diff options
| author | Chris Robinson <[email protected]> | 2014-03-04 05:16:45 -0800 |
|---|---|---|
| committer | Chris Robinson <[email protected]> | 2014-03-04 05:53:35 -0800 |
| commit | f3a87d72b266640a706ddd3234aa4313b53cabce (patch) | |
| tree | af906bac99467fc9407f4d94fbddc678ab3f80a1 /OpenAL32/Include | |
| parent | b0a6b6427cfedc194fceee19ddbb7653fca813df (diff) | |
Add an extension to alter the block alignment for buffer unpack/pack ops
This is for unpacking (reading, e.g. alBufferData) and packing (writing, e.g.
alGetBufferSamplesSOFT) operations. The alignments are specified in sample
frames, with 0 meaning the default (65 for IMA4, 1 otherwise). IMA4 alignment
must be a multiple of 8, plus 1 (e.g. alignment = n*8 + 1), otherwise an error
will occur during (un)packing. Chenging the block alignment does not affect
already-loaded sample data, only future unpack/pack operations... so for
example, this is perfectly valid:
// Load mono IMA4 data with a block alignment of 1024 bytes, or 2041 sample
// frames.
alBufferi(buffer, AL_UNPACK_BLOCK_ALIGNMENT_SOFT, 2041);
alBufferData(buffer, AL_FORMAT_MONO_IMA4, data, data_len, srate);
alBufferi(buffer, AL_UNPACK_BLOCK_ALIGNMENT_SOFT, 0);
Diffstat (limited to 'OpenAL32/Include')
| -rw-r--r-- | OpenAL32/Include/alBuffer.h | 3 | ||||
| -rw-r--r-- | OpenAL32/Include/alMain.h | 6 |
2 files changed, 9 insertions, 0 deletions
diff --git a/OpenAL32/Include/alBuffer.h b/OpenAL32/Include/alBuffer.h index 60f406c8..be426df2 100644 --- a/OpenAL32/Include/alBuffer.h +++ b/OpenAL32/Include/alBuffer.h @@ -84,6 +84,9 @@ typedef struct ALbuffer { ALsizei LoopStart; ALsizei LoopEnd; + ALsizei UnpackAlign; + ALsizei PackAlign; + /* Number of times buffer was attached to a source (deletion can only occur when 0) */ RefCount ref; diff --git a/OpenAL32/Include/alMain.h b/OpenAL32/Include/alMain.h index 06fb954c..7de52260 100644 --- a/OpenAL32/Include/alMain.h +++ b/OpenAL32/Include/alMain.h @@ -240,6 +240,12 @@ ALC_API void ALC_APIENTRY alcGetInteger64vSOFT(ALCdevice *device, ALCenum pname, #endif #endif +#ifndef AL_SOFT_block_alignment +#define AL_SOFT_block_alignment 1 +#define AL_UNPACK_BLOCK_ALIGNMENT_SOFT 0x200C +#define AL_PACK_BLOCK_ALIGNMENT_SOFT 0x200D +#endif + #ifdef IN_IDE_PARSER /* KDevelop's parser doesn't recognize the C99-standard restrict keyword, but |