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xcbgrab: Do not assume the non shm image data is always available

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Signed-off-by: Luca Barbato <lu_zero@gentoo.org>
This commit is contained in:
Luca Barbato 2015-03-14 12:30:10 +01:00
parent a09c499a2e
commit 82a10225f8
1 changed files with 14 additions and 2 deletions
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16
libavdevice/xcbgrab.c
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@ -145,13 +145,25 @@ static int xcbgrab_frame(AVFormatContext *s, AVPacket *pkt)
xcb_get_image_cookie_t iq; xcb_get_image_cookie_t iq;
xcb_get_image_reply_t *img; xcb_get_image_reply_t *img;
xcb_drawable_t drawable = c->screen->root; xcb_drawable_t drawable = c->screen->root;
xcb_generic_error_t *e = NULL;
uint8_t *data; uint8_t *data;
int length, ret; int length, ret;
iq = xcb_get_image(c->conn, XCB_IMAGE_FORMAT_Z_PIXMAP, drawable, iq = xcb_get_image(c->conn, XCB_IMAGE_FORMAT_Z_PIXMAP, drawable,
c->x, c->y, c->width, c->height, ~0); c->x, c->y, c->width, c->height, ~0);
img = xcb_get_image_reply(c->conn, iq, NULL); img = xcb_get_image_reply(c->conn, iq, &e);
if (e) {
av_log(s, AV_LOG_ERROR,
"Cannot get the image data "
"event_error: response_type:%u error_code:%u "
"sequence:%u resource_id:%u minor_code:%u major_code:%u.\n",
e->response_type, e->error_code,
e->sequence, e->resource_id, e->minor_code, e->major_code);
return AVERROR(EACCES);
}
if (!img) if (!img)
return AVERROR(EAGAIN); return AVERROR(EAGAIN);
@ -405,7 +417,7 @@ static int xcbgrab_read_packet(AVFormatContext *s, AVPacket *pkt)
ret = xcbgrab_frame(s, pkt); ret = xcbgrab_frame(s, pkt);
#if CONFIG_LIBXCB_XFIXES #if CONFIG_LIBXCB_XFIXES
if (c->draw_mouse && p->same_screen) if (ret >= 0 && c->draw_mouse && p->same_screen)
xcbgrab_draw_mouse(s, pkt, p, geo); xcbgrab_draw_mouse(s, pkt, p, geo);
#endif #endif