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/*
* OpenAL Source Latency Example
*
* Copyright (c) 2012 by Chris Robinson <chris.kcat@gmail.com>
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
/* This file contains an example for checking the latency of a sound. */
#include <stdio.h>
#include <assert.h>
#include "AL/al.h"
#include "AL/alc.h"
#include "AL/alext.h"
#include "common/alhelpers.h"
#include "common/sdl_sound.h"
static LPALBUFFERSAMPLESSOFT alBufferSamplesSOFT = wrap_BufferSamples;
static LPALISBUFFERFORMATSUPPORTEDSOFT alIsBufferFormatSupportedSOFT;
static LPALSOURCEDSOFT alSourcedSOFT;
static LPALSOURCE3DSOFT alSource3dSOFT;
static LPALSOURCEDVSOFT alSourcedvSOFT;
static LPALGETSOURCEDSOFT alGetSourcedSOFT;
static LPALGETSOURCE3DSOFT alGetSource3dSOFT;
static LPALGETSOURCEDVSOFT alGetSourcedvSOFT;
static LPALSOURCEI64SOFT alSourcei64SOFT;
static LPALSOURCE3I64SOFT alSource3i64SOFT;
static LPALSOURCEI64VSOFT alSourcei64vSOFT;
static LPALGETSOURCEI64SOFT alGetSourcei64SOFT;
static LPALGETSOURCE3I64SOFT alGetSource3i64SOFT;
static LPALGETSOURCEI64VSOFT alGetSourcei64vSOFT;
/* LoadBuffer loads the named audio file into an OpenAL buffer object, and
* returns the new buffer ID. */
static ALuint LoadSound(const char *filename)
{
ALenum err, format, type, channels;
ALuint rate, buffer;
size_t datalen;
void *data;
FilePtr sound;
/* Open the audio file */
sound = openAudioFile(filename, 1000);
if(!sound)
{
fprintf(stderr, "Could not open audio in %s\n", filename);
closeAudioFile(sound);
return 0;
}
/* Get the sound format, and figure out the OpenAL format */
if(getAudioInfo(sound, &rate, &channels, &type) != 0)
{
fprintf(stderr, "Error getting audio info for %s\n", filename);
closeAudioFile(sound);
return 0;
}
format = GetFormat(channels, type, alIsBufferFormatSupportedSOFT);
if(format == AL_NONE)
{
fprintf(stderr, "Unsupported format (%s, %s) for %s\n",
ChannelsName(channels), TypeName(type), filename);
closeAudioFile(sound);
return 0;
}
/* Decode the whole audio stream to a buffer. */
data = decodeAudioStream(sound, &datalen);
if(!data)
{
fprintf(stderr, "Failed to read audio from %s\n", filename);
closeAudioFile(sound);
return 0;
}
/* Buffer the audio data into a new buffer object, then free the data and
* close the file. */
buffer = 0;
alGenBuffers(1, &buffer);
alBufferSamplesSOFT(buffer, rate, format, BytesToFrames(datalen, channels, type),
channels, type, data);
free(data);
closeAudioFile(sound);
/* Check if an error occured, and clean up if so. */
err = alGetError();
if(err != AL_NO_ERROR)
{
fprintf(stderr, "OpenAL Error: %s\n", alGetString(err));
if(alIsBuffer(buffer))
alDeleteBuffers(1, &buffer);
return 0;
}
return buffer;
}
int main(int argc, char **argv)
{
ALuint source, buffer;
ALdouble offsets[2];
ALenum state;
/* Print out usage if no arguments were specified */
if(argc < 2)
{
fprintf(stderr, "Usage: %s [-device <name>] <filename>\n", argv[0]);
return 1;
}
/* Initialize OpenAL, and check for source_latency support. */
argv++; argc--;
if(InitAL(&argv, &argc) != 0)
return 1;
if(!alIsExtensionPresent("AL_SOFT_source_latency"))
{
fprintf(stderr, "Error: AL_SOFT_source_latency not supported\n");
CloseAL();
return 1;
}
/* Define a macro to help load the function pointers. */
#define LOAD_PROC(x) ((x) = alGetProcAddress(#x))
LOAD_PROC(alSourcedSOFT);
LOAD_PROC(alSource3dSOFT);
LOAD_PROC(alSourcedvSOFT);
LOAD_PROC(alGetSourcedSOFT);
LOAD_PROC(alGetSource3dSOFT);
LOAD_PROC(alGetSourcedvSOFT);
LOAD_PROC(alSourcei64SOFT);
LOAD_PROC(alSource3i64SOFT);
LOAD_PROC(alSourcei64vSOFT);
LOAD_PROC(alGetSourcei64SOFT);
LOAD_PROC(alGetSource3i64SOFT);
LOAD_PROC(alGetSourcei64vSOFT);
if(alIsExtensionPresent("AL_SOFT_buffer_samples"))
{
LOAD_PROC(alBufferSamplesSOFT);
LOAD_PROC(alIsBufferFormatSupportedSOFT);
}
#undef LOAD_PROC
/* Load the sound into a buffer. */
buffer = LoadSound(argv[0]);
if(!buffer)
{
CloseAL();
return 1;
}
/* Create the source to play the sound with. */
source = 0;
alGenSources(1, &source);
alSourcei(source, AL_BUFFER, buffer);
assert(alGetError()==AL_NO_ERROR && "Failed to setup sound source");
/* Play the sound until it finishes. */
alSourcePlay(source);
do {
al_nssleep(10000000);
alGetSourcei(source, AL_SOURCE_STATE, &state);
/* Get the source offset and latency. AL_SEC_OFFSET_LATENCY_SOFT will
* place the offset (in seconds) in offsets[0], and the time until that
* offset will be heard (in seconds) in offsets[1]. */
alGetSourcedvSOFT(source, AL_SEC_OFFSET_LATENCY_SOFT, offsets);
printf("\rOffset: %f - Latency:%3u ms ", offsets[0], (ALuint)(offsets[1]*1000));
fflush(stdout);
} while(alGetError() == AL_NO_ERROR && state == AL_PLAYING);
printf("\n");
/* All done. Delete resources, and close OpenAL. */
alDeleteSources(1, &source);
alDeleteBuffers(1, &buffer);
CloseAL();
return 0;
}
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