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Reorder and comment some function in alhelpers.c

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This commit is contained in:
Chris Robinson
2012-10-25 23:53:46 -07:00
parent e2e502970c
commit 2c802cc10a
1 changed files with 100 additions and 93 deletions
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examples/common/alhelpers.c
+100 -93
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@@ -37,72 +37,58 @@
#include "alhelpers.h"
const char *ChannelsName(ALenum chans)
/* InitAL opens the default device and sets up a context using default
* attributes, making the program ready to call OpenAL functions. */
int InitAL(void)
{
switch(chans)
ALCdevice *device;
ALCcontext *ctx;
/* Open and initialize a device with default settings */
device = alcOpenDevice(NULL);
if(!device)
{
case AL_MONO_SOFT: return "Mono";
case AL_STEREO_SOFT: return "Stereo";
case AL_REAR_SOFT: return "Rear";
case AL_QUAD_SOFT: return "Quadraphonic";
case AL_5POINT1_SOFT: return "5.1 Surround";
case AL_6POINT1_SOFT: return "6.1 Surround";
case AL_7POINT1_SOFT: return "7.1 Surround";
fprintf(stderr, "Could not open a device!\n");
return 1;
}
return "Unknown Channels";
ctx = alcCreateContext(device, NULL);
if(ctx == NULL || alcMakeContextCurrent(ctx) == ALC_FALSE)
{
if(ctx != NULL)
alcDestroyContext(ctx);
alcCloseDevice(device);
fprintf(stderr, "Could not set a context!\n");
return 1;
}
return 0;
}
const char *TypeName(ALenum type)
/* CloseAL closes the device belonging to the current context, and destroys the
* context. */
void CloseAL(void)
{
switch(type)
{
case AL_BYTE_SOFT: return "S8";
case AL_UNSIGNED_BYTE_SOFT: return "U8";
case AL_SHORT_SOFT: return "S16";
case AL_UNSIGNED_SHORT_SOFT: return "U16";
case AL_INT_SOFT: return "S32";
case AL_UNSIGNED_INT_SOFT: return "U32";
case AL_FLOAT_SOFT: return "Float32";
case AL_DOUBLE_SOFT: return "Float64";
}
return "Unknown Type";
}
ALsizei FramesToBytes(ALsizei size, ALenum channels, ALenum type)
{
switch(channels)
{
case AL_MONO_SOFT: size *= 1; break;
case AL_STEREO_SOFT: size *= 2; break;
case AL_REAR_SOFT: size *= 2; break;
case AL_QUAD_SOFT: size *= 4; break;
case AL_5POINT1_SOFT: size *= 6; break;
case AL_6POINT1_SOFT: size *= 7; break;
case AL_7POINT1_SOFT: size *= 8; break;
}
switch(type)
{
case AL_BYTE_SOFT: size *= sizeof(ALbyte); break;
case AL_UNSIGNED_BYTE_SOFT: size *= sizeof(ALubyte); break;
case AL_SHORT_SOFT: size *= sizeof(ALshort); break;
case AL_UNSIGNED_SHORT_SOFT: size *= sizeof(ALushort); break;
case AL_INT_SOFT: size *= sizeof(ALint); break;
case AL_UNSIGNED_INT_SOFT: size *= sizeof(ALuint); break;
case AL_FLOAT_SOFT: size *= sizeof(ALfloat); break;
case AL_DOUBLE_SOFT: size *= sizeof(ALdouble); break;
}
return size;
}
ALsizei BytesToFrames(ALsizei size, ALenum channels, ALenum type)
{
return size / FramesToBytes(1, channels, type);
ALCdevice *device;
ALCcontext *ctx;
ctx = alcGetCurrentContext();
if(ctx == NULL)
return;
device = alcGetContextsDevice(ctx);
alcMakeContextCurrent(NULL);
alcDestroyContext(ctx);
alcCloseDevice(device);
}
/* GetFormat retrieves a compatible buffer format given the channel config and
* sample type. If an alIsBufferFormatSupportedSOFT-compatible function is
* provided, it will be called to find the closest-matching format from
* AL_SOFT_buffer_samples. Returns AL_NONE (0) if no supported format can be
* found. */
ALenum GetFormat(ALenum channels, ALenum type, LPALISBUFFERFORMATSUPPORTEDSOFT palIsBufferFormatSupportedSOFT)
{
ALenum format = AL_NONE;
@@ -274,46 +260,67 @@ void AL_APIENTRY wrap_BufferSamples(ALuint buffer, ALuint samplerate,
}
int InitAL(void)
const char *ChannelsName(ALenum chans)
{
ALCdevice *device;
ALCcontext *ctx;
/* Open and initialize a device with default settings */
device = alcOpenDevice(NULL);
if(!device)
switch(chans)
{
fprintf(stderr, "Could not open a device!\n");
return 1;
case AL_MONO_SOFT: return "Mono";
case AL_STEREO_SOFT: return "Stereo";
case AL_REAR_SOFT: return "Rear";
case AL_QUAD_SOFT: return "Quadraphonic";
case AL_5POINT1_SOFT: return "5.1 Surround";
case AL_6POINT1_SOFT: return "6.1 Surround";
case AL_7POINT1_SOFT: return "7.1 Surround";
}
ctx = alcCreateContext(device, NULL);
if(ctx == NULL || alcMakeContextCurrent(ctx) == ALC_FALSE)
{
if(ctx != NULL)
alcDestroyContext(ctx);
alcCloseDevice(device);
fprintf(stderr, "Could not set a context!\n");
return 1;
}
return 0;
return "Unknown Channels";
}
void CloseAL(void)
const char *TypeName(ALenum type)
{
ALCdevice *device;
ALCcontext *ctx;
/* Close the device belonging to the current context, and destroy the
* context. */
ctx = alcGetCurrentContext();
if(ctx == NULL)
return;
device = alcGetContextsDevice(ctx);
alcMakeContextCurrent(NULL);
alcDestroyContext(ctx);
alcCloseDevice(device);
switch(type)
{
case AL_BYTE_SOFT: return "S8";
case AL_UNSIGNED_BYTE_SOFT: return "U8";
case AL_SHORT_SOFT: return "S16";
case AL_UNSIGNED_SHORT_SOFT: return "U16";
case AL_INT_SOFT: return "S32";
case AL_UNSIGNED_INT_SOFT: return "U32";
case AL_FLOAT_SOFT: return "Float32";
case AL_DOUBLE_SOFT: return "Float64";
}
return "Unknown Type";
}
ALsizei FramesToBytes(ALsizei size, ALenum channels, ALenum type)
{
switch(channels)
{
case AL_MONO_SOFT: size *= 1; break;
case AL_STEREO_SOFT: size *= 2; break;
case AL_REAR_SOFT: size *= 2; break;
case AL_QUAD_SOFT: size *= 4; break;
case AL_5POINT1_SOFT: size *= 6; break;
case AL_6POINT1_SOFT: size *= 7; break;
case AL_7POINT1_SOFT: size *= 8; break;
}
switch(type)
{
case AL_BYTE_SOFT: size *= sizeof(ALbyte); break;
case AL_UNSIGNED_BYTE_SOFT: size *= sizeof(ALubyte); break;
case AL_SHORT_SOFT: size *= sizeof(ALshort); break;
case AL_UNSIGNED_SHORT_SOFT: size *= sizeof(ALushort); break;
case AL_INT_SOFT: size *= sizeof(ALint); break;
case AL_UNSIGNED_INT_SOFT: size *= sizeof(ALuint); break;
case AL_FLOAT_SOFT: size *= sizeof(ALfloat); break;
case AL_DOUBLE_SOFT: size *= sizeof(ALdouble); break;
}
return size;
}
ALsizei BytesToFrames(ALsizei size, ALenum channels, ALenum type)
{
return size / FramesToBytes(1, channels, type);
}