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Downmix surround 5.1 to stereo

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This commit is contained in:
loki
2021-05-14 21:44:20 +02:00
parent 3901e404a9
commit 33a330fd6c
5 changed files with 305 additions and 129 deletions
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171
tools/audio.cpp
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@@ -26,7 +26,9 @@ const IID IID_IMMDeviceEnumerator = __uuidof(IMMDeviceEnumerator);
const IID IID_IAudioClient = __uuidof(IAudioClient);
const IID IID_IAudioCaptureClient = __uuidof(IAudioCaptureClient);
constexpr auto SAMPLE_RATE = 48000;
int device_state_filter = DEVICE_STATE_ACTIVE;
namespace audio {
template<class T>
void Release(T *p) {
@@ -66,19 +68,114 @@ public:
const wchar_t *no_null(const wchar_t *str) {
return str ? str : L"Unknown";
}
void print_device(device_t &device) {
HRESULT status;
audio::wstring_t::pointer wstring_p {};
struct format_t {
std::string_view name;
int channels;
int channel_mask;
} formats [] {
{
"Mono"sv,
1,
SPEAKER_FRONT_CENTER
},
{
"Stereo"sv,
2,
SPEAKER_FRONT_LEFT | SPEAKER_FRONT_RIGHT
},
{
"Surround 5.1"sv,
6,
SPEAKER_FRONT_LEFT |
SPEAKER_FRONT_RIGHT |
SPEAKER_FRONT_CENTER |
SPEAKER_LOW_FREQUENCY |
SPEAKER_BACK_LEFT |
SPEAKER_BACK_RIGHT
}
};
void set_wave_format(audio::wave_format_t &wave_format, const format_t &format) {
wave_format->nChannels = format.channels;
wave_format->nBlockAlign = wave_format->nChannels * wave_format->wBitsPerSample / 8;
wave_format->nAvgBytesPerSec = wave_format->nSamplesPerSec * wave_format->nBlockAlign;
if(wave_format->wFormatTag == WAVE_FORMAT_EXTENSIBLE) {
((PWAVEFORMATEXTENSIBLE)wave_format.get())->dwChannelMask = format.channel_mask;
}
}
audio_client_t make_audio_client(device_t &device, const format_t &format) {
audio_client_t audio_client;
auto status = device->Activate(
IID_IAudioClient,
CLSCTX_ALL,
nullptr,
(void **) &audio_client);
if(FAILED(status)) {
std::cout << "Couldn't activate Device: [0x"sv << util::hex(status).to_string_view() << ']' << std::endl;
return nullptr;
}
wave_format_t wave_format;
status = audio_client->GetMixFormat(&wave_format);
if (FAILED(status)) {
std::cout << "Couldn't acquire Wave Format [0x"sv << util::hex(status).to_string_view() << ']' << std::endl;
return nullptr;
}
wave_format->wBitsPerSample = 16;
wave_format->nSamplesPerSec = SAMPLE_RATE;
switch(wave_format->wFormatTag) {
case WAVE_FORMAT_PCM:
break;
case WAVE_FORMAT_IEEE_FLOAT:
break;
case WAVE_FORMAT_EXTENSIBLE: {
auto wave_ex = (PWAVEFORMATEXTENSIBLE) wave_format.get();
if (IsEqualGUID(KSDATAFORMAT_SUBTYPE_IEEE_FLOAT, wave_ex->SubFormat)) {
wave_ex->SubFormat = KSDATAFORMAT_SUBTYPE_PCM;
wave_ex->Samples.wValidBitsPerSample = 16;
break;
}
std::cout << "Unsupported Sub Format for WAVE_FORMAT_EXTENSIBLE: [0x"sv << util::hex(wave_ex->SubFormat).to_string_view() << ']' << std::endl;
}
default:
std::cout << "Unsupported Wave Format: [0x"sv << util::hex(wave_format->wFormatTag).to_string_view() << ']' << std::endl;
return nullptr;
};
set_wave_format(wave_format, format);
status = audio_client->Initialize(
AUDCLNT_SHAREMODE_SHARED,
AUDCLNT_STREAMFLAGS_LOOPBACK | AUDCLNT_STREAMFLAGS_EVENTCALLBACK,
0, 0,
wave_format.get(),
nullptr);
if(status) {
return nullptr;
}
return audio_client;
}
void print_device(device_t &device) {
audio::wstring_t wstring;
DWORD device_state;
device->GetState(&device_state);
device->GetId(&wstring_p);
audio::wstring_t wstring { wstring_p };
device->GetId(&wstring);
audio::prop_t::pointer prop_p {};
device->OpenPropertyStore(STGM_READ, &prop_p);
audio::prop_t prop { prop_p };
audio::prop_t prop;
device->OpenPropertyStore(STGM_READ, &prop);
prop_var_t adapter_friendly_name;
prop_var_t device_friendly_name;
@@ -120,47 +217,12 @@ void print_device(device_t &device) {
return;
}
// Ensure WaveFromat is compatible
audio_client_t::pointer audio_client_p{};
status = device->Activate(
IID_IAudioClient,
CLSCTX_ALL,
nullptr,
(void **) &audio_client_p);
audio_client_t audio_client { audio_client_p };
for(const auto &format : formats) {
// Ensure WaveFromat is compatible
auto audio_client = make_audio_client(device, format);
if (FAILED(status)) {
std::cout << "Couldn't activate Device: [0x"sv << util::hex(status).to_string_view() << ']' << std::endl;
return;
std::cout << format.name << ": "sv << (!audio_client ? "unsupported"sv : "supported"sv) << std::endl;
}
wave_format_t::pointer wave_format_p{};
status = audio_client->GetMixFormat(&wave_format_p);
wave_format_t wave_format { wave_format_p };
if (FAILED(status)) {
std::cout << "Couldn't acquire Wave Format [0x"sv << util::hex(status).to_string_view() << ']' << std::endl;
return;
}
switch(wave_format->wFormatTag) {
case WAVE_FORMAT_PCM:
break;
case WAVE_FORMAT_IEEE_FLOAT:
break;
case WAVE_FORMAT_EXTENSIBLE: {
auto wave_ex = (PWAVEFORMATEXTENSIBLE) wave_format.get();
if (IsEqualGUID(KSDATAFORMAT_SUBTYPE_IEEE_FLOAT, wave_ex->SubFormat)) {
break;
}
std::cout << "Unsupported Sub Format for WAVE_FORMAT_EXTENSIBLE: [0x"sv << util::hex(wave_ex->SubFormat).to_string_view() << ']' << std::endl;
}
default:
std::cout << "Unsupported Wave Format: [0x"sv << util::hex(wave_format->wFormatTag).to_string_view() << ']' << std::endl;
};
}
}
@@ -213,14 +275,13 @@ int main(int argc, char *argv[]) {
HRESULT status;
audio::device_enum_t::pointer device_enum_p{};
audio::device_enum_t device_enum;
status = CoCreateInstance(
CLSID_MMDeviceEnumerator,
nullptr,
CLSCTX_ALL,
IID_IMMDeviceEnumerator,
(void **) &device_enum_p);
audio::device_enum_t device_enum { device_enum_p };
(void **) &device_enum);
if (FAILED(status)) {
std::cout << "Couldn't create Device Enumerator: [0x"sv << util::hex(status).to_string_view() << ']' << std::endl;
@@ -228,9 +289,8 @@ int main(int argc, char *argv[]) {
return -1;
}
audio::collection_t::pointer collection_p {};
status = device_enum->EnumAudioEndpoints(eRender, DEVICE_STATEMASK_ALL, &collection_p);
audio::collection_t collection { collection_p };
audio::collection_t collection;
status = device_enum->EnumAudioEndpoints(eRender, DEVICE_STATEMASK_ALL, &collection);
if (FAILED(status)) {
std::cout << "Couldn't enumerate: [0x"sv << util::hex(status).to_string_view() << ']' << std::endl;
@@ -243,9 +303,8 @@ int main(int argc, char *argv[]) {
std::cout << "====== Found "sv << count << " potential audio devices ======"sv << std::endl;
for(auto x = 0; x < count; ++x) {
audio::device_t::pointer device_p {};
collection->Item(x, &device_p);
audio::device_t device { device_p };
audio::device_t device;
collection->Item(x, &device);
audio::print_device(device);
}