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author | Michael Sevakis <jethead71@rockbox.org> | 2011-08-28 07:45:35 +0000 |
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committer | Michael Sevakis <jethead71@rockbox.org> | 2011-08-28 07:45:35 +0000 |
commit | 7ad2cad173ffa094bb285112582afee1c9aea4e5 (patch) | |
tree | ce23e816cfdffb1767ebe44f4f960c304d8a5fb9 /apps/codecs/mpc.c | |
parent | 463b3ed8b2630d1b9d656dd2a52bbcbd429b4c08 (diff) | |
download | rockbox-7ad2cad173ffa094bb285112582afee1c9aea4e5.tar.gz rockbox-7ad2cad173ffa094bb285112582afee1c9aea4e5.zip |
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/mpc.c')
-rw-r--r-- | apps/codecs/mpc.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/apps/codecs/mpc.c b/apps/codecs/mpc.c index 7388799ee8..a405c72f79 100644 --- a/apps/codecs/mpc.c +++ b/apps/codecs/mpc.c | |||
@@ -123,6 +123,8 @@ enum codec_status codec_run(void) | |||
123 | codec_set_replaygain(ci->id3); | 123 | codec_set_replaygain(ci->id3); |
124 | 124 | ||
125 | /* Resume to saved sample offset. */ | 125 | /* Resume to saved sample offset. */ |
126 | elapsed_time = 0; | ||
127 | |||
126 | if (samplesdone > 0) | 128 | if (samplesdone > 0) |
127 | { | 129 | { |
128 | if (mpc_demux_seek_sample(demux, samplesdone) == MPC_STATUS_OK) | 130 | if (mpc_demux_seek_sample(demux, samplesdone) == MPC_STATUS_OK) |
@@ -136,6 +138,8 @@ enum codec_status codec_run(void) | |||
136 | } | 138 | } |
137 | } | 139 | } |
138 | 140 | ||
141 | ci->set_elapsed(elapsed_time); | ||
142 | |||
139 | /* This is the decoding loop. */ | 143 | /* This is the decoding loop. */ |
140 | do | 144 | do |
141 | { | 145 | { |