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pause on no data

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This commit is contained in:
Joshua Reisenauer
2016-05-03 02:52:45 -07:00
parent 9d09ada33b
commit d6feeb14ff
2 changed files with 32 additions and 16 deletions
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31
src/audio.c
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@ -114,11 +114,10 @@ typedef enum { INFO = 0, ERROR, WARNING, DEBUG, OTHER } TraceLogType;
//----------------------------------------------------------------------------------
// Global Variables Definition
//----------------------------------------------------------------------------------
static AudioContext_t* mixChannelsActive_g[MAX_AUDIO_CONTEXTS]; // What mix channels are currently active
static AudioContext_t* mixChannelsActive_g[MAX_AUDIO_CONTEXTS]; // What mix channels are currently active
static bool musicEnabled = false;
static Music currentMusic; // Current music loaded
// NOTE: Only one music file playing at a time
//----------------------------------------------------------------------------------
// Module specific Functions Declaration
//----------------------------------------------------------------------------------
@ -286,34 +285,34 @@ void CloseAudioContext(AudioContext ctx)
}
// Pushes more audio data into context mix channel, if none are ever pushed then zeros are fed in.
// Call "UpdateAudioContext(ctx, NULL, 0)" every game tick if you want to pause the audio.
// Call "UpdateAudioContext(ctx, NULL, 0)" if you want to pause the audio.
// @Returns number of samples that where processed.
// All data streams should be of a length that is evenly divisible by MUSIC_BUFFER_SIZE,
// otherwise the remaining data will not be pushed.
unsigned short UpdateAudioContext(AudioContext ctx, void *data, unsigned short numberElements)
{
unsigned short numberProcessed = 0;
unsigned short numberRemaining = numberElements;
AudioContext_t *context = (AudioContext_t*)ctx;
if(context && context->channels == 2 && numberElements % 2 != 0) return 0; // when there is two channels there must be an even number of samples
if (!data || !numberElements) alSourcePause(context->alSource); // pauses audio until data is given
else{ // restart audio otherwise
ALint state;
alGetSourcei(context->alSource, AL_SOURCE_STATE, &state);
if (state != AL_PLAYING) alSourcePlay(context->alSource);
}
if (context && mixChannelsActive_g[context->mixChannel] == context)
{
ALint processed = 0;
ALuint buffer = 0;
alGetSourcei(context->alSource, AL_BUFFERS_PROCESSED, &processed); // Get the number of already processed buffers (if any)
unsigned short numberProcessed = 0;
unsigned short numberRemaining = numberElements;
alGetSourcei(context->alSource, AL_BUFFERS_PROCESSED, &processed); // Get the number of already processed buffers (if any)
if(!processed) return 0;//nothing to process, queue is still full
if (!data || !numberElements)// play silence
{
while (processed > 0)
{
alSourceUnqueueBuffers(context->alSource, 1, &buffer);
numberProcessed += FillAlBufferWithSilence(context, buffer);
alSourceQueueBuffers(context->alSource, 1, &buffer);
processed--;
}
}
if(numberRemaining)// buffer data stream in increments of MUSIC_BUFFER_SIZE
{
while (processed > 0)