diff options
Diffstat (limited to 'examples/common/alhelpers.c')
| -rw-r--r-- | examples/common/alhelpers.c | 273 |
1 files changed, 31 insertions, 242 deletions
diff --git a/examples/common/alhelpers.c b/examples/common/alhelpers.c index 4582321c..fab039e9 100644 --- a/examples/common/alhelpers.c +++ b/examples/common/alhelpers.c @@ -29,6 +29,7 @@ * channel configs and sample types. */ #include <stdio.h> +#include <string.h> #include "AL/al.h" #include "AL/alc.h" @@ -37,15 +38,26 @@ #include "alhelpers.h" -/* InitAL opens the default device and sets up a context using default - * attributes, making the program ready to call OpenAL functions. */ -int InitAL(void) +/* InitAL opens a device and sets up a context using default attributes, making + * the program ready to call OpenAL functions. */ +int InitAL(char ***argv, int *argc) { + const ALCchar *name; ALCdevice *device; ALCcontext *ctx; - /* Open and initialize a device with default settings */ - device = alcOpenDevice(NULL); + /* Open and initialize a device */ + device = NULL; + if(argc && argv && *argc > 1 && strcmp((*argv)[0], "-device") == 0) + { + device = alcOpenDevice((*argv)[1]); + if(!device) + fprintf(stderr, "Failed to open \"%s\", trying default\n", (*argv)[1]); + (*argv) += 2; + (*argc) -= 2; + } + if(!device) + device = alcOpenDevice(NULL); if(!device) { fprintf(stderr, "Could not open a device!\n"); @@ -62,7 +74,13 @@ int InitAL(void) return 1; } - printf("Opened \"%s\"\n", alcGetString(device, ALC_DEVICE_SPECIFIER)); + name = NULL; + if(alcIsExtensionPresent(device, "ALC_ENUMERATE_ALL_EXT")) + name = alcGetString(device, ALC_ALL_DEVICES_SPECIFIER); + if(!name || alcGetError(device) != AL_NO_ERROR) + name = alcGetString(device, ALC_DEVICE_SPECIFIER); + printf("Opened \"%s\"\n", name); + return 0; } @@ -85,243 +103,14 @@ void CloseAL(void) } -/* 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; - - /* If using AL_SOFT_buffer_samples, try looking through its formats */ - if(palIsBufferFormatSupportedSOFT) - { - /* AL_SOFT_buffer_samples is more lenient with matching formats. The - * specified sample type does not need to match the returned format, - * but it is nice to try to get something close. */ - if(type == AL_UNSIGNED_BYTE_SOFT || type == AL_BYTE_SOFT) - { - if(channels == AL_MONO_SOFT) format = AL_MONO8_SOFT; - else if(channels == AL_STEREO_SOFT) format = AL_STEREO8_SOFT; - else if(channels == AL_QUAD_SOFT) format = AL_QUAD8_SOFT; - else if(channels == AL_5POINT1_SOFT) format = AL_5POINT1_8_SOFT; - else if(channels == AL_6POINT1_SOFT) format = AL_6POINT1_8_SOFT; - else if(channels == AL_7POINT1_SOFT) format = AL_7POINT1_8_SOFT; - } - else if(type == AL_UNSIGNED_SHORT_SOFT || type == AL_SHORT_SOFT) - { - if(channels == AL_MONO_SOFT) format = AL_MONO16_SOFT; - else if(channels == AL_STEREO_SOFT) format = AL_STEREO16_SOFT; - else if(channels == AL_QUAD_SOFT) format = AL_QUAD16_SOFT; - else if(channels == AL_5POINT1_SOFT) format = AL_5POINT1_16_SOFT; - else if(channels == AL_6POINT1_SOFT) format = AL_6POINT1_16_SOFT; - else if(channels == AL_7POINT1_SOFT) format = AL_7POINT1_16_SOFT; - } - else if(type == AL_UNSIGNED_BYTE3_SOFT || type == AL_BYTE3_SOFT || - type == AL_UNSIGNED_INT_SOFT || type == AL_INT_SOFT || - type == AL_FLOAT_SOFT || type == AL_DOUBLE_SOFT) - { - if(channels == AL_MONO_SOFT) format = AL_MONO32F_SOFT; - else if(channels == AL_STEREO_SOFT) format = AL_STEREO32F_SOFT; - else if(channels == AL_QUAD_SOFT) format = AL_QUAD32F_SOFT; - else if(channels == AL_5POINT1_SOFT) format = AL_5POINT1_32F_SOFT; - else if(channels == AL_6POINT1_SOFT) format = AL_6POINT1_32F_SOFT; - else if(channels == AL_7POINT1_SOFT) format = AL_7POINT1_32F_SOFT; - } - - if(format != AL_NONE && !palIsBufferFormatSupportedSOFT(format)) - format = AL_NONE; - - /* A matching format was not found or supported. Try 32-bit float. */ - if(format == AL_NONE) - { - if(channels == AL_MONO_SOFT) format = AL_MONO32F_SOFT; - else if(channels == AL_STEREO_SOFT) format = AL_STEREO32F_SOFT; - else if(channels == AL_QUAD_SOFT) format = AL_QUAD32F_SOFT; - else if(channels == AL_5POINT1_SOFT) format = AL_5POINT1_32F_SOFT; - else if(channels == AL_6POINT1_SOFT) format = AL_6POINT1_32F_SOFT; - else if(channels == AL_7POINT1_SOFT) format = AL_7POINT1_32F_SOFT; - - if(format != AL_NONE && !palIsBufferFormatSupportedSOFT(format)) - format = AL_NONE; - } - /* 32-bit float not supported. Try 16-bit int. */ - if(format == AL_NONE) - { - if(channels == AL_MONO_SOFT) format = AL_MONO16_SOFT; - else if(channels == AL_STEREO_SOFT) format = AL_STEREO16_SOFT; - else if(channels == AL_QUAD_SOFT) format = AL_QUAD16_SOFT; - else if(channels == AL_5POINT1_SOFT) format = AL_5POINT1_16_SOFT; - else if(channels == AL_6POINT1_SOFT) format = AL_6POINT1_16_SOFT; - else if(channels == AL_7POINT1_SOFT) format = AL_7POINT1_16_SOFT; - - if(format != AL_NONE && !palIsBufferFormatSupportedSOFT(format)) - format = AL_NONE; - } - /* 16-bit int not supported. Try 8-bit int. */ - if(format == AL_NONE) - { - if(channels == AL_MONO_SOFT) format = AL_MONO8_SOFT; - else if(channels == AL_STEREO_SOFT) format = AL_STEREO8_SOFT; - else if(channels == AL_QUAD_SOFT) format = AL_QUAD8_SOFT; - else if(channels == AL_5POINT1_SOFT) format = AL_5POINT1_8_SOFT; - else if(channels == AL_6POINT1_SOFT) format = AL_6POINT1_8_SOFT; - else if(channels == AL_7POINT1_SOFT) format = AL_7POINT1_8_SOFT; - - if(format != AL_NONE && !palIsBufferFormatSupportedSOFT(format)) - format = AL_NONE; - } - - return format; - } - - /* We use the AL_EXT_MCFORMATS extension to provide output of Quad, 5.1, - * and 7.1 channel configs, AL_EXT_FLOAT32 for 32-bit float samples, and - * AL_EXT_DOUBLE for 64-bit float samples. */ - if(type == AL_UNSIGNED_BYTE_SOFT) - { - if(channels == AL_MONO_SOFT) - format = AL_FORMAT_MONO8; - else if(channels == AL_STEREO_SOFT) - format = AL_FORMAT_STEREO8; - else if(alIsExtensionPresent("AL_EXT_MCFORMATS")) - { - if(channels == AL_QUAD_SOFT) - format = alGetEnumValue("AL_FORMAT_QUAD8"); - else if(channels == AL_5POINT1_SOFT) - format = alGetEnumValue("AL_FORMAT_51CHN8"); - else if(channels == AL_6POINT1_SOFT) - format = alGetEnumValue("AL_FORMAT_61CHN8"); - else if(channels == AL_7POINT1_SOFT) - format = alGetEnumValue("AL_FORMAT_71CHN8"); - } - } - else if(type == AL_SHORT_SOFT) - { - if(channels == AL_MONO_SOFT) - format = AL_FORMAT_MONO16; - else if(channels == AL_STEREO_SOFT) - format = AL_FORMAT_STEREO16; - else if(alIsExtensionPresent("AL_EXT_MCFORMATS")) - { - if(channels == AL_QUAD_SOFT) - format = alGetEnumValue("AL_FORMAT_QUAD16"); - else if(channels == AL_5POINT1_SOFT) - format = alGetEnumValue("AL_FORMAT_51CHN16"); - else if(channels == AL_6POINT1_SOFT) - format = alGetEnumValue("AL_FORMAT_61CHN16"); - else if(channels == AL_7POINT1_SOFT) - format = alGetEnumValue("AL_FORMAT_71CHN16"); - } - } - else if(type == AL_FLOAT_SOFT && alIsExtensionPresent("AL_EXT_FLOAT32")) - { - if(channels == AL_MONO_SOFT) - format = alGetEnumValue("AL_FORMAT_MONO_FLOAT32"); - else if(channels == AL_STEREO_SOFT) - format = alGetEnumValue("AL_FORMAT_STEREO_FLOAT32"); - else if(alIsExtensionPresent("AL_EXT_MCFORMATS")) - { - if(channels == AL_QUAD_SOFT) - format = alGetEnumValue("AL_FORMAT_QUAD32"); - else if(channels == AL_5POINT1_SOFT) - format = alGetEnumValue("AL_FORMAT_51CHN32"); - else if(channels == AL_6POINT1_SOFT) - format = alGetEnumValue("AL_FORMAT_61CHN32"); - else if(channels == AL_7POINT1_SOFT) - format = alGetEnumValue("AL_FORMAT_71CHN32"); - } - } - else if(type == AL_DOUBLE_SOFT && alIsExtensionPresent("AL_EXT_DOUBLE")) - { - if(channels == AL_MONO_SOFT) - format = alGetEnumValue("AL_FORMAT_MONO_DOUBLE"); - else if(channels == AL_STEREO_SOFT) - format = alGetEnumValue("AL_FORMAT_STEREO_DOUBLE"); - } - - /* NOTE: It seems OSX returns -1 from alGetEnumValue for unknown enums, as - * opposed to 0. Correct it. */ - if(format == -1) - format = 0; - - return format; -} - - -void AL_APIENTRY wrap_BufferSamples(ALuint buffer, ALuint samplerate, - ALenum internalformat, ALsizei samples, - ALenum channels, ALenum type, - const ALvoid *data) -{ - alBufferData(buffer, internalformat, data, - FramesToBytes(samples, channels, type), - samplerate); -} - - -const char *ChannelsName(ALenum chans) +const char *FormatName(ALenum format) { - switch(chans) + switch(format) { - 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"; + case AL_FORMAT_MONO8: return "Mono, U8"; + case AL_FORMAT_MONO16: return "Mono, S16"; + case AL_FORMAT_STEREO8: return "Stereo, U8"; + case AL_FORMAT_STEREO16: return "Stereo, S16"; } - return "Unknown Channels"; -} - -const char *TypeName(ALenum type) -{ - 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); + return "Unknown Format"; } |