diff options
Diffstat (limited to 'docs/examples/src/audio/audio_raw_stream.c')
| -rw-r--r-- | docs/examples/src/audio/audio_raw_stream.c | 29 |
1 files changed, 16 insertions, 13 deletions
diff --git a/docs/examples/src/audio/audio_raw_stream.c b/docs/examples/src/audio/audio_raw_stream.c index c044a7e0..80c83e96 100644 --- a/docs/examples/src/audio/audio_raw_stream.c +++ b/docs/examples/src/audio/audio_raw_stream.c @@ -16,7 +16,8 @@ #include <stdlib.h> // Required for: malloc(), free() #include <math.h> // Required for: sinf() -#define MAX_SAMPLES 20000 +#define MAX_SAMPLES 22050 +#define MAX_SAMPLES_PER_UPDATE 4096 int main() { @@ -29,21 +30,20 @@ int main() InitAudioDevice(); // Initialize audio device - // Init raw audio stream (sample rate: 22050, sample size: 32bit-float, channels: 1-mono) - AudioStream stream = InitAudioStream(22050, 32, 1); + // Init raw audio stream (sample rate: 22050, sample size: 16bit-short, channels: 1-mono) + AudioStream stream = InitAudioStream(22050, 16, 1); - // Fill audio stream with some samples (sine wave) - float *data = (float *)malloc(sizeof(float)*MAX_SAMPLES); + // Generate samples data from sine wave + short *data = (short *)malloc(sizeof(short)*MAX_SAMPLES); + // TODO: Review data generation, it seems data is discontinued for loop, + // for that reason, there is a clip everytime audio stream is looped... for (int i = 0; i < MAX_SAMPLES; i++) { - data[i] = sinf(((2*PI*(float)i)/2)*DEG2RAD); + data[i] = (short)(sinf(((2*PI*(float)i)/2)*DEG2RAD)*32000); } - // NOTE: The generated MAX_SAMPLES do not fit to close a perfect loop - // for that reason, there is a clip everytime audio stream is looped - - PlayAudioStream(stream); + PlayAudioStream(stream); // Start processing stream buffer (no data loaded currently) int totalSamples = MAX_SAMPLES; int samplesLeft = totalSamples; @@ -60,10 +60,13 @@ int main() //---------------------------------------------------------------------------------- // Refill audio stream if required + // NOTE: Every update we check if stream data has been already consumed and we update + // buffer with new data from the generated samples, we upload data at a rate (MAX_SAMPLES_PER_UPDATE), + // but notice that at some point we update < MAX_SAMPLES_PER_UPDATE data... if (IsAudioBufferProcessed(stream)) { int numSamples = 0; - if (samplesLeft >= 4096) numSamples = 4096; + if (samplesLeft >= MAX_SAMPLES_PER_UPDATE) numSamples = MAX_SAMPLES_PER_UPDATE; else numSamples = samplesLeft; UpdateAudioStream(stream, data + (totalSamples - samplesLeft), numSamples); @@ -83,11 +86,11 @@ int main() DrawText("SINE WAVE SHOULD BE PLAYING!", 240, 140, 20, LIGHTGRAY); - // NOTE: Draw a part of the sine wave (only screen width) + // NOTE: Draw a part of the sine wave (only screen width, proportional values) for (int i = 0; i < GetScreenWidth(); i++) { position.x = i; - position.y = 250 + 50*data[i]; + position.y = 250 + 50*data[i]/32000; DrawPixelV(position, RED); } |