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NS/main/source/includes/fmodapi375linux/documentation/HTML/FSOUND_Stream_Open.html
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<A HREF="FSOUND.html#Functions"><H5>[API function]</A></H5>
<H2><A NAME="FSOUND_Stream_Open">FSOUND_Stream_Open</A></H2>
Opens an audio file/url/cd ready for streaming. <BR>
This opens the file in preparation for playback in real-time, without needing to decode the whole file into memory first.<BR>
<P>
<B>FSOUND_STREAM * F_API </B><B> </B><B>FSOUND_Stream_Open</B><B>(</B><BR>
<B>const char *</B><I>name_or_data</I><B>,</B><BR>
<B>unsigned int </B><B> </B><I>mode</I><B>,</B><BR>
<B>int </B><B> </B><I>offset</I><B>,</B><BR>
<B>int </B><B> </B><I>length</I><BR>
<B>);</B><BR>
<H3>Parameters</H3>
<TABLE>
<TR VALIGN=top><TD><I>name_or_data</I></TD>
<TD>Name of the file to open, or pointer to data if FSOUND_LOADMEMORY is used.<BR>
</TD><TR VALIGN=top><TD><I>mode</I></TD>
<TD>Simple description of how to play the file. For all formats except raw PCM,<BR>
FSOUND_LOOP*, FSOUND_HW3D, FSOUND_HW2D, FSOUND_2D, FSOUND_LOADMEMORY, FSOUND_LOADRAW, FSOUND_MPEGACCURATE, FSOUND_NONBLOCKING flags are the only ones supported.<BR>
</TD><TR VALIGN=top><TD><I>offset</I></TD>
<TD>Optional. 0 by default. If &gt; 0, this value is used to specify an offset in a file, so fmod will seek before opening. length must also be specified if this value is used.<BR>
</TD><TR VALIGN=top><TD><I>length</I></TD>
<TD>Optional. 0 by default. If &gt; 0, this value is used to specify the length of a memory block when using FSOUND_LOADMEMORY, or it is the length of a file or file segment if the offset parameter is used. On PlayStation 2 this must be 16 byte aligned for memory loading.<BR>
</TD></TABLE>
<H3>Return Value</H3>
On success, a pointer to an opened stream is returned.<BR>
On failure, NULL is returned.<BR>
<H3>Remarks</H3>
WAV support supports windows codec compressed WAV files.<BR>
--------------<BR>
FSOUND_MPEGACCURATE is to be used cautiously. To open a file with this mode turned on, it has to scan the whole MP3 first. This can take several seconds if the file is big, or the harddisk/cpu is slow.<BR>
A way to speed up this process would be to load the compressed mp3 into memory first, and use the FSOUND_LOADMEMORY flag with this function.<BR>
--------------<BR>
NOTE : Internet stream limitations<BR>
- URLs must start with "http://".<BR>
- The only supported formats for HTTP streams are MP3 (must have .mp3 extension) and OggVorbis (must have .ogg extension).<BR>
--------------<BR>
FSB streaming is not supported if the format from FSBank is 'Retain original format'. On PC platforms, only PCM and ADPCM FSB files are allowed.<BR>
--------------<BR>
Note, on PlayStation 2 you cannot use FSOUND_LOADMEMORY, you may use FSOUND_LOADMEMORYIOP though.<BR>
--------------<BR>
When opening with the FSOUND_NONBLOCKING flag, this function always succeeds at the point of being called. <BR>
It will always return a valid channel handle, even though the file might fail to open. To determine any error in non blocking mode use FSOUND_Stream_GetOpenState.<BR>
--------------<BR>
NOTE: CDDA Streaming (Win32 only!)<BR>
To open a CD for CDDA streaming, specify the drive letter of a CD drive e.g. FSOUND_Stream_Open("d:", 0, 0, 0); FSOUND_Stream_Open will create a stream with multiple substreams, one for each CD track. Use FSOUND_Stream_SetSubStream to select which CD track to play.<BR>
A number of options can be passed to FSOUND_Stream_Open along with the drive letter. They are :<BR>
*? e.g. FSOUND_Stream_Open("d:*?", 0, 0, 0); This option will cause a tag field called "CD_DEVICE_INFO" to be attached to the stream. This tag field contains information on the specified CD device.<BR>
*! e.g. FSOUND_Stream_Open("d:*!", 0, 0, 0); This option will cause the stream to be opened in "quick open" mode. When a stream is opened in this mode, calls to FSOUND_Stream_SetSubStream will return immediately making it quick to select each substream in turn and get the length of each CD track. Note that a stream in quick open mode cannot be played! Use quick open mode to get track lengths and then re-open the stream without quick open mode to actually play it.<BR>
*j e.g. FSOUND_Stream_Open("d:*j", 0, 0, 0); This option turns jitter correction OFF.<BR>
*a e.g. FSOUND_Stream_Open("d:*a", 0, 0, 0); This option will force FMOD to use ASPI to access the specified CD drive as opposed to NTSCSI. It should generally only be used as a last resort if FMOD is unable to access drives that are known to be working with other programs.<BR>
Options can be combined like so: FSOUND_Stream_Open("d:*?!j", 0, 0, 0);<BR>
If a nonblocking CDDA stream fails to open, a tag field called "CD_ERROR" will be attached to the stream. This tag field contains a textual description of why the stream failed to open.<BR>
NOTE: FMOD will always try to use native NTSCSI support to communicate with CD devices before trying to use ASPI, unless the "*a" option is specified, in which case FMOD will only try to use ASPI. Unlike in pre-3.73 versions, FMOD can now access all CD drives when using ASPI.<BR>
___________________<BR>
Supported on the following platforms : Win32, WinCE, Linux, Macintosh, XBox, PlayStation 2, GameCube<BR>
<H3>See Also</H3>
<A HREF="FSOUND_MODES.html">FSOUND_MODES</A>
,
<A HREF="FSOUND_Stream_Close.html">FSOUND_Stream_Close</A>
,
<A HREF="FSOUND_Stream_GetLength.html">FSOUND_Stream_GetLength</A>
,
<A HREF="FSOUND_Stream_GetLengthMs.html">FSOUND_Stream_GetLengthMs</A>
,
<A HREF="FSOUND_Stream_GetOpenState.html">FSOUND_Stream_GetOpenState</A>
,
<A HREF="FSOUND_Stream_Net_GetBufferProperties.html">FSOUND_Stream_Net_GetBufferProperties</A>
,
<A HREF="FSOUND_Stream_Net_GetInfo.html">FSOUND_Stream_Net_GetInfo</A>
,
<A HREF="FSOUND_Stream_Net_GetLastServerStatus.html">FSOUND_Stream_Net_GetLastServerStatus</A>
,
<A HREF="FSOUND_Stream_Net_GetStatus.html">FSOUND_Stream_Net_GetStatus</A>
,
<A HREF="FSOUND_Stream_Net_SetBufferProperties.html">FSOUND_Stream_Net_SetBufferProperties</A>
,
<A HREF="FSOUND_Stream_Net_SetMetadataCallback.html">FSOUND_Stream_Net_SetMetadataCallback</A>
,
<A HREF="FSOUND_Stream_Net_SetProxy.html">FSOUND_Stream_Net_SetProxy</A>
,
<A HREF="FSOUND_Stream_Net_SetTimeout.html">FSOUND_Stream_Net_SetTimeout</A>
,
<A HREF="FSOUND_Stream_Open.html">FSOUND_Stream_Open</A>
,
<A HREF="FSOUND_Stream_OpenFromHandle.html">FSOUND_Stream_OpenFromHandle</A>
,
<A HREF="FSOUND_Stream_Play.html">FSOUND_Stream_Play</A>
,
<A HREF="FSOUND_Stream_PlayEx.html">FSOUND_Stream_PlayEx</A>
,
<A HREF="FSOUND_Stream_SetBufferSize.html">FSOUND_Stream_SetBufferSize</A>
,
<A HREF="FSOUND_Stream_SetSubStream.html">FSOUND_Stream_SetSubStream</A>
,
<A HREF="FSOUND_Stream_Stop.html">FSOUND_Stream_Stop</A>
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