1 | ///////////////////////////////////////////////////////////////////////////////////////// |
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2 | // File : mjpeg.c |
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3 | // Date : octobre 2015 |
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4 | // author : Alain Greiner |
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5 | ///////////////////////////////////////////////////////////////////////////////////////// |
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6 | // This multi-threaded application illustrates "pipe-line" parallelism, and message |
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7 | // passing programming model, on top of the POSIX threads API. |
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8 | // It makes the parallel decompression of a MJPEG bitstream contained in a file. |
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9 | // The application is described as a TCG (Task and Communication Graph), and all |
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10 | // communications between threads uses MWMR channels,. |
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11 | // It uses the chained buffer DMA component to display the images on the graphic display. |
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12 | // It contains 5 types of threads, plus the "main" thread, that makes initialisation, |
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13 | // dispatch the byte stream to the various pipelines, and makes instrumentation. |
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14 | // and 7 types of MWMR communication channels: |
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15 | // - the main thread is only mapped in cluster[0,0], but all other threads |
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16 | // (DEMUX, VLD, IQZZ, IDCT, LIBU) are replicated in all clusters. |
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17 | // - all MWMR channels are replicated in all clusters. |
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18 | // The number of cluster cannot be larger than 16*16. |
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19 | // The number of processors per cluster is not constrained. |
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20 | // The frame buffer size must fit the decompressed images size. |
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21 | // It uses one TTY terminal shared by all tasks. |
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22 | ///////////////////////////////////////////////////////////////////////////////////////// |
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23 | |
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24 | #include <stdio.h> |
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25 | #include <mwmr_channel.h> |
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26 | #include <malloc.h> |
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27 | #include <stdlib.h> |
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28 | #include <string.h> |
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29 | #include "mjpeg.h" |
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30 | #include <mapping_info.h> // for coprocessor types and modes |
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31 | |
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32 | |
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33 | // macro to use a shared TTY |
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34 | #define PRINTF(...) do { lock_acquire( &tty_lock ); \ |
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35 | giet_tty_printf(__VA_ARGS__); \ |
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36 | lock_release( &tty_lock ); } while(0); |
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37 | |
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38 | /////////////////////////////////////////////// |
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39 | // Global variables |
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40 | /////////////////////////////////////////////// |
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41 | |
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42 | uint32_t fd; // file descriptor for the file containing the MJPEG stream |
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43 | |
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44 | // arrays of pointers on MWMR channels |
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45 | mwmr_channel_t* main_2_demux[256]; // one per cluster |
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46 | mwmr_channel_t* demux_2_vld_data[256]; // one per cluster |
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47 | mwmr_channel_t* demux_2_vld_huff[256]; // one per cluster |
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48 | mwmr_channel_t* demux_2_iqzz[256]; // one per cluster |
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49 | mwmr_channel_t* vld_2_iqzz[256]; // one per cluster |
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50 | mwmr_channel_t* iqzz_2_idct[256]; // one per cluster |
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51 | mwmr_channel_t* idct_2_libu[256]; // one per cluster |
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52 | |
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53 | // thread trdid ( for pthread_create() and pthread_join() ) |
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54 | pthread_t trdid_demux[256]; // one per cluster |
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55 | pthread_t trdid_vld[256]; // one per cluster |
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56 | pthread_t trdid_iqzz[256]; // one per cluster |
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57 | pthread_t trdid_idct[256]; // one per cluster |
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58 | pthread_t trdid_libu[256]; // one per cluster |
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59 | |
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60 | user_lock_t tty_lock; // lock protecting shared TTY |
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61 | |
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62 | uint8_t* cma_buf[256]; // CMA buffers (one per cluster) |
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63 | void* cma_sts[256]; // CMA buffers status |
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64 | |
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65 | uint32_t fbf_width; // Frame Buffer width |
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66 | uint32_t fbf_height; // Frame Buffer height |
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67 | |
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68 | uint32_t nblocks_h; // number of blocks in a column |
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69 | uint32_t nblocks_w; // number of blocks in a row |
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70 | |
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71 | uint32_t date[MAX_IMAGES]; // date of libu completion |
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72 | |
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73 | //////////////////////////////////////////////// |
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74 | // declare thread functions |
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75 | //////////////////////////////////////////////// |
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76 | |
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77 | extern void demux( uint32_t index ); |
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78 | extern void vld( uint32_t index ); |
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79 | extern void iqzz( uint32_t index ); |
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80 | extern void idct( uint32_t index ); |
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81 | extern void libu( uint32_t index ); |
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82 | |
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83 | ///////////////////////////////////////// |
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84 | __attribute__ ((constructor)) void main() |
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85 | ///////////////////////////////////////// |
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86 | { |
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87 | // get platform parameters |
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88 | uint32_t x_size; |
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89 | uint32_t y_size; |
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90 | uint32_t nprocs; |
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91 | giet_procs_number( &x_size , &y_size , &nprocs ); |
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92 | |
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93 | // shared TTY allocation |
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94 | giet_tty_alloc( 1 ); |
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95 | lock_init( &tty_lock ); |
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96 | |
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97 | // check platform parameters |
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98 | giet_pthread_assert( (nprocs <= 6), |
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99 | "[MJPEG ERROR] nprocs cannot be larger than 4"); |
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100 | |
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101 | giet_pthread_assert( (x_size <= 16), |
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102 | "[MJPEG ERROR] x_size cannot be larger than 16"); |
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103 | |
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104 | giet_pthread_assert( (y_size <= 16), |
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105 | "[MJPEG ERROR] y_size cannot be larger than 16"); |
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106 | |
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107 | giet_pthread_assert( (MAX_IMAGES >= (x_size*y_size)), |
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108 | "MJPEG ERROR] number of images smaller than x_size * y_size"); |
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109 | |
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110 | // check frame buffer size |
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111 | giet_fbf_size( &fbf_width , &fbf_height ); |
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112 | |
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113 | giet_pthread_assert( ((fbf_width & 0x7) == 0) && ((fbf_height & 0x7) == 0) , |
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114 | "[MJPEG ERROR] image width and height must be multiple of 8"); |
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115 | |
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116 | // request frame buffer and CMA channel allocation |
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117 | giet_fbf_alloc(); |
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118 | giet_fbf_cma_alloc( x_size * y_size ); |
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119 | |
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120 | // file name and image size acquisition |
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121 | char file_pathname[256]; |
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122 | uint32_t image_width; |
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123 | uint32_t image_height; |
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124 | uint32_t fd; // file descriptor |
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125 | |
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126 | if ( INTERACTIVE_MODE ) |
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127 | { |
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128 | PRINTF("\n[MJPEG] enter path for JPEG stream file (default is plan_48.mjpg)\n> "); |
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129 | giet_tty_gets( file_pathname , 256 ); |
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130 | |
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131 | if ( file_pathname[0] == 0 ) |
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132 | { |
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133 | strcpy( file_pathname , "/misc/plan_48.mjpg" ); |
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134 | image_width = 48; |
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135 | image_height = 48; |
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136 | } |
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137 | else |
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138 | { |
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139 | PRINTF("\n[MJPEG] enter image width\n> "); |
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140 | giet_tty_getw( &image_width ); |
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141 | PRINTF("\n[MJPEG] enter image height\n> "); |
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142 | giet_tty_getw( &image_height ); |
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143 | PRINTF("\n"); |
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144 | } |
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145 | } |
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146 | else |
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147 | { |
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148 | strcpy( file_pathname , "/misc/plan_48.mjpg" ); |
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149 | image_width = 48; |
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150 | image_height = 48; |
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151 | } |
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152 | |
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153 | giet_pthread_assert( (image_width == fbf_width) && (image_height == fbf_height) , |
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154 | "[MJPEG ERROR] image size doesn't fit frame buffer size"); |
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155 | |
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156 | if ( USE_DCT_COPROC ) |
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157 | { |
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158 | PRINTF("\n\n[MJPEG] stream %s / %d clusters / %d cores / DCT COPROC\n\n", |
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159 | file_pathname , x_size*y_size , nprocs ); |
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160 | } |
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161 | else |
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162 | { |
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163 | PRINTF("\n\n[MJPEG] stream %s / %d clusters / %d cores / NO DCT COPROC\n\n", |
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164 | file_pathname , x_size*y_size , nprocs ); |
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165 | } |
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166 | |
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167 | // compute nblocks_h & nblocks_w |
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168 | nblocks_w = fbf_width / 8; |
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169 | nblocks_h = fbf_height / 8; |
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170 | |
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171 | // open file containing the MJPEG bit stream |
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172 | fd = giet_fat_open( file_pathname , 0 ); |
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173 | |
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174 | giet_pthread_assert( (fd >= 0), |
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175 | "[MJPEG ERROR] cannot open MJPEG stream file"); |
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176 | |
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177 | // index for loops |
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178 | uint32_t x; |
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179 | uint32_t y; |
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180 | uint32_t n; |
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181 | |
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182 | uint32_t* buffer; |
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183 | |
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184 | // initialise distributed heap, |
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185 | // allocate MWMR channels |
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186 | // allocate buffers for CMA |
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187 | for ( x = 0 ; x < x_size ; x++ ) |
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188 | { |
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189 | for ( y = 0 ; y < y_size ; y++ ) |
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190 | { |
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191 | uint32_t index = x*y_size + y; |
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192 | |
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193 | // initialise heap[x][y] |
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194 | heap_init( x , y ); |
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195 | |
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196 | // allocate MWMR channels in cluster[x][y] |
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197 | main_2_demux[index] = remote_malloc( sizeof( mwmr_channel_t ) , x , y ); |
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198 | buffer = remote_malloc( 4 * MAIN_2_DEMUX_DEPTH , x , y ); |
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199 | mwmr_init( main_2_demux[index] , buffer , 1 , MAIN_2_DEMUX_DEPTH ); |
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200 | |
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201 | demux_2_vld_data[index] = remote_malloc( sizeof( mwmr_channel_t ) , x , y ); |
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202 | buffer = remote_malloc( 4 * DEMUX_2_VLD_DATA_DEPTH , x , y ); |
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203 | mwmr_init( demux_2_vld_data[index] , buffer , 1 , DEMUX_2_VLD_DATA_DEPTH ); |
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204 | |
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205 | demux_2_vld_huff[index] = remote_malloc( sizeof( mwmr_channel_t ) , x , y ); |
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206 | buffer = remote_malloc( 4 * DEMUX_2_VLD_HUFF_DEPTH , x , y ); |
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207 | mwmr_init( demux_2_vld_huff[index] , buffer , 1 , DEMUX_2_VLD_HUFF_DEPTH ); |
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208 | |
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209 | demux_2_iqzz[index] = remote_malloc( sizeof( mwmr_channel_t ) , x , y ); |
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210 | buffer = remote_malloc( 4 * DEMUX_2_IQZZ_DEPTH , x , y ); |
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211 | mwmr_init( demux_2_iqzz[index] , buffer , 1 , DEMUX_2_IQZZ_DEPTH ); |
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212 | |
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213 | vld_2_iqzz[index] = remote_malloc( sizeof( mwmr_channel_t ) , x , y ); |
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214 | buffer = remote_malloc( 4 * VLD_2_IQZZ_DEPTH , x , y ); |
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215 | mwmr_init( vld_2_iqzz[index] , buffer , 1 , VLD_2_IQZZ_DEPTH ); |
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216 | |
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217 | iqzz_2_idct[index] = remote_malloc( sizeof( mwmr_channel_t ) , x , y ); |
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218 | buffer = remote_malloc( 4 * IQZZ_2_IDCT_DEPTH , x , y ); |
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219 | mwmr_init( iqzz_2_idct[index] , buffer , 1 , IQZZ_2_IDCT_DEPTH ); |
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220 | |
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221 | idct_2_libu[index] = remote_malloc( sizeof( mwmr_channel_t ) , x , y ); |
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222 | buffer = remote_malloc( 4 * IDCT_2_LIBU_DEPTH , x , y ); |
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223 | mwmr_init( idct_2_libu[index] , buffer , 1 , IDCT_2_LIBU_DEPTH ); |
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224 | |
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225 | // allocate and register CMA buffers in cluster[x][y] |
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226 | cma_buf[index] = remote_malloc( fbf_width * fbf_height , x , y ); |
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227 | cma_sts[index] = remote_malloc( 64 , x , y ); |
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228 | giet_fbf_cma_init_buf( index , cma_buf[index] , cma_sts[index] ); |
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229 | } |
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230 | } |
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231 | |
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232 | // start CMA channel |
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233 | giet_fbf_cma_start(); |
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234 | |
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235 | mwmr_channel_t* pc; |
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236 | |
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237 | for ( n = 0 ; n < x_size*y_size ; n++ ) |
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238 | { |
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239 | pc = main_2_demux[n]; |
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240 | PRINTF(" - main_2_demux[%d] = %x / &lock = %x / &buf = %x / size = %d\n", |
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241 | n, pc, (uint32_t)&pc->lock, (uint32_t)pc->data, pc->depth<<2 ); |
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242 | |
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243 | pc = demux_2_vld_data[n]; |
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244 | PRINTF(" - demux_2_vld[%d] = %x / &lock = %x / &buf = %x / size = %d\n", |
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245 | n, pc, (uint32_t)&pc->lock, (uint32_t)pc->data, pc->depth<<2 ); |
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246 | |
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247 | pc = vld_2_iqzz[n]; |
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248 | PRINTF(" - vld_2_iqzz[%d] = %x / &lock = %x / &buf = %x / size = %d\n", |
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249 | n, pc, (uint32_t)&pc->lock, (uint32_t)pc->data, pc->depth<<2 ); |
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250 | |
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251 | pc = iqzz_2_idct[n]; |
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252 | PRINTF(" - iqzz_2_idct[%d] = %x / &lock = %x / &buf = %x / size = %d\n", |
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253 | n, pc, (uint32_t)&pc->lock, (uint32_t)pc->data, pc->depth<<2 ); |
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254 | |
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255 | pc = idct_2_libu[n]; |
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256 | PRINTF(" - idct_2_libu[%d] = %x / &lock = %x / &buf = %x / size = %d\n", |
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257 | n, pc, (uint32_t)&pc->lock, (uint32_t)pc->data, pc->depth<<2 ); |
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258 | } |
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259 | |
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260 | // launch all threads : precise mapping is defined in the mjpeg.py file |
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261 | uint32_t index; |
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262 | |
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263 | for ( x = 0 ; x < x_size ; x++ ) |
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264 | { |
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265 | for ( y = 0 ; y < y_size ; y++ ) |
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266 | { |
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267 | index = x * y_size + y; |
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268 | |
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269 | // DEMUX |
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270 | if ( giet_pthread_create( &trdid_demux[index], NULL, &demux , (void*)index ) ) |
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271 | giet_pthread_exit( "error launching thread demux\n"); |
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272 | |
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273 | // VLD |
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274 | if ( giet_pthread_create( &trdid_vld[index], NULL, &vld , (void*)index ) ) |
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275 | giet_pthread_exit( "error launching thread vld\n"); |
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276 | |
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277 | // IQZZ |
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278 | if ( giet_pthread_create( &trdid_iqzz[index], NULL, &iqzz , (void*)index ) ) |
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279 | giet_pthread_exit( "error launching thread iqzz"); |
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280 | |
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281 | // IDCT |
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282 | if ( USE_DCT_COPROC ) // allocate, initialise, and start hardware coprocessor |
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283 | { |
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284 | giet_coproc_channel_t in_channel; |
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285 | giet_coproc_channel_t out_channel; |
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286 | uint32_t cluster_xy = (x<<4) + y; |
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287 | uint32_t coproc_type = 2; |
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288 | uint32_t info; |
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289 | |
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290 | // allocate DCT coprocessor |
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291 | giet_coproc_alloc( cluster_xy , coproc_type , &info ); |
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292 | |
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293 | // initialize channels |
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294 | in_channel.channel_mode = MODE_MWMR; |
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295 | in_channel.buffer_size = (iqzz_2_idct[index]->depth)<<2; |
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296 | in_channel.buffer_vaddr = (uint32_t)(iqzz_2_idct[index]->data); |
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297 | in_channel.status_vaddr = (uint32_t)(&iqzz_2_idct[index]->sts); |
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298 | in_channel.lock_vaddr = (uint32_t)(&iqzz_2_idct[index]->lock); |
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299 | |
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300 | giet_coproc_channel_init( cluster_xy , coproc_type , 0 , &in_channel ); |
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301 | |
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302 | out_channel.channel_mode = MODE_MWMR; |
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303 | out_channel.buffer_size = (idct_2_libu[index]->depth)<<2; |
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304 | out_channel.buffer_vaddr = (uint32_t)(idct_2_libu[index]->data); |
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305 | out_channel.status_vaddr = (uint32_t)(&idct_2_libu[index]->sts); |
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306 | out_channel.lock_vaddr = (uint32_t)(&idct_2_libu[index]->lock); |
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307 | |
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308 | giet_coproc_channel_init( cluster_xy , coproc_type , 1 , &out_channel ); |
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309 | |
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310 | // start coprocessor |
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311 | giet_coproc_run( cluster_xy , coproc_type ); |
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312 | } |
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313 | else // launches a software thread |
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314 | { |
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315 | if ( giet_pthread_create( &trdid_idct[index], NULL, &idct , (void*)index ) ) |
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316 | giet_pthread_exit( "error launching thread idct\n"); |
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317 | } |
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318 | |
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319 | // LIBU |
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320 | if ( giet_pthread_create( &trdid_libu[index], NULL, &libu , (void*)index ) ) |
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321 | giet_pthread_exit( "error launching thread libu\n"); |
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322 | } |
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323 | } |
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324 | |
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325 | ///////////////////////////////////////////////////////////////////////////////////// |
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326 | // dispatch the byte stream to the demux threads, one compressed image per cluster. |
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327 | // It transfer the stream from the file identified by the fd argument to a 1024 |
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328 | // bytes local buffer. It analyses the stream to detect the End_of_Image markers. |
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329 | // All the bytes corresponding to a single image from the first byte, to the EOI |
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330 | // marker included, are written in the main_2_demux[index] channel, in increasing |
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331 | // order of the cluster index. |
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332 | ///////////////////////////////////////////////////////////////////////////////////// |
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333 | |
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334 | // allocate input buffer : 1024 bytes |
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335 | uint8_t bufin[1024]; |
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336 | |
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337 | // allocate output bufio to access output MWMR channels : 64 bytes == 16 words |
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338 | mwmr_bufio_t bufio; |
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339 | uint8_t bufout[64]; |
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340 | mwmr_bufio_init( &bufio , bufout , 64 , 0 , main_2_demux[0] ); |
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341 | |
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342 | uint32_t image; // image index |
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343 | uint32_t cluster; // cluster index / modulo x_size*y_size |
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344 | uint32_t ptr; // byte pointer in input buffer |
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345 | uint32_t eoi_found; // boolean : End-of-Image found |
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346 | uint32_t ff_found; // boolean : 0xFF value found |
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347 | uint32_t bytes_count; // mumber of bytes in compressed image |
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348 | |
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349 | // initialise image and cluster index, and bufin pointer |
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350 | image = 0; |
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351 | cluster = 0; |
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352 | ptr = 0; |
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353 | |
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354 | while( image < MAX_IMAGES ) // one compressed image per iteration |
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355 | { |
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356 | // initialise image specific variables |
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357 | eoi_found = 0; |
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358 | ff_found = 0; |
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359 | bytes_count = 0; |
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360 | |
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361 | // re-initialise the destination buffer for each image |
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362 | bufio.mwmr = main_2_demux[cluster]; |
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363 | |
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364 | // scan bit stream until EOI found |
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365 | // transfer one byte per iteration from input buffer to output bufio |
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366 | while ( eoi_found == 0 ) |
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367 | { |
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368 | // - tranfer 1024 bytes from file to input buffer when input buffer empty. |
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369 | // - return to first byte in input file when EOF found, |
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370 | // to emulate an infinite stream of images. |
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371 | if ( ptr == 0 ) |
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372 | { |
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373 | uint32_t r = giet_fat_read( fd , bufin , 1024 ); |
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374 | if ( r < 1024 ) |
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375 | { |
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376 | giet_fat_lseek( fd , 0 , SEEK_SET ); |
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377 | giet_fat_read( fd , bufin + r , 1024 - r ); |
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378 | } |
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379 | } |
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380 | |
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381 | // transfer one byte from input buffer to output bufio |
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382 | mwmr_bufio_write_byte( &bufio , bufin[ptr] ); |
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383 | |
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384 | // analyse this byte to find EOI marker OxFFD8 |
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385 | // flush the output buffer when EOI found |
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386 | if ( ff_found ) // possible End of Image |
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387 | { |
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388 | ff_found = 0; |
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389 | if ( bufin[ptr] == 0xD9 ) // End of Image found |
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390 | { |
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391 | // exit current image |
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392 | eoi_found = 1; |
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393 | |
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394 | // flush output bufio |
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395 | mwmr_bufio_flush( &bufio ); |
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396 | } |
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397 | } |
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398 | else // test if first byte of a marker |
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399 | { |
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400 | if ( bufin[ptr] == 0xFF ) ff_found = 1; |
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401 | } |
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402 | |
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403 | // increment input buffer pointer modulo 1024 |
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404 | ptr++; |
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405 | if ( ptr == 1024 ) ptr = 0; |
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406 | |
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407 | // increment bytes_count for current image |
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408 | bytes_count++; |
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409 | |
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410 | } // end while (eoi) |
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411 | |
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412 | #if DEBUG_MAIN |
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413 | PRINTF("\nMAIN send image %d to cluster %d at cycle %d : %d bytes\n", |
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414 | image , cluster , giet_proctime() , bytes_count ); |
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415 | #endif |
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416 | // increment image index |
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417 | image++; |
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418 | |
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419 | // increment cluster index modulo (x_size*y_size) |
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420 | cluster++; |
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421 | if (cluster == x_size * y_size) cluster = 0; |
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422 | |
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423 | } // end while on images |
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424 | |
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425 | ///////////////////////////////////////////////////////////////////////////////////// |
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426 | // wait all threads completion |
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427 | ///////////////////////////////////////////////////////////////////////////////////// |
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428 | |
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429 | for ( x = 0 ; x < x_size ; x++ ) |
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430 | { |
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431 | for ( y = 0 ; y < y_size ; y++ ) |
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432 | { |
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433 | index = x * y_size + y; |
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434 | |
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435 | if ( giet_pthread_join( trdid_demux[index] , NULL ) ) |
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436 | PRINTF("\n[MJPEG ERROR] calling giet_pthread_join() for demux[%d]\n", index ); |
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437 | |
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438 | if ( giet_pthread_join( trdid_vld[index] , NULL ) ) |
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439 | PRINTF("\n[MJPEG ERROR] calling giet_pthread_join() for vld[%d]\n", index ); |
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440 | |
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441 | if ( giet_pthread_join( trdid_iqzz[index] , NULL ) ) |
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442 | PRINTF("\n[MJPEG ERROR] calling giet_pthread_join() for iqzz[%d]\n", index ); |
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443 | |
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444 | if ( USE_DCT_COPROC == 0 ) |
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445 | { |
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446 | if ( giet_pthread_join( trdid_idct[index] , NULL ) ) |
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447 | PRINTF("\n[MJPEG ERROR] calling giet_pthread_join() for idct[%d]\n", index ); |
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448 | } |
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449 | |
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450 | if ( giet_pthread_join( trdid_libu[index] , NULL ) ) |
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451 | PRINTF("\n[MJPEG ERROR] calling giet_pthread_join() for libu[%d]\n", index ); |
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452 | |
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453 | if ( USE_DCT_COPROC ) |
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454 | { |
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455 | uint32_t cluster_xy = (x<<4) + y; |
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456 | uint32_t coproc_type = 2; |
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457 | giet_coproc_release( cluster_xy , coproc_type ); |
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458 | } |
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459 | } |
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460 | } |
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461 | |
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462 | ///////////////////////////////////////////////////////////////////////////////////// |
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463 | // makes instrumentation |
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464 | ///////////////////////////////////////////////////////////////////////////////////// |
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465 | |
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466 | // display on TTY |
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467 | PRINTF("\n[MJPEG] Instumentation Results\n" ); |
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468 | for ( image = 0 ; image < MAX_IMAGES ; image++ ) |
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469 | PRINTF(" - Image %d : completed at cycle %d\n", image , date[image]); |
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470 | |
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471 | // save on disk |
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472 | unsigned int fdout = giet_fat_open( "/home/mjpeg_instrumentation" , O_CREAT); |
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473 | if ( fdout < 0 ) |
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474 | PRINTF("\n[MJPEG ERROR] cannot open file /home/mjpeg_instrumentation\n"); |
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475 | |
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476 | int ret = giet_fat_lseek( fdout, 0 , SEEK_END ); |
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477 | if( ret < 0 ) |
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478 | PRINTF("\n[MJPEG ERROR] cannot seek file /home/mjpeg_instrumentation\n"); |
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479 | |
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480 | if( USE_DCT_COPROC ) |
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481 | { |
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482 | giet_fat_fprintf( fdout, "\n*** stream %s / %d clusters / %d cores / DCT COPROC\n", |
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483 | file_pathname , x_size*y_size , nprocs ); |
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484 | } |
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485 | else |
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486 | { |
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487 | giet_fat_fprintf( fdout, "stream %s / %d clusters / %d cores / NO DCT COPROC\n\n", |
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488 | file_pathname , x_size*y_size , nprocs ); |
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489 | } |
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490 | for ( image = 0 ; image < MAX_IMAGES ; image++ ) |
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491 | { |
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492 | giet_fat_fprintf( fdout, " - Image %d : completed at cycle %d\n", |
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493 | image , date[image]); |
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494 | } |
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495 | |
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496 | // completed |
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497 | giet_pthread_exit( "main completed" ); |
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498 | |
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499 | } // end main() |
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500 | |
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