE_64000 (1<<8) /* 64000Hz */
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#define SNDRV_PCM_RATE_88200 (1<<9) /* 88200Hz */
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#define SNDRV_PCM_RATE_96000 (1<<10) /* 96000Hz */
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#define SNDRV_PCM_RATE_176400 (1<<11) /* 176400Hz */
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#define SNDRV_PCM_RATE_192000 (1<<12) /* 192000Hz */
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#define SNDRV_PCM_RATE_352800 (1<<13) /* 352800Hz */
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#define SNDRV_PCM_RATE_384000 (1<<14) /* 384000Hz */
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#define SNDRV_PCM_RATE_CONTINUOUS (1<<30) /* continuous range */
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#define SNDRV_PCM_RATE_KNOT (1<<31) /* supports more non-continuos rates */
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#define SNDRV_PCM_RATE_8000_44100 (SNDRV_PCM_RATE_8000|SNDRV_PCM_RATE_11025|\
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SNDRV_PCM_RATE_16000|SNDRV_PCM_RATE_22050|\
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SNDRV_PCM_RATE_32000|SNDRV_PCM_RATE_44100)
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#define SNDRV_PCM_RATE_8000_48000 (SNDRV_PCM_RATE_8000_44100|SNDRV_PCM_RATE_48000)
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#define SNDRV_PCM_RATE_8000_96000 (SNDRV_PCM_RATE_8000_48000|SNDRV_PCM_RATE_64000|\
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SNDRV_PCM_RATE_88200|SNDRV_PCM_RATE_96000)
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#define SNDRV_PCM_RATE_8000_192000 (SNDRV_PCM_RATE_8000_96000|SNDRV_PCM_RATE_176400|\
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SNDRV_PCM_RATE_192000)
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#define SNDRV_PCM_RATE_8000_384000 (SNDRV_PCM_RATE_8000_192000|\
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SNDRV_PCM_RATE_352800|\
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SNDRV_PCM_RATE_384000)
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#define _SNDRV_PCM_FMTBIT(fmt) (1ULL << (__force int)SNDRV_PCM_FORMAT_##fmt)
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#define SNDRV_PCM_FMTBIT_S8 _SNDRV_PCM_FMTBIT(S8)
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#define SNDRV_PCM_FMTBIT_U8 _SNDRV_PCM_FMTBIT(U8)
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#define SNDRV_PCM_FMTBIT_S16_LE _SNDRV_PCM_FMTBIT(S16_LE)
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#define SNDRV_PCM_FMTBIT_S16_BE _SNDRV_PCM_FMTBIT(S16_BE)
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#define SNDRV_PCM_FMTBIT_U16_LE _SNDRV_PCM_FMTBIT(U16_LE)
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#define SNDRV_PCM_FMTBIT_U16_BE _SNDRV_PCM_FMTBIT(U16_BE)
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#define SNDRV_PCM_FMTBIT_S24_LE _SNDRV_PCM_FMTBIT(S24_LE)
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#define SNDRV_PCM_FMTBIT_S24_BE _SNDRV_PCM_FMTBIT(S24_BE)
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#define SNDRV_PCM_FMTBIT_U24_LE _SNDRV_PCM_FMTBIT(U24_LE)
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#define SNDRV_PCM_FMTBIT_U24_BE _SNDRV_PCM_FMTBIT(U24_BE)
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#define SNDRV_PCM_FMTBIT_S32_LE _SNDRV_PCM_FMTBIT(S32_LE)
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#define SNDRV_PCM_FMTBIT_S32_BE _SNDRV_PCM_FMTBIT(S32_BE)
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#define SNDRV_PCM_FMTBIT_U32_LE _SNDRV_PCM_FMTBIT(U32_LE)
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#define SNDRV_PCM_FMTBIT_U32_BE _SNDRV_PCM_FMTBIT(U32_BE)
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#define SNDRV_PCM_FMTBIT_FLOAT_LE _SNDRV_PCM_FMTBIT(FLOAT_LE)
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#define SNDRV_PCM_FMTBIT_FLOAT_BE _SNDRV_PCM_FMTBIT(FLOAT_BE)
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#define SNDRV_PCM_FMTBIT_FLOAT64_LE _SNDRV_PCM_FMTBIT(FLOAT64_LE)
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#define SNDRV_PCM_FMTBIT_FLOAT64_BE _SNDRV_PCM_FMTBIT(FLOAT64_BE)
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#define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE _SNDRV_PCM_FMTBIT(IEC958_SUBFRAME_LE)
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#define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE _SNDRV_PCM_FMTBIT(IEC958_SUBFRAME_BE)
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#define SNDRV_PCM_FMTBIT_MU_LAW _SNDRV_PCM_FMTBIT(MU_LAW)
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#define SNDRV_PCM_FMTBIT_A_LAW _SNDRV_PCM_FMTBIT(A_LAW)
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#define SNDRV_PCM_FMTBIT_IMA_ADPCM _SNDRV_PCM_FMTBIT(IMA_ADPCM)
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#define SNDRV_PCM_FMTBIT_MPEG _SNDRV_PCM_FMTBIT(MPEG)
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#define SNDRV_PCM_FMTBIT_GSM _SNDRV_PCM_FMTBIT(GSM)
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#define SNDRV_PCM_FMTBIT_S20_LE _SNDRV_PCM_FMTBIT(S20_LE)
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#define SNDRV_PCM_FMTBIT_U20_LE _SNDRV_PCM_FMTBIT(U20_LE)
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#define SNDRV_PCM_FMTBIT_S20_BE _SNDRV_PCM_FMTBIT(S20_BE)
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#define SNDRV_PCM_FMTBIT_U20_BE _SNDRV_PCM_FMTBIT(U20_BE)
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#define SNDRV_PCM_FMTBIT_SPECIAL _SNDRV_PCM_FMTBIT(SPECIAL)
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#define SNDRV_PCM_FMTBIT_S24_3LE _SNDRV_PCM_FMTBIT(S24_3LE)
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#define SNDRV_PCM_FMTBIT_U24_3LE _SNDRV_PCM_FMTBIT(U24_3LE)
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#define SNDRV_PCM_FMTBIT_S24_3BE _SNDRV_PCM_FMTBIT(S24_3BE)
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#define SNDRV_PCM_FMTBIT_U24_3BE _SNDRV_PCM_FMTBIT(U24_3BE)
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#define SNDRV_PCM_FMTBIT_S20_3LE _SNDRV_PCM_FMTBIT(S20_3LE)
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#define SNDRV_PCM_FMTBIT_U20_3LE _SNDRV_PCM_FMTBIT(U20_3LE)
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#define SNDRV_PCM_FMTBIT_S20_3BE _SNDRV_PCM_FMTBIT(S20_3BE)
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#define SNDRV_PCM_FMTBIT_U20_3BE _SNDRV_PCM_FMTBIT(U20_3BE)
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#define SNDRV_PCM_FMTBIT_S18_3LE _SNDRV_PCM_FMTBIT(S18_3LE)
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#define SNDRV_PCM_FMTBIT_U18_3LE _SNDRV_PCM_FMTBIT(U18_3LE)
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#define SNDRV_PCM_FMTBIT_S18_3BE _SNDRV_PCM_FMTBIT(S18_3BE)
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#define SNDRV_PCM_FMTBIT_U18_3BE _SNDRV_PCM_FMTBIT(U18_3BE)
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#define SNDRV_PCM_FMTBIT_G723_24 _SNDRV_PCM_FMTBIT(G723_24)
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#define SNDRV_PCM_FMTBIT_G723_24_1B _SNDRV_PCM_FMTBIT(G723_24_1B)
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#define SNDRV_PCM_FMTBIT_G723_40 _SNDRV_PCM_FMTBIT(G723_40)
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#define SNDRV_PCM_FMTBIT_G723_40_1B _SNDRV_PCM_FMTBIT(G723_40_1B)
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#define SNDRV_PCM_FMTBIT_DSD_U8 _SNDRV_PCM_FMTBIT(DSD_U8)
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#define SNDRV_PCM_FMTBIT_DSD_U16_LE _SNDRV_PCM_FMTBIT(DSD_U16_LE)
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#define SNDRV_PCM_FMTBIT_DSD_U32_LE _SNDRV_PCM_FMTBIT(DSD_U32_LE)
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#define SNDRV_PCM_FMTBIT_DSD_U16_BE _SNDRV_PCM_FMTBIT(DSD_U16_BE)
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#define SNDRV_PCM_FMTBIT_DSD_U32_BE _SNDRV_PCM_FMTBIT(DSD_U32_BE)
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#ifdef SNDRV_LITTLE_ENDIAN
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#define SNDRV_PCM_FMTBIT_S16 SNDRV_PCM_FMTBIT_S16_LE
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#define SNDRV_PCM_FMTBIT_U16 SNDRV_PCM_FMTBIT_U16_LE
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#define SNDRV_PCM_FMTBIT_S24 SNDRV_PCM_FMTBIT_S24_LE
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#define SNDRV_PCM_FMTBIT_U24 SNDRV_PCM_FMTBIT_U24_LE
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#define SNDRV_PCM_FMTBIT_S32 SNDRV_PCM_FMTBIT_S32_LE
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#define SNDRV_PCM_FMTBIT_U32 SNDRV_PCM_FMTBIT_U32_LE
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#define SNDRV_PCM_FMTBIT_FLOAT SNDRV_PCM_FMTBIT_FLOAT_LE
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#define SNDRV_PCM_FMTBIT_FLOAT64 SNDRV_PCM_FMTBIT_FLOAT64_LE
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#define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE
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#define SNDRV_PCM_FMTBIT_S20 SNDRV_PCM_FMTBIT_S20_LE
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#define SNDRV_PCM_FMTBIT_U20 SNDRV_PCM_FMTBIT_U20_LE
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#endif
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#ifdef SNDRV_BIG_ENDIAN
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#define SNDRV_PCM_FMTBIT_S16 SNDRV_PCM_FMTBIT_S16_BE
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#define SNDRV_PCM_FMTBIT_U16 SNDRV_PCM_FMTBIT_U16_BE
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#define SNDRV_PCM_FMTBIT_S24 SNDRV_PCM_FMTBIT_S24_BE
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#define SNDRV_PCM_FMTBIT_U24 SNDRV_PCM_FMTBIT_U24_BE
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#define SNDRV_PCM_FMTBIT_S32 SNDRV_PCM_FMTBIT_S32_BE
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#define SNDRV_PCM_FMTBIT_U32 SNDRV_PCM_FMTBIT_U32_BE
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#define SNDRV_PCM_FMTBIT_FLOAT SNDRV_PCM_FMTBIT_FLOAT_BE
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#define SNDRV_PCM_FMTBIT_FLOAT64 SNDRV_PCM_FMTBIT_FLOAT64_BE
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#define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE
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#define SNDRV_PCM_FMTBIT_S20 SNDRV_PCM_FMTBIT_S20_BE
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#define SNDRV_PCM_FMTBIT_U20 SNDRV_PCM_FMTBIT_U20_BE
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#endif
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struct snd_pcm_file {
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struct snd_pcm_substream *substream;
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int no_compat_mmap;
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unsigned int user_pversion; /* supported protocol version */
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};
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struct snd_pcm_hw_rule;
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typedef int (*snd_pcm_hw_rule_func_t)(struct snd_pcm_hw_params *params,
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struct snd_pcm_hw_rule *rule);
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struct snd_pcm_hw_rule {
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unsigned int cond;
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int var;
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int deps[4];
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snd_pcm_hw_rule_func_t func;
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void *private;
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};
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struct snd_pcm_hw_constraints {
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struct snd_mask masks[SNDRV_PCM_HW_PARAM_LAST_MASK -
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SNDRV_PCM_HW_PARAM_FIRST_MASK + 1];
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struct snd_interval intervals[SNDRV_PCM_HW_PARAM_LAST_INTERVAL -
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SNDRV_PCM_HW_PARAM_FIRST_INTERVAL + 1];
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unsigned int rules_num;
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unsigned int rules_all;
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struct snd_pcm_hw_rule *rules;
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};
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static inline struct snd_mask *constrs_mask(struct snd_pcm_hw_constraints *constrs,
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snd_pcm_hw_param_t var)
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{
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return &constrs->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK];
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}
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static inline struct snd_interval *constrs_interval(struct snd_pcm_hw_constraints *constrs,
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snd_pcm_hw_param_t var)
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{
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return &constrs->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL];
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}
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struct snd_ratnum {
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unsigned int num;
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unsigned int den_min, den_max, den_step;
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};
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struct snd_ratden {
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unsigned int num_min, num_max, num_step;
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unsigned int den;
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};
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struct snd_pcm_hw_constraint_ratnums {
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int nrats;
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const struct snd_ratnum *rats;
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};
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struct snd_pcm_hw_constraint_ratdens {
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int nrats;
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const struct snd_ratden *rats;
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};
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struct snd_pcm_hw_constraint_list {
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const unsigned int *list;
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unsigned int count;
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unsigned int mask;
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};
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struct snd_pcm_hw_constraint_ranges {
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unsigned int count;
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const struct snd_interval *ranges;
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unsigned int mask;
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};
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/*
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* userspace-provided audio timestamp config to kernel,
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* structure is for internal use only and filled with dedicated unpack routine
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*/
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struct snd_pcm_audio_tstamp_config {
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/* 5 of max 16 bits used */
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u32 type_requested:4;
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u32 report_delay:1; /* add total delay to A/D or D/A */
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};
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static inline void snd_pcm_unpack_audio_tstamp_config(__u32 data,
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struct snd_pcm_audio_tstamp_config *config)
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{
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config->type_requested = data & 0xF;
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config->report_delay = (data >> 4) & 1;
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}
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/*
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* kernel-provided audio timestamp report to user-space
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* structure is for internal use only and read by dedicated pack routine
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*/
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struct snd_pcm_audio_tstamp_report {
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/* 6 of max 16 bits used for bit-fields */
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/* for backwards compatibility */
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u32 valid:1;
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/* actual type if hardware could not support requested timestamp */
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u32 actual_type:4;
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/* accuracy represented in ns units */
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u32 accuracy_report:1; /* 0 if accuracy unknown, 1 if accuracy field is valid */
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u32 accuracy; /* up to 4.29s, will be packed in separate field */
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};
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static inline void snd_pcm_pack_audio_tstamp_report(__u32 *data, __u32 *accuracy,
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const struct snd_pcm_audio_tstamp_report *report)
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{
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u32 tmp;
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tmp = report->accuracy_report;
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tmp <<= 4;
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tmp |= report->actual_type;
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tmp <<= 1;
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tmp |= report->valid;
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*data &= 0xffff; /* zero-clear MSBs */
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*data |= (tmp << 16);
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*accuracy = report->accuracy;
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}
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struct snd_pcm_runtime {
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/* -- Status -- */
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struct snd_pcm_substream *trigger_master;
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struct timespec64 trigger_tstamp; /* trigger timestamp */
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bool trigger_tstamp_latched; /* trigger timestamp latched in low-level driver/hardware */
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int overrange;
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snd_pcm_uframes_t avail_max;
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snd_pcm_uframes_t hw_ptr_base; /* Position at buffer restart */
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snd_pcm_uframes_t hw_ptr_interrupt; /* Position at interrupt time */
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unsigned long hw_ptr_jiffies; /* Time when hw_ptr is updated */
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unsigned long hw_ptr_buffer_jiffies; /* buffer time in jiffies */
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snd_pcm_sframes_t delay; /* extra delay; typically FIFO size */
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u64 hw_ptr_wrap; /* offset for hw_ptr due to boundary wrap-around */
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/* -- HW params -- */
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snd_pcm_access_t access; /* access mode */
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snd_pcm_format_t format; /* SNDRV_PCM_FORMAT_* */
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snd_pcm_subformat_t subformat; /* subformat */
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unsigned int rate; /* rate in Hz */
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unsigned int channels; /* channels */
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snd_pcm_uframes_t period_size; /* period size */
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unsigned int periods; /* periods */
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snd_pcm_uframes_t buffer_size; /* buffer size */
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snd_pcm_uframes_t min_align; /* Min alignment for the format */
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size_t byte_align;
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unsigned int frame_bits;
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unsigned int sample_bits;
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unsigned int info;
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unsigned int rate_num;
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unsigned int rate_den;
|
|
unsigned int no_period_wakeup: 1;
|
|
|
|
/* -- SW params -- */
|
|
int tstamp_mode; /* mmap timestamp is updated */
|
|
unsigned int period_step;
|
|
snd_pcm_uframes_t start_threshold;
|
|
snd_pcm_uframes_t stop_threshold;
|
|
snd_pcm_uframes_t silence_threshold; /* Silence filling happens when
|
|
noise is nearest than this */
|
|
snd_pcm_uframes_t silence_size; /* Silence filling size */
|
|
snd_pcm_uframes_t boundary; /* pointers wrap point */
|
|
|
|
snd_pcm_uframes_t silence_start; /* starting pointer to silence area */
|
|
snd_pcm_uframes_t silence_filled; /* size filled with silence */
|
|
|
|
union snd_pcm_sync_id sync; /* hardware synchronization ID */
|
|
|
|
/* -- mmap -- */
|
|
struct snd_pcm_mmap_status *status;
|
|
struct snd_pcm_mmap_control *control;
|
|
|
|
/* -- locking / scheduling -- */
|
|
snd_pcm_uframes_t twake; /* do transfer (!poll) wakeup if non-zero */
|
|
wait_queue_head_t sleep; /* poll sleep */
|
|
wait_queue_head_t tsleep; /* transfer sleep */
|
|
struct fasync_struct *fasync;
|
|
bool stop_operating; /* sync_stop will be called */
|
|
|
|
/* -- private section -- */
|
|
void *private_data;
|
|
void (*private_free)(struct snd_pcm_runtime *runtime);
|
|
|
|
/* -- hardware description -- */
|
|
struct snd_pcm_hardware hw;
|
|
struct snd_pcm_hw_constraints hw_constraints;
|
|
|
|
/* -- timer -- */
|
|
unsigned int timer_resolution; /* timer resolution */
|
|
int tstamp_type; /* timestamp type */
|
|
|
|
/* -- DMA -- */
|
|
unsigned char *dma_area; /* DMA area */
|
|
dma_addr_t dma_addr; /* physical bus address (not accessible from main CPU) */
|
|
size_t dma_bytes; /* size of DMA area */
|
|
|
|
struct snd_dma_buffer *dma_buffer_p; /* allocated buffer */
|
|
unsigned int buffer_changed:1; /* buffer allocation changed; set only in managed mode */
|
|
|
|
/* -- audio timestamp config -- */
|
|
struct snd_pcm_audio_tstamp_config audio_tstamp_config;
|
|
struct snd_pcm_audio_tstamp_report audio_tstamp_report;
|
|
struct timespec64 driver_tstamp;
|
|
|
|
#if IS_ENABLED(CONFIG_SND_PCM_OSS)
|
|
/* -- OSS things -- */
|
|
struct snd_pcm_oss_runtime oss;
|
|
#endif
|
|
};
|
|
|
|
struct snd_pcm_group { /* keep linked substreams */
|
|
spinlock_t lock;
|
|
struct mutex mutex;
|
|
struct list_head substreams;
|
|
refcount_t refs;
|
|
};
|
|
|
|
struct pid;
|
|
|
|
struct snd_pcm_substream {
|
|
struct snd_pcm *pcm;
|
|
struct snd_pcm_str *pstr;
|
|
void *private_data; /* copied from pcm->private_data */
|
|
int number;
|
|
char name[32]; /* substream name */
|
|
int stream; /* stream (direction) */
|
|
struct pm_qos_request latency_pm_qos_req; /* pm_qos request */
|
|
size_t buffer_bytes_max; /* limit ring buffer size */
|
|
struct snd_dma_buffer dma_buffer;
|
|
size_t dma_max;
|
|
/* -- hardware operations -- */
|
|
const struct snd_pcm_ops *ops;
|
|
/* -- runtime information -- */
|
|
struct snd_pcm_runtime *runtime;
|
|
/* -- timer section -- */
|
|
struct snd_timer *timer; /* timer */
|
|
unsigned timer_running: 1; /* time is running */
|
|
long wait_time; /* time in ms for R/W to wait for avail */
|
|
/* -- next substream -- */
|
|
struct snd_pcm_substream *next;
|
|
/* -- linked substreams -- */
|
|
struct list_head link_list; /* linked list member */
|
|
struct snd_pcm_group self_group; /* fake group for non linked substream (with substream lock inside) */
|
|
struct snd_pcm_group *group; /* pointer to current group */
|
|
/* -- assigned files -- */
|
|
int ref_count;
|
|
atomic_t mmap_count;
|
|
unsigned int f_flags;
|
|
void (*pcm_release)(struct snd_pcm_substream *);
|
|
struct pid *pid;
|
|
#if IS_ENABLED(CONFIG_SND_PCM_OSS)
|
|
/* -- OSS things -- */
|
|
struct snd_pcm_oss_substream oss;
|
|
#endif
|
|
#ifdef CONFIG_SND_VERBOSE_PROCFS
|
|
struct snd_info_entry *proc_root;
|
|
#endif /* CONFIG_SND_VERBOSE_PROCFS */
|
|
/* misc flags */
|
|
unsigned int hw_opened: 1;
|
|
unsigned int managed_buffer_alloc:1;
|
|
};
|
|
|
|
#define SUBSTREAM_BUSY(substream) ((substream)->ref_count > 0)
|
|
|
|
|
|
struct snd_pcm_str {
|
|
int stream; /* stream (direction) */
|
|
struct snd_pcm *pcm;
|
|
/* -- substreams -- */
|
|
unsigned int substream_count;
|
|
unsigned int substream_opened;
|
|
struct snd_pcm_substream *substream;
|
|
#if IS_ENABLED(CONFIG_SND_PCM_OSS)
|
|
/* -- OSS things -- */
|
|
struct snd_pcm_oss_stream oss;
|
|
#endif
|
|
#ifdef CONFIG_SND_VERBOSE_PROCFS
|
|
struct snd_info_entry *proc_root;
|
|
#ifdef CONFIG_SND_PCM_XRUN_DEBUG
|
|
unsigned int xrun_debug; /* 0 = disabled, 1 = verbose, 2 = stacktrace */
|
|
#endif
|
|
#endif
|
|
struct snd_kcontrol *chmap_kctl; /* channel-mapping controls */
|
|
struct device dev;
|
|
};
|
|
|
|
struct snd_pcm {
|
|
struct snd_card *card;
|
|
struct list_head list;
|
|
int device; /* device number */
|
|
unsigned int info_flags;
|
|
unsigned short dev_class;
|
|
unsigned short dev_subclass;
|
|
char id[64];
|
|
char name[80];
|
|
struct snd_pcm_str streams[2];
|
|
struct mutex open_mutex;
|
|
wait_queue_head_t open_wait;
|
|
void *private_data;
|
|
void (*private_free) (struct snd_pcm *pcm);
|
|
bool internal; /* pcm is for internal use only */
|
|
bool nonatomic; /* whole PCM operations are in non-atomic context */
|
|
bool no_device_suspend; /* don't invoke device PM suspend */
|
|
#if IS_ENABLED(CONFIG_SND_PCM_OSS)
|
|
struct snd_pcm_oss oss;
|
|
#endif
|
|
};
|
|
|
|
/*
|
|
* Registering
|
|
*/
|
|
|
|
extern const struct file_operations snd_pcm_f_ops[2];
|
|
|
|
int snd_pcm_new(struct snd_card *card, const char *id, int device,
|
|
int playback_count, int capture_count,
|
|
struct snd_pcm **rpcm);
|
|
int snd_pcm_new_internal(struct snd_card *card, const char *id, int device,
|
|
int playback_count, int capture_count,
|
|
struct snd_pcm **rpcm);
|
|
int snd_pcm_new_stream(struct snd_pcm *pcm, int stream, int substream_count);
|
|
|
|
#if IS_ENABLED(CONFIG_SND_PCM_OSS)
|
|
struct snd_pcm_notify {
|
|
int (*n_register) (struct snd_pcm * pcm);
|
|
int (*n_disconnect) (struct snd_pcm * pcm);
|
|
int (*n_unregister) (struct snd_pcm * pcm);
|
|
struct list_head list;
|
|
};
|
|
int snd_pcm_notify(struct snd_pcm_notify *notify, int nfree);
|
|
#endif
|
|
|
|
/*
|
|
* Native I/O
|
|
*/
|
|
|
|
int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info);
|
|
int snd_pcm_info_user(struct snd_pcm_substream *substream,
|
|
struct snd_pcm_info __user *info);
|
|
int snd_pcm_status64(struct snd_pcm_substream *substream,
|
|
struct snd_pcm_status64 *status);
|
|
int snd_pcm_start(struct snd_pcm_substream *substream);
|
|
int snd_pcm_stop(struct snd_pcm_substream *substream, snd_pcm_state_t status);
|
|
int snd_pcm_drain_done(struct snd_pcm_substream *substream);
|
|
int snd_pcm_stop_xrun(struct snd_pcm_substream *substream);
|
|
#ifdef CONFIG_PM
|
|
int snd_pcm_suspend_all(struct snd_pcm *pcm);
|
|
#else
|
|
static inline int snd_pcm_suspend_all(struct snd_pcm *pcm)
|
|
{
|
|
return 0;
|
|
}
|
|
#endif
|
|
int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream, unsigned int cmd, void *arg);
|
|
int snd_pcm_open_substream(struct snd_pcm *pcm, int stream, struct file *file,
|
|
struct snd_pcm_substream **rsubstream);
|
|
void snd_pcm_release_substream(struct snd_pcm_substream *substream);
|
|
int snd_pcm_attach_substream(struct snd_pcm *pcm, int stream, struct file *file,
|
|
struct snd_pcm_substream **rsubstream);
|
|
void snd_pcm_detach_substream(struct snd_pcm_substream *substream);
|
|
int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file, struct vm_area_struct *area);
|
|
|
|
|
|
#ifdef CONFIG_SND_DEBUG
|
|
void snd_pcm_debug_name(struct snd_pcm_substream *substream,
|
|
char *name, size_t len);
|
|
#else
|
|
static inline void
|
|
snd_pcm_debug_name(struct snd_pcm_substream *substream, char *buf, size_t size)
|
|
{
|
|
*buf = 0;
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* PCM library
|
|
*/
|
|
|
|
/**
|
|
* snd_pcm_stream_linked - Check whether the substream is linked with others
|
|
* @substream: substream to check
|
|
*
|
|
* Returns true if the given substream is being linked with others.
|
|
*/
|
|
static inline int snd_pcm_stream_linked(struct snd_pcm_substream *substream)
|
|
{
|
|
return substream->group != &substream->self_group;
|
|
}
|
|
|
|
void snd_pcm_stream_lock(struct snd_pcm_substream *substream);
|
|
void snd_pcm_stream_unlock(struct snd_pcm_substream *substream);
|
|
void snd_pcm_stream_lock_irq(struct snd_pcm_substream *substream);
|
|
void snd_pcm_stream_unlock_irq(struct snd_pcm_substream *substream);
|
|
unsigned long _snd_pcm_stream_lock_irqsave(struct snd_pcm_substream *substream);
|
|
|
|
/**
|
|
* snd_pcm_stream_lock_irqsave - Lock the PCM stream
|
|
* @substream: PCM substream
|
|
* @flags: irq flags
|
|
*
|
|
* This locks the PCM stream like snd_pcm_stream_lock() but with the local
|
|
* IRQ (only when nonatomic is false). In nonatomic case, this is identical
|
|
* as snd_pcm_stream_lock().
|
|
*/
|
|
#define snd_pcm_stream_lock_irqsave(substream, flags) \
|
|
do { \
|
|
typecheck(unsigned long, flags); \
|
|
flags = _snd_pcm_stream_lock_irqsave(substream); \
|
|
} while (0)
|
|
void snd_pcm_stream_unlock_irqrestore(struct snd_pcm_substream *substream,
|
|
unsigned long flags);
|
|
|
|
/**
|
|
* snd_pcm_group_for_each_entry - iterate over the linked substreams
|
|
* @s: the iterator
|
|
* @substream: the substream
|
|
*
|
|
* Iterate over the all linked substreams to the given @substream.
|
|
* When @substream isn't linked with any others, this gives returns @substream
|
|
* itself once.
|
|
*/
|
|
#define snd_pcm_group_for_each_entry(s, substream) \
|
|
list_for_each_entry(s, &substream->group->substreams, link_list)
|
|
|
|
#define for_each_pcm_streams(stream) \
|
|
for (stream = SNDRV_PCM_STREAM_PLAYBACK; \
|
|
stream <= SNDRV_PCM_STREAM_LAST; \
|
|
stream++)
|
|
|
|
/**
|
|
* snd_pcm_running - Check whether the substream is in a running state
|
|
* @substream: substream to check
|
|
*
|
|
* Returns true if the given substream is in the state RUNNING, or in the
|
|
* state DRAINING for playback.
|
|
*/
|
|
static inline int snd_pcm_running(struct snd_pcm_substream *substream)
|
|
{
|
|
return (substream->runtime->status->state == SNDRV_PCM_STATE_RUNNING ||
|
|
(substream->runtime->status->state == SNDRV_PCM_STATE_DRAINING &&
|
|
substream->stream == SNDRV_PCM_STREAM_PLAYBACK));
|
|
}
|
|
|
|
/**
|
|
* bytes_to_samples - Unit conversion of the size from bytes to samples
|
|
* @runtime: PCM runtime instance
|
|
* @size: size in bytes
|
|
*/
|
|
static inline ssize_t bytes_to_samples(struct snd_pcm_runtime *runtime, ssize_t size)
|
|
{
|
|
return size * 8 / runtime->sample_bits;
|
|
}
|
|
|
|
/**
|
|
* bytes_to_frames - Unit conversion of the size from bytes to frames
|
|
* @runtime: PCM runtime instance
|
|
* @size: size in bytes
|
|
*/
|
|
static inline snd_pcm_sframes_t bytes_to_frames(struct snd_pcm_runtime *runtime, ssize_t size)
|
|
{
|
|
return size * 8 / runtime->frame_bits;
|
|
}
|
|
|
|
/**
|
|
* samples_to_bytes - Unit conversion of the size from samples to bytes
|
|
* @runtime: PCM runtime instance
|
|
* @size: size in samples
|
|
*/
|
|
static inline ssize_t samples_to_bytes(struct snd_pcm_runtime *runtime, ssize_t size)
|
|
{
|
|
return size * runtime->sample_bits / 8;
|
|
}
|
|
|
|
/**
|
|
* frames_to_bytes - Unit conversion of the size from frames to bytes
|
|
* @runtime: PCM runtime instance
|
|
* @size: size in frames
|
|
*/
|
|
static inline ssize_t frames_to_bytes(struct snd_pcm_runtime *runtime, snd_pcm_sframes_t size)
|
|
{
|
|
return size * runtime->frame_bits / 8;
|
|
}
|
|
|
|
/**
|
|
* frame_aligned - Check whether the byte size is aligned to frames
|
|
* @runtime: PCM runtime instance
|
|
* @bytes: size in bytes
|
|
*/
|
|
static inline int frame_aligned(struct snd_pcm_runtime *runtime, ssize_t bytes)
|
|
{
|
|
return bytes % runtime->byte_align == 0;
|
|
}
|
|
|
|
/**
|
|
* snd_pcm_lib_buffer_bytes - Get the buffer size of the current PCM in bytes
|
|
* @substream: PCM substream
|
|
*/
|
|
static inline size_t snd_pcm_lib_buffer_bytes(struct snd_pcm_substream *substream)
|
|
{
|
|
struct snd_pcm_runtime *runtime = substream->runtime;
|
|
return frames_to_bytes(runtime, runtime->buffer_size);
|
|
}
|
|
|
|
/**
|
|
* snd_pcm_lib_period_bytes - Get the period size of the current PCM in bytes
|
|
* @substream: PCM substream
|
|
*/
|
|
static inline size_t snd_pcm_lib_period_bytes(struct snd_pcm_substream *substream)
|
|
{
|
|
struct snd_pcm_runtime *runtime = substream->runtime;
|
|
return frames_to_bytes(runtime, runtime->period_size);
|
|
}
|
|
|
|
/**
|
|
* snd_pcm_playback_avail - Get the available (writable) space for playback
|
|
* @runtime: PCM runtime instance
|
|
*
|
|
* Result is between 0 ... (boundary - 1)
|
|
*/
|
|
static inline snd_pcm_uframes_t snd_pcm_playback_avail(struct snd_pcm_runtime *runtime)
|
|
{
|
|
snd_pcm_sframes_t avail = runtime->status->hw_ptr + runtime->buffer_size - runtime->control->appl_ptr;
|
|
if (avail < 0)
|
|
avail += runtime->boundary;
|
|
else if ((snd_pcm_uframes_t) avail >= runtime->boundary)
|
|
avail -= runtime->boundary;
|
|
return avail;
|
|
}
|
|
|
|
/**
|
|
* snd_pcm_capture_avail - Get the available (readable) space for capture
|
|
* @runtime: PCM runtime instance
|
|
*
|
|
* Result is between 0 ... (boundary - 1)
|
|
*/
|
|
static inline snd_pcm_uframes_t snd_pcm_capture_avail(struct snd_pcm_runtime *runtime)
|
|
{
|
|
snd_pcm_sframes_t avail = runtime->status->hw_ptr - runtime->control->appl_ptr;
|
|
if (avail < 0)
|
|
avail += runtime->boundary;
|
|
return avail;
|
|
}
|
|
|
|
/**
|
|
* snd_pcm_playback_hw_avail - Get the queued space for playback
|
|
* @runtime: PCM runtime instance
|
|
*/
|
|
static inline snd_pcm_sframes_t snd_pcm_playback_hw_avail(struct snd_pcm_runtime *runtime)
|
|
{
|
|
return runtime->buffer_size - snd_pcm_playback_avail(runtime);
|
|
}
|
|
|
|
/**
|
|
* snd_pcm_capture_hw_avail - Get the free space for capture
|
|
* @runtime: PCM runtime instance
|
|
*/
|
|
static inline snd_pcm_sframes_t snd_pcm_capture_hw_avail(struct snd_pcm_runtime *runtime)
|
|
{
|
|
return runtime->buffer_size - snd_pcm_capture_avail(runtime);
|
|
}
|
|
|
|
/**
|
|
* snd_pcm_playback_ready - check whether the playback buffer is available
|
|
* @substream: the pcm substream instance
|
|
*
|
|
* Checks whether enough free space is available on the playback buffer.
|
|
*
|
|
* Return: Non-zero if available, or zero if not.
|
|
*/
|
|
static inline int snd_pcm_playback_ready(struct snd_pcm_substream *substream)
|
|
{
|
|
struct snd_pcm_runtime *runtime = substream->runtime;
|
|
return snd_pcm_playback_avail(runtime) >= runtime->control->avail_min;
|
|
}
|
|
|
|
/**
|
|
* snd_pcm_capture_ready - check whether the capture buffer is available
|
|
* @substream: the pcm substream instance
|
|
*
|
|
* Checks whether enough capture data is available on the capture buffer.
|
|
*
|
|
* Return: Non-zero if available, or zero if not.
|
|
*/
|
|
static inline int snd_pcm_capture_ready(struct snd_pcm_substream *substream)
|
|
{
|
|
struct snd_pcm_runtime *runtime = substream->runtime;
|
|
return snd_pcm_capture_avail(runtime) >= runtime->control->avail_min;
|
|
}
|
|
|
|
/**
|
|
* snd_pcm_playback_data - check whether any data exists on the playback buffer
|
|
* @substream: the pcm substream instance
|
|
*
|
|
* Checks whether any data exists on the playback buffer.
|
|
*
|
|
* Return: Non-zero if any data exists, or zero if not. If stop_threshold
|
|
* is bigger or equal to boundary, then this function returns always non-zero.
|
|
*/
|
|
static inline int snd_pcm_playback_data(struct snd_pcm_substream *substream)
|
|
{
|
|
struct snd_pcm_runtime *runtime = substream->runtime;
|
|
|
|
if (runtime->stop_threshold >= runtime->boundary)
|
|
return 1;
|
|
return snd_pcm_playback_avail(runtime) < runtime->buffer_size;
|
|
}
|
|
|
|
/**
|
|
* snd_pcm_playback_empty - check whether the playback buffer is empty
|
|
* @substream: the pcm substream instance
|
|
*
|
|
* Checks whether the playback buffer is empty.
|
|
*
|
|
* Return: Non-zero if empty, or zero if not.
|
|
*/
|
|
static inline int snd_pcm_playback_empty(struct snd_pcm_substream *substream)
|
|
{
|
|
struct snd_pcm_runtime *runtime = substream->runtime;
|
|
return snd_pcm_playback_avail(runtime) >= runtime->buffer_size;
|
|
}
|
|
|
|
/**
|
|
* snd_pcm_capture_empty - check whether the capture buffer is empty
|
|
* @substream: the pcm substream instance
|
|
*
|
|
* Checks whether the capture buffer is empty.
|
|
*
|
|
* Return: Non-zero if empty, or zero if not.
|
|
*/
|
|
static inline int snd_pcm_capture_empty(struct snd_pcm_substream *substream)
|
|
{
|
|
struct snd_pcm_runtime *runtime = substream->runtime;
|
|
return snd_pcm_capture_avail(runtime) == 0;
|
|
}
|
|
|
|
/**
|
|
* snd_pcm_trigger_done - Mark the master substream
|
|
* @substream: the pcm substream instance
|
|
* @master: the linked master substream
|
|
*
|
|
* When multiple substreams of the same card are linked and the hardware
|
|
* supports the single-shot operation, the driver calls this in the loop
|
|
* in snd_pcm_group_for_each_entry() for marking the substream as "done".
|
|
* Then most of trigger operations are performed only to the given master
|
|
* substream.
|
|
*
|
|
* The trigger_master mark is cleared at timestamp updates at the end
|
|
* of trigger operations.
|
|
*/
|
|
static inline void snd_pcm_trigger_done(struct snd_pcm_substream *substream,
|
|
struct snd_pcm_substream *master)
|
|
{
|
|
substream->runtime->trigger_master = master;
|
|
}
|
|
|
|
static inline int hw_is_mask(int var)
|
|
{
|
|
return var >= SNDRV_PCM_HW_PARAM_FIRST_MASK &&
|
|
var <= SNDRV_PCM_HW_PARAM_LAST_MASK;
|
|
}
|
|
|
|
static inline int hw_is_interval(int var)
|
|
{
|
|
return var >= SNDRV_PCM_HW_PARAM_FIRST_INTERVAL &&
|
|
var <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL;
|
|
}
|
|
|
|
static inline struct snd_mask *hw_param_mask(struct snd_pcm_hw_params *params,
|
|
snd_pcm_hw_param_t var)
|
|
{
|
|
return ¶ms->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK];
|
|
}
|
|
|
|
static inline struct snd_interval *hw_param_interval(struct snd_pcm_hw_params *params,
|
|
snd_pcm_hw_param_t var)
|
|
{
|
|
return ¶ms->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL];
|
|
}
|
|
|
|
static inline const struct snd_mask *hw_param_mask_c(const struct snd_pcm_hw_params *params,
|
|
snd_pcm_hw_param_t var)
|
|
{
|
|
return ¶ms->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK];
|
|
}
|
|
|
|
static inline const struct snd_interval *hw_param_interval_c(const struct snd_pcm_hw_params *params,
|
|
snd_pcm_hw_param_t var)
|
|
{
|
|
return ¶ms->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL];
|
|
}
|
|
|
|
/**
|
|
* params_channels - Get the number of channels from the hw params
|
|
* @p: hw params
|
|
*/
|
|
static inline unsigned int params_channels(const struct snd_pcm_hw_params *p)
|
|
{
|
|
return hw_param_interval_c(p, SNDRV_PCM_HW_PARAM_CHANNELS)->min;
|
|
}
|
|
|
|
/**
|
|
* params_rate - Get the sample rate from the hw params
|
|
* @p: hw params
|
|
*/
|
|
static inline unsigned int params_rate(const struct snd_pcm_hw_params *p)
|
|
{
|
|
return hw_param_interval_c(p, SNDRV_PCM_HW_PARAM_RATE)->min;
|
|
}
|
|
|
|
/**
|
|
* params_period_size - Get the period size (in frames) from the hw params
|
|
* @p: hw params
|
|
*/
|
|
static inline unsigned int params_period_size(const struct snd_pcm_hw_params *p)
|
|
{
|
|
return hw_param_interval_c(p, SNDRV_PCM_HW_PARAM_PERIOD_SIZE)->min;
|
|
}
|
|
|
|
/**
|
|
* params_periods - Get the number of periods from the hw params
|
|
* @p: hw params
|
|
*/
|
|
static inline unsigned int params_periods(const struct snd_pcm_hw_params *p)
|
|
{
|
|
return hw_param_interval_c(p, SNDRV_PCM_HW_PARAM_PERIODS)->min;
|
|
}
|
|
|
|
/**
|
|
* params_buffer_size - Get the buffer size (in frames) from the hw params
|
|
* @p: hw params
|
|
*/
|
|
static inline unsigned int params_buffer_size(const struct snd_pcm_hw_params *p)
|
|
{
|
|
return hw_param_interval_c(p, SNDRV_PCM_HW_PARAM_BUFFER_SIZE)->min;
|
|
}
|
|
|
|
/**
|
|
* params_buffer_bytes - Get the buffer size (in bytes) from the hw params
|
|
* @p: hw params
|
|
*/
|
|
static inline unsigned int params_buffer_bytes(const struct snd_pcm_hw_params *p)
|
|
{
|
|
return hw_param_interval_c(p, SNDRV_PCM_HW_PARAM_BUFFER_BYTES)->min;
|
|
}
|
|
|
|
int snd_interval_refine(struct snd_interval *i, const struct snd_interval *v);
|
|
int snd_interval_list(struct snd_interval *i, unsigned int count,
|
|
const unsigned int *list, unsigned int mask);
|
|
int snd_interval_ranges(struct snd_interval *i, unsigned int count,
|
|
const struct snd_interval *list, unsigned int mask);
|
|
int snd_interval_ratnum(struct snd_interval *i,
|
|
unsigned int rats_count, const struct snd_ratnum *rats,
|
|
unsigned int *nump, unsigned int *denp);
|
|
|
|
void _snd_pcm_hw_params_any(struct snd_pcm_hw_params *params);
|
|
void _snd_pcm_hw_param_setempty(struct snd_pcm_hw_params *params, snd_pcm_hw_param_t var);
|
|
|
|
int snd_pcm_hw_refine(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params);
|
|
|
|
int snd_pcm_hw_constraint_mask64(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var,
|
|
u_int64_t mask);
|
|
int snd_pcm_hw_constraint_minmax(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var,
|
|
unsigned int min, unsigned int max);
|
|
int snd_pcm_hw_constraint_integer(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var);
|
|
int snd_pcm_hw_constraint_list(struct snd_pcm_runtime *runtime,
|
|
unsigned int cond,
|
|
snd_pcm_hw_param_t var,
|
|
const struct snd_pcm_hw_constraint_list *l);
|
|
int snd_pcm_hw_constraint_ranges(struct snd_pcm_runtime *runtime,
|
|
unsigned int cond,
|
|
snd_pcm_hw_param_t var,
|
|
const struct snd_pcm_hw_constraint_ranges *r);
|
|
int snd_pcm_hw_constraint_ratnums(struct snd_pcm_runtime *runtime,
|
|
unsigned int cond,
|
|
snd_pcm_hw_param_t var,
|
|
const struct snd_pcm_hw_constraint_ratnums *r);
|
|
int snd_pcm_hw_constraint_ratdens(struct snd_pcm_runtime *runtime,
|
|
unsigned int cond,
|
|
snd_pcm_hw_param_t var,
|
|
const struct snd_pcm_hw_constraint_ratdens *r);
|
|
int snd_pcm_hw_constraint_msbits(struct snd_pcm_runtime *runtime,
|
|
unsigned int cond,
|
|
unsigned int width,
|
|
unsigned int msbits);
|
|
int snd_pcm_hw_constraint_step(struct snd_pcm_runtime *runtime,
|
|
unsigned int cond,
|
|
snd_pcm_hw_param_t var,
|
|
unsigned long step);
|
|
int snd_pcm_hw_constraint_pow2(struct snd_pcm_runtime *runtime,
|
|
unsigned int cond,
|
|
snd_pcm_hw_param_t var);
|
|
int snd_pcm_hw_rule_noresample(struct snd_pcm_runtime *runtime,
|
|
unsigned int base_rate);
|
|
int snd_pcm_hw_rule_add(struct snd_pcm_runtime *runtime,
|
|
unsigned int cond,
|
|
int var,
|
|
snd_pcm_hw_rule_func_t func, void *private,
|
|
int dep, ...);
|
|
|
|
/**
|
|
* snd_pcm_hw_constraint_single() - Constrain parameter to a single value
|
|
* @runtime: PCM runtime instance
|
|
* @var: The hw_params variable to constrain
|
|
* @val: The value to constrain to
|
|
*
|
|
* Return: Positive if the value is changed, zero if it's not changed, or a
|
|
* negative error code.
|
|
*/
|
|
static inline int snd_pcm_hw_constraint_single(
|
|
struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var,
|
|
unsigned int val)
|
|
{
|
|
return snd_pcm_hw_constraint_minmax(runtime, var, val, val);
|
|
}
|
|
|
|
int snd_pcm_format_signed(snd_pcm_format_t format);
|
|
int snd_pcm_format_unsigned(snd_pcm_format_t format);
|
|
int snd_pcm_format_linear(snd_pcm_format_t format);
|
|
int snd_pcm_format_little_endian(snd_pcm_format_t format);
|
|
int snd_pcm_format_big_endian(snd_pcm_format_t format);
|
|
#if 0 /* just for kernel-doc */
|
|
/**
|
|
* snd_pcm_format_cpu_endian - Check the PCM format is CPU-endian
|
|
* @format: the format to check
|
|
*
|
|
* Return: 1 if the given PCM format is CPU-endian, 0 if
|
|
* opposite, or a negative error code if endian not specified.
|
|
*/
|
|
int snd_pcm_format_cpu_endian(snd_pcm_format_t format);
|
|
#endif /* DocBook */
|
|
#ifdef SNDRV_LITTLE_ENDIAN
|
|
#define snd_pcm_format_cpu_endian(format) snd_pcm_format_little_endian(format)
|
|
#else
|
|
#define snd_pcm_format_cpu_endian(format) snd_pcm_format_big_endian(format)
|
|
#endif
|
|
int snd_pcm_format_width(snd_pcm_format_t format); /* in bits */
|
|
int snd_pcm_format_physical_width(snd_pcm_format_t format); /* in bits */
|
|
ssize_t snd_pcm_format_size(snd_pcm_format_t format, size_t samples);
|
|
const unsigned char *snd_pcm_format_silence_64(snd_pcm_format_t format);
|
|
int snd_pcm_format_set_silence(snd_pcm_format_t format, void *buf, unsigned int frames);
|
|
|
|
void snd_pcm_set_ops(struct snd_pcm * pcm, int direction,
|
|
const struct snd_pcm_ops *ops);
|
|
void snd_pcm_set_sync(struct snd_pcm_substream *substream);
|
|
int snd_pcm_lib_ioctl(struct snd_pcm_substream *substream,
|
|
unsigned int cmd, void *arg);
|
|
void snd_pcm_period_elapsed(struct snd_pcm_substream *substream);
|
|
snd_pcm_sframes_t __snd_pcm_lib_xfer(struct snd_pcm_substream *substream,
|
|
void *buf, bool interleaved,
|
|
snd_pcm_uframes_t frames, bool in_kernel);
|
|
|
|
static inline snd_pcm_sframes_t
|
|
snd_pcm_lib_write(struct snd_pcm_substream *substream,
|
|
const void __user *buf, snd_pcm_uframes_t frames)
|
|
{
|
|
return __snd_pcm_lib_xfer(substream, (void __force *)buf, true, frames, false);
|
|
}
|
|
|
|
static inline snd_pcm_sframes_t
|
|
snd_pcm_lib_read(struct snd_pcm_substream *substream,
|
|
void __user *buf, snd_pcm_uframes_t frames)
|
|
{
|
|
return __snd_pcm_lib_xfer(substream, (void __force *)buf, true, frames, false);
|
|
}
|
|
|
|
static inline snd_pcm_sframes_t
|
|
snd_pcm_lib_writev(struct snd_pcm_substream *substream,
|
|
void __user **bufs, snd_pcm_uframes_t frames)
|
|
{
|
|
return __snd_pcm_lib_xfer(substream, (void *)bufs, false, frames, false);
|
|
}
|
|
|
|
static inline snd_pcm_sframes_t
|
|
snd_pcm_lib_readv(struct snd_pcm_substream *substream,
|
|
void __user **bufs, snd_pcm_uframes_t frames)
|
|
{
|
|
return __snd_pcm_lib_xfer(substream, (void *)bufs, false, frames, false);
|
|
}
|
|
|
|
static inline snd_pcm_sframes_t
|
|
snd_pcm_kernel_write(struct snd_pcm_substream *substream,
|
|
const void *buf, snd_pcm_uframes_t frames)
|
|
{
|
|
return __snd_pcm_lib_xfer(substream, (void *)buf, true, frames, true);
|
|
}
|
|
|
|
static inline snd_pcm_sframes_t
|
|
snd_pcm_kernel_read(struct snd_pcm_substream *substream,
|
|
void *buf, snd_pcm_uframes_t frames)
|
|
{
|
|
return __snd_pcm_lib_xfer(substream, buf, true, frames, true);
|
|
}
|
|
|
|
static inline snd_pcm_sframes_t
|
|
snd_pcm_kernel_writev(struct snd_pcm_substream *substream,
|
|
void **bufs, snd_pcm_uframes_t frames)
|
|
{
|
|
return __snd_pcm_lib_xfer(substream, bufs, false, frames, true);
|
|
}
|
|
|
|
static inline snd_pcm_sframes_t
|
|
snd_pcm_kernel_readv(struct snd_pcm_substream *substream,
|
|
void **bufs, snd_pcm_uframes_t frames)
|
|
{
|
|
return __snd_pcm_lib_xfer(substream, bufs, false, frames, true);
|
|
}
|
|
|
|
int snd_pcm_hw_limit_rates(struct snd_pcm_hardware *hw);
|
|
|
|
static inline int
|
|
snd_pcm_limit_hw_rates(struct snd_pcm_runtime *runtime)
|
|
{
|
|
return snd_pcm_hw_limit_rates(&runtime->hw);
|
|
}
|
|
|
|
unsigned int snd_pcm_rate_to_rate_bit(unsigned int rate);
|
|
unsigned int snd_pcm_rate_bit_to_rate(unsigned int rate_bit);
|
|
unsigned int snd_pcm_rate_mask_intersect(unsigned int rates_a,
|
|
unsigned int rates_b);
|
|
unsigned int snd_pcm_rate_range_to_bits(unsigned int rate_min,
|
|
unsigned int rate_max);
|
|
|
|
/**
|
|
* snd_pcm_set_runtime_buffer - Set the PCM runtime buffer
|
|
* @substream: PCM substream to set
|
|
* @bufp: the buffer information, NULL to clear
|
|
*
|
|
* Copy the buffer information to runtime->dma_buffer when @bufp is non-NULL.
|
|
* Otherwise it clears the current buffer information.
|
|
*/
|
|
static inline void snd_pcm_set_runtime_buffer(struct snd_pcm_substream *substream,
|
|
struct snd_dma_buffer *bufp)
|
|
{
|
|
struct snd_pcm_runtime *runtime = substream->runtime;
|
|
if (bufp) {
|
|
runtime->dma_buffer_p = bufp;
|
|
runtime->dma_area = bufp->area;
|
|
runtime->dma_addr = bufp->addr;
|
|
runtime->dma_bytes = bufp->bytes;
|
|
} else {
|
|
runtime->dma_buffer_p = NULL;
|
|
runtime->dma_area = NULL;
|
|
runtime->dma_addr = 0;
|
|
runtime->dma_bytes = 0;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* snd_pcm_gettime - Fill the timespec64 depending on the timestamp mode
|
|
* @runtime: PCM runtime instance
|
|
* @tv: timespec64 to fill
|
|
*/
|
|
static inline void snd_pcm_gettime(struct snd_pcm_runtime *runtime,
|
|
struct timespec64 *tv)
|
|
{
|
|
switch (runtime->tstamp_type) {
|
|
case SNDRV_PCM_TSTAMP_TYPE_MONOTONIC:
|
|
ktime_get_ts64(tv);
|
|
break;
|
|
case SNDRV_PCM_TSTAMP_TYPE_MONOTONIC_RAW:
|
|
ktime_get_raw_ts64(tv);
|
|
break;
|
|
default:
|
|
ktime_get_real_ts64(tv);
|
|
break;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Memory
|
|
*/
|
|
|
|
void snd_pcm_lib_preallocate_free(struct snd_pcm_substream *substream);
|
|
void snd_pcm_lib_preallocate_free_for_all(struct snd_pcm *pcm);
|
|
void snd_pcm_lib_preallocate_pages(struct snd_pcm_substream *substream,
|
|
int type, struct device *data,
|
|
size_t size, size_t max);
|
|
void snd_pcm_lib_preallocate_pages_for_all(struct snd_pcm *pcm,
|
|
int type, void *data,
|
|
size_t size, size_t max);
|
|
int snd_pcm_lib_malloc_pages(struct snd_pcm_substream *substream, size_t size);
|
|
int snd_pcm_lib_free_pages(struct snd_pcm_substream *substream);
|
|
|
|
void snd_pcm_set_managed_buffer(struct snd_pcm_substream *substream, int type,
|
|
struct device *data, size_t size, size_t max);
|
|
void snd_pcm_set_managed_buffer_all(struct snd_pcm *pcm, int type,
|
|
struct device *data,
|
|
size_t size, size_t max);
|
|
|
|
int _snd_pcm_lib_alloc_vmalloc_buffer(struct snd_pcm_substream *substream,
|
|
size_t size, gfp_t gfp_flags);
|
|
int snd_pcm_lib_free_vmalloc_buffer(struct snd_pcm_substream *substream);
|
|
struct page *snd_pcm_lib_get_vmalloc_page(struct snd_pcm_substream *substream,
|
|
unsigned long offset);
|
|
/**
|
|
* snd_pcm_lib_alloc_vmalloc_buffer - allocate virtual DMA buffer
|
|
* @substream: the substream to allocate the buffer to
|
|
* @size: the requested buffer size, in bytes
|
|
*
|
|
* Allocates the PCM substream buffer using vmalloc(), i.e., the memory is
|
|
* contiguous in kernel virtual space, but not in physical memory. Use this
|
|
* if the buffer is accessed by kernel code but not by device DMA.
|
|
*
|
|
* Return: 1 if the buffer was changed, 0 if not changed, or a negative error
|
|
* code.
|
|
*/
|
|
static inline int snd_pcm_lib_alloc_vmalloc_buffer
|
|
(struct snd_pcm_substream *substream, size_t size)
|
|
{
|
|
return _snd_pcm_lib_alloc_vmalloc_buffer(substream, size,
|
|
GFP_KERNEL | __GFP_HIGHMEM | __GFP_ZERO);
|
|
}
|
|
|
|
/**
|
|
* snd_pcm_lib_alloc_vmalloc_32_buffer - allocate 32-bit-addressable buffer
|
|
* @substream: the substream to allocate the buffer to
|
|
* @size: the requested buffer size, in bytes
|
|
*
|
|
* This function works like snd_pcm_lib_alloc_vmalloc_buffer(), but uses
|
|
* vmalloc_32(), i.e., the pages are allocated from 32-bit-addressable memory.
|
|
*
|
|
* Return: 1 if the buffer was changed, 0 if not changed, or a negative error
|
|
* code.
|
|
*/
|
|
static inline int snd_pcm_lib_alloc_vmalloc_32_buffer
|
|
(struct snd_pcm_substream *substream, size_t size)
|
|
{
|
|
return _snd_pcm_lib_alloc_vmalloc_buffer(substream, size,
|
|
GFP_KERNEL | GFP_DMA32 | __GFP_ZERO);
|
|
}
|
|
|
|
#define snd_pcm_get_dma_buf(substream) ((substream)->runtime->dma_buffer_p)
|
|
|
|
#ifdef CONFIG_SND_DMA_SGBUF
|
|
/*
|
|
* SG-buffer handling
|
|
*/
|
|
#define snd_pcm_substream_sgbuf(substream) \
|
|
snd_pcm_get_dma_buf(substream)->private_data
|
|
#endif /* SND_DMA_SGBUF */
|
|
|
|
/**
|
|
* snd_pcm_sgbuf_get_addr - Get the DMA address at the corresponding offset
|
|
* @substream: PCM substream
|
|
* @ofs: byte offset
|
|
*/
|
|
static inline dma_addr_t
|
|
snd_pcm_sgbuf_get_addr(struct snd_pcm_substream *substream, unsigned int ofs)
|
|
{
|
|
return snd_sgbuf_get_addr(snd_pcm_get_dma_buf(substream), ofs);
|
|
}
|
|
|
|
/**
|
|
* snd_pcm_sgbuf_get_ptr - Get the virtual address at the corresponding offset
|
|
* @substream: PCM substream
|
|
* @ofs: byte offset
|
|
*/
|
|
static inline void *
|
|
snd_pcm_sgbuf_get_ptr(struct snd_pcm_substream *substream, unsigned int ofs)
|
|
{
|
|
return snd_sgbuf_get_ptr(snd_pcm_get_dma_buf(substream), ofs);
|
|
}
|
|
|
|
/**
|
|
* snd_pcm_sgbuf_get_chunk_size - Compute the max size that fits within the
|
|
* contig. page from the given size
|
|
* @substream: PCM substream
|
|
* @ofs: byte offset
|
|
* @size: byte size to examine
|
|
*/
|
|
static inline unsigned int
|
|
snd_pcm_sgbuf_get_chunk_size(struct snd_pcm_substream *substream,
|
|
unsigned int ofs, unsigned int size)
|
|
{
|
|
return snd_sgbuf_get_chunk_size(snd_pcm_get_dma_buf(substream), ofs, size);
|
|
}
|
|
|
|
/**
|
|
* snd_pcm_mmap_data_open - increase the mmap counter
|
|
* @area: VMA
|
|
*
|
|
* PCM mmap callback should handle this counter properly
|
|
*/
|
|
static inline void snd_pcm_mmap_data_open(struct vm_area_struct *area)
|
|
{
|
|
struct snd_pcm_substream *substream = (struct snd_pcm_substream *)area->vm_private_data;
|
|
atomic_inc(&substream->mmap_count);
|
|
}
|
|
|
|
/**
|
|
* snd_pcm_mmap_data_close - decrease the mmap counter
|
|
* @area: VMA
|
|
*
|
|
* PCM mmap callback should handle this counter properly
|
|
*/
|
|
static inline void snd_pcm_mmap_data_close(struct vm_area_struct *area)
|
|
{
|
|
struct snd_pcm_substream *substream = (struct snd_pcm_substream *)area->vm_private_data;
|
|
atomic_dec(&substream->mmap_count);
|
|
}
|
|
|
|
int snd_pcm_lib_default_mmap(struct snd_pcm_substream *substream,
|
|
struct vm_area_struct *area);
|
|
/* mmap for io-memory area */
|
|
#if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA)
|
|
#define SNDRV_PCM_INFO_MMAP_IOMEM SNDRV_PCM_INFO_MMAP
|
|
int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream, struct vm_area_struct *area);
|
|
#else
|
|
#define SNDRV_PCM_INFO_MMAP_IOMEM 0
|
|
#define snd_pcm_lib_mmap_iomem NULL
|
|
#endif
|
|
|
|
/**
|
|
* snd_pcm_limit_isa_dma_size - Get the max size fitting with ISA DMA transfer
|
|
* @dma: DMA number
|
|
* @max: pointer to store the max size
|
|
*/
|
|
static inline void snd_pcm_limit_isa_dma_size(int dma, size_t *max)
|
|
{
|
|
*max = dma < 4 ? 64 * 1024 : 128 * 1024;
|
|
}
|
|
|
|
/*
|
|
* Misc
|
|
*/
|
|
|
|
#define SNDRV_PCM_DEFAULT_CON_SPDIF (IEC958_AES0_CON_EMPHASIS_NONE|\
|
|
(IEC958_AES1_CON_ORIGINAL<<8)|\
|
|
(IEC958_AES1_CON_PCM_CODER<<8)|\
|
|
(IEC958_AES3_CON_FS_48000<<24))
|
|
|
|
const char *snd_pcm_format_name(snd_pcm_format_t format);
|
|
|
|
/**
|
|
* snd_pcm_stream_str - Get a string naming the direction of a stream
|
|
* @substream: the pcm substream instance
|
|
*
|
|
* Return: A string naming the direction of the stream.
|
|
*/
|
|
static inline const char *snd_pcm_stream_str(struct snd_pcm_substream *substream)
|
|
{
|
|
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
|
|
return "Playback";
|
|
else
|
|
return "Capture";
|
|
}
|
|
|
|
/*
|
|
* PCM channel-mapping control API
|
|
*/
|
|
/* array element of channel maps */
|
|
struct snd_pcm_chmap_elem {
|
|
unsigned char channels;
|
|
unsigned char map[15];
|
|
};
|
|
|
|
/* channel map information; retrieved via snd_kcontrol_chip() */
|
|
struct snd_pcm_chmap {
|
|
struct snd_pcm *pcm; /* assigned PCM instance */
|
|
int stream; /* PLAYBACK or CAPTURE */
|
|
struct snd_kcontrol *kctl;
|
|
const struct snd_pcm_chmap_elem *chmap;
|
|
unsigned int max_channels;
|
|
unsigned int channel_mask; /* optional: active channels bitmask */
|
|
void *private_data; /* optional: private data pointer */
|
|
};
|
|
|
|
/**
|
|
* snd_pcm_chmap_substream - get the PCM substream assigned to the given chmap info
|
|
* @info: chmap information
|
|
* @idx: the substream number index
|
|
*/
|
|
static inline struct snd_pcm_substream *
|
|
snd_pcm_chmap_substream(struct snd_pcm_chmap *info, unsigned int idx)
|
|
{
|
|
struct snd_pcm_substream *s;
|
|
for (s = info->pcm->streams[info->stream].substream; s; s = s->next)
|
|
if (s->number == idx)
|
|
return s;
|
|
return NULL;
|
|
}
|
|
|
|
/* ALSA-standard channel maps (RL/RR prior to C/LFE) */
|
|
extern const struct snd_pcm_chmap_elem snd_pcm_std_chmaps[];
|
|
/* Other world's standard channel maps (C/LFE prior to RL/RR) */
|
|
extern const struct snd_pcm_chmap_elem snd_pcm_alt_chmaps[];
|
|
|
|
/* bit masks to be passed to snd_pcm_chmap.channel_mask field */
|
|
#define SND_PCM_CHMAP_MASK_24 ((1U << 2) | (1U << 4))
|
|
#define SND_PCM_CHMAP_MASK_246 (SND_PCM_CHMAP_MASK_24 | (1U << 6))
|
|
#define SND_PCM_CHMAP_MASK_2468 (SND_PCM_CHMAP_MASK_246 | (1U << 8))
|
|
|
|
int snd_pcm_add_chmap_ctls(struct snd_pcm *pcm, int stream,
|
|
const struct snd_pcm_chmap_elem *chmap,
|
|
int max_channels,
|
|
unsigned long private_value,
|
|
struct snd_pcm_chmap **info_ret);
|
|
|
|
/**
|
|
* pcm_format_to_bits - Strong-typed conversion of pcm_format to bitwise
|
|
* @pcm_format: PCM format
|
|
*/
|
|
static inline u64 pcm_format_to_bits(snd_pcm_format_t pcm_format)
|
|
{
|
|
return 1ULL << (__force int) pcm_format;
|
|
}
|
|
|
|
/**
|
|
* pcm_for_each_format - helper to iterate for each format type
|
|
* @f: the iterator variable in snd_pcm_format_t type
|
|
*/
|
|
#define pcm_for_each_format(f) \
|
|
for ((f) = SNDRV_PCM_FORMAT_FIRST; \
|
|
(__force int)(f) <= (__force int)SNDRV_PCM_FORMAT_LAST; \
|
|
(f) = (__force snd_pcm_format_t)((__force int)(f) + 1))
|
|
|
|
/* printk helpers */
|
|
#define pcm_err(pcm, fmt, args...) \
|
|
dev_err((pcm)->card->dev, fmt, ##args)
|
|
#define pcm_warn(pcm, fmt, args...) \
|
|
dev_warn((pcm)->card->dev, fmt, ##args)
|
|
#define pcm_dbg(pcm, fmt, args...) \
|
|
dev_dbg((pcm)->card->dev, fmt, ##args)
|
|
|
|
struct snd_pcm_status64 {
|
|
snd_pcm_state_t state; /* stream state */
|
|
u8 rsvd[4];
|
|
s64 trigger_tstamp_sec; /* time when stream was started/stopped/paused */
|
|
s64 trigger_tstamp_nsec;
|
|
s64 tstamp_sec; /* reference timestamp */
|
|
s64 tstamp_nsec;
|
|
snd_pcm_uframes_t appl_ptr; /* appl ptr */
|
|
snd_pcm_uframes_t hw_ptr; /* hw ptr */
|
|
snd_pcm_sframes_t delay; /* current delay in frames */
|
|
snd_pcm_uframes_t avail; /* number of frames available */
|
|
snd_pcm_uframes_t avail_max; /* max frames available on hw since last status */
|
|
snd_pcm_uframes_t overrange; /* count of ADC (capture) overrange detections from last status */
|
|
snd_pcm_state_t suspended_state; /* suspended stream state */
|
|
__u32 audio_tstamp_data; /* needed for 64-bit alignment, used for configs/report to/from userspace */
|
|
s64 audio_tstamp_sec; /* sample counter, wall clock, PHC or on-demand sync'ed */
|
|
s64 audio_tstamp_nsec;
|
|
s64 driver_tstamp_sec; /* useful in case reference system tstamp is reported with delay */
|
|
s64 driver_tstamp_nsec;
|
|
__u32 audio_tstamp_accuracy; /* in ns units, only valid if indicated in audio_tstamp_data */
|
|
unsigned char reserved[52-4*sizeof(s64)]; /* must be filled with zero */
|
|
};
|
|
|
|
#define SNDRV_PCM_IOCTL_STATUS64 _IOR('A', 0x20, struct snd_pcm_status64)
|
|
#define SNDRV_PCM_IOCTL_STATUS_EXT64 _IOWR('A', 0x24, struct snd_pcm_status64)
|
|
|
|
struct snd_pcm_status32 {
|
|
snd_pcm_state_t state; /* stream state */
|
|
s32 trigger_tstamp_sec; /* time when stream was started/stopped/paused */
|
|
s32 trigger_tstamp_nsec;
|
|
s32 tstamp_sec; /* reference timestamp */
|
|
s32 tstamp_nsec;
|
|
u32 appl_ptr; /* appl ptr */
|
|
u32 hw_ptr; /* hw ptr */
|
|
s32 delay; /* current delay in frames */
|
|
u32 avail; /* number of frames available */
|
|
u32 avail_max; /* max frames available on hw since last status */
|
|
u32 overrange; /* count of ADC (capture) overrange detections from last status */
|
|
snd_pcm_state_t suspended_state; /* suspended stream state */
|
|
u32 audio_tstamp_data; /* needed for 64-bit alignment, used for configs/report to/from userspace */
|
|
s32 audio_tstamp_sec; /* sample counter, wall clock, PHC or on-demand sync'ed */
|
|
s32 audio_tstamp_nsec;
|
|
s32 driver_tstamp_sec; /* useful in case reference system tstamp is reported with delay */
|
|
s32 driver_tstamp_nsec;
|
|
u32 audio_tstamp_accuracy; /* in ns units, only valid if indicated in audio_tstamp_data */
|
|
unsigned char reserved[52-4*sizeof(s32)]; /* must be filled with zero */
|
|
};
|
|
|
|
#define SNDRV_PCM_IOCTL_STATUS32 _IOR('A', 0x20, struct snd_pcm_status32)
|
|
#define SNDRV_PCM_IOCTL_STATUS_EXT32 _IOWR('A', 0x24, struct snd_pcm_status32)
|
|
|
|
#endif /* __SOUND_PCM_H */
|