/* Spa MIDI node */ /* SPDX-FileCopyrightText: Copyright © 2022 Pauli Virtanen */ /* SPDX-License-Identifier: MIT */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "midi.h" #include "bluez5-interface-gen.h" SPA_LOG_TOPIC_DEFINE_STATIC(log_topic, "spa.bluez5.midi.node"); #undef SPA_LOG_TOPIC_DEFAULT #define SPA_LOG_TOPIC_DEFAULT &log_topic #define DEFAULT_CLOCK_NAME "clock.system.monotonic" #define DLL_BW 0.05 #define DEFAULT_LATENCY_OFFSET (0 * SPA_NSEC_PER_MSEC) #define MAX_BUFFERS 32 #define MIDI_RINGBUF_SIZE (8192*4) enum node_role { NODE_SERVER, NODE_CLIENT, }; struct props { char clock_name[64]; char device_name[512]; int64_t latency_offset; }; struct midi_event_ringbuffer_entry { uint64_t time; unsigned int size; }; struct midi_event_ringbuffer { struct spa_ringbuffer rbuf; uint8_t buf[MIDI_RINGBUF_SIZE]; }; struct buffer { uint32_t id; unsigned int outgoing:1; struct spa_buffer *buf; struct spa_meta_header *h; struct spa_list link; }; struct time_sync { uint64_t prev_recv_time; uint64_t recv_time; uint16_t prev_device_timestamp; uint16_t device_timestamp; uint64_t device_time; struct spa_dll dll; }; struct port { uint32_t id; enum spa_direction direction; struct spa_audio_info current_format; unsigned int have_format:1; uint64_t info_all; struct spa_port_info info; struct spa_io_buffers *io; struct spa_latency_info latency; #define IDX_EnumFormat 0 #define IDX_Meta 1 #define IDX_IO 2 #define IDX_Format 3 #define IDX_Buffers 4 #define IDX_Latency 5 #define N_PORT_PARAMS 6 struct spa_param_info params[N_PORT_PARAMS]; struct buffer buffers[MAX_BUFFERS]; uint32_t n_buffers; struct spa_list free; struct spa_list ready; int fd; uint16_t mtu; struct buffer *buffer; struct spa_pod_builder builder; struct spa_pod_frame frame; struct time_sync sync; unsigned int acquired:1; GCancellable *acquire_call; struct spa_source source; struct impl *impl; }; struct impl { struct spa_handle handle; struct spa_node node; struct spa_log *log; struct spa_loop *main_loop; struct spa_loop *data_loop; struct spa_system *data_system; GDBusConnection *conn; Bluez5GattCharacteristic1 *proxy; struct spa_hook_list hooks; struct spa_callbacks callbacks; uint64_t info_all; struct spa_node_info info; #define IDX_PropInfo 0 #define IDX_Props 1 #define IDX_NODE_IO 2 #define N_NODE_PARAMS 3 struct spa_param_info params[N_NODE_PARAMS]; struct props props; #define PORT_IN 0 #define PORT_OUT 1 #define N_PORTS 2 struct port ports[N_PORTS]; char *chr_path; unsigned int started:1; unsigned int following:1; struct spa_source timer_source; int timerfd; struct spa_io_clock *clock; struct spa_io_position *position; uint32_t duration; uint32_t rate; uint64_t current_time; uint64_t next_time; struct midi_event_ringbuffer event_rbuf; struct spa_bt_midi_parser parser; struct spa_bt_midi_parser tmp_parser; uint8_t read_buffer[MIDI_MAX_MTU]; struct spa_bt_midi_writer writer; enum node_role role; struct spa_bt_midi_server *server; }; #define CHECK_PORT(this,d,p) ((p) == 0 && ((d) == SPA_DIRECTION_INPUT || (d) == SPA_DIRECTION_OUTPUT)) #define GET_PORT(this,d,p) (&(this)->ports[(d) == SPA_DIRECTION_OUTPUT ? PORT_OUT : PORT_IN]) static void midi_event_ringbuffer_init(struct midi_event_ringbuffer *mbuf) { spa_ringbuffer_init(&mbuf->rbuf); } static int midi_event_ringbuffer_push(struct midi_event_ringbuffer *mbuf, uint64_t time, uint8_t *event, unsigned int size) { const unsigned int bufsize = sizeof(mbuf->buf); int32_t avail; uint32_t index; struct midi_event_ringbuffer_entry evt = { .time = time, .size = size }; avail = spa_ringbuffer_get_write_index(&mbuf->rbuf, &index); if (avail < 0 || avail + sizeof(evt) + size > bufsize) return -ENOSPC; spa_ringbuffer_write_data(&mbuf->rbuf, mbuf->buf, bufsize, index % bufsize, &evt, sizeof(evt)); index += sizeof(evt); spa_ringbuffer_write_update(&mbuf->rbuf, index); spa_ringbuffer_write_data(&mbuf->rbuf, mbuf->buf, bufsize, index % bufsize, event, size); index += size; spa_ringbuffer_write_update(&mbuf->rbuf, index); return 0; } static int midi_event_ringbuffer_peek(struct midi_event_ringbuffer *mbuf, uint64_t *time, unsigned int *size) { const unsigned bufsize = sizeof(mbuf->buf); int32_t avail; uint32_t index; struct midi_event_ringbuffer_entry evt; avail = spa_ringbuffer_get_read_index(&mbuf->rbuf, &index); if (avail < (int)sizeof(evt)) return -ENOENT; spa_ringbuffer_read_data(&mbuf->rbuf, mbuf->buf, bufsize, index % bufsize, &evt, sizeof(evt)); *time = evt.time; *size = evt.size; return 0; } static int midi_event_ringbuffer_pop(struct midi_event_ringbuffer *mbuf, uint8_t *data, size_t max_size) { const unsigned bufsize = sizeof(mbuf->buf); int32_t avail; uint32_t index; struct midi_event_ringbuffer_entry evt; avail = spa_ringbuffer_get_read_index(&mbuf->rbuf, &index); if (avail < (int)sizeof(evt)) return -ENOENT; spa_ringbuffer_read_data(&mbuf->rbuf, mbuf->buf, bufsize, index % bufsize, &evt, sizeof(evt)); index += sizeof(evt); avail -= sizeof(evt); spa_ringbuffer_read_update(&mbuf->rbuf, index); if ((uint32_t)avail < evt.size) { /* corrupted ringbuffer: should never happen */ spa_assert_not_reached(); return -EINVAL; } if (evt.size <= max_size) spa_ringbuffer_read_data(&mbuf->rbuf, mbuf->buf, bufsize, index % bufsize, data, SPA_MIN(max_size, evt.size)); index += evt.size; spa_ringbuffer_read_update(&mbuf->rbuf, index); if (evt.size > max_size) return -ENOSPC; return 0; } static void reset_props(struct props *props) { props->latency_offset = DEFAULT_LATENCY_OFFSET; strncpy(props->clock_name, DEFAULT_CLOCK_NAME, sizeof(props->clock_name)); props->device_name[0] = '\0'; } static bool is_following(struct impl *this) { return this->position && this->clock && this->position->clock.id != this->clock->id; } static int set_timeout(struct impl *this, uint64_t time) { struct itimerspec ts; ts.it_value.tv_sec = time / SPA_NSEC_PER_SEC; ts.it_value.tv_nsec = time % SPA_NSEC_PER_SEC; ts.it_interval.tv_sec = 0; ts.it_interval.tv_nsec = 0; return spa_system_timerfd_settime(this->data_system, this->timerfd, SPA_FD_TIMER_ABSTIME, &ts, NULL); } static int set_timers(struct impl *this) { struct timespec now; spa_system_clock_gettime(this->data_system, CLOCK_MONOTONIC, &now); this->next_time = SPA_TIMESPEC_TO_NSEC(&now); return set_timeout(this, this->following ? 0 : this->next_time); } static void recycle_buffer(struct impl *this, struct port *port, uint32_t buffer_id) { struct buffer *b = &port->buffers[buffer_id]; if (b->outgoing) { spa_log_trace(this->log, "%p: recycle buffer %u", this, buffer_id); spa_list_append(&port->free, &b->link); b->outgoing = false; } } static int clear_buffers(struct impl *this, struct port *port) { if (port->n_buffers > 0) { spa_list_init(&port->free); spa_list_init(&port->ready); port->n_buffers = 0; } return 0; } static void reset_buffers(struct port *port) { uint32_t i; spa_list_init(&port->free); spa_list_init(&port->ready); for (i = 0; i < port->n_buffers; i++) { struct buffer *b = &port->buffers[i]; if (port->direction == SPA_DIRECTION_OUTPUT) { spa_list_append(&port->free, &b->link); b->outgoing = false; } else { b->outgoing = true; } } } static struct buffer *peek_buffer(struct impl *this, struct port *port) { if (spa_list_is_empty(&port->free)) return NULL; return spa_list_first(&port->free, struct buffer, link); } static int prepare_buffer(struct impl *this, struct port *port) { if (port->buffer != NULL) return 0; if ((port->buffer = peek_buffer(this, port)) == NULL) return -EPIPE; spa_pod_builder_init(&port->builder, port->buffer->buf->datas[0].data, port->buffer->buf->datas[0].maxsize); spa_pod_builder_push_sequence(&port->builder, &port->frame, 0); return 0; } static int finish_buffer(struct impl *this, struct port *port) { if (port->buffer == NULL) return 0; spa_pod_builder_pop(&port->builder, &port->frame); port->buffer->buf->datas[0].chunk->offset = 0; port->buffer->buf->datas[0].chunk->size = port->builder.state.offset; /* move buffer to ready queue */ spa_list_remove(&port->buffer->link); spa_list_append(&port->ready, &port->buffer->link); port->buffer = NULL; return 0; } /* Replace value -> value + n*period, to minimize |value - target| */ static int64_t unwrap_to_closest(int64_t value, int64_t target, int64_t period) { if (value > target) value -= SPA_ROUND_DOWN(value - target + period/2, period); if (value < target) value += SPA_ROUND_DOWN(target - value + period/2, period); return value; } static int64_t time_diff(uint64_t a, uint64_t b) { if (a >= b) return a - b; else return -(int64_t)(b - a); } static void midi_event_get_last_timestamp(void *user_data, uint16_t timestamp, uint8_t *data, size_t size) { int *last_timestamp = user_data; *last_timestamp = timestamp; } static uint64_t midi_convert_time(struct time_sync *sync, uint16_t timestamp) { int offset; /* * sync->device_timestamp is a device timestamp that corresponds to system * clock time sync->device_time. * * It is the timestamp of the last MIDI event in the current packet, so we can * assume here no event here has timestamp after it. */ if (timestamp > sync->device_timestamp) offset = sync->device_timestamp + MIDI_CLOCK_PERIOD_MSEC - timestamp; else offset = sync->device_timestamp - timestamp; return sync->device_time - offset * SPA_NSEC_PER_MSEC; } static void midi_event_recv(void *user_data, uint16_t timestamp, uint8_t *data, size_t size) { struct impl *this = user_data; struct port *port = &this->ports[PORT_OUT]; struct time_sync *sync = &port->sync; uint64_t time, state = 0; int res; spa_assert(size > 0); time = midi_convert_time(sync, timestamp); spa_log_trace(this->log, "%p: event:0x%x size:%d timestamp:%d time:%"PRIu64"", this, (int)data[0], (int)size, (int)timestamp, (uint64_t)time); while (size > 0) { uint32_t ump[4]; int ump_size = spa_ump_from_midi(&data, &size, ump, sizeof(ump), 0, &state); if (ump_size <= 0) break; res = midi_event_ringbuffer_push(&this->event_rbuf, time, (uint8_t*)ump, ump_size); if (res < 0) { midi_event_ringbuffer_init(&this->event_rbuf); spa_log_warn(this->log, "%p: MIDI receive buffer overflow: %s", this, spa_strerror(res)); } } } static int unacquire_port(struct port *port) { struct impl *this = port->impl; if (!port->acquired) return 0; spa_log_debug(this->log, "%p: unacquire port:%d", this, port->direction); shutdown(port->fd, SHUT_RDWR); close(port->fd); port->fd = -1; port->acquired = false; if (this->server) spa_bt_midi_server_released(this->server, (port->direction == SPA_DIRECTION_OUTPUT)); return 0; } static int do_unacquire_port(struct spa_loop *loop, bool async, uint32_t seq, const void *data, size_t size, void *user_data) { struct port *port = user_data; /* in main thread */ unacquire_port(port); return 0; } static void on_ready_read(struct spa_source *source) { struct port *port = source->data; struct impl *this = port->impl; struct timespec now; int res, size, last_timestamp; if (SPA_FLAG_IS_SET(source->rmask, SPA_IO_ERR) || SPA_FLAG_IS_SET(source->rmask, SPA_IO_HUP)) { spa_log_debug(this->log, "%p: port:%d ERR/HUP", this, port->direction); goto stop; } spa_system_clock_gettime(this->data_system, CLOCK_MONOTONIC, &now); /* read data from socket */ again: size = recv(port->fd, this->read_buffer, sizeof(this->read_buffer), MSG_DONTWAIT | MSG_NOSIGNAL); if (size == 0) { return; } else if (size < 0) { if (errno == EINTR) goto again; if (errno == EAGAIN || errno == EWOULDBLOCK) return; goto stop; } spa_log_trace(this->log, "%p: port:%d recv data size:%d", this, port->direction, size); spa_debug_log_mem(this->log, SPA_LOG_LEVEL_TRACE, 4, this->read_buffer, size); if (port->direction != SPA_DIRECTION_OUTPUT) { /* Just monitor errors for the input port */ spa_log_debug(this->log, "%p: port:%d is not RX port; ignoring data", this, port->direction); return; } /* prepare for producing events */ if (port->io == NULL || port->n_buffers == 0 || !this->started) return; /* * Remote clock synchronization: * * Assume: Last timestamp in packet on average corresponds to packet send time. * There is some unknown latency in between, but on average it is constant. * * The `device_time` computed below is the estimated wall-clock time * corresponding to the timestamp `device_timestamp` of the last event * in the packet. This timestamp is late by the average transmission latency, * which is unknown. * * Packet reception jitter and any clock drift is smoothed over with DLL. * The estimated timestamps are stable and preserve event intervals. * * To allow latency_offset to work better, we don't write the events * to the output buffer here, but instead put them to a ringbuffer. * This is because if the offset shifts events to later buffers, * this is simpler to handle with the rbuf. */ last_timestamp = -1; spa_bt_midi_parser_dup(&this->parser, &this->tmp_parser, true); res = spa_bt_midi_parser_parse(&this->tmp_parser, this->read_buffer, size, true, midi_event_get_last_timestamp, &last_timestamp); if (res >= 0 && last_timestamp >= 0) { struct time_sync *sync = &port->sync; int64_t clock_elapsed; int64_t device_elapsed; int64_t err_nsec; double corr, tcorr; sync->prev_recv_time = sync->recv_time; sync->recv_time = SPA_TIMESPEC_TO_NSEC(&now); sync->prev_device_timestamp = sync->device_timestamp; sync->device_timestamp = last_timestamp; if (port->sync.prev_recv_time == 0) { sync->prev_recv_time = sync->recv_time; sync->prev_device_timestamp = sync->device_timestamp; spa_dll_init(&sync->dll); } if (SPA_UNLIKELY(sync->dll.bw == 0)) spa_dll_set_bw(&sync->dll, DLL_BW, 1024, 48000); /* move device clock forward */ clock_elapsed = sync->recv_time - sync->prev_recv_time; device_elapsed = (int)sync->device_timestamp - (int)sync->prev_device_timestamp; device_elapsed *= SPA_NSEC_PER_MSEC; device_elapsed = unwrap_to_closest(device_elapsed, clock_elapsed, MIDI_CLOCK_PERIOD_NSEC); sync->device_time += device_elapsed; /* smooth clock sync */ err_nsec = time_diff(sync->recv_time, sync->device_time); corr = spa_dll_update(&sync->dll, -SPA_CLAMP(err_nsec, -20*SPA_NSEC_PER_MSEC, 20*SPA_NSEC_PER_MSEC) * this->rate / SPA_NSEC_PER_SEC); tcorr = SPA_MIN(device_elapsed, SPA_NSEC_PER_SEC) * (corr - 1); sync->device_time += (uint64_t)tcorr; /* reset if too much off */ if (err_nsec < -50 * SPA_NSEC_PER_MSEC || err_nsec > 200 * SPA_NSEC_PER_MSEC || SPA_ABS(tcorr) > 20*SPA_NSEC_PER_MSEC || device_elapsed < 0) { spa_log_debug(this->log, "%p: device clock sync off too much: resync", this); spa_dll_init(&sync->dll); sync->device_time = sync->recv_time; } spa_log_debug(this->log, "timestamp:%d dt:%d dt2:%d err:%.1f tcorr:%.2f (ms) corr:%f", (int)sync->device_timestamp, (int)(clock_elapsed/SPA_NSEC_PER_MSEC), (int)(device_elapsed/SPA_NSEC_PER_MSEC), (double)err_nsec / SPA_NSEC_PER_MSEC, tcorr/SPA_NSEC_PER_MSEC, corr); } /* put midi event data to the buffer */ res = spa_bt_midi_parser_parse(&this->parser, this->read_buffer, size, false, midi_event_recv, this); if (res < 0) { /* bad data */ spa_bt_midi_parser_init(&this->parser); spa_log_info(this->log, "BLE MIDI data packet parsing failed: %d", res); spa_debug_log_mem(this->log, SPA_LOG_LEVEL_DEBUG, 4, this->read_buffer, size); } return; stop: spa_log_debug(this->log, "%p: port:%d stopping port", this, port->direction); if (port->source.loop) spa_loop_remove_source(this->data_loop, &port->source); /* port->acquired is updated only from the main thread */ spa_loop_invoke(this->main_loop, do_unacquire_port, 0, NULL, 0, false, port); } static int process_output(struct impl *this) { struct port *port = &this->ports[PORT_OUT]; struct buffer *buffer; struct spa_io_buffers *io = port->io; /* Check if we are able to process */ if (io == NULL || !port->acquired) return SPA_STATUS_OK; /* Return if we already have a buffer */ if (io->status == SPA_STATUS_HAVE_DATA) return SPA_STATUS_HAVE_DATA; /* Recycle */ if (io->buffer_id < port->n_buffers) { recycle_buffer(this, port, io->buffer_id); io->buffer_id = SPA_ID_INVALID; } /* Produce buffer */ if (prepare_buffer(this, port) >= 0) { /* * this->current_time is at the end time of the buffer, and offsets * are recorded vs. the start of the buffer. */ const uint64_t start_time = this->current_time - this->duration * SPA_NSEC_PER_SEC / this->rate; const uint64_t end_time = this->current_time; uint64_t time; uint32_t offset; void *buf; unsigned int size; int res; while (true) { res = midi_event_ringbuffer_peek(&this->event_rbuf, &time, &size); if (res < 0) break; time -= this->props.latency_offset; if (time > end_time) { break; } else if (time + SPA_NSEC_PER_MSEC < start_time) { /* Log events in the past by more than 1 ms, but don't * do anything about them. The user can change the latency * offset to choose whether to tradeoff latency for more * accurate timestamps. * * TODO: maybe this information should be available in * a more visible place, some latency property? */ spa_log_debug(this->log, "%p: event in the past by %d ms", this, (int)((start_time - time) / SPA_NSEC_PER_MSEC)); } time = SPA_MAX(time, start_time) - start_time; offset = time * this->rate / SPA_NSEC_PER_SEC; offset = SPA_CLAMP(offset, 0u, this->duration - 1); spa_pod_builder_control(&port->builder, offset, SPA_CONTROL_UMP); buf = spa_pod_builder_reserve_bytes(&port->builder, size); if (buf) { midi_event_ringbuffer_pop(&this->event_rbuf, buf, size); spa_log_trace(this->log, "%p: produce event:0x%x offset:%d time:%"PRIu64"", this, (int)*(uint8_t*)buf, (int)offset, (uint64_t)(start_time + offset * SPA_NSEC_PER_SEC / this->rate)); } } finish_buffer(this, port); } /* Return if there are no buffers ready to be processed */ if (spa_list_is_empty(&port->ready)) return SPA_STATUS_OK; /* Get the new buffer from the ready list */ buffer = spa_list_first(&port->ready, struct buffer, link); spa_list_remove(&buffer->link); buffer->outgoing = true; /* Set the new buffer in IO */ io->buffer_id = buffer->id; io->status = SPA_STATUS_HAVE_DATA; /* Notify we have a buffer ready to be processed */ return SPA_STATUS_HAVE_DATA; } static int flush_packet(struct impl *this) { struct port *port = &this->ports[PORT_IN]; int res; if (this->writer.size == 0) return 0; res = send(port->fd, this->writer.buf, this->writer.size, MSG_DONTWAIT | MSG_NOSIGNAL); if (res < 0) return -errno; spa_log_trace(this->log, "%p: send packet size:%d", this, this->writer.size); spa_debug_log_mem(this->log, SPA_LOG_LEVEL_TRACE, 4, this->writer.buf, this->writer.size); return 0; } static int write_data(struct impl *this, struct spa_data *d) { struct port *port = &this->ports[PORT_IN]; struct spa_pod_sequence *pod; struct spa_pod_control *c; uint64_t time; int res; pod = spa_pod_from_data(d->data, d->maxsize, d->chunk->offset, d->chunk->size); if (pod == NULL) { spa_log_warn(this->log, "%p: invalid sequence in buffer max:%u offset:%u size:%u", this, d->maxsize, d->chunk->offset, d->chunk->size); return -EINVAL; } spa_bt_midi_writer_init(&this->writer, port->mtu); time = 0; SPA_POD_SEQUENCE_FOREACH(pod, c) { int size; uint8_t event[32]; if (c->type != SPA_CONTROL_UMP) continue; time = SPA_MAX(time, this->current_time + c->offset * SPA_NSEC_PER_SEC / this->rate); size = spa_ump_to_midi(SPA_POD_BODY(&c->value), SPA_POD_BODY_SIZE(&c->value), event, sizeof(event)); if (size <= 0) continue; spa_log_trace(this->log, "%p: output event:0x%x time:%"PRIu64, this, (size > 0) ? event[0] : 0, time); do { res = spa_bt_midi_writer_write(&this->writer, time, event, size); if (res < 0) { return res; } else if (res) { int res2; if ((res2 = flush_packet(this)) < 0) return res2; } } while (res); } if ((res = flush_packet(this)) < 0) return res; return 0; } static int process_input(struct impl *this) { struct port *port = &this->ports[PORT_IN]; struct buffer *b; struct spa_io_buffers *io = port->io; int res; /* Check if we are able to process */ if (io == NULL || !port->acquired) return SPA_STATUS_OK; if (io->status != SPA_STATUS_HAVE_DATA || io->buffer_id >= port->n_buffers) return SPA_STATUS_OK; b = &port->buffers[io->buffer_id]; if (!b->outgoing) { spa_log_warn(this->log, "%p: buffer %u not outgoing", this, io->buffer_id); io->status = -EINVAL; return -EINVAL; } if ((res = write_data(this, &b->buf->datas[0])) < 0) { spa_log_info(this->log, "%p: writing data failed: %s", this, spa_strerror(res)); } port->io->buffer_id = b->id; io->status = SPA_STATUS_NEED_DATA; spa_node_call_reuse_buffer(&this->callbacks, 0, io->buffer_id); return SPA_STATUS_HAVE_DATA; } static void update_position(struct impl *this) { if (SPA_LIKELY(this->position)) { this->duration = this->position->clock.duration; this->rate = this->position->clock.rate.denom; } else { this->duration = 1024; this->rate = 48000; } } static void on_timeout(struct spa_source *source) { struct impl *this = source->data; uint64_t exp; uint64_t prev_time, now_time; int status; if (!this->started) return; if (spa_system_timerfd_read(this->data_system, this->timerfd, &exp) < 0) spa_log_warn(this->log, "%p: error reading timerfd: %s", this, strerror(errno)); prev_time = this->current_time; now_time = this->current_time = this->next_time; spa_log_trace(this->log, "%p: timer %"PRIu64" %"PRIu64"", this, now_time, now_time - prev_time); if (SPA_LIKELY(this->position)) { this->duration = this->position->clock.target_duration; this->rate = this->position->clock.target_rate.denom; } else { this->duration = 1024; this->rate = 48000; } this->next_time = now_time + this->duration * SPA_NSEC_PER_SEC / this->rate; if (SPA_LIKELY(this->clock)) { this->clock->nsec = now_time; this->clock->rate = this->clock->target_rate; this->clock->position += this->clock->duration; this->clock->duration = this->duration; this->clock->rate_diff = 1.0f; this->clock->next_nsec = this->next_time; } status = process_output(this); spa_log_trace(this->log, "%p: status:%d", this, status); spa_node_call_ready(&this->callbacks, status | SPA_STATUS_NEED_DATA); set_timeout(this, this->next_time); } static int do_start(struct impl *this); static int do_release(struct impl *this); static int do_stop(struct impl *this); static void acquire_reply(GObject *source_object, GAsyncResult *res, gpointer user_data, bool notify) { struct port *port; struct impl *this; const char *method; GError *err = NULL; GUnixFDList *fd_list = NULL; GVariant *fd_handle = NULL; int fd; guint16 mtu; if (notify) { bluez5_gatt_characteristic1_call_acquire_notify_finish( BLUEZ5_GATT_CHARACTERISTIC1(source_object), &fd_handle, &mtu, &fd_list, res, &err); } else { bluez5_gatt_characteristic1_call_acquire_write_finish( BLUEZ5_GATT_CHARACTERISTIC1(source_object), &fd_handle, &mtu, &fd_list, res, &err); } if (g_error_matches(err, G_IO_ERROR, G_IO_ERROR_CANCELLED)) { /* Operation canceled: user_data may be invalid by now. */ g_error_free(err); return; } port = user_data; this = port->impl; method = notify ? "AcquireNotify" : "AcquireWrite"; if (err) { spa_log_error(this->log, "%s.%s() for %s failed: %s", BLUEZ_GATT_CHR_INTERFACE, method, this->chr_path, err->message); goto fail; } fd = g_unix_fd_list_get(fd_list, g_variant_get_handle(fd_handle), &err); if (fd < 0) { spa_log_error(this->log, "%s.%s() for %s failed to get fd: %s", BLUEZ_GATT_CHR_INTERFACE, method, this->chr_path, err->message); goto fail; } spa_log_info(this->log, "%p: BLE MIDI %s %s success mtu:%d", this, this->chr_path, method, mtu); port->fd = fd; port->mtu = mtu; port->acquired = true; if (port->direction == SPA_DIRECTION_OUTPUT) { spa_bt_midi_parser_init(&this->parser); /* Start source */ port->source.data = port; port->source.fd = port->fd; port->source.func = on_ready_read; port->source.mask = SPA_IO_IN | SPA_IO_HUP | SPA_IO_ERR; port->source.rmask = 0; spa_loop_add_source(this->data_loop, &port->source); } return; fail: g_error_free(err); g_clear_object(&fd_list); g_clear_object(&fd_handle); do_stop(this); do_release(this); } static void acquire_notify_reply(GObject *source_object, GAsyncResult *res, gpointer user_data) { acquire_reply(source_object, res, user_data, true); } static void acquire_write_reply(GObject *source_object, GAsyncResult *res, gpointer user_data) { acquire_reply(source_object, res, user_data, false); } static int do_acquire(struct port *port) { struct impl *this = port->impl; const char *method = (port->direction == SPA_DIRECTION_OUTPUT) ? "AcquireNotify" : "AcquireWrite"; GVariant *options; GVariantBuilder builder; if (port->acquired) return 0; if (port->acquire_call) return 0; spa_log_info(this->log, "%p: port %d: client %s for BLE MIDI device characteristic %s", this, port->direction, method, this->chr_path); port->acquire_call = g_cancellable_new(); g_variant_builder_init(&builder, G_VARIANT_TYPE("a{sv}")); options = g_variant_builder_end(&builder); if (port->direction == SPA_DIRECTION_OUTPUT) { bluez5_gatt_characteristic1_call_acquire_notify( BLUEZ5_GATT_CHARACTERISTIC1(this->proxy), options, NULL, port->acquire_call, acquire_notify_reply, port); } else { bluez5_gatt_characteristic1_call_acquire_write( BLUEZ5_GATT_CHARACTERISTIC1(this->proxy), options, NULL, port->acquire_call, acquire_write_reply, port); } return 0; } static int server_do_acquire(struct port *port, int fd, uint16_t mtu) { struct impl *this = port->impl; const char *method = (port->direction == SPA_DIRECTION_OUTPUT) ? "AcquireWrite" : "AcquireNotify"; spa_log_info(this->log, "%p: port %d: server %s for BLE MIDI device characteristic %s", this, port->direction, method, this->server->chr_path); if (port->acquired) { spa_log_info(this->log, "%p: port %d: %s failed: already acquired", this, port->direction, method); return -EBUSY; } port->fd = fd; port->mtu = mtu; if (port->direction == SPA_DIRECTION_OUTPUT) spa_bt_midi_parser_init(&this->parser); /* Start source */ port->source.data = port; port->source.fd = port->fd; port->source.func = on_ready_read; port->source.mask = SPA_IO_HUP | SPA_IO_ERR; if (port->direction == SPA_DIRECTION_OUTPUT) port->source.mask |= SPA_IO_IN; port->source.rmask = 0; spa_loop_add_source(this->data_loop, &port->source); port->acquired = true; return 0; } static int server_acquire_write(void *user_data, int fd, uint16_t mtu) { struct impl *this = user_data; return server_do_acquire(&this->ports[PORT_OUT], fd, mtu); } static int server_acquire_notify(void *user_data, int fd, uint16_t mtu) { struct impl *this = user_data; return server_do_acquire(&this->ports[PORT_IN], fd, mtu); } static int server_release(void *user_data) { struct impl *this = user_data; do_release(this); return 0; } static const char *server_description(void *user_data) { struct impl *this = user_data; return this->props.device_name; } static int do_remove_port_source(struct spa_loop *loop, bool async, uint32_t seq, const void *data, size_t size, void *user_data) { struct impl *this = user_data; int i; for (i = 0; i < N_PORTS; ++i) { struct port *port = &this->ports[i]; if (port->source.loop) spa_loop_remove_source(this->data_loop, &port->source); } return 0; } static int do_remove_source(struct spa_loop *loop, bool async, uint32_t seq, const void *data, size_t size, void *user_data) { struct impl *this = user_data; if (this->timer_source.loop) spa_loop_remove_source(this->data_loop, &this->timer_source); set_timeout(this, 0); return 0; } static int do_stop(struct impl *this) { int res = 0; spa_log_debug(this->log, "%p: stop", this); spa_loop_locked(this->data_loop, do_remove_source, 0, NULL, 0, this); this->started = false; return res; } static int do_release(struct impl *this) { int res = 0; size_t i; spa_log_debug(this->log, "%p: release", this); spa_loop_locked(this->data_loop, do_remove_port_source, 0, NULL, 0, this); for (i = 0; i < N_PORTS; ++i) { struct port *port = &this->ports[i]; g_cancellable_cancel(port->acquire_call); g_clear_object(&port->acquire_call); unacquire_port(port); } return res; } static int do_start(struct impl *this) { int res; size_t i; if (this->started) return 0; this->following = is_following(this); update_position(this); spa_log_debug(this->log, "%p: start following:%d", this, this->following); for (i = 0; i < N_PORTS; ++i) { struct port *port = &this->ports[i]; switch (this->role) { case NODE_CLIENT: /* Acquire Bluetooth I/O */ if ((res = do_acquire(port)) < 0) { do_stop(this); do_release(this); return res; } break; case NODE_SERVER: /* * In MIDI server role, the device/BlueZ invokes * the acquire asynchronously as available/needed. */ break; default: spa_assert_not_reached(); } reset_buffers(port); } midi_event_ringbuffer_init(&this->event_rbuf); this->started = true; /* Start timer */ this->timer_source.data = this; this->timer_source.fd = this->timerfd; this->timer_source.func = on_timeout; this->timer_source.mask = SPA_IO_IN; this->timer_source.rmask = 0; spa_loop_add_source(this->data_loop, &this->timer_source); set_timers(this); return 0; } static int do_reassign_follower(struct spa_loop *loop, bool async, uint32_t seq, const void *data, size_t size, void *user_data) { struct impl *this = user_data; set_timers(this); return 0; } static int impl_node_set_io(void *object, uint32_t id, void *data, size_t size) { struct impl *this = object; bool following; spa_return_val_if_fail(this != NULL, -EINVAL); switch (id) { case SPA_IO_Clock: this->clock = data; if (this->clock != NULL) { spa_scnprintf(this->clock->name, sizeof(this->clock->name), "%s", this->props.clock_name); } break; case SPA_IO_Position: this->position = data; break; default: return -ENOENT; } following = is_following(this); if (this->started && following != this->following) { spa_log_debug(this->log, "%p: reassign follower %d->%d", this, this->following, following); this->following = following; spa_loop_locked(this->data_loop, do_reassign_follower, 0, NULL, 0, this); } return 0; } static void emit_node_info(struct impl *this, bool full); static int impl_node_enum_params(void *object, int seq, uint32_t id, uint32_t start, uint32_t num, const struct spa_pod *filter) { struct impl *this = object; struct spa_pod *param; struct spa_pod_builder b = { 0 }; uint8_t buffer[1024]; struct spa_result_node_params result; uint32_t count = 0; spa_return_val_if_fail(this != NULL, -EINVAL); spa_return_val_if_fail(num != 0, -EINVAL); result.id = id; result.next = start; next: result.index = result.next++; spa_pod_builder_init(&b, buffer, sizeof(buffer)); switch (id) { case SPA_PARAM_PropInfo: { struct props *p = &this->props; switch (result.index) { case 0: param = spa_pod_builder_add_object(&b, SPA_TYPE_OBJECT_PropInfo, id, SPA_PROP_INFO_id, SPA_POD_Id(SPA_PROP_latencyOffsetNsec), SPA_PROP_INFO_description, SPA_POD_String("Latency offset (ns)"), SPA_PROP_INFO_type, SPA_POD_CHOICE_RANGE_Long(0LL, INT64_MIN, INT64_MAX)); break; case 1: param = spa_pod_builder_add_object(&b, SPA_TYPE_OBJECT_PropInfo, id, SPA_PROP_INFO_id, SPA_POD_Id(SPA_PROP_deviceName), SPA_PROP_INFO_description, SPA_POD_String("Device name"), SPA_PROP_INFO_type, SPA_POD_String(p->device_name)); break; default: return 0; } break; } case SPA_PARAM_Props: { struct props *p = &this->props; switch (result.index) { case 0: param = spa_pod_builder_add_object(&b, SPA_TYPE_OBJECT_Props, id, SPA_PROP_latencyOffsetNsec, SPA_POD_Long(p->latency_offset), SPA_PROP_deviceName, SPA_POD_String(p->device_name)); break; default: return 0; } break; } default: return -ENOENT; } if (spa_pod_filter(&b, &result.param, param, filter) < 0) goto next; spa_node_emit_result(&this->hooks, seq, 0, SPA_RESULT_TYPE_NODE_PARAMS, &result); if (++count != num) goto next; return 0; } static void emit_port_info(struct impl *this, struct port *port, bool full); static void set_latency(struct impl *this, bool emit_latency) { struct port *port = &this->ports[PORT_OUT]; port->latency.min_ns = port->latency.max_ns = this->props.latency_offset; if (emit_latency) { port->info.change_mask |= SPA_PORT_CHANGE_MASK_PARAMS; port->params[IDX_Latency].flags ^= SPA_PARAM_INFO_SERIAL; emit_port_info(this, port, false); } } static int apply_props(struct impl *this, const struct spa_pod *param) { struct props new_props = this->props; int changed = 0; if (param == NULL) { reset_props(&new_props); } else { spa_pod_parse_object(param, SPA_TYPE_OBJECT_Props, NULL, SPA_PROP_latencyOffsetNsec, SPA_POD_OPT_Long(&new_props.latency_offset), SPA_PROP_deviceName, SPA_POD_OPT_Stringn(new_props.device_name, sizeof(new_props.device_name))); } changed = (memcmp(&new_props, &this->props, sizeof(struct props)) != 0); this->props = new_props; if (changed) set_latency(this, true); return changed; } static int impl_node_set_param(void *object, uint32_t id, uint32_t flags, const struct spa_pod *param) { struct impl *this = object; spa_return_val_if_fail(this != NULL, -EINVAL); switch (id) { case SPA_PARAM_Props: { if (apply_props(this, param) > 0) { this->info.change_mask |= SPA_NODE_CHANGE_MASK_PARAMS; this->params[IDX_Props].flags ^= SPA_PARAM_INFO_SERIAL; emit_node_info(this, false); } break; } default: return -ENOENT; } return 0; } static int impl_node_send_command(void *object, const struct spa_command *command) { struct impl *this = object; int res, res2; spa_return_val_if_fail(this != NULL, -EINVAL); spa_return_val_if_fail(command != NULL, -EINVAL); switch (SPA_NODE_COMMAND_ID(command)) { case SPA_NODE_COMMAND_Start: if ((res = do_start(this)) < 0) return res; break; case SPA_NODE_COMMAND_Pause: if ((res = do_stop(this)) < 0) return res; break; case SPA_NODE_COMMAND_Suspend: res = do_stop(this); if (this->role == NODE_CLIENT) res2 = do_release(this); else res2 = 0; if (res < 0) return res; if (res2 < 0) return res2; break; default: return -ENOTSUP; } return 0; } static void emit_node_info(struct impl *this, bool full) { const struct spa_dict_item node_info_items[] = { { SPA_KEY_DEVICE_API, "bluez5" }, { SPA_KEY_MEDIA_CLASS, "Midi/Bridge" }, }; uint64_t old = full ? this->info.change_mask : 0; if (full) this->info.change_mask = this->info_all; if (this->info.change_mask) { this->info.props = &SPA_DICT_INIT_ARRAY(node_info_items); spa_node_emit_info(&this->hooks, &this->info); this->info.change_mask = old; } } static void emit_port_info(struct impl *this, struct port *port, bool full) { uint64_t old = full ? port->info.change_mask : 0; if (full) port->info.change_mask = port->info_all; if (port->info.change_mask) { spa_node_emit_port_info(&this->hooks, port->direction, port->id, &port->info); port->info.change_mask = old; } } static int impl_node_add_listener(void *object, struct spa_hook *listener, const struct spa_node_events *events, void *data) { struct impl *this = object; struct spa_hook_list save; size_t i; spa_return_val_if_fail(this != NULL, -EINVAL); spa_hook_list_isolate(&this->hooks, &save, listener, events, data); emit_node_info(this, true); for (i = 0; i < N_PORTS; ++i) emit_port_info(this, &this->ports[i], true); spa_hook_list_join(&this->hooks, &save); return 0; } static int impl_node_set_callbacks(void *object, const struct spa_node_callbacks *callbacks, void *data) { struct impl *this = object; spa_return_val_if_fail(this != NULL, -EINVAL); this->callbacks = SPA_CALLBACKS_INIT(callbacks, data); return 0; } static int impl_node_sync(void *object, int seq) { struct impl *this = object; spa_return_val_if_fail(this != NULL, -EINVAL); spa_node_emit_result(&this->hooks, seq, 0, 0, NULL); return 0; } static int impl_node_add_port(void *object, enum spa_direction direction, uint32_t port_id, const struct spa_dict *props) { return -ENOTSUP; } static int impl_node_remove_port(void *object, enum spa_direction direction, uint32_t port_id) { return -ENOTSUP; } static int impl_node_port_enum_params(void *object, int seq, enum spa_direction direction, uint32_t port_id, uint32_t id, uint32_t start, uint32_t num, const struct spa_pod *filter) { struct impl *this = object; struct port *port; struct spa_pod *param; struct spa_pod_builder b = { 0 }; uint8_t buffer[1024]; struct spa_result_node_params result; uint32_t count = 0; spa_return_val_if_fail(this != NULL, -EINVAL); spa_return_val_if_fail(num != 0, -EINVAL); spa_return_val_if_fail(CHECK_PORT(this, direction, port_id), -EINVAL); port = GET_PORT(this, direction, port_id); result.id = id; result.next = start; next: result.index = result.next++; spa_pod_builder_init(&b, buffer, sizeof(buffer)); switch (id) { case SPA_PARAM_EnumFormat: if (result.index > 0) return 0; param = spa_pod_builder_add_object(&b, SPA_TYPE_OBJECT_Format, SPA_PARAM_EnumFormat, SPA_FORMAT_mediaType, SPA_POD_Id(SPA_MEDIA_TYPE_application), SPA_FORMAT_mediaSubtype, SPA_POD_Id(SPA_MEDIA_SUBTYPE_control)); break; case SPA_PARAM_Format: if (!port->have_format) return -EIO; if (result.index > 0) return 0; param = spa_pod_builder_add_object(&b, SPA_TYPE_OBJECT_Format, SPA_PARAM_Format, SPA_FORMAT_mediaType, SPA_POD_Id(SPA_MEDIA_TYPE_application), SPA_FORMAT_mediaSubtype, SPA_POD_Id(SPA_MEDIA_SUBTYPE_control)); break; case SPA_PARAM_Buffers: if (!port->have_format) return -EIO; if (result.index > 0) return 0; param = spa_pod_builder_add_object(&b, SPA_TYPE_OBJECT_ParamBuffers, id, SPA_PARAM_BUFFERS_buffers, SPA_POD_CHOICE_RANGE_Int(2, 1, MAX_BUFFERS), SPA_PARAM_BUFFERS_blocks, SPA_POD_Int(1), SPA_PARAM_BUFFERS_size, SPA_POD_CHOICE_RANGE_Int( 4096, 4096, INT32_MAX), SPA_PARAM_BUFFERS_stride, SPA_POD_Int(1)); break; case SPA_PARAM_Meta: switch (result.index) { case 0: param = spa_pod_builder_add_object(&b, SPA_TYPE_OBJECT_ParamMeta, id, SPA_PARAM_META_type, SPA_POD_Id(SPA_META_Header), SPA_PARAM_META_size, SPA_POD_Int(sizeof(struct spa_meta_header))); break; default: return 0; } break; case SPA_PARAM_IO: switch (result.index) { case 0: param = spa_pod_builder_add_object(&b, SPA_TYPE_OBJECT_ParamIO, id, SPA_PARAM_IO_id, SPA_POD_Id(SPA_IO_Buffers), SPA_PARAM_IO_size, SPA_POD_Int(sizeof(struct spa_io_buffers))); break; default: return 0; } break; case SPA_PARAM_Latency: switch (result.index) { case 0: param = spa_latency_build(&b, id, &port->latency); break; default: return 0; } break; default: return -ENOENT; } if (spa_pod_filter(&b, &result.param, param, filter) < 0) goto next; spa_node_emit_result(&this->hooks, seq, 0, SPA_RESULT_TYPE_NODE_PARAMS, &result); if (++count != num) goto next; return 0; } static int port_set_format(struct impl *this, struct port *port, uint32_t flags, const struct spa_pod *format) { int err; if (format == NULL) { if (!port->have_format) return 0; clear_buffers(this, port); port->have_format = false; } else { struct spa_audio_info info = { 0 }; if ((err = spa_format_parse(format, &info.media_type, &info.media_subtype)) < 0) return err; if (info.media_type != SPA_MEDIA_TYPE_application || info.media_subtype != SPA_MEDIA_SUBTYPE_control) return -EINVAL; port->current_format = info; port->have_format = true; } port->info.change_mask |= SPA_PORT_CHANGE_MASK_RATE; port->info.rate = SPA_FRACTION(1, 1); port->info.change_mask |= SPA_PORT_CHANGE_MASK_PARAMS; if (port->have_format) { port->params[IDX_Format] = SPA_PARAM_INFO(SPA_PARAM_Format, SPA_PARAM_INFO_READWRITE); port->params[IDX_Buffers] = SPA_PARAM_INFO(SPA_PARAM_Buffers, SPA_PARAM_INFO_READ); } else { port->params[IDX_Format] = SPA_PARAM_INFO(SPA_PARAM_Format, SPA_PARAM_INFO_WRITE); port->params[IDX_Buffers] = SPA_PARAM_INFO(SPA_PARAM_Buffers, 0); } emit_port_info(this, port, false); return 0; } static int impl_node_port_set_param(void *object, enum spa_direction direction, uint32_t port_id, uint32_t id, uint32_t flags, const struct spa_pod *param) { struct impl *this = object; struct port *port; int res; spa_return_val_if_fail(this != NULL, -EINVAL); spa_return_val_if_fail(CHECK_PORT(this, direction, port_id), -EINVAL); port = GET_PORT(this, direction, port_id); switch (id) { case SPA_PARAM_Format: res = port_set_format(this, port, flags, param); break; case SPA_PARAM_Latency: res = 0; break; default: res = -ENOENT; break; } return res; } static int impl_node_port_use_buffers(void *object, enum spa_direction direction, uint32_t port_id, uint32_t flags, struct spa_buffer **buffers, uint32_t n_buffers) { struct impl *this = object; struct port *port; uint32_t i; spa_return_val_if_fail(this != NULL, -EINVAL); spa_return_val_if_fail(CHECK_PORT(this, direction, port_id), -EINVAL); port = GET_PORT(this, direction, port_id); spa_log_debug(this->log, "%p: use buffers %d", this, n_buffers); if (!port->have_format) return -EIO; clear_buffers(this, port); for (i = 0; i < n_buffers; i++) { struct buffer *b = &port->buffers[i]; struct spa_data *d = buffers[i]->datas; b->buf = buffers[i]; b->id = i; b->h = spa_buffer_find_meta_data(buffers[i], SPA_META_Header, sizeof(*b->h)); if (d[0].data == NULL) { spa_log_error(this->log, "%p: need mapped memory", this); return -EINVAL; } } port->n_buffers = n_buffers; reset_buffers(port); return 0; } static int impl_node_port_set_io(void *object, enum spa_direction direction, uint32_t port_id, uint32_t id, void *data, size_t size) { struct impl *this = object; struct port *port; spa_return_val_if_fail(this != NULL, -EINVAL); spa_return_val_if_fail(CHECK_PORT(this, direction, port_id), -EINVAL); port = GET_PORT(this, direction, port_id); switch (id) { case SPA_IO_Buffers: port->io = data; break; default: return -ENOENT; } return 0; } static int impl_node_port_reuse_buffer(void *object, uint32_t port_id, uint32_t buffer_id) { struct impl *this = object; struct port *port; spa_return_val_if_fail(this != NULL, -EINVAL); spa_return_val_if_fail(CHECK_PORT(this, SPA_DIRECTION_OUTPUT, port_id), -EINVAL); port = GET_PORT(this, SPA_DIRECTION_OUTPUT, port_id); if (port->n_buffers == 0) return -EIO; if (buffer_id >= port->n_buffers) return -EINVAL; recycle_buffer(this, port, buffer_id); return 0; } static int impl_node_process(void *object) { struct impl *this = object; int status = SPA_STATUS_OK; spa_return_val_if_fail(this != NULL, -EINVAL); if (!this->started) return SPA_STATUS_OK; if (this->following) { if (this->position) { this->current_time = this->position->clock.nsec; } else { struct timespec now = { 0 }; spa_system_clock_gettime(this->data_system, CLOCK_MONOTONIC, &now); this->current_time = SPA_TIMESPEC_TO_NSEC(&now); } } update_position(this); if (this->following) status |= process_output(this); status |= process_input(this); return status; } static const struct spa_node_methods impl_node = { SPA_VERSION_NODE_METHODS, .add_listener = impl_node_add_listener, .set_callbacks = impl_node_set_callbacks, .sync = impl_node_sync, .enum_params = impl_node_enum_params, .set_param = impl_node_set_param, .set_io = impl_node_set_io, .send_command = impl_node_send_command, .add_port = impl_node_add_port, .remove_port = impl_node_remove_port, .port_enum_params = impl_node_port_enum_params, .port_set_param = impl_node_port_set_param, .port_use_buffers = impl_node_port_use_buffers, .port_set_io = impl_node_port_set_io, .port_reuse_buffer = impl_node_port_reuse_buffer, .process = impl_node_process, }; static const struct spa_bt_midi_server_cb impl_server = { .acquire_write = server_acquire_write, .acquire_notify = server_acquire_notify, .release = server_release, .get_description = server_description, }; static int impl_get_interface(struct spa_handle *handle, const char *type, void **interface) { struct impl *this; spa_return_val_if_fail(handle != NULL, -EINVAL); spa_return_val_if_fail(interface != NULL, -EINVAL); this = (struct impl *) handle; if (spa_streq(type, SPA_TYPE_INTERFACE_Node)) *interface = &this->node; else return -ENOENT; return 0; } static int impl_clear(struct spa_handle *handle) { struct impl *this = (struct impl *) handle; do_stop(this); do_release(this); free(this->chr_path); if (this->timerfd > 0) spa_system_close(this->data_system, this->timerfd); if (this->server) spa_bt_midi_server_destroy(this->server); g_clear_object(&this->proxy); g_clear_object(&this->conn); spa_zero(*this); return 0; } static size_t impl_get_size(const struct spa_handle_factory *factory, const struct spa_dict *params) { return sizeof(struct impl); } static int impl_init(const struct spa_handle_factory *factory, struct spa_handle *handle, const struct spa_dict *info, const struct spa_support *support, uint32_t n_support) { struct impl *this; const char *device_name = ""; int res = 0; GError *err = NULL; size_t i; spa_return_val_if_fail(factory != NULL, -EINVAL); spa_return_val_if_fail(handle != NULL, -EINVAL); handle->get_interface = impl_get_interface; handle->clear = impl_clear; this = (struct impl *) handle; this->log = spa_support_find(support, n_support, SPA_TYPE_INTERFACE_Log); this->main_loop = spa_support_find(support, n_support, SPA_TYPE_INTERFACE_Loop); this->data_loop = spa_support_find(support, n_support, SPA_TYPE_INTERFACE_DataLoop); this->data_system = spa_support_find(support, n_support, SPA_TYPE_INTERFACE_DataSystem); if (this->log == NULL) return -EINVAL; spa_log_topic_init(this->log, &log_topic); if (!(info && spa_atob(spa_dict_lookup(info, SPA_KEY_API_GLIB_MAINLOOP)))) { spa_log_error(this->log, "Glib mainloop is not usable: %s not set", SPA_KEY_API_GLIB_MAINLOOP); return -EINVAL; } if (this->data_loop == NULL) { spa_log_error(this->log, "a data loop is needed"); return -EINVAL; } if (this->data_system == NULL) { spa_log_error(this->log, "a data system is needed"); return -EINVAL; } this->role = NODE_CLIENT; if (info) { const char *str; if ((str = spa_dict_lookup(info, SPA_KEY_API_BLUEZ5_PATH)) != NULL) this->chr_path = strdup(str); if ((str = spa_dict_lookup(info, SPA_KEY_API_BLUEZ5_ROLE)) != NULL) { if (spa_streq(str, "server")) this->role = NODE_SERVER; } if ((str = spa_dict_lookup(info, "node.nick")) != NULL) device_name = str; else if ((str = spa_dict_lookup(info, "node.description")) != NULL) device_name = str; } if (this->role == NODE_CLIENT && this->chr_path == NULL) { spa_log_error(this->log, "missing MIDI service characteristic path"); res = -EINVAL; goto fail; } this->conn = g_bus_get_sync(G_BUS_TYPE_SYSTEM, NULL, &err); if (this->conn == NULL) { spa_log_error(this->log, "failed to get dbus connection: %s", err->message); g_error_free(err); res = -EIO; goto fail; } g_dbus_connection_set_exit_on_close(this->conn, FALSE); this->node.iface = SPA_INTERFACE_INIT( SPA_TYPE_INTERFACE_Node, SPA_VERSION_NODE, &impl_node, this); spa_hook_list_init(&this->hooks); reset_props(&this->props); spa_scnprintf(this->props.device_name, sizeof(this->props.device_name), "%s", device_name); /* set the node info */ this->info_all = SPA_NODE_CHANGE_MASK_FLAGS | SPA_NODE_CHANGE_MASK_PROPS | SPA_NODE_CHANGE_MASK_PARAMS; this->info = SPA_NODE_INFO_INIT(); this->info.max_input_ports = 1; this->info.max_output_ports = 1; this->info.flags = SPA_NODE_FLAG_RT; this->params[IDX_PropInfo] = SPA_PARAM_INFO(SPA_PARAM_PropInfo, SPA_PARAM_INFO_READ); this->params[IDX_Props] = SPA_PARAM_INFO(SPA_PARAM_Props, SPA_PARAM_INFO_READWRITE); this->params[IDX_NODE_IO] = SPA_PARAM_INFO(SPA_PARAM_IO, SPA_PARAM_INFO_READ); this->info.params = this->params; this->info.n_params = N_NODE_PARAMS; /* set the port info */ for (i = 0; i < N_PORTS; ++i) { struct port *port = &this->ports[i]; static const struct spa_dict_item in_port_items[] = { SPA_DICT_ITEM_INIT(SPA_KEY_FORMAT_DSP, "8 bit raw midi"), SPA_DICT_ITEM_INIT(SPA_KEY_PORT_NAME, "in"), SPA_DICT_ITEM_INIT(SPA_KEY_PORT_ALIAS, "in"), SPA_DICT_ITEM_INIT(SPA_KEY_PORT_GROUP, "group.0"), }; static const struct spa_dict_item out_port_items[] = { SPA_DICT_ITEM_INIT(SPA_KEY_FORMAT_DSP, "8 bit raw midi"), SPA_DICT_ITEM_INIT(SPA_KEY_PORT_NAME, "out"), SPA_DICT_ITEM_INIT(SPA_KEY_PORT_ALIAS, "out"), SPA_DICT_ITEM_INIT(SPA_KEY_PORT_GROUP, "group.0"), }; static const struct spa_dict in_port_props = SPA_DICT_INIT_ARRAY(in_port_items); static const struct spa_dict out_port_props = SPA_DICT_INIT_ARRAY(out_port_items); spa_zero(*port); port->impl = this; port->id = 0; port->direction = (i == PORT_OUT) ? SPA_DIRECTION_OUTPUT : SPA_DIRECTION_INPUT; port->info_all = SPA_PORT_CHANGE_MASK_FLAGS | SPA_PORT_CHANGE_MASK_PROPS | SPA_PORT_CHANGE_MASK_PARAMS; port->info = SPA_PORT_INFO_INIT(); port->info.change_mask = SPA_PORT_CHANGE_MASK_FLAGS; port->info.flags = SPA_PORT_FLAG_LIVE | SPA_PORT_FLAG_PHYSICAL | SPA_PORT_FLAG_TERMINAL; port->params[IDX_EnumFormat] = SPA_PARAM_INFO(SPA_PARAM_EnumFormat, SPA_PARAM_INFO_READ); port->params[IDX_Meta] = SPA_PARAM_INFO(SPA_PARAM_Meta, SPA_PARAM_INFO_READ); port->params[IDX_IO] = SPA_PARAM_INFO(SPA_PARAM_IO, SPA_PARAM_INFO_READ); port->params[IDX_Format] = SPA_PARAM_INFO(SPA_PARAM_Format, SPA_PARAM_INFO_WRITE); port->params[IDX_Buffers] = SPA_PARAM_INFO(SPA_PARAM_Buffers, 0); port->params[IDX_Latency] = SPA_PARAM_INFO(SPA_PARAM_Latency, SPA_PARAM_INFO_READWRITE); port->info.params = port->params; port->info.n_params = N_PORT_PARAMS; port->info.props = (i == PORT_OUT) ? &out_port_props : &in_port_props; port->latency = SPA_LATENCY_INFO(port->direction); port->latency.min_quantum = 1.0f; port->latency.max_quantum = 1.0f; /* Init the buffer lists */ spa_list_init(&port->ready); spa_list_init(&port->free); } this->duration = 1024; this->rate = 48000; set_latency(this, false); if (this->role == NODE_SERVER) { this->server = spa_bt_midi_server_new(&impl_server, this->conn, this->log, this); if (this->server == NULL) goto fail; } else { this->proxy = bluez5_gatt_characteristic1_proxy_new_sync(this->conn, G_DBUS_PROXY_FLAGS_DO_NOT_AUTO_START, BLUEZ_SERVICE, this->chr_path, NULL, &err); if (this->proxy == NULL) { spa_log_error(this->log, "Failed to create BLE MIDI GATT proxy %s: %s", this->chr_path, err->message); g_error_free(err); res = -EIO; goto fail; } } this->timerfd = spa_system_timerfd_create(this->data_system, CLOCK_MONOTONIC, SPA_FD_CLOEXEC | SPA_FD_NONBLOCK); return 0; fail: res = (res < 0) ? res : ((errno > 0) ? -errno : -EIO); impl_clear(handle); return res; } static const struct spa_interface_info impl_interfaces[] = { {SPA_TYPE_INTERFACE_Node,}, }; static int impl_enum_interface_info(const struct spa_handle_factory *factory, const struct spa_interface_info **info, uint32_t *index) { spa_return_val_if_fail(factory != NULL, -EINVAL); spa_return_val_if_fail(info != NULL, -EINVAL); spa_return_val_if_fail(index != NULL, -EINVAL); switch (*index) { case 0: *info = &impl_interfaces[*index]; break; default: return 0; } (*index)++; return 1; } static const struct spa_dict_item info_items[] = { { SPA_KEY_FACTORY_AUTHOR, "Pauli Virtanen " }, { SPA_KEY_FACTORY_DESCRIPTION, "Bluez5 MIDI connection" }, }; static const struct spa_dict info = SPA_DICT_INIT_ARRAY(info_items); const struct spa_handle_factory spa_bluez5_midi_node_factory = { SPA_VERSION_HANDLE_FACTORY, SPA_NAME_API_BLUEZ5_MIDI_NODE, &info, impl_get_size, impl_init, impl_enum_interface_info, };