mp_image: expose some image allocation code as helpers, refactor

Refactor the image allocation code, and expose part of it as helper
code. This aims towards allowing callers to easily allocate mp_image
references from custom-allocated linear buffers. This is exposing only
as much as what should be actually required.

1 files changed, 6 insertions, 0 deletions

diff --git a/video/mp_image.h b/video/mp_image.h
index 56ce2257f4..e949b9b81f 100644
--- a/video/mp_image.h
+++ b/video/mp_image.h
@@ -104,6 +104,12 @@ typedef struct mp_image {
 
 int mp_chroma_div_up(int size, int shift);
 
+int mp_image_get_alloc_size(int imgfmt, int w, int h, int stride_align);
+struct mp_image *mp_image_from_buffer(int imgfmt, int w, int h, int stride_align,
+                                      uint8_t *buffer, int buffer_size,
+                                      void *free_opaque,
+                                      void (*free)(void *opaque, uint8_t *data));
+
 struct mp_image *mp_image_alloc(int fmt, int w, int h);
 void mp_image_copy(struct mp_image *dmpi, struct mp_image *mpi);
 void mp_image_copy_gpu(struct mp_image *dst, struct mp_image *src);