Add metadata header to media files

The following properties are supported:

- Sound: "loop". Must be either 0 or 1
- Images: "transparent". Must be either 0 or 1

These headers are only used for non-PS1 builds, since .TIM and .VAG
files do already implement such information.

3 files changed, 31 insertions, 3 deletions

diff --git a/src/sfx/CMakeLists.txt b/src/sfx/CMakeLists.txt
index 3453d2e..6b774fd 100644
--- a/src/sfx/CMakeLists.txt
+++ b/src/sfx/CMakeLists.txt
@@ -10,7 +10,7 @@ elseif(SDL1_2_BUILD)
         "sdl-1.2/src/sound.c")
     set(inc ${inc} "sdl-1.2/inc")
     set(deps ${deps} SDL_mixer)
-    set(privdeps ${privdeps} SDL)
+    set(privdeps ${privdeps} SDL header)
 endif()
 
 add_library(sfx ${src})
diff --git a/src/sfx/sdl-1.2/inc/sfx/port.h b/src/sfx/sdl-1.2/inc/sfx/port.h
index d8418f7..2279229 100644
--- a/src/sfx/sdl-1.2/inc/sfx/port.h
+++ b/src/sfx/sdl-1.2/inc/sfx/port.h
@@ -2,10 +2,21 @@
 #define SFX_SDL1_2_H
 
 #include <SDL/SDL_mixer.h>
+#include <stdbool.h>
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
 
 struct sound
 {
     Mix_Chunk *chunk;
+    bool loop;
 };
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif /* SFX_SDL1_2_H */
diff --git a/src/sfx/sdl-1.2/src/sound.c b/src/sfx/sdl-1.2/src/sound.c
index e843923..e3e9a8b 100644
--- a/src/sfx/sdl-1.2/src/sound.c
+++ b/src/sfx/sdl-1.2/src/sound.c
@@ -1,5 +1,6 @@
 #include <sfx.h>
 #include <sfx/port.h>
+#include <header.h>
 #include <SDL/SDL.h>
 #include <SDL/SDL_mixer.h>
 #include <stdio.h>
@@ -12,13 +13,13 @@ void sfx_free(struct sound *const s)
 
 int sfx_play(const struct sound *const s)
 {
-    if (Mix_PlayChannel(-1, s->chunk, 0) < 0)
+    if (Mix_PlayChannel(-1, s->chunk, s->loop ? -1 : 0) < 0)
         return -1;
 
     return 0;
 }
 
-int sfx_sound_from_fp(struct sound *const s, FILE *const f)
+static int load_data(struct sound *const s, FILE *const f)
 {
     int ret = -1;
     SDL_RWops *const ops = SDL_RWFromFP(f, 0);
@@ -41,6 +42,22 @@ end:
     return ret;
 }
 
+static int load_header(struct sound *const s, FILE *const f)
+{
+    if (header_load_bool(f, "loop", &s->loop))
+        return -1;
+
+    return 0;
+}
+
+int sfx_sound_from_fp(struct sound *const s, FILE *const f)
+{
+    if (load_header(s, f) || load_data(s, f))
+        return -1;
+
+    return 0;
+}
+
 void sfx_deinit(void)
 {
     Mix_CloseAudio();