include: video: add size field to video_format structure

Add size field to the video_format structure which needs to be set by the
driver and exposed to the application.

For uncompressed formats, this is the size of the raw data buffer in
bytes, which could be the whole raw image or a portion of the raw image
in cases the receiver / dma supports it.

For compressed formats, this is the estimated maximum number of bytes
required to hold a complete compressed frame.

Signed-off-by: Hugues Fruchet <[email protected]>
Signed-off-by: Phi Bang Nguyen <[email protected]>

Author: hfruchet-st

include/zephyr/drivers/video.h

@@ -79,6 +79,17 @@ struct video_format {
 	 * the next row (>=width).
 	 */
 	uint32_t pitch;
+	/**
+	 * @brief size of the buffer in bytes, need to be set by the drivers
+	 *
+	 * For uncompressed formats, this is the size of the raw data buffer in bytes,
+	 * which could be the whole raw image or a portion of the raw image in cases
+	 * the receiver / dma supports it.
+	 *
+	 * For compressed formats, this is the maximum number of bytes required to
+	 * hold a complete compressed frame, estimated for the worst case.
+	 */
+	uint32_t size;
 };
 
 /**