#include <math.h>
#define M_PI_M2 ( M_PI + M_PI )
#define DEFAULT_RATE 44100
#define DEFAULT_CHANNELS 2
#define DEFAULT_VOLUME 0.7
struct data {
double accumulator;
};
static void on_process(void *userdata)
{
struct data *data = userdata;
int i, c, n_frames, stride;
int16_t *dst, val;
return;
}
return;
stride = sizeof(int16_t) * DEFAULT_CHANNELS;
for (i = 0; i < n_frames; i++) {
data->accumulator += M_PI_M2 * 440 / DEFAULT_RATE;
if (data->accumulator >= M_PI_M2)
data->accumulator -= M_PI_M2;
val = sin(data->accumulator) * DEFAULT_VOLUME * 16767.f;
for (c = 0; c < DEFAULT_CHANNELS; c++)
*dst++ = val;
}
}
.process = on_process,
};
int main(int argc, char *argv[])
{
struct data data = { 0, };
uint8_t buffer[1024];
"audio-src",
NULL),
&stream_events,
.channels = DEFAULT_CHANNELS,
.rate = DEFAULT_RATE ));
params, 1);
return 0;
}
#define PW_ID_ANY
Definition core.h:66
#define PW_KEY_MEDIA_TYPE
Media.
Definition keys.h:438
#define PW_KEY_MEDIA_ROLE
Role: Movie, Music, Camera, Screen, Communication, Game, Notification, DSP, Production,...
Definition keys.h:444
#define PW_KEY_MEDIA_CATEGORY
Media Category: Playback, Capture, Duplex, Monitor, Manager.
Definition keys.h:441
#define pw_log_warn(...)
Definition log.h:132
void pw_main_loop_destroy(struct pw_main_loop *loop)
Destroy a loop.
Definition main-loop.c:71
int pw_main_loop_run(struct pw_main_loop *loop)
Run a main loop.
Definition main-loop.c:120
struct pw_main_loop * pw_main_loop_new(const struct spa_dict *props)
Create a new main loop.
Definition main-loop.c:61
struct pw_loop * pw_main_loop_get_loop(struct pw_main_loop *loop)
Get the loop implementation.
Definition main-loop.c:94
void pw_init(int *argc, char **argv[])
Initialize PipeWire.
Definition pipewire.c:565
#define PW_DIRECTION_OUTPUT
Definition port.h:50
struct pw_properties * pw_properties_new(const char *key,...) 1
Make a new properties object.
Definition properties.c:85
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:1892
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:2401
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:2429
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:1591
#define PW_VERSION_STREAM_EVENTS
Definition stream.h:332
void pw_stream_destroy(struct pw_stream *stream)
Destroy a stream.
Definition stream.c:1685
@ PW_STREAM_FLAG_MAP_BUFFERS
mmap the buffers except DmaBuf
Definition stream.h:380
@ PW_STREAM_FLAG_AUTOCONNECT
try to automatically connect this stream
Definition stream.h:375
@ PW_STREAM_FLAG_RT_PROCESS
call process from the realtime thread.
Definition stream.h:382
static struct spa_pod * spa_format_audio_raw_build(struct spa_pod_builder *builder, uint32_t id, struct spa_audio_info_raw *info)
Definition raw-utils.h:47
#define SPA_AUDIO_INFO_RAW_INIT(...)
Definition raw.h:293
@ SPA_PARAM_EnumFormat
available formats as SPA_TYPE_OBJECT_Format
Definition param.h:33
@ SPA_AUDIO_FORMAT_S16
Definition raw.h:94
#define SPA_POD_BUILDER_INIT(buffer, size)
Definition builder.h:62
#define SPA_MIN(a, b)
Definition defs.h:151
a buffer structure obtained from pw_stream_dequeue_buffer().
Definition stream.h:196
uint64_t requested
For playback streams, this field contains the suggested amount of data to provide.
Definition stream.h:203
struct spa_buffer * buffer
the spa buffer
Definition stream.h:197
Events for a stream.
Definition stream.h:330
A Buffer.
Definition buffer.h:90
struct spa_data * datas
array of data members
Definition buffer.h:94
int32_t stride
stride of valid data
Definition buffer.h:49
uint32_t size
size of valid data.
Definition buffer.h:47
uint32_t offset
offset of valid data.
Definition buffer.h:44
struct spa_chunk * chunk
valid chunk of memory
Definition buffer.h:86
void * data
optional data pointer
Definition buffer.h:85
uint32_t maxsize
max size of data
Definition buffer.h:84
void * data
Definition builder.h:54