FrameTileThreadData::lowest_pixel_mem: Make into Vec

Also remove `FrameTileThreadData` because it only had a single field and was only used in one place. `lowest_pixel_mem` is now a field of `Rav1dFrameData`.

src/decode.rs

@@ -4325,18 +4325,11 @@ pub(crate) unsafe fn rav1d_decode_frame_init(
         }
 
         let lowest_pixel_mem_sz = frame_hdr.tiling.cols * f.sbh;
-        if lowest_pixel_mem_sz != f.tile_thread.lowest_pixel_mem_sz {
-            free(f.tile_thread.lowest_pixel_mem as *mut c_void);
-            f.tile_thread.lowest_pixel_mem =
-                malloc(lowest_pixel_mem_sz as usize * ::core::mem::size_of::<[[c_int; 2]; 7]>())
-                    as *mut [[c_int; 2]; 7];
-            if f.tile_thread.lowest_pixel_mem.is_null() {
-                f.tile_thread.lowest_pixel_mem_sz = 0;
-                return Err(ENOMEM);
-            }
-            f.tile_thread.lowest_pixel_mem_sz = lowest_pixel_mem_sz;
-        }
-        let mut lowest_pixel_ptr = f.tile_thread.lowest_pixel_mem;
+        // TODO: Fallible allocation
+        f.lowest_pixel_mem
+            .resize(lowest_pixel_mem_sz as usize, Default::default());
+
+        let mut lowest_pixel_ptr = f.lowest_pixel_mem.as_mut_ptr();
         for tile_row in 0..frame_hdr.tiling.rows {
             let tile_row_base = tile_row * frame_hdr.tiling.cols;
             let tile_row_sb_h = frame_hdr.tiling.row_start_sb[(tile_row + 1) as usize] as c_int

src/internal.rs

@@ -517,13 +517,6 @@ pub(crate) struct Rav1dFrameContext_task_thread {
     pub pending_tasks: Mutex<Rav1dFrameContext_task_thread_pending_tasks>,
 }
 
-// threading (refer to tc[] for per-thread things)
-#[repr(C)]
-pub struct FrameTileThreadData {
-    pub lowest_pixel_mem: *mut [[c_int; 2]; 7],
-    pub lowest_pixel_mem_sz: c_int,
-}
-
 pub(crate) struct Rav1dFrameContext_frame_thread_progress {
     pub entropy: AtomicI32,
     pub deblock: AtomicI32, // in sby units
@@ -592,7 +585,7 @@ pub(crate) struct Rav1dFrameData {
     pub frame_thread_progress: Rav1dFrameContext_frame_thread_progress,
     pub lf: Rav1dFrameContext_lf,
     pub task_thread: Rav1dFrameContext_task_thread,
-    pub tile_thread: FrameTileThreadData,
+    pub lowest_pixel_mem: Vec<[[c_int; 2]; 7]>,
 }
 
 impl Rav1dFrameData {

src/lib.rs

@@ -902,10 +902,7 @@ impl Drop for Rav1dContext {
             while !(self.fc).is_null() && n_1 < self.n_fc {
                 let f: &mut Rav1dFrameData = &mut *(self.fc).offset(n_1 as isize);
                 if self.n_fc > 1 as c_uint {
-                    freep(
-                        &mut f.tile_thread.lowest_pixel_mem as *mut *mut [[c_int; 2]; 7]
-                            as *mut c_void,
-                    );
+                    let _ = mem::take(&mut f.lowest_pixel_mem); // TODO: remove when context is owned
                 }
                 if self.tc.len() > 1 {
                     let _ = mem::take(&mut f.task_thread.pending_tasks); // TODO: remove when context is owned