From 6b6463c8b702ee4860a1c2ae63fa8b334e1eb5d5 Mon Sep 17 00:00:00 2001
From: Magnus Holmgren <magnushol@gmail.com>
Date: Sun, 22 Nov 2009 16:37:36 +0000
Subject: Add support for the MP4 file type 'isom'. Based on FS#10790 with an
 additional fix, making the sample file play. Also updated some debug prints.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@23708 a1c6a512-1295-4272-9138-f99709370657
---
 apps/codecs/libm4a/demux.c |  3 ++-
 apps/metadata/mp4.c        | 22 +++++++++++++++-------
 2 files changed, 17 insertions(+), 8 deletions(-)

diff --git a/apps/codecs/libm4a/demux.c b/apps/codecs/libm4a/demux.c
index 61ff16c0d9..00fd3132aa 100644
--- a/apps/codecs/libm4a/demux.c
+++ b/apps/codecs/libm4a/demux.c
@@ -66,7 +66,8 @@ static void read_chunk_ftyp(qtmovie_t *qtmovie, size_t chunk_len)
         (type != MAKEFOURCC('M','4','B',' ')) &&
         (type != MAKEFOURCC('m','p','4','2')) &&
         (type != MAKEFOURCC('3','g','p','6')) &&
-        (type != MAKEFOURCC('q','t',' ',' ')))
+        (type != MAKEFOURCC('q','t',' ',' ')) &&
+        (type != MAKEFOURCC('i','s','o','m')))
     {
         DEBUGF("not M4A file\n");
         return;
diff --git a/apps/metadata/mp4.c b/apps/metadata/mp4.c
index 410bb79b81..44bc68eb5c 100644
--- a/apps/metadata/mp4.c
+++ b/apps/metadata/mp4.c
@@ -51,6 +51,7 @@
 #define MP4_gnre FOURCC('g', 'n', 'r', 'e')
 #define MP4_hdlr FOURCC('h', 'd', 'l', 'r')
 #define MP4_ilst FOURCC('i', 'l', 's', 't')
+#define MP4_isom FOURCC('i', 's', 'o', 'm')
 #define MP4_M4A  FOURCC('M', '4', 'A', ' ')
 #define MP4_M4B  FOURCC('M', '4', 'B', ' ')
 #define MP4_mdat FOURCC('m', 'd', 'a', 't')
@@ -552,9 +553,10 @@ static bool read_mp4_container(int fd, struct mp3entry* id3,
     {
         size_left = read_mp4_atom(fd, &size, &type, size_left);
         
-        /* DEBUGF("Atom: '%c%c%c%c' (0x%08x, %d bytes left)\n", 
-            (type >> 24) & 0xff, (type >> 16) & 0xff, (type >> 8) & 0xff, 
-            type & 0xff, type, size); */
+        /* DEBUGF("Atom: '%c%c%c%c' (0x%08lx, %lu bytes left)\n", 
+            (int) ((type >> 24) & 0xff), (int) ((type >> 16) & 0xff),
+            (int) ((type >> 8) & 0xff), (int) (type & 0xff),
+            type, size); */
         
         switch (type)
         {
@@ -566,7 +568,8 @@ static bool read_mp4_container(int fd, struct mp3entry* id3,
                 size -= 4;
                 
                 if ((id != MP4_M4A) && (id != MP4_M4B) && (id != MP4_mp42) 
-                    && (id != MP4_qt) && (id != MP4_3gp6))
+                    && (id != MP4_qt) && (id != MP4_3gp6)
+                    && (id != MP4_isom))
                 {
                     DEBUGF("Unknown MP4 file type: '%c%c%c%c'\n", 
                         (int)(id >> 24 & 0xff), (int)(id >> 16 & 0xff),
@@ -704,7 +707,11 @@ static bool read_mp4_container(int fd, struct mp3entry* id3,
             break;
         }
         
-        lseek(fd, size, SEEK_CUR);
+        /* Skip final seek. */
+        if (id3->filesize == 0)
+        {
+            lseek(fd, size, SEEK_CUR);
+        }
     }
     while (rc && (size_left > 0) && (errno == 0) && (id3->filesize == 0));
     /* Break on non-zero filesize, since Rockbox currently doesn't support
@@ -745,8 +752,9 @@ bool get_mp4_metadata(int fd, struct mp3entry* id3)
     else
     {
         logf("MP4 metadata error");
-        DEBUGF("MP4 metadata error. errno %d, frequency %ld, filesize %ld\n",
-            errno, id3->frequency, id3->filesize);
+        DEBUGF("MP4 metadata error. errno %d, samples %ld, frequency %ld, "
+            "filesize %ld\n", errno, id3->samples, id3->frequency,
+            id3->filesize);
         return false;
     }
 
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