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annotate jag_video.h @ 1971:80920c21bb52

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Add an event log soft flush and call it twice per frame in between hard flushes to netplay latency when there are insufficient hardware updates to flush packets in the middle of a frame
author Michael Pavone <pavone@retrodev.com>
date Fri, 08 May 2020 11:40:30 -0700
parents faa3a4617f62
children
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1 #ifndef JAG_VIDEO_H_
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2 #define JAG_VIDEO_H_
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3
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4 enum {
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5 VID_HCOUNT,
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6 VID_VCOUNT,
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7 VID_HLPEN,
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8 VID_VLPEN,
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9 VID_REG_C,
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10 VID_REG_E,
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11 VID_OBJ0,
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12 VID_OBJ1,
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13 VID_OBJ2,
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14 VID_OBJ3,
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15 VID_REG_18,
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16 VID_REG_1A,
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17 VID_REG_1C,
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18 VID_REG_1E,
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19 VID_OBJLIST1,
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20 VID_OBJLIST2,
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21 VID_REG_24,
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22 VID_OBJFLAG,
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23 VID_VMODE,
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24 VID_BORDER_RG,
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25 VID_BORDER_B,
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26 VID_HPERIOD,
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27 VID_HBLANK_BEGIN,
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28 VID_HBLANK_END,
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29 VID_HSYNC,
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30 VID_HVSYNC,
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31 VID_HDISP_BEGIN1,
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32 VID_HDISP_BEGIN2,
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33 VID_HDISP_END,
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34 VID_VPERIOD,
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35 VID_VBLANK_BEGIN,
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36 VID_VBLANK_END,
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37 VID_VSYNC,
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38 VID_VDISP_BEGIN,
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39 VID_VDISP_END,
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40 VID_VEQUAL_BEGIN,
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41 VID_VEQUAL_END,
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42 VID_VINT,
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43 VID_PIT0,
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44 VID_PIT1,
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45 VID_HEQUAL_END,
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46 VID_REG_56,
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47 VID_BGCOLOR,
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48 JAG_VIDEO_REGS
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49 };
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50 #define LINEBUFFER_WORDS 720
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51
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52 typedef struct {
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53 uint64_t im_data;
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54 uint64_t prefetch;
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55 uint32_t cycles;
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56 uint32_t obj_start;
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57 uint32_t link;
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58 uint32_t data_address;
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59 uint32_t cur_address;
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60 uint32_t increment;
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61 uint32_t line_pitch;
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62 uint32_t lb_offset;
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63 int16_t xpos;
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64 uint16_t ypos;
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65 uint16_t height;
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66 int16_t hscale;
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67 int16_t vscale;
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68 int16_t hremainder;
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69 int16_t remainder;
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70 uint8_t bpp;
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71 uint8_t line_phrases;
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72 uint8_t state;
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73 uint8_t type;
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74 uint8_t im_bits;
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75 uint8_t pal_offset;
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76 uint8_t has_prefetch;
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77 uint8_t hflip;
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78 uint8_t addpixels;
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79 uint8_t transparent;
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80 uint8_t leftclip;
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81 } object_processor;
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82
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83 typedef struct {
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84 void *system;
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85 uint32_t *output;
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86 uint32_t output_pitch;
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87 uint16_t regs[JAG_VIDEO_REGS];
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88
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89 uint16_t clut[256];
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90 uint16_t line_buffer_a[LINEBUFFER_WORDS];
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91 uint16_t line_buffer_b[LINEBUFFER_WORDS];
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92 uint16_t *write_line_buffer;
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93
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94 uint32_t cycles;
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95 uint32_t op_cycles;
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96 uint8_t pclock_div;
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97 uint8_t pclock_counter;
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98 uint8_t mode;
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99 uint8_t cpu_int_pending;
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100
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101 object_processor op;
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102
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103 } jag_video;
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104
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105
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106 jag_video *jag_video_init(void);
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107 void jag_video_run(jag_video *context, uint32_t target_cycle);
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108 void jag_video_reg_write(jag_video *context, uint32_t address, uint16_t value);
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109 uint32_t jag_next_vid_interrupt(jag_video *context);
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110
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111 #endif //JAG_VIDEO_H_