/**************************************************************************/
/* test_audio_stream_wav.h */
/**************************************************************************/
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/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */
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#ifndef TEST_AUDIO_STREAM_WAV_H
#define TEST_AUDIO_STREAM_WAV_H
#include "core/math/math_defs.h"
#include "core/math/math_funcs.h"
#include "scene/resources/audio_stream_wav.h"
#include "tests/test_macros.h"
#ifdef TOOLS_ENABLED
#include "core/io/resource_loader.h"
#include "editor/import/resource_importer_wav.h"
#endif
namespace TestAudioStreamWAV {
// Default wav rate for test cases.
constexpr float WAV_RATE = 44100;
/* Default wav count for test cases. 1 second of audio is used so that the file can be listened
to manually if needed. */
constexpr int WAV_COUNT = WAV_RATE;
float gen_wav(float frequency, float wav_rate, int wav_number) {
// formula for generating a sin wave with given frequency.
return Math::sin((Math_TAU * frequency / wav_rate) * wav_number);
}
/* Generates a 440Hz sin wave in channel 0 (mono channel or left stereo channel)
* and a 261.63Hz wave in channel 1 (right stereo channel).
* These waves correspond to the music notes A4 and C4 respectively.
*/
Vector<uint8_t> gen_pcm8_test(float wav_rate, int wav_count, bool stereo) {
Vector<uint8_t> buffer;
buffer.resize(stereo ? wav_count * 2 : wav_count);
uint8_t *write_ptr = buffer.ptrw();
for (int i = 0; i < buffer.size(); i++) {
float wav;
if (stereo) {
if (i % 2 == 0) {
wav = gen_wav(440, wav_rate, i / 2);
} else {
wav = gen_wav(261.63, wav_rate, i / 2);
}
} else {
wav = gen_wav(440, wav_rate, i);
}
// Map sin wave to full range of 8-bit values.
uint8_t wav_8bit = Math::fast_ftoi(((wav + 1) / 2) * UINT8_MAX);
// Unlike the .wav format, AudioStreamWAV expects signed 8-bit wavs.
uint8_t wav_8bit_signed = wav_8bit - (INT8_MAX + 1);
write_ptr[i] = wav_8bit_signed;
}
return buffer;
}
// Same as gen_pcm8_test but with 16-bit wavs.
Vector<uint8_t> gen_pcm16_test(float wav_rate, int wav_count, bool stereo) {
Vector<uint8_t> buffer;
buffer.resize(stereo ? wav_count * 4 : wav_count * 2);
uint8_t *write_ptr = buffer.ptrw();
for (int i = 0; i < buffer.size() / 2; i++) {
float wav;
if (stereo) {
if (i % 2 == 0) {
wav = gen_wav(440, wav_rate, i / 2);
} else {
wav = gen_wav(261.63, wav_rate, i / 2);
}
} else {
wav = gen_wav(440, wav_rate, i);
}
// Map sin wave to full range of 16-bit values.
uint16_t wav_16bit = Math::fast_ftoi(((wav + 1) / 2) * UINT16_MAX);
// The .wav format expects wavs larger than 8 bits to be signed.
uint16_t wav_16bit_signed = wav_16bit - (INT16_MAX + 1);
encode_uint16(wav_16bit_signed, write_ptr + (i * 2));
}
return buffer;
}
void run_test(String file_name, AudioStreamWAV::Format data_format, bool stereo, float wav_rate, float wav_count) {
String save_path = TestUtils::get_temp_path(file_name);
Vector<uint8_t> test_data;
if (data_format == AudioStreamWAV::FORMAT_8_BITS) {
test_data = gen_pcm8_test(wav_rate, wav_count, stereo);
} else {
test_data = gen_pcm16_test(wav_rate, wav_count, stereo);
}
Ref<AudioStreamWAV> stream = memnew(AudioStreamWAV);
stream->set_mix_rate(wav_rate);
CHECK(stream->get_mix_rate() == wav_rate);
stream->set_format(data_format);
CHECK(stream->get_format() == data_format);
stream->set_stereo(stereo);
CHECK(stream->is_stereo() == stereo);
stream->set_data(test_data);
CHECK(stream->get_data() == test_data);
SUBCASE("Stream length is computed properly") {
CHECK(stream->get_length() == doctest::Approx(double(wav_count / wav_rate)));
}
SUBCASE("Stream can be saved as .wav") {
REQUIRE(stream->save_to_wav(save_path) == OK);
Error error;
Ref<FileAccess> wav_file = FileAccess::open(save_path, FileAccess::READ, &error);
REQUIRE(error == OK);
#ifdef TOOLS_ENABLED
// The WAV importer can be used if enabled to check that the saved file is valid.
Ref<ResourceImporterWAV> wav_importer = memnew(ResourceImporterWAV);
List<ResourceImporter::ImportOption> options_list;
wav_importer->get_import_options("", &options_list);
HashMap<StringName, Variant> options_map;
for (const ResourceImporter::ImportOption &E : options_list) {
options_map[E.option.name] = E.default_value;
}
// Compressed streams can't be saved, disable compression.
options_map["compress/mode"] = 0;
REQUIRE(wav_importer->import(save_path, save_path, options_map, nullptr) == OK);
String load_path = save_path + "." + wav_importer->get_save_extension();
Ref<AudioStreamWAV> loaded_stream = ResourceLoader::load(load_path, "AudioStreamWAV", ResourceFormatImporter::CACHE_MODE_IGNORE, &error);
REQUIRE(error == OK);
CHECK(loaded_stream->get_format() == stream->get_format());
CHECK(loaded_stream->get_loop_mode() == stream->get_loop_mode());
CHECK(loaded_stream->get_loop_begin() == stream->get_loop_begin());
CHECK(loaded_stream->get_loop_end() == stream->get_loop_end());
CHECK(loaded_stream->get_mix_rate() == stream->get_mix_rate());
CHECK(loaded_stream->is_stereo() == stream->is_stereo());
CHECK(loaded_stream->get_length() == stream->get_length());
CHECK(loaded_stream->is_monophonic() == stream->is_monophonic());
CHECK(loaded_stream->get_data() == stream->get_data());
#endif
}
}
TEST_CASE("[AudioStreamWAV] Mono PCM8 format") {
run_test("test_pcm8_mono.wav", AudioStreamWAV::FORMAT_8_BITS, false, WAV_RATE, WAV_COUNT);
}
TEST_CASE("[AudioStreamWAV] Mono PCM16 format") {
run_test("test_pcm16_mono.wav", AudioStreamWAV::FORMAT_16_BITS, false, WAV_RATE, WAV_COUNT);
}
TEST_CASE("[AudioStreamWAV] Stereo PCM8 format") {
run_test("test_pcm8_stereo.wav", AudioStreamWAV::FORMAT_8_BITS, true, WAV_RATE, WAV_COUNT);
}
TEST_CASE("[AudioStreamWAV] Stereo PCM16 format") {
run_test("test_pcm16_stereo.wav", AudioStreamWAV::FORMAT_16_BITS, true, WAV_RATE, WAV_COUNT);
}
TEST_CASE("[AudioStreamWAV] Alternate mix rate") {
run_test("test_pcm16_stereo_38000Hz.wav", AudioStreamWAV::FORMAT_16_BITS, true, 38000, 38000);
}
TEST_CASE("[AudioStreamWAV] save_to_wav() adds '.wav' file extension automatically") {
String save_path = TestUtils::get_temp_path("test_wav_extension");
Vector<uint8_t> test_data = gen_pcm8_test(WAV_RATE, WAV_COUNT, false);
Ref<AudioStreamWAV> stream = memnew(AudioStreamWAV);
stream->set_data(test_data);
REQUIRE(stream->save_to_wav(save_path) == OK);
Error error;
Ref<FileAccess> wav_file = FileAccess::open(save_path + ".wav", FileAccess::READ, &error);
CHECK(error == OK);
}
TEST_CASE("[AudioStreamWAV] Default values") {
Ref<AudioStreamWAV> stream = memnew(AudioStreamWAV);
CHECK(stream->get_format() == AudioStreamWAV::FORMAT_8_BITS);
CHECK(stream->get_loop_mode() == AudioStreamWAV::LOOP_DISABLED);
CHECK(stream->get_loop_begin() == 0);
CHECK(stream->get_loop_end() == 0);
CHECK(stream->get_mix_rate() == 44100);
CHECK(stream->is_stereo() == false);
CHECK(stream->get_length() == 0);
CHECK(stream->is_monophonic() == false);
CHECK(stream->get_data() == Vector<uint8_t>{});
CHECK(stream->get_stream_name() == "");
}
TEST_CASE("[AudioStreamWAV] Save empty file") {
run_test("test_empty.wav", AudioStreamWAV::FORMAT_8_BITS, false, WAV_RATE, 0);
}
TEST_CASE("[AudioStreamWAV] Saving IMA ADPCM is not supported") {
String save_path = TestUtils::get_temp_path("test_adpcm.wav");
Ref<AudioStreamWAV> stream = memnew(AudioStreamWAV);
stream->set_format(AudioStreamWAV::FORMAT_IMA_ADPCM);
ERR_PRINT_OFF;
CHECK(stream->save_to_wav(save_path) == ERR_UNAVAILABLE);
ERR_PRINT_ON;
}
} // namespace TestAudioStreamWAV
#endif // TEST_AUDIO_STREAM_WAV_H
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