consume_data_multi_scan(j_decompress_ptr cinfo) {
huffman_index *index = cinfo->entropy->index;
int i, retcode, ci;
int mcu = cinfo->input_iMCU_row;
jinit_phuff_decoder(cinfo);
for (i = 0; i < index->scan_count; i++) {
(*cinfo->inputctl->finish_input_pass)(cinfo);
jset_input_stream_position(cinfo, index->scan[i].bitstream_offset);
cinfo->output_iMCU_row = mcu;
cinfo->unread_marker = 0;
// Consume SOS and DHT headers
retcode = (*cinfo->inputctl->consume_markers)(cinfo, index, i);
cinfo->input_iMCU_row = mcu;
cinfo->input_scan_number = i;
cinfo->entropy->index = index;
// Consume scan block data
consume_data(cinfo);
}
cinfo->input_iMCU_row = mcu + 1;
cinfo->input_scan_number = 0;
cinfo->output_scan_number = 0;
return JPEG_ROW_COMPLETED;
}
jpeg_build_huffman_index_progressive(j_decompress_ptr cinfo,
huffman_index *index)
{
if (cinfo->global_state == DSTATE_READY) {
JPEG_TRACE("Progressive Mode\n");
/* First call: initialize active modules */
transdecode_master_selection(cinfo);
cinfo->global_state = DSTATE_RDCOEFS;
}
if (cinfo->global_state == DSTATE_RDCOEFS) {
int mcu, i;
cinfo->marker->get_sos_marker_position(cinfo, index);
/* Absorb whole file into the coef buffer */
for (mcu = 0; (unsigned int)mcu < cinfo->total_iMCU_rows; mcu++) {
int retcode = 0;
/* Call progress monitor hook if present */
if (cinfo->progress != NULL)
(*cinfo->progress->progress_monitor) ((j_common_ptr) cinfo);
/* Absorb some more input */
jinit_phuff_decoder(cinfo);
for (i = 0; i < index->scan_count; i++) {
(*cinfo->inputctl->finish_input_pass) (cinfo);
jset_input_stream_position(cinfo, index->scan[i].bitstream_offset);
cinfo->unread_marker = 0;
retcode = (*cinfo->inputctl->consume_input_build_huffman_index)
(cinfo, index, i);
if (retcode == JPEG_REACHED_EOI)
break;
cinfo->input_iMCU_row = mcu;
if (mcu != 0)
(*cinfo->entropy->configure_huffman_decoder)
(cinfo, index->scan[i].prev_MCU_offset);
cinfo->input_scan_number = i;
retcode = (*cinfo->inputctl->consume_input_build_huffman_index)
(cinfo, index, i);
}
if (retcode == JPEG_SUSPENDED)
return FALSE;
if (retcode == JPEG_REACHED_EOI)
break;
/* Advance progress counter if appropriate */
if (cinfo->progress != NULL &&
(retcode == JPEG_ROW_COMPLETED || retcode == JPEG_REACHED_SOS)) {
if (++cinfo->progress->pass_counter >= cinfo->progress->pass_limit) {
/* startup underestimated number of scans; ratchet up one scan */
cinfo->progress->pass_limit += (long) cinfo->total_iMCU_rows;
}
}
}
cinfo->global_state = DSTATE_STOPPING;
}
/* At this point we should be in state DSTATE_STOPPING if being used
* standalone, or in state DSTATE_BUFIMAGE if being invoked to get access
* to the coefficients during a full buffered-image-mode decompression.
*/
if ((cinfo->global_state == DSTATE_STOPPING ||
cinfo->global_state == DSTATE_BUFIMAGE) && cinfo->buffered_image) {
return TRUE;
}
/* Oops, improper usage */
ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state);
return FALSE; /* keep compiler happy */
}