123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350351352353354355356357358359360361362363364365366367368369370371372373374375376377378379380381382383384385386387388389390391392393394395396397398399400401402403404405406407408409410411412413414415416417418419420421422423424425426427428429430431432433434435436437438439440441442443444445446447448449450451452453454455456457458459460461462463464465466467468469470471472473474475476477478479480481482483484485486487488489490491492493494495496497498499500501502503504505506507508509510511512513514515516517518519520521522523524525526527528529530531532533534535536537538539540541542543544545546547548549550551552553554555556557558559560561562563564565566567568569570571572573574575576577578579580581582583584585586587588589590591592593594595596597598599600601602603604605606607608609610611612613614615616617618619620621622623624625626627628629630631632633634635636637638639640641642643644645646647648649650651652653654655656657658659660661662663664665666667668669670671672673674675676677678679680681682683684685686687688689690691692693694695696697698699700701702703704705706707708709710711712713714715716717718719720721722723724725726727728729730731732733734735736737738739740741742743744745746747748749750751752753754755756757758759760761762763764765766767768769770771772773774775776777778779780781782783784785786787788789790791792793794795796797798799800801802803804805806807808809810811812813814815816817818819820821822823824825826827828829830831832833834835836837838839840841842843844845846847848849850851852853854855856857858859860861862863864865866867868869870871872873874875876877878879880881882883884885886887888889890891892893894895896897898899900901902903904905906907908909910911912913914915916917918919920921922923924925926927928929930931932933934935936937938939940941942943944945946947948949950951952953954955956957958959960961962963964965966967968969970971972973974975976977978979980981982983984985986987988989990991992993994995996997998999100010011002100310041005100610071008100910101011101210131014101510161017101810191020102110221023102410251026102710281029103010311032103310341035103610371038103910401041104210431044104510461047104810491050105110521053105410551056105710581059106010611062106310641065106610671068106910701071107210731074107510761077107810791080108110821083108410851086108710881089109010911092109310941095109610971098109911001101110211031104110511061107110811091110111111121113111411151116111711181119112011211122112311241125112611271128112911301131113211331134113511361137113811391140114111421143114411451146114711481149115011511152115311541155115611571158115911601161116211631164116511661167116811691170117111721173117411751176117711781179 |
- #define JPEG_INTERNALS
- #define AM_MEMORY_MANAGER
- #include "jinclude.h"
- #include "jpeglib.h"
- #include "jmemsys.h"
- #if !defined(_MSC_VER) || _MSC_VER > 1600
- #include <stdint.h>
- #endif
- #include <limits.h>
- #ifndef NO_GETENV
- #ifndef HAVE_STDLIB_H
- extern char *getenv(const char *name);
- #endif
- #endif
- LOCAL(size_t)
- round_up_pow2(size_t a, size_t b)
- {
- return ((a + b - 1) & (~(b - 1)));
- }
- #ifndef ALIGN_SIZE
- #ifndef WITH_SIMD
- #define ALIGN_SIZE sizeof(double)
- #else
- #define ALIGN_SIZE 32
- #endif
- #endif
- typedef struct small_pool_struct *small_pool_ptr;
- typedef struct small_pool_struct {
- small_pool_ptr next;
- size_t bytes_used;
- size_t bytes_left;
- } small_pool_hdr;
- typedef struct large_pool_struct *large_pool_ptr;
- typedef struct large_pool_struct {
- large_pool_ptr next;
- size_t bytes_used;
- size_t bytes_left;
- } large_pool_hdr;
- typedef struct {
- struct jpeg_memory_mgr pub;
-
- small_pool_ptr small_list[JPOOL_NUMPOOLS];
- large_pool_ptr large_list[JPOOL_NUMPOOLS];
-
- jvirt_sarray_ptr virt_sarray_list;
- jvirt_barray_ptr virt_barray_list;
-
- size_t total_space_allocated;
-
- JDIMENSION last_rowsperchunk;
- } my_memory_mgr;
- typedef my_memory_mgr *my_mem_ptr;
- struct jvirt_sarray_control {
- JSAMPARRAY mem_buffer;
- JDIMENSION rows_in_array;
- JDIMENSION samplesperrow;
- JDIMENSION maxaccess;
- JDIMENSION rows_in_mem;
- JDIMENSION rowsperchunk;
- JDIMENSION cur_start_row;
- JDIMENSION first_undef_row;
- boolean pre_zero;
- boolean dirty;
- boolean b_s_open;
- jvirt_sarray_ptr next;
- backing_store_info b_s_info;
- };
- struct jvirt_barray_control {
- JBLOCKARRAY mem_buffer;
- JDIMENSION rows_in_array;
- JDIMENSION blocksperrow;
- JDIMENSION maxaccess;
- JDIMENSION rows_in_mem;
- JDIMENSION rowsperchunk;
- JDIMENSION cur_start_row;
- JDIMENSION first_undef_row;
- boolean pre_zero;
- boolean dirty;
- boolean b_s_open;
- jvirt_barray_ptr next;
- backing_store_info b_s_info;
- };
- #ifdef MEM_STATS
- LOCAL(void)
- print_mem_stats(j_common_ptr cinfo, int pool_id)
- {
- my_mem_ptr mem = (my_mem_ptr)cinfo->mem;
- small_pool_ptr shdr_ptr;
- large_pool_ptr lhdr_ptr;
-
- fprintf(stderr, "Freeing pool %d, total space = %ld\n",
- pool_id, mem->total_space_allocated);
- for (lhdr_ptr = mem->large_list[pool_id]; lhdr_ptr != NULL;
- lhdr_ptr = lhdr_ptr->next) {
- fprintf(stderr, " Large chunk used %ld\n", (long)lhdr_ptr->bytes_used);
- }
- for (shdr_ptr = mem->small_list[pool_id]; shdr_ptr != NULL;
- shdr_ptr = shdr_ptr->next) {
- fprintf(stderr, " Small chunk used %ld free %ld\n",
- (long)shdr_ptr->bytes_used, (long)shdr_ptr->bytes_left);
- }
- }
- #endif
- LOCAL(void)
- out_of_memory(j_common_ptr cinfo, int which)
- {
- #ifdef MEM_STATS
- cinfo->err->trace_level = 2;
- #endif
- ERREXIT1(cinfo, JERR_OUT_OF_MEMORY, which);
- }
- static const size_t first_pool_slop[JPOOL_NUMPOOLS] = {
- 1600,
- 16000
- };
- static const size_t extra_pool_slop[JPOOL_NUMPOOLS] = {
- 0,
- 5000
- };
- #define MIN_SLOP 50
- METHODDEF(void *)
- alloc_small(j_common_ptr cinfo, int pool_id, size_t sizeofobject)
- {
- my_mem_ptr mem = (my_mem_ptr)cinfo->mem;
- small_pool_ptr hdr_ptr, prev_hdr_ptr;
- char *data_ptr;
- size_t min_request, slop;
-
- if (sizeofobject > MAX_ALLOC_CHUNK) {
-
- out_of_memory(cinfo, 7);
- }
- sizeofobject = round_up_pow2(sizeofobject, ALIGN_SIZE);
-
- if ((sizeof(small_pool_hdr) + sizeofobject + ALIGN_SIZE - 1) >
- MAX_ALLOC_CHUNK)
- out_of_memory(cinfo, 1);
-
- if (pool_id < 0 || pool_id >= JPOOL_NUMPOOLS)
- ERREXIT1(cinfo, JERR_BAD_POOL_ID, pool_id);
- prev_hdr_ptr = NULL;
- hdr_ptr = mem->small_list[pool_id];
- while (hdr_ptr != NULL) {
- if (hdr_ptr->bytes_left >= sizeofobject)
- break;
- prev_hdr_ptr = hdr_ptr;
- hdr_ptr = hdr_ptr->next;
- }
-
- if (hdr_ptr == NULL) {
-
- min_request = sizeof(small_pool_hdr) + sizeofobject + ALIGN_SIZE - 1;
- if (prev_hdr_ptr == NULL)
- slop = first_pool_slop[pool_id];
- else
- slop = extra_pool_slop[pool_id];
-
- if (slop > (size_t)(MAX_ALLOC_CHUNK - min_request))
- slop = (size_t)(MAX_ALLOC_CHUNK - min_request);
-
- for (;;) {
- hdr_ptr = (small_pool_ptr)jpeg_get_small(cinfo, min_request + slop);
- if (hdr_ptr != NULL)
- break;
- slop /= 2;
- if (slop < MIN_SLOP)
- out_of_memory(cinfo, 2);
- }
- mem->total_space_allocated += min_request + slop;
-
- hdr_ptr->next = NULL;
- hdr_ptr->bytes_used = 0;
- hdr_ptr->bytes_left = sizeofobject + slop;
- if (prev_hdr_ptr == NULL)
- mem->small_list[pool_id] = hdr_ptr;
- else
- prev_hdr_ptr->next = hdr_ptr;
- }
-
- data_ptr = (char *)hdr_ptr;
- data_ptr += sizeof(small_pool_hdr);
- if ((size_t)data_ptr % ALIGN_SIZE)
- data_ptr += ALIGN_SIZE - (size_t)data_ptr % ALIGN_SIZE;
- data_ptr += hdr_ptr->bytes_used;
- hdr_ptr->bytes_used += sizeofobject;
- hdr_ptr->bytes_left -= sizeofobject;
- return (void *)data_ptr;
- }
- METHODDEF(void *)
- alloc_large(j_common_ptr cinfo, int pool_id, size_t sizeofobject)
- {
- my_mem_ptr mem = (my_mem_ptr)cinfo->mem;
- large_pool_ptr hdr_ptr;
- char *data_ptr;
-
- if (sizeofobject > MAX_ALLOC_CHUNK) {
-
- out_of_memory(cinfo, 8);
- }
- sizeofobject = round_up_pow2(sizeofobject, ALIGN_SIZE);
-
- if ((sizeof(large_pool_hdr) + sizeofobject + ALIGN_SIZE - 1) >
- MAX_ALLOC_CHUNK)
- out_of_memory(cinfo, 3);
-
- if (pool_id < 0 || pool_id >= JPOOL_NUMPOOLS)
- ERREXIT1(cinfo, JERR_BAD_POOL_ID, pool_id);
- hdr_ptr = (large_pool_ptr)jpeg_get_large(cinfo, sizeofobject +
- sizeof(large_pool_hdr) +
- ALIGN_SIZE - 1);
- if (hdr_ptr == NULL)
- out_of_memory(cinfo, 4);
- mem->total_space_allocated += sizeofobject + sizeof(large_pool_hdr) +
- ALIGN_SIZE - 1;
-
- hdr_ptr->next = mem->large_list[pool_id];
-
- hdr_ptr->bytes_used = sizeofobject;
- hdr_ptr->bytes_left = 0;
- mem->large_list[pool_id] = hdr_ptr;
- data_ptr = (char *)hdr_ptr;
- data_ptr += sizeof(small_pool_hdr);
- if ((size_t)data_ptr % ALIGN_SIZE)
- data_ptr += ALIGN_SIZE - (size_t)data_ptr % ALIGN_SIZE;
- return (void *)data_ptr;
- }
- METHODDEF(JSAMPARRAY)
- alloc_sarray(j_common_ptr cinfo, int pool_id, JDIMENSION samplesperrow,
- JDIMENSION numrows)
- {
- my_mem_ptr mem = (my_mem_ptr)cinfo->mem;
- JSAMPARRAY result;
- JSAMPROW workspace;
- JDIMENSION rowsperchunk, currow, i;
- long ltemp;
-
- if ((ALIGN_SIZE % sizeof(JSAMPLE)) != 0)
- out_of_memory(cinfo, 5);
- if (samplesperrow > MAX_ALLOC_CHUNK) {
-
- out_of_memory(cinfo, 9);
- }
- samplesperrow = (JDIMENSION)round_up_pow2(samplesperrow, (2 * ALIGN_SIZE) /
- sizeof(JSAMPLE));
-
- ltemp = (MAX_ALLOC_CHUNK - sizeof(large_pool_hdr)) /
- ((long)samplesperrow * sizeof(JSAMPLE));
- if (ltemp <= 0)
- ERREXIT(cinfo, JERR_WIDTH_OVERFLOW);
- if (ltemp < (long)numrows)
- rowsperchunk = (JDIMENSION)ltemp;
- else
- rowsperchunk = numrows;
- mem->last_rowsperchunk = rowsperchunk;
-
- result = (JSAMPARRAY)alloc_small(cinfo, pool_id,
- (size_t)(numrows * sizeof(JSAMPROW)));
-
- currow = 0;
- while (currow < numrows) {
- rowsperchunk = MIN(rowsperchunk, numrows - currow);
- workspace = (JSAMPROW)alloc_large(cinfo, pool_id,
- (size_t)((size_t)rowsperchunk * (size_t)samplesperrow *
- sizeof(JSAMPLE)));
- for (i = rowsperchunk; i > 0; i--) {
- result[currow++] = workspace;
- workspace += samplesperrow;
- }
- }
- return result;
- }
- METHODDEF(JBLOCKARRAY)
- alloc_barray(j_common_ptr cinfo, int pool_id, JDIMENSION blocksperrow,
- JDIMENSION numrows)
- {
- my_mem_ptr mem = (my_mem_ptr)cinfo->mem;
- JBLOCKARRAY result;
- JBLOCKROW workspace;
- JDIMENSION rowsperchunk, currow, i;
- long ltemp;
-
- if ((sizeof(JBLOCK) % ALIGN_SIZE) != 0)
- out_of_memory(cinfo, 6);
-
- ltemp = (MAX_ALLOC_CHUNK - sizeof(large_pool_hdr)) /
- ((long)blocksperrow * sizeof(JBLOCK));
- if (ltemp <= 0)
- ERREXIT(cinfo, JERR_WIDTH_OVERFLOW);
- if (ltemp < (long)numrows)
- rowsperchunk = (JDIMENSION)ltemp;
- else
- rowsperchunk = numrows;
- mem->last_rowsperchunk = rowsperchunk;
-
- result = (JBLOCKARRAY)alloc_small(cinfo, pool_id,
- (size_t)(numrows * sizeof(JBLOCKROW)));
-
- currow = 0;
- while (currow < numrows) {
- rowsperchunk = MIN(rowsperchunk, numrows - currow);
- workspace = (JBLOCKROW)alloc_large(cinfo, pool_id,
- (size_t)((size_t)rowsperchunk * (size_t)blocksperrow *
- sizeof(JBLOCK)));
- for (i = rowsperchunk; i > 0; i--) {
- result[currow++] = workspace;
- workspace += blocksperrow;
- }
- }
- return result;
- }
- METHODDEF(jvirt_sarray_ptr)
- request_virt_sarray(j_common_ptr cinfo, int pool_id, boolean pre_zero,
- JDIMENSION samplesperrow, JDIMENSION numrows,
- JDIMENSION maxaccess)
- {
- my_mem_ptr mem = (my_mem_ptr)cinfo->mem;
- jvirt_sarray_ptr result;
-
- if (pool_id != JPOOL_IMAGE)
- ERREXIT1(cinfo, JERR_BAD_POOL_ID, pool_id);
-
- result = (jvirt_sarray_ptr)alloc_small(cinfo, pool_id,
- sizeof(struct jvirt_sarray_control));
- result->mem_buffer = NULL;
- result->rows_in_array = numrows;
- result->samplesperrow = samplesperrow;
- result->maxaccess = maxaccess;
- result->pre_zero = pre_zero;
- result->b_s_open = FALSE;
- result->next = mem->virt_sarray_list;
- mem->virt_sarray_list = result;
- return result;
- }
- METHODDEF(jvirt_barray_ptr)
- request_virt_barray(j_common_ptr cinfo, int pool_id, boolean pre_zero,
- JDIMENSION blocksperrow, JDIMENSION numrows,
- JDIMENSION maxaccess)
- {
- my_mem_ptr mem = (my_mem_ptr)cinfo->mem;
- jvirt_barray_ptr result;
-
- if (pool_id != JPOOL_IMAGE)
- ERREXIT1(cinfo, JERR_BAD_POOL_ID, pool_id);
-
- result = (jvirt_barray_ptr)alloc_small(cinfo, pool_id,
- sizeof(struct jvirt_barray_control));
- result->mem_buffer = NULL;
- result->rows_in_array = numrows;
- result->blocksperrow = blocksperrow;
- result->maxaccess = maxaccess;
- result->pre_zero = pre_zero;
- result->b_s_open = FALSE;
- result->next = mem->virt_barray_list;
- mem->virt_barray_list = result;
- return result;
- }
- METHODDEF(void)
- realize_virt_arrays(j_common_ptr cinfo)
- {
- my_mem_ptr mem = (my_mem_ptr)cinfo->mem;
- size_t space_per_minheight, maximum_space, avail_mem;
- size_t minheights, max_minheights;
- jvirt_sarray_ptr sptr;
- jvirt_barray_ptr bptr;
-
- space_per_minheight = 0;
- maximum_space = 0;
- for (sptr = mem->virt_sarray_list; sptr != NULL; sptr = sptr->next) {
- if (sptr->mem_buffer == NULL) {
- size_t new_space = (long)sptr->rows_in_array *
- (long)sptr->samplesperrow * sizeof(JSAMPLE);
- space_per_minheight += (long)sptr->maxaccess *
- (long)sptr->samplesperrow * sizeof(JSAMPLE);
- if (SIZE_MAX - maximum_space < new_space)
- out_of_memory(cinfo, 10);
- maximum_space += new_space;
- }
- }
- for (bptr = mem->virt_barray_list; bptr != NULL; bptr = bptr->next) {
- if (bptr->mem_buffer == NULL) {
- size_t new_space = (long)bptr->rows_in_array *
- (long)bptr->blocksperrow * sizeof(JBLOCK);
- space_per_minheight += (long)bptr->maxaccess *
- (long)bptr->blocksperrow * sizeof(JBLOCK);
- if (SIZE_MAX - maximum_space < new_space)
- out_of_memory(cinfo, 11);
- maximum_space += new_space;
- }
- }
- if (space_per_minheight <= 0)
- return;
-
- avail_mem = jpeg_mem_available(cinfo, space_per_minheight, maximum_space,
- mem->total_space_allocated);
-
- if (avail_mem >= maximum_space)
- max_minheights = 1000000000L;
- else {
- max_minheights = avail_mem / space_per_minheight;
-
- if (max_minheights <= 0)
- max_minheights = 1;
- }
-
- for (sptr = mem->virt_sarray_list; sptr != NULL; sptr = sptr->next) {
- if (sptr->mem_buffer == NULL) {
- minheights = ((long)sptr->rows_in_array - 1L) / sptr->maxaccess + 1L;
- if (minheights <= max_minheights) {
-
- sptr->rows_in_mem = sptr->rows_in_array;
- } else {
-
- sptr->rows_in_mem = (JDIMENSION)(max_minheights * sptr->maxaccess);
- jpeg_open_backing_store(cinfo, &sptr->b_s_info,
- (long)sptr->rows_in_array *
- (long)sptr->samplesperrow *
- (long)sizeof(JSAMPLE));
- sptr->b_s_open = TRUE;
- }
- sptr->mem_buffer = alloc_sarray(cinfo, JPOOL_IMAGE,
- sptr->samplesperrow, sptr->rows_in_mem);
- sptr->rowsperchunk = mem->last_rowsperchunk;
- sptr->cur_start_row = 0;
- sptr->first_undef_row = 0;
- sptr->dirty = FALSE;
- }
- }
- for (bptr = mem->virt_barray_list; bptr != NULL; bptr = bptr->next) {
- if (bptr->mem_buffer == NULL) {
- minheights = ((long)bptr->rows_in_array - 1L) / bptr->maxaccess + 1L;
- if (minheights <= max_minheights) {
-
- bptr->rows_in_mem = bptr->rows_in_array;
- } else {
-
- bptr->rows_in_mem = (JDIMENSION)(max_minheights * bptr->maxaccess);
- jpeg_open_backing_store(cinfo, &bptr->b_s_info,
- (long)bptr->rows_in_array *
- (long)bptr->blocksperrow *
- (long)sizeof(JBLOCK));
- bptr->b_s_open = TRUE;
- }
- bptr->mem_buffer = alloc_barray(cinfo, JPOOL_IMAGE,
- bptr->blocksperrow, bptr->rows_in_mem);
- bptr->rowsperchunk = mem->last_rowsperchunk;
- bptr->cur_start_row = 0;
- bptr->first_undef_row = 0;
- bptr->dirty = FALSE;
- }
- }
- }
- LOCAL(void)
- do_sarray_io(j_common_ptr cinfo, jvirt_sarray_ptr ptr, boolean writing)
- {
- long bytesperrow, file_offset, byte_count, rows, thisrow, i;
- bytesperrow = (long)ptr->samplesperrow * sizeof(JSAMPLE);
- file_offset = ptr->cur_start_row * bytesperrow;
-
- for (i = 0; i < (long)ptr->rows_in_mem; i += ptr->rowsperchunk) {
-
- rows = MIN((long)ptr->rowsperchunk, (long)ptr->rows_in_mem - i);
-
- thisrow = (long)ptr->cur_start_row + i;
- rows = MIN(rows, (long)ptr->first_undef_row - thisrow);
-
- rows = MIN(rows, (long)ptr->rows_in_array - thisrow);
- if (rows <= 0)
- break;
- byte_count = rows * bytesperrow;
- if (writing)
- (*ptr->b_s_info.write_backing_store) (cinfo, &ptr->b_s_info,
- (void *)ptr->mem_buffer[i],
- file_offset, byte_count);
- else
- (*ptr->b_s_info.read_backing_store) (cinfo, &ptr->b_s_info,
- (void *)ptr->mem_buffer[i],
- file_offset, byte_count);
- file_offset += byte_count;
- }
- }
- LOCAL(void)
- do_barray_io(j_common_ptr cinfo, jvirt_barray_ptr ptr, boolean writing)
- {
- long bytesperrow, file_offset, byte_count, rows, thisrow, i;
- bytesperrow = (long)ptr->blocksperrow * sizeof(JBLOCK);
- file_offset = ptr->cur_start_row * bytesperrow;
-
- for (i = 0; i < (long)ptr->rows_in_mem; i += ptr->rowsperchunk) {
-
- rows = MIN((long)ptr->rowsperchunk, (long)ptr->rows_in_mem - i);
-
- thisrow = (long)ptr->cur_start_row + i;
- rows = MIN(rows, (long)ptr->first_undef_row - thisrow);
-
- rows = MIN(rows, (long)ptr->rows_in_array - thisrow);
- if (rows <= 0)
- break;
- byte_count = rows * bytesperrow;
- if (writing)
- (*ptr->b_s_info.write_backing_store) (cinfo, &ptr->b_s_info,
- (void *)ptr->mem_buffer[i],
- file_offset, byte_count);
- else
- (*ptr->b_s_info.read_backing_store) (cinfo, &ptr->b_s_info,
- (void *)ptr->mem_buffer[i],
- file_offset, byte_count);
- file_offset += byte_count;
- }
- }
- METHODDEF(JSAMPARRAY)
- access_virt_sarray(j_common_ptr cinfo, jvirt_sarray_ptr ptr,
- JDIMENSION start_row, JDIMENSION num_rows, boolean writable)
- {
- JDIMENSION end_row = start_row + num_rows;
- JDIMENSION undef_row;
-
- if (end_row > ptr->rows_in_array || num_rows > ptr->maxaccess ||
- ptr->mem_buffer == NULL)
- ERREXIT(cinfo, JERR_BAD_VIRTUAL_ACCESS);
-
- if (start_row < ptr->cur_start_row ||
- end_row > ptr->cur_start_row + ptr->rows_in_mem) {
- if (!ptr->b_s_open)
- ERREXIT(cinfo, JERR_VIRTUAL_BUG);
-
- if (ptr->dirty) {
- do_sarray_io(cinfo, ptr, TRUE);
- ptr->dirty = FALSE;
- }
-
- if (start_row > ptr->cur_start_row) {
- ptr->cur_start_row = start_row;
- } else {
-
- long ltemp;
- ltemp = (long)end_row - (long)ptr->rows_in_mem;
- if (ltemp < 0)
- ltemp = 0;
- ptr->cur_start_row = (JDIMENSION)ltemp;
- }
-
- do_sarray_io(cinfo, ptr, FALSE);
- }
-
- if (ptr->first_undef_row < end_row) {
- if (ptr->first_undef_row < start_row) {
- if (writable)
- ERREXIT(cinfo, JERR_BAD_VIRTUAL_ACCESS);
- undef_row = start_row;
- } else {
- undef_row = ptr->first_undef_row;
- }
- if (writable)
- ptr->first_undef_row = end_row;
- if (ptr->pre_zero) {
- size_t bytesperrow = (size_t)ptr->samplesperrow * sizeof(JSAMPLE);
- undef_row -= ptr->cur_start_row;
- end_row -= ptr->cur_start_row;
- while (undef_row < end_row) {
- jzero_far((void *)ptr->mem_buffer[undef_row], bytesperrow);
- undef_row++;
- }
- } else {
- if (!writable)
- ERREXIT(cinfo, JERR_BAD_VIRTUAL_ACCESS);
- }
- }
-
- if (writable)
- ptr->dirty = TRUE;
-
- return ptr->mem_buffer + (start_row - ptr->cur_start_row);
- }
- METHODDEF(JBLOCKARRAY)
- access_virt_barray(j_common_ptr cinfo, jvirt_barray_ptr ptr,
- JDIMENSION start_row, JDIMENSION num_rows, boolean writable)
- {
- JDIMENSION end_row = start_row + num_rows;
- JDIMENSION undef_row;
-
- if (end_row > ptr->rows_in_array || num_rows > ptr->maxaccess ||
- ptr->mem_buffer == NULL)
- ERREXIT(cinfo, JERR_BAD_VIRTUAL_ACCESS);
-
- if (start_row < ptr->cur_start_row ||
- end_row > ptr->cur_start_row + ptr->rows_in_mem) {
- if (!ptr->b_s_open)
- ERREXIT(cinfo, JERR_VIRTUAL_BUG);
-
- if (ptr->dirty) {
- do_barray_io(cinfo, ptr, TRUE);
- ptr->dirty = FALSE;
- }
-
- if (start_row > ptr->cur_start_row) {
- ptr->cur_start_row = start_row;
- } else {
-
- long ltemp;
- ltemp = (long)end_row - (long)ptr->rows_in_mem;
- if (ltemp < 0)
- ltemp = 0;
- ptr->cur_start_row = (JDIMENSION)ltemp;
- }
-
- do_barray_io(cinfo, ptr, FALSE);
- }
-
- if (ptr->first_undef_row < end_row) {
- if (ptr->first_undef_row < start_row) {
- if (writable)
- ERREXIT(cinfo, JERR_BAD_VIRTUAL_ACCESS);
- undef_row = start_row;
- } else {
- undef_row = ptr->first_undef_row;
- }
- if (writable)
- ptr->first_undef_row = end_row;
- if (ptr->pre_zero) {
- size_t bytesperrow = (size_t)ptr->blocksperrow * sizeof(JBLOCK);
- undef_row -= ptr->cur_start_row;
- end_row -= ptr->cur_start_row;
- while (undef_row < end_row) {
- jzero_far((void *)ptr->mem_buffer[undef_row], bytesperrow);
- undef_row++;
- }
- } else {
- if (!writable)
- ERREXIT(cinfo, JERR_BAD_VIRTUAL_ACCESS);
- }
- }
-
- if (writable)
- ptr->dirty = TRUE;
-
- return ptr->mem_buffer + (start_row - ptr->cur_start_row);
- }
- METHODDEF(void)
- free_pool(j_common_ptr cinfo, int pool_id)
- {
- my_mem_ptr mem = (my_mem_ptr)cinfo->mem;
- small_pool_ptr shdr_ptr;
- large_pool_ptr lhdr_ptr;
- size_t space_freed;
- if (pool_id < 0 || pool_id >= JPOOL_NUMPOOLS)
- ERREXIT1(cinfo, JERR_BAD_POOL_ID, pool_id);
- #ifdef MEM_STATS
- if (cinfo->err->trace_level > 1)
- print_mem_stats(cinfo, pool_id);
- #endif
-
- if (pool_id == JPOOL_IMAGE) {
- jvirt_sarray_ptr sptr;
- jvirt_barray_ptr bptr;
- for (sptr = mem->virt_sarray_list; sptr != NULL; sptr = sptr->next) {
- if (sptr->b_s_open) {
- sptr->b_s_open = FALSE;
- (*sptr->b_s_info.close_backing_store) (cinfo, &sptr->b_s_info);
- }
- }
- mem->virt_sarray_list = NULL;
- for (bptr = mem->virt_barray_list; bptr != NULL; bptr = bptr->next) {
- if (bptr->b_s_open) {
- bptr->b_s_open = FALSE;
- (*bptr->b_s_info.close_backing_store) (cinfo, &bptr->b_s_info);
- }
- }
- mem->virt_barray_list = NULL;
- }
-
- lhdr_ptr = mem->large_list[pool_id];
- mem->large_list[pool_id] = NULL;
- while (lhdr_ptr != NULL) {
- large_pool_ptr next_lhdr_ptr = lhdr_ptr->next;
- space_freed = lhdr_ptr->bytes_used +
- lhdr_ptr->bytes_left +
- sizeof(large_pool_hdr);
- jpeg_free_large(cinfo, (void *)lhdr_ptr, space_freed);
- mem->total_space_allocated -= space_freed;
- lhdr_ptr = next_lhdr_ptr;
- }
-
- shdr_ptr = mem->small_list[pool_id];
- mem->small_list[pool_id] = NULL;
- while (shdr_ptr != NULL) {
- small_pool_ptr next_shdr_ptr = shdr_ptr->next;
- space_freed = shdr_ptr->bytes_used + shdr_ptr->bytes_left +
- sizeof(small_pool_hdr);
- jpeg_free_small(cinfo, (void *)shdr_ptr, space_freed);
- mem->total_space_allocated -= space_freed;
- shdr_ptr = next_shdr_ptr;
- }
- }
- METHODDEF(void)
- self_destruct(j_common_ptr cinfo)
- {
- int pool;
-
- for (pool = JPOOL_NUMPOOLS - 1; pool >= JPOOL_PERMANENT; pool--) {
- free_pool(cinfo, pool);
- }
-
- jpeg_free_small(cinfo, (void *)cinfo->mem, sizeof(my_memory_mgr));
- cinfo->mem = NULL;
- jpeg_mem_term(cinfo);
- }
- GLOBAL(void)
- jinit_memory_mgr(j_common_ptr cinfo)
- {
- my_mem_ptr mem;
- long max_to_use;
- int pool;
- size_t test_mac;
- cinfo->mem = NULL;
-
- if ((ALIGN_SIZE & (ALIGN_SIZE - 1)) != 0)
- ERREXIT(cinfo, JERR_BAD_ALIGN_TYPE);
-
- test_mac = (size_t)MAX_ALLOC_CHUNK;
- if ((long)test_mac != MAX_ALLOC_CHUNK ||
- (MAX_ALLOC_CHUNK % ALIGN_SIZE) != 0)
- ERREXIT(cinfo, JERR_BAD_ALLOC_CHUNK);
- max_to_use = jpeg_mem_init(cinfo);
-
- mem = (my_mem_ptr)jpeg_get_small(cinfo, sizeof(my_memory_mgr));
- if (mem == NULL) {
- jpeg_mem_term(cinfo);
- ERREXIT1(cinfo, JERR_OUT_OF_MEMORY, 0);
- }
-
- mem->pub.alloc_small = alloc_small;
- mem->pub.alloc_large = alloc_large;
- mem->pub.alloc_sarray = alloc_sarray;
- mem->pub.alloc_barray = alloc_barray;
- mem->pub.request_virt_sarray = request_virt_sarray;
- mem->pub.request_virt_barray = request_virt_barray;
- mem->pub.realize_virt_arrays = realize_virt_arrays;
- mem->pub.access_virt_sarray = access_virt_sarray;
- mem->pub.access_virt_barray = access_virt_barray;
- mem->pub.free_pool = free_pool;
- mem->pub.self_destruct = self_destruct;
-
- mem->pub.max_alloc_chunk = MAX_ALLOC_CHUNK;
-
- mem->pub.max_memory_to_use = max_to_use;
- for (pool = JPOOL_NUMPOOLS - 1; pool >= JPOOL_PERMANENT; pool--) {
- mem->small_list[pool] = NULL;
- mem->large_list[pool] = NULL;
- }
- mem->virt_sarray_list = NULL;
- mem->virt_barray_list = NULL;
- mem->total_space_allocated = sizeof(my_memory_mgr);
-
- cinfo->mem = &mem->pub;
-
- #ifndef NO_GETENV
- {
- char *memenv;
- if ((memenv = getenv("JPEGMEM")) != NULL) {
- char ch = 'x';
- if (sscanf(memenv, "%ld%c", &max_to_use, &ch) > 0) {
- if (ch == 'm' || ch == 'M')
- max_to_use *= 1000L;
- mem->pub.max_memory_to_use = max_to_use * 1000L;
- }
- }
- }
- #endif
- }
|