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Diffstat (limited to 'video/out/wayland/buffer.h')
| -rw-r--r-- | video/out/wayland/buffer.h | 102 |
1 files changed, 102 insertions, 0 deletions
diff --git a/video/out/wayland/buffer.h b/video/out/wayland/buffer.h new file mode 100644 index 0000000000..04e94b9d7f --- /dev/null +++ b/video/out/wayland/buffer.h @@ -0,0 +1,102 @@ +/* + * 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 */ |