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pipewire/spa/plugins/volume/volume.c
Wim Taymans d3682067fa node: remove node state 
Remove the node state. The state of the node is based on the state
of the ports, which can be derived directly from calling the port
methods. Track this state in the Port instead.
Add a mixer module that puts a mixer in from of audio sinks. This allows
multiple clients to play on one sink (still has some bugs). do some
fixes in the mixer and the scheduler to make this work.
2017-04-08 20:33:54 +02:00

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/* 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/type-map.h>
#include <spa/node.h>
#include <spa/list.h>
#include <spa/audio/format-utils.h>
#include <spa/format-builder.h>
#include <lib/props.h>
#define MAX_BUFFERS 16
typedef struct _SpaVolume SpaVolume;
typedef struct {
double volume;
bool mute;
} SpaVolumeProps;
typedef struct {
SpaBuffer *outbuf;
bool outstanding;
SpaMetaHeader *h;
void *ptr;
size_t size;
SpaList link;
} SpaVolumeBuffer;
typedef struct {
bool have_format;
SpaPortInfo info;
SpaAllocParam *params[2];
uint8_t params_buffer[1024];
SpaVolumeBuffer buffers[MAX_BUFFERS];
uint32_t n_buffers;
SpaPortIO *io;
SpaList empty;
} SpaVolumePort;
typedef struct {
uint32_t node;
uint32_t format;
uint32_t props;
uint32_t prop_volume;
uint32_t prop_mute;
SpaTypeMediaType media_type;
SpaTypeMediaSubtype media_subtype;
SpaTypeFormatAudio format_audio;
SpaTypeAudioFormat audio_format;
SpaTypeEventNode event_node;
SpaTypeCommandNode command_node;
SpaTypeAllocParamBuffers alloc_param_buffers;
SpaTypeAllocParamMetaEnable alloc_param_meta_enable;
} Type;
static inline void
init_type (Type *type, SpaTypeMap *map)
{
type->node = spa_type_map_get_id (map, SPA_TYPE__Node);
type->format = spa_type_map_get_id (map, SPA_TYPE__Format);
type->props = spa_type_map_get_id (map, SPA_TYPE__Props);
type->prop_volume = spa_type_map_get_id (map, SPA_TYPE_PROPS__volume);
type->prop_mute = spa_type_map_get_id (map, SPA_TYPE_PROPS__mute);
spa_type_media_type_map (map, &type->media_type);
spa_type_media_subtype_map (map, &type->media_subtype);
spa_type_format_audio_map (map, &type->format_audio);
spa_type_audio_format_map (map, &type->audio_format);
spa_type_event_node_map (map, &type->event_node);
spa_type_command_node_map (map, &type->command_node);
spa_type_alloc_param_buffers_map (map, &type->alloc_param_buffers);
spa_type_alloc_param_meta_enable_map (map, &type->alloc_param_meta_enable);
}
struct _SpaVolume {
SpaHandle handle;
SpaNode node;
Type type;
SpaTypeMap *map;
SpaLog *log;
uint8_t props_buffer[512];
SpaVolumeProps props;
SpaEventNodeCallback event_cb;
void *user_data;
uint8_t format_buffer[1024];
SpaAudioInfo current_format;
SpaVolumePort in_ports[1];
SpaVolumePort out_ports[1];
bool started;
};
#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)
#define DEFAULT_VOLUME 1.0
#define DEFAULT_MUTE false
static void
reset_volume_props (SpaVolumeProps *props)
{
props->volume = DEFAULT_VOLUME;
props->mute = DEFAULT_MUTE;
}
#define PROP(f,key,type,...) \
SPA_POD_PROP (f,key,0,type,1,__VA_ARGS__)
#define PROP_MM(f,key,type,...) \
SPA_POD_PROP (f,key,SPA_POD_PROP_RANGE_MIN_MAX,type,3,__VA_ARGS__)
#define PROP_U_MM(f,key,type,...) \
SPA_POD_PROP (f,key,SPA_POD_PROP_FLAG_UNSET | \
SPA_POD_PROP_RANGE_MIN_MAX,type,3,__VA_ARGS__)
#define PROP_U_EN(f,key,type,n,...) \
SPA_POD_PROP (f,key,SPA_POD_PROP_FLAG_UNSET | \
SPA_POD_PROP_RANGE_ENUM,type,n,__VA_ARGS__)
static SpaResult
spa_volume_node_get_props (SpaNode *node,
SpaProps **props)
{
SpaVolume *this;
SpaPODBuilder b = { NULL, };
SpaPODFrame f[2];
spa_return_val_if_fail (node != NULL, SPA_RESULT_INVALID_ARGUMENTS);
spa_return_val_if_fail (props != NULL, SPA_RESULT_INVALID_ARGUMENTS);
this = SPA_CONTAINER_OF (node, SpaVolume, node);
spa_pod_builder_init (&b, this->props_buffer, sizeof (this->props_buffer));
spa_pod_builder_props (&b, &f[0], this->type.props,
PROP_MM (&f[1], this->type.prop_volume, SPA_POD_TYPE_DOUBLE, this->props.volume, 0.0, 10.0),
PROP (&f[1], this->type.prop_mute, SPA_POD_TYPE_BOOL, this->props.mute));
*props = SPA_POD_BUILDER_DEREF (&b, f[0].ref, SpaProps);
return SPA_RESULT_OK;
}
static SpaResult
spa_volume_node_set_props (SpaNode *node,
const SpaProps *props)
{
SpaVolume *this;
spa_return_val_if_fail (node != NULL, SPA_RESULT_INVALID_ARGUMENTS);
this = SPA_CONTAINER_OF (node, SpaVolume, node);
if (props == NULL) {
reset_volume_props (&this->props);
} else {
spa_props_query (props,
this->type.prop_volume, SPA_POD_TYPE_DOUBLE, &this->props.volume,
this->type.prop_mute, SPA_POD_TYPE_BOOL, &this->props.mute,
0);
}
return SPA_RESULT_OK;
}
static SpaResult
spa_volume_node_send_command (SpaNode *node,
SpaCommand *command)
{
SpaVolume *this;
spa_return_val_if_fail (node != NULL, SPA_RESULT_INVALID_ARGUMENTS);
spa_return_val_if_fail (command != NULL, SPA_RESULT_INVALID_ARGUMENTS);
this = SPA_CONTAINER_OF (node, SpaVolume, node);
if (SPA_COMMAND_TYPE (command) == this->type.command_node.Start) {
this->started = true;
}
else if (SPA_COMMAND_TYPE (command) == this->type.command_node.Pause) {
this->started = false;
}
else
return SPA_RESULT_NOT_IMPLEMENTED;
return SPA_RESULT_OK;
}
static SpaResult
spa_volume_node_set_event_callback (SpaNode *node,
SpaEventNodeCallback event,
void *user_data)
{
SpaVolume *this;
spa_return_val_if_fail (node != NULL, 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,
uint32_t *n_input_ports,
uint32_t *max_input_ports,
uint32_t *n_output_ports,
uint32_t *max_output_ports)
{
spa_return_val_if_fail (node != NULL, 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,
uint32_t n_input_ports,
uint32_t *input_ids,
uint32_t n_output_ports,
uint32_t *output_ids)
{
spa_return_val_if_fail (node != NULL, 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,
uint32_t index)
{
SpaVolume *this;
SpaResult res;
SpaFormat *fmt;
uint8_t buffer[1024];
SpaPODBuilder b = { NULL, };
SpaPODFrame f[2];
uint32_t count, match;
spa_return_val_if_fail (node != NULL, SPA_RESULT_INVALID_ARGUMENTS);
spa_return_val_if_fail (format != NULL, SPA_RESULT_INVALID_ARGUMENTS);
this = SPA_CONTAINER_OF (node, SpaVolume, node);
spa_return_val_if_fail (CHECK_PORT (this, direction, port_id), SPA_RESULT_INVALID_PORT);
count = match = filter ? 0 : index;
next:
spa_pod_builder_init (&b, buffer, sizeof (buffer));
switch (count++) {
case 0:
spa_pod_builder_format (&b, &f[0], this->type.format,
this->type.media_type.audio, this->type.media_subtype.raw,
PROP_U_EN (&f[1], this->type.format_audio.format, SPA_POD_TYPE_ID, 3,
this->type.audio_format.S16,
this->type.audio_format.S16,
this->type.audio_format.S32),
PROP_U_MM (&f[1], this->type.format_audio.rate, SPA_POD_TYPE_INT, 44100, 1, INT32_MAX),
PROP_U_MM (&f[1], this->type.format_audio.channels, SPA_POD_TYPE_INT, 2, 1, INT32_MAX));
break;
default:
return SPA_RESULT_ENUM_END;
}
fmt = SPA_POD_BUILDER_DEREF (&b, f[0].ref, SpaFormat);
spa_pod_builder_init (&b, this->format_buffer, sizeof (this->format_buffer));
if ((res = spa_format_filter (fmt, filter, &b)) != SPA_RESULT_OK || match++ != index)
goto next;
*format = SPA_POD_BUILDER_DEREF (&b, 0, SpaFormat);
return SPA_RESULT_OK;
}
static SpaResult
clear_buffers (SpaVolume *this, SpaVolumePort *port)
{
if (port->n_buffers > 0) {
spa_log_info (this->log, "volume %p: clear buffers", this);
port->n_buffers = 0;
spa_list_init (&port->empty);
}
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;
spa_return_val_if_fail (node != NULL, SPA_RESULT_INVALID_ARGUMENTS);
this = SPA_CONTAINER_OF (node, SpaVolume, node);
spa_return_val_if_fail (CHECK_PORT (this, direction, port_id), 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;
clear_buffers (this, port);
} else {
SpaAudioInfo info = { SPA_FORMAT_MEDIA_TYPE (format),
SPA_FORMAT_MEDIA_SUBTYPE (format), };
if (info.media_type != this->type.media_type.audio ||
info.media_subtype != this->type.media_subtype.raw)
return SPA_RESULT_INVALID_MEDIA_TYPE;
if (!spa_format_audio_raw_parse (format, &info.info.raw, &this->type.format_audio))
return SPA_RESULT_INVALID_MEDIA_TYPE;
this->current_format = info;
port->have_format = true;
}
if (port->have_format) {
SpaPODBuilder b = { NULL };
SpaPODFrame f[2];
port->info.maxbuffering = -1;
port->info.latency = 0;
port->info.n_params = 2;
port->info.params = port->params;
spa_pod_builder_init (&b, port->params_buffer, sizeof (port->params_buffer));
spa_pod_builder_object (&b, &f[0], 0, this->type.alloc_param_buffers.Buffers,
PROP (&f[1], this->type.alloc_param_buffers.size, SPA_POD_TYPE_INT, 16),
PROP (&f[1], this->type.alloc_param_buffers.stride, SPA_POD_TYPE_INT, 16),
PROP_U_MM (&f[1], this->type.alloc_param_buffers.buffers, SPA_POD_TYPE_INT, MAX_BUFFERS, 2, MAX_BUFFERS),
PROP (&f[1], this->type.alloc_param_buffers.align, SPA_POD_TYPE_INT, 16));
port->params[0] = SPA_POD_BUILDER_DEREF (&b, f[0].ref, SpaAllocParam);
spa_pod_builder_object (&b, &f[0], 0, this->type.alloc_param_meta_enable.MetaEnable,
PROP (&f[1], this->type.alloc_param_meta_enable.type, SPA_POD_TYPE_INT, SPA_META_TYPE_HEADER));
port->params[1] = SPA_POD_BUILDER_DEREF (&b, f[0].ref, SpaAllocParam);
port->info.extra = NULL;
}
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;
spa_return_val_if_fail (node != NULL, SPA_RESULT_INVALID_ARGUMENTS);
spa_return_val_if_fail (format != NULL, SPA_RESULT_INVALID_ARGUMENTS);
this = SPA_CONTAINER_OF (node, SpaVolume, node);
spa_return_val_if_fail (CHECK_PORT (this, direction, port_id), 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 = NULL;
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;
spa_return_val_if_fail (node != NULL, SPA_RESULT_INVALID_ARGUMENTS);
spa_return_val_if_fail (info != NULL, SPA_RESULT_INVALID_ARGUMENTS);
this = SPA_CONTAINER_OF (node, SpaVolume, node);
spa_return_val_if_fail (CHECK_PORT (this, direction, port_id), 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)
{
SpaVolume *this;
SpaVolumePort *port;
uint32_t i;
spa_return_val_if_fail (node != NULL, SPA_RESULT_INVALID_ARGUMENTS);
this = SPA_CONTAINER_OF (node, SpaVolume, node);
spa_return_val_if_fail (CHECK_PORT (this, direction, port_id), 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;
clear_buffers (this, port);
for (i = 0; i < n_buffers; i++) {
SpaVolumeBuffer *b;
SpaData *d = buffers[i]->datas;
b = &port->buffers[i];
b->outbuf = buffers[i];
b->outstanding = true;
b->h = spa_buffer_find_meta (buffers[i], SPA_META_TYPE_HEADER);
switch (d[0].type) {
case SPA_DATA_TYPE_MEMPTR:
case SPA_DATA_TYPE_MEMFD:
case SPA_DATA_TYPE_DMABUF:
if (d[0].data == NULL) {
spa_log_error (this->log, "volume %p: invalid memory on buffer %p", this, buffers[i]);
continue;
}
b->ptr = d[0].data;
b->size = d[0].maxsize;
break;
default:
break;
}
spa_list_insert (port->empty.prev, &b->link);
}
port->n_buffers = n_buffers;
return SPA_RESULT_OK;
}
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_io (SpaNode *node,
SpaDirection direction,
uint32_t port_id,
SpaPortIO *io)
{
SpaVolume *this;
SpaVolumePort *port;
spa_return_val_if_fail (node != NULL, SPA_RESULT_INVALID_ARGUMENTS);
this = SPA_CONTAINER_OF (node, SpaVolume, node);
spa_return_val_if_fail (CHECK_PORT (this, direction, port_id), SPA_RESULT_INVALID_PORT);
port = direction == SPA_DIRECTION_INPUT ? &this->in_ports[port_id] : &this->out_ports[port_id];
port->io = io;
return SPA_RESULT_OK;
}
static SpaResult
spa_volume_node_port_reuse_buffer (SpaNode *node,
uint32_t port_id,
uint32_t buffer_id)
{
SpaVolume *this;
SpaVolumeBuffer *b;
SpaVolumePort *port;
spa_return_val_if_fail (node != NULL, SPA_RESULT_INVALID_ARGUMENTS);
this = SPA_CONTAINER_OF (node, SpaVolume, node);
spa_return_val_if_fail (CHECK_PORT (this, SPA_DIRECTION_OUTPUT, port_id), SPA_RESULT_INVALID_PORT);
port = &this->out_ports[port_id];
if (port->n_buffers == 0)
return SPA_RESULT_NO_BUFFERS;
if (buffer_id >= port->n_buffers)
return SPA_RESULT_INVALID_BUFFER_ID;
b = &port->buffers[buffer_id];
if (!b->outstanding)
return SPA_RESULT_OK;
b->outstanding = false;
spa_list_insert (port->empty.prev, &b->link);
return SPA_RESULT_OK;
}
static SpaResult
spa_volume_node_port_send_command (SpaNode *node,
SpaDirection direction,
uint32_t port_id,
SpaCommand *command)
{
return SPA_RESULT_NOT_IMPLEMENTED;
}
static SpaBuffer *
find_free_buffer (SpaVolume *this, SpaVolumePort *port)
{
SpaVolumeBuffer *b;
if (spa_list_is_empty (&port->empty))
return NULL;
b = spa_list_first (&port->empty, SpaVolumeBuffer, link);
spa_list_remove (&b->link);
b->outstanding = true;
return b->outbuf;
}
static void
release_buffer (SpaVolume *this, SpaBuffer *buffer)
{
SpaEventNodeReuseBuffer rb = SPA_EVENT_NODE_REUSE_BUFFER_INIT (this->type.event_node.ReuseBuffer,
0, buffer->id);
this->event_cb (&this->node, (SpaEvent *)&rb, this->user_data);
}
static void
do_volume (SpaVolume *this, SpaBuffer *dbuf, SpaBuffer *sbuf)
{
uint32_t si, di, i, n_samples, n_bytes, soff, doff ;
SpaData *sd, *dd;
uint16_t *src, *dst;
double volume;
volume = this->props.volume;
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->chunk->offset + soff);
dst = (uint16_t*) ((uint8_t*)dd->data + dd->chunk->offset + doff);
n_bytes = SPA_MIN (sd->chunk->size - soff, dd->chunk->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->chunk->size) {
si++;
soff = 0;
}
if (doff >= dd->chunk->size) {
di++;
doff = 0;
}
}
}
static SpaResult
spa_volume_node_process_input (SpaNode *node)
{
SpaVolume *this;
SpaPortIO *input;
SpaPortIO *output;
SpaVolumePort *in_port, *out_port;
SpaBuffer *dbuf, *sbuf;
spa_return_val_if_fail (node != NULL, SPA_RESULT_INVALID_ARGUMENTS);
this = SPA_CONTAINER_OF (node, SpaVolume, node);
in_port = &this->in_ports[0];
out_port = &this->out_ports[0];
if ((input = in_port->io) == NULL)
return SPA_RESULT_ERROR;
if ((output = out_port->io) == NULL)
return SPA_RESULT_ERROR;
if (!in_port->have_format) {
input->status = SPA_RESULT_NO_FORMAT;
return SPA_RESULT_ERROR;
}
if (input->buffer_id >= in_port->n_buffers) {
input->status = SPA_RESULT_INVALID_BUFFER_ID;
return SPA_RESULT_ERROR;
}
if (output->buffer_id >= out_port->n_buffers) {
dbuf = find_free_buffer (this, out_port);
} else {
dbuf = out_port->buffers[output->buffer_id].outbuf;
}
if (dbuf == NULL)
return SPA_RESULT_OUT_OF_BUFFERS;
sbuf = in_port->buffers[input->buffer_id].outbuf;
input->buffer_id = SPA_ID_INVALID;
input->status = SPA_RESULT_OK;
do_volume (this, sbuf, dbuf);
output->buffer_id = dbuf->id;
output->status = SPA_RESULT_OK;
if (sbuf != dbuf)
release_buffer (this, sbuf);
return SPA_RESULT_HAVE_OUTPUT;
}
static SpaResult
spa_volume_node_process_output (SpaNode *node)
{
return SPA_RESULT_NEED_INPUT;
}
static const SpaNode volume_node = {
sizeof (SpaNode),
NULL,
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_io,
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;
spa_return_val_if_fail (handle != NULL, SPA_RESULT_INVALID_ARGUMENTS);
spa_return_val_if_fail (interface != NULL, SPA_RESULT_INVALID_ARGUMENTS);
this = (SpaVolume *) handle;
if (interface_id == this->type.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,
uint32_t n_support)
{
SpaVolume *this;
uint32_t i;
spa_return_val_if_fail (factory != NULL, SPA_RESULT_INVALID_ARGUMENTS);
spa_return_val_if_fail (handle != NULL, 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].type, SPA_TYPE__TypeMap) == 0)
this->map = support[i].data;
else if (strcmp (support[i].type, SPA_TYPE__Log) == 0)
this->log = support[i].data;
}
if (this->map == NULL) {
spa_log_error (this->log, "a type-map is needed");
return SPA_RESULT_ERROR;
}
init_type (&this->type, this->map);
this->node = volume_node;
reset_volume_props (&this->props);
this->in_ports[0].info.flags = SPA_PORT_INFO_FLAG_CAN_USE_BUFFERS |
SPA_PORT_INFO_FLAG_IN_PLACE;
spa_list_init (&this->in_ports[0].empty);
this->out_ports[0].info.flags = SPA_PORT_INFO_FLAG_CAN_USE_BUFFERS |
SPA_PORT_INFO_FLAG_NO_REF;
spa_list_init (&this->out_ports[0].empty);
return SPA_RESULT_OK;
}
static const SpaInterfaceInfo volume_interfaces[] =
{
{ SPA_TYPE__Node, },
};
static SpaResult
volume_enum_interface_info (const SpaHandleFactory *factory,
const SpaInterfaceInfo **info,
uint32_t index)
{
spa_return_val_if_fail (factory != NULL, SPA_RESULT_INVALID_ARGUMENTS);
spa_return_val_if_fail (info != NULL, SPA_RESULT_INVALID_ARGUMENTS);
switch (index) {
case 0:
*info = &volume_interfaces[index];
break;
default:
return SPA_RESULT_ENUM_END;
}
return SPA_RESULT_OK;
}
const SpaHandleFactory spa_volume_factory =
{ "volume",
NULL,
sizeof (SpaVolume),
volume_init,
volume_enum_interface_info,
};
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