diff options
Diffstat (limited to 'examples/common/alhelpers.c')
| -rw-r--r-- | examples/common/alhelpers.c | 169 |
1 files changed, 88 insertions, 81 deletions
diff --git a/examples/common/alhelpers.c b/examples/common/alhelpers.c index dbfe2383..84d6dad3 100644 --- a/examples/common/alhelpers.c +++ b/examples/common/alhelpers.c @@ -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"; -} -const char *TypeName(ALenum type) -{ - switch(type) + ctx = alcCreateContext(device, NULL); + if(ctx == NULL || alcMakeContextCurrent(ctx) == ALC_FALSE) { - 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"; + if(ctx != NULL) + alcDestroyContext(ctx); + alcCloseDevice(device); + fprintf(stderr, "Could not set a context!\n"); + return 1; } - return "Unknown Type"; -} + return 0; +} -ALsizei FramesToBytes(ALsizei size, ALenum channels, ALenum type) +/* CloseAL closes the device belonging to the current context, and destroys the + * context. */ +void CloseAL(void) { - 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; - } + ALCdevice *device; + ALCcontext *ctx; - 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; - } + ctx = alcGetCurrentContext(); + if(ctx == NULL) + return; - return size; -} + device = alcGetContextsDevice(ctx); -ALsizei BytesToFrames(ALsizei size, ALenum channels, ALenum type) -{ - return size / FramesToBytes(1, channels, type); + 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"; } + return "Unknown Channels"; +} - ctx = alcCreateContext(device, NULL); - if(ctx == NULL || alcMakeContextCurrent(ctx) == ALC_FALSE) +const char *TypeName(ALenum type) +{ + switch(type) { - if(ctx != NULL) - alcDestroyContext(ctx); - alcCloseDevice(device); - fprintf(stderr, "Could not set a context!\n"); - return 1; + 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 0; + return "Unknown Type"; } -void CloseAL(void) + +ALsizei FramesToBytes(ALsizei size, ALenum channels, ALenum type) { - ALCdevice *device; - ALCcontext *ctx; + 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; + } - /* Close the device belonging to the current context, and destroy the - * context. */ - ctx = alcGetCurrentContext(); - if(ctx == NULL) - return; + 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; + } - device = alcGetContextsDevice(ctx); + return size; +} - alcMakeContextCurrent(NULL); - alcDestroyContext(ctx); - alcCloseDevice(device); +ALsizei BytesToFrames(ALsizei size, ALenum channels, ALenum type) +{ + return size / FramesToBytes(1, channels, type); } |