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filter: add filter API

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The filter API is meant for making generic audio and video filters.
It's like a pw_stream but with many in/out ports and no conversion.
Eventually the pw_stream will be implemented with the filter.

Add some example audio and video filters.
This commit is contained in:
Wim Taymans 2019-10-29 11:59:58 +01:00
parent f7d32e78f2
commit b4b69473d3
9 changed files with 2362 additions and 3 deletions
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36
src/pipewire/private.h
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@ -39,6 +39,7 @@ extern "C" {
#include "pipewire/introspect.h"
#include "pipewire/interfaces.h"
#include "pipewire/stream.h"
#include "pipewire/filter.h"
#include "pipewire/log.h"
#include <spa/support/plugin.h>
@ -733,6 +734,7 @@ struct pw_remote {
struct pw_client_proxy *client_proxy; /**< proxy for the client object */
struct spa_list stream_list; /**< list of \ref pw_stream objects */
struct spa_list filter_list; /**< list of \ref pw_stream objects */
struct pw_protocol_client *conn; /**< the protocol client connection */
int recv_seq; /**< last received sequence number */
@ -780,6 +782,40 @@ struct pw_stream {
struct spa_list controls;
};
#define pw_filter_emit(s,m,v,...) spa_hook_list_call(&(s)->listener_list, struct pw_filter_events, m, v, ##__VA_ARGS__)
#define pw_filter_emit_destroy(s) pw_filter_emit(s, destroy, 0)
#define pw_filter_emit_state_changed(s,o,n,e) pw_filter_emit(s, state_changed,0,o,n,e)
#define pw_filter_emit_io_changed(s,p,i,d,t) pw_filter_emit(s, io_changed,0,p,i,d,t)
#define pw_filter_emit_param_changed(s,p,i,f) pw_filter_emit(s, param_changed,0,p,i,f)
#define pw_filter_emit_add_buffer(s,p,b) pw_filter_emit(s, add_buffer, 0, p, b)
#define pw_filter_emit_remove_buffer(s,p,b) pw_filter_emit(s, remove_buffer, 0, p, b)
#define pw_filter_emit_process(s,p) pw_filter_emit(s, process, 0, p)
#define pw_filter_emit_drained(s) pw_filter_emit(s, drained, 0)
struct pw_filter {
struct pw_remote *remote; /**< the owner remote */
struct spa_list link; /**< link in the remote */
char *name; /**< the name of the filter */
struct pw_properties *properties; /**< properties of the filter */
uint32_t node_id; /**< node id for remote node, available from
* CONFIGURE state and higher */
enum pw_filter_state state; /**< filter state */
char *error; /**< error reason when state is in error */
struct spa_hook_list listener_list;
struct pw_proxy *proxy;
struct spa_hook proxy_listener;
struct pw_node_proxy *node;
struct spa_hook node_listener;
struct spa_list controls;
};
#define pw_factory_emit(s,m,v,...) spa_hook_list_call(&s->listener_list, struct pw_factory_events, m, v, ##__VA_ARGS__)
#define pw_factory_emit_destroy(s) pw_factory_emit(s, destroy, 0)