X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=modules%2Fdemux%2Fsmf.c;h=baaf5aebb475e9b04ee17546a9c4ffe7401dd70f;hb=72e25cde23ab4299ea6ce3a2f0218a947dd867e4;hp=410789805e09d30968ebe29c261b6494c39da8fc;hpb=57bbabb5e7c4b33141fdfbd811c78120e2401a9f;p=vlc

diff --git a/modules/demux/smf.c b/modules/demux/smf.c
index 410789805e..baaf5aebb4 100644
--- a/modules/demux/smf.c
+++ b/modules/demux/smf.c
@@ -23,13 +23,16 @@
 # include "config.h"
 #endif
 
-#include <vlc/vlc.h>
+#include <vlc_common.h>
+#include <vlc_plugin.h>
 #include <vlc_demux.h>
 #include <vlc_aout.h>
 #include <vlc_codecs.h>
 #include <vlc_charset.h>
 #include <limits.h>
 
+#include <assert.h>
+
 #define TEMPO_MIN  20
 #define TEMPO_MAX 250 /* Beats per minute */
 
@@ -37,7 +40,7 @@ static int  Open  (vlc_object_t *);
 static void Close (vlc_object_t *);
 
 vlc_module_begin ();
-    set_description (_("SMF demuxer"));
+    set_description (N_("SMF demuxer"));
     set_category (CAT_INPUT);
     set_subcategory (SUBCAT_INPUT_DEMUX);
     set_capability ("demux", 20);
@@ -87,6 +90,44 @@ static int Open (vlc_object_t * p_this)
     if (stream_Peek (stream, &peek, 14) < 14)
         return VLC_EGENERIC;
 
+    /* Skip RIFF MIDI header if present */
+    if (!memcmp (peek, "RIFF", 4) && !memcmp (peek + 8, "RMID", 4))
+    {
+        uint32_t riff_len = GetDWLE (peek + 4);
+
+        msg_Dbg (p_this, "detected RIFF MIDI file (%u bytes)",
+                 (unsigned)riff_len);
+        if ((stream_Read (stream, NULL, 12) < 12))
+            return VLC_EGENERIC;
+
+        /* Look for the RIFF data chunk */
+        for (;;)
+        {
+            char chnk_hdr[8];
+            uint32_t chnk_len;
+
+            if ((riff_len < 8)
+             || (stream_Read (stream, chnk_hdr, 8) < 8))
+                return VLC_EGENERIC;
+
+            riff_len -= 8;
+            chnk_len = GetDWLE (chnk_hdr + 4);
+            if (riff_len < chnk_len)
+                return VLC_EGENERIC;
+            riff_len -= chnk_len;
+
+            if (!memcmp (chnk_hdr, "data", 4))
+                break; /* found! */
+
+            if (stream_Read (stream, NULL, chnk_len) < (ssize_t)chnk_len)
+                return VLC_EGENERIC;
+        }
+
+        /* Read real SMF header. Assume RIFF data chunk length is proper. */
+        if (stream_Peek (stream, &peek, 14) < 14)
+            return VLC_EGENERIC;
+    }
+
     if (memcmp (peek, "MThd\x00\x00\x00\x06", 8))
         return VLC_EGENERIC;
     peek += 8;
@@ -295,7 +336,7 @@ int HandleMeta (demux_t *p_demux, mtrk_t *tr)
         case 0x00: /* Sequence Number */
             break;
 
-        case 0x01: /* Test (comment) */
+        case 0x01: /* Text (comment) */
             EnsureUTF8 ((char *)payload);
             msg_Info (p_demux, "Text      : %s", (char *)payload);
             break;
@@ -440,6 +481,7 @@ int HandleMessage (demux_t *p_demux, mtrk_t *tr)
                         if (c == 0xF7)
                             goto skip;
                     }
+                    /* never reached */
                 }
                 case 0xFF: /* SMF Meta Event */
                     if (HandleMeta (p_demux, tr))
@@ -550,7 +592,7 @@ static int Demux (demux_t *p_demux)
     else
         last_tick = cur_tick + 1;
 
-    /* MIDI Tick emulation (ping the decider every 10ms) */
+    /* MIDI Tick emulation (ping the decoder every 10ms) */
     while (cur_tick < last_tick)
     {
         block_t *tick = block_New (p_demux, 1);