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for audio, use returned value for silence, and use unsigned instead of signed bytes

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This commit is contained in:
Christopher Mosher 2012-04-23 22:55:28 -04:00
parent 60f968c5f0
commit 8a51b28651
1 changed files with 8 additions and 7 deletions
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15
src/speakerclicker.cpp
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@ -25,6 +25,7 @@ std::deque<char> locbuf;
volatile bool done;
SDL_cond* bufchg;
SDL_mutex* buflck;
volatile int silence;
// TODO figure out why sound is so choppy, and fix it
void fillbuf(void *userdata, Uint8 *stream, int len)
@ -70,7 +71,6 @@ void fillbuf(void *userdata, Uint8 *stream, int len)
}
#define TICKS_PER_SAMPLE 47
#define AMP 126
SpeakerClicker::SpeakerClicker():
clicked(false),
@ -80,7 +80,7 @@ SpeakerClicker::SpeakerClicker():
SDL_AudioSpec audio;
audio.freq = 22050; // samples per second
audio.format = AUDIO_S8; // 8 bits (1 byte) per sample
audio.format = AUDIO_U8; // 8 bits (1 byte) per sample
audio.channels = 1; // mono
audio.silence = 0;
audio.samples = 4096;
@ -98,15 +98,16 @@ SpeakerClicker::SpeakerClicker():
{
bufchg = SDL_CreateCond();
buflck = SDL_CreateMutex();
/*
silence = obtained.silence;
/*
std::cout << "initialized audio: " << std::endl;
std::cout << "freq: " << obtained.freq << std::endl;
std::cout << "format: " << (obtained.format==AUDIO_S8?"8-bit":"other") << std::endl;
std::cout << "format: " << obtained.format << std::endl;
std::cout << "channels: " << (int)obtained.channels << std::endl;
std::cout << "silence: " << (int)obtained.silence << std::endl;
std::cout << "samples: " << obtained.samples << std::endl;
std::cout << "size: " << obtained.size << std::endl;
*/
*/
SDL_PauseAudio(0);
}
}
@ -141,13 +142,13 @@ void SpeakerClicker::tick()
int amp;
if (this->clicked)
{
amp = this->positive ? AMP : -AMP;
amp = this->positive ? silence+100 : silence-100;
this->positive = !this->positive;
this->clicked = false;
}
else
{
amp = 0;
amp = silence;
}
SDL_LockMutex(buflck);
locbuf.push_back(amp);