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Add ma_lpf with support for configuring the number of poles.

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This commit is contained in:
David Reid
2020-02-23 12:04:43 +10:00
parent e9234f8894
commit a263cd9730
2 changed files with 305 additions and 0 deletions
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tests/test_filtering/ma_test_filtering_lpf.c
+72
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@@ -124,6 +124,67 @@ ma_result test_lpf2__s16(const char* pInputFilePath)
}
ma_result test_lpf3__by_format(const char* pInputFilePath, const char* pOutputFilePath, ma_format format)
{
ma_result result;
ma_decoder decoder;
drwav wav;
ma_lpf_config lpfConfig;
ma_lpf lpf;
printf(" %s\n", pOutputFilePath);
result = lpf_init_decoder_and_encoder(pInputFilePath, pOutputFilePath, format, &decoder, &wav);
if (result != MA_SUCCESS) {
return result;
}
lpfConfig = ma_lpf_config_init(decoder.outputFormat, decoder.outputChannels, decoder.outputSampleRate, 2000, /*poles*/3);
result = ma_lpf_init(&lpfConfig, &lpf);
if (result != MA_SUCCESS) {
ma_decoder_uninit(&decoder);
drwav_uninit(&wav);
return result;
}
for (;;) {
ma_uint8 tempIn[4096];
ma_uint8 tempOut[4096];
ma_uint64 tempCapIn = sizeof(tempIn) / ma_get_bytes_per_frame(decoder.outputFormat, decoder.outputChannels);
ma_uint64 tempCapOut = sizeof(tempOut) / ma_get_bytes_per_frame(decoder.outputFormat, decoder.outputChannels);
ma_uint64 framesToRead;
ma_uint64 framesJustRead;
framesToRead = ma_min(tempCapIn, tempCapOut);
framesJustRead = ma_decoder_read_pcm_frames(&decoder, tempIn, framesToRead);
/* Filter */
ma_lpf_process_pcm_frames(&lpf, tempOut, tempIn, framesJustRead);
/* Write to the WAV file. */
drwav_write_pcm_frames(&wav, framesJustRead, tempOut);
if (framesJustRead < framesToRead) {
break;
}
}
drwav_uninit(&wav);
return MA_SUCCESS;
}
ma_result test_lpf3__f32(const char* pInputFilePath)
{
return test_lpf3__by_format(pInputFilePath, "output/lpf3_f32.wav", ma_format_f32);
}
ma_result test_lpf3__s16(const char* pInputFilePath)
{
return test_lpf3__by_format(pInputFilePath, "output/lpf3_s16.wav", ma_format_s16);
}
int test_entry__lpf(int argc, char** argv)
{
ma_result result;
@@ -159,6 +220,17 @@ int test_entry__lpf(int argc, char** argv)
}
result = test_lpf3__f32(pInputFilePath);
if (result != MA_SUCCESS) {
hasError = MA_TRUE;
}
result = test_lpf3__s16(pInputFilePath);
if (result != MA_SUCCESS) {
hasError = MA_TRUE;
}
if (hasError) {
return -1;
} else {