emotion_signals_example.c

This example shows that some of the information available from the emotion object, like the media file play length, aspect ratio, etc. can be not available just after setting the file to the emotion object.

One callback is declared for each of the following signals, and some of the info about the file is displayed. Also notice that the order that these signals are emitted can change depending on the module being used. Following is the full source code of this example:

//Compile with:
// gcc -o emotion_signals_example emotion_signals_example.c `pkg-config --libs --cflags emotion evas ecore ecore-evas eo`
#define EFL_EO_API_SUPPORT
#define EFL_BETA_API_SUPPORT
#include <Ecore.h>
#include <Ecore_Evas.h>
#include <Evas.h>
#include <Emotion.h>
#include <stdio.h>
#define WIDTH (320)
#define HEIGHT (240)
static void
_display_info(Evas_Object *o)
{
int w, h;
printf("playing: %d\n", emotion_object_play_get(o));
printf("meta title: %s\n",
emotion_object_meta_info_get(o, EMOTION_META_INFO_TRACK_TITLE));
printf("seek position: %0.3f\n",
emotion_object_position_get(o));
printf("play length: %0.3f\n",
emotion_object_play_length_get(o));
printf("is seekable: %d\n",
emotion_object_seekable_get(o));
emotion_object_size_get(o, &w, &h);
printf("video geometry: %dx%d\n", w, h);
printf("video width / height ratio: %0.3f\n",
emotion_object_ratio_get(o));
printf("\n");
}
static Eina_Bool
_playback_started_cb(void *data EINA_UNUSED,
Eo *o, const Eo_Event_Description *desc EINA_UNUSED, void *event_info EINA_UNUSED)
{
printf(">>> Emotion object started playback.\n");
_display_info(o);
return EINA_TRUE;
}
static Eina_Bool
_playback_finished_cb(void *data EINA_UNUSED,
Eo *o, const Eo_Event_Description *desc EINA_UNUSED, void *event_info EINA_UNUSED)
{
printf(">>> Emotion object finished playback.\n");
_display_info(o);
return EINA_TRUE;
}
static Eina_Bool
_open_done_cb(void *data EINA_UNUSED,
Eo *o, const Eo_Event_Description *desc EINA_UNUSED, void *event_info EINA_UNUSED)
{
printf(">>> Emotion object open done.\n");
_display_info(o);
return EINA_TRUE;
}
static Eina_Bool
_position_update_cb(void *data EINA_UNUSED,
Eo *o, const Eo_Event_Description *desc EINA_UNUSED, void *event_info EINA_UNUSED)
{
printf(">>> Emotion object first position update.\n");
eo_do(o, eo_event_callback_del(EMOTION_OBJECT_EVENT_POSITION_UPDATE,
_position_update_cb, NULL));
_display_info(o);
return EINA_TRUE;
}
static Eina_Bool
_frame_decode_cb(void *data EINA_UNUSED,
Eo *o, const Eo_Event_Description *desc EINA_UNUSED, void *event_info EINA_UNUSED)
{
printf(">>> Emotion object first frame decode.\n");
eo_do(o, eo_event_callback_del(EMOTION_OBJECT_EVENT_FRAME_DECODE,
_frame_decode_cb, NULL));
_display_info(o);
return EINA_TRUE;
}
static Eina_Bool
_decode_stop_cb(void *data EINA_UNUSED,
Eo *o, const Eo_Event_Description *desc EINA_UNUSED, void *event_info EINA_UNUSED)
{
printf(">>> Emotion object decode stop.\n");
_display_info(o);
return EINA_TRUE;
}
static Eina_Bool
_frame_resize_cb(void *data EINA_UNUSED,
Eo *o, const Eo_Event_Description *desc EINA_UNUSED, void *event_info EINA_UNUSED)
{
printf(">>> Emotion object frame resize.\n");
_display_info(o);
return EINA_TRUE;
}
static const Eo_Callback_Array_Item emotion_object_example_callbacks[] = {
{ EMOTION_OBJECT_EVENT_PLAYBACK_STARTED, _playback_started_cb },
{ EMOTION_OBJECT_EVENT_PLAYBACK_FINISHED, _playback_finished_cb },
{ EMOTION_OBJECT_EVENT_OPEN_DONE, _open_done_cb },
{ EMOTION_OBJECT_EVENT_POSITION_UPDATE, _position_update_cb },
{ EMOTION_OBJECT_EVENT_FRAME_DECODE, _frame_decode_cb },
{ EMOTION_OBJECT_EVENT_DECODE_STOP, _decode_stop_cb },
{ EMOTION_OBJECT_EVENT_FRAME_RESIZE, _frame_resize_cb },
{ NULL, NULL }
};
static void
_setup_emotion_callbacks(Evas_Object *o)
{
eo_do(o, eo_event_callback_add
(EMOTION_OBJECT_EVENT_PLAYBACK_STARTED, _playback_started_cb, NULL));
}
int
main(int argc, const char *argv[])
{
Ecore_Evas *ee;
Evas *e;
Evas_Object *bg, *em;
const char *filename = NULL;
const char *module = NULL;
if (argc < 2)
{
printf("At least one argument is necessary. Usage:\n");
printf("\t%s <filename> [module_name]\n", argv[0]);
goto error;
}
filename = argv[1];
if (argc >= 3)
module = argv[2];
if (!ecore_evas_init())
return EXIT_FAILURE;
/* this will give you a window with an Evas canvas under the first
* engine available */
ee = ecore_evas_new(NULL, 10, 10, WIDTH, HEIGHT, NULL);
if (!ee)
goto error;
ecore_evas_show(ee);
/* the canvas pointer, de facto */
e = ecore_evas_get(ee);
/* adding a background to this example */
bg = evas_object_rectangle_add(e);
evas_object_name_set(bg, "our dear rectangle");
evas_object_color_set(bg, 255, 255, 255, 255); /* white bg */
evas_object_move(bg, 0, 0); /* at canvas' origin */
evas_object_resize(bg, WIDTH, HEIGHT); /* covers full canvas */
evas_object_show(bg);
/* Creating the emotion object */
em = emotion_object_add(e);
/* Try to load the specified module - NULL for auto-discover */
if (!emotion_object_init(em, module))
fprintf(stderr, "Emotion: \"%s\" module could not be initialized.\n", module);
_display_info(em);
_setup_emotion_callbacks(em);
if (!emotion_object_file_set(em, filename))
fprintf(stderr, "Emotion: Could not load the file \"%s\"\n", filename);
evas_object_move(em, 0, 0);
evas_object_resize(em, WIDTH, HEIGHT);
evas_object_show(em);
emotion_object_play_set(em, EINA_TRUE);
ecore_main_loop_begin();
ecore_evas_free(ee);
ecore_evas_shutdown();
return 0;
ecore_evas_free(ee);
error:
ecore_evas_shutdown();
return -1;
}