#include <stdio.h>
#include <errno.h>
#include <math.h>
#include <signal.h>
struct data {
unsigned move:1;
};
static void on_process(void *userdata)
{
struct data *data = userdata;
float *samples, max;
uint32_t c, n, n_channels, n_samples, peak;
return;
}
return;
n_channels = data->format.info.raw.channels;
if (data->move)
fprintf(stdout, "%c[%dA", 0x1b, n_channels + 1);
fprintf(stdout, "captured %d samples\n", n_samples / n_channels);
for (c = 0; c < data->format.info.raw.channels; c++) {
max = 0.0f;
for (n = c; n < n_samples; n += n_channels)
max = fmaxf(max, fabsf(samples[n]));
fprintf(stdout, "channel %d: |%*s%*s| peak:%f\n",
c, peak+1, "*", 40 - peak, "", max);
}
data->move = true;
fflush(stdout);
}
static void
on_stream_param_changed(
void *_data, uint32_t
id,
const struct spa_pod *param)
{
struct data *data = _data;
return;
if (
spa_format_parse(param, &data->format.media_type, &data->format.media_subtype) < 0)
return;
return;
fprintf(stdout, "capturing rate:%d channels:%d\n",
data->format.info.raw.rate, data->format.info.raw.channels);
}
.param_changed = on_stream_param_changed,
.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-capture",
props,
&stream_events,
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_TARGET_OBJECT
a target object to link to.
Definition keys.h:503
#define PW_KEY_MEDIA_ROLE
Role: Movie, Music, Camera, Screen, Communication, Game, Notification, DSP, Production,...
Definition keys.h:444
#define PW_KEY_CONFIG_NAME
a config file name
Definition keys.h:85
#define PW_KEY_MEDIA_CATEGORY
Media Category: Playback, Capture, Duplex, Monitor, Manager.
Definition keys.h:441
#define pw_log_warn(...)
Definition log.h:132
#define pw_loop_add_signal(l,...)
Definition loop.h:63
int pw_main_loop_quit(struct pw_main_loop *loop)
Quit a main loop.
Definition main-loop.c:106
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
void pw_deinit(void)
Deinitialize PipeWire.
Definition pipewire.c:678
#define PW_DIRECTION_INPUT
Definition port.h:48
struct pw_properties * pw_properties_new(const char *key,...) 1
Make a new properties object.
Definition properties.c:85
int pw_properties_set(struct pw_properties *properties, const char *key, const char *value)
Set a property value.
Definition properties.c:422
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
static int spa_format_parse(const struct spa_pod *format, uint32_t *media_type, uint32_t *media_subtype)
Definition format-utils.h:27
static int spa_format_audio_raw_parse(const struct spa_pod *format, struct spa_audio_info_raw *info)
Definition raw-utils.h:28
#define SPA_AUDIO_INFO_RAW_INIT(...)
Definition raw.h:293
@ SPA_MEDIA_TYPE_audio
Definition format.h:27
@ SPA_PARAM_Format
configured format as SPA_TYPE_OBJECT_Format
Definition param.h:34
@ SPA_PARAM_EnumFormat
available formats as SPA_TYPE_OBJECT_Format
Definition param.h:33
@ SPA_MEDIA_SUBTYPE_raw
Definition format.h:38
@ SPA_AUDIO_FORMAT_F32
Definition raw.h:106
#define SPA_POD_BUILDER_INIT(buffer, size)
Definition builder.h:62
#define SPA_CLAMP(v, low, high)
Definition defs.h:163
a buffer structure obtained from pw_stream_dequeue_buffer().
Definition stream.h:196
struct spa_buffer * buffer
the spa buffer
Definition stream.h:197
Definition properties.h:33
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
uint32_t size
size of valid data.
Definition buffer.h:47
struct spa_chunk * chunk
valid chunk of memory
Definition buffer.h:86
void * data
optional data pointer
Definition buffer.h:85
void * data
Definition builder.h:54