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Reduce the SDL audio buffer size, 2048 is a bit excessive. Port the changes to the Qt SDL code.

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This commit is contained in:
Henrik Rydgård 2020-05-17 11:50:34 +02:00
parent 67334e4ae7
commit 3f74ffbdf5
2 changed files with 16 additions and 12 deletions
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26
Qt/QtMain.cpp
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@ -48,6 +48,8 @@ static int browseFileEvent = -1;
static int browseFolderEvent = -1;
QTCamera *qtcamera = nullptr;
SDL_AudioSpec g_retFmt;
#ifdef SDL
static SDL_AudioDeviceID audioDev = 0;
@ -56,35 +58,35 @@ extern void mixaudio(void *userdata, Uint8 *stream, int len) {
}
static void InitSDLAudioDevice() {
SDL_AudioSpec fmt, ret_fmt;
SDL_AudioSpec fmt;
memset(&fmt, 0, sizeof(fmt));
fmt.freq = 44100;
fmt.format = AUDIO_S16;
fmt.channels = 2;
fmt.samples = 2048;
fmt.samples = 1024;
fmt.callback = &mixaudio;
fmt.userdata = nullptr;
audioDev = 0;
if (!g_Config.sAudioDevice.empty()) {
audioDev = SDL_OpenAudioDevice(g_Config.sAudioDevice.c_str(), 0, &fmt, &ret_fmt, SDL_AUDIO_ALLOW_FREQUENCY_CHANGE);
audioDev = SDL_OpenAudioDevice(g_Config.sAudioDevice.c_str(), 0, &fmt, &g_retFmt, SDL_AUDIO_ALLOW_FREQUENCY_CHANGE);
if (audioDev <= 0) {
WLOG("Failed to open preferred audio device %s", g_Config.sAudioDevice.c_str());
}
}
if (audioDev <= 0) {
audioDev = SDL_OpenAudioDevice(nullptr, 0, &fmt, &ret_fmt, SDL_AUDIO_ALLOW_FREQUENCY_CHANGE);
audioDev = SDL_OpenAudioDevice(nullptr, 0, &fmt, &g_retFmt, SDL_AUDIO_ALLOW_FREQUENCY_CHANGE);
}
if (audioDev <= 0) {
ELOG("Failed to open audio: %s", SDL_GetError());
} else {
if (ret_fmt.samples != fmt.samples) // Notify, but still use it
ELOG("Output audio samples: %d (requested: %d)", ret_fmt.samples, fmt.samples);
if (ret_fmt.freq != fmt.freq || ret_fmt.format != fmt.format || ret_fmt.channels != fmt.channels) {
if (g_retFmt.samples != fmt.samples) // Notify, but still use it
ELOG("Output audio samples: %d (requested: %d)", g_retFmt.samples, fmt.samples);
if (g_retFmt.format != fmt.format || g_retFmt.channels != fmt.channels) {
ELOG("Sound buffer format does not match requested format.");
ELOG("Output audio freq: %d (requested: %d)", ret_fmt.freq, fmt.freq);
ELOG("Output audio format: %d (requested: %d)", ret_fmt.format, fmt.format);
ELOG("Output audio channels: %d (requested: %d)", ret_fmt.channels, fmt.channels);
ELOG("Output audio freq: %d (requested: %d)", g_retFmt.freq, fmt.freq);
ELOG("Output audio format: %d (requested: %d)", g_retFmt.format, fmt.format);
ELOG("Output audio channels: %d (requested: %d)", g_retFmt.channels, fmt.channels);
ELOG("Provided output format does not match requirement, turning audio off");
SDL_CloseAudioDevice(audioDev);
}
@ -146,7 +148,9 @@ std::string System_GetProperty(SystemProperty prop) {
int System_GetPropertyInt(SystemProperty prop) {
switch (prop) {
case SYSPROP_AUDIO_SAMPLE_RATE:
return 44100;
return g_retFmt.freq;
case SYSPROP_AUDIO_FRAMES_PER_BUFFER:
return g_retFmt.samples;
case SYSPROP_DEVICE_TYPE:
#if defined(__ANDROID__)
return DEVICE_TYPE_MOBILE;

2
SDL/SDLMain.cpp
View File

@ -97,7 +97,7 @@ static void InitSDLAudioDevice(const std::string &name = "") {
fmt.freq = 44100;
fmt.format = AUDIO_S16;
fmt.channels = 2;
fmt.samples = 2048;
fmt.samples = 1024;
fmt.callback = &sdl_mixaudio_callback;
fmt.userdata = nullptr;