mirror of
https://github.com/cookiengineer/audacity
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227 lines
5.0 KiB
HTML
227 lines
5.0 KiB
HTML
<!doctype html public "-//w3c//dtd html 4.0 transitional//en">
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<html>
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
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<meta name="GENERATOR" content="Mozilla/4.77 [en]C-gatewaynet (Win98; U) [Netscape]">
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<meta name="Author" content="Phil Burk">
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<meta name="Description" content="PortAudio is a cross platform, open-source, audio I/O library.It provides a very simple API for recording and/or playing sound using a simple callback function.">
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<meta name="KeyWords" content="audio, library, portable, open-source, DirectSound,sound, music, JSyn, synthesis,">
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<title>PortAudio Implementations for DirectSound</title>
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</head>
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<body>
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<center><table COLS=1 WIDTH="100%" BGCOLOR="#FADA7A" >
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<tr>
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<td>
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<center>
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<h1>
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PortAudio - Release Notes</h1></center>
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</td>
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</tr>
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</table></center>
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<p>Link to <a href="http://www.portaudio.com">PortAudio Home Page</a>
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<h2>
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<b>V17 - 10/15/01</b></h2>
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<blockquote><b>Unix OSS</b>
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<ul>
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<li>
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Set num channels back to two after device query for ALSA. This fixed a
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bug in V16 that sometimes caused a failure when querying for the sample
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rates. Thanks Stweart Greenhill.</li>
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</ul>
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</blockquote>
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<blockquote>
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<h4>
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<b>Macintosh Sound Manager</b></h4>
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<ul>
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<li>
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Use NewSndCallBackUPP() for CARBON compatibility.</li>
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</ul>
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</blockquote>
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<h2>
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<b>V16 - 9/27/01</b></h2>
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<blockquote><b>Added Alpha implementations for ASIO, SGI, and BeOS!</b>
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<br>
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<li>
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CPULoad is now calculated based on the time spent to generate a known number
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of frames. This is more accurate than a simple percentage of real-time.
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Implemented in pa_unix_oss, pa_win_wmme and pa_win_ds.</li>
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<li>
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Fix dither and shift for recording PaUInt8 format data.</li>
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<li>
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Added "patest_maxsines.c" which tests <tt>Pa_GetCPULoad().</tt></li>
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</blockquote>
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<blockquote>
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<h4>
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Windows WMME</h4>
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<ul>
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<li>
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sDevicePtrs now allocated using <tt>GlobalAlloc()</tt>. This prevents a
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crash in Pa_Terminate() on Win2000. Thanks Mike Berry for finding this.
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Thanks Mike Berry.</li>
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<li>
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Pass process instead of thread to <tt>SetPriorityClass</tt>(). This fixes
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a bug that caused the priority to not be increased. Thanks to Alberto di
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Bene for spotting this.</li>
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</ul>
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<h4>
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Windows DirectSound</h4>
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<ul>
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<li>
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Casts for compiling with __MWERKS__ CodeWarrior.</li>
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</ul>
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<h4>
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UNIX OSS</h4>
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<ul>
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<li>
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Derived from Linux OSS implementation.</li>
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<li>
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Numerous patches from Heiko Purnhagen, Stephen Brandon, etc.</li>
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<li>
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Improved query mechanism which often bailed out unnecessarily.</li>
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<li>
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Removed sNumDevices and potential related bugs,</li>
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<li>
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Use <tt>getenv("PA_MIN_LATENCY_MSEC")</tt> in code to set desired latency.
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User can set by entering:</li>
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<br> <tt>export PA_MIN_LATENCY_MSEC=40</tt></ul>
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<h4>
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Macintosh Sound Manager</h4>
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<ul>
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<li>
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Pass unused event to WaitNextEvent instead of NULL to prevent Mac OSX crash.
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Thanks Dominic Mazzoni.</li>
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<br> </ul>
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</blockquote>
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<h2>
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<b>V15 - 5/29/01</b></h2>
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<blockquote>
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<ul>
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<li>
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<b>New Linux OSS Beta</b></li>
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</ul>
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<h4>
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Windows WMME</h4>
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<ul>
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<li>
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sDevicePtrs now allocated based on sizeof(pointer). Was allocating
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too much space.</li>
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<li>
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Check for excessive numbers of channels. Some drivers reported bogus
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numbers.</li>
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<li>
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Apply Mike Berry's changes for CodeWarrior on PC including condition including
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of memory.h, and explicit typecasting on memory allocation.</li>
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</ul>
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<h4>
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Macintosh Sound Manager</h4>
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<ul>
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<li>
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ScanInputDevices was setting sDefaultOutputDeviceID instead of sDefaultInputDeviceID.</li>
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<li>
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Device Scan was crashing for anything other than siBadSoundInDevice, but
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some Macs may return other errors! Caused failure to init on some G4s under
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OS9.</li>
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<li>
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Fix TIMEOUT in record mode.</li>
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<li>
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Change CARBON_COMPATIBLE to TARGET_API_MAC_CARBON</li>
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</ul>
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</blockquote>
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<h2>
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<b>V14 - 2/6/01</b></h2>
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<blockquote>
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<ul>
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<li>
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Added implementation for Windows MultiMedia Extensions (WMME) by Ross and
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Phil</li>
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<li>
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Changed Pa_StopStream() so that it waits for the buffers to drain.</li>
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<li>
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Added Pa_AbortStream() that stops immediately without waiting.</li>
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<li>
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Added new test: patest_stop.c to test above two mods.</li>
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<li>
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Fixed Pa_StreamTime() so that it returns current play position instead
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of the write position. Added "patest_sync.c" to demo audio/video sync.</li>
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<li>
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Improved stability of Macintosh implementation. Added timeouts to prevent
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hangs.</li>
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<li>
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Added Pa_GetSampleSize( PaSampleFormat format );</li>
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<li>
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Changes some "int"s to "long"s so that PA works properly on Macintosh which
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often compiles using 16 bit ints.</li>
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<li>
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Added Implementation Guide</li>
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</ul>
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</blockquote>
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<h2>
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<b>V12 - 1/9/01</b></h2>
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<blockquote>
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<ul>
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<li>
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Mac now scans for and queries all devices. But it does not yet support
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selecting any other than the default device.</li>
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<li>
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Blocking I/O calls renamed to separate them from the PortAudio API.</li>
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<li>
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Cleaned up indentation problems with tabs versus spaces.</li>
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<li>
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Now attempts to correct bogus sample rate info returned from DirectSound
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device queries.</li>
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</ul>
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</blockquote>
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</body>
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</html>
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