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/*
* Copyright © 2019-2020 Nia Alarie <nia@NetBSD.org>
*
* This program is made available under an ISC-style license. See the
* accompanying file LICENSE for details.
*/
#include "cubeb-internal.h"
#include "cubeb/cubeb.h"
#include "cubeb_tracing.h"
#include <fcntl.h>
#include <limits.h>
#include <pthread.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/audioio.h>
#include <sys/ioctl.h>
#include <unistd.h>
/* Default to 4 + 1 for the default device. */
#ifndef SUN_DEVICE_COUNT
#define SUN_DEVICE_COUNT (5)
#endif
/* Supported well by most hardware. */
#ifndef SUN_PREFER_RATE
#define SUN_PREFER_RATE (48000)
#endif
/* Standard acceptable minimum. */
#ifndef SUN_LATENCY_MS
#define SUN_LATENCY_MS (40)
#endif
#ifndef SUN_DEFAULT_DEVICE
#define SUN_DEFAULT_DEVICE "/dev/audio"
#endif
#ifndef SUN_BUFFER_FRAMES
#define SUN_BUFFER_FRAMES (32)
#endif
/*
* Supported on NetBSD regardless of hardware.
*/
#ifndef SUN_MAX_CHANNELS
#ifdef __NetBSD__
#define SUN_MAX_CHANNELS (12)
#else
#define SUN_MAX_CHANNELS (2)
#endif
#endif
#ifndef SUN_MIN_RATE
#define SUN_MIN_RATE (1000)
#endif
#ifndef SUN_MAX_RATE
#define SUN_MAX_RATE (192000)
#endif
static struct cubeb_ops const sun_ops;
struct cubeb {
struct cubeb_ops const * ops;
};
struct sun_stream {
char name[32];
int fd;
void * buf;
struct audio_info info;
unsigned frame_size; /* precision in bytes * channels */
bool floating;
};
struct cubeb_stream {
struct cubeb * context;
void * user_ptr;
pthread_t thread;
pthread_mutex_t mutex; /* protects running, volume, frames_written */
bool running;
float volume;
struct sun_stream play;
struct sun_stream record;
cubeb_data_callback data_cb;
cubeb_state_callback state_cb;
uint64_t frames_written;
uint64_t blocks_written;
};
int
sun_init(cubeb ** context, char const * context_name)
{
cubeb * c;
(void)context_name;
if ((c = calloc(1, sizeof(cubeb))) == NULL) {
return CUBEB_ERROR;
}
c->ops = &sun_ops;
*context = c;
return CUBEB_OK;
}
static void
sun_destroy(cubeb * context)
{
free(context);
}
static char const *
sun_get_backend_id(cubeb * context)
{
return "sun";
}
static int
sun_get_preferred_sample_rate(cubeb * context, uint32_t * rate)
{
(void)context;
*rate = SUN_PREFER_RATE;
return CUBEB_OK;
}
static int
sun_get_max_channel_count(cubeb * context, uint32_t * max_channels)
{
(void)context;
*max_channels = SUN_MAX_CHANNELS;
return CUBEB_OK;
}
static int
sun_get_min_latency(cubeb * context, cubeb_stream_params params,
uint32_t * latency_frames)
{
(void)context;
*latency_frames = SUN_LATENCY_MS * params.rate / 1000;
return CUBEB_OK;
}
static int
sun_get_hwinfo(const char * device, struct audio_info * format, int * props,
struct audio_device * dev)
{
int fd = -1;
if ((fd = open(device, O_RDONLY)) == -1) {
goto error;
}
#ifdef AUDIO_GETFORMAT
if (ioctl(fd, AUDIO_GETFORMAT, format) != 0) {
goto error;
}
#endif
#ifdef AUDIO_GETPROPS
if (ioctl(fd, AUDIO_GETPROPS, props) != 0) {
goto error;
}
#endif
if (ioctl(fd, AUDIO_GETDEV, dev) != 0) {
goto error;
}
close(fd);
return CUBEB_OK;
error:
if (fd != -1) {
close(fd);
}
return CUBEB_ERROR;
}
/*
* XXX: PR kern/54264
*/
static int
sun_prinfo_verify_sanity(struct audio_prinfo * prinfo)
{
return prinfo->precision >= 8 && prinfo->precision <= 32 &&
prinfo->channels >= 1 && prinfo->channels < SUN_MAX_CHANNELS &&
prinfo->sample_rate < SUN_MAX_RATE &&
prinfo->sample_rate > SUN_MIN_RATE;
}
static int
sun_enumerate_devices(cubeb * context, cubeb_device_type type,
cubeb_device_collection * collection)
{
unsigned i;
cubeb_device_info device = {0};
char dev[16] = SUN_DEFAULT_DEVICE;
char dev_friendly[64];
struct audio_info hwfmt;
struct audio_device hwname;
struct audio_prinfo * prinfo = NULL;
int hwprops;
collection->device = calloc(SUN_DEVICE_COUNT, sizeof(cubeb_device_info));
if (collection->device == NULL) {
return CUBEB_ERROR;
}
collection->count = 0;
for (i = 0; i < SUN_DEVICE_COUNT; ++i) {
if (i > 0) {
(void)snprintf(dev, sizeof(dev), "/dev/audio%u", i - 1);
}
if (sun_get_hwinfo(dev, &hwfmt, &hwprops, &hwname) != CUBEB_OK) {
continue;
}
#ifdef AUDIO_GETPROPS
device.type = 0;
if ((hwprops & AUDIO_PROP_CAPTURE) != 0 &&
sun_prinfo_verify_sanity(&hwfmt.record)) {
/* the device supports recording, probably */
device.type |= CUBEB_DEVICE_TYPE_INPUT;
}
if ((hwprops & AUDIO_PROP_PLAYBACK) != 0 &&
sun_prinfo_verify_sanity(&hwfmt.play)) {
/* the device supports playback, probably */
device.type |= CUBEB_DEVICE_TYPE_OUTPUT;
}
switch (device.type) {
case 0:
/* device doesn't do input or output, aliens probably involved */
continue;
case CUBEB_DEVICE_TYPE_INPUT:
if ((type & CUBEB_DEVICE_TYPE_INPUT) == 0) {
/* this device is input only, not scanning for those, skip it */
continue;
}
break;
case CUBEB_DEVICE_TYPE_OUTPUT:
if ((type & CUBEB_DEVICE_TYPE_OUTPUT) == 0) {
/* this device is output only, not scanning for those, skip it */
continue;
}
break;
}
if ((type & CUBEB_DEVICE_TYPE_INPUT) != 0) {
prinfo = &hwfmt.record;
}
if ((type & CUBEB_DEVICE_TYPE_OUTPUT) != 0) {
prinfo = &hwfmt.play;
}
#endif
if (i > 0) {
(void)snprintf(dev_friendly, sizeof(dev_friendly), "%s %s %s (%d)",
hwname.name, hwname.version, hwname.config, i - 1);
} else {
(void)snprintf(dev_friendly, sizeof(dev_friendly), "%s %s %s (default)",
hwname.name, hwname.version, hwname.config);
}
device.devid = (void *)(uintptr_t)i;
device.device_id = strdup(dev);
device.friendly_name = strdup(dev_friendly);
device.group_id = strdup(dev);
device.vendor_name = strdup(hwname.name);
device.type = type;
device.state = CUBEB_DEVICE_STATE_ENABLED;
device.preferred =
(i == 0) ? CUBEB_DEVICE_PREF_ALL : CUBEB_DEVICE_PREF_NONE;
#ifdef AUDIO_GETFORMAT
device.max_channels = prinfo->channels;
device.default_rate = prinfo->sample_rate;
#else
device.max_channels = 2;
device.default_rate = SUN_PREFER_RATE;
#endif
device.default_format = CUBEB_DEVICE_FMT_S16NE;
device.format = CUBEB_DEVICE_FMT_S16NE;
device.min_rate = SUN_MIN_RATE;
device.max_rate = SUN_MAX_RATE;
device.latency_lo = SUN_LATENCY_MS * SUN_MIN_RATE / 1000;
device.latency_hi = SUN_LATENCY_MS * SUN_MAX_RATE / 1000;
collection->device[collection->count++] = device;
}
return CUBEB_OK;
}
static int
sun_device_collection_destroy(cubeb * context,
cubeb_device_collection * collection)
{
unsigned i;
for (i = 0; i < collection->count; ++i) {
free((char *)collection->device[i].device_id);
free((char *)collection->device[i].friendly_name);
free((char *)collection->device[i].group_id);
free((char *)collection->device[i].vendor_name);
}
free(collection->device);
return CUBEB_OK;
}
static int
sun_copy_params(int fd, cubeb_stream * stream, cubeb_stream_params * params,
struct audio_info * info, struct audio_prinfo * prinfo)
{
prinfo->channels = params->channels;
prinfo->sample_rate = params->rate;
#ifdef AUDIO_ENCODING_SLINEAR_LE
switch (params->format) {
case CUBEB_SAMPLE_S16LE:
prinfo->encoding = AUDIO_ENCODING_SLINEAR_LE;
prinfo->precision = 16;
break;
case CUBEB_SAMPLE_S16BE:
prinfo->encoding = AUDIO_ENCODING_SLINEAR_BE;
prinfo->precision = 16;
break;
case CUBEB_SAMPLE_FLOAT32NE:
prinfo->encoding = AUDIO_ENCODING_SLINEAR;
prinfo->precision = 32;
break;
default:
LOG("Unsupported format");
return CUBEB_ERROR_INVALID_FORMAT;
}
#else
switch (params->format) {
case CUBEB_SAMPLE_S16NE:
prinfo->encoding = AUDIO_ENCODING_LINEAR;
prinfo->precision = 16;
break;
case CUBEB_SAMPLE_FLOAT32NE:
prinfo->encoding = AUDIO_ENCODING_LINEAR;
prinfo->precision = 32;
break;
default:
LOG("Unsupported format");
return CUBEB_ERROR_INVALID_FORMAT;
}
#endif
if (ioctl(fd, AUDIO_SETINFO, info) == -1) {
return CUBEB_ERROR;
}
if (ioctl(fd, AUDIO_GETINFO, info) == -1) {
return CUBEB_ERROR;
}
return CUBEB_OK;
}
static int
sun_stream_stop(cubeb_stream * s)
{
pthread_mutex_lock(&s->mutex);
if (s->running) {
s->running = false;
pthread_mutex_unlock(&s->mutex);
pthread_join(s->thread, NULL);
} else {
pthread_mutex_unlock(&s->mutex);
}
return CUBEB_OK;
}
static void
sun_stream_destroy(cubeb_stream * s)
{
sun_stream_stop(s);
pthread_mutex_destroy(&s->mutex);
if (s->play.fd != -1) {
close(s->play.fd);
}
if (s->record.fd != -1) {
close(s->record.fd);
}
free(s->play.buf);
free(s->record.buf);
free(s);
}
static void
sun_float_to_linear32(void * buf, unsigned sample_count, float vol)
{
float * in = buf;
int32_t * out = buf;
int32_t * tail = out + sample_count;
while (out < tail) {
float f = *(in++) * vol;
if (f < -1.0)
f = -1.0;
else if (f > 1.0)
f = 1.0;
*(out++) = f * (float)INT32_MAX;
}
}
static void
sun_linear32_to_float(void * buf, unsigned sample_count)
{
int32_t * in = buf;
float * out = buf;
float * tail = out + sample_count;
while (out < tail) {
*(out++) = (1.0 / 0x80000000) * *(in++);
}
}
static void
sun_linear16_set_vol(int16_t * buf, unsigned sample_count, float vol)
{
unsigned i;
int32_t multiplier = vol * 0x8000;
for (i = 0; i < sample_count; ++i) {
buf[i] = (buf[i] * multiplier) >> 15;
}
}
static void *
sun_io_routine(void * arg)
{
cubeb_stream * s = arg;
cubeb_state state = CUBEB_STATE_STARTED;
size_t to_read = 0;
long to_write = 0;
size_t write_ofs = 0;
size_t read_ofs = 0;
int drain = 0;
CUBEB_REGISTER_THREAD("cubeb rendering thread");
s->state_cb(s, s->user_ptr, CUBEB_STATE_STARTED);
while (state != CUBEB_STATE_ERROR) {
pthread_mutex_lock(&s->mutex);
if (!s->running) {
pthread_mutex_unlock(&s->mutex);
state = CUBEB_STATE_STOPPED;
break;
}
pthread_mutex_unlock(&s->mutex);
if (s->record.fd != -1 && s->record.floating) {
sun_linear32_to_float(s->record.buf,
s->record.info.record.channels * SUN_BUFFER_FRAMES);
}
to_write = s->data_cb(s, s->user_ptr, s->record.buf, s->play.buf,
SUN_BUFFER_FRAMES);
if (to_write == CUBEB_ERROR) {
state = CUBEB_STATE_ERROR;
break;
}
if (s->play.fd != -1) {
float vol;
pthread_mutex_lock(&s->mutex);
vol = s->volume;
pthread_mutex_unlock(&s->mutex);
if (s->play.floating) {
sun_float_to_linear32(s->play.buf,
s->play.info.play.channels * to_write, vol);
} else {
sun_linear16_set_vol(s->play.buf, s->play.info.play.channels * to_write,
vol);
}
}
if (to_write < SUN_BUFFER_FRAMES) {
drain = 1;
}
to_write = s->play.fd != -1 ? to_write : 0;
to_read = s->record.fd != -1 ? SUN_BUFFER_FRAMES : 0;
write_ofs = 0;
read_ofs = 0;
while (to_write > 0 || to_read > 0) {
size_t bytes;
ssize_t n, frames;
if (to_write > 0) {
bytes = to_write * s->play.frame_size;
if ((n = write(s->play.fd, (uint8_t *)s->play.buf + write_ofs, bytes)) <
0) {
state = CUBEB_STATE_ERROR;
break;
}
frames = n / s->play.frame_size;
pthread_mutex_lock(&s->mutex);
s->frames_written += frames;
pthread_mutex_unlock(&s->mutex);
to_write -= frames;
write_ofs += n;
}
if (to_read > 0) {
bytes = to_read * s->record.frame_size;
if ((n = read(s->record.fd, (uint8_t *)s->record.buf + read_ofs,
bytes)) < 0) {
state = CUBEB_STATE_ERROR;
break;
}
frames = n / s->record.frame_size;
to_read -= frames;
read_ofs += n;
}
}
if (drain && state != CUBEB_STATE_ERROR) {
state = CUBEB_STATE_DRAINED;
break;
}
}
s->state_cb(s, s->user_ptr, state);
CUBEB_UNREGISTER_THREAD();
return NULL;
}
static int
sun_stream_init(cubeb * context, cubeb_stream ** stream,
char const * stream_name, cubeb_devid input_device,
cubeb_stream_params * input_stream_params,
cubeb_devid output_device,
cubeb_stream_params * output_stream_params,
unsigned latency_frames, cubeb_data_callback data_callback,
cubeb_state_callback state_callback, void * user_ptr)
{
int ret = CUBEB_OK;
cubeb_stream * s = NULL;
(void)stream_name;
(void)latency_frames;
if ((s = calloc(1, sizeof(cubeb_stream))) == NULL) {
ret = CUBEB_ERROR;
goto error;
}
s->record.fd = -1;
s->play.fd = -1;
if (input_device != 0) {
snprintf(s->record.name, sizeof(s->record.name), "/dev/audio%zu",
(uintptr_t)input_device - 1);
} else {
snprintf(s->record.name, sizeof(s->record.name), "%s", SUN_DEFAULT_DEVICE);
}
if (output_device != 0) {
snprintf(s->play.name, sizeof(s->play.name), "/dev/audio%zu",
(uintptr_t)output_device - 1);
} else {
snprintf(s->play.name, sizeof(s->play.name), "%s", SUN_DEFAULT_DEVICE);
}
if (input_stream_params != NULL) {
if (input_stream_params->prefs & CUBEB_STREAM_PREF_LOOPBACK) {
LOG("Loopback not supported");
ret = CUBEB_ERROR_NOT_SUPPORTED;
goto error;
}
if (s->record.fd == -1) {
if ((s->record.fd = open(s->record.name, O_RDONLY)) == -1) {
LOG("Audio device could not be opened as read-only");
ret = CUBEB_ERROR_DEVICE_UNAVAILABLE;
goto error;
}
}
AUDIO_INITINFO(&s->record.info);
#ifdef AUMODE_RECORD
s->record.info.mode = AUMODE_RECORD;
#endif
if ((ret = sun_copy_params(s->record.fd, s, input_stream_params,
&s->record.info, &s->record.info.record)) !=
CUBEB_OK) {
LOG("Setting record params failed");
goto error;
}
s->record.floating =
(input_stream_params->format == CUBEB_SAMPLE_FLOAT32NE);
}
if (output_stream_params != NULL) {
if (output_stream_params->prefs & CUBEB_STREAM_PREF_LOOPBACK) {
LOG("Loopback not supported");
ret = CUBEB_ERROR_NOT_SUPPORTED;
goto error;
}
if (s->play.fd == -1) {
if ((s->play.fd = open(s->play.name, O_WRONLY)) == -1) {
LOG("Audio device could not be opened as write-only");
ret = CUBEB_ERROR_DEVICE_UNAVAILABLE;
goto error;
}
}
AUDIO_INITINFO(&s->play.info);
#ifdef AUMODE_PLAY
s->play.info.mode = AUMODE_PLAY;
#endif
if ((ret = sun_copy_params(s->play.fd, s, output_stream_params,
&s->play.info, &s->play.info.play)) !=
CUBEB_OK) {
LOG("Setting play params failed");
goto error;
}
s->play.floating = (output_stream_params->format == CUBEB_SAMPLE_FLOAT32NE);
}
s->context = context;
s->volume = 1.0;
s->state_cb = state_callback;
s->data_cb = data_callback;
s->user_ptr = user_ptr;
if (pthread_mutex_init(&s->mutex, NULL) != 0) {
LOG("Failed to create mutex");
goto error;
}
s->play.frame_size =
s->play.info.play.channels * (s->play.info.play.precision / 8);
if (s->play.fd != -1 &&
(s->play.buf = calloc(SUN_BUFFER_FRAMES, s->play.frame_size)) == NULL) {
ret = CUBEB_ERROR;
goto error;
}
s->record.frame_size =
s->record.info.record.channels * (s->record.info.record.precision / 8);
if (s->record.fd != -1 &&
(s->record.buf = calloc(SUN_BUFFER_FRAMES, s->record.frame_size)) ==
NULL) {
ret = CUBEB_ERROR;
goto error;
}
*stream = s;
return CUBEB_OK;
error:
if (s != NULL) {
sun_stream_destroy(s);
}
return ret;
}
static int
sun_stream_start(cubeb_stream * s)
{
s->running = true;
if (pthread_create(&s->thread, NULL, sun_io_routine, s) != 0) {
LOG("Couldn't create thread");
return CUBEB_ERROR;
}
return CUBEB_OK;
}
static int
sun_stream_get_position(cubeb_stream * s, uint64_t * position)
{
#ifdef AUDIO_GETOOFFS
struct audio_offset offset;
if (ioctl(s->play.fd, AUDIO_GETOOFFS, &offset) == -1) {
return CUBEB_ERROR;
}
s->blocks_written += offset.deltablks;
*position = (s->blocks_written * s->play.info.blocksize) / s->play.frame_size;
return CUBEB_OK;
#else
pthread_mutex_lock(&s->mutex);
*position = s->frames_written;
pthread_mutex_unlock(&s->mutex);
return CUBEB_OK;
#endif
}
static int
sun_stream_get_latency(cubeb_stream * s, uint32_t * latency)
{
#ifdef AUDIO_GETBUFINFO
struct audio_info info;
if (ioctl(s->play.fd, AUDIO_GETBUFINFO, &info) == -1) {
return CUBEB_ERROR;
}
*latency = (info.play.seek + info.blocksize) / s->play.frame_size;
return CUBEB_OK;
#else
cubeb_stream_params params;
params.rate = s->play.info.play.sample_rate;
return sun_get_min_latency(NULL, params, latency);
#endif
}
static int
sun_stream_set_volume(cubeb_stream * stream, float volume)
{
pthread_mutex_lock(&stream->mutex);
stream->volume = volume;
pthread_mutex_unlock(&stream->mutex);
return CUBEB_OK;
}
static int
sun_get_current_device(cubeb_stream * stream, cubeb_device ** const device)
{
*device = calloc(1, sizeof(cubeb_device));
if (*device == NULL) {
return CUBEB_ERROR;
}
(*device)->input_name =
stream->record.fd != -1 ? strdup(stream->record.name) : NULL;
(*device)->output_name =
stream->play.fd != -1 ? strdup(stream->play.name) : NULL;
return CUBEB_OK;
}
static int
sun_stream_device_destroy(cubeb_stream * stream, cubeb_device * device)
{
(void)stream;
free(device->input_name);
free(device->output_name);
free(device);
return CUBEB_OK;
}
static struct cubeb_ops const sun_ops = {
.init = sun_init,
.get_backend_id = sun_get_backend_id,
.get_max_channel_count = sun_get_max_channel_count,
.get_min_latency = sun_get_min_latency,
.get_preferred_sample_rate = sun_get_preferred_sample_rate,
.get_supported_input_processing_params = NULL,
.enumerate_devices = sun_enumerate_devices,
.device_collection_destroy = sun_device_collection_destroy,
.destroy = sun_destroy,
.stream_init = sun_stream_init,
.stream_destroy = sun_stream_destroy,
.stream_start = sun_stream_start,
.stream_stop = sun_stream_stop,
.stream_get_position = sun_stream_get_position,
.stream_get_latency = sun_stream_get_latency,
.stream_get_input_latency = NULL,
.stream_set_volume = sun_stream_set_volume,
.stream_set_name = NULL,
.stream_get_current_device = sun_get_current_device,
.stream_set_input_mute = NULL,
.stream_set_input_processing_params = NULL,
.stream_device_destroy = sun_stream_device_destroy,
.stream_register_device_changed_callback = NULL,
.register_device_collection_changed = NULL};