From c537d5958e8b421ac4f9bef6c8b9e7425a6cf167 Mon Sep 17 00:00:00 2001
From: Michael Sevakis <jethead71@rockbox.org>
Date: Wed, 27 Apr 2011 03:08:23 +0000
Subject: Commit FS#12069 - Playback rework - first stages. Gives as thorough
 as possible a treatment of codec management, track change and metadata logic
 as possible while maintaining fairly narrow focus and not rewriting
 everything all at once. Please see the rockbox-dev mail archive on 2011-04-25
 (Playback engine rework) for a more thorough manifest of what was addressed.
 Plugins and codecs become incompatible.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@29785 a1c6a512-1295-4272-9138-f99709370657
---
 apps/codecs/tta.c | 61 +++++++++++++++++++++++++------------------------------
 1 file changed, 28 insertions(+), 33 deletions(-)

(limited to 'apps/codecs/tta.c')

diff --git a/apps/codecs/tta.c b/apps/codecs/tta.c
index 1d0846ea61..c75f2b0a57 100644
--- a/apps/codecs/tta.c
+++ b/apps/codecs/tta.c
@@ -34,36 +34,36 @@ CODEC_HEADER
 static int32_t samples[PCM_BUFFER_LENGTH * 2] IBSS_ATTR;
 
 /* this is the codec entry point */
-enum codec_status codec_main(void)
+enum codec_status codec_main(enum codec_entry_call_reason reason)
+{
+    if (reason == CODEC_LOAD) {
+        /* Generic codec initialisation */
+        ci->configure(DSP_SET_SAMPLE_DEPTH, TTA_OUTPUT_DEPTH - 1);
+    }
+
+    return CODEC_OK;
+}
+
+/* this is called for each file to process */
+enum codec_status codec_run(void)
 {
     tta_info info;
-    int status;
     unsigned int decodedsamples;
     int endofstream;
     int new_pos = 0;
     int sample_count;
-
-    /* Generic codec initialisation */
-    ci->configure(DSP_SET_SAMPLE_DEPTH, TTA_OUTPUT_DEPTH - 1);
+    intptr_t param;
   
-next_track:
-    status = CODEC_OK;
-
     if (codec_init())
     {
         DEBUGF("codec_init() error\n");
-        status = CODEC_ERROR;
-        goto exit;
+        return CODEC_ERROR;
     }
 
-    if (codec_wait_taginfo() != 0)
-        goto done;
+    ci->seek_buffer(0);
 
     if (set_tta_info(&info) < 0 || player_init(&info) < 0)
-    {
-        status = CODEC_ERROR;
-        goto exit;
-    }
+        return CODEC_ERROR;
 
     codec_set_replaygain(ci->id3);
 
@@ -74,8 +74,8 @@ next_track:
         ci->configure(DSP_SET_STEREO_MODE, STEREO_MONO);
     } else {
         DEBUGF("CODEC_ERROR: more than 2 channels\n");
-        status = CODEC_ERROR;
-        goto done;
+        player_stop();
+        return CODEC_ERROR;
     }
 
     /* The main decoder loop */
@@ -88,31 +88,31 @@ next_track:
         new_pos = set_position(ci->id3->offset, TTA_SEEK_POS);
         if (new_pos >= 0)
             decodedsamples = new_pos;
-        ci->seek_complete();
     }
 
     while (!endofstream)
     {
-        ci->yield();
-        if (ci->stop_codec || ci->new_track)
+        enum codec_command_action action = ci->get_command(&param);
+
+        if (action == CODEC_ACTION_HALT)
             break;
 
-        if (ci->seek_time)
+        if (action == CODEC_ACTION_SEEK_TIME)
         {
-            new_pos = set_position(ci->seek_time / SEEK_STEP, TTA_SEEK_TIME);
+            new_pos = set_position(param / SEEK_STEP, TTA_SEEK_TIME);
             if (new_pos >= 0)
             {
                 decodedsamples = new_pos;
-                ci->seek_complete();
             }
+
+            ci->set_elapsed((uint64_t)info.LENGTH * 1000 * decodedsamples / info.DATALENGTH);
+            ci->seek_complete();
         }
 
         sample_count = get_samples(samples);
         if (sample_count < 0)
-        {
-            status = CODEC_ERROR;
             break;
-        }
+ 
         ci->pcmbuf_insert(samples, NULL, sample_count);
         decodedsamples += sample_count;
         if (decodedsamples >= info.DATALENGTH)
@@ -120,11 +120,6 @@ next_track:
         ci->set_elapsed((uint64_t)info.LENGTH * 1000 * decodedsamples / info.DATALENGTH);
     }
 
-done:
     player_stop();
-    if (ci->request_next_track())
-        goto next_track;
-
-exit:
-    return status;
+    return CODEC_OK;
 }
-- 
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