学步园

音乐播放器命令行界面实现源码解析

mpxcmd代码解析

cmd命令行方式的playlist及lyric实现同mpxUI，定时器功能播放歌曲控制等功能函数同mpxUI。不一样的地方为显示歌曲、歌词等。

完整代码见test.c文件https://github.com/menghun3/mpx/blob/master/mpxcmd/test.c

主要代码为

void main(int argc, char **argv)
{
	int choice = 0;

	int ch;
	int ret = 0;
	char *p = NULL;

	ret = PlayListInit();
	if (ret == -1)
	{
		printf("init play list error\n");
		return;
	}

	//mpxInit();
	print_note();
	do 
	{
		ch = getch();
		choice = ch - '1'+ CUSTOMER_PLAYFROMFILE;
		switch (choice)
		{
		case CUSTOMER_PLAYFROMFILE:
			{
				char buf[MAX_PATH]= {0};
				WCHAR songpath[MAX_PATH] = {0};
				char lyricpath[MAX_PATH] = {0};

				if (print_defaultplaylist() == -1)
				{
					printf("play list no item\n");
					break;
				}
				printf("input number choice");
				scanf("%d", &i);
				if (i == 0)
				{
					break;
				}
				i--;
				p = GetItemFromDefaultPlaylist(i);
				if (p == NULL)
				{
					break;
				}
				MakeLyricPathFromSongPath(p, lyricpath);
				LyricDestroy();
				LyricInit(lyricpath);
				MultiByteToWideChar(CP_ACP, MB_PRECOMPOSED, p, strlen(p), songpath, MAX_PATH);
				system("cls");
				printf("playing:%s\n", p);
				print_note();
				EndTimeEvent();
				mpxPlayFile(songpath);
				BeginTimeEvent();
				//PrintLyric();
				status = 1;
			}
			break;
		case CUSTOMER_PLAY:
			{
				mpxPlay();
				BeginTimeEvent();
				status = 1;
			}
			break;
		case CUSTOMER_STOP:
			{
				mpxStop();
				EndTimeEvent();
				status = 2;
			}
			break;
		case CUSTOMER_PAUSE:
			{
				mpxPause();
				EndTimeEvent();
				status = 3;
			}
			break;
		case CUSTOMER_PREV:
			{
				WCHAR songpath[MAX_PATH] = {0};
				char lyricpath[MAX_PATH] = {0};

				printf("\n");
				if (i > 0)
				{
					i--;
				}
				p = GetItemFromDefaultPlaylist(i);
				if (p == NULL)
				{
					break;
				}
				MakeLyricPathFromSongPath(p, lyricpath);
				LyricDestroy();
				LyricInit(lyricpath);
				MultiByteToWideChar(CP_ACP, MB_PRECOMPOSED, p, strlen(p), songpath, MAX_PATH);
				EndTimeEvent();
				mpxPlayFile(songpath);
				BeginTimeEvent();
				status = 1;
			}
			break;
		case CUSTOMER_NEXT:
			{
				WCHAR songpath[MAX_PATH] = {0};
				char lyricpath[MAX_PATH] = {0};

				printf("\n");
				i++;
				p = GetItemFromDefaultPlaylist(i);
				if (p == NULL)
				{
					break;
				}
				MakeLyricPathFromSongPath(p, lyricpath);
				LyricDestroy();
				LyricInit(lyricpath);
				MultiByteToWideChar(CP_ACP, MB_PRECOMPOSED, p, strlen(p), songpath, MAX_PATH);
				system("cls");
				printf("playing:%s\n", p);
				print_note();
				EndTimeEvent();
				mpxPlayFile(songpath);
				BeginTimeEvent();
				status = 1;
			}
			break;
		case CUSTOMER_PLAYLIST:
			{
				int plch;
				system("cls");
				printf("%d:add\t", PLAYLIST_ADD);
				printf("%d:dir\t", PLAYLIST_ADDDIR);
				printf("%d:save\t", PLAYLIST_SAVEPL);
				printf("%d:exit\t", PLAYLIST_LAST);
				do 
				{
					plch = getch();
					plch = plch - '1' + PLAYLIST_ADD;
					switch (plch)
					{
					case PLAYLIST_ADD:
						{
							AddFile();
						}
						break;
					case PLAYLIST_ADDDIR:
						{
							AddDirFile();
						}
						break;
					case PLAYLIST_SAVEPL:
						{
							DefaultPlaylistSave();
							printf("save play list\n");
						}
						break;
					default:
						break;
					}
				} while (plch != PLAYLIST_LAST);
			}
			break;
		case CUSTOMER_SET:
			{
				int setch;
				system("cls");
				printf("%d:vol plus\t", SET_VOLUME_PLUS);
				printf("%d:vol minus\t", SET_VOLUME_MINUS);
				printf("%d:exit", SET_LAST);

				do 
				{
					setch = getch();
					setch = setch - '1' + SET_VOLUME_PLUS;
					switch (setch)
					{
					case SET_VOLUME_PLUS:
						{
							setVolumePlus();
						}
						break;
					case SET_VOLUME_MINUS:
						{
							setVolumeMinus();
						}
						break;
					default:
						break;
					}
				} while (setch != SET_LAST);
			}
			break;
		case CUSTOMER_QUIT:
			{
				mpxDestroy();
				return;
			}
			break;
		default:
			break;
		}
		system("cls");
		printf("playing:%s\n", p);
		print_note();
	} while (1);
}

循环获取命令，根据命令清理屏幕及显示对应的命令选项。

结束语

音乐播放器通过最简单的方式实现音乐播放器主要的功能，可以认为是音乐播放器的框架，通过该框架可以扩展功能或者完善。其中为了实现方便简单，界面只使用了命令行方式和基于windows提供的界面组件实现，而不使用第三方界面开发包或者的windows提供的复杂的界面开发包。