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<blockquote data-quote="grubi" data-source="post: 177102" data-attributes="member: 52476"><p>Hi hwahrmann,</p><p></p><p>I think a feature freeze is a good thing to get 0.2.3 to the level of reliability it needs for a stable release. Esp. in the </p><p>recent past we saw that new features were breaking existing code.</p><p></p><p>The amount of changes necessary also prevent me from giving it a try at the moment (the effect on exisiting code is more complex as it seems in the first moment).</p><p></p><p>From what I have seen so far gapless should be possible with the current architecture as it is possible to crossfade two songs at the moment without a gap. I have taken a deeper look at the Play method however I still did not find where and when it is triggered exactly. I would assume this happens by a callback of the BASS engine when the end of the currently running track is reached (nearly reached?). What is necessary for gapless is to use the BASS_Mixer interface which I saw is already used at least when upmixing or ASIO is involved. Important is to use the BASS_MIXER_NORAMPIN flag on the BASS_Mixer_StreamAddChannel call which was introduced exactly for the gapless issue. Following is a code snipped which is from the BASS devs for achieving gapless playback. I have not checked it, however I will do so from within a test app and see if it leads to really gapless playback.</p><p></p><p>Regards,</p><p>grubi.</p><p></p><p>mixer=BASS_Mixer_StreamCreate(44100, 2, BASS_MIXER_END); // create mixer</p><p>BASS_ChannelSetSync(mixer, BASS_SYNC_END|BASS_SYNC_MIXTIME, 0, EndSync, 0); // set sync for end</p><p></p><p>source=BASS_StreamCreateFile(...,BASS_STREAM_DECODE|BASS_SAMPLE_FLOAT); // open 1st source</p><p>BASS_Mixer_StreamAddChannel(mixer, source, BASS_STREAM_AUTOFREE); // plug it in (and auto-free it when it ends)</p><p></p><p>BASS_ChannelPlay(mixer, FALSE); // start playing</p><p></p><p>...</p><p></p><p>void CALLBACK EndSync(HSYNC handle, DWORD channel, DWORD data, DWORD user)</p><p>{</p><p> if (!more_sources) return;</p><p> source=BASS_StreamCreateFile(...,BASS_STREAM_DECODE|BASS_SAMPLE_FLOAT); // open next source</p><p> BASS_Mixer_StreamAddChannel(mixer, source, BASS_STREAM_AUTOFREE|BASS_MIXER_NORAMPIN); // plug it in</p><p> BASS_ChannelSetPosition(mixer, 0); // reset the mixer</p><p>}</p></blockquote><p></p>
[QUOTE="grubi, post: 177102, member: 52476"] Hi hwahrmann, I think a feature freeze is a good thing to get 0.2.3 to the level of reliability it needs for a stable release. Esp. in the recent past we saw that new features were breaking existing code. The amount of changes necessary also prevent me from giving it a try at the moment (the effect on exisiting code is more complex as it seems in the first moment). From what I have seen so far gapless should be possible with the current architecture as it is possible to crossfade two songs at the moment without a gap. I have taken a deeper look at the Play method however I still did not find where and when it is triggered exactly. I would assume this happens by a callback of the BASS engine when the end of the currently running track is reached (nearly reached?). What is necessary for gapless is to use the BASS_Mixer interface which I saw is already used at least when upmixing or ASIO is involved. Important is to use the BASS_MIXER_NORAMPIN flag on the BASS_Mixer_StreamAddChannel call which was introduced exactly for the gapless issue. Following is a code snipped which is from the BASS devs for achieving gapless playback. I have not checked it, however I will do so from within a test app and see if it leads to really gapless playback. Regards, grubi. mixer=BASS_Mixer_StreamCreate(44100, 2, BASS_MIXER_END); // create mixer BASS_ChannelSetSync(mixer, BASS_SYNC_END|BASS_SYNC_MIXTIME, 0, EndSync, 0); // set sync for end source=BASS_StreamCreateFile(...,BASS_STREAM_DECODE|BASS_SAMPLE_FLOAT); // open 1st source BASS_Mixer_StreamAddChannel(mixer, source, BASS_STREAM_AUTOFREE); // plug it in (and auto-free it when it ends) BASS_ChannelPlay(mixer, FALSE); // start playing ... void CALLBACK EndSync(HSYNC handle, DWORD channel, DWORD data, DWORD user) { if (!more_sources) return; source=BASS_StreamCreateFile(...,BASS_STREAM_DECODE|BASS_SAMPLE_FLOAT); // open next source BASS_Mixer_StreamAddChannel(mixer, source, BASS_STREAM_AUTOFREE|BASS_MIXER_NORAMPIN); // plug it in BASS_ChannelSetPosition(mixer, 0); // reset the mixer } [/QUOTE]
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