From d06f9512e22093cab3b6c956cfdfa83adc7d0c32 Mon Sep 17 00:00:00 2001
From: Buschel <Buschel@a1c6a512-1295-4272-9138-f99709370657>
Date: Sun, 14 Mar 2010 16:05:12 +0000
Subject: [PATCH] Implement resume for alac codec.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@25169 a1c6a512-1295-4272-9138-f99709370657
---
 apps/codecs/alac.c | 21 ++++++++++++++++-----
 apps/playback.c    |  1 +
 2 files changed, 17 insertions(+), 5 deletions(-)

diff --git a/apps/codecs/alac.c b/apps/codecs/alac.c
index fdc6748a9..1de127db2 100644
--- a/apps/codecs/alac.c
+++ b/apps/codecs/alac.c
@@ -63,6 +63,10 @@ enum codec_status codec_main(void)
 
   stream_create(&input_stream,ci);
 
+  /* Read from ci->id3->offset before calling qtmovie_read. */
+  samplesdone = (uint32_t)(((uint64_t)(ci->id3->offset) * ci->id3->frequency) /  
+                (ci->id3->bitrate*128));
+  
   /* if qtmovie_read returns successfully, the stream is up to
    * the movie data, which can be used directly by the decoder */
   if (!qtmovie_read(&input_stream, &demux_res)) {
@@ -74,9 +78,19 @@ enum codec_status codec_main(void)
   /* initialise the sound converter */
   create_alac(demux_res.sound_sample_size, demux_res.num_channels,&alac);
   alac_set_info(&alac, demux_res.codecdata);
-
+  
+  /* Set i for first frame, seek to desired sample position for resuming. */
   i=0;
-  samplesdone=0;
+  if (samplesdone > 0) {
+    if (alac_seek(&demux_res, &input_stream, samplesdone,
+                  &samplesdone, (int*) &i)) {
+        elapsedtime = (samplesdone * 10) / (ci->id3->frequency / 100);
+        ci->set_elapsed(elapsedtime);
+    } else {
+        samplesdone = 0;
+    }
+  }
+
   /* The main decoding loop */
   while (i < demux_res.num_sample_byte_sizes) {
     ci->yield();
@@ -127,9 +141,6 @@ enum codec_status codec_main(void)
     elapsedtime=(samplesdone*10)/(ci->id3->frequency/100);
     ci->set_elapsed(elapsedtime);
 
-    /* Keep track of current position - for resuming */
-    ci->set_offset(elapsedtime);
-
     i++;
   }
   retval = CODEC_OK;
diff --git a/apps/playback.c b/apps/playback.c
index 536fd614c..81cd31ec2 100644
--- a/apps/playback.c
+++ b/apps/playback.c
@@ -1370,6 +1370,7 @@ static void audio_finish_load_track(void)
     case AFMT_PCM_WAV:
     case AFMT_A52:
     case AFMT_MP4_AAC:
+    case AFMT_MP4_ALAC:
     case AFMT_MPC:
     case AFMT_APE:
     case AFMT_WMA:
-- 
2.11.4.GIT