stream.h

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/* PipeWire */
/* SPDX-FileCopyrightText: Copyright © 2018 Wim Taymans */
/* SPDX-License-Identifier: MIT */
 
#ifndef PIPEWIRE_STREAM_H
#define PIPEWIRE_STREAM_H
 
#ifdef __cplusplus
extern "C" {
#endif
 
struct pw_stream;
 
#include <spa/buffer/buffer.h>
#include <spa/param/param.h>
#include <spa/pod/command.h>
#include <spa/pod/event.h>
 
enum pw_stream_state {
        PW_STREAM_STATE_ERROR = -1,             
        PW_STREAM_STATE_UNCONNECTED = 0,        
        PW_STREAM_STATE_CONNECTING = 1,         
        PW_STREAM_STATE_PAUSED = 2,             
        PW_STREAM_STATE_STREAMING = 3           
};
 
struct pw_buffer {
        struct spa_buffer *buffer;      
        PW_STREAM_STATE_STREAMING = 3            {…};
        void *user_data;                
        uint64_t size;                  
        uint64_t requested;             
        uint64_t time;                  
};
 
struct pw_stream_control {
        const char *name;               
        uint32_t flags;                 
        float def;                      
        float min;                      
        float max;                      
        float *values;                  
        uint32_t n_values;              
        uint32_t max_values;            
};
 
        float max;                       {…};
struct pw_time {
        int64_t now;                    
        struct spa_fraction rate;       
        uint64_t ticks;                 
        int64_t delay;                  
        uint64_t queued;                
        uint64_t buffered;              
        uint32_t queued_buffers;        
        uint32_t avail_buffers;         
        uint64_t size;                  
};
 
#include <pipewire/port.h>
 
struct pw_stream_events {
#define PW_VERSION_STREAM_EVENTS        2
        uint32_t version;
 
        void (*destroy) (void *data);
        void (*state_changed) (void *data, enum pw_stream_state old,
                                enum pw_stream_state state, const char *error);
 
        void (*control_info) (void *data, uint32_t id, const struct pw_stream_control *control);
 
        void (*io_changed) (void *data, uint32_t id, void *area, uint32_t size);
        void (*param_changed) (void *data, uint32_t id, const struct spa_pod *param);
 
        void (*add_buffer) (void *data, struct pw_buffer *buffer);
        void (*remove_buffer) (void *data, struct pw_buffer *buffer);
 
        void (*process) (void *data);
 
        void (*drained) (void *data);
 
        void (*command) (void *data, const struct spa_command *command);
 
        void (*trigger_done) (void *data);
};
 
const char * pw_stream_state_as_string(enum pw_stream_state state);
 
enum pw_stream_flags {
        PW_STREAM_FLAG_NONE = 0,                        
        PW_STREAM_FLAG_AUTOCONNECT      = (1 << 0),     
        PW_STREAM_FLAG_INACTIVE         = (1 << 1),     
        PW_STREAM_FLAG_MAP_BUFFERS      = (1 << 2),     
        PW_STREAM_FLAG_DRIVER           = (1 << 3),     
        PW_STREAM_FLAG_RT_PROCESS       = (1 << 4),     
        PW_STREAM_FLAG_NO_CONVERT       = (1 << 5),     
        PW_STREAM_FLAG_EXCLUSIVE        = (1 << 6),     
        PW_STREAM_FLAG_DONT_RECONNECT   = (1 << 7),     
        PW_STREAM_FLAG_ALLOC_BUFFERS    = (1 << 8),     
        PW_STREAM_FLAG_TRIGGER          = (1 << 9),     
        PW_STREAM_FLAG_ASYNC            = (1 << 10),    
        PW_STREAM_FLAG_EARLY_PROCESS    = (1 << 11),    
        PW_STREAM_FLAG_RT_TRIGGER_DONE  = (1 << 12),    
};
 
struct pw_stream *
pw_stream_new(struct pw_core *core,             
              const char *name,                 
              struct pw_properties *props       );
 
struct pw_stream *
pw_stream_new_simple(struct pw_loop *loop,      
                     const char *name,          
                     struct pw_properties *props,
                     const struct pw_stream_events *events,     
                     void *data                                 );
 
void pw_stream_destroy(struct pw_stream *stream);
 
void pw_stream_add_listener(struct pw_stream *stream,
                            struct spa_hook *listener,
                            const struct pw_stream_events *events,
                            void *data);
 
enum pw_stream_state pw_stream_get_state(struct pw_stream *stream, const char **error);
 
const char *pw_stream_get_name(struct pw_stream *stream);
 
struct pw_core *pw_stream_get_core(struct pw_stream *stream);
 
const struct pw_properties *pw_stream_get_properties(struct pw_stream *stream);
 
int pw_stream_update_properties(struct pw_stream *stream, const struct spa_dict *dict);
 
int
pw_stream_connect(struct pw_stream *stream,             
                  enum pw_direction direction,          
                  uint32_t target_id,                   
                  enum pw_stream_flags flags,           
                  const struct spa_pod **params,        
                  uint32_t n_params                     );
 
uint32_t
pw_stream_get_node_id(struct pw_stream *stream);
 
int pw_stream_disconnect(struct pw_stream *stream);
 
int pw_stream_set_error(struct pw_stream *stream,       
                        int res,                        
                        const char *error,              
                        ...) SPA_PRINTF_FUNC(3, 4);
 
int
pw_stream_update_params(struct pw_stream *stream,       
                        const struct spa_pod **params,  
                        uint32_t n_params               );
 
int pw_stream_set_param(struct pw_stream *stream,       
                        uint32_t id,                    
                        const struct spa_pod *param     );
 
const struct pw_stream_control *pw_stream_get_control(struct pw_stream *stream, uint32_t id);
 
int pw_stream_set_control(struct pw_stream *stream, uint32_t id, uint32_t n_values, float *values, ...);
 
int pw_stream_get_time_n(struct pw_stream *stream, struct pw_time *time, size_t size);
 
uint64_t pw_stream_get_nsec(struct pw_stream *stream);
 
struct pw_loop *pw_stream_get_data_loop(struct pw_stream *stream);
 
SPA_DEPRECATED
int pw_stream_get_time(struct pw_stream *stream, struct pw_time *time);
 
struct pw_buffer *pw_stream_dequeue_buffer(struct pw_stream *stream);
 
int pw_stream_queue_buffer(struct pw_stream *stream, struct pw_buffer *buffer);
 
int pw_stream_return_buffer(struct pw_stream *stream, struct pw_buffer *buffer);
 
int pw_stream_set_active(struct pw_stream *stream, bool active);
 
int pw_stream_flush(struct pw_stream *stream, bool drain);
 
bool pw_stream_is_driving(struct pw_stream *stream);
 
bool pw_stream_is_lazy(struct pw_stream *stream);
 
int pw_stream_trigger_process(struct pw_stream *stream);
 
int pw_stream_emit_event(struct pw_stream *stream, const struct spa_event *event);
 
int pw_stream_set_rate(struct pw_stream *stream, double rate);
 
#ifdef __cplusplus
}
#endif
 
#endif /* PIPEWIRE_STREAM_H */