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楼主 |
发表于 2019-9-27 01:02:28
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搞了一段时间, 试了好多办法, 下面这个程序比较简单易用, 也是网上收集的.
重采样集合块插入 效果理想.
void resampleData(const int16_t *sourceData, int32_t sampleRate, uint32_t srcSize, int16_t *destinationData, int32_t newSampleRate) {
if (sampleRate == newSampleRate)
{
memcpy(destinationData, sourceData, srcSize * sizeof(int16_t));
return;
}
uint32_t last_pos = srcSize - 1;
uint32_t dstSize = (uint32_t) (srcSize * ((float) newSampleRate / sampleRate));
for (uint32_t idx = 0; idx < dstSize; idx++)
{
float index = ((float) idx * sampleRate) / (newSampleRate);
uint32_t p1 = (uint32_t) index;
float coef = index - p1;
uint32_t p2 = (p1 == last_pos) ? last_pos : p1 + 1;
destinationData[idx] = (int16_t) ((1.0f - coef) * sourceData[p1] + coef * sourceData[p2]);
}
}
static void resampleData(const int16_t *sourceData, int32_t sampleRate, uint32_t srcSize, int16_t *destinationData, int32_t newSampleRate,uint32_t dstSize)
{
if (sampleRate == newSampleRate)
{
memcpy(destinationData, sourceData, srcSize * sizeof(int16_t));
return;
}
uint32_t last_pos = srcSize - 1;
//LOGDV("srcSize=%d,dstSize=%d",srcSize,dstSize);
for (uint32_t idx = 0; idx < dstSize; idx++)
{
float index = ((float) idx * sampleRate) / (newSampleRate);
uint32_t p1 = (uint32_t) index;
float coef = index - p1;
uint32_t p2 = (p1 == last_pos) ? last_pos : p1 + 1;
destinationData[idx] = (int16_t) ((1.0f - coef) * sourceData[p1] + coef * sourceData[p2]);
// LOGDV("index=%f,p1=%d,coef=%f,p2=%d",index,p1,coef,p2);
}
}
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发表于 2019-9-17 22:40:39
