Creates a sample stream from an Opus file on the internet, optionally receiving the downloaded data in a callback.
HSTREAM BASS_OPUS_StreamCreateURL( char *url, DWORD offset, DWORD flags, DOWNLOADPROC *proc, void *user );
|url||URL of the file to stream. Should begin with "http://" or "https://" or "ftp://". The URL can be followed by custom HTTP request headers to be sent to the server; the URL and each header should be terminated with a carriage return and line feed ("\r\n").|
|offset||File position to start streaming from. This is ignored by some servers, specifically when the length is unknown/undefined.|
|flags||A combination of these flags.
|proc||Callback function to receive the file as it is downloaded... NULL = no callback.|
|user||User instance data to pass to the callback function.|
|BASS_ERROR_INIT||BASS_Init has not been successfully called.|
|BASS_ERROR_NOTAVAIL||The BASS_STREAM_AUTOFREE flag cannot be combined with the BASS_STREAM_DECODE flag.|
|BASS_ERROR_NONET||No internet connection could be opened.|
|BASS_ERROR_ILLPARAM||url is not a valid URL.|
|BASS_ERROR_PROTOCOL||The protocol in url is not supported.|
|BASS_ERROR_SSL||SSL/HTTPS support is not available. See BASS_CONFIG_LIBSSL.|
|BASS_ERROR_TIMEOUT||The server did not respond to the request within the timeout period, as set with the BASS_CONFIG_NET_TIMEOUT config option.|
|BASS_ERROR_FILEOPEN||The file could not be opened.|
|BASS_ERROR_FILEFORM||The file's format is not recognised/supported.|
|BASS_ERROR_FORMAT||The sample format is not supported.|
|BASS_ERROR_SPEAKER||The specified SPEAKER flags are invalid.|
|BASS_ERROR_MEM||There is insufficent memory.|
|BASS_ERROR_NO3D||Could not initialize 3D support.|
|BASS_ERROR_UNKNOWN||Some other mystery problem!|
The Opus file format is Ogg-based, so the standard BASS_TAG_OGG and BASS_TAG_VENDOR tag types apply to Opus too, via BASS_ChannelGetTags. The BASS_SYNC_OGG_CHANGE sync is also supported, via BASS_ChannelSetSync.
When playing the stream, BASS will stall the playback if there is insufficient data to continue playing. Playback will automatically be resumed when sufficient data has been downloaded. BASS_ChannelIsActive can be used to check if the playback is stalled, and the progress of the file download can be checked with BASS_StreamGetFilePosition.
When streaming in blocks (BASS_STREAM_BLOCK flag), be careful not to stop/pause the stream for too long, otherwise the connection may timeout due to there being no activity and the stream will end prematurely.
When using an offset, the file length returned by BASS_StreamGetFilePosition can be used to check that it was successful by comparing it with the original file length. Another way to check is to inspect the HTTP headers retrieved with BASS_ChannelGetTags.
BASS_ChannelGetInfo, BASS_ChannelGetLength, BASS_ChannelGetTags, BASS_ChannelPlay, BASS_ChannelSetAttribute, BASS_ChannelSetDSP, BASS_ChannelSetFX, BASS_ChannelSetLink, BASS_StreamFree, DOWNLOADPROC callback, BASS_CONFIG_NET_AGENT, BASS_CONFIG_NET_BUFFER, BASS_CONFIG_NET_PREBUF, BASS_CONFIG_NET_PROXY, BASS_CONFIG_NET_TIMEOUT