1 files changed, 91 insertions, 0 deletions
diff --git a/code/linux_handmade.h b/code/linux_handmade.h
new file mode 100644
index 0000000..f85320e
--- /dev/null
+++ b/code/linux_handmade.h
@@ -0,0 +1,91 @@
+/* date = April 15th 2025 4:50 pm */
+
+#ifndef LINUX_HANDMADE_H
+#define LINUX_HANDMADE_H
+
+struct linux_game_code
+{
+    game_update_and_render *UpdateAndRender;
+    game_get_sound_samples *GetSoundSamples;
+    
+    void *LibraryHandle;
+    struct timespec LibraryLastWriteTime;
+};
+
+enum linux_gamepad_axes_enum
+{
+    LSTICKX,
+    LSTICKY,
+    RSTICKX,
+    RSTICKY,
+    LSHOULDER,
+    RSHOULDER,
+    DPADX,
+    DPADY,
+    AXES_COUNT
+};
+
+struct linux_gamepad_axis
+{
+    s32 Minimum;
+    s32 Maximum;
+    s32 Fuzz;
+    s32 Flat;
+};
+
+struct linux_gamepad
+{
+    int File;
+    char FilePath[PATH_MAX];
+    
+    char Name[256];
+    int SupportsRumble;
+    linux_gamepad_axis Axes[AXES_COUNT];
+};
+
+struct linux_replay_buffer
+{
+    int FD;
+    char FileName[PATH_MAX];
+    void *MemoryBlock;
+};
+struct linux_state
+{
+    int InputPlayingIndex;
+    int InputRecordingIndex;
+    int InputPlayingFile;
+    int InputRecordingFile;
+    
+    linux_replay_buffer ReplayBuffers[4];
+    
+    char ExecutablePath[PATH_MAX];
+    
+    size_t TotalSize;
+    void *GameMemoryBlock;
+};
+
+// ---------------------------------------------------------------------------------------
+// IMPORTANT(luca): Copy Pasted from alsa-lib;  This is a hack to access the hw_ptr and to
+// understand what alsa-lib functions are doing internally better through the debugger.
+typedef struct { unsigned char pad[sizeof(time_t) - sizeof(int)]; } __time_pad;
+typedef struct
+{
+	snd_pcm_state_t state;		     /* stream state */
+	__time_pad pad1;		           /* align to timespec */
+	struct timespec trigger_tstamp;	/* time when stream was started/stopped/paused */
+	struct timespec tstamp;		    /* reference timestamp */
+	snd_pcm_uframes_t appl_ptr;	    /* appl ptr */
+	snd_pcm_uframes_t hw_ptr;	      /* hw ptr */
+	snd_pcm_sframes_t delay;	       /* current delay in frames */
+	snd_pcm_uframes_t avail;	       /* number of frames available */
+	snd_pcm_uframes_t avail_max;	   /* max frames available on hw since last status */
+	snd_pcm_uframes_t overrange;	   /* count of ADC (capture) overrange detections from last status */
+	snd_pcm_state_t suspended_state;   /* suspended stream state */
+	__u32 audio_tstamp_data;	       /* needed for 64-bit alignment, used for configs/report to/from userspace */
+	struct timespec audio_tstamp;	  /* sample counter, wall clock, PHC or on-demand sync'ed */
+	struct timespec driver_tstamp;     /* useful in case reference system tstamp is reported with delay */
+	__u32 audio_tstamp_accuracy;	   /* in ns units, only valid if indicated in audio_tstamp_data */
+	unsigned char reserved[52-2*sizeof(struct timespec)]; /* must be filled with zero */
+} sound_status;
+
+#endif //LINUX_HANDMADE_H