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

1 files changed, 2 insertions, 1 deletions

diff --git a/apps/codecs/shorten.c b/apps/codecs/shorten.c
index db66991679..a8ab3f30a0 100644
--- a/apps/codecs/shorten.c
+++ b/apps/codecs/shorten.c
@@ -99,6 +99,8 @@ enum codec_status codec_run(void)
     sc.bitindex = sc.gb.index - 8*consumed;
 
 seek_start:
+    ci->set_elapsed(0);
+
     /* The main decoding loop */
     ci->memset(&decoded0, 0, sizeof(int32_t)*MAX_DECODE_SIZE);
     ci->memset(&decoded1, 0, sizeof(int32_t)*MAX_DECODE_SIZE);
@@ -118,7 +120,6 @@ seek_start:
             if (param == 0 &&
                 ci->seek_buffer(sc.header_bits/8 + ci->id3->first_frame_offset)) {
                 sc.bitindex = sc.header_bits - 8*(sc.header_bits/8);
-                ci->set_elapsed(0);
                 ci->seek_complete();
                 goto seek_start;
             }