Blargg's video game music emulation library, which allows audio applications to easily add playback support for the music of many classic video game consoles.
When I launch vlc file.spc --start-time 1, where file.spc is stereo, VLC uses gstreamer and tries to seek by 1000 ms. But msec_to_samples instead returns 2000 ms (converted into samples). Consequently VLC starts playing 2 seconds in.
Original comment by Michael Pyne (Bitbucket: mpyne, GitHub: mpyne).
Without having looked at the code, perhaps an issue in seek_samples? I can do some digging to figure out whether it was intentional for code like msec_to_samples to inflate by the number of audio channels or not.
Wohlstand
commented
5 years ago
Original report by jimbo1qaz (Bitbucket: jimbo1qaz, ).
https://github.com/dv1/gst-nonstream-audio/blob/master/ext/gme/gstgmedec.c#L314-L320
static gboolean gst_gme_dec_seek(GstNonstreamAudioDecoder dec, GstClockTime new_position) { err = gme_seek(gme_dec->emu, *new_position / GST_MSECOND);
BLARGG_EXPORT gme_err_t gme_seek ( Music_Emu* me, int msec ) { return me->seek( msec ); }
blargg_err_t Music_Emu::seek( long msec ) { return seek_samples( msec_to_samples( msec ) ); }
blargg_long Music_Emu::msec_to_samples( blargg_long msec ) const { blargg_long sec = msec / 1000; msec -= sec 1000; return (sec sample_rate() + msec sample_rate() / 1000) out_channels(); }
When I launch
vlc file.spc --start-time 1, where file.spc is stereo, VLC uses gstreamer and tries to seek by 1000 ms. But msec_to_samples instead returns 2000 ms (converted into samples). Consequently VLC starts playing 2 seconds in.