Question

我在使用Superpowered时间延长功能进行实时音高变换时遇到了问题。

为了我的目的，我使用了this solution。问题是我在输入缓冲区上应用了更改，这是一个短数组，并在处理缓冲区后得到了回音。

以下是相关代码 -

static bool audioProcessing(void * __unused clientdata, short int *audioInputOutput, int numberOfSamples, int __unused samplerate) {

        SuperpoweredAudiopointerList *outputBuffers = new SuperpoweredAudiopointerList(8, 16);

        // Create an input buffer for the time stretcher.
        SuperpoweredAudiobufferlistElement inputBuffer;
        inputBuffer.samplePosition = 0;
        inputBuffer.startSample = 0;
        inputBuffer.samplesUsed = 0;
        inputBuffer.endSample = numberOfSamples; // <-- Important!
        inputBuffer.buffers[0] = SuperpoweredAudiobufferPool::getBuffer(
                (unsigned int) (numberOfSamples * 8 + 64));
        inputBuffer.buffers[1] = inputBuffer.buffers[2] = inputBuffer.buffers[3] = NULL;

        // Convert the decoded PCM samples from 16-bit integer to 32-bit floating point.
        SuperpoweredShortIntToFloat(audioInputOutput, (float *)inputBuffer.buffers[0],
                                    (unsigned int) numberOfSamples);

        // Time stretching.
        timeStretch->process(&inputBuffer, outputBuffers);

        // Do we have some output?
        if (outputBuffers->makeSlice(0, outputBuffers->sampleLength)) {

            while (true) { // Iterate on every output slice.
                // Get pointer to the output samples.

                int _numSamples = 0;
                float *timeStretchedAudio = (float *)outputBuffers->nextSliceItem(&_numSamples);
                if (!timeStretchedAudio) break;

                SuperpoweredFloatToShortInt(timeStretchedAudio, audioInputOutput,
                                            (unsigned int) numberOfSamples);

            };

            // Clear the output buffer list.
            outputBuffers->clear();
        }

        return true;
    }

这是SuperpoweredAndroidAudioIO的音频处理功能。我在初始化函数中定义了timeStretch。我现在陷入困境，需要一些帮助......

感谢。

Answer 1

outputBuffers-＆gt; makeSlice应该要求＆＃34; numberOfSamples＆＃34;而不是整个＆＃34; sampleLength＆＃34;。此外，当您将这些样本放入＆＃34; audioInputOutput＆＃34;在那次迭代中，确保＆＃34; audioInputOutput＆＃34;也是步进的，否则你将覆盖相同的区域（开头）。

使用Superpowered Android进行实时音高转换

1 个答案: