xvideo.c
资源名称:vlc-1.0.5.zip [点击查看]
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上传日期:2020-07-06
资源大小:29949k
文件大小:20k
源码类别:
midi
开发平台:
Unix_Linux
- /**
- * @file xvideo.c
- * @brief X C Bindings video output module for VLC media player
- */
- /*****************************************************************************
- * Copyright © 2009 Rémi Denis-Courmont
- *
- * This library 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 2.0
- * of the License, or (at your option) any later version.
- *
- * This library 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 Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
- ****************************************************************************/
- #ifdef HAVE_CONFIG_H
- # include <config.h>
- #endif
- #include <stdlib.h>
- #include <assert.h>
- #include <xcb/xcb.h>
- #include <xcb/shm.h>
- #include <xcb/xv.h>
- #include <vlc_common.h>
- #include <vlc_plugin.h>
- #include <vlc_vout.h>
- #include <vlc_window.h>
- #include "xcb_vlc.h"
- #define DISPLAY_TEXT N_("X11 display")
- #define DISPLAY_LONGTEXT N_(
- "X11 hardware display to use. By default VLC will "
- "use the value of the DISPLAY environment variable.")
- #define SHM_TEXT N_("Use shared memory")
- #define SHM_LONGTEXT N_(
- "Use shared memory to communicate between VLC and the X server.")
- static int Open (vlc_object_t *);
- static void Close (vlc_object_t *);
- /*
- * Module descriptor
- */
- vlc_module_begin ()
- set_shortname (N_("XVideo"))
- set_description (N_("(Experimental) XVideo output"))
- set_category (CAT_VIDEO)
- set_subcategory (SUBCAT_VIDEO_VOUT)
- set_capability ("video output", 0)
- set_callbacks (Open, Close)
- add_string ("x11-display", NULL, NULL,
- DISPLAY_TEXT, DISPLAY_LONGTEXT, true)
- add_bool ("x11-shm", true, NULL, SHM_TEXT, SHM_LONGTEXT, true)
- add_shortcut ("xcb-xv")
- vlc_module_end ()
- struct vout_sys_t
- {
- xcb_connection_t *conn;
- xcb_xv_query_adaptors_reply_t *adaptors;
- vout_window_t *embed;/* VLC window */
- xcb_window_t window; /* drawable X window */
- xcb_gcontext_t gc; /* context to put images */
- xcb_xv_port_t port; /* XVideo port */
- uint32_t id; /* XVideo format */
- uint16_t width; /* display width */
- uint16_t height; /* display height */
- uint32_t data_size; /* picture byte size (for non-SHM) */
- bool shm; /* whether to use MIT-SHM */
- };
- static int Init (vout_thread_t *);
- static void Deinit (vout_thread_t *);
- static void Display (vout_thread_t *, picture_t *);
- static int Manage (vout_thread_t *);
- static int Control (vout_thread_t *, int, va_list);
- int CheckError (vout_thread_t *vout, const char *str, xcb_void_cookie_t ck)
- {
- xcb_generic_error_t *err;
- err = xcb_request_check (vout->p_sys->conn, ck);
- if (err)
- {
- msg_Err (vout, "%s: X11 error %d", str, err->error_code);
- return VLC_EGENERIC;
- }
- return VLC_SUCCESS;
- }
- /**
- * Check that the X server supports the XVideo extension.
- */
- static bool CheckXVideo (vout_thread_t *vout, xcb_connection_t *conn)
- {
- xcb_xv_query_extension_reply_t *r;
- xcb_xv_query_extension_cookie_t ck = xcb_xv_query_extension (conn);
- bool ok = false;
- r = xcb_xv_query_extension_reply (conn, ck, NULL);
- if (r != NULL)
- { /* We need XVideo 2.2 for PutImage */
- if ((r->major > 2) || (r->major == 2 && r->minor >= 2))
- {
- msg_Dbg (vout, "using XVideo extension v%"PRIu8".%"PRIu8,
- r->major, r->minor);
- ok = true;
- }
- else
- msg_Dbg (vout, "XVideo extension too old (v%"PRIu8".%"PRIu8,
- r->major, r->minor);
- free (r);
- }
- else
- msg_Dbg (vout, "XVideo extension not available");
- return ok;
- }
- /**
- * Get a list of XVideo adaptors for a given window.
- */
- static xcb_xv_query_adaptors_reply_t *GetAdaptors (vout_window_t *wnd,
- xcb_connection_t *conn)
- {
- xcb_xv_query_adaptors_cookie_t ck;
- ck = xcb_xv_query_adaptors (conn, wnd->handle.xid);
- return xcb_xv_query_adaptors_reply (conn, ck, NULL);
- }
- #define p_vout vout
- /**
- * Probe the X server.
- */
- static int Open (vlc_object_t *obj)
- {
- vout_thread_t *vout = (vout_thread_t *)obj;
- vout_sys_t *p_sys = malloc (sizeof (*p_sys));
- if (p_sys == NULL)
- return VLC_ENOMEM;
- vout->p_sys = p_sys;
- /* Connect to X */
- p_sys->conn = Connect (obj);
- if (p_sys->conn == NULL)
- {
- free (p_sys);
- return VLC_EGENERIC;
- }
- if (!CheckXVideo (vout, p_sys->conn))
- {
- msg_Warn (vout, "Please enable XVideo 2.2 for faster video display");
- xcb_disconnect (p_sys->conn);
- free (p_sys);
- return VLC_EGENERIC;
- }
- const xcb_screen_t *screen;
- p_sys->embed = GetWindow (vout, p_sys->conn, &screen, &p_sys->shm);
- if (p_sys->embed == NULL)
- {
- xcb_disconnect (p_sys->conn);
- free (p_sys);
- return VLC_EGENERIC;
- }
- /* Cache adaptors infos */
- p_sys->adaptors = GetAdaptors (p_sys->embed, p_sys->conn);
- if (p_sys->adaptors == NULL)
- goto error;
- /* Create window */
- {
- const uint32_t mask =
- /* XCB_CW_EVENT_MASK */
- XCB_EVENT_MASK_BUTTON_PRESS | XCB_EVENT_MASK_BUTTON_RELEASE |
- XCB_EVENT_MASK_POINTER_MOTION;
- xcb_void_cookie_t c;
- xcb_window_t window = xcb_generate_id (p_sys->conn);
- c = xcb_create_window_checked (p_sys->conn, screen->root_depth, window,
- p_sys->embed->handle.xid, 0, 0, 1, 1, 0,
- XCB_WINDOW_CLASS_INPUT_OUTPUT,
- screen->root_visual,
- XCB_CW_EVENT_MASK, &mask);
- if (CheckError (vout, "cannot create X11 window", c))
- goto error;
- p_sys->window = window;
- msg_Dbg (vout, "using X11 window %08"PRIx32, p_sys->window);
- xcb_map_window (p_sys->conn, window);
- }
- p_sys->gc = xcb_generate_id (p_sys->conn);
- xcb_create_gc (p_sys->conn, p_sys->gc, p_sys->window, 0, NULL);
- msg_Dbg (vout, "using X11 graphic context %08"PRIx32, p_sys->gc);
- vout->pf_init = Init;
- vout->pf_end = Deinit;
- vout->pf_display = Display;
- vout->pf_manage = Manage;
- vout->pf_control = Control;
- return VLC_SUCCESS;
- error:
- Close (obj);
- return VLC_EGENERIC;
- }
- /**
- * Disconnect from the X server.
- */
- static void Close (vlc_object_t *obj)
- {
- vout_thread_t *vout = (vout_thread_t *)obj;
- vout_sys_t *p_sys = vout->p_sys;
- free (p_sys->adaptors);
- vout_ReleaseWindow (p_sys->embed);
- xcb_disconnect (p_sys->conn);
- free (p_sys);
- }
- static vlc_fourcc_t ParseFormat (vout_thread_t *vout,
- const xcb_xv_image_format_info_t *restrict f)
- {
- if (f->byte_order != ORDER && f->bpp != 8)
- return 0; /* Argh! */
- switch (f->type)
- {
- case XCB_XV_IMAGE_FORMAT_INFO_TYPE_RGB:
- switch (f->num_planes)
- {
- case 1:
- switch (f->bpp)
- {
- case 32:
- if (f->depth == 24)
- return VLC_FOURCC ('R', 'V', '3', '2');
- break;
- case 24:
- if (f->depth == 24)
- return VLC_FOURCC ('R', 'V', '2', '4');
- break;
- case 16:
- if (f->depth == 16)
- return VLC_FOURCC ('R', 'V', '1', '6');
- if (f->depth == 15)
- return VLC_FOURCC ('R', 'V', '1', '5');
- break;
- case 8:
- if (f->depth == 8)
- return VLC_FOURCC ('R', 'G', 'B', '2');
- break;
- }
- break;
- }
- msg_Err (vout, "unknown XVideo RGB format %"PRIx32" (%.4s)",
- f->id, f->guid);
- msg_Dbg (vout, " %"PRIu8" planes, %"PRIu8" bits/pixel, "
- "depth %"PRIu8, f->num_planes, f->bpp, f->depth);
- break;
- case XCB_XV_IMAGE_FORMAT_INFO_TYPE_YUV:
- if (f->u_sample_bits != f->v_sample_bits
- || f->vhorz_u_period != f->vhorz_v_period
- || f->vvert_u_period != f->vvert_v_period
- || f->y_sample_bits != 8 || f->u_sample_bits != 8
- || f->vhorz_y_period != 1 || f->vvert_y_period != 1)
- goto bad;
- switch (f->num_planes)
- {
- case 1:
- switch (f->bpp)
- {
- /*untested: case 24:
- if (f->vhorz_u_period == 1 && f->vvert_u_period == 1)
- return VLC_FOURCC ('I', '4', '4', '4');
- break;*/
- case 16:
- if (f->vhorz_u_period == 2 && f->vvert_u_period == 1)
- {
- if (!strcmp ((const char *)f->vcomp_order, "YUYV"))
- return VLC_FOURCC ('Y', 'U', 'Y', '2');
- if (!strcmp ((const char *)f->vcomp_order, "UYVY"))
- return VLC_FOURCC ('U', 'Y', 'V', 'Y');
- }
- break;
- }
- break;
- case 3:
- switch (f->bpp)
- {
- case 12:
- if (f->vhorz_u_period == 2 && f->vvert_u_period == 2)
- {
- if (!strcmp ((const char *)f->vcomp_order, "YVU"))
- return VLC_FOURCC ('Y', 'V', '1', '2');
- if (!strcmp ((const char *)f->vcomp_order, "YUV"))
- return VLC_FOURCC ('I', '4', '2', '0');
- }
- }
- break;
- }
- bad:
- msg_Err (vout, "unknown XVideo YUV format %"PRIx32" (%.4s)", f->id,
- f->guid);
- msg_Dbg (vout, " %"PRIu8" planes, %"PRIu32" bits/pixel, "
- "%"PRIu32"/%"PRIu32"/%"PRIu32" bits/sample", f->num_planes,
- f->bpp, f->y_sample_bits, f->u_sample_bits, f->v_sample_bits);
- msg_Dbg (vout, " period: %"PRIu32"/%"PRIu32"/%"PRIu32"x"
- "%"PRIu32"/%"PRIu32"/%"PRIu32,
- f->vhorz_y_period, f->vhorz_u_period, f->vhorz_v_period,
- f->vvert_y_period, f->vvert_u_period, f->vvert_v_period);
- msg_Warn (vout, " order: %.32s", f->vcomp_order);
- break;
- }
- return 0;
- }
- static const xcb_xv_image_format_info_t *
- FindFormat (vout_thread_t *vout, vlc_fourcc_t chroma, xcb_xv_port_t port,
- const xcb_xv_list_image_formats_reply_t *list,
- xcb_xv_query_image_attributes_reply_t **restrict pa)
- {
- xcb_connection_t *conn = vout->p_sys->conn;
- const xcb_xv_image_format_info_t *f, *end;
- f = xcb_xv_list_image_formats_format (list);
- end = f + xcb_xv_list_image_formats_format_length (list);
- for (; f < end; f++)
- {
- if (chroma != ParseFormat (vout, f))
- continue;
- xcb_xv_query_image_attributes_reply_t *i;
- i = xcb_xv_query_image_attributes_reply (conn,
- xcb_xv_query_image_attributes (conn, port, f->id,
- vout->fmt_in.i_width, vout->fmt_in.i_height), NULL);
- if (i == NULL)
- continue;
- if (i->width != vout->fmt_in.i_width
- || i->height != vout->fmt_in.i_height)
- {
- msg_Warn (vout, "incompatible size %ux%u -> %"PRIu32"x%"PRIu32,
- vout->fmt_in.i_width, vout->fmt_in.i_height,
- i->width, i->height);
- free (i);
- continue;
- }
- *pa = i;
- return f;
- }
- return NULL;
- }
- /**
- * Allocate drawable window and picture buffers.
- */
- static int Init (vout_thread_t *vout)
- {
- vout_sys_t *p_sys = vout->p_sys;
- xcb_xv_query_image_attributes_reply_t *att = NULL;
- bool swap_planes = false; /* whether X wants V before U */
- /* FIXME: check max image size */
- xcb_xv_adaptor_info_iterator_t it;
- for (it = xcb_xv_query_adaptors_info_iterator (p_sys->adaptors);
- it.rem > 0;
- xcb_xv_adaptor_info_next (&it))
- {
- const xcb_xv_adaptor_info_t *a = it.data;
- /* FIXME: Open() should fail if none of the ports are usable to VLC */
- if (!(a->type & XCB_XV_TYPE_IMAGE_MASK))
- continue;
- xcb_xv_list_image_formats_reply_t *r;
- r = xcb_xv_list_image_formats_reply (p_sys->conn,
- xcb_xv_list_image_formats (p_sys->conn, a->base_id), NULL);
- if (r == NULL)
- continue;
- const xcb_xv_image_format_info_t *fmt;
- /* Video chroma in preference order */
- const vlc_fourcc_t chromas[] = {
- vout->fmt_in.i_chroma,
- VLC_FOURCC ('Y', 'U', 'Y', '2'),
- VLC_FOURCC ('R', 'V', '2', '4'),
- VLC_FOURCC ('R', 'V', '1', '5'),
- };
- for (size_t i = 0; i < sizeof (chromas) / sizeof (chromas[0]); i++)
- {
- vlc_fourcc_t chroma = chromas[i];
- fmt = FindFormat (vout, chroma, a->base_id, r, &att);
- if (fmt != NULL)
- {
- vout->output.i_chroma = chroma;
- goto found_format;
- }
- }
- free (r);
- continue;
- found_format:
- /* TODO: grab port */
- p_sys->port = a->base_id;
- msg_Dbg (vout, "using port %"PRIu32, p_sys->port);
- p_sys->id = fmt->id;
- msg_Dbg (vout, "using image format 0x%"PRIx32, p_sys->id);
- if (fmt->type == XCB_XV_IMAGE_FORMAT_INFO_TYPE_RGB)
- {
- vout->fmt_out.i_rmask = vout->output.i_rmask = fmt->red_mask;
- vout->fmt_out.i_gmask = vout->output.i_gmask = fmt->green_mask;
- vout->fmt_out.i_bmask = vout->output.i_bmask = fmt->blue_mask;
- }
- else
- if (fmt->num_planes == 3)
- swap_planes = !strcmp ((const char *)fmt->vcomp_order, "YVU");
- free (r);
- goto found_adaptor;
- }
- msg_Err (vout, "no available XVideo adaptor");
- return VLC_EGENERIC; /* no usable adaptor */
- /* Allocate picture buffers */
- const uint32_t *offsets;
- found_adaptor:
- offsets = xcb_xv_query_image_attributes_offsets (att);
- p_sys->data_size = att->data_size;
- I_OUTPUTPICTURES = 0;
- for (size_t index = 0; I_OUTPUTPICTURES < 2; index++)
- {
- picture_t *pic = vout->p_picture + index;
- if (index > sizeof (vout->p_picture) / sizeof (pic))
- break;
- if (pic->i_status != FREE_PICTURE)
- continue;
- vout_InitPicture (vout, pic, vout->output.i_chroma,
- att->width, att->height,
- vout->fmt_in.i_aspect);
- if (PictureAlloc (vout, pic, att->data_size,
- p_sys->shm ? p_sys->conn : NULL))
- break;
- /* Allocate further planes as specified by XVideo */
- /* We assume that offsets[0] is zero */
- for (int i = 1; i < pic->i_planes; i++)
- pic->p[i].p_pixels =
- pic->p->p_pixels + offsets[swap_planes ? (3 - i) : i];
- PP_OUTPUTPICTURE[I_OUTPUTPICTURES++] = pic;
- }
- free (att);
- unsigned x, y, width, height;
- if (GetWindowSize (p_sys->embed, p_sys->conn, &width, &height))
- return VLC_EGENERIC;
- vout_PlacePicture (vout, width, height, &x, &y, &width, &height);
- const uint32_t values[] = { x, y, width, height, };
- xcb_configure_window (p_sys->conn, p_sys->window,
- XCB_CONFIG_WINDOW_X | XCB_CONFIG_WINDOW_Y |
- XCB_CONFIG_WINDOW_WIDTH | XCB_CONFIG_WINDOW_HEIGHT,
- values);
- xcb_flush (p_sys->conn);
- p_sys->height = height;
- p_sys->width = width;
- vout->fmt_out.i_chroma = vout->output.i_chroma;
- vout->fmt_out.i_visible_width = vout->fmt_in.i_visible_width;
- vout->fmt_out.i_visible_height = vout->fmt_in.i_visible_height;
- vout->fmt_out.i_sar_num = vout->fmt_out.i_sar_den = 1;
- vout->output.i_width = vout->fmt_out.i_width = vout->fmt_in.i_width;
- vout->output.i_height = vout->fmt_out.i_height = vout->fmt_in.i_height;
- vout->fmt_out.i_x_offset = vout->fmt_in.i_x_offset;
- vout->fmt_out.i_y_offset = vout->fmt_in.i_y_offset;
- assert (height > 0);
- vout->output.i_aspect = vout->fmt_out.i_aspect =
- width * VOUT_ASPECT_FACTOR / height;
- return VLC_SUCCESS;
- }
- /**
- * Free picture buffers.
- */
- static void Deinit (vout_thread_t *vout)
- {
- vout_sys_t *p_sys = vout->p_sys;
- for (int i = 0; i < I_OUTPUTPICTURES; i++)
- PictureFree (PP_OUTPUTPICTURE[i], p_sys->conn);
- }
- /**
- * Sends an image to the X server.
- */
- static void Display (vout_thread_t *vout, picture_t *pic)
- {
- vout_sys_t *p_sys = vout->p_sys;
- xcb_shm_seg_t segment = (uintptr_t)pic->p_sys;
- if (segment)
- xcb_xv_shm_put_image (p_sys->conn, p_sys->port, p_sys->window,
- p_sys->gc, segment, p_sys->id, 0,
- /* Src: */ vout->fmt_out.i_x_offset,
- vout->fmt_out.i_y_offset,
- vout->fmt_out.i_visible_width,
- vout->fmt_out.i_visible_height,
- /* Dst: */ 0, 0, p_sys->width, p_sys->height,
- /* Memory: */
- pic->p->i_pitch / pic->p->i_pixel_pitch,
- pic->p->i_lines, false);
- else
- xcb_xv_put_image (p_sys->conn, p_sys->port, p_sys->window,
- p_sys->gc, p_sys->id,
- vout->fmt_out.i_x_offset, vout->fmt_out.i_y_offset,
- vout->fmt_out.i_visible_width,
- vout->fmt_out.i_visible_height,
- 0, 0, p_sys->width, p_sys->height,
- vout->fmt_out.i_width, vout->fmt_out.i_height,
- p_sys->data_size, pic->p->p_pixels);
- xcb_flush (p_sys->conn);
- }
- /**
- * Process incoming X events.
- */
- static int Manage (vout_thread_t *vout)
- {
- vout_sys_t *p_sys = vout->p_sys;
- xcb_generic_event_t *ev;
- while ((ev = xcb_poll_for_event (p_sys->conn)) != NULL)
- ProcessEvent (vout, p_sys->conn, p_sys->window, ev);
- if (xcb_connection_has_error (p_sys->conn))
- {
- msg_Err (vout, "X server failure");
- return VLC_EGENERIC;
- }
- CommonManage (vout);
- if (vout->i_changes & VOUT_SIZE_CHANGE)
- { /* TODO: factor this code with XV and X11 Init() */
- unsigned x, y, width, height;
- if (GetWindowSize (p_sys->embed, p_sys->conn, &width, &height))
- return VLC_EGENERIC;
- vout_PlacePicture (vout, width, height, &x, &y, &width, &height);
- const uint32_t values[] = { x, y, width, height, };
- xcb_configure_window (p_sys->conn, p_sys->window, XCB_CONFIG_WINDOW_X |
- XCB_CONFIG_WINDOW_Y | XCB_CONFIG_WINDOW_WIDTH |
- XCB_CONFIG_WINDOW_HEIGHT, values);
- vout->p_sys->width = width; // XXX: <-- this is useless, as the zoom is
- vout->p_sys->height = height; // handled with VOUT_SET_SIZE anyway.
- vout->i_changes &= ~VOUT_SIZE_CHANGE;
- }
- return VLC_SUCCESS;
- }
- void
- HandleParentStructure (vout_thread_t *vout, xcb_connection_t *conn,
- xcb_window_t xid, xcb_configure_notify_event_t *ev)
- {
- unsigned width, height, x, y;
- vout_PlacePicture (vout, ev->width, ev->height, &x, &y, &width, &height);
- /* Move the picture within the window */
- const uint32_t values[] = { x, y, width, height, };
- xcb_configure_window (conn, xid,
- XCB_CONFIG_WINDOW_X | XCB_CONFIG_WINDOW_Y
- | XCB_CONFIG_WINDOW_WIDTH | XCB_CONFIG_WINDOW_HEIGHT,
- values);
- vout->p_sys->width = width;
- vout->p_sys->height = height;
- }
- static int Control (vout_thread_t *vout, int query, va_list ap)
- {
- return vout_ControlWindow (vout->p_sys->embed, query, ap);
- }