Codecs: mp3: Move strip tags to codec

Another fix for FS#13626 (replacement for 2bd88936f7)

Change-Id: Ife5f65539457559fd908d0048d4df94649b0b894

apps/buffering.c

@@ -1408,6 +1408,16 @@ ssize_t bufread(int handle_id, size_t size, void *dest)
     return size;
 }
 
+off_t bufstripsize(int handle_id, off_t size)
+{
+    struct memory_handle *h = find_handle(handle_id);
+    if (!h || h->filesize < size)
+        return ERR_INVALID_VALUE;
+
+    h->filesize = size;
+    return size;
+}
+
 /* Update the "data" pointer to make the handle's data available to the caller.
    Return the length of the available linear data or < 0 for failure (handle
    not found).

apps/buffering.h

@@ -81,6 +81,7 @@ int bufseek(int handle_id, size_t newpos);
 int bufadvance(int handle_id, off_t offset);
 off_t bufftell(int handle_id);
 ssize_t bufread(int handle_id, size_t size, void *dest);
+off_t bufstripsize(int handle_id, off_t size);
 ssize_t bufgetdata(int handle_id, size_t size, void **data);
 
 /***************************************************************************

apps/codec_thread.c

@@ -440,6 +440,11 @@ static bool codec_loop_track_callback(void)
     return global_settings.repeat_mode == REPEAT_ONE;
 }
 
+void codec_strip_filesize_callback(off_t size)
+{
+    if (bufstripsize(ci.audio_hid, size) >= 0)
+        ci.filesize = size;
+}
 
 /** --- CODEC THREAD --- **/
 
@@ -647,6 +652,7 @@ void INIT_ATTR codec_thread_init(void)
     ci.configure        = codec_configure_callback;
     ci.get_command      = codec_get_command_callback;
     ci.loop_track       = codec_loop_track_callback;
+    ci.strip_filesize = codec_strip_filesize_callback;
 
     /* Init threading */
     queue_init(&codec_queue, false);

apps/codecs.c

@@ -89,6 +89,7 @@ struct codec_api ci = {
     NULL, /* configure */
     NULL, /* get_command */
     NULL, /* loop_track */
+    NULL, /* strip_filesize */
 
     /* kernel/ system */
 #if defined(ARM_NEED_DIV0)

lib/rbcodec/codecs/codecs.h

@@ -152,6 +152,7 @@ struct codec_api {
     long (*get_command)(intptr_t *param);
     /* Determine whether the track should be looped, if applicable. */
     bool (*loop_track)(void);
+    void (*strip_filesize)(off_t value);
 
     /* kernel/ system */
 #if defined(ARM_NEED_DIV0)

lib/rbcodec/codecs/mpa.c

@@ -448,6 +448,11 @@ enum codec_status codec_run(void)
     ci->configure(DSP_SET_FREQUENCY, ci->id3->frequency);
     current_frequency = ci->id3->frequency;
     codec_set_replaygain(ci->id3);
+    if (!ci->id3->is_asf_stream)
+    {
+        // End of file might contain ID3v1 or APE tags. Strip them from decoding
+        ci->strip_filesize(ci->id3->first_frame_offset + ci->id3->filesize);
+    }
 
      if (ci->id3->offset) {