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`
#ifndef EFL_BETA_API_SUPPORT
# define EFL_BETA_API_SUPPORT
#endif
#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",
printf("seek position: %0.3f\n",
printf("play length: %0.3f\n",
printf("is seekable: %d\n",
printf("video geometry: %dx%d\n", w, h);
printf("video width / height ratio: %0.3f\n",
printf("\n");
}
static void
_playback_started_cb(void *data EINA_UNUSED, const Efl_Event *ev)
{
printf(">>> Emotion object started playback.\n");
_display_info(ev->object);
}
static void
_playback_finished_cb(void *data EINA_UNUSED, const Efl_Event *ev)
{
printf(">>> Emotion object finished playback.\n");
_display_info(ev->object);
}
static void
_open_done_cb(void *data EINA_UNUSED, const Efl_Event *ev)
{
printf(">>> Emotion object open done.\n");
_display_info(ev->object);
}
static void
_position_update_cb(void *data EINA_UNUSED, const Efl_Event *ev)
{
printf(">>> Emotion object first position update.\n");
efl_event_callback_del(ev->object, EFL_CANVAS_VIDEO_EVENT_POSITION_CHANGE, _position_update_cb, NULL);
_display_info(ev->object);
}
static void
_frame_decode_cb(void *data EINA_UNUSED, const Efl_Event *ev)
{
printf(">>> Emotion object first frame decode.\n");
efl_event_callback_del(ev->object, EFL_CANVAS_VIDEO_EVENT_FRAME_DECODE, _frame_decode_cb, NULL);
_display_info(ev->object);
}
static void
_decode_stop_cb(void *data EINA_UNUSED, const Efl_Event *ev)
{
printf(">>> Emotion object decode stop.\n");
_display_info(ev->object);
}
static void
_frame_resize_cb(void *data EINA_UNUSED, const Efl_Event *ev)
{
printf(">>> Emotion object frame resize.\n");
_display_info(ev->object);
}
EFL_CALLBACKS_ARRAY_DEFINE(emotion_object_example_callbacks,
{ EFL_CANVAS_VIDEO_EVENT_PLAYBACK_START, _playback_started_cb },
{ EFL_CANVAS_VIDEO_EVENT_PLAYBACK_STOP, _playback_finished_cb },
{ EFL_CANVAS_VIDEO_EVENT_OPEN_DONE, _open_done_cb },
{ EFL_CANVAS_VIDEO_EVENT_POSITION_CHANGE, _position_update_cb },
{ EFL_CANVAS_VIDEO_EVENT_FRAME_DECODE, _frame_decode_cb },
{ EFL_CANVAS_VIDEO_EVENT_PLAYBACK_STOP, _decode_stop_cb },
{ EFL_CANVAS_VIDEO_EVENT_FRAME_RESIZE, _frame_resize_cb });
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];
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;
/* the canvas pointer, de facto */
e = ecore_evas_get(ee);
/* adding a background to this example */
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 */
/* Creating the emotion object */
/* 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);
efl_event_callback_array_add(em, emotion_object_example_callbacks(), NULL);
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);
return 0;
error:
return -1;
}
ecore_evas_new
EAPI Ecore_Evas * ecore_evas_new(const char *engine_name, int x, int y, int w, int h, const char *extra_options)
Creates a new Ecore_Evas based on engine name and common parameters.
Definition: ecore_evas.c:1065
ecore_evas_shutdown
EAPI int ecore_evas_shutdown(void)
Shuts down the Ecore_Evas system.
Definition: ecore_evas.c:674
EINA_UNUSED
#define EINA_UNUSED
Used to indicate that a function parameter is purposely unused.
Definition: eina_types.h:339
ecore_evas_free
EAPI void ecore_evas_free(Ecore_Evas *ee)
Frees an Ecore_Evas.
Definition: ecore_evas.c:1109
ecore_evas_init
EAPI int ecore_evas_init(void)
Inits the Ecore_Evas system.
Definition: ecore_evas.c:606
emotion_object_seekable_get
EAPI Eina_Bool emotion_object_seekable_get(const Evas_Object *obj)
Get whether the media file is seekable.
Definition: emotion_smart.c:779
Evas_Object
Efl_Canvas_Object Evas_Object
An Evas Object handle.
Definition: Evas_Common.h:185
evas_object_resize
void evas_object_resize(Evas_Object *obj, Evas_Coord w, Evas_Coord h)
Changes the size of the given Evas object.
Definition: evas_object_main.c:1236
Ecore_Evas.h
Evas wrapper functions.
ecore_evas_get
EAPI Evas * ecore_evas_get(const Ecore_Evas *ee)
Gets an Ecore_Evas's Evas.
Definition: ecore_evas.c:1326
EMOTION_META_INFO_TRACK_TITLE
@ EMOTION_META_INFO_TRACK_TITLE
track title
Definition: Emotion.h:180
Emotion.h
Emotion Media Library.
ecore_main_loop_begin
void ecore_main_loop_begin(void)
Runs the application main loop.
Definition: ecore_main.c:1298
emotion_object_size_get
EAPI void emotion_object_size_get(const Evas_Object *obj, int *iw, int *ih)
Retrieve the video size of the loaded file.
Definition: emotion_smart.c:811
evas_object_show
void evas_object_show(Evas_Object *eo_obj)
Makes the given Evas object visible.
Definition: evas_object_main.c:1814
emotion_object_add
EAPI Evas_Object * emotion_object_add(Evas *evas)
Add an emotion object to the canvas.
Definition: emotion_smart.c:237
Evas
Eo Evas
An opaque handle to an Evas canvas.
Definition: Evas_Common.h:163
EINA_TRUE
#define EINA_TRUE
boolean value TRUE (numerical value 1)
Definition: eina_types.h:539
emotion_object_position_get
EAPI double emotion_object_position_get(const Evas_Object *obj)
Get the position in the media file.
Definition: emotion_smart.c:755
emotion_object_file_set
EAPI Eina_Bool emotion_object_file_set(Evas_Object *obj, const char *filename)
Set the file to be played in the Emotion object.
Definition: emotion_smart.c:350
emotion_object_ratio_get
EAPI double emotion_object_ratio_get(const Evas_Object *obj)
Retrieve the video aspect ratio of the media file loaded.
Definition: emotion_smart.c:852
evas_object_rectangle_add
Evas_Object * evas_object_rectangle_add(Evas *e)
Adds a rectangle to the given evas.
Definition: evas_object_rectangle.c:78
emotion_object_play_get
EAPI Eina_Bool emotion_object_play_get(const Evas_Object *obj)
Get play/pause state of the media file.
Definition: emotion_smart.c:709
evas_object_move
void evas_object_move(Evas_Object *obj, Evas_Coord x, Evas_Coord y)
Move the given Evas object to the given location inside its canvas' viewport.
Definition: evas_object_main.c:1171
emotion_object_play_set
EAPI void emotion_object_play_set(Evas_Object *obj, Eina_Bool play)
Set play/pause state of the media file.
Definition: emotion_smart.c:648
emotion_object_play_length_get
EAPI double emotion_object_play_length_get(const Evas_Object *obj)
Get the length of play for the media file.
Definition: emotion_smart.c:805
evas_object_name_set
void evas_object_name_set(Evas_Object *eo_obj, const char *name)
Sets the name of the given Evas object to the given name.
Definition: evas_name.c:5
emotion_object_meta_info_get
EAPI const char * emotion_object_meta_info_get(const Evas_Object *obj, Emotion_Meta_Info meta)
Retrieve meta information from this file being played.
Definition: emotion_smart.c:1279
ecore_evas_show
EAPI void ecore_evas_show(Ecore_Evas *ee)
Shows an Ecore_Evas' window.
Definition: ecore_evas.c:1506
evas_object_color_set
void evas_object_color_set(Evas_Object *obj, int r, int g, int b, int a)
Sets the general/main color of the given Evas object to the given one.
Definition: evas_object_main.c:2024