From 7ad2cad173ffa094bb285112582afee1c9aea4e5 Mon Sep 17 00:00:00 2001 From: Michael Sevakis Date: Sun, 28 Aug 2011 07:45:35 +0000 Subject: Commit work started in FS#12153 to put timing/position information in PCM buffer chunks. * Samples and position indication is closely associated with audio data instead of compensating by a latency constant. Alleviates problems with using the elapsed as a track indicator where it could be off by several steps. * Timing is accurate throughout track even if resampling for pitch shift, whereas before it updated during transition latency at the normal 1:1 rate. * Simpler PCM buffer with a constant chunk size, no linked lists. In converting crossfade, a minor change was made to not change the WPS until the fade-in of the incoming track, whereas before it would change upon the start of the fade-out of the outgoing track possibly having the WPS change with far too much lead time. Codec changes are to set elapsed times *before* writing next PCM frame because time and position data last set are saved in the next committed PCM chunk. git-svn-id: svn://svn.rockbox.org/rockbox/trunk@30366 a1c6a512-1295-4272-9138-f99709370657 --- apps/codecs/adx.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) (limited to 'apps/codecs/adx.c') diff --git a/apps/codecs/adx.c b/apps/codecs/adx.c index e75e7dca1e..8144d5f468 100644 --- a/apps/codecs/adx.c +++ b/apps/codecs/adx.c @@ -209,7 +209,7 @@ enum codec_status codec_run(void) /* get in position */ ci->seek_buffer(bufoff); - + ci->set_elapsed(0); /* setup pcm buffer format */ ci->configure(DSP_SWITCH_FREQUENCY, ci->id3->frequency); @@ -276,6 +276,11 @@ enum codec_status codec_run(void) loop_count++; } ci->seek_buffer(bufoff); + + ci->set_elapsed( + ((end_adr-start_adr)*loop_count + bufoff-chanstart)* + 1000LL/avgbytespersec); + ci->seek_complete(); } -- cgit