diff options
Diffstat (limited to 'media/libcubeb/src/cubeb_sun.c')
| -rw-r--r-- | media/libcubeb/src/cubeb_sun.c | 737 |
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}; 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