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

1 files changed, 40 insertions, 42 deletions

diff --git a/apps/codecs/smaf.c b/apps/codecs/smaf.c
index 3e8a413..9211daa 100644
--- a/apps/codecs/smaf.c
+++ b/apps/codecs/smaf.c
@@ -332,9 +332,20 @@ static uint8_t *read_buffer(size_t *realsize)
     return buffer;
 }
 
-enum codec_status codec_main(void)
+/* this is the codec entry point */
+enum codec_status codec_main(enum codec_entry_call_reason reason)
+{
+    if (reason == CODEC_LOAD) {
+        /* Generic codec initialisation */
+        ci->configure(DSP_SET_SAMPLE_DEPTH, PCM_OUTPUT_DEPTH-1);
+    }
+
+    return CODEC_OK;
+}
+
+/* this is called for each file to process */
+enum codec_status codec_run(void)
 {
-    int status;
     uint32_t decodedsamples;
     size_t n;
     int bufcount;
@@ -342,20 +353,10 @@ enum codec_status codec_main(void)
     uint8_t *smafbuf;
     off_t firstblockposn;     /* position of the first block in file */
     const struct pcm_codec *codec;
-
-    /* Generic codec initialisation */
-    ci->configure(DSP_SET_SAMPLE_DEPTH, PCM_OUTPUT_DEPTH-1);
+    intptr_t param;
   
-next_track:
-    status = CODEC_OK;
-
-    if (codec_init()) {
-        status = CODEC_ERROR;
-        goto exit;
-    }
-
-    if (codec_wait_taginfo() != 0)
-        goto done;
+    if (codec_init())
+        return CODEC_ERROR;
 
     codec_set_replaygain(ci->id3);
 
@@ -365,24 +366,22 @@ next_track:
     decodedsamples = 0;
     codec = 0;
 
+    ci->seek_buffer(0);
     if (!parse_header(&format, &firstblockposn))
     {
-        status = CODEC_ERROR;
-        goto done;
+        return CODEC_ERROR;
     }
 
     codec = get_codec(format.formattag);
     if (codec == 0)
     {
         DEBUGF("CODEC_ERROR: unsupport audio format: 0x%x\n", (int)format.formattag);
-        status = CODEC_ERROR;
-        goto done;
+        return CODEC_ERROR;
     }
 
     if (!codec->set_format(&format))
     {
-        status = CODEC_ERROR;
-        goto done;
+        return CODEC_ERROR;
     }
 
     /* check chunksize */
@@ -392,8 +391,7 @@ next_track:
     if (format.chunksize == 0)
     {
         DEBUGF("CODEC_ERROR: chunksize is 0\n");
-        status = CODEC_ERROR;
-        goto done;
+        return CODEC_ERROR;
     }
 
     ci->configure(DSP_SWITCH_FREQUENCY, ci->id3->frequency);
@@ -404,12 +402,10 @@ next_track:
         ci->configure(DSP_SET_STEREO_MODE, STEREO_MONO);
     } else {
         DEBUGF("CODEC_ERROR: more than 2 channels unsupported\n");
-        status = CODEC_ERROR;
-        goto done;
+        return CODEC_ERROR;
     }
 
     ci->seek_buffer(firstblockposn);
-    ci->seek_complete();
 
     /* make sure we're at the correct offset */
     if (bytesdone > (uint32_t) firstblockposn)
@@ -419,13 +415,13 @@ next_track:
                                                      PCM_SEEK_POS, &read_buffer);
 
         if (newpos->pos > format.numbytes)
-            goto done;
+            return CODEC_OK;
+
         if (ci->seek_buffer(firstblockposn + newpos->pos))
         {
             bytesdone      = newpos->pos;
             decodedsamples = newpos->samples;
         }
-        ci->seek_complete();
     }
     else
     {
@@ -437,23 +433,32 @@ next_track:
     endofstream = 0;
 
     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) {
-            struct pcm_pos *newpos = codec->get_seek_pos(ci->seek_time, PCM_SEEK_TIME,
+        if (action == CODEC_ACTION_SEEK_TIME) {
+            struct pcm_pos *newpos = codec->get_seek_pos(param, PCM_SEEK_TIME,
                                                          &read_buffer);
 
             if (newpos->pos > format.numbytes)
+            {
+                ci->set_elapsed(ci->id3->length);
+                ci->seek_complete();
                 break;
+            }
+
             if (ci->seek_buffer(firstblockposn + newpos->pos))
             {
                 bytesdone      = newpos->pos;
                 decodedsamples = newpos->samples;
             }
+
+            ci->set_elapsed(decodedsamples*1000LL/ci->id3->frequency);
             ci->seek_complete();
         }
+
         smafbuf = (uint8_t *)ci->request_buffer(&n, format.chunksize);
 
         if (n == 0)
@@ -464,11 +469,10 @@ next_track:
             endofstream = 1;
         }
 
-        status = codec->decode(smafbuf, n, samples, &bufcount);
-        if (status == CODEC_ERROR)
+        if (codec->decode(smafbuf, n, samples, &bufcount) == CODEC_ERROR)
         {
             DEBUGF("codec error\n");
-            goto done;
+            return CODEC_ERROR;
         }
 
         ci->pcmbuf_insert(samples, NULL, bufcount);
@@ -482,11 +486,5 @@ next_track:
         ci->set_elapsed(decodedsamples*1000LL/ci->id3->frequency);
     }
 
-done:
-    if (ci->request_next_track())
-        goto next_track;
-
-exit:
-    return status;
+    return CODEC_OK;
 }
-