main.cpp File Reference

#include <aurora.h>
#include <Drivers/uart.h>
#include <aucon.h>
#include <stdint.h>
#include <pcie.h>
#include <Hal/AA64/aa64lowlevel.h>
#include <Mm/vmmngr.h>
#include <audrv.h>
#include <Drivers/virtio.h>
#include <Mm/pmmngr.h>
#include <Hal/AA64/gic.h>
#include <string.h>
#include <_null.h>
#include <Sound/sound.h>
#include <Mm/kmalloc.h>

Include dependency graph for main.cpp:

Classes
struct	virtio_snd_config
struct	virtio_snd_hdr
struct	virtio_snd_info
struct	_virtio_snd_query_info_
struct	virtio_snd_event
struct	virtio_snd_jack_info
struct	virtio_snd_pcm_hdr
struct	virtio_snd_pcm_info
struct	virtio_snd_pcm_set_params
struct	_snd_xfer_
struct	virtio_snd_pcm_status

Macros
#define	VIRTIO_F_VERSION_1   (1ull << 32)
#define	VIRTIO_PCI_CAP_ID   0x09
#define	VIRTIO_PCI_CAP_COMMON_CFG   1
#define	VIRTIO_PCI_CAP_DEVICE_CFG   4
#define	VIRTQ_DESC_F_NEXT   1
#define	VIRTQ_DESC_F_WRITE   2
#define	VIRTIO_PCM_PERIOD   2048
#define	VIRTIO_PCM_BUFFER   (VIRTIO_PCM_PERIOD * 4)

Typedefs
typedef struct _virtio_snd_query_info_	virtio_snd_query_info
typedef struct _snd_xfer_	virtio_snd_pcm_xfer

Enumerations
enum	{   VIRTIO_SND_R_JACK_INFO = 1 , VIRTIO_SND_R_JACK_REMAP , VIRTIO_SND_R_PCM_INFO = 0x0100 , VIRTIO_SND_R_PCM_SET_PARAMS ,   VIRTIO_SND_R_PCM_PREPARE , VIRTIO_SND_R_PCM_RELEASE , VIRTIO_SND_R_PCM_START , VIRTIO_SND_R_PCM_STOP ,   VIRTIO_SND_R_CHMAP_INFO = 0x0200 , VIRTIO_SND_R_PCM_XFER = 0x1000 , VIRTIO_SND_R_CTL_INFO = 0x0300 , VIRTIO_SND_R_CTL_ENUM_ITEMS ,   VIRTIO_SND_R_CTL_READ , VIRTIO_SND_R_CTL_WRITE , VIRTIO_SND_R_CTL_TLV_READ , VIRTIO_SND_R_CTL_TLV_WRITE ,   VIRTIO_SND_R_CTL_TLV_COMMAND , VIRTIO_SND_EVT_JACK_CONNECTED = 0x1000 , VIRTIO_SND_EVT_JACK_DISCONNECTED , VIRTIO_SND_EVT_PCM_PERIOD_ELAPSED = 0x1100 ,   VIRTIO_SND_EVT_PCM_XRUN , VIRTIO_SND_EVT_CTL_NOTIFY = 0x1200 , VIRTIO_SND_S_OK = 0x8000 , VIRTIO_SND_S_BAD_MSG ,   VIRTIO_SND_S_NOT_SUPP , VIRTIO_SND_S_IO_ERR }
enum	{   VIRTIO_SND_PCM_F_SHMEM_HOST = 0 , VIRTIO_SND_PCM_F_SHMEM_GUEST , VIRTIO_SND_PCM_F_MSG_POLLING , VIRTIO_SND_PCM_F_EVT_SHMEM_PERIODS ,   VIRTIO_SND_PCM_F_EVT_XRUNS }
enum	{   VIRTIO_SND_PCM_FMT_IMA_ADPCM = 0 , VIRTIO_SND_PCM_FMT_MU_LAW , VIRTIO_SND_PCM_FMT_A_LAW , VIRTIO_SND_PCM_FMT_S8 ,   VIRTIO_SND_PCM_FMT_U8 , VIRTIO_SND_PCM_FMT_S16 , VIRTIO_SND_PCM_FMT_U16 , VIRTIO_SND_PCM_FMT_S18_3 ,   VIRTIO_SND_PCM_FMT_U18_3 , VIRTIO_SND_PCM_FMT_S20_3 , VIRTIO_SND_PCM_FMT_U20_3 , VIRTIO_SND_PCM_FMT_S24_3 ,   VIRTIO_SND_PCM_FMT_U24_3 , VIRTIO_SND_PCM_FMT_S20 , VIRTIO_SND_PCM_FMT_U20 , VIRTIO_SND_PCM_FMT_S24 ,   VIRTIO_SND_PCM_FMT_U24 , VIRTIO_SND_PCM_FMT_S32 , VIRTIO_SND_PCM_FMT_U32 , VIRTIO_SND_PCM_FMT_FLOAT ,   VIRTIO_SND_PCM_FMT_FLOAT64 , VIRTIO_SND_PCM_FMT_DSD_U8 , VIRTIO_SND_PCM_FMT_DSD_U16 , VIRTIO_SND_PCM_FMT_DSD_U32 ,   VIRTIO_SND_PCM_FMT_IEC958_SUBFRAME }
enum	{   VIRTIO_SND_PCM_RATE_5512 = 0 , VIRTIO_SND_PCM_RATE_8000 , VIRTIO_SND_PCM_RATE_11025 , VIRTIO_SND_PCM_RATE_16000 ,   VIRTIO_SND_PCM_RATE_22050 , VIRTIO_SND_PCM_RATE_32000 , VIRTIO_SND_PCM_RATE_44100 , VIRTIO_SND_PCM_RATE_48000 ,   VIRTIO_SND_PCM_RATE_64000 , VIRTIO_SND_PCM_RATE_88200 , VIRTIO_SND_PCM_RATE_96000 , VIRTIO_SND_PCM_RATE_176400 ,   VIRTIO_SND_PCM_RATE_192000 , VIRTIO_SND_PCM_RATE_384000 }

Functions
	AU_DRIVER_FLAGS (AU_DRV_FLAG_UNLOADABLE)
AU_EXTERN AU_EXPORT int	AuDriverUnload ()
int	virtio_snd_write (uint8_t *buffer, size_t len)
int	virtio_snd_read (uint8_t *buffer, size_t len)
int	virtio_snd_output_stop ()
int	virtio_snd_output_start ()
int	virtio_snd_set_vol (uint8_t vol)
AU_EXTERN AU_EXPORT int	AuDriverMain (AuDriver *drv)

Macro Definition Documentation

VIRTIO_F_VERSION_1

#define VIRTIO_F_VERSION_1   (1ull << 32)

BSD 2-Clause License

Copyright (c) 2022-2026, Manas Kamal Choudhury All rights reserved.

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

VIRTIO_PCI_CAP_COMMON_CFG

#define VIRTIO_PCI_CAP_COMMON_CFG   1

VIRTIO_PCI_CAP_DEVICE_CFG

#define VIRTIO_PCI_CAP_DEVICE_CFG   4

VIRTIO_PCI_CAP_ID

#define VIRTIO_PCI_CAP_ID   0x09

VIRTIO_PCM_BUFFER

#define VIRTIO_PCM_BUFFER   (VIRTIO_PCM_PERIOD * 4)

VIRTIO_PCM_PERIOD

#define VIRTIO_PCM_PERIOD   2048

---

| Low Latency | 128 frame | 3 Period | 512 (period_bytes) | 1,536 (buffer_bytes) | General | 512 frame | 4 period | 2048 (period_bytes) | 8,192 (buffer_bytes)

| Media/Battery| 2048 frame | 3 period | 8,192 (period_byte) | 24,576 (buffer_bytes)

Latency profiles |-----------------------------— | Low latency | 8ms | 1 Page | General | 43 ms | 2 page |Media/Battery| 128 ms | 6 Pages |------------------------------—

Formulas: frame_bytes = channels (2=stereo) x bytes_per_sample period_bytes = period_frames x frame_bytes byffer_bytes = period_bytes x N_periods latency = buffer_bytes / (rate x frame_bytes) = N x period_frames / rate) period_frames = rate x target_latency / N

Sample bytes value U8/S8 = 1 bytes S16 = 2 bytes S24 = 3 bytes S24 in 32_BIT Container = 4 bytes S32/FLOAT32 = 4 bytes FLOAT64 = 8 bytes

Let's choose General profile

VIRTQ_DESC_F_NEXT

#define VIRTQ_DESC_F_NEXT   1

VIRTQ_DESC_F_WRITE

#define VIRTQ_DESC_F_WRITE   2

Typedef Documentation

virtio_snd_pcm_xfer

typedef struct _snd_xfer_ virtio_snd_pcm_xfer

virtio_snd_query_info

typedef struct _virtio_snd_query_info_ virtio_snd_query_info

Enumeration Type Documentation

anonymous enum

anonymous enum

Enumerator
VIRTIO_SND_R_JACK_INFO
VIRTIO_SND_R_JACK_REMAP
VIRTIO_SND_R_PCM_INFO
VIRTIO_SND_R_PCM_SET_PARAMS
VIRTIO_SND_R_PCM_PREPARE
VIRTIO_SND_R_PCM_RELEASE
VIRTIO_SND_R_PCM_START
VIRTIO_SND_R_PCM_STOP
VIRTIO_SND_R_CHMAP_INFO
VIRTIO_SND_R_PCM_XFER
VIRTIO_SND_R_CTL_INFO
VIRTIO_SND_R_CTL_ENUM_ITEMS
VIRTIO_SND_R_CTL_READ
VIRTIO_SND_R_CTL_WRITE
VIRTIO_SND_R_CTL_TLV_READ
VIRTIO_SND_R_CTL_TLV_WRITE
VIRTIO_SND_R_CTL_TLV_COMMAND
VIRTIO_SND_EVT_JACK_CONNECTED
VIRTIO_SND_EVT_JACK_DISCONNECTED
VIRTIO_SND_EVT_PCM_PERIOD_ELAPSED
VIRTIO_SND_EVT_PCM_XRUN
VIRTIO_SND_EVT_CTL_NOTIFY
VIRTIO_SND_S_OK
VIRTIO_SND_S_BAD_MSG
VIRTIO_SND_S_NOT_SUPP
VIRTIO_SND_S_IO_ERR

anonymous enum

anonymous enum

Enumerator
VIRTIO_SND_PCM_F_SHMEM_HOST
VIRTIO_SND_PCM_F_SHMEM_GUEST
VIRTIO_SND_PCM_F_MSG_POLLING
VIRTIO_SND_PCM_F_EVT_SHMEM_PERIODS
VIRTIO_SND_PCM_F_EVT_XRUNS

anonymous enum

anonymous enum

Enumerator
VIRTIO_SND_PCM_FMT_IMA_ADPCM
VIRTIO_SND_PCM_FMT_MU_LAW
VIRTIO_SND_PCM_FMT_A_LAW
VIRTIO_SND_PCM_FMT_S8
VIRTIO_SND_PCM_FMT_U8
VIRTIO_SND_PCM_FMT_S16
VIRTIO_SND_PCM_FMT_U16
VIRTIO_SND_PCM_FMT_S18_3
VIRTIO_SND_PCM_FMT_U18_3
VIRTIO_SND_PCM_FMT_S20_3
VIRTIO_SND_PCM_FMT_U20_3
VIRTIO_SND_PCM_FMT_S24_3
VIRTIO_SND_PCM_FMT_U24_3
VIRTIO_SND_PCM_FMT_S20
VIRTIO_SND_PCM_FMT_U20
VIRTIO_SND_PCM_FMT_S24
VIRTIO_SND_PCM_FMT_U24
VIRTIO_SND_PCM_FMT_S32
VIRTIO_SND_PCM_FMT_U32
VIRTIO_SND_PCM_FMT_FLOAT
VIRTIO_SND_PCM_FMT_FLOAT64
VIRTIO_SND_PCM_FMT_DSD_U8
VIRTIO_SND_PCM_FMT_DSD_U16
VIRTIO_SND_PCM_FMT_DSD_U32
VIRTIO_SND_PCM_FMT_IEC958_SUBFRAME

anonymous enum

anonymous enum

Enumerator
VIRTIO_SND_PCM_RATE_5512
VIRTIO_SND_PCM_RATE_8000
VIRTIO_SND_PCM_RATE_11025
VIRTIO_SND_PCM_RATE_16000
VIRTIO_SND_PCM_RATE_22050
VIRTIO_SND_PCM_RATE_32000
VIRTIO_SND_PCM_RATE_44100
VIRTIO_SND_PCM_RATE_48000
VIRTIO_SND_PCM_RATE_64000
VIRTIO_SND_PCM_RATE_88200
VIRTIO_SND_PCM_RATE_96000
VIRTIO_SND_PCM_RATE_176400
VIRTIO_SND_PCM_RATE_192000
VIRTIO_SND_PCM_RATE_384000

Function Documentation

AU_DRIVER_FLAGS()

AU_DRIVER_FLAGS

(

AU_DRV_FLAG_UNLOADABLE

)

AuDriverMain()

AU_EXTERN AU_EXPORT int AuDriverMain

(

AuDriver *

drv

)

AuDriverUnload()

AU_EXTERN AU_EXPORT int AuDriverUnload

(

void

)

virtio_snd_output_start()

int virtio_snd_output_start

(

)

virtio_snd_output_stop()

int virtio_snd_output_stop

(

)

virtio_snd_read()

int virtio_snd_read	(	uint8_t *	buffer,
		size_t	len
	)

virtio_snd_set_vol()

int virtio_snd_set_vol

(

uint8_t

vol

)

virtio_snd_write()

int virtio_snd_write	(	uint8_t *	buffer,
		size_t	len
	)