00254 {
00255   if ((cinfo->global_state == DSTATE_SCANNING ||
00256        cinfo->global_state == DSTATE_RAW_OK) && cinfo->buffered_image) {
00257     /* Terminate this pass. */
00258     /* We do not require the whole pass to have been completed. */
00259     (*cinfo->master->finish_output_pass) (cinfo);
00260     cinfo->global_state = DSTATE_BUFPOST;
00261   } else if (cinfo->global_state != DSTATE_BUFPOST) {
00262     /* BUFPOST = repeat call after a suspension, anything else is error */
00263     ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state);
00264   }
00265   /* Read markers looking for SOS or EOI */
00266   while (cinfo->input_scan_number <= cinfo->output_scan_number &&
00267          ! cinfo->inputctl->eoi_reached) {
00268     if ((*cinfo->inputctl->consume_input) (cinfo) == JPEG_SUSPENDED)
00269       return FALSE;             /* Suspend, come back later */
00270   }
00271   cinfo->global_state = DSTATE_BUFIMAGE;
00272   return TRUE;
00273 }

00187 {
00188   JDIMENSION lines_per_iMCU_row;
00189 
00190   if (cinfo->global_state != DSTATE_RAW_OK)
00191     ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state);
00192   if (cinfo->output_scanline >= cinfo->output_height) {
00193     WARNMS(cinfo, JWRN_TOO_MUCH_DATA);
00194     return 0;
00195   }
00196 
00197   /* Call progress monitor hook if present */
00198   if (cinfo->progress != NULL) {
00199     cinfo->progress->pass_counter = (long) cinfo->output_scanline;
00200     cinfo->progress->pass_limit = (long) cinfo->output_height;
00201     (*cinfo->progress->progress_monitor) ((j_common_ptr) cinfo);
00202   }
00203 
00204   /* Verify that at least one iMCU row can be returned. */
00205   lines_per_iMCU_row = cinfo->max_v_samp_factor * cinfo->min_DCT_scaled_size;
00206   if (max_lines < lines_per_iMCU_row)
00207     ERREXIT(cinfo, JERR_BUFFER_SIZE);
00208 
00209   /* Decompress directly into user's buffer. */
00210   if (! (*cinfo->coef->decompress_data) (cinfo, data))
00211     return 0;                   /* suspension forced, can do nothing more */
00212 
00213   /* OK, we processed one iMCU row. */
00214   cinfo->output_scanline += lines_per_iMCU_row;
00215   return lines_per_iMCU_row;
00216 }

00154 {
00155   JDIMENSION row_ctr;
00156 
00157   if (cinfo->global_state != DSTATE_SCANNING)
00158     ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state);
00159   if (cinfo->output_scanline >= cinfo->output_height) {
00160     WARNMS(cinfo, JWRN_TOO_MUCH_DATA);
00161     return 0;
00162   }
00163 
00164   /* Call progress monitor hook if present */
00165   if (cinfo->progress != NULL) {
00166     cinfo->progress->pass_counter = (long) cinfo->output_scanline;
00167     cinfo->progress->pass_limit = (long) cinfo->output_height;
00168     (*cinfo->progress->progress_monitor) ((j_common_ptr) cinfo);
00169   }
00170 
00171   /* Process some data */
00172   row_ctr = 0;
00173   (*cinfo->main->process_data) (cinfo, scanlines, &row_ctr, max_lines);
00174   cinfo->output_scanline += row_ctr;
00175   return row_ctr;
00176 }

00039 {
00040   if (cinfo->global_state == DSTATE_READY) {
00041     /* First call: initialize master control, select active modules */
00042     jinit_master_decompress(cinfo);
00043     if (cinfo->buffered_image) {
00044       /* No more work here; expecting jpeg_start_output next */
00045       cinfo->global_state = DSTATE_BUFIMAGE;
00046       return TRUE;
00047     }
00048     cinfo->global_state = DSTATE_PRELOAD;
00049   }
00050   if (cinfo->global_state == DSTATE_PRELOAD) {
00051     /* If file has multiple scans, absorb them all into the coef buffer */
00052     if (cinfo->inputctl->has_multiple_scans) {
00053 #ifdef D_MULTISCAN_FILES_SUPPORTED
00054       for (;;) {
00055         int retcode;
00056         /* Call progress monitor hook if present */
00057         if (cinfo->progress != NULL)
00058           (*cinfo->progress->progress_monitor) ((j_common_ptr) cinfo);
00059         /* Absorb some more input */
00060         retcode = (*cinfo->inputctl->consume_input) (cinfo);
00061         if (retcode == JPEG_SUSPENDED)
00062           return FALSE;
00063         if (retcode == JPEG_REACHED_EOI)
00064           break;
00065         /* Advance progress counter if appropriate */
00066         if (cinfo->progress != NULL &&
00067             (retcode == JPEG_ROW_COMPLETED || retcode == JPEG_REACHED_SOS)) {
00068           if (++cinfo->progress->pass_counter >= cinfo->progress->pass_limit) {
00069             /* jdmaster underestimated number of scans; ratchet up one scan */
00070             cinfo->progress->pass_limit += (long) cinfo->total_iMCU_rows;
00071           }
00072         }
00073       }
00074 #else
00075       ERREXIT(cinfo, JERR_NOT_COMPILED);
00076 #endif /* D_MULTISCAN_FILES_SUPPORTED */
00077     }
00078     cinfo->output_scan_number = cinfo->input_scan_number;
00079   } else if (cinfo->global_state != DSTATE_PRESCAN)
00080     ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state);
00081   /* Perform any dummy output passes, and set up for the final pass */
00082   return output_pass_setup(cinfo);
00083 }

00229 {
00230   if (cinfo->global_state != DSTATE_BUFIMAGE &&
00231       cinfo->global_state != DSTATE_PRESCAN)
00232     ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state);
00233   /* Limit scan number to valid range */
00234   if (scan_number <= 0)
00235     scan_number = 1;
00236   if (cinfo->inputctl->eoi_reached &&
00237       scan_number > cinfo->input_scan_number)
00238     scan_number = cinfo->input_scan_number;
00239   cinfo->output_scan_number = scan_number;
00240   /* Perform any dummy output passes, and set up for the real pass */
00241   return output_pass_setup(cinfo);
00242 }

00096 {
00097   if (cinfo->global_state != DSTATE_PRESCAN) {
00098     /* First call: do pass setup */
00099     (*cinfo->master->prepare_for_output_pass) (cinfo);
00100     cinfo->output_scanline = 0;
00101     cinfo->global_state = DSTATE_PRESCAN;
00102   }
00103   /* Loop over any required dummy passes */
00104   while (cinfo->master->is_dummy_pass) {
00105 #ifdef QUANT_2PASS_SUPPORTED
00106     /* Crank through the dummy pass */
00107     while (cinfo->output_scanline < cinfo->output_height) {
00108       JDIMENSION last_scanline;
00109       /* Call progress monitor hook if present */
00110       if (cinfo->progress != NULL) {
00111         cinfo->progress->pass_counter = (long) cinfo->output_scanline;
00112         cinfo->progress->pass_limit = (long) cinfo->output_height;
00113         (*cinfo->progress->progress_monitor) ((j_common_ptr) cinfo);
00114       }
00115       /* Process some data */
00116       last_scanline = cinfo->output_scanline;
00117       (*cinfo->main->process_data) (cinfo, (JSAMPARRAY) NULL,
00118                                     &cinfo->output_scanline, (JDIMENSION) 0);
00119       if (cinfo->output_scanline == last_scanline)
00120         return FALSE;           /* No progress made, must suspend */
00121     }
00122     /* Finish up dummy pass, and set up for another one */
00123     (*cinfo->master->finish_output_pass) (cinfo);
00124     (*cinfo->master->prepare_for_output_pass) (cinfo);
00125     cinfo->output_scanline = 0;
00126 #else
00127     ERREXIT(cinfo, JERR_NOT_COMPILED);
00128 #endif /* QUANT_2PASS_SUPPORTED */
00129   }
00130   /* Ready for application to drive output pass through
00131    * jpeg_read_scanlines or jpeg_read_raw_data.
00132    */
00133   cinfo->global_state = cinfo->raw_data_out ? DSTATE_RAW_OK : DSTATE_SCANNING;
00134   return TRUE;
00135 }