mad-dev May 2009

mad-dev@lists.mars.org

2 participants
2 discussions

ReplayGain in RVA2 frames
by Joris van Rantwijk 24 May '09

24 May '09

Hello, I noticed that Madplay supports ReplayGain, which is nice because ReplayGain is a very useful idea. However, Madplay currently does not read ReplayGain information from ID3v2 RVA2 frames. (Madplay does read RVA2 frames, but doesn't look at the identification string which distinguishes between track-gain and album-gain.) This is unfortunate because it seems that, out of at least five distinct methods for storing ReplayGain information, RVA2 is now best supported among audio players. I would like to make the following changes to the ReplayGain code in madplay: * Support ReplayGain from RVA2 frames in addition to RGAD frames. This will improve compatibility with other audio players, making ReplayGain much more usable. * Remove the +6 dB pre-amplification thing. The original ReplayGain standard specified normalize to 83 dB and amplify +6 dB. But this was later revised into simply normalize to 89 dB, which is how all current implementations are doing it. The +6 dB could be left in place for LAME tags older than 3.95.1. I am willing to write and test a patch that implements these changes. Would you accept that patch? Greetings, Joris van Rantwijk.

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How to get the accurate song time?
by Carlos Henrique 06 May '09

06 May '09

Hi to all, I neet to get the time of the song when it is playing. I am using the code below: static enum mad_flow header(void *data, struct mad_header const *header) { mad_timer_add(&musicTimer, header->duration); return MAD_FLOW_CONTINUE; } long mp3_song_time(void) { return mad_timer_count(musicTimer, MAD_UNITS_MILLISECONDS); } The code works, but it is not fast enough. I am getting the time with " mp3_song_time" faster than the header is called. (obs: I am using two processors, one to decode the song and the other to run the code that uses the song time). Is there another way to get the right (more accurate) time? Thanks in advance, -- Carlos Henrique Gomes Correia Game Programmer Interama Games Skype: carloshgcorreia Tel: +55 27 3345 8525 Web: www.interama.net

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mad-dev May 2009