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以下为Cascades/Qt项目中使用。
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CascadesI/Q项目中，不能在Project的Properties里面加入library mmrndclient 和 strm。
原因：Cascades GUI应用中，使用Qt和make编译的
解决办法：
修改项目根目录下面的Qt project文件（比如 XXX.pro文件）,在
CONFIG += qt warn_on debug_and_release cascades
后面加入
LIBS += -lmmrndclient -lstrm
参考：Linking An Object Library to an Application
其他：
在Cascades/Qt项目中，导入BB10 IDE中自带的PlayAudio例子程序。
例子程序中的头文件里面的MMR_ERROR_NONE 在编译的时候找不到相关定义，或者是语法错误。
个人学艺不精，只好暂时只好把头文件里面的ERR都暂时注释掉。
static const char *errlist[] = {
ERR( MMR_ERROR_NONE ),
...
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下面是代码，根据BB10 IDE中自带PlayAudio例子C程序修改为C++ Qt程序。
#ifndef _SOUNDMANAGER_H#define _SOUNDMANAGER_H
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/stat.h>
#include <bps/bps.h>
#include <bps/audiomixer.h>
#include <bps/dialog.h>
#include <bps/navigator.h>
#include <mm/renderer.h>
#include <QtCore/qstring.h>
#include <qhash.h>
/*
* buffer to store messages that we will display in the dialog
*/
#define MSG_SIZE 1024
static char msg[MSG_SIZE];
#if ! defined(DEFAULT_AUDIO_OUT)
#define DEFAULT_AUDIO_OUT "audio:default"
#endif
#define COLOR_PURPLE 0xffff00ff
#define WAV_RELATIVE_PATH "/app/native/assets/farewell.mp3"
#define ERR( code ) [ code ] = #code
static const char *errlist[] = {
};
/* Jiang TODO
ERR( mm_error_code.MMR_ERROR_NONE),
ERR( MMR_ERROR_UNKNOWN ),
ERR( MMR_ERROR_INVALID_PARAMETER ),
ERR( MMR_ERROR_INVALID_STATE ),
ERR( MMR_ERROR_UNSUPPORTED_VALUE ),
ERR( MMR_ERROR_UNSUPPORTED_MEDIA_TYPE ),
ERR( MMR_ERROR_MEDIA_PROTECTED ),
ERR( MMR_ERROR_UNSUPPORTED_OPERATION ),
ERR( MMR_ERROR_READ ),
ERR( MMR_ERROR_WRITE ),
ERR( MMR_ERROR_MEDIA_UNAVAILABLE ),
ERR( MMR_ERROR_MEDIA_CORRUPTED ),
ERR( MMR_ERROR_OUTPUT_UNAVAILABLE ),
ERR( MMR_ERROR_NO_MEMORY ),
ERR( MMR_ERROR_RESOURCE_UNAVAILABLE ),
*/
#undef ERR
#define NERRS ( sizeof(errlist) / sizeof(errlist[0]) )
class SoundManager: public QObject
{
Q_OBJECT
public:
SoundManager();
~SoundManager();
public slots:
void playmp3();
};
#endif //_SOUNDMANAGER_H
#include "soundmanager.h"void show_dialog_message(char* msg) {}static void mmrerror( mmr_context_t *ctxt, const char *errmsg ) { const mmr_error_info_t *err = mmr_error_info( ctxt ); unsigned errcode = err->error_code; const char *name; if ( errcode >= NERRS || ( name = errlist[ errcode ] ) == NULL ) { name = "bad error code"; } snprintf(msg, MSG_SIZE, "%s: error %d (%s)\n", errmsg, errcode, name ); show_dialog_message(msg);}void SoundManager::playmp3() { const char *mmrname = NULL; const char *ctxtname = "testplayer"; const char *audioout = NULL; const char *inputtype = "track"; char cwd[PATH_MAX]; char inputurl[PATH_MAX]; float volume; int rc; int final_return_code = EXIT_FAILURE; int exit_application = 0; mmr_connection_t *connection = NULL; mmr_context_t *ctxt = NULL; /* * Before we can listen for events from the BlackBerry(R) 10 OS platform * services, we need to initialize the BPS infrastructure */ bps_initialize(); /* * Once the BPS infrastructure has been initialized we can register for * events from the various BlackBerry(R) 10 OS platform services. The * Navigator service manages and delivers application life cycle and * visibility events. * For this sample, we request Navigator events so we can track when * the system is terminating the application (NAVIGATOR_EXIT event). This allows * us to clean up application resources. */ navigator_request_events(0); dialog_request_events(0); /* * Create and display the dialog. */ //Jiang //create_dialog(); getcwd(cwd, PATH_MAX); rc = snprintf(inputurl, PATH_MAX, "file://%s%s", cwd, WAV_RELATIVE_PATH); if (rc > PATH_MAX - 1) { show_dialog_message("File name and path too long"); //Jiang //return 1; //fail return; } mode_t mode = S_IRUSR | S_IXUSR; int audio_oid; // output ID strm_dict_t *aoparams = NULL; // output parameters audioout = DEFAULT_AUDIO_OUT; if ( ( connection = mmr_connect( mmrname ) ) == NULL ) { snprintf(msg, MSG_SIZE, "mmr_connect: %s", strerror(errno)); show_dialog_message(msg); } else if ( ( ctxt = mmr_context_create( connection, ctxtname, 0, mode ) ) == NULL ) { snprintf(msg, MSG_SIZE, "%s: %s", ctxtname, strerror(errno)); show_dialog_message(msg); } else if ( audioout && ( audio_oid = mmr_output_attach( ctxt, audioout, "audio" ) ) < 0 ) { mmrerror( ctxt, audioout ); } else if ( aoparams && mmr_output_parameters( ctxt, audio_oid, aoparams ) ) { mmrerror( ctxt, "output parameters (audio)" ); } else if ( mmr_input_attach( ctxt, inputurl, inputtype ) < 0 ) { mmrerror( ctxt, inputurl ); } else if ( mmr_play( ctxt ) < 0 ) { mmrerror( ctxt, "mmr_play" ); } else { //3 minutes and 5 seconds is the total length of the sample song. rc = audiomixer_get_output_level(AUDIOMIXER_OUTPUT_SPEAKER, &volume); if (rc == BPS_SUCCESS) { snprintf(msg, MSG_SIZE, "Successfully queried the output level.\ncurrent volume is %f\n", volume); show_dialog_message(msg); } else { show_dialog_message("Failed to query the output level.\n"); } //play for 30 seconds at normal volume sleep(30); //decrease the volume and play for 30 seconds audiomixer_set_output_level(AUDIOMIXER_OUTPUT_SPEAKER, volume / 2.0); if (rc == BPS_SUCCESS) { show_dialog_message("Successfully decreased the volume by half.\n"); } else { show_dialog_message("Failed to decrease the volume.\n"); } sleep(30); //set the volume to original level and play for 30 seconds audiomixer_set_output_level(AUDIOMIXER_OUTPUT_SPEAKER, volume); if (rc == BPS_SUCCESS) { show_dialog_message("Successfully set the volume back to original level.\n"); } else { show_dialog_message("Failed to set the volume.\n"); } sleep(30); //mute for 5 seconds audiomixer_set_output_mute(AUDIOMIXER_OUTPUT_SPEAKER, true); if (rc == BPS_SUCCESS) { show_dialog_message("Successfully muted.\n"); } else { show_dialog_message("Failed to mute.\n"); } sleep(5); //toggle the mute setting and play until the end audiomixer_toggle_output_mute(AUDIOMIXER_OUTPUT_SPEAKER); if (rc == BPS_SUCCESS) { show_dialog_message("Successfully toggled the mute setting.\n"); } else { show_dialog_message("Failed to toggle the mute setting.\n"); } final_return_code = EXIT_SUCCESS; } /* * Process Navigator events until we receive a NAVIGATOR_EXIT event. */ while (!exit_application) { /* * Using a negative timeout (-1) in the call to bps_get_event(...) * ensures that we don't busy wait by blocking until an event is * available. */ bps_event_t *event = NULL; bps_get_event(&event, -1); if (event) { /* * If it is a NAVIGATOR_EXIT event then set the exit_application * flag so the application will stop processing events, clean up * and exit */ if (bps_event_get_domain(event) == navigator_get_domain()) { if (NAVIGATOR_EXIT == bps_event_get_code(event) && (final_return_code == EXIT_SUCCESS)) { mmr_stop( ctxt ); // Not really necessary -- mmr_input_detach() would take care of this mmr_input_detach( ctxt ); // Not really necessary -- mmr_context_destroy() would take care of this mmr_context_destroy( ctxt ); // Not really necessary -- mmr_disconnect() would take care of this mmr_disconnect( connection ); // Not really necessary -- exiting would take care of this exit_application = 1; } } } } /* * Clean up the BPS infrastructure and exit */ bps_shutdown(); //Jiang //return final_return_code; return;}SoundManager::SoundManager(){}SoundManager::~SoundManager(){}