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Update examples.

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This commit is contained in:
David Reid
2020-02-09 14:54:58 +10:00
parent 7aac694905
commit 86a0e65d02
4 changed files with 24 additions and 11 deletions
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examples/README.md
+14 -1
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@@ -6,4 +6,17 @@ will be placed in the "bin" directory.
Then you can run executables like this:
../bin/simple_playback my_sound.wav
../bin/simple_playback my_sound.wav
Emscripten
----------
On Windows, you need to move into the build and run emsdk_env.bat from a command prompt using an absolute
path like "C:\emsdk\emsdk_env.bat". Note that PowerShell doesn't work for me for some reason. Then, run the
relevant batch file:
ma_build_examples_emscripten.bat
The output will be placed in the bin folder. If you have output WASM it may not work when running the web
page locally. To test you can run with something like this:
emrun ../bin/simple_playback_emscripten.html
examples/fixed_size_callback.c
+5 -5
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@@ -33,7 +33,7 @@ void data_callback_fixed(ma_device* pDevice, void* pOutput, const void* pInput,
*/
printf("frameCount=%d\n", frameCount);
ma_sine_wave_read_f32(&g_sineWave, frameCount, (float*)pOutput);
ma_sine_wave_read_pcm_frames(&g_sineWave, pOutput, frameCount, ma_format_f32, pDevice->playback.channels);
/* Unused in this example. */
(void)pDevice;
@@ -48,9 +48,9 @@ void data_callback(ma_device* pDevice, void* pOutput, const void* pInput, ma_uin
*/
ma_uint32 pcmFramesAvailableInRB;
ma_uint32 pcmFramesProcessed = 0;
ma_uint8* pRunningOutput = pOutput;
ma_uint8* pRunningOutput = (ma_uint8*)pOutput;
ma_assert(pDevice->playback.channels == DEVICE_CHANNELS);
MA_ASSERT(pDevice->playback.channels == DEVICE_CHANNELS);
/*
The first thing to do is check if there's enough data available in the ring buffer. If so we can read from it. Otherwise we need to keep filling
@@ -85,7 +85,7 @@ void data_callback(ma_device* pDevice, void* pOutput, const void* pInput, ma_uin
ma_pcm_rb_reset(&g_rb);
ma_pcm_rb_acquire_write(&g_rb, &framesToWrite, &pWriteBuffer);
{
ma_assert(framesToWrite == PCM_FRAME_CHUNK_SIZE); /* <-- This should always work in this example because we just reset the ring buffer. */
MA_ASSERT(framesToWrite == PCM_FRAME_CHUNK_SIZE); /* <-- This should always work in this example because we just reset the ring buffer. */
data_callback_fixed(pDevice, pWriteBuffer, NULL, framesToWrite);
}
ma_pcm_rb_commit_write(&g_rb, framesToWrite, pWriteBuffer);
@@ -102,7 +102,7 @@ int main(int argc, char** argv)
ma_device device;
ma_sine_wave_init(0.2, 400, DEVICE_SAMPLE_RATE, &g_sineWave);
ma_pcm_rb_init(DEVICE_FORMAT, DEVICE_CHANNELS, PCM_FRAME_CHUNK_SIZE, NULL, &g_rb);
ma_pcm_rb_init(DEVICE_FORMAT, DEVICE_CHANNELS, PCM_FRAME_CHUNK_SIZE, NULL, NULL, &g_rb);
deviceConfig = ma_device_config_init(ma_device_type_playback);
deviceConfig.playback.format = DEVICE_FORMAT;
examples/simple_loopback.c
+1 -1
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@@ -18,7 +18,7 @@ properties. The output buffer in the callback will be null whereas the input buf
void data_callback(ma_device* pDevice, void* pOutput, const void* pInput, ma_uint32 frameCount)
{
drwav* pWav = (drwav*)pDevice->pUserData;
ma_assert(pWav != NULL);
MA_ASSERT(pWav != NULL);
drwav_write_pcm_frames(pWav, frameCount, pInput);