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screencast: pipewire add import_wl_shm_buffer function

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This function lets us create a wl_buffer from any shared memory
filedescriptor.
This commit is contained in:
columbarius 2021-05-27 20:45:19 +02:00
parent 9bf7367320
commit 566fb7c1a0
2 changed files with 19 additions and 0 deletions
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2
include/screencast_common.h
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@ -123,6 +123,8 @@ struct xdpw_wlr_output {
void randname(char *buf);
int anonymous_shm_open(void);
struct wl_buffer *import_wl_shm_buffer(struct xdpw_screencast_instance *cast, int fd,
enum wl_shm_format fmt, int width, int height, int stride);
enum spa_video_format xdpw_format_pw_from_wl_shm(enum wl_shm_format format);
enum spa_video_format xdpw_format_pw_strip_alpha(enum spa_video_format format);

17
src/screencast/screencast_common.c
View file

@ -36,6 +36,23 @@ int anonymous_shm_open(void) {
return -1;
}
struct wl_buffer *import_wl_shm_buffer(struct xdpw_screencast_instance *cast, int fd,
enum wl_shm_format fmt, int width, int height, int stride) {
struct xdpw_screencast_context *ctx = cast->ctx;
int size = stride * height;
if (fd < 0) {
return NULL;
}
struct wl_shm_pool *pool = wl_shm_create_pool(ctx->shm, fd, size);
struct wl_buffer *buffer =
wl_shm_pool_create_buffer(pool, 0, width, height, stride, fmt);
wl_shm_pool_destroy(pool);
return buffer;
}
enum spa_video_format xdpw_format_pw_from_wl_shm(enum wl_shm_format format) {
switch (format) {
case WL_SHM_FORMAT_ARGB8888: