Add testing code for peaking filter.

tests/test_filtering/ma_test_filtering_peak.c

+ma_result peak_init_decoder_and_encoder(const char* pInputFilePath, const char* pOutputFilePath, ma_format format, ma_decoder* pDecoder, ma_encoder* pEncoder)
+{
+    return filtering_init_decoder_and_encoder(pInputFilePath, pOutputFilePath, format, 0, 0, pDecoder, pEncoder);
+}
+
+
+ma_result test_peak2__by_format(const char* pInputFilePath, const char* pOutputFilePath, ma_format format)
+{
+    ma_result result;
+    ma_decoder decoder;
+    ma_encoder encoder;
+    ma_peak2_config peakConfig;
+    ma_peak2 peak;
+
+    printf("    %s\n", pOutputFilePath);
+
+    result = peak_init_decoder_and_encoder(pInputFilePath, pOutputFilePath, format, &decoder, &encoder);
+    if (result != MA_SUCCESS) {
+        return result;
+    }
+
+    peakConfig = ma_peak2_config_init(decoder.outputFormat, decoder.outputChannels, decoder.outputSampleRate, 24, 0, 16000);
+    result = ma_peak2_init(&peakConfig, &peak);
+    if (result != MA_SUCCESS) {
+        ma_decoder_uninit(&decoder);
+        ma_encoder_uninit(&encoder);
+        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_peak2_process_pcm_frames(&peak, tempOut, tempIn, framesJustRead);
+
+        /* Write to the WAV file. */
+        ma_encoder_write_pcm_frames(&encoder, tempOut, framesJustRead);
+
+        if (framesJustRead < framesToRead) {
+            break;
+        }
+    }
+
+    ma_encoder_uninit(&encoder);
+    return MA_SUCCESS;
+}
+
+ma_result test_peak2__f32(const char* pInputFilePath)
+{
+    return test_peak2__by_format(pInputFilePath, "output/peak2_f32.wav", ma_format_f32);
+}
+
+ma_result test_peak2__s16(const char* pInputFilePath)
+{
+    return test_peak2__by_format(pInputFilePath, "output/peak2_s16.wav", ma_format_s16);
+}
+
+#if 0
+ma_result test_peak4__by_format(const char* pInputFilePath, const char* pOutputFilePath, ma_format format)
+{
+    ma_result result;
+    ma_decoder decoder;
+    ma_encoder encoder;
+    ma_peak_config peakConfig;
+    ma_peak peak;
+
+    printf("    %s\n", pOutputFilePath);
+
+    result = peak_init_decoder_and_encoder(pInputFilePath, pOutputFilePath, format, &decoder, &encoder);
+    if (result != MA_SUCCESS) {
+        return result;
+    }
+
+    peakConfig = ma_peak_config_init(decoder.outputFormat, decoder.outputChannels, decoder.outputSampleRate, 2000, 4);
+    result = ma_peak_init(&peakConfig, &peak);
+    if (result != MA_SUCCESS) {
+        ma_decoder_uninit(&decoder);
+        ma_encoder_uninit(&encoder);
+        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_peak_process_pcm_frames(&peak, tempOut, tempIn, framesJustRead);
+
+        /* Write to the WAV file. */
+        ma_encoder_write_pcm_frames(&encoder, tempOut, framesJustRead);
+
+        if (framesJustRead < framesToRead) {
+            break;
+        }
+    }
+
+    ma_encoder_uninit(&encoder);
+    return MA_SUCCESS;
+}
+
+ma_result test_peak4__f32(const char* pInputFilePath)
+{
+    return test_peak4__by_format(pInputFilePath, "output/peak4_f32.wav", ma_format_f32);
+}
+
+ma_result test_peak4__s16(const char* pInputFilePath)
+{
+    return test_peak4__by_format(pInputFilePath, "output/peak4_s16.wav", ma_format_s16);
+}
+#endif
+
+int test_entry__peak(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_peak2__f32(pInputFilePath);
+    if (result != MA_SUCCESS) {
+        hasError = MA_TRUE;
+    }
+
+    result = test_peak2__s16(pInputFilePath);
+    if (result != MA_SUCCESS) {
+        hasError = MA_TRUE;
+    }
+
+#if 0
+    result = test_peak4__f32(pInputFilePath);
+    if (result != MA_SUCCESS) {
+        hasError = MA_TRUE;
+    }
+
+    result = test_peak4__s16(pInputFilePath);
+    if (result != MA_SUCCESS) {
+        hasError = MA_TRUE;
+    }
+#endif
+
+    if (hasError) {
+        return -1;
+    } else {
+        return 0;
+    }
+}