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pipewire/spa/plugins/bluez5/sco-source.c
Pauli Virtanen 4389e44903 bluez5: emit props change events only if values actually changed 
This may avoid infinite loops if parameters are being set based on events
sent by parameter changes. It's also what alsa-acp devices do, so bluez5
should follow.
2021-03-02 23:46:27 +02:00

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/* Spa SCO Source
*
* Copyright © 2019 Collabora Ltd.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
#include <unistd.h>
#include <stddef.h>
#include <stdio.h>
#include <time.h>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <spa/support/plugin.h>
#include <spa/support/loop.h>
#include <spa/support/log.h>
#include <spa/support/system.h>
#include <spa/utils/list.h>
#include <spa/utils/keys.h>
#include <spa/utils/names.h>
#include <spa/monitor/device.h>
#include <spa/node/node.h>
#include <spa/node/utils.h>
#include <spa/node/io.h>
#include <spa/node/keys.h>
#include <spa/param/param.h>
#include <spa/param/audio/format.h>
#include <spa/param/audio/format-utils.h>
#include <spa/pod/filter.h>
#include <sbc/sbc.h>
#include "defs.h"
struct props {
uint32_t min_latency;
uint32_t max_latency;
};
#define MAX_BUFFERS 32
struct buffer {
uint32_t id;
unsigned int outstanding:1;
struct spa_buffer *buf;
struct spa_meta_header *h;
struct spa_list link;
};
struct port {
struct spa_audio_info current_format;
int frame_size;
unsigned int have_format:1;
uint64_t info_all;
struct spa_port_info info;
struct spa_io_buffers *io;
struct spa_io_rate_match *rate_match;
struct spa_param_info params[8];
struct buffer buffers[MAX_BUFFERS];
uint32_t n_buffers;
struct spa_list free;
struct spa_list ready;
struct buffer *current_buffer;
uint32_t ready_offset;
};
struct impl {
struct spa_handle handle;
struct spa_node node;
struct spa_log *log;
struct spa_loop *data_loop;
struct spa_system *data_system;
struct spa_hook_list hooks;
struct spa_callbacks callbacks;
uint64_t info_all;
struct spa_node_info info;
struct spa_param_info params[8];
struct props props;
struct spa_bt_transport *transport;
struct spa_hook transport_listener;
struct port port;
unsigned int started:1;
struct spa_io_clock *clock;
struct spa_io_position *position;
/* mSBC */
sbc_t msbc;
bool msbc_seq_initialized;
uint8_t msbc_seq;
/* mSBC frame parsing */
uint8_t msbc_buffer[MSBC_ENCODED_SIZE];
uint8_t msbc_buffer_pos;
struct timespec now;
};
#define NAME "sco-source"
#define CHECK_PORT(this,d,p) ((d) == SPA_DIRECTION_OUTPUT && (p) == 0)
static const uint32_t default_min_latency = 128;
static const uint32_t default_max_latency = 512;
static void reset_props(struct props *props)
{
props->min_latency = default_min_latency;
props->max_latency = default_max_latency;
}
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_minLatency),
SPA_PROP_INFO_name, SPA_POD_String("The minimum latency"),
SPA_PROP_INFO_type, SPA_POD_CHOICE_RANGE_Int(p->min_latency, 1, INT32_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_maxLatency),
SPA_PROP_INFO_name, SPA_POD_String("The maximum latency"),
SPA_PROP_INFO_type, SPA_POD_CHOICE_RANGE_Int(p->max_latency, 1, INT32_MAX));
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_minLatency, SPA_POD_Int(p->min_latency),
SPA_PROP_maxLatency, SPA_POD_Int(p->max_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 impl_node_set_io(void *object, uint32_t id, void *data, size_t size)
{
struct impl *this = object;
spa_return_val_if_fail(this != NULL, -EINVAL);
switch (id) {
case SPA_IO_Clock:
this->clock = data;
break;
case SPA_IO_Position:
this->position = data;
break;
default:
return -ENOENT;
}
return 0;
}
static void emit_node_info(struct impl *this, bool full);
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_minLatency, SPA_POD_OPT_Int(&new_props.min_latency),
SPA_PROP_maxLatency, SPA_POD_OPT_Int(&new_props.max_latency));
}
changed = (memcmp(&new_props, &this->props, sizeof(struct props)) != 0);
this->props = new_props;
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[1].flags ^= SPA_PARAM_INFO_SERIAL;
emit_node_info(this, false);
}
break;
}
default:
return -ENOENT;
}
return 0;
}
static void reset_buffers(struct port *port)
{
uint32_t i;
spa_list_init(&port->free);
spa_list_init(&port->ready);
port->current_buffer = NULL;
for (i = 0; i < port->n_buffers; i++) {
struct buffer *b = &port->buffers[i];
spa_list_append(&port->free, &b->link);
b->outstanding = false;
}
}
static void recycle_buffer(struct impl *this, struct port *port, uint32_t buffer_id)
{
struct buffer *b = &port->buffers[buffer_id];
if (b->outstanding) {
spa_log_trace(this->log, NAME " %p: recycle buffer %u", this, buffer_id);
spa_list_append(&port->free, &b->link);
b->outstanding = false;
}
}
/* Append data to msbc buffer, syncing buffer start to frame headers */
static void msbc_buffer_append_byte(struct impl *this, uint8_t byte)
{
/* Parse mSBC frame header */
if (this->msbc_buffer_pos == 0) {
if (byte != 0x01) {
this->msbc_buffer_pos = 0;
return;
}
}
else if (this->msbc_buffer_pos == 1) {
if (!((byte & 0x0F) == 0x08 &&
((byte >> 4) & 1) == ((byte >> 5) & 1) &&
((byte >> 6) & 1) == ((byte >> 7) & 1))) {
this->msbc_buffer_pos = 0;
return;
}
}
else if (this->msbc_buffer_pos == 2) {
/* .. and beginning of MSBC frame: SYNCWORD + 2 nul bytes */
if (byte != 0xAD) {
this->msbc_buffer_pos = 0;
return;
}
}
else if (this->msbc_buffer_pos == 3) {
if (byte != 0x00) {
this->msbc_buffer_pos = 0;
return;
}
}
else if (this->msbc_buffer_pos == 4) {
if (byte != 0x00) {
this->msbc_buffer_pos = 0;
return;
}
}
else if (this->msbc_buffer_pos >= MSBC_ENCODED_SIZE) {
/* Packet completed. Reset. */
this->msbc_buffer_pos = 0;
msbc_buffer_append_byte(this, byte);
return;
}
this->msbc_buffer[this->msbc_buffer_pos] = byte;
++this->msbc_buffer_pos;
}
/*
Helper function for easier debugging
Caveat: If size_read is not a multiple of 16, then the last bytes
will not be printed / logged
*/
static void hexdump_to_log(void *log, uint8_t *read_data, int size_read)
{
int rowsize = 16*3;
int line_idx = 0;
char hexline[16*3] = "";
int i;
for (i = 0; i < size_read; ++i) {
snprintf(&hexline[line_idx], 4, "%02X ", read_data[i]);
line_idx += 3;
if (line_idx == rowsize) {
spa_log_trace(log, "Processing read data: read_data %02i: %s", i-15, hexline);
line_idx = 0;
}
}
}
/* helper function to detect if a packet consists only of zeros */
static bool is_zero_packet(uint8_t *data, int size)
{
for (int i = 0; i < size; ++i) {
if (data[i] != 0) {
return false;
}
}
return true;
}
static void preprocess_and_decode_msbc_data(void *userdata, uint8_t *read_data, int size_read)
{
struct impl *this = userdata;
struct port *port = &this->port;
struct spa_data *datas = port->current_buffer->buf->datas;
spa_log_trace(this->log, "handling mSBC data");
/* print hexdump of package */
bool flag_hexdump_to_log = false;
if (flag_hexdump_to_log) {
hexdump_to_log(this->log, read_data, size_read);
}
/* check if the packet contains only zeros - if so ignore the packet.
This is necessary, because some kernels insert bogus "all-zero" packets
into the datastream.
See https://gitlab.freedesktop.org/pipewire/pipewire/-/issues/549 */
if (is_zero_packet(read_data, size_read)) {
return;
}
int i;
for (i = 0; i < size_read; ++i) {
msbc_buffer_append_byte(this, read_data[i]);
/* Handle found mSBC packets.
*
* XXX: if there's no space for the decoded audio in
* XXX: the current buffer, we'll drop data.
*/
if (this->msbc_buffer_pos == MSBC_ENCODED_SIZE) {
spa_log_trace(this->log, "Received full mSBC packet, start processing it");
if (port->ready_offset + MSBC_DECODED_SIZE <= datas[0].maxsize) {
int seq, processed;
size_t written;
spa_log_trace(this->log,
"Output buffer has space, processing mSBC packet");
/* Check sequence number */
seq = ((this->msbc_buffer[1] >> 4) & 1) |
((this->msbc_buffer[1] >> 6) & 2);
spa_log_trace(this->log, "mSBC packet seq=%u", seq);
if (!this->msbc_seq_initialized) {
this->msbc_seq_initialized = true;
this->msbc_seq = seq;
} else if (seq != this->msbc_seq) {
spa_log_info(this->log,
"missing mSBC packet: %u != %u", seq, this->msbc_seq);
this->msbc_seq = seq;
/* TODO: Implement PLC. */
}
this->msbc_seq = (this->msbc_seq + 1) % 4;
/* decode frame */
processed = sbc_decode(
&this->msbc, this->msbc_buffer + 2, MSBC_ENCODED_SIZE - 3,
(uint8_t *)datas[0].data + port->ready_offset, MSBC_DECODED_SIZE,
&written);
if (processed < 0) {
spa_log_warn(this->log, "sbc_decode failed: %d", processed);
/* TODO: manage errors */
continue;
}
port->ready_offset += written;
} else {
spa_log_warn(this->log, "Output buffer full, dropping mSBC packet");
}
}
}
}
static int sco_source_cb(void *userdata, uint8_t *read_data, int size_read)
{
struct impl *this = userdata;
struct port *port = &this->port;
struct spa_io_buffers *io = port->io;
struct spa_data *datas;
uint32_t max_out_size;
if (this->transport == NULL) {
spa_log_debug(this->log, "no transport, stop reading");
goto stop;
}
/* get buffer */
if (!port->current_buffer) {
if (spa_list_is_empty(&port->free)) {
spa_log_warn(this->log, "buffer not available");
return 0;
}
port->current_buffer = spa_list_first(&port->free, struct buffer, link);
spa_list_remove(&port->current_buffer->link);
port->ready_offset = 0;
}
datas = port->current_buffer->buf->datas;
if (this->transport->codec == HFP_AUDIO_CODEC_MSBC) {
max_out_size = MSBC_DECODED_SIZE;
} else {
max_out_size = this->transport->read_mtu;
}
/* update the current pts */
spa_system_clock_gettime(this->data_system, CLOCK_MONOTONIC, &this->now);
/* handle data read from socket */
spa_log_debug(this->log, "read socket data %d", size_read);
if (this->transport->codec == HFP_AUDIO_CODEC_MSBC) {
preprocess_and_decode_msbc_data(userdata, read_data, size_read);
} else {
uint8_t *packet;
packet = (uint8_t *)datas[0].data + port->ready_offset;
spa_memmove(packet, read_data, size_read);
port->ready_offset += size_read;
}
/* send buffer if full */
if ((max_out_size + port->ready_offset) > (this->props.max_latency * port->frame_size)) {
uint64_t sample_count;
datas[0].chunk->offset = 0;
datas[0].chunk->size = port->ready_offset;
datas[0].chunk->stride = port->frame_size;
sample_count = datas[0].chunk->size / port->frame_size;
spa_list_append(&port->ready, &port->current_buffer->link);
port->current_buffer = NULL;
if (this->clock) {
this->clock->nsec = SPA_TIMESPEC_TO_NSEC(&this->now);
this->clock->duration = sample_count * this->clock->rate.denom / port->current_format.info.raw.rate;
this->clock->position += this->clock->duration;
this->clock->delay = 0;
this->clock->rate_diff = 1.0f;
this->clock->next_nsec = this->clock->nsec;
}
}
/* done if there are no buffers ready */
if (spa_list_is_empty(&port->ready))
return 0;
/* process the buffer if IO does not have any */
if (io->status != SPA_STATUS_HAVE_DATA) {
struct buffer *b;
if (io->buffer_id < port->n_buffers)
recycle_buffer(this, port, io->buffer_id);
b = spa_list_first(&port->ready, struct buffer, link);
spa_list_remove(&b->link);
b->outstanding = true;
io->buffer_id = b->id;
io->status = SPA_STATUS_HAVE_DATA;
}
/* notify ready */
spa_node_call_ready(&this->callbacks, SPA_STATUS_HAVE_DATA);
return 0;
stop:
return 1;
}
static int do_add_source(struct spa_loop *loop,
bool async,
uint32_t seq,
const void *data,
size_t size,
void *user_data)
{
struct impl *this = user_data;
spa_bt_sco_io_set_source_cb(this->transport->sco_io, sco_source_cb, this);
return 0;
}
static int do_start(struct impl *this)
{
bool do_accept;
int res;
/* Dont do anything if the node has already started */
if (this->started)
return 0;
/* Make sure the transport is valid */
spa_return_val_if_fail (this->transport != NULL, -EIO);
/* Do accept if Gateway; otherwise do connect for Head Unit */
do_accept = this->transport->profile & SPA_BT_PROFILE_HEADSET_AUDIO_GATEWAY;
/* acquire the socked fd (false -> connect | true -> accept) */
if ((res = spa_bt_transport_acquire(this->transport, do_accept)) < 0)
return res;
/* Reset the buffers and sample count */
reset_buffers(&this->port);
/* Init mSBC if needed */
if (this->transport->codec == HFP_AUDIO_CODEC_MSBC) {
sbc_init_msbc(&this->msbc, 0);
/* Libsbc expects audio samples by default in host endianity, mSBC requires little endian */
this->msbc.endian = SBC_LE;
this->msbc_seq_initialized = false;
this->msbc_buffer_pos = 0;
}
/* Start socket i/o */
spa_bt_transport_ensure_sco_io(this->transport, this->data_loop);
spa_loop_invoke(this->data_loop, do_add_source, 0, NULL, 0, true, this);
/* Set the started flag */
this->started = true;
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->transport)
spa_bt_sco_io_set_source_cb(this->transport->sco_io, NULL, NULL);
return 0;
}
static int do_stop(struct impl *this)
{
int res = 0;
if (!this->started)
return 0;
spa_log_debug(this->log, "sco-source %p: stop", this);
spa_loop_invoke(this->data_loop, do_remove_source, 0, NULL, 0, true, this);
this->started = false;
if (this->transport) {
/* Release the transport; it is responsible for closing the fd */
res = spa_bt_transport_release(this->transport);
}
return res;
}
static int impl_node_send_command(void *object, const struct spa_command *command)
{
struct impl *this = object;
struct port *port;
int res;
spa_return_val_if_fail(this != NULL, -EINVAL);
spa_return_val_if_fail(command != NULL, -EINVAL);
port = &this->port;
switch (SPA_NODE_COMMAND_ID(command)) {
case SPA_NODE_COMMAND_Start:
if (!port->have_format)
return -EIO;
if (port->n_buffers == 0)
return -EIO;
if ((res = do_start(this)) < 0)
return res;
break;
case SPA_NODE_COMMAND_Pause:
case SPA_NODE_COMMAND_Suspend:
if ((res = do_stop(this)) < 0)
return res;
break;
default:
return -ENOTSUP;
}
return 0;
}
static const struct spa_dict_item node_info_items[] = {
{ SPA_KEY_DEVICE_API, "bluez5" },
{ SPA_KEY_MEDIA_CLASS, "Audio/Source" },
{ SPA_KEY_NODE_DRIVER, "true" },
{ SPA_KEY_NODE_PAUSE_ON_IDLE, "false" },
};
static void emit_node_info(struct impl *this, bool full)
{
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 = 0;
}
}
static void emit_port_info(struct impl *this, struct port *port, bool full)
{
if (full)
port->info.change_mask = port->info_all;
if (port->info.change_mask) {
spa_node_emit_port_info(&this->hooks,
SPA_DIRECTION_OUTPUT, 0, &port->info);
port->info.change_mask = 0;
}
}
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;
spa_return_val_if_fail(this != NULL, -EINVAL);
spa_hook_list_isolate(&this->hooks, &save, listener, events, data);
emit_node_info(this, true);
emit_port_info(this, &this->port, 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 = &this->port;
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;
if (this->transport == NULL)
return -EIO;
/* set the info structure */
struct spa_audio_info_raw info = { 0, };
info.format = SPA_AUDIO_FORMAT_S16_LE;
info.channels = 1;
info.position[0] = SPA_AUDIO_CHANNEL_MONO;
/* CVSD format has a rate of 8kHz
* MSBC format has a rate of 16kHz */
if (this->transport->codec == HFP_AUDIO_CODEC_MSBC)
info.rate = 16000;
else
info.rate = 8000;
/* build the param */
param = spa_format_audio_raw_build(&b, id, &info);
break;
case SPA_PARAM_Format:
if (!port->have_format)
return -EIO;
if (result.index > 0)
return 0;
param = spa_format_audio_raw_build(&b, id, &port->current_format.info.raw);
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(
this->props.max_latency * port->frame_size,
this->props.min_latency * port->frame_size,
INT32_MAX),
SPA_PARAM_BUFFERS_stride, SPA_POD_Int(port->frame_size),
SPA_PARAM_BUFFERS_align, SPA_POD_Int(16));
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;
case 1:
param = spa_pod_builder_add_object(&b,
SPA_TYPE_OBJECT_ParamIO, id,
SPA_PARAM_IO_id, SPA_POD_Id(SPA_IO_RateMatch),
SPA_PARAM_IO_size, SPA_POD_Int(sizeof(struct spa_io_rate_match)));
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 clear_buffers(struct impl *this, struct port *port)
{
do_stop(this);
if (port->n_buffers > 0) {
spa_list_init(&port->free);
spa_list_init(&port->ready);
port->n_buffers = 0;
}
port->current_buffer = NULL;
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) {
spa_log_debug(this->log, "clear format");
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_audio ||
info.media_subtype != SPA_MEDIA_SUBTYPE_raw)
return -EINVAL;
if (spa_format_audio_raw_parse(format, &info.info.raw) < 0)
return -EINVAL;
port->frame_size = info.info.raw.channels * 2;
port->current_format = info;
port->have_format = true;
}
port->info.change_mask |= SPA_PORT_CHANGE_MASK_PARAMS;
if (port->have_format) {
port->info.change_mask |= SPA_PORT_CHANGE_MASK_FLAGS;
port->info.flags = SPA_PORT_FLAG_LIVE;
port->info.change_mask |= SPA_PORT_CHANGE_MASK_RATE;
port->info.rate = SPA_FRACTION(1, port->current_format.info.raw.rate);
port->params[3] = SPA_PARAM_INFO(SPA_PARAM_Format, SPA_PARAM_INFO_READWRITE);
port->params[4] = SPA_PARAM_INFO(SPA_PARAM_Buffers, SPA_PARAM_INFO_READ);
} else {
port->params[3] = SPA_PARAM_INFO(SPA_PARAM_Format, SPA_PARAM_INFO_WRITE);
port->params[4] = 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(node, direction, port_id), -EINVAL);
port = &this->port;
switch (id) {
case SPA_PARAM_Format:
res = port_set_format(this, port, flags, param);
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 = &this->port;
spa_log_debug(this->log, "use buffers %d", 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, NAME " %p: need mapped memory", this);
return -EINVAL;
}
spa_list_append(&port->free, &b->link);
b->outstanding = false;
}
port->n_buffers = n_buffers;
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 = &this->port;
switch (id) {
case SPA_IO_Buffers:
port->io = data;
break;
case SPA_IO_RateMatch:
port->rate_match = 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(port_id == 0, -EINVAL);
port = &this->port;
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;
struct port *port;
struct spa_io_buffers *io;
struct buffer *buffer;
spa_return_val_if_fail(this != NULL, -EINVAL);
port = &this->port;
io = port->io;
spa_return_val_if_fail(io != NULL, -EIO);
/* 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;
}
/* 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->outstanding = 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 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 int do_transport_destroy(struct spa_loop *loop,
bool async,
uint32_t seq,
const void *data,
size_t size,
void *user_data)
{
struct impl *this = user_data;
this->transport = NULL;
return 0;
}
static void transport_destroy(void *data)
{
struct impl *this = data;
spa_log_debug(this->log, "transport %p destroy", this->transport);
spa_loop_invoke(this->data_loop, do_transport_destroy, 0, NULL, 0, true, this);
}
static const struct spa_bt_transport_events transport_events = {
SPA_VERSION_BT_TRANSPORT_EVENTS,
.destroy = transport_destroy,
};
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 (strcmp(type, SPA_TYPE_INTERFACE_Node) == 0)
*interface = &this->node;
else
return -ENOENT;
return 0;
}
static int impl_clear(struct spa_handle *handle)
{
struct impl *this = (struct impl *) handle;
if (this->transport)
spa_hook_remove(&this->transport_listener);
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;
struct port *port;
const char *str;
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->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->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->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);
/* 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.flags = SPA_NODE_FLAG_RT;
this->params[0] = SPA_PARAM_INFO(SPA_PARAM_PropInfo, SPA_PARAM_INFO_READ);
this->params[1] = SPA_PARAM_INFO(SPA_PARAM_Props, SPA_PARAM_INFO_READWRITE);
this->params[2] = SPA_PARAM_INFO(SPA_PARAM_IO, SPA_PARAM_INFO_READ);
this->info.params = this->params;
this->info.n_params = 3;
/* set the port info */
port = &this->port;
port->info_all = SPA_PORT_CHANGE_MASK_FLAGS |
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_TERMINAL;
port->params[0] = SPA_PARAM_INFO(SPA_PARAM_EnumFormat, SPA_PARAM_INFO_READ);
port->params[1] = SPA_PARAM_INFO(SPA_PARAM_Meta, SPA_PARAM_INFO_READ);
port->params[2] = SPA_PARAM_INFO(SPA_PARAM_IO, SPA_PARAM_INFO_READ);
port->params[3] = SPA_PARAM_INFO(SPA_PARAM_Format, SPA_PARAM_INFO_WRITE);
port->params[4] = SPA_PARAM_INFO(SPA_PARAM_Buffers, 0);
port->info.params = port->params;
port->info.n_params = 5;
/* Init the buffer lists */
spa_list_init(&port->ready);
spa_list_init(&port->free);
if (info && (str = spa_dict_lookup(info, SPA_KEY_API_BLUEZ5_TRANSPORT)))
sscanf(str, "pointer:%p", &this->transport);
if (this->transport == NULL) {
spa_log_error(this->log, "a transport is needed");
return -EINVAL;
}
spa_bt_transport_add_listener(this->transport,
&this->transport_listener, &transport_events, this);
return 0;
}
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, "Collabora Ltd. <contact@collabora.com>" },
{ SPA_KEY_FACTORY_DESCRIPTION, "Capture bluetooth audio with hsp/hfp" },
{ SPA_KEY_FACTORY_USAGE, SPA_KEY_API_BLUEZ5_TRANSPORT"=<transport>" },
};
static const struct spa_dict info = SPA_DICT_INIT_ARRAY(info_items);
struct spa_handle_factory spa_sco_source_factory = {
SPA_VERSION_HANDLE_FACTORY,
SPA_NAME_API_BLUEZ5_SCO_SOURCE,
&info,
impl_get_size,
impl_init,
impl_enum_interface_info,
};
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