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Location: alysbrooks-public/games/isometric-park-fna/FNA/lib/FAudio/utils/testvolumemeter/audio_faudio.cpp - annotation

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Commit Description:
Various UI improvements.
Commit Description:
Various UI improvements.
References:
r291:6a7d5e8510b1 default
File last commit:
r0:e33f209de7e5 default
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FNA/lib/FAudio/utils/testvolumemeter/audio_faudio.cpp
170 lines | 3.8 KiB | text/x-c | CppLexer
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alys
Early working version (including all dependencies, lol).
 r0 #include "audio.h"
#include <FAudio.h>
#include <FAudioFX.h>
#include <FAPO.h>
struct AudioContext
{
FAudio *faudio;
FAudioMasteringVoice *mastering_voice;
FAudioSourceVoice *source_voice;
unsigned int wav_channels;
unsigned int wav_samplerate;
drwav_uint64 wav_sample_count;
float *wav_samples;
FAudioBuffer buffer;
};
void faudio_destroy_context(AudioContext *context)
{
if (context != NULL)
{
FAudioVoice_DestroyVoice(context->source_voice);
FAudioVoice_DestroyVoice(context->mastering_voice);
FAudio_Release(context->faudio);
delete context;
}
}
void faudio_wave_load(AudioContext *context, AudioSampleWave sample, bool stereo)
{
if (context->source_voice)
{
FAudioVoice_DestroyVoice(context->source_voice);
}
/* Buffer data... */
context->wav_samples = WAVS_Open(
sample,
stereo,
&context->wav_channels,
&context->wav_samplerate,
&context->wav_sample_count
);
context->wav_sample_count /= context->wav_channels;
context->buffer.Flags = FAUDIO_END_OF_STREAM;
context->buffer.AudioBytes = 4 * context->wav_sample_count * context->wav_channels;
context->buffer.pAudioData = (uint8_t*) context->wav_samples;
context->buffer.PlayBegin = 0;
context->buffer.PlayLength = context->wav_sample_count;
context->buffer.LoopBegin = 0;
context->buffer.LoopLength = 0;
context->buffer.LoopCount = 0;
context->buffer.pContext = NULL;
/* Volume meter... */
FAPO *fapo = NULL;
uint32_t hr = FAudioCreateVolumeMeter(&fapo, 0);
if (hr != 0)
{
return;
}
/* Effect chain... */
FAudioEffectDescriptor vmDesc;
vmDesc.InitialState = 1;
vmDesc.OutputChannels = context->wav_channels;
vmDesc.pEffect = fapo;
FAudioEffectChain vmChain;
vmChain.EffectCount = 1;
vmChain.pEffectDescriptors = &vmDesc;
/* Wave format... */
FAudioWaveFormatEx waveFormat;
waveFormat.wFormatTag = 3;
waveFormat.nChannels = context->wav_channels;
waveFormat.nSamplesPerSec = context->wav_samplerate;
waveFormat.nAvgBytesPerSec = context->wav_samplerate * 4;
waveFormat.nBlockAlign = context->wav_channels * 4;
waveFormat.wBitsPerSample = 32;
waveFormat.cbSize = 0;
/*... Source voice, finally. */
hr = FAudio_CreateSourceVoice(
context->faudio,
&context->source_voice,
&waveFormat,
0,
FAUDIO_DEFAULT_FREQ_RATIO,
NULL,
NULL,
&vmChain
);
if (hr != 0)
{
return;
}
fapo->Release(fapo);
}
void faudio_wave_play(AudioContext *context)
{
FAudioSourceVoice_Stop(context->source_voice, 0, FAUDIO_COMMIT_NOW);
FAudioSourceVoice_FlushSourceBuffers(context->source_voice);
FAudioSourceVoice_SubmitSourceBuffer(context->source_voice, &context->buffer, NULL);
FAudioSourceVoice_Start(context->source_voice, 0, FAUDIO_COMMIT_NOW);
}
void faudio_update_volumemeter(AudioContext *context, float *peak, float *rms)
{
FAudioFXVolumeMeterLevels levels;
levels.pPeakLevels = peak;
levels.pRMSLevels = rms;
levels.ChannelCount = context->wav_channels;
if (context->source_voice != NULL)
{
FAudioVoice_GetEffectParameters(
context->source_voice,
0,
&levels,
sizeof(levels)
);
}
}
AudioContext* faudio_create_context()
{
// setup function pointers
audio_destroy_context = faudio_destroy_context;
audio_wave_load = faudio_wave_load;
audio_wave_play = faudio_wave_play;
audio_update_volumemeter = faudio_update_volumemeter;
// create FAudio objects
FAudio *faudio;
FAudioMasteringVoice *master;
uint32_t hr = FAudioCreate(&faudio, 0, FAUDIO_DEFAULT_PROCESSOR);
if (hr != 0)
{
return NULL;
}
hr = FAudio_CreateMasteringVoice(
faudio,
&master,
FAUDIO_DEFAULT_CHANNELS,
FAUDIO_DEFAULT_SAMPLERATE,
0,
0,
NULL
);
if (hr != 0)
{
return NULL;
}
// return a context object
AudioContext *context = new AudioContext();
context->faudio = faudio;
context->mastering_voice = master;
context->source_voice = NULL;
context->wav_samples = NULL;
// load the first wave
audio_wave_load(context, (AudioSampleWave) 0, false);
return context;
}