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1849
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1 /*
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2 pygame - Python Game Library
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3
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4 This library is free software; you can redistribute it and/or
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5 modify it under the terms of the GNU Library General Public
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6 License as published by the Free Software Foundation; either
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7 version 2 of the License, or (at your option) any later version.
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8
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9 This library is distributed in the hope that it will be useful,
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10 but WITHOUT ANY WARRANTY; without even the implied warranty of
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11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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12 Library General Public License for more details.
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13
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14 You should have received a copy of the GNU Library General Public
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15 License along with this library; if not, write to the Free
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16 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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17
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18 */
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19
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20 /*
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21 * _movie - movie support for pygame with ffmpeg
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22 * Author: Tyler Laing
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23 *
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24 * This module allows for the loading of, playing, pausing, stopping, and so on
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25 * of a video file. Any format supported by ffmpeg is supported by this
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26 * video player. Any bugs, please email trinioler@gmail.com :)
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27 */
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28
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29 #include "_gcommand.h"
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30
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31 /* command queue management routines... I make a lot of queues, don't I? */
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32 void addCommand(CommandQueue *q, Command *comm)
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33 {
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34 SDL_LockMutex(q->q_mutex);
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35 comm->next=NULL;
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36 q->registry[comm->type]++;
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37 if(!q->size)
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38 {
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39 q->first=comm;
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40 q->size++;
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41 SDL_UnlockMutex(q->q_mutex);
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42 return;
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43 }
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44 if(q->size==1)
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45 {
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46 q->last=comm;
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47 q->first->next=comm;
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48 q->size++;
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49 SDL_UnlockMutex(q->q_mutex);
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50 return;
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51 }
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52 q->last->next=comm;
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53 q->last=comm;
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54 q->size++;
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55 SDL_UnlockMutex(q->q_mutex);
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56 return;
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57 }
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58
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59 Command *getCommand(CommandQueue *q)
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60 {
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61 SDL_LockMutex(q->q_mutex);
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62 Command *comm;
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63 if(!q->last && q->first)
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64 {
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65 comm=q->first;
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66 q->size--;
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67 SDL_UnlockMutex(q->q_mutex);
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68 return comm;
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69 }
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70 else if (!q->last && !q->first)
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71 {
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72 SDL_UnlockMutex(q->q_mutex);
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73 return NULL;
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74 }
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75 comm=q->first;
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76 q->first=q->first->next;
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77 q->size--;
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78 SDL_UnlockMutex(q->q_mutex);
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79 return comm;
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80 }
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81
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82 inline int hasCommand(CommandQueue *q)
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83 {
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84 if(q->size>0)
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85 return 1;
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86 return 0;
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87 }
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88
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89 void flushCommands(CommandQueue *q)
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90 {
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91 SDL_LockMutex(q->q_mutex);
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92 Command *prev;
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93 Command *cur = q->first;
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94 while(cur!=NULL)
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95 {
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96 prev=cur;
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97 cur=cur->next;
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98 PyMem_Free(prev);
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99 q->size--;
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100 }
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101 SDL_UnlockMutex(q->q_mutex);
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102 }
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103
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104 /* registers a command with a particular movie object's command queue.
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105 * Basically, this means, theoretically, different movie objects could have different commands...
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106 */
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107 int registerCommand(CommandQueue *q)
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108 {
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109 //int cur = q->reg_ix;
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110 if(q->reg_ix>=1024)
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111 q->reg_ix=0;
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112 q->registry[q->reg_ix]=0;
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113 q->reg_ix++;
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114 return q->reg_ix-1;
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115 }
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