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authorMichael Sevakis <jethead71@rockbox.org>2011-08-28 07:45:35 +0000
committerMichael Sevakis <jethead71@rockbox.org>2011-08-28 07:45:35 +0000
commit7ad2cad173ffa094bb285112582afee1c9aea4e5 (patch)
treece23e816cfdffb1767ebe44f4f960c304d8a5fb9 /apps/codecs/adx.c
parent463b3ed8b2630d1b9d656dd2a52bbcbd429b4c08 (diff)
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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
Diffstat (limited to 'apps/codecs/adx.c')
-rw-r--r--apps/codecs/adx.c7
1 files changed, 6 insertions, 1 deletions
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();
}