mirror of
https://gitlab.freedesktop.org/pipewire/pipewire.git
synced 2025-10-31 22:25:38 -04:00
e88a376d7c
We can optimize the transport some more if we allow the host to configure the area used for transfering buffers. We can then also place the current status in the area and avoid calling get_status(). We can also allocate this area in shared memory, avoiding a memcpy in the client-node.
752 lines
19 KiB
C
752 lines
19 KiB
C
/* Spa
|
|
* Copyright (C) 2016 Wim Taymans <wim.taymans@gmail.com>
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Library General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2 of the License, or (at your option) any later version.
|
|
*
|
|
* This library is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Library General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Library General Public
|
|
* License along with this library; if not, write to the
|
|
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
|
|
* Boston, MA 02110-1301, USA.
|
|
*/
|
|
|
|
#include <string.h>
|
|
#include <stddef.h>
|
|
|
|
#include <spa/log.h>
|
|
#include <spa/id-map.h>
|
|
#include <spa/node.h>
|
|
#include <spa/audio/format.h>
|
|
#include <lib/props.h>
|
|
|
|
typedef struct _SpaVolume SpaVolume;
|
|
|
|
typedef struct {
|
|
SpaProps props;
|
|
double volume;
|
|
bool mute;
|
|
} SpaVolumeProps;
|
|
|
|
typedef struct {
|
|
bool have_format;
|
|
SpaPortInfo info;
|
|
SpaBuffer **buffers;
|
|
unsigned int n_buffers;
|
|
SpaBuffer *buffer;
|
|
void *io;
|
|
} SpaVolumePort;
|
|
|
|
typedef struct {
|
|
uint32_t node;
|
|
} URI;
|
|
|
|
struct _SpaVolume {
|
|
SpaHandle handle;
|
|
SpaNode node;
|
|
|
|
URI uri;
|
|
SpaIDMap *map;
|
|
SpaLog *log;
|
|
|
|
SpaVolumeProps props[2];
|
|
|
|
SpaNodeEventCallback event_cb;
|
|
void *user_data;
|
|
|
|
bool have_format;
|
|
SpaFormatAudio query_format;
|
|
SpaFormatAudio current_format;
|
|
|
|
SpaVolumePort in_ports[1];
|
|
SpaVolumePort out_ports[1];
|
|
};
|
|
|
|
#define CHECK_IN_PORT(this,d,p) ((d) == SPA_DIRECTION_INPUT && (p) == 0)
|
|
#define CHECK_OUT_PORT(this,d,p) ((d) == SPA_DIRECTION_OUTPUT && (p) == 0)
|
|
#define CHECK_PORT(this,d,p) ((p) == 0)
|
|
|
|
static const double default_volume = 1.0;
|
|
static const double min_volume = 0.0;
|
|
static const double max_volume = 10.0;
|
|
static const bool default_mute = false;
|
|
|
|
static const SpaPropRangeInfo volume_range[] = {
|
|
{ "min", { sizeof (double), &min_volume } },
|
|
{ "max", { sizeof (double), &max_volume } },
|
|
};
|
|
|
|
enum {
|
|
PROP_ID_VOLUME,
|
|
PROP_ID_MUTE,
|
|
PROP_ID_LAST,
|
|
};
|
|
|
|
static const SpaPropInfo prop_info[] =
|
|
{
|
|
{ PROP_ID_VOLUME, offsetof (SpaVolumeProps, volume),
|
|
"volume",
|
|
SPA_PROP_FLAG_READWRITE,
|
|
SPA_PROP_TYPE_DOUBLE, sizeof (double),
|
|
SPA_PROP_RANGE_TYPE_MIN_MAX, 2, volume_range,
|
|
NULL },
|
|
{ PROP_ID_MUTE, offsetof (SpaVolumeProps, mute),
|
|
"mute",
|
|
SPA_PROP_FLAG_READWRITE,
|
|
SPA_PROP_TYPE_BOOL, sizeof (bool),
|
|
SPA_PROP_RANGE_TYPE_NONE, 0, NULL,
|
|
NULL },
|
|
};
|
|
|
|
static void
|
|
reset_volume_props (SpaVolumeProps *props)
|
|
{
|
|
props->volume = default_volume;
|
|
props->mute = default_mute;
|
|
}
|
|
|
|
static void
|
|
update_state (SpaVolume *this, SpaNodeState state)
|
|
{
|
|
this->node.state = state;
|
|
}
|
|
|
|
static SpaResult
|
|
spa_volume_node_get_props (SpaNode *node,
|
|
SpaProps **props)
|
|
{
|
|
SpaVolume *this;
|
|
|
|
if (node == NULL || props == NULL)
|
|
return SPA_RESULT_INVALID_ARGUMENTS;
|
|
|
|
this = SPA_CONTAINER_OF (node, SpaVolume, node);
|
|
|
|
memcpy (&this->props[0], &this->props[1], sizeof (this->props[1]));
|
|
*props = &this->props[0].props;
|
|
|
|
return SPA_RESULT_OK;
|
|
}
|
|
|
|
static SpaResult
|
|
spa_volume_node_set_props (SpaNode *node,
|
|
const SpaProps *props)
|
|
{
|
|
SpaVolume *this;
|
|
SpaVolumeProps *p;
|
|
SpaResult res;
|
|
|
|
if (node == NULL)
|
|
return SPA_RESULT_INVALID_ARGUMENTS;
|
|
|
|
this = SPA_CONTAINER_OF (node, SpaVolume, node);
|
|
p = &this->props[1];
|
|
|
|
if (props == NULL) {
|
|
reset_volume_props (p);
|
|
return SPA_RESULT_OK;
|
|
}
|
|
res = spa_props_copy_values (props, &p->props);
|
|
|
|
return res;
|
|
}
|
|
|
|
static SpaResult
|
|
spa_volume_node_send_command (SpaNode *node,
|
|
SpaNodeCommand *command)
|
|
{
|
|
SpaVolume *this;
|
|
|
|
if (node == NULL || command == NULL)
|
|
return SPA_RESULT_INVALID_ARGUMENTS;
|
|
|
|
this = SPA_CONTAINER_OF (node, SpaVolume, node);
|
|
|
|
switch (command->type) {
|
|
case SPA_NODE_COMMAND_INVALID:
|
|
return SPA_RESULT_INVALID_COMMAND;
|
|
|
|
case SPA_NODE_COMMAND_START:
|
|
update_state (this, SPA_NODE_STATE_STREAMING);
|
|
break;
|
|
|
|
case SPA_NODE_COMMAND_PAUSE:
|
|
update_state (this, SPA_NODE_STATE_PAUSED);
|
|
break;
|
|
|
|
case SPA_NODE_COMMAND_FLUSH:
|
|
case SPA_NODE_COMMAND_DRAIN:
|
|
case SPA_NODE_COMMAND_MARKER:
|
|
case SPA_NODE_COMMAND_CLOCK_UPDATE:
|
|
return SPA_RESULT_NOT_IMPLEMENTED;
|
|
}
|
|
return SPA_RESULT_OK;
|
|
}
|
|
|
|
static SpaResult
|
|
spa_volume_node_set_event_callback (SpaNode *node,
|
|
SpaNodeEventCallback event,
|
|
void *user_data)
|
|
{
|
|
SpaVolume *this;
|
|
|
|
if (node == NULL)
|
|
return SPA_RESULT_INVALID_ARGUMENTS;
|
|
|
|
this = SPA_CONTAINER_OF (node, SpaVolume, node);
|
|
|
|
this->event_cb = event;
|
|
this->user_data = user_data;
|
|
|
|
return SPA_RESULT_OK;
|
|
}
|
|
|
|
static SpaResult
|
|
spa_volume_node_get_n_ports (SpaNode *node,
|
|
unsigned int *n_input_ports,
|
|
unsigned int *max_input_ports,
|
|
unsigned int *n_output_ports,
|
|
unsigned int *max_output_ports)
|
|
{
|
|
if (node == NULL)
|
|
return SPA_RESULT_INVALID_ARGUMENTS;
|
|
|
|
if (n_input_ports)
|
|
*n_input_ports = 1;
|
|
if (max_input_ports)
|
|
*max_input_ports = 1;
|
|
if (n_output_ports)
|
|
*n_output_ports = 1;
|
|
if (max_output_ports)
|
|
*max_output_ports = 1;
|
|
|
|
return SPA_RESULT_OK;
|
|
}
|
|
|
|
static SpaResult
|
|
spa_volume_node_get_port_ids (SpaNode *node,
|
|
unsigned int n_input_ports,
|
|
uint32_t *input_ids,
|
|
unsigned int n_output_ports,
|
|
uint32_t *output_ids)
|
|
{
|
|
if (node == NULL)
|
|
return SPA_RESULT_INVALID_ARGUMENTS;
|
|
|
|
if (n_input_ports > 0 && input_ids)
|
|
input_ids[0] = 0;
|
|
if (n_output_ports > 0 && output_ids)
|
|
output_ids[0] = 0;
|
|
|
|
return SPA_RESULT_OK;
|
|
}
|
|
|
|
|
|
static SpaResult
|
|
spa_volume_node_add_port (SpaNode *node,
|
|
SpaDirection direction,
|
|
uint32_t port_id)
|
|
{
|
|
return SPA_RESULT_NOT_IMPLEMENTED;
|
|
}
|
|
|
|
static SpaResult
|
|
spa_volume_node_remove_port (SpaNode *node,
|
|
SpaDirection direction,
|
|
uint32_t port_id)
|
|
{
|
|
return SPA_RESULT_NOT_IMPLEMENTED;
|
|
}
|
|
|
|
static SpaResult
|
|
spa_volume_node_port_enum_formats (SpaNode *node,
|
|
SpaDirection direction,
|
|
uint32_t port_id,
|
|
SpaFormat **format,
|
|
const SpaFormat *filter,
|
|
void **state)
|
|
{
|
|
SpaVolume *this;
|
|
int index;
|
|
|
|
if (node == NULL || format == NULL || state == NULL)
|
|
return SPA_RESULT_INVALID_ARGUMENTS;
|
|
|
|
this = SPA_CONTAINER_OF (node, SpaVolume, node);
|
|
|
|
if (!CHECK_PORT (this, direction, port_id))
|
|
return SPA_RESULT_INVALID_PORT;
|
|
|
|
index = (*state == NULL ? 0 : *(int*)state);
|
|
|
|
switch (index) {
|
|
case 0:
|
|
spa_format_audio_init (SPA_MEDIA_TYPE_AUDIO,
|
|
SPA_MEDIA_SUBTYPE_RAW,
|
|
&this->query_format);
|
|
break;
|
|
default:
|
|
return SPA_RESULT_ENUM_END;
|
|
}
|
|
*format = &this->query_format.format;
|
|
*(int*)state = ++index;
|
|
|
|
return SPA_RESULT_OK;
|
|
}
|
|
|
|
static SpaResult
|
|
spa_volume_node_port_set_format (SpaNode *node,
|
|
SpaDirection direction,
|
|
uint32_t port_id,
|
|
SpaPortFormatFlags flags,
|
|
const SpaFormat *format)
|
|
{
|
|
SpaVolume *this;
|
|
SpaVolumePort *port;
|
|
SpaResult res;
|
|
|
|
if (node == NULL || format == NULL)
|
|
return SPA_RESULT_INVALID_ARGUMENTS;
|
|
|
|
this = SPA_CONTAINER_OF (node, SpaVolume, node);
|
|
|
|
if (!CHECK_PORT (this, direction, port_id))
|
|
return SPA_RESULT_INVALID_PORT;
|
|
|
|
port = direction == SPA_DIRECTION_INPUT ? &this->in_ports[port_id] : &this->out_ports[port_id];
|
|
|
|
if (format == NULL) {
|
|
port->have_format = false;
|
|
return SPA_RESULT_OK;
|
|
}
|
|
|
|
if ((res = spa_format_audio_parse (format, &this->current_format)) < 0)
|
|
return res;
|
|
|
|
port->have_format = true;
|
|
|
|
return SPA_RESULT_OK;
|
|
}
|
|
|
|
static SpaResult
|
|
spa_volume_node_port_get_format (SpaNode *node,
|
|
SpaDirection direction,
|
|
uint32_t port_id,
|
|
const SpaFormat **format)
|
|
{
|
|
SpaVolume *this;
|
|
SpaVolumePort *port;
|
|
|
|
if (node == NULL || format == NULL)
|
|
return SPA_RESULT_INVALID_ARGUMENTS;
|
|
|
|
this = SPA_CONTAINER_OF (node, SpaVolume, node);
|
|
|
|
if (!CHECK_PORT (this, direction, port_id))
|
|
return SPA_RESULT_INVALID_PORT;
|
|
|
|
port = direction == SPA_DIRECTION_INPUT ? &this->in_ports[port_id] : &this->out_ports[port_id];
|
|
|
|
if (!port->have_format)
|
|
return SPA_RESULT_NO_FORMAT;
|
|
|
|
*format = &this->current_format.format;
|
|
|
|
return SPA_RESULT_OK;
|
|
}
|
|
|
|
static SpaResult
|
|
spa_volume_node_port_get_info (SpaNode *node,
|
|
SpaDirection direction,
|
|
uint32_t port_id,
|
|
const SpaPortInfo **info)
|
|
{
|
|
SpaVolume *this;
|
|
SpaVolumePort *port;
|
|
|
|
if (node == NULL || info == NULL)
|
|
return SPA_RESULT_INVALID_ARGUMENTS;
|
|
|
|
this = SPA_CONTAINER_OF (node, SpaVolume, node);
|
|
|
|
if (!CHECK_PORT (this, direction, port_id))
|
|
return SPA_RESULT_INVALID_PORT;
|
|
|
|
port = direction == SPA_DIRECTION_INPUT ? &this->in_ports[port_id] : &this->out_ports[port_id];
|
|
*info = &port->info;
|
|
|
|
return SPA_RESULT_OK;
|
|
}
|
|
|
|
static SpaResult
|
|
spa_volume_node_port_get_props (SpaNode *node,
|
|
SpaDirection direction,
|
|
uint32_t port_id,
|
|
SpaProps **props)
|
|
{
|
|
return SPA_RESULT_NOT_IMPLEMENTED;
|
|
}
|
|
|
|
static SpaResult
|
|
spa_volume_node_port_set_props (SpaNode *node,
|
|
SpaDirection direction,
|
|
uint32_t port_id,
|
|
const SpaProps *props)
|
|
{
|
|
return SPA_RESULT_NOT_IMPLEMENTED;
|
|
}
|
|
|
|
static SpaResult
|
|
spa_volume_node_port_use_buffers (SpaNode *node,
|
|
SpaDirection direction,
|
|
uint32_t port_id,
|
|
SpaBuffer **buffers,
|
|
uint32_t n_buffers)
|
|
{
|
|
return SPA_RESULT_NOT_IMPLEMENTED;
|
|
}
|
|
|
|
static SpaResult
|
|
spa_volume_node_port_alloc_buffers (SpaNode *node,
|
|
SpaDirection direction,
|
|
uint32_t port_id,
|
|
SpaAllocParam **params,
|
|
uint32_t n_params,
|
|
SpaBuffer **buffers,
|
|
uint32_t *n_buffers)
|
|
{
|
|
return SPA_RESULT_NOT_IMPLEMENTED;
|
|
}
|
|
|
|
static SpaResult
|
|
spa_volume_node_port_set_input (SpaNode *node,
|
|
uint32_t port_id,
|
|
SpaPortInput *input)
|
|
{
|
|
SpaVolume *this;
|
|
|
|
if (node == NULL)
|
|
return SPA_RESULT_INVALID_ARGUMENTS;
|
|
|
|
this = SPA_CONTAINER_OF (node, SpaVolume, node);
|
|
|
|
if (!CHECK_PORT (this, SPA_DIRECTION_INPUT, port_id))
|
|
return SPA_RESULT_INVALID_PORT;
|
|
|
|
this->in_ports[port_id].io = input;
|
|
|
|
return SPA_RESULT_OK;
|
|
}
|
|
|
|
static SpaResult
|
|
spa_volume_node_port_set_output (SpaNode *node,
|
|
uint32_t port_id,
|
|
SpaPortOutput *output)
|
|
{
|
|
SpaVolume *this;
|
|
|
|
if (node == NULL)
|
|
return SPA_RESULT_INVALID_ARGUMENTS;
|
|
|
|
this = SPA_CONTAINER_OF (node, SpaVolume, node);
|
|
|
|
if (!CHECK_PORT (this, SPA_DIRECTION_OUTPUT, port_id))
|
|
return SPA_RESULT_INVALID_PORT;
|
|
|
|
this->in_ports[port_id].io = output;
|
|
|
|
return SPA_RESULT_OK;
|
|
}
|
|
|
|
static SpaResult
|
|
spa_volume_node_port_reuse_buffer (SpaNode *node,
|
|
uint32_t port_id,
|
|
uint32_t buffer_id)
|
|
{
|
|
return SPA_RESULT_NOT_IMPLEMENTED;
|
|
}
|
|
|
|
static SpaResult
|
|
spa_volume_node_port_send_command (SpaNode *node,
|
|
SpaDirection direction,
|
|
uint32_t port_id,
|
|
SpaNodeCommand *command)
|
|
{
|
|
return SPA_RESULT_NOT_IMPLEMENTED;
|
|
}
|
|
|
|
static SpaResult
|
|
spa_volume_node_process_input (SpaNode *node)
|
|
{
|
|
SpaVolume *this;
|
|
SpaPortInput *input;
|
|
SpaPortOutput *output;
|
|
SpaVolumePort *port;
|
|
|
|
if (node == NULL)
|
|
return SPA_RESULT_INVALID_ARGUMENTS;
|
|
|
|
this = SPA_CONTAINER_OF (node, SpaVolume, node);
|
|
|
|
port = &this->in_ports[0];
|
|
|
|
if ((input = port->io) == NULL)
|
|
return SPA_RESULT_ERROR;
|
|
if ((output = this->out_ports[0].io) == NULL)
|
|
return SPA_RESULT_ERROR;
|
|
|
|
if (input->buffer_id >= port->n_buffers) {
|
|
input->status = SPA_RESULT_INVALID_BUFFER_ID;
|
|
return SPA_RESULT_ERROR;
|
|
}
|
|
if (!port->have_format) {
|
|
input->status = SPA_RESULT_NO_FORMAT;
|
|
return SPA_RESULT_ERROR;
|
|
}
|
|
port->buffer = port->buffers[input->buffer_id];
|
|
|
|
input->status = SPA_RESULT_HAVE_ENOUGH_INPUT;
|
|
input->flags &= ~SPA_PORT_STATUS_FLAG_NEED_INPUT;
|
|
output->flags |= SPA_PORT_STATUS_FLAG_HAVE_OUTPUT;
|
|
|
|
return SPA_RESULT_HAVE_ENOUGH_INPUT;
|
|
}
|
|
|
|
static SpaBuffer *
|
|
find_free_buffer (SpaVolume *this, SpaVolumePort *port)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
static void
|
|
release_buffer (SpaVolume *this, SpaBuffer *buffer)
|
|
{
|
|
SpaNodeEventReuseBuffer rb;
|
|
|
|
rb.event.type = SPA_NODE_EVENT_TYPE_REUSE_BUFFER;
|
|
rb.event.size = sizeof (rb);
|
|
rb.port_id = 0;
|
|
rb.buffer_id = buffer->id;
|
|
this->event_cb (&this->node, &rb.event, this->user_data);
|
|
}
|
|
|
|
static SpaResult
|
|
spa_volume_node_process_output (SpaNode *node)
|
|
{
|
|
SpaVolume *this;
|
|
SpaVolumePort *port;
|
|
unsigned int si, di, i, n_samples, n_bytes, soff, doff ;
|
|
SpaBuffer *sbuf, *dbuf;
|
|
SpaData *sd, *dd;
|
|
uint16_t *src, *dst;
|
|
double volume;
|
|
SpaPortInput *input;
|
|
SpaPortInput *output;
|
|
|
|
if (node == NULL)
|
|
return SPA_RESULT_INVALID_ARGUMENTS;
|
|
|
|
this = SPA_CONTAINER_OF (node, SpaVolume, node);
|
|
|
|
port = &this->out_ports[0];
|
|
|
|
if ((output = port->io) == NULL)
|
|
return SPA_RESULT_ERROR;
|
|
if ((input = this->in_ports[0].io) == NULL)
|
|
return SPA_RESULT_ERROR;
|
|
|
|
if (!port->have_format)
|
|
return SPA_RESULT_NO_FORMAT;
|
|
|
|
if (this->in_ports[0].buffer == NULL)
|
|
return SPA_RESULT_NEED_MORE_INPUT;
|
|
|
|
volume = this->props[1].volume;
|
|
|
|
sbuf = this->in_ports[0].buffer;
|
|
dbuf = find_free_buffer (this, port);
|
|
|
|
si = di = 0;
|
|
soff = doff = 0;
|
|
|
|
while (true) {
|
|
if (si == sbuf->n_datas || di == dbuf->n_datas)
|
|
break;
|
|
|
|
sd = &sbuf->datas[si];
|
|
dd = &dbuf->datas[di];
|
|
|
|
src = (uint16_t*) ((uint8_t*)sd->data + sd->offset + soff);
|
|
dst = (uint16_t*) ((uint8_t*)dd->data + dd->offset + doff);
|
|
|
|
n_bytes = SPA_MIN (sd->size - soff, dd->size - doff);
|
|
n_samples = n_bytes / sizeof (uint16_t);
|
|
|
|
for (i = 0; i < n_samples; i++)
|
|
*src++ = *dst++ * volume;
|
|
|
|
soff += n_bytes;
|
|
doff += n_bytes;
|
|
|
|
if (soff >= sd->size) {
|
|
si++;
|
|
soff = 0;
|
|
}
|
|
if (doff >= dd->size) {
|
|
di++;
|
|
doff = 0;
|
|
}
|
|
}
|
|
if (sbuf != dbuf)
|
|
release_buffer (this, sbuf);
|
|
|
|
this->in_ports[0].buffer = NULL;
|
|
output->buffer_id = dbuf->id;
|
|
output->status = SPA_RESULT_OK;
|
|
|
|
input->flags |= SPA_PORT_STATUS_FLAG_NEED_INPUT;
|
|
output->flags &= ~SPA_PORT_STATUS_FLAG_HAVE_OUTPUT;
|
|
|
|
return SPA_RESULT_OK;
|
|
}
|
|
|
|
static const SpaNode volume_node = {
|
|
sizeof (SpaNode),
|
|
NULL,
|
|
SPA_NODE_STATE_INIT,
|
|
spa_volume_node_get_props,
|
|
spa_volume_node_set_props,
|
|
spa_volume_node_send_command,
|
|
spa_volume_node_set_event_callback,
|
|
spa_volume_node_get_n_ports,
|
|
spa_volume_node_get_port_ids,
|
|
spa_volume_node_add_port,
|
|
spa_volume_node_remove_port,
|
|
spa_volume_node_port_enum_formats,
|
|
spa_volume_node_port_set_format,
|
|
spa_volume_node_port_get_format,
|
|
spa_volume_node_port_get_info,
|
|
spa_volume_node_port_get_props,
|
|
spa_volume_node_port_set_props,
|
|
spa_volume_node_port_use_buffers,
|
|
spa_volume_node_port_alloc_buffers,
|
|
spa_volume_node_port_set_input,
|
|
spa_volume_node_port_set_output,
|
|
spa_volume_node_port_reuse_buffer,
|
|
spa_volume_node_port_send_command,
|
|
spa_volume_node_process_input,
|
|
spa_volume_node_process_output,
|
|
};
|
|
|
|
static SpaResult
|
|
spa_volume_get_interface (SpaHandle *handle,
|
|
uint32_t interface_id,
|
|
void **interface)
|
|
{
|
|
SpaVolume *this;
|
|
|
|
if (handle == NULL || interface == 0)
|
|
return SPA_RESULT_INVALID_ARGUMENTS;
|
|
|
|
this = (SpaVolume *) handle;
|
|
|
|
if (interface_id == this->uri.node)
|
|
*interface = &this->node;
|
|
else
|
|
return SPA_RESULT_UNKNOWN_INTERFACE;
|
|
|
|
return SPA_RESULT_OK;
|
|
}
|
|
|
|
static SpaResult
|
|
volume_clear (SpaHandle *handle)
|
|
{
|
|
return SPA_RESULT_OK;
|
|
}
|
|
|
|
static SpaResult
|
|
volume_init (const SpaHandleFactory *factory,
|
|
SpaHandle *handle,
|
|
const SpaDict *info,
|
|
const SpaSupport *support,
|
|
unsigned int n_support)
|
|
{
|
|
SpaVolume *this;
|
|
unsigned int i;
|
|
|
|
if (factory == NULL || handle == NULL)
|
|
return SPA_RESULT_INVALID_ARGUMENTS;
|
|
|
|
handle->get_interface = spa_volume_get_interface;
|
|
handle->clear = volume_clear;
|
|
|
|
this = (SpaVolume *) handle;
|
|
|
|
for (i = 0; i < n_support; i++) {
|
|
if (strcmp (support[i].uri, SPA_ID_MAP_URI) == 0)
|
|
this->map = support[i].data;
|
|
else if (strcmp (support[i].uri, SPA_LOG_URI) == 0)
|
|
this->log = support[i].data;
|
|
}
|
|
if (this->map == NULL) {
|
|
spa_log_error (this->log, "an id-map is needed");
|
|
return SPA_RESULT_ERROR;
|
|
}
|
|
this->uri.node = spa_id_map_get_id (this->map, SPA_NODE_URI);
|
|
|
|
this->node = volume_node;
|
|
this->props[1].props.n_prop_info = PROP_ID_LAST;
|
|
this->props[1].props.prop_info = prop_info;
|
|
reset_volume_props (&this->props[1]);
|
|
|
|
this->in_ports[0].info.flags = SPA_PORT_INFO_FLAG_CAN_USE_BUFFERS |
|
|
SPA_PORT_INFO_FLAG_IN_PLACE;
|
|
this->out_ports[0].info.flags = SPA_PORT_INFO_FLAG_CAN_ALLOC_BUFFERS |
|
|
SPA_PORT_INFO_FLAG_CAN_USE_BUFFERS |
|
|
SPA_PORT_INFO_FLAG_NO_REF;
|
|
|
|
return SPA_RESULT_OK;
|
|
}
|
|
|
|
static const SpaInterfaceInfo volume_interfaces[] =
|
|
{
|
|
{ SPA_NODE_URI, },
|
|
};
|
|
|
|
static SpaResult
|
|
volume_enum_interface_info (const SpaHandleFactory *factory,
|
|
const SpaInterfaceInfo **info,
|
|
void **state)
|
|
{
|
|
int index;
|
|
|
|
if (factory == NULL || info == NULL || state == NULL)
|
|
return SPA_RESULT_INVALID_ARGUMENTS;
|
|
|
|
index = (*state == NULL ? 0 : *(int*)state);
|
|
|
|
switch (index) {
|
|
case 0:
|
|
*info = &volume_interfaces[index];
|
|
break;
|
|
default:
|
|
return SPA_RESULT_ENUM_END;
|
|
}
|
|
*(int*)state = ++index;
|
|
|
|
return SPA_RESULT_OK;
|
|
}
|
|
|
|
const SpaHandleFactory spa_volume_factory =
|
|
{ "volume",
|
|
NULL,
|
|
sizeof (SpaVolume),
|
|
volume_init,
|
|
volume_enum_interface_info,
|
|
};
|