#include <stdio.h>
#include <errno.h>
#include <math.h>
#include <signal.h>
 
 
 
#define M_PI_M2f (float)(M_PI+M_PI)
 
#define DEFAULT_RATE            44100
#define DEFAULT_CHANNELS        2
#define DEFAULT_VOLUME          0.7f
 
struct data {
 
        float accumulator;
};
 
static void fill_f32(struct data *d, void *dest, int n_frames)
{
        float *dst = dest, val;
        int i, c;
 
        for (i = 0; i < n_frames; i++) {
                d->accumulator += M_PI_M2f * 440 / DEFAULT_RATE;
                if (d->accumulator >= M_PI_M2f)
                        d->accumulator -= M_PI_M2f;
 
                val = sinf(d->accumulator) * DEFAULT_VOLUME;
                for (c = 0; c < DEFAULT_CHANNELS; c++)
                        *dst++ = val;
        }
}
 
static void on_process(void *userdata)
{
        struct data *data = userdata;
        int n_frames, stride;
        uint8_t *p;
 
                return;
        }
 
                return;
 
        stride = sizeof(float) * DEFAULT_CHANNELS;
 
        fill_f32(data, p, n_frames);
 
 
}
 
        .process = on_process,
};
 
static void do_quit(void *userdata, int signal_number)
{
        struct data *data = userdata;
}
 
int main(int argc, char *argv[])
{
        struct data data = { 0, };
        uint8_t buffer[1024];
 
 
        
 
 
        
                        NULL);
        if (argc > 1)
                
                        "audio-src",
                        props,
                        &stream_events,
                        &data);
 
        
                                .channels = DEFAULT_CHANNELS,
                                .rate = DEFAULT_RATE ));
 
        
                          params, 1);
 
        
 
 
        return 0;
}
#define PW_ID_ANY
Definition core.h:77
#define PW_KEY_MEDIA_TYPE
Media.
Definition keys.h:499
#define PW_KEY_TARGET_OBJECT
a target object to link to.
Definition keys.h:566
#define PW_KEY_MEDIA_ROLE
Role: Movie, Music, Camera, Screen, Communication, Game, Notification, DSP, Production,...
Definition keys.h:505
#define PW_KEY_MEDIA_CATEGORY
Media Category: Playback, Capture, Duplex, Monitor, Manager.
Definition keys.h:502
#define pw_log_warn(...)
Definition log.h:179
PW_API_LOOP_IMPL struct spa_source * pw_loop_add_signal(struct pw_loop *object, int signal_number, spa_source_signal_func_t func, void *data)
Definition loop.h:141
int pw_main_loop_quit(struct pw_main_loop *loop)
Quit a main loop.
Definition main-loop.c:108
void pw_main_loop_destroy(struct pw_main_loop *loop)
Destroy a loop.
Definition main-loop.c:73
int pw_main_loop_run(struct pw_main_loop *loop)
Run a main loop.
Definition main-loop.c:122
struct pw_main_loop * pw_main_loop_new(const struct spa_dict *props)
Create a new main loop.
Definition main-loop.c:63
struct pw_loop * pw_main_loop_get_loop(struct pw_main_loop *loop)
Get the loop implementation.
Definition main-loop.c:96
void pw_init(int *argc, char **argv[])
Initialize PipeWire.
Definition pipewire.c:488
void pw_deinit(void)
Deinitialize PipeWire.
Definition pipewire.c:603
#define PW_DIRECTION_OUTPUT
Definition port.h:55
struct pw_properties * pw_properties_new(const char *key,...)
Make a new properties object.
Definition properties.c:97
int pw_properties_set(struct pw_properties *properties, const char *key, const char *value)
Set a property value.
Definition properties.c:585
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)
Connect a stream for input or output on port_path.
Definition stream.c:1902
struct pw_buffer * pw_stream_dequeue_buffer(struct pw_stream *stream)
Get a buffer that can be filled for playback streams or consumed for capture streams.
Definition stream.c:2458
int pw_stream_queue_buffer(struct pw_stream *stream, struct pw_buffer *buffer)
Submit a buffer for playback or recycle a buffer for capture.
Definition stream.c:2486
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)
Definition stream.c:1599
#define PW_VERSION_STREAM_EVENTS
Definition stream.h:417
void pw_stream_destroy(struct pw_stream *stream)
Destroy a stream.
Definition stream.c:1693
@ PW_STREAM_FLAG_MAP_BUFFERS
mmap the buffers except DmaBuf that is not explicitly marked as mappable.
Definition stream.h:469
@ PW_STREAM_FLAG_AUTOCONNECT
try to automatically connect this stream
Definition stream.h:464
@ PW_STREAM_FLAG_RT_PROCESS
call process from the realtime thread.
Definition stream.h:472
#define SPA_AUDIO_INFO_RAW_INIT(...)
Definition raw.h:291
SPA_API_AUDIO_RAW_UTILS struct spa_pod * spa_format_audio_raw_build(struct spa_pod_builder *builder, uint32_t id, const struct spa_audio_info_raw *info)
Definition raw-utils.h:57
@ SPA_PARAM_EnumFormat
available formats as SPA_TYPE_OBJECT_Format
Definition param.h:33
@ SPA_AUDIO_FORMAT_F32
Definition raw.h:104
#define SPA_POD_BUILDER_INIT(buffer, size)
Definition builder.h:72
#define SPA_MIN(a, b)
Definition defs.h:165
a buffer structure obtained from pw_stream_dequeue_buffer().
Definition stream.h:261
uint64_t requested
For playback streams, this field contains the suggested amount of data to provide.
Definition stream.h:273
struct spa_buffer * buffer
the spa buffer
Definition stream.h:262
Definition properties.h:39
Events for a stream.
Definition stream.h:415
A Buffer.
Definition buffer.h:110
struct spa_data * datas
array of data members
Definition buffer.h:114
int32_t stride
stride of valid data
Definition buffer.h:65
uint32_t size
size of valid data.
Definition buffer.h:63
uint32_t offset
offset of valid data.
Definition buffer.h:60
struct spa_chunk * chunk
valid chunk of memory
Definition buffer.h:106
void * data
optional data pointer
Definition buffer.h:105
uint32_t maxsize
max size of data
Definition buffer.h:104