static void stopBackground(bool bReleaseData)
{
s_playStatus = STOPPED;
if (s_mmrContext)
mmr_stop(s_mmrContext);
if (bReleaseData)
{
if (s_mmrContext)
{
mmr_input_detach(s_mmrContext);
mmr_context_destroy(s_mmrContext);
}
if (s_mmrConnection)
mmr_disconnect(s_mmrConnection);
if (s_repeatDictionary)
strm_dict_destroy(s_repeatDictionary);
if (s_volumeDictionary)
strm_dict_destroy(s_volumeDictionary);
s_mmrContext = 0;
s_mmrConnection = 0;
s_repeatDictionary = 0;
s_volumeDictionary = 0;
s_hasMMRError = false;
s_currentBackgroundStr = "";
s_isBackgroundInitialized = false;
}
}
/*
* we know the video has a resolution of 640x480 so it has an aspect ratio of
* of approximately 1.33. Based on these facts, we can show the video as large
* as possible without changing the aspect ratio.
*/
strm_dict_t* calculate_rect(int width, int height) {
const int image_width = 640;
const int image_height = 480;
const float image_aspect = (float)image_width / (float)image_height;
const float aspect_tolerance = 0.1;
char buffer[16];
strm_dict_t *dict = strm_dict_new();
if (NULL == dict) {
return NULL;
}
//fullscreen is the default.
dict = strm_dict_set(dict, "video_dest_x", "0");
if (NULL == dict)
goto fail;
dict = strm_dict_set(dict, "video_dest_y", "0");
if (NULL == dict)
goto fail;
dict = strm_dict_set(dict, "video_dest_w", itoa(width, buffer, 10));
if (NULL == dict)
goto fail;
dict = strm_dict_set(dict, "video_dest_h", itoa(height, buffer, 10));
if (NULL == dict)
goto fail;
float screen_aspect = (float)width/(float)height;
if (fabs(screen_aspect - image_aspect) < aspect_tolerance) {
//if the screen is at almost the same aspect as the video, just
//do full screen. Nothing to do here. Fall through and return
//full screen.
} else if (screen_aspect < image_aspect) {
/* The screen is too tall. We need to centre top to bottom, set the
* width the same as the screen's while maintaining the same aspect
* ratio.
*/
dict = strm_dict_set(dict, "video_dest_y", itoa((height - image_height) / 2, buffer, 10));
if (NULL == dict)
goto fail;
height = width / image_aspect;
dict = strm_dict_set(dict, "video_dest_h", itoa(height, buffer, 10));
if (NULL == dict)
goto fail;
} else {
/* The screen is too wide. We need to centre left to right, set the
* height the same as the screen's while maintaining the same aspect
* ratio.
*/
dict = strm_dict_set(dict, "video_dest_x", itoa((width - image_width) / 2, buffer, 10));
if (NULL == dict)
goto fail;
width = height * image_aspect;
dict = strm_dict_set(dict, "video_dest_w", itoa(width, buffer, 10));
if (NULL == dict)
goto fail;
}
return dict;
fail:
strm_dict_destroy(dict);
return NULL;
}
