示例目录

: /cri/pc/samples/criatomex/playback_memory

示例描述

: 可以通过指定内存地址和大小来播放加载到内存中的音频数据。

: 这种播放内存中的音频数据的方法称为内存播放。

: 由于内存播放不需要流，因此声音不会因数据供应延迟而中断。

: 此外，由于所有数据都已缓冲完毕，因此可以将播放开始延迟降至极低。

: 内存播放的代码如下。
CriFsStdioHn fp;

CriAtomExVoicePoolHn voice_pool;

CriAtomExPlayerHn player;

CriSint64 filesize;

CriSint32 mem_file;

/* 打开文件 */

fp = criFsStdio_OpenFile(NULL, PATH FILE, "r");

/* 获取文件大小 */

filesize = criFsStdio_GetFileSize(fp);

/* 按文件大小分配内存 */

mem_file = user_alloc(NULL, (CriSint32)filesize);

/* 加载播放数据 */

criFsStdio_ReadFile(fp, filesize, mem_file, filesize);

/* 关闭文件 */

criFsStdio_CloseFile(fp);

/* 创建Voice池 */

voice_pool = criAtomExVoicePool_AllocateAdxVoicePool(NULL, NULL, 0);

/* 创建Player */

player = criAtomExPlayer_Create(NULL, NULL, 0);

/* 设置读取播放数据的内存地址和大小 */

criAtomExPlayer_SetData(player, mem_file, (CriSint32)filesize);

/* 开始播放 */

criAtomExPlayer_Start(player);

criAtomExPlayer_SetData
void criAtomExPlayer_SetData(CriAtomExPlayerHn player, void *buffer, CriSint32 size)
Set the sound data to play (specifying in-memory data)

criAtomExPlayer_Start
CriAtomExPlaybackId criAtomExPlayer_Start(CriAtomExPlayerHn player)
Start the playback

CriAtomExPlayerHn
CriAtomExPlayerObj * CriAtomExPlayerHn
Player handle
Definition: cri_le_atom_ex.h:3622

criAtomExPlayer_Create
CriAtomExPlayerHn criAtomExPlayer_Create(const CriAtomExPlayerConfig *config, void *work, CriSint32 work_size)
Create an AtomEx player

CriAtomExVoicePoolHn
struct CriAtomExVoicePoolTag * CriAtomExVoicePoolHn
Voice Pool handle
Definition: cri_le_atom_ex.h:3220

criAtomExVoicePool_AllocateAdxVoicePool
CriAtomExVoicePoolHn criAtomExVoicePool_AllocateAdxVoicePool(const CriAtomExAdxVoicePoolConfig *config, void *work, CriSint32 work_size)
Create an ADX Voice Pool

: 内存播放的步骤如下。

在内存中读取音频数据（*.adx文件和*.hca文件）
使用::criAtomExPlayer_SetData函数，为Player设置音频数据的读取地址和大小
使用::criAtomExPlayer_Start函数开始播放