Add filtering tests.

tests/test_common/ma_test_common.c

+#define DR_FLAC_IMPLEMENTATION
+#include "../../extras/dr_flac.h"
+#define DR_MP3_IMPLEMENTATION
+#include "../../extras/dr_mp3.h"
+#define DR_WAV_IMPLEMENTATION
+#include "../../extras/dr_wav.h"
+
 #define MINIAUDIO_IMPLEMENTATION
 #include "../../miniaudio.h"
 
@@ -35,3 +42,21 @@ ma_result ma_register_test(const char* pName, ma_test_entry_proc onEntry)
 
     return MA_SUCCESS;
 }
+
+static drwav_data_format drwav_data_format_from_minaudio_format(ma_format format, ma_uint32 channels, ma_uint32 sampleRate)
+{
+    drwav_data_format wavFormat;
+
+    wavFormat.container     = drwav_container_riff;
+    wavFormat.channels      = channels;
+    wavFormat.sampleRate    = sampleRate;
+    wavFormat.bitsPerSample = ma_get_bytes_per_sample(format) * 8;
+
+    if (format == ma_format_f32) {
+        wavFormat.format = DR_WAVE_FORMAT_IEEE_FLOAT;
+    } else {
+        wavFormat.format = DR_WAVE_FORMAT_PCM;
+    }
+
+    return wavFormat;
+}

tests/test_filtering/ma_test_filtering.c

+#include "../test_common/ma_test_common.c"
+
+#include "ma_test_filtering_dithering.c"
+#include "ma_test_filtering_lpf.c"
+#include "ma_test_filtering_hpf.c"
+#include "ma_test_filtering_bpf.c"
+
+int main(int argc, char** argv)
+{
+    ma_result result;
+    ma_bool32 hasError = MA_FALSE;
+    size_t iTest;
+
+    (void)argc;
+    (void)argv;
+
+    result = ma_register_test("Dithering", test_entry__dithering);
+    if (result != MA_SUCCESS) {
+        hasError = MA_TRUE;
+    }
+
+    result = ma_register_test("Low-Pass Filtering", test_entry__lpf);
+    if (result != MA_SUCCESS) {
+        hasError = MA_TRUE;
+    }
+
+    result = ma_register_test("High-Pass Filtering", test_entry__hpf);
+    if (result != MA_SUCCESS) {
+        hasError = MA_TRUE;
+    }
+
+    result = ma_register_test("Band-Pass Filtering", test_entry__bpf);
+    if (result != MA_SUCCESS) {
+        hasError = MA_TRUE;
+    }
+
+    for (iTest = 0; iTest < g_Tests.count; iTest += 1) {
+        printf("=== BEGIN %s ===\n", g_Tests.pTests[iTest].pName);
+        result = g_Tests.pTests[iTest].onEntry(argc, argv);
+        printf("=== END %s : %s ===\n", g_Tests.pTests[iTest].pName, (result == 0) ? "PASSED" : "FAILED");
+
+        if (result != 0) {
+            hasError = MA_TRUE;
+        }
+    }
+
+    if (hasError) {
+        return -1;  /* Something failed. */
+    } else {
+        return 0;   /* Everything passed. */
+    }
+}

tests/test_filtering/ma_test_filtering_bpf.c

+
+ma_result test_bpf__f32(const char* pInputFilePath)
+{
+    const char* pOutputFilePath = "output/bpf_f32.wav";
+    ma_result result;
+    ma_decoder_config decoderConfig;
+    ma_decoder decoder;
+    drwav_data_format wavFormat;
+    drwav wav;
+    ma_bpf_config bpfConfig;
+    ma_bpf bpf;
+    
+    decoderConfig = ma_decoder_config_init(ma_format_f32, 0, 0);
+    result = ma_decoder_init_file(pInputFilePath, &decoderConfig, &decoder);
+    if (result != MA_SUCCESS) {
+        return result;
+    }
+
+    bpfConfig = ma_bpf_config_init(decoder.outputFormat, decoder.outputChannels, decoder.outputSampleRate, 2000);
+    result = ma_bpf_init(&bpfConfig, &bpf);
+    if (result != MA_SUCCESS) {
+        ma_decoder_uninit(&decoder);
+        return result;
+    }
+
+    wavFormat = drwav_data_format_from_minaudio_format(decoder.outputFormat, decoder.outputChannels, decoder.outputSampleRate);
+    if (!drwav_init_file_write(&wav, pOutputFilePath, &wavFormat, NULL)) {
+        ma_decoder_uninit(&decoder);
+        return MA_ERROR;
+    }
+
+    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_bpf_process_pcm_frames(&bpf, 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;
+}
+
+int test_entry__bpf(int argc, char** argv)
+{
+    ma_result result;
+    ma_bool32 hasError = MA_FALSE;
+    const char* pInputFilePath;
+
+    if (argc < 2) {
+        printf("No input file.\n");
+        return -1;
+    }
+
+    pInputFilePath = argv[1];
+    
+    result = test_bpf__f32(pInputFilePath);
+    if (result != MA_SUCCESS) {
+        hasError = MA_TRUE;
+    }
+
+    if (hasError) {
+        return -1;
+    } else {
+        return 0;
+    }
+}

tests/test_filtering/ma_test_filtering_dithering.c

+
+ma_result test_dithering__u8(const char* pInputFilePath)
+{
+    const char* pOutputFilePath = "output/dithering_u8.wav";
+    ma_result result;
+    ma_decoder_config decoderConfig;
+    ma_decoder decoder;
+    drwav_data_format wavFormat;
+    drwav wav;
+    
+    decoderConfig = ma_decoder_config_init(ma_format_f32, 0, 0);
+    result = ma_decoder_init_file(pInputFilePath, &decoderConfig, &decoder);
+    if (result != MA_SUCCESS) {
+        return result;
+    }
+
+    wavFormat = drwav_data_format_from_minaudio_format(ma_format_u8, decoder.outputChannels, decoder.outputSampleRate);
+    if (!drwav_init_file_write(&wav, pOutputFilePath, &wavFormat, NULL)) {
+        ma_decoder_uninit(&decoder);
+        return MA_ERROR;
+    }
+
+    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(ma_format_u8, decoder.outputChannels);
+        ma_uint64 framesToRead;
+        ma_uint64 framesJustRead;
+
+        framesToRead = ma_min(tempCapIn, tempCapOut);
+        framesJustRead = ma_decoder_read_pcm_frames(&decoder, tempIn, framesToRead);
+
+        /* Convert, with dithering. */
+        ma_convert_pcm_frames_format(tempOut, ma_format_u8, tempIn, decoder.outputFormat, framesJustRead, decoder.outputChannels, ma_dither_mode_triangle);
+
+        /* Write to the WAV file. */
+        drwav_write_pcm_frames(&wav, framesJustRead, tempOut);
+
+        if (framesJustRead < framesToRead) {
+            break;
+        }
+    }
+
+    drwav_uninit(&wav);
+    return MA_SUCCESS;
+}
+
+int test_entry__dithering(int argc, char** argv)
+{
+    ma_result result;
+    ma_bool32 hasError = MA_FALSE;
+    const char* pInputFilePath;
+
+    if (argc < 2) {
+        printf("No input file.\n");
+        return -1;
+    }
+
+    pInputFilePath = argv[1];
+    
+    result = test_dithering__u8(pInputFilePath);
+    if (result != MA_SUCCESS) {
+        hasError = MA_TRUE;
+    }
+
+    if (hasError) {
+        return -1;
+    } else {
+        return 0;
+    }
+}

tests/test_filtering/ma_test_filtering_hpf.c

+
+ma_result test_hpf__f32(const char* pInputFilePath)
+{
+    const char* pOutputFilePath = "output/hpf_f32.wav";
+    ma_result result;
+    ma_decoder_config decoderConfig;
+    ma_decoder decoder;
+    drwav_data_format wavFormat;
+    drwav wav;
+    ma_hpf_config hpfConfig;
+    ma_hpf hpf;
+    
+    decoderConfig = ma_decoder_config_init(ma_format_f32, 0, 0);
+    result = ma_decoder_init_file(pInputFilePath, &decoderConfig, &decoder);
+    if (result != MA_SUCCESS) {
+        return result;
+    }
+
+    hpfConfig = ma_hpf_config_init(decoder.outputFormat, decoder.outputChannels, decoder.outputSampleRate, 2000);
+    result = ma_hpf_init(&hpfConfig, &hpf);
+    if (result != MA_SUCCESS) {
+        ma_decoder_uninit(&decoder);
+        return result;
+    }
+
+    wavFormat = drwav_data_format_from_minaudio_format(decoder.outputFormat, decoder.outputChannels, decoder.outputSampleRate);
+    if (!drwav_init_file_write(&wav, pOutputFilePath, &wavFormat, NULL)) {
+        ma_decoder_uninit(&decoder);
+        return MA_ERROR;
+    }
+
+    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_hpf_process_pcm_frames(&hpf, 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;
+}
+
+int test_entry__hpf(int argc, char** argv)
+{
+    ma_result result;
+    ma_bool32 hasError = MA_FALSE;
+    const char* pInputFilePath;
+
+    if (argc < 2) {
+        printf("No input file.\n");
+        return -1;
+    }
+
+    pInputFilePath = argv[1];
+    
+    result = test_hpf__f32(pInputFilePath);
+    if (result != MA_SUCCESS) {
+        hasError = MA_TRUE;
+    }
+
+    if (hasError) {
+        return -1;
+    } else {
+        return 0;
+    }
+}

tests/test_filtering/ma_test_filtering_lpf.c

+
+ma_result test_lpf__f32(const char* pInputFilePath)
+{
+    const char* pOutputFilePath = "output/lpf_f32.wav";
+    ma_result result;
+    ma_decoder_config decoderConfig;
+    ma_decoder decoder;
+    drwav_data_format wavFormat;
+    drwav wav;
+    ma_lpf_config lpfConfig;
+    ma_lpf lpf;
+    
+    decoderConfig = ma_decoder_config_init(ma_format_f32, 0, 0);
+    result = ma_decoder_init_file(pInputFilePath, &decoderConfig, &decoder);
+    if (result != MA_SUCCESS) {
+        return result;
+    }
+
+    lpfConfig = ma_lpf_config_init(decoder.outputFormat, decoder.outputChannels, decoder.outputSampleRate, 2000);
+    result = ma_lpf_init(&lpfConfig, &lpf);
+    if (result != MA_SUCCESS) {
+        ma_decoder_uninit(&decoder);
+        return result;
+    }
+
+    wavFormat = drwav_data_format_from_minaudio_format(decoder.outputFormat, decoder.outputChannels, decoder.outputSampleRate);
+    if (!drwav_init_file_write(&wav, pOutputFilePath, &wavFormat, NULL)) {
+        ma_decoder_uninit(&decoder);
+        return MA_ERROR;
+    }
+
+    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;
+}
+
+int test_entry__lpf(int argc, char** argv)
+{
+    ma_result result;
+    ma_bool32 hasError = MA_FALSE;
+    const char* pInputFilePath;
+
+    if (argc < 2) {
+        printf("No input file.\n");
+        return -1;
+    }
+
+    pInputFilePath = argv[1];
+    
+    result = test_lpf__f32(pInputFilePath);
+    if (result != MA_SUCCESS) {
+        hasError = MA_TRUE;
+    }
+
+    if (hasError) {
+        return -1;
+    } else {
+        return 0;
+    }
+}

tests/test_generation/ma_test_generation.c

 #include "../test_common/ma_test_common.c"
 
-#define DR_WAV_IMPLEMENTATION
-#include "../../extras/dr_wav.h"
-
-static drwav_data_format drwav_data_format_from_minaudio_format(ma_format format, ma_uint32 channels, ma_uint32 sampleRate)
-{
-    drwav_data_format wavFormat;
-
-    wavFormat.container     = drwav_container_riff;
-    wavFormat.channels      = channels;
-    wavFormat.sampleRate    = sampleRate;
-    wavFormat.bitsPerSample = ma_get_bytes_per_sample(format) * 8;
-
-    if (format == ma_format_f32) {
-        wavFormat.format = DR_WAVE_FORMAT_IEEE_FLOAT;
-    } else {
-        wavFormat.format = DR_WAVE_FORMAT_PCM;
-    }
-
-    return wavFormat;
-}
-
 #include "ma_test_generation_noise.c"
 #include "ma_test_generation_waveform.c"