\hypertarget{emotion_signals_example_8c-example}{\section{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\+:


\begin{DoxyCodeInclude}
\textcolor{comment}{//Compile with:}
\textcolor{comment}{// gcc -o emotion\_signals\_example emotion\_signals\_example.c `pkg-config --libs --cflags emotion evas ecore
       ecore-evas`}

\textcolor{preprocessor}{#include <Ecore.h>}
\textcolor{preprocessor}{#include <\hyperlink{Ecore__Evas_8h}{Ecore\_Evas.h}>}
\textcolor{preprocessor}{#include <Evas.h>}
\textcolor{preprocessor}{#include <\hyperlink{Emotion_8h}{Emotion.h}>}
\textcolor{preprocessor}{#include <stdio.h>}

\textcolor{preprocessor}{#define WIDTH  (320)}
\textcolor{preprocessor}{#define HEIGHT (240)}

\textcolor{keyword}{static} \textcolor{keywordtype}{void}
\_display\_info(\hyperlink{group__Evas__Object__Group_ga9e19e6dd1f517a0ba437c0114d3e7c97}{Evas\_Object} *o)
\{
   \textcolor{keywordtype}{int} w, h;
   printf(\textcolor{stringliteral}{"playing: %d\(\backslash\)n"}, \hyperlink{group__Emotion__Play_gad98af85afb4a56479adaf39f4e205ecd}{emotion\_object\_play\_get}(o));
   printf(\textcolor{stringliteral}{"meta title: %s\(\backslash\)n"},
          \hyperlink{group__Emotion__Info_ga3c9a3919e9d253f2106842c21172b573}{emotion\_object\_meta\_info\_get}(o, 
      \hyperlink{Emotion_8h_ga90fb0b9d7b2c320f25118765ddcc8213ad104229a0d0ac128ce0b6fbb9c96aaa7}{EMOTION\_META\_INFO\_TRACK\_TITLE}));
   printf(\textcolor{stringliteral}{"seek position: %0.3f\(\backslash\)n"},
          \hyperlink{group__Emotion__Play_gae92dbeafe773cebd59740dc32ae7da1d}{emotion\_object\_position\_get}(o));
   printf(\textcolor{stringliteral}{"play length: %0.3f\(\backslash\)n"},
          \hyperlink{group__Emotion__Play_ga7afce8907b1bb37b1f08292019957e5a}{emotion\_object\_play\_length\_get}(o));
   printf(\textcolor{stringliteral}{"is seekable: %d\(\backslash\)n"},
          \hyperlink{group__Emotion__Play_ga1abc85aa331e33d58552692724ff4f4c}{emotion\_object\_seekable\_get}(o));
   \hyperlink{group__Emotion__Video_ga43910636929c5488347a022b9305b029}{emotion\_object\_size\_get}(o, &w, &h);
   printf(\textcolor{stringliteral}{"video geometry: %dx%d\(\backslash\)n"}, w, h);
   printf(\textcolor{stringliteral}{"video width / height ratio: %0.3f\(\backslash\)n"},
          \hyperlink{group__Emotion__Video_ga8edfce29000a58e41e1a8bca83ae66d8}{emotion\_object\_ratio\_get}(o));
   printf(\textcolor{stringliteral}{"\(\backslash\)n"});
\}

\textcolor{keyword}{static} \textcolor{keywordtype}{void}
\_playback\_started\_cb(\textcolor{keywordtype}{void} *data \hyperlink{group__Eina__Types__Group_ga82d751be730f849719ca292f9558be87}{EINA\_UNUSED}, \hyperlink{group__Evas__Object__Group_ga9e19e6dd1f517a0ba437c0114d3e7c97}{Evas\_Object} *o, \textcolor{keywordtype}{void} *event\_info 
      EINA\_UNUSED)
\{
   printf(\textcolor{stringliteral}{">>> Emotion object started playback.\(\backslash\)n"});
   \_display\_info(o);
\}

\textcolor{keyword}{static} \textcolor{keywordtype}{void}
\_playback\_finished\_cb(\textcolor{keywordtype}{void} *data \hyperlink{group__Eina__Types__Group_ga82d751be730f849719ca292f9558be87}{EINA\_UNUSED}, \hyperlink{group__Evas__Object__Group_ga9e19e6dd1f517a0ba437c0114d3e7c97}{Evas\_Object} *o, \textcolor{keywordtype}{void} *event\_info 
      EINA\_UNUSED)
\{
   printf(\textcolor{stringliteral}{">>> Emotion object finished playback.\(\backslash\)n"});
   \_display\_info(o);
\}

\textcolor{keyword}{static} \textcolor{keywordtype}{void}
\_open\_done\_cb(\textcolor{keywordtype}{void} *data \hyperlink{group__Eina__Types__Group_ga82d751be730f849719ca292f9558be87}{EINA\_UNUSED}, \hyperlink{group__Evas__Object__Group_ga9e19e6dd1f517a0ba437c0114d3e7c97}{Evas\_Object} *o, \textcolor{keywordtype}{void} *event\_info EINA\_UNUSED)
\{
   printf(\textcolor{stringliteral}{">>> Emotion object open done.\(\backslash\)n"});
   \_display\_info(o);
\}

\textcolor{keyword}{static} \textcolor{keywordtype}{void}
\_position\_update\_cb(\textcolor{keywordtype}{void} *data \hyperlink{group__Eina__Types__Group_ga82d751be730f849719ca292f9558be87}{EINA\_UNUSED}, \hyperlink{group__Evas__Object__Group_ga9e19e6dd1f517a0ba437c0114d3e7c97}{Evas\_Object} *o, \textcolor{keywordtype}{void} *event\_info 
      EINA\_UNUSED)
\{
   printf(\textcolor{stringliteral}{">>> Emotion object first position update.\(\backslash\)n"});
   \hyperlink{group__Evas__Smart__Object__Group_gaa79948c7d1bee9a75baa01e72dc4ef63}{evas\_object\_smart\_callback\_del}(o, \textcolor{stringliteral}{"position\_update"}, \_position\_update\_cb);
   \_display\_info(o);
\}

\textcolor{keyword}{static} \textcolor{keywordtype}{void}
\_frame\_decode\_cb(\textcolor{keywordtype}{void} *data \hyperlink{group__Eina__Types__Group_ga82d751be730f849719ca292f9558be87}{EINA\_UNUSED}, \hyperlink{group__Evas__Object__Group_ga9e19e6dd1f517a0ba437c0114d3e7c97}{Evas\_Object} *o, \textcolor{keywordtype}{void} *event\_info EINA\_UNUSED
      )
\{
   printf(\textcolor{stringliteral}{">>> Emotion object first frame decode.\(\backslash\)n"});
   \hyperlink{group__Evas__Smart__Object__Group_gaa79948c7d1bee9a75baa01e72dc4ef63}{evas\_object\_smart\_callback\_del}(o, \textcolor{stringliteral}{"frame\_decode"}, \_frame\_decode\_cb);
   \_display\_info(o);
\}

\textcolor{keyword}{static} \textcolor{keywordtype}{void}
\_decode\_stop\_cb(\textcolor{keywordtype}{void} *data \hyperlink{group__Eina__Types__Group_ga82d751be730f849719ca292f9558be87}{EINA\_UNUSED}, \hyperlink{group__Evas__Object__Group_ga9e19e6dd1f517a0ba437c0114d3e7c97}{Evas\_Object} *o, \textcolor{keywordtype}{void} *event\_info EINA\_UNUSED)
\{
   printf(\textcolor{stringliteral}{">>> Emotion object decode stop.\(\backslash\)n"});
   \_display\_info(o);
\}

\textcolor{keyword}{static} \textcolor{keywordtype}{void}
\_frame\_resize\_cb(\textcolor{keywordtype}{void} *data \hyperlink{group__Eina__Types__Group_ga82d751be730f849719ca292f9558be87}{EINA\_UNUSED}, \hyperlink{group__Evas__Object__Group_ga9e19e6dd1f517a0ba437c0114d3e7c97}{Evas\_Object} *o, \textcolor{keywordtype}{void} *event\_info EINA\_UNUSED
      )
\{
   printf(\textcolor{stringliteral}{">>> Emotion object frame resize.\(\backslash\)n"});
   \_display\_info(o);
\}

\textcolor{keyword}{static} \textcolor{keywordtype}{void}
\_setup\_emotion\_callbacks(\hyperlink{group__Evas__Object__Group_ga9e19e6dd1f517a0ba437c0114d3e7c97}{Evas\_Object} *o)
\{
   \hyperlink{group__Evas__Smart__Object__Group_ga18a8b179f94d21b2b09e19db11741061}{evas\_object\_smart\_callback\_add}(
      o, \textcolor{stringliteral}{"playback\_started"}, \_playback\_started\_cb, NULL);
   \hyperlink{group__Evas__Smart__Object__Group_ga18a8b179f94d21b2b09e19db11741061}{evas\_object\_smart\_callback\_add}(
      o, \textcolor{stringliteral}{"playback\_finished"}, \_playback\_finished\_cb, NULL);
   \hyperlink{group__Evas__Smart__Object__Group_ga18a8b179f94d21b2b09e19db11741061}{evas\_object\_smart\_callback\_add}(
      o, \textcolor{stringliteral}{"open\_done"}, \_open\_done\_cb, NULL);
   \hyperlink{group__Evas__Smart__Object__Group_ga18a8b179f94d21b2b09e19db11741061}{evas\_object\_smart\_callback\_add}(
      o, \textcolor{stringliteral}{"position\_update"}, \_position\_update\_cb, NULL);
   \hyperlink{group__Evas__Smart__Object__Group_ga18a8b179f94d21b2b09e19db11741061}{evas\_object\_smart\_callback\_add}(
      o, \textcolor{stringliteral}{"frame\_decode"}, \_frame\_decode\_cb, NULL);
   \hyperlink{group__Evas__Smart__Object__Group_ga18a8b179f94d21b2b09e19db11741061}{evas\_object\_smart\_callback\_add}(
      o, \textcolor{stringliteral}{"decode\_stop"}, \_decode\_stop\_cb, NULL);
   \hyperlink{group__Evas__Smart__Object__Group_ga18a8b179f94d21b2b09e19db11741061}{evas\_object\_smart\_callback\_add}(
      o, \textcolor{stringliteral}{"frame\_resize"}, \_frame\_resize\_cb, NULL);
\}

\textcolor{keywordtype}{int}
main(\textcolor{keywordtype}{int} argc, \textcolor{keyword}{const} \textcolor{keywordtype}{char} *argv[])
\{
   Ecore\_Evas *ee;
   \hyperlink{group__Evas__Canvas_ga5ff87cc4ce6bc43e3b640a6d37f73043}{Evas} *e;
   \hyperlink{group__Evas__Object__Group_ga9e19e6dd1f517a0ba437c0114d3e7c97}{Evas\_Object} *bg, *em;
   \textcolor{keyword}{const} \textcolor{keywordtype}{char} *filename = NULL;
   \textcolor{keyword}{const} \textcolor{keywordtype}{char} *module = NULL;

   \textcolor{keywordflow}{if} (argc < 2)
     \{
        printf(\textcolor{stringliteral}{"At least one argument is necessary. Usage:\(\backslash\)n"});
        printf(\textcolor{stringliteral}{"\(\backslash\)t%s <filename> [module\_name]\(\backslash\)n"}, argv[0]);
        \textcolor{keywordflow}{goto} \hyperlink{namespaceefl_1_1eina_1_1log__level_a0eec9fe47d243634f680b56a7d768ec7}{error};
     \}

   filename = argv[1];

   \textcolor{keywordflow}{if} (argc >= 3)
     module = argv[2];

   \textcolor{keywordflow}{if} (!\hyperlink{group__Ecore__Evas__Group_ga32ddbb6457033ad435a177eb0c4fe235}{ecore\_evas\_init}())
     \textcolor{keywordflow}{return} EXIT\_FAILURE;

   \textcolor{comment}{/* this will give you a window with an Evas canvas under the first}
\textcolor{comment}{    * engine available */}
   ee = \hyperlink{group__Ecore__Evas__Group_gac7f2cdbcb79635c34317c1183dd04cb0}{ecore\_evas\_new}(NULL, 10, 10, WIDTH, HEIGHT, NULL);
   \textcolor{keywordflow}{if} (!ee)
     \textcolor{keywordflow}{goto} \hyperlink{namespaceefl_1_1eina_1_1log__level_a0eec9fe47d243634f680b56a7d768ec7}{error};

   \hyperlink{group__Ecore__Evas__Group_ga4953047ff97d4f1b0d75a7d513d4f317}{ecore\_evas\_show}(ee);

   \textcolor{comment}{/* the canvas pointer, de facto */}
   e = \hyperlink{group__Ecore__Evas__Group_ga75a7cc694b6069e78df47dab0b0f2d20}{ecore\_evas\_get}(ee);

   \textcolor{comment}{/* adding a background to this example */}
   bg = \hyperlink{group__Evas__Object__Rectangle_ga4d80fc32ad1cac28428cebd65d746751}{evas\_object\_rectangle\_add}(e);
   evas\_object\_name\_set(bg, \textcolor{stringliteral}{"our dear rectangle"});
   \hyperlink{group__Evas__Object__Group__Basic_gae34bdcfd7f5100151f6ea8ef4a392949}{evas\_object\_color\_set}(bg, 255, 255, 255, 255); \textcolor{comment}{/* white bg */}
   evas\_object\_move(bg, 0, 0); \textcolor{comment}{/* at canvas' origin */}
   evas\_object\_resize(bg, WIDTH, HEIGHT); \textcolor{comment}{/* covers full canvas */}
   \hyperlink{group__Evas__Object__Group__Basic_ga9cbc13661584e49fb9d9cdab514a1eeb}{evas\_object\_show}(bg);

   \textcolor{comment}{/* Creating the emotion object */}
   em = \hyperlink{group__Emotion__Init_ga9b89c712866a0ae77d4cdc6c676e6c01}{emotion\_object\_add}(e);

   \textcolor{comment}{/* Try to load the specified module - NULL for auto-discover */}
   \textcolor{keywordflow}{if} (!emotion\_object\_init(em, module))
     fprintf(stderr, \textcolor{stringliteral}{"Emotion: \(\backslash\)"%s\(\backslash\)" module could not be initialized.\(\backslash\)n"}, module);

   \_display\_info(em);
   \_setup\_emotion\_callbacks(em);

   \textcolor{keywordflow}{if} (!\hyperlink{group__Emotion__Init_ga1b288409a547989d867fd735f7eec556}{emotion\_object\_file\_set}(em, filename))
     fprintf(stderr, \textcolor{stringliteral}{"Emotion: Could not load the file \(\backslash\)"%s\(\backslash\)"\(\backslash\)n"}, filename);

   evas\_object\_move(em, 0, 0);
   evas\_object\_resize(em, WIDTH, HEIGHT);
   \hyperlink{group__Evas__Object__Group__Basic_ga9cbc13661584e49fb9d9cdab514a1eeb}{evas\_object\_show}(em);

   \hyperlink{group__Emotion__Play_ga9be5c239d2100e2c16e18c171e1c1790}{emotion\_object\_play\_set}(em, \hyperlink{group__Eina__Types__Group_ga05c12dacc8b4058994df842b41be85fc}{EINA\_TRUE});

   \hyperlink{group__Ecore__Main__Loop__Group_gaf103b9f668bb3e4fed12e52c6180132d}{ecore\_main\_loop\_begin}();

   \hyperlink{group__Ecore__Evas__Group_gad3ec61f2aa03df4d3dbfd0d311e0c8dc}{ecore\_evas\_free}(ee);
   \hyperlink{group__Ecore__Evas__Group_gab8fa311077f749190c9b622f672b2214}{ecore\_evas\_shutdown}();
   \textcolor{keywordflow}{return} 0;

   \hyperlink{group__Ecore__Evas__Group_gad3ec61f2aa03df4d3dbfd0d311e0c8dc}{ecore\_evas\_free}(ee);

\hyperlink{namespaceefl_1_1eina_1_1log__level_a0eec9fe47d243634f680b56a7d768ec7}{error}:
   \hyperlink{group__Ecore__Evas__Group_gab8fa311077f749190c9b622f672b2214}{ecore\_evas\_shutdown}();
   \textcolor{keywordflow}{return} -1;
\}
\end{DoxyCodeInclude}
 