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ecore_audio: Example for user generated sounds 

Uses the custom function support, which can probably be improved

Signed-off-by: Daniel Willmann <d.willmann@samsung.com>

SVN revision: 81002
This commit is contained in:
Daniel Willmann 2012-12-14 23:38:31 +00:00 committed by Daniel Willmann
parent 2143671420
commit 55f6091e3d
2 changed files with 79 additions and 0 deletions
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4
src/examples/ecore/Makefile.am
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@ -53,8 +53,12 @@ ecore_timer_example
if HAVE_ECORE_AUDIO
EXTRA_PROGRAMS += \
ecore_audio_custom \
ecore_audio_playback
ecore_audio_custom_SOURCES = ecore_audio_custom.c
ecore_audio_custom_LDADD = $(top_builddir)/src/lib/ecore_audio/libecore_audio.la $(top_builddir)/src/lib/ecore/libecore.la $(top_builddir)/src/lib/eina/libeina.la @ECORE_LIBS@
ecore_audio_playback_SOURCES = ecore_audio_playback.c
ecore_audio_playback_LDADD = $(top_builddir)/src/lib/ecore_audio/libecore_audio.la $(top_builddir)/src/lib/ecore/libecore.la $(top_builddir)/src/lib/eina/libeina.la @ECORE_LIBS@

75
src/examples/ecore/ecore_audio_custom.c Normal file
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@ -0,0 +1,75 @@
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <termios.h>
#include <unistd.h>
#include <fcntl.h>
#include <Ecore.h>
#include <Ecore_Audio.h>
#include <math.h>
Ecore_Audio_Object *in = NULL;
Ecore_Audio_Object *out = NULL;
unsigned char volume = 255;
int read_cb(void *user_data, void *data, int len)
{
static long int phase1 = 0, phase2 = 0;
static int modulation = 0;
float *val = data;
int i;
for(i=0; i<len/4; i++, phase1++)
{
if (phase1 >= 44100/(440+modulation))
{
phase1 = 0;
modulation = sin(2 * M_PI * phase2 / 1000) * 100;
phase2++;
}
val[i++] = sin(2 * M_PI * (440+modulation) * (phase1) / 44100.0);
val[i] = sin(2 * M_PI * (440+modulation) * (phase1) / 44100.0);
}
return len;
}
Eina_Bool
output_add(void *data)
{
out = ecore_audio_output_add(ECORE_AUDIO_TYPE_PULSE);
ecore_audio_output_input_add(out, in);
// ecore_event_handler_add(ECORE_AUDIO_EVENT_SOURCE_DONE, _play_finished, NULL);
return EINA_FALSE;
}
int
main(int argc, const char *argv[])
{
ecore_init();
ecore_audio_init();
in = ecore_audio_input_add(ECORE_AUDIO_TYPE_CUSTOM);
if (!in)
{
printf("error when creating ecore audio source.\n");
goto end;
}
ecore_audio_input_name_set(in, "custom");
ecore_audio_input_callback_setup(in, read_cb, NULL);
ecore_timer_add(1, output_add, NULL);
ecore_main_loop_begin();
end:
ecore_audio_shutdown();
ecore_shutdown();
return 0;
}