Embedded album art support in MP3/ID3v2 tags.

- Support is limited to non-desync jpeg in id3v2 tags. Other formats (hopefully) follow in the future.
- Embedded album art takes precedence over files in album art files.
- No additional buffers are used, the jpeg is read directly from the audio file.

Flyspray: FS#11216
Author: Yoshihisa Uchida and I

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@29259 a1c6a512-1295-4272-9138-f99709370657

1 files changed, 23 insertions, 0 deletions

diff --git a/apps/recorder/jpeg_load.h b/apps/recorder/jpeg_load.h
index 73b6c51bf3..6ff96dabad 100644
--- a/apps/recorder/jpeg_load.h
+++ b/apps/recorder/jpeg_load.h
@@ -44,4 +44,27 @@ int read_jpeg_fd(int fd,
                  int format,
                  const struct custom_format *cformat);
 
+/**
+ * read embedded jpeg files as above. Needs an offset and length into
+ * the file
+ **/
+int clip_jpeg_file(const char* filename,
+                   int offset,
+                   unsigned long jpeg_size,
+                   struct bitmap *bm,
+                   int maxsize,
+                   int format,
+                   const struct custom_format *cformat);
+
+/**
+ * read embedded jpeg files as above. Needs an open file descripter, and
+ * assumes the caller has lseek()'d to the start of the jpeg blob
+ **/
+int clip_jpeg_fd(int fd,
+                 unsigned long jpeg_size,
+                 struct bitmap *bm,
+                 int maxsize,
+                 int format,
+                 const struct custom_format *cformat);
+
 #endif /* _JPEG_JPEG_DECODER_H */