SDL  2.0
testaudiohotplug.c File Reference
#include "SDL_config.h"
#include <stdio.h>
#include <stdlib.h>
#include "SDL.h"
+ Include dependency graph for testaudiohotplug.c:

Go to the source code of this file.

Functions

static void quit (int rc)
 
void fillerup (void *_pos, Uint8 *stream, int len)
 
void poked (int sig)
 
static const char * devtypestr (int iscapture)
 
static void iteration ()
 
int main (int argc, char *argv[])
 

Variables

static SDL_AudioSpec spec
 
static Uint8sound = NULL
 
static Uint32 soundlen = 0
 
static int posindex = 0
 
static Uint32 positions [64]
 
static int done = 0
 

Function Documentation

◆ devtypestr()

static const char* devtypestr ( int  iscapture)
static

Definition at line 78 of file testaudiohotplug.c.

Referenced by iteration().

79 {
80  return iscapture ? "capture" : "output";
81 }

◆ fillerup()

void fillerup ( void _pos,
Uint8 stream,
int  len 
)

Definition at line 46 of file testaudiohotplug.c.

References SDL_memcpy, sound, and soundlen.

Referenced by iteration().

47 {
48  Uint32 pos = *((Uint32 *) _pos);
49  Uint8 *waveptr;
50  int waveleft;
51 
52  /* Set up the pointers */
53  waveptr = sound + pos;
54  waveleft = soundlen - pos;
55 
56  /* Go! */
57  while (waveleft <= len) {
58  SDL_memcpy(stream, waveptr, waveleft);
59  stream += waveleft;
60  len -= waveleft;
61  waveptr = sound;
62  waveleft = soundlen;
63  pos = 0;
64  }
65  SDL_memcpy(stream, waveptr, len);
66  pos += len;
67  *((Uint32 *) _pos) = pos;
68 }
uint32_t Uint32
Definition: SDL_stdinc.h:181
GLenum GLsizei len
static Uint8 * sound
#define SDL_memcpy
GLuint GLuint stream
uint8_t Uint8
Definition: SDL_stdinc.h:157
static Uint32 soundlen

◆ iteration()

static void iteration ( )
static

Definition at line 84 of file testaudiohotplug.c.

References SDL_Event::adevice, SDL_AudioSpec::callback, devtypestr(), done, e, fillerup(), SDL_AudioDeviceEvent::iscapture, SDL_Event::key, SDL_KeyboardEvent::keysym, loop(), NULL, posindex, positions, SDL_AUDIODEVICEADDED, SDL_AUDIODEVICEREMOVED, SDL_CloseAudioDevice, SDL_GetAudioDeviceName, SDL_GetError, SDL_KEYUP, SDL_Log, SDL_LOG_CATEGORY_APPLICATION, SDL_LogError, SDL_OpenAudioDevice, SDL_PauseAudioDevice, SDL_PollEvent, SDL_QUIT, SDLK_ESCAPE, SDL_Keysym::sym, SDL_Event::type, SDL_AudioSpec::userdata, and SDL_AudioDeviceEvent::which.

Referenced by main(), and video_getSetWindowData().

85 {
86  SDL_Event e;
88  while (SDL_PollEvent(&e)) {
89  if (e.type == SDL_QUIT) {
90  done = 1;
91  } else if (e.type == SDL_KEYUP) {
92  if (e.key.keysym.sym == SDLK_ESCAPE)
93  done = 1;
94  } else if (e.type == SDL_AUDIODEVICEADDED) {
95  int index = e.adevice.which;
96  int iscapture = e.adevice.iscapture;
97  const char *name = SDL_GetAudioDeviceName(index, iscapture);
98  if (name != NULL)
99  SDL_Log("New %s audio device at index %u: %s\n", devtypestr(iscapture), (unsigned int) index, name);
100  else {
101  SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Got new %s device at index %u, but failed to get the name: %s\n",
102  devtypestr(iscapture), (unsigned int) index, SDL_GetError());
103  continue;
104  }
105  if (!iscapture) {
106  positions[posindex] = 0;
109  dev = SDL_OpenAudioDevice(name, 0, &spec, NULL, 0);
110  if (!dev) {
111  SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't open '%s': %s\n", name, SDL_GetError());
112  } else {
113  SDL_Log("Opened '%s' as %u\n", name, (unsigned int) dev);
114  SDL_PauseAudioDevice(dev, 0);
115  }
116  }
117  } else if (e.type == SDL_AUDIODEVICEREMOVED) {
118  dev = (SDL_AudioDeviceID) e.adevice.which;
119  SDL_Log("%s device %u removed.\n", devtypestr(e.adevice.iscapture), (unsigned int) dev);
121  }
122  }
123 }
#define SDL_PollEvent
#define SDL_GetError
#define SDL_CloseAudioDevice
#define SDL_OpenAudioDevice
static SDL_AudioSpec spec
SDL_PRINTF_FORMAT_STRING const char int SDL_PRINTF_FORMAT_STRING const char int SDL_PRINTF_FORMAT_STRING const char int SDL_PRINTF_FORMAT_STRING const char const char SDL_SCANF_FORMAT_STRING const char return SDL_ThreadFunction const char void return Uint32 return Uint32 SDL_AssertionHandler void SDL_SpinLock SDL_atomic_t int int return SDL_atomic_t return void void void return void return int return SDL_AudioSpec SDL_AudioSpec return int int return return int SDL_RWops int SDL_AudioSpec Uint8 Uint32 * e
static const char * devtypestr(int iscapture)
GLuint const GLchar * name
#define SDL_LogError
#define SDL_GetAudioDeviceName
#define SDL_Log
static int posindex
static Uint32 positions[64]
SDL_Keysym keysym
Definition: SDL_events.h:199
SDL_AudioCallback callback
Definition: SDL_audio.h:186
GLuint index
#define NULL
Definition: begin_code.h:164
SDL_AudioDeviceEvent adevice
Definition: SDL_events.h:544
SDL_KeyboardEvent key
Definition: SDL_events.h:530
Uint32 SDL_AudioDeviceID
Definition: SDL_audio.h:329
void fillerup(void *_pos, Uint8 *stream, int len)
SDL_Keycode sym
Definition: SDL_keyboard.h:50
void * userdata
Definition: SDL_audio.h:187
General event structure.
Definition: SDL_events.h:525
static int done
Uint32 type
Definition: SDL_events.h:527
#define SDL_PauseAudioDevice

◆ main()

int main ( int  argc,
char *  argv[] 
)

Definition at line 137 of file testaudiohotplug.c.

References done, sort_controllers::filename, i, iteration(), loop(), NULL, poked(), quit(), SDL_CreateWindow, SDL_Delay, SDL_FreeWAV, SDL_GetAudioDriver, SDL_GetCurrentAudioDriver, SDL_GetError, SDL_GetNumAudioDrivers, SDL_Init, SDL_INIT_AUDIO, SDL_INIT_VIDEO, SDL_LoadWAV, SDL_Log, SDL_LOG_CATEGORY_APPLICATION, SDL_LOG_PRIORITY_INFO, SDL_LogError, SDL_LogSetPriority, SDL_MinimizeWindow, SDL_Quit, SDL_QuitSubSystem, SDL_strlcpy, SDL_WINDOWPOS_UNDEFINED, sound, and soundlen.

138 {
139  int i;
140  char filename[4096];
141 
142  /* Enable standard application logging */
144 
145  /* Load the SDL library */
147  SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't initialize SDL: %s\n", SDL_GetError());
148  return (1);
149  }
150 
151  /* Some targets (Mac CoreAudio) need an event queue for audio hotplug, so make and immediately hide a window. */
153 
154  if (argc > 1) {
155  SDL_strlcpy(filename, argv[1], sizeof(filename));
156  } else {
157  SDL_strlcpy(filename, "sample.wav", sizeof(filename));
158  }
159  /* Load the wave file into memory */
160  if (SDL_LoadWAV(filename, &spec, &sound, &soundlen) == NULL) {
161  SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't load %s: %s\n", filename, SDL_GetError());
162  quit(1);
163  }
164 
165 #if HAVE_SIGNAL_H
166  /* Set the signals */
167 #ifdef SIGHUP
168  signal(SIGHUP, poked);
169 #endif
170  signal(SIGINT, poked);
171 #ifdef SIGQUIT
172  signal(SIGQUIT, poked);
173 #endif
174  signal(SIGTERM, poked);
175 #endif /* HAVE_SIGNAL_H */
176 
177  /* Show the list of available drivers */
178  SDL_Log("Available audio drivers:");
179  for (i = 0; i < SDL_GetNumAudioDrivers(); ++i) {
180  SDL_Log("%i: %s", i, SDL_GetAudioDriver(i));
181  }
182 
183  SDL_Log("Select a driver with the SDL_AUDIODRIVER environment variable.\n");
184  SDL_Log("Using audio driver: %s\n", SDL_GetCurrentAudioDriver());
185 
186 #ifdef __EMSCRIPTEN__
187  emscripten_set_main_loop(loop, 0, 1);
188 #else
189  while (!done) {
190  SDL_Delay(100);
191  iteration();
192  }
193 #endif
194 
195  /* Clean up on signal */
196  /* Quit audio first, then free WAV. This prevents access violations in the audio threads. */
199  SDL_Quit();
200  return (0);
201 }
#define SDL_GetNumAudioDrivers
#define SDL_strlcpy
void loop()
Definition: checkkeys.c:152
#define SDL_GetError
static SDL_AudioSpec spec
#define SDL_QuitSubSystem
void poked(int sig)
#define SDL_FreeWAV
#define SDL_CreateWindow
#define SDL_WINDOWPOS_UNDEFINED
Definition: SDL_video.h:130
#define SDL_MinimizeWindow
static void quit(int rc)
static void iteration()
#define SDL_LogError
static Uint8 * sound
#define SDL_Log
#define SDL_Quit
#define SDL_LoadWAV(file, spec, audio_buf, audio_len)
Definition: SDL_audio.h:450
#define SDL_GetAudioDriver
static Uint32 soundlen
#define SDL_Delay
return Display return Display Bool Bool int int int return Display XEvent Bool(*) XPointer return Display return Display Drawable _Xconst char unsigned int unsigned int return Display Pixmap Pixmap XColor XColor unsigned int unsigned int return Display _Xconst char char int char return Display Visual unsigned int int int char unsigned int unsigned int in i)
Definition: SDL_x11sym.h:50
#define SDL_LogSetPriority
#define SDL_GetCurrentAudioDriver
#define NULL
Definition: begin_code.h:164
#define SDL_INIT_AUDIO
Definition: SDL.h:77
#define SDL_Init
static int done
#define SDL_INIT_VIDEO
Definition: SDL.h:78

◆ poked()

void poked ( int  sig)

Definition at line 72 of file testaudiohotplug.c.

References done.

Referenced by main().

73 {
74  done = 1;
75 }
static int done

◆ quit()

static void quit ( int  rc)
static

Definition at line 39 of file testaudiohotplug.c.

References SDL_Quit, and SDLCALL.

Referenced by main().

40 {
41  SDL_Quit();
42  exit(rc);
43 }
#define SDL_Quit

Variable Documentation

◆ done

int done = 0
static

Definition at line 70 of file testaudiohotplug.c.

Referenced by iteration(), main(), and poked().

◆ posindex

int posindex = 0
static

Definition at line 34 of file testaudiohotplug.c.

Referenced by iteration().

◆ positions

Uint32 positions[64]
static

Definition at line 35 of file testaudiohotplug.c.

Referenced by iteration().

◆ sound

Uint8* sound = NULL
static

Definition at line 31 of file testaudiohotplug.c.

Referenced by fillerup(), and main().

◆ soundlen

Uint32 soundlen = 0
static

Definition at line 32 of file testaudiohotplug.c.

Referenced by fillerup(), and main().

◆ spec

SDL_AudioSpec spec
static

Definition at line 30 of file testaudiohotplug.c.