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/*
* This file is part of mpv video player.
* Copyright © 2014 Alexander Preisinger <alexander.preisinger@gmail.com>
*
* mpv is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* mpv is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with mpv. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef MPLAYER_WAYLAND_BUFFER_H
#define MPLAYER_WAYLAND_BUFFER_H
#include <libavutil/common.h>
#include "video/sws_utils.h"
#include "video/img_format.h"
#include "video/out/wayland_common.h"
#define SHM_BUFFER_STRIDE(width, bytes) \
FFALIGN((width) * (bytes), SWS_MIN_BYTE_ALIGN)
typedef struct format {
enum wl_shm_format wl_format;
enum mp_imgfmt mp_format;
} format_t;
int8_t format_get_bytes(const format_t *fmt);
typedef enum shm_buffer_flags {
SHM_BUFFER_BUSY = 1 << 0, // in use by the compositor
SHM_BUFFER_DIRTY = 1 << 1, // buffer contains new content
SHM_BUFFER_ONESHOT = 1 << 2, // free after release
SHM_BUFFER_RESIZE_LATER = 1 << 3, // free after release
} shm_buffer_flags_t;
#define SHM_BUFFER_IS_BUSY(b) (!!((b)->flags & SHM_BUFFER_BUSY))
#define SHM_BUFFER_IS_DIRTY(b) (!!((b)->flags & SHM_BUFFER_DIRTY))
#define SHM_BUFFER_IS_ONESHOT(b) (!!((b)->flags & SHM_BUFFER_ONESHOT))
#define SHM_BUFFER_PENDING_RESIZE(b) (!!((b)->flags & SHM_BUFFER_RESIZE_LATER))
#define SHM_BUFFER_SET_BUSY(b) (b)->flags |= SHM_BUFFER_BUSY
#define SHM_BUFFER_SET_DIRTY(b) (b)->flags |= SHM_BUFFER_DIRTY
#define SHM_BUFFER_SET_ONESHOT(b) (b)->flags |= SHM_BUFFER_ONESHOT
#define SHM_BUFFER_SET_PNDNG_RSZ(b) (b)->flags |= SHM_BUFFER_RESIZE_LATER
#define SHM_BUFFER_CLEAR_BUSY(b) (b)->flags &= ~SHM_BUFFER_BUSY
#define SHM_BUFFER_CLEAR_DIRTY(b) (b)->flags &= ~SHM_BUFFER_DIRTY
#define SHM_BUFFER_CLEAR_ONESHOT(b) (b)->flags &= ~SHM_BUFFER_ONESHOT
#define SHM_BUFFER_CLEAR_PNDNG_RSZ(b) (b)->flags &= ~SHM_BUFFER_RESIZE_LATER
typedef struct buffer {
struct wl_buffer *buffer;
int flags;
uint32_t height;
uint32_t stride;
uint32_t bytes; // bytes per pixel
// width = stride / bytes per pixel
// size = stride * height
struct wl_shm_pool *shm_pool; // for growing buffers;
int fd;
void *data;
uint32_t pool_size; // size of pool and data XXX
// pool_size can be far bigger than the buffer size
format_t format;
uint32_t pending_height;
uint32_t pending_width;
} shm_buffer_t;
shm_buffer_t* shm_buffer_create(uint32_t width,
uint32_t height,
format_t fmt,
struct wl_shm *shm,
const struct wl_buffer_listener *listener);
// shm pool is only able to grow and won't shrink
// returns 0 on success or buffer flags indicating the buffer status which
// prevent it from resizing
int shm_buffer_resize(shm_buffer_t *buffer, uint32_t width, uint32_t height);
// if shm_buffer_resize returns SHM_BUFFER_BUSY this function can be called
// after the buffer is released to resize it afterwards
// returns 0 if no pending resize flag was set and -1 on errors
int shm_buffer_pending_resize(shm_buffer_t *buffer);
// buffer is freed, don't use the buffer after calling this function on it
void shm_buffer_destroy(shm_buffer_t *buffer);
#endif /* MPLAYER_WAYLAND_BUFFER_H */
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