如何在 iOS 上的多通道混音器中实现缓冲？

发布于 2024-11-09 21:19:47 字数 1022 浏览 0 评论 0原文

我使用 MixerHostAudio 同时加载多个音频文件。

我无法将整个文件加载到内存中，因为应用程序崩溃了！

有人可以帮助我实现缓冲 thesae 文件的算法吗？

或者至少给我举个例子？

我设法做到了这一点：

我确定了调用渲染函数的代码：

    UInt32 numberOfPacketsToRead = (UInt32) totalFramesInFile;

    result = ExtAudioFileRead (audioFileObject, &numberOfPacketsToRead, bufferList);

    free (bufferList);

    if (noErr != result) {

        [self printErrorMessage: @"ExtAudioFileRead failure - " withStatus: result];

        // If reading from the file failed, then free the memory for the sound buffer.
        free (soundStructArray[audioFile].audioDataLeft);
        soundStructArray[audioFile].audioDataLeft = 0;

        if (2 == channelCount) {
            free (soundStructArray[audioFile].audioDataRight);
            soundStructArray[audioFile].audioDataRight = 0;
        }

        ExtAudioFileDispose (audioFileObject);            
        return;
    }

---现在我只缺少缓冲完成时的部分，我可以告诉程序获取下一个块......

有什么想法吗？

谢谢埃尔南

原文

Im Using the MixerHostAudio to load Several Audio Files at the Same Time.

I Cant load the Whole files to the memory because the APP CRASHES!

Can someone help me implement an Algorythm for Buffering thesae files?

Or at least point me to an example?

I managed to get this far:

I PinPointed the Code where the call to the Rendering Function is Called:

    UInt32 numberOfPacketsToRead = (UInt32) totalFramesInFile;

    result = ExtAudioFileRead (audioFileObject, &numberOfPacketsToRead, bufferList);

    free (bufferList);

    if (noErr != result) {

        [self printErrorMessage: @"ExtAudioFileRead failure - " withStatus: result];

        // If reading from the file failed, then free the memory for the sound buffer.
        free (soundStructArray[audioFile].audioDataLeft);
        soundStructArray[audioFile].audioDataLeft = 0;

        if (2 == channelCount) {
            free (soundStructArray[audioFile].audioDataRight);
            soundStructArray[audioFile].audioDataRight = 0;
        }

        ExtAudioFileDispose (audioFileObject);            
        return;
    }

--- NOW Im only missing the part when the Buffering is finished and I Can Tell the Program to get the Next Chunk....

Any Ideas?

Thanks

Hernan

分享到QQ

分享到微博