11  * This file contains Huffman entropy decoding routines for progressive JPEG.
33  * Expanded entropy decoder object for progressive Huffman decoding.
82   phuff_entropy_ptr entropy = (phuff_entropy_ptr)cinfo->entropy;  in start_pass_phuff_decoder()  local
147       entropy->pub.decode_mcu = decode_mcu_DC_first;  in start_pass_phuff_decoder()
149       entropy->pub.decode_mcu = decode_mcu_AC_first;  in start_pass_phuff_decoder()
152       entropy->pub.decode_mcu = decode_mcu_DC_refine;  in start_pass_phuff_decoder()
154       entropy->pub.decode_mcu = decode_mcu_AC_refine;  in start_pass_phuff_decoder()
165         pdtbl = (d_derived_tbl **)(entropy->derived_tbls) + tbl;  in start_pass_phuff_decoder()
170       pdtbl = (d_derived_tbl **)(entropy->derived_tbls) + tbl;  in start_pass_phuff_decoder()
173       entropy->ac_derived_tbl = entropy->derived_tbls[tbl];  in start_pass_phuff_decoder()
176     entropy->saved.last_dc_val[ci] = 0;  in start_pass_phuff_decoder()
180   entropy->bitstate.bits_left = 0;  in start_pass_phuff_decoder()
181   entropy->bitstate.get_buffer = 0; /* unnecessary, but keeps Purify quiet */  in start_pass_phuff_decoder()
182   entropy->pub.insufficient_data = FALSE;  in start_pass_phuff_decoder()
185   entropy->saved.EOBRUN = 0;  in start_pass_phuff_decoder()
188   entropy->restarts_to_go = cinfo->restart_interval;  in start_pass_phuff_decoder()
232   phuff_entropy_ptr entropy = (phuff_entropy_ptr)cinfo->entropy;  in process_restart()  local
237   cinfo->marker->discarded_bytes += entropy->bitstate.bits_left / 8;  in process_restart()
238   entropy->bitstate.bits_left = 0;  in process_restart()
246     entropy->saved.last_dc_val[ci] = 0;  in process_restart()
248   entropy->saved.EOBRUN = 0;  in process_restart()
251   entropy->restarts_to_go = cinfo->restart_interval;  in process_restart()
259     entropy->pub.insufficient_data = FALSE;  in process_restart()
290   phuff_entropy_ptr entropy = (phuff_entropy_ptr)cinfo->entropy;  in decode_mcu_DC_first()  local
302     if (entropy->restarts_to_go == 0)  in decode_mcu_DC_first()
310   if (!entropy->pub.insufficient_data) {  in decode_mcu_DC_first()
313     BITREAD_LOAD_STATE(cinfo, entropy->bitstate);  in decode_mcu_DC_first()
314     state = entropy->saved;  in decode_mcu_DC_first()
322       tbl = entropy->derived_tbls[compptr->dc_tbl_no];  in decode_mcu_DC_first()
346     BITREAD_SAVE_STATE(cinfo, entropy->bitstate);  in decode_mcu_DC_first()
347     entropy->saved = state;  in decode_mcu_DC_first()
352     entropy->restarts_to_go--;  in decode_mcu_DC_first()
366   phuff_entropy_ptr entropy = (phuff_entropy_ptr)cinfo->entropy;  in decode_mcu_AC_first()  local
377     if (entropy->restarts_to_go == 0)  in decode_mcu_AC_first()
385   if (!entropy->pub.insufficient_data) {  in decode_mcu_AC_first()
390     EOBRUN = entropy->saved.EOBRUN;     /* only part of saved state we need */  in decode_mcu_AC_first()
397       BITREAD_LOAD_STATE(cinfo, entropy->bitstate);  in decode_mcu_AC_first()
399       tbl = entropy->ac_derived_tbl;  in decode_mcu_AC_first()
428       BITREAD_SAVE_STATE(cinfo, entropy->bitstate);  in decode_mcu_AC_first()
432     entropy->saved.EOBRUN = EOBRUN;     /* only part of saved state we need */  in decode_mcu_AC_first()
437     entropy->restarts_to_go--;  in decode_mcu_AC_first()
452   phuff_entropy_ptr entropy = (phuff_entropy_ptr)cinfo->entropy;  in decode_mcu_DC_refine()  local
460     if (entropy->restarts_to_go == 0)  in decode_mcu_DC_refine()
470   BITREAD_LOAD_STATE(cinfo, entropy->bitstate);  in decode_mcu_DC_refine()
485   BITREAD_SAVE_STATE(cinfo, entropy->bitstate);  in decode_mcu_DC_refine()
489     entropy->restarts_to_go--;  in decode_mcu_DC_refine()
502   phuff_entropy_ptr entropy = (phuff_entropy_ptr)cinfo->entropy;  in decode_mcu_AC_refine()  local
517     if (entropy->restarts_to_go == 0)  in decode_mcu_AC_refine()
524   if (!entropy->pub.insufficient_data) {  in decode_mcu_AC_refine()
527     BITREAD_LOAD_STATE(cinfo, entropy->bitstate);  in decode_mcu_AC_refine()
528     EOBRUN = entropy->saved.EOBRUN; /* only part of saved state we need */  in decode_mcu_AC_refine()
532     tbl = entropy->ac_derived_tbl;  in decode_mcu_AC_refine()
627     BITREAD_SAVE_STATE(cinfo, entropy->bitstate);  in decode_mcu_AC_refine()
628     entropy->saved.EOBRUN = EOBRUN; /* only part of saved state we need */  in decode_mcu_AC_refine()
633     entropy->restarts_to_go--;  in decode_mcu_AC_refine()
647  * Module initialization routine for progressive Huffman entropy decoding.
653   phuff_entropy_ptr entropy;  in jinit_phuff_decoder()  local
657   entropy = (phuff_entropy_ptr)  in jinit_phuff_decoder()
660   cinfo->entropy = (struct jpeg_entropy_decoder *)entropy;  in jinit_phuff_decoder()
661   entropy->pub.start_pass = start_pass_phuff_decoder;  in jinit_phuff_decoder()
665     entropy->derived_tbls[i] = NULL;  in jinit_phuff_decoder()