|
1849
|
1 /*
|
|
|
2 pygame - Python Game Library
|
|
|
3
|
|
|
4 This library is free software; you can redistribute it and/or
|
|
|
5 modify it under the terms of the GNU Library General Public
|
|
|
6 License as published by the Free Software Foundation; either
|
|
|
7 version 2 of the License, or (at your option) any later version.
|
|
|
8
|
|
|
9 This library is distributed in the hope that it will be useful,
|
|
|
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
|
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
|
12 Library General Public License for more details.
|
|
|
13
|
|
|
14 You should have received a copy of the GNU Library General Public
|
|
|
15 License along with this library; if not, write to the Free
|
|
|
16 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
|
17
|
|
|
18 */
|
|
|
19
|
|
|
20 /*
|
|
|
21 * _movie - movie support for pygame with ffmpeg
|
|
|
22 * Author: Tyler Laing
|
|
|
23 *
|
|
|
24 * This module allows for the loading of, playing, pausing, stopping, and so on
|
|
|
25 * of a video file. Any format supported by ffmpeg is supported by this
|
|
|
26 * video player. Any bugs, please email trinioler@gmail.com :)
|
|
|
27 */
|
|
|
28
|
|
|
29
|
|
|
30 #ifndef _GCOMMAND_H_
|
|
|
31 #define _GCOMMAND_H_
|
|
|
32 #include <SDL.h>
|
|
|
33 #include <SDL_thread.h>
|
|
|
34 #include <Python.h>
|
|
|
35
|
|
|
36
|
|
|
37 /* Documentation: Command Queue Infrastructure
|
|
|
38 * This lower-level infrastructure code is meant to provide greater stability and
|
|
|
39 * thread safety to the _movie module. Since we cannot manipulate the SDL event queue
|
|
|
40 * we have to use our own hand-rolled solution. It is just a singly linked list,
|
|
|
41 * with references to the first and last item, allowing us to do a
|
|
|
42 * simple push/pop implementation. The items in the list are structs that have
|
|
|
43 * all the first members of the default Command struct, making it safe to
|
|
|
44 * cast the pointers from the pseudo-Command structs to a pointer to
|
|
|
45 * Command struct. Realistically, you can cast any pointer to any other kind of
|
|
|
46 * pointer(as long as they are the same size!), and C will let you. This is dangerous,
|
|
|
47 * and should only be done very, very carefully. This facility is only useful
|
|
|
48 * when you need a OO approach, like we did here.
|
|
|
49 *
|
|
|
50 * When making new commands, use the FULL_COMMAND macro, and add a line to registerCommands
|
|
|
51 * in _gmovie.c to add a new type value. This also enables future proofing as any changes to
|
|
|
52 * the Command struct will be opaque to the user... mostly.
|
|
|
53 *
|
|
|
54 * -Tyler Laing, August 4th, 2009
|
|
|
55 */
|
|
|
56
|
|
|
57 typedef struct Command
|
|
|
58 {
|
|
|
59 int type;
|
|
|
60 struct Command *next;
|
|
|
61 } Command;
|
|
|
62
|
|
|
63 #define FULL_COMMAND \
|
|
|
64 int type;\
|
|
|
65 struct Command *next;
|
|
|
66
|
|
|
67 typedef struct CommandQueue
|
|
|
68 {
|
|
|
69 int size;
|
|
|
70 SDL_mutex *q_mutex;
|
|
|
71 Command *first;
|
|
|
72 Command *last;
|
|
|
73 int registry[1024];
|
|
|
74 int reg_ix;
|
|
|
75 } CommandQueue;
|
|
|
76
|
|
|
77
|
|
|
78 void addCommand(CommandQueue *q, Command *comm);
|
|
|
79 Command *getCommand(CommandQueue *q);
|
|
|
80 int hasCommand(CommandQueue *q);
|
|
|
81 void flushCommands(CommandQueue *q);
|
|
|
82 int registerCommand(CommandQueue *q);
|
|
|
83
|
|
|
84 //convience function for allocating a new command, and ensuring its type is set properly.
|
|
|
85 #define ALLOC_COMMAND(command, name) command* name = (command *)PyMem_Malloc(sizeof(command)); name->type=movie->command##Type;
|
|
|
86
|
|
|
87 #endif /*_GCOMMAND_H_*/
|
