diff options
Diffstat (limited to 'docs/examples/web/audio_raw_stream.c')
| -rw-r--r-- | docs/examples/web/audio_raw_stream.c | 136 |
1 files changed, 83 insertions, 53 deletions
diff --git a/docs/examples/web/audio_raw_stream.c b/docs/examples/web/audio_raw_stream.c index 80c83e96..e3b4ad60 100644 --- a/docs/examples/web/audio_raw_stream.c +++ b/docs/examples/web/audio_raw_stream.c @@ -13,28 +13,51 @@ #include "raylib.h" +#if defined(PLATFORM_WEB) + #include <emscripten/emscripten.h> +#endif + #include <stdlib.h> // Required for: malloc(), free() #include <math.h> // Required for: sinf() #define MAX_SAMPLES 22050 #define MAX_SAMPLES_PER_UPDATE 4096 +//---------------------------------------------------------------------------------- +// Global Variables Definition +//---------------------------------------------------------------------------------- +const int screenWidth = 800; +const int screenHeight = 450; + +AudioStream stream; +short *data; + +int totalSamples = MAX_SAMPLES; +int samplesLeft = MAX_SAMPLES; + +Vector2 position = { 0, 0 }; + +//---------------------------------------------------------------------------------- +// Module Functions Declaration +//---------------------------------------------------------------------------------- +void UpdateDrawFrame(void); // Update and Draw one frame + +//---------------------------------------------------------------------------------- +// Main Enry Point +//---------------------------------------------------------------------------------- int main() { // Initialization //-------------------------------------------------------------------------------------- - int screenWidth = 800; - int screenHeight = 450; - InitWindow(screenWidth, screenHeight, "raylib [audio] example - raw audio streaming"); InitAudioDevice(); // Initialize audio device // Init raw audio stream (sample rate: 22050, sample size: 16bit-short, channels: 1-mono) - AudioStream stream = InitAudioStream(22050, 16, 1); + stream = InitAudioStream(22050, 16, 1); // Generate samples data from sine wave - short *data = (short *)malloc(sizeof(short)*MAX_SAMPLES); + 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... @@ -45,59 +68,18 @@ int main() PlayAudioStream(stream); // Start processing stream buffer (no data loaded currently) - int totalSamples = MAX_SAMPLES; - int samplesLeft = totalSamples; - - Vector2 position = { 0, 0 }; - - SetTargetFPS(30); // Set our game to run at 30 frames-per-second +#if defined(PLATFORM_WEB) + emscripten_set_main_loop(UpdateDrawFrame, 0, 1); +#else + SetTargetFPS(60); // Set our game to run at 60 frames-per-second //-------------------------------------------------------------------------------------- - + // Main game loop while (!WindowShouldClose()) // Detect window close button or ESC key { - // Update - //---------------------------------------------------------------------------------- - - // 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 >= MAX_SAMPLES_PER_UPDATE) numSamples = MAX_SAMPLES_PER_UPDATE; - else numSamples = samplesLeft; - - UpdateAudioStream(stream, data + (totalSamples - samplesLeft), numSamples); - - samplesLeft -= numSamples; - - // Reset samples feeding (loop audio) - if (samplesLeft <= 0) samplesLeft = totalSamples; - } - //---------------------------------------------------------------------------------- - - // Draw - //---------------------------------------------------------------------------------- - BeginDrawing(); - - ClearBackground(RAYWHITE); - - DrawText("SINE WAVE SHOULD BE PLAYING!", 240, 140, 20, LIGHTGRAY); - - // 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]/32000; - - DrawPixelV(position, RED); - } - - EndDrawing(); - //---------------------------------------------------------------------------------- + UpdateDrawFrame(); } +#endif // De-Initialization //-------------------------------------------------------------------------------------- @@ -111,4 +93,52 @@ int main() //-------------------------------------------------------------------------------------- return 0; +} + +//---------------------------------------------------------------------------------- +// Module Functions Definition +//---------------------------------------------------------------------------------- +void UpdateDrawFrame(void) +{ + // Update + //---------------------------------------------------------------------------------- + + // 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 >= MAX_SAMPLES_PER_UPDATE) numSamples = MAX_SAMPLES_PER_UPDATE; + else numSamples = samplesLeft; + + UpdateAudioStream(stream, data + (totalSamples - samplesLeft), numSamples); + + samplesLeft -= numSamples; + + // Reset samples feeding (loop audio) + if (samplesLeft <= 0) samplesLeft = totalSamples; + } + //---------------------------------------------------------------------------------- + + // Draw + //---------------------------------------------------------------------------------- + BeginDrawing(); + + ClearBackground(RAYWHITE); + + DrawText("SINE WAVE SHOULD BE PLAYING!", 240, 140, 20, LIGHTGRAY); + + // 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]/32000; + + DrawPixelV(position, RED); + } + + EndDrawing(); + //---------------------------------------------------------------------------------- }
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