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-rw-r--r--media/libcubeb/src/cubeb_sun.c737
1 files changed, 737 insertions, 0 deletions
diff --git a/media/libcubeb/src/cubeb_sun.c b/media/libcubeb/src/cubeb_sun.c
new file mode 100644
index 0000000000..d3dcb12ff3
--- /dev/null
+++ b/media/libcubeb/src/cubeb_sun.c
@@ -0,0 +1,737 @@
+/*
+ * 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,
+ .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_device_destroy = sun_stream_device_destroy,
+ .stream_register_device_changed_callback = NULL,
+ .register_device_collection_changed = NULL};