cd_file.c 8.0 KB

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  1. /***********************************************************
  2. * *
  3. * This source was taken from the Gens project *
  4. * Written by Stéphane Dallongeville *
  5. * Copyright (c) 2002 by Stéphane Dallongeville *
  6. * Modified/adapted for PicoDrive by notaz, 2007 *
  7. * *
  8. ***********************************************************/
  9. #include <sys/stat.h>
  10. #include "../PicoInt.h"
  11. #include "cd_file.h"
  12. #define cdprintf dprintf
  13. //#define cdprintf(x...)
  14. #define DEBUG_CD
  15. PICO_INTERNAL int Load_ISO(const char *iso_name, int is_bin)
  16. {
  17. int i, j, num_track, Cur_LBA, index, ret, iso_name_len;
  18. _scd_track *Tracks = Pico_mcd->TOC.Tracks;
  19. char tmp_name[1024], tmp_ext[10];
  20. pm_file *pmf;
  21. static char *exts[] = {
  22. "%02d.mp3", " %02d.mp3", "-%02d.mp3", "_%02d.mp3", " - %02d.mp3",
  23. "%d.mp3", " %d.mp3", "-%d.mp3", "_%d.mp3", " - %d.mp3",
  24. "%02d.MP3", " %02d.MP3", "-%02d.MP3", "_%02d.MP3", " - %02d.MP3",
  25. /* "%02d.wav", " %02d.wav", "-%02d.wav", "_%02d.wav", " - %02d.wav",
  26. "%d.wav", " %d.wav", "-%d.wav", "_%d.wav", " - %2d.wav" */
  27. };
  28. Unload_ISO();
  29. Tracks[0].ftype = is_bin ? TYPE_BIN : TYPE_ISO;
  30. Tracks[0].F = pmf = pm_open(iso_name);
  31. if (Tracks[0].F == NULL)
  32. {
  33. Tracks[0].ftype = 0;
  34. Tracks[0].Length = 0;
  35. return -1;
  36. }
  37. if (Tracks[0].ftype == TYPE_ISO)
  38. Tracks[0].Length = pmf->size >>= 11; // size in sectors
  39. else Tracks[0].Length = pmf->size /= 2352;
  40. Tracks[0].MSF.M = 0; // minutes
  41. Tracks[0].MSF.S = 2; // seconds
  42. Tracks[0].MSF.F = 0; // frames
  43. cdprintf("Track 0 - %02d:%02d:%02d DATA", Tracks[0].MSF.M, Tracks[0].MSF.S, Tracks[0].MSF.F);
  44. Cur_LBA = Tracks[0].Length; // Size in sectors
  45. iso_name_len = strlen(iso_name);
  46. for (num_track = 2, i = 0; i < 100; i++)
  47. {
  48. for(j = 0; j < sizeof(exts)/sizeof(char *); j++)
  49. {
  50. int ext_len;
  51. FILE *tmp_file;
  52. sprintf(tmp_ext, exts[j], i);
  53. ext_len = strlen(tmp_ext);
  54. memcpy(tmp_name, iso_name, iso_name_len + 1);
  55. tmp_name[iso_name_len - 4] = 0;
  56. strcat(tmp_name, tmp_ext);
  57. tmp_file = fopen(tmp_name, "rb");
  58. if (!tmp_file && i > 1 && iso_name_len > ext_len) {
  59. tmp_name[iso_name_len - ext_len] = 0;
  60. strcat(tmp_name, tmp_ext);
  61. tmp_file = fopen(tmp_name, "rb");
  62. }
  63. if (tmp_file)
  64. {
  65. int fs;
  66. struct stat file_stat;
  67. index = num_track - 1;
  68. ret = stat(tmp_name, &file_stat);
  69. fs = file_stat.st_size; // used to calculate lenght
  70. Tracks[index].KBtps = (short) mp3_get_bitrate(tmp_file, fs);
  71. Tracks[index].KBtps >>= 3;
  72. if (ret != 0 || Tracks[index].KBtps <= 0)
  73. {
  74. cdprintf("Error track %i: stat %i, rate %i", index, ret, Tracks[index].KBtps);
  75. fclose(tmp_file);
  76. continue;
  77. }
  78. Tracks[index].F = tmp_file;
  79. LBA_to_MSF(Cur_LBA, &Tracks[index].MSF);
  80. // MP3 File
  81. Tracks[index].ftype = TYPE_MP3;
  82. fs *= 75;
  83. fs /= Tracks[index].KBtps * 1000;
  84. Tracks[index].Length = fs;
  85. Cur_LBA += Tracks[index].Length;
  86. cdprintf("Track %i: %s - %02d:%02d:%02d len=%i AUDIO", index, tmp_name, Tracks[index].MSF.M,
  87. Tracks[index].MSF.S, Tracks[index].MSF.F, fs);
  88. num_track++;
  89. break;
  90. }
  91. }
  92. }
  93. Pico_mcd->TOC.Last_Track = num_track - 1;
  94. index = num_track - 1;
  95. LBA_to_MSF(Cur_LBA, &Tracks[index].MSF);
  96. cdprintf("End CD - %02d:%02d:%02d\n\n", Tracks[index].MSF.M,
  97. Tracks[index].MSF.S, Tracks[index].MSF.F);
  98. return 0;
  99. }
  100. PICO_INTERNAL void Unload_ISO(void)
  101. {
  102. int i;
  103. if (Pico_mcd == NULL) return;
  104. if (Pico_mcd->TOC.Tracks[0].F) pm_close(Pico_mcd->TOC.Tracks[0].F);
  105. for(i = 1; i < 100; i++)
  106. {
  107. if (Pico_mcd->TOC.Tracks[i].F) fclose(Pico_mcd->TOC.Tracks[i].F);
  108. }
  109. memset(Pico_mcd->TOC.Tracks, 0, sizeof(Pico_mcd->TOC.Tracks));
  110. }
  111. PICO_INTERNAL int FILE_Read_One_LBA_CDC(void)
  112. {
  113. // static char cp_buf[2560];
  114. if (Pico_mcd->s68k_regs[0x36] & 1) // DATA
  115. {
  116. if (Pico_mcd->TOC.Tracks[0].F == NULL) return -1;
  117. // moved below..
  118. //fseek(Pico_mcd->TOC.Tracks[0].F, where_read, SEEK_SET);
  119. //fread(cp_buf, 1, 2048, Pico_mcd->TOC.Tracks[0].F);
  120. cdprintf("Read file CDC 1 data sector :\n");
  121. }
  122. else // AUDIO
  123. {
  124. // int rate, channel;
  125. // if (Pico_mcd->TOC.Tracks[Pico_mcd->scd.Cur_Track - 1].ftype == TYPE_MP3)
  126. {
  127. // TODO
  128. // MP3_Update(cp_buf, &rate, &channel, 0);
  129. // Write_CD_Audio((short *) cp_buf, rate, channel, 588);
  130. }
  131. cdprintf("Read file CDC 1 audio sector :\n");
  132. }
  133. // Update CDC stuff
  134. CDC_Update_Header();
  135. if (Pico_mcd->s68k_regs[0x36] & 1) // DATA track
  136. {
  137. if (Pico_mcd->cdc.CTRL.B.B0 & 0x80) // DECEN = decoding enable
  138. {
  139. if (Pico_mcd->cdc.CTRL.B.B0 & 0x04) // WRRQ : this bit enable write to buffer
  140. {
  141. int where_read = 0;
  142. // CAUTION : lookahead bit not implemented
  143. if (Pico_mcd->scd.Cur_LBA < 0)
  144. where_read = 0;
  145. else if (Pico_mcd->scd.Cur_LBA >= Pico_mcd->TOC.Tracks[0].Length)
  146. where_read = Pico_mcd->TOC.Tracks[0].Length - 1;
  147. else where_read = Pico_mcd->scd.Cur_LBA;
  148. Pico_mcd->scd.Cur_LBA++;
  149. Pico_mcd->cdc.WA.N = (Pico_mcd->cdc.WA.N + 2352) & 0x7FFF; // add one sector to WA
  150. Pico_mcd->cdc.PT.N = (Pico_mcd->cdc.PT.N + 2352) & 0x7FFF;
  151. *(unsigned int *)(Pico_mcd->cdc.Buffer + Pico_mcd->cdc.PT.N) = Pico_mcd->cdc.HEAD.N;
  152. //memcpy(&Pico_mcd->cdc.Buffer[Pico_mcd->cdc.PT.N + 4], cp_buf, 2048);
  153. //pm_seek(Pico_mcd->TOC.Tracks[0].F, where_read, SEEK_SET);
  154. //pm_read(Pico_mcd->cdc.Buffer + Pico_mcd->cdc.PT.N + 4, 2048, Pico_mcd->TOC.Tracks[0].F);
  155. PicoCDBufferRead(Pico_mcd->cdc.Buffer + Pico_mcd->cdc.PT.N + 4, where_read);
  156. #ifdef DEBUG_CD
  157. cdprintf("Read -> WA = %d Buffer[%d] =", Pico_mcd->cdc.WA.N, Pico_mcd->cdc.PT.N & 0x3FFF);
  158. cdprintf("Header 1 = %.2X %.2X %.2X %.2X", Pico_mcd->cdc.HEAD.B.B0,
  159. Pico_mcd->cdc.HEAD.B.B1, Pico_mcd->cdc.HEAD.B.B2, Pico_mcd->cdc.HEAD.B.B3);
  160. cdprintf("Header 2 = %.2X %.2X %.2X %.2X --- %.2X %.2X\n\n",
  161. Pico_mcd->cdc.Buffer[(Pico_mcd->cdc.PT.N + 0) & 0x3FFF],
  162. Pico_mcd->cdc.Buffer[(Pico_mcd->cdc.PT.N + 1) & 0x3FFF],
  163. Pico_mcd->cdc.Buffer[(Pico_mcd->cdc.PT.N + 2) & 0x3FFF],
  164. Pico_mcd->cdc.Buffer[(Pico_mcd->cdc.PT.N + 3) & 0x3FFF],
  165. Pico_mcd->cdc.Buffer[(Pico_mcd->cdc.PT.N + 4) & 0x3FFF],
  166. Pico_mcd->cdc.Buffer[(Pico_mcd->cdc.PT.N + 5) & 0x3FFF]);
  167. #endif
  168. }
  169. }
  170. }
  171. else // music track
  172. {
  173. Pico_mcd->scd.Cur_LBA++;
  174. Pico_mcd->cdc.WA.N = (Pico_mcd->cdc.WA.N + 2352) & 0x7FFF; // add one sector to WA
  175. Pico_mcd->cdc.PT.N = (Pico_mcd->cdc.PT.N + 2352) & 0x7FFF;
  176. if (Pico_mcd->cdc.CTRL.B.B0 & 0x80) // DECEN = decoding enable
  177. {
  178. if (Pico_mcd->cdc.CTRL.B.B0 & 0x04) // WRRQ : this bit enable write to buffer
  179. {
  180. // CAUTION : lookahead bit not implemented
  181. //memcpy(&Pico_mcd->cdc.Buffer[Pico_mcd->cdc.PT.N], cp_buf, 2352);
  182. }
  183. }
  184. }
  185. if (Pico_mcd->cdc.CTRL.B.B0 & 0x80) // DECEN = decoding enable
  186. {
  187. Pico_mcd->cdc.STAT.B.B0 = 0x80;
  188. if (Pico_mcd->cdc.CTRL.B.B0 & 0x10) // determine form bit form sub header ?
  189. {
  190. Pico_mcd->cdc.STAT.B.B2 = Pico_mcd->cdc.CTRL.B.B1 & 0x08;
  191. }
  192. else
  193. {
  194. Pico_mcd->cdc.STAT.B.B2 = Pico_mcd->cdc.CTRL.B.B1 & 0x0C;
  195. }
  196. if (Pico_mcd->cdc.CTRL.B.B0 & 0x02) Pico_mcd->cdc.STAT.B.B3 = 0x20; // ECC done
  197. else Pico_mcd->cdc.STAT.B.B3 = 0x00; // ECC not done
  198. if (Pico_mcd->cdc.IFCTRL & 0x20)
  199. {
  200. if (Pico_mcd->s68k_regs[0x33] & (1<<5))
  201. {
  202. dprintf("cdc dec irq 5");
  203. SekInterruptS68k(5);
  204. }
  205. Pico_mcd->cdc.IFSTAT &= ~0x20; // DEC interrupt happen
  206. Pico_mcd->cdc.Decode_Reg_Read = 0; // Reset read after DEC int
  207. }
  208. }
  209. return 0;
  210. }
  211. PICO_INTERNAL int FILE_Play_CD_LBA(void)
  212. {
  213. int index = Pico_mcd->scd.Cur_Track - 1;
  214. Pico_mcd->m.audio_track = index;
  215. cdprintf("Play track #%i", Pico_mcd->scd.Cur_Track);
  216. if (Pico_mcd->TOC.Tracks[index].F == NULL)
  217. {
  218. return 1;
  219. }
  220. if (Pico_mcd->TOC.Tracks[index].ftype == TYPE_MP3)
  221. {
  222. int pos1024 = 0;
  223. int Track_LBA_Pos = Pico_mcd->scd.Cur_LBA - Track_to_LBA(Pico_mcd->scd.Cur_Track);
  224. if (Track_LBA_Pos < 0) Track_LBA_Pos = 0;
  225. if (Track_LBA_Pos)
  226. pos1024 = Track_LBA_Pos * 1024 / Pico_mcd->TOC.Tracks[index].Length;
  227. mp3_start_play(Pico_mcd->TOC.Tracks[index].F, pos1024);
  228. }
  229. else
  230. {
  231. return 3;
  232. }
  233. return 0;
  234. }