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Merge pull request 'Cleaned memory management for bitstream' (#41) from develop-gws into feat/api

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This commit is contained in:
Patrick Vogler 2024-07-09 11:45:28 +02:00
commit bbc538d5e8
Signed by: Patrick Vogler
GPG key ID: 5536B08CE82E8509
8 changed files with 123 additions and 199 deletions
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8
include/library/private/bitstream.h
View file

@ -92,7 +92,7 @@
\************************************************************************************************/
uint64 bytes_used (bitstream const *const stream);
//==========|==========================|======================|======|======|=====================
bitstream* init_stream (uchar *const memory,
bitstream* init_bitstream (uchar *const memory,
uint32 const size,
char const instr);
//==========|==========================|======================|======|======|=====================
@ -117,8 +117,10 @@
//==========|==========================|======================|======|======|=====================
uchar get_bit (bitstream *const stream);
//==========|==========================|======================|======|======|=====================
uchar terminate_stream (bitstream *stream,
bwc_span *const packed_stream);
uchar shrink_to_fit (bitstream *const stream);
//==========|==========================|======================|======|======|=====================
uchar transfer_to_span (bitstream *const stream,
bwc_span *const span);
//==========|==========================|======================|======|======|=====================
void release_packed_stream (bwc_span *const stream);
#endif

2
include/library/private/codestream.h
View file

@ -97,7 +97,7 @@
uchar codestream_write_com (bwc_span *const header,
bwc_span *const com);
//==========|==========================|======================|======|======|=====================
bwc_span* assemble_codestream (bwc_codec *const codec,
size_t assemble_codestream (bwc_codec *const codec,
bwc_stream *const stream);
//==========|==========================|======================|======|======|=====================
bwc_codec* parse_codestream (bwc_codec *const codec,

2
include/library/private/libbwc.h
View file

@ -149,7 +149,7 @@
bwc_stream *const data,
char *const rate_control);
//==========|==========================|======================|======|=======|====================
uchar bwc_compress (bwc_codec *const field,
size_t bwc_compress (bwc_codec *const field,
bwc_stream *const data);
//==========|==========================|======================|======|=======|====================
uchar bwc_create_decompression (bwc_codec *const codec,

1
include/library/private/types.h
View file

@ -172,7 +172,6 @@
{
struct codestream
{
bwc_span *data; // Data codestream block.
bwc_span *aux; // Auxiliary info. codestream block.
bwc_span *com; // Comment codestream block.
}codestream;

236
src/library/bitstream.c
View file

@ -107,8 +107,6 @@ bytes_used(bitstream const *const stream)
}
/*----------------------------------------------------------------------------------------------------------*\
! FUNCTION NAME: bitstream* bwc_init_stream(uchar* memory, uint32 size, char instr) !
! -------------- !
! !
! DESCRIPTION: !
! ------------ !
@ -145,7 +143,7 @@ bytes_used(bitstream const *const stream)
! !
\*----------------------------------------------------------------------------------------------------------*/
bitstream*
init_stream(uchar* memory, uint32 size, char instr)
init_bitstream(uchar* memory, uint32 size, char instr)
{
/*-----------------------*\
! DEFINE STRUCTS: !
@ -155,6 +153,7 @@ init_stream(uchar* memory, uint32 size, char instr)
/*-----------------------*\
! DEFINE ASSERTIONS: !
\*-----------------------*/
assert(memory);
assert(instr == 'c' || instr == 'd');
/*--------------------------------------------------------*\
@ -168,39 +167,11 @@ init_stream(uchar* memory, uint32 size, char instr)
return NULL;
}
// TODO: Here is a problem. Memory might be allocated here or coming from outside.
// Violates RAII. Can lead to problem in terminate_stream.
/*--------------------------------------------------------*\
! Evaluate if a valid memory handle has been passed by the !
! function caller. !
\*--------------------------------------------------------*/
if(!memory)
{
/*--------------------------------------------------------*\
! If no valid memory handle has been passed, allocate a !
! memory block with the specifiec stream size. !
\*--------------------------------------------------------*/
stream->memory = calloc(size, sizeof(uchar));
if(!stream->memory)
{
// memory allocation error
fprintf(stderr, MEMERROR);
return NULL;
}
}
else
{
/*--------------------------------------------------------*\
! If a valid memory handle has been passed for decoding, !
! save the memory handle in the bwc stream structure. !
\*--------------------------------------------------------*/
stream->memory = memory;
}
/*--------------------------------------------------------*\
! Initialize the byte buffer counter, stream size and size !
! increment for the current stream. !
\*--------------------------------------------------------*/
stream->memory = memory;
stream->t = (instr == 'c') ? 8 : 0;
stream->Lmax = size;
stream->size_incr = (uint64)(size / 2);
@ -249,11 +220,6 @@ init_stream(uchar* memory, uint32 size, char instr)
void
emit_chunck(bitstream *const stream, const uchar* chunck, const uint64 size)
{
/*-----------------------*\
! DEFINE INT VARIABLES: !
\*-----------------------*/
uint64 Lreq;
/*-----------------------*\
! DEFINE ASSERTIONS: !
\*-----------------------*/
@ -261,54 +227,30 @@ emit_chunck(bitstream *const stream, const uchar* chunck, const uint64 size)
assert(chunck);
/*--------------------------------------------------------*\
! Evaluate the memory block size if the current chunck of !
! data is written to the stream. !
! Check if an error was encountered in a previous writing !
! operation !
\*--------------------------------------------------------*/
Lreq = (bytes_used(stream) + size);
/*--------------------------------------------------------*\
! Check if the enough memory has been allocated for the !
! stream to store the additional data chunck. !
\*--------------------------------------------------------*/
if(Lreq > stream->Lmax)
if(!stream->error)
{
/*--------------------------------------------------------*\
! If the stream is not large enough, check if this is due !
! to an error encountered in a previous writing operation !
! Check if the enough memory has been allocated for the !
! stream to store the additional symbol. !
\*--------------------------------------------------------*/
if(!stream->error)
if((bytes_used(stream) + size) > stream->Lmax)
{
/*--------------------------------------------------------*\
! If the error flag is not set, increase the stream size !
! until it is large enough to store the additional data !
! chunck. !
\*--------------------------------------------------------*/
while(Lreq > stream->Lmax)
{
stream->Lmax += stream->size_incr + size;
stream->size_incr = (uint64)(stream->Lmax / 2);
}
/*--------------------------------------------------------*\
! Reallocate the stream data block. !
\*--------------------------------------------------------*/
stream->memory = realloc(stream->memory, stream->Lmax);
if(!stream->memory)
{
// memory allocation error
stream->error |= 1;
stream->Lmax = 0;
return;
}
}
else
{
/*--------------------------------------------------------*\
! Exit to function caller if error flag has been set. !
\*--------------------------------------------------------*/
// memory allocation error
stream->error |= 1;
stream->Lmax = 0;
return;
}
}
else
{
/*--------------------------------------------------------*\
! Exit to function caller if error flag has been set. !
\*--------------------------------------------------------*/
return;
}
/*--------------------------------------------------------*\
! Copy the additional data to the stream memory block. !
@ -372,44 +314,30 @@ emit_symbol(bitstream *const stream, const uint64 symbol, const uint8 size)
assert(stream);
/*--------------------------------------------------------*\
! Check if the enough memory has been allocated for the !
! stream to store the additional symbol. !
! Check if an error was encountered in a previous writing !
! operation !
\*--------------------------------------------------------*/
if((bytes_used(stream) + size) > stream->Lmax)
if(!stream->error)
{
/*--------------------------------------------------------*\
! If the stream is not large enough, check if this is due !
! to an error encountered in a previous writing operation !
! Check if the enough memory has been allocated for the !
! stream to store the additional symbol. !
\*--------------------------------------------------------*/
if(!stream->error)
if((bytes_used(stream) + size) > stream->Lmax)
{
/*--------------------------------------------------------*\
! If the error flag is not set, increment the stream size !
! to store the additional symbol. !
\*--------------------------------------------------------*/
stream->Lmax += stream->size_incr;
stream->size_incr = (uint64)(stream->Lmax / 2);
/*--------------------------------------------------------*\
! Reallocate the stream data block. !
\*--------------------------------------------------------*/
stream->memory = realloc(stream->memory, stream->Lmax);
if(!stream->memory)
{
// memory allocation error
stream->error |= 1;
stream->Lmax = 0;
return;
}
}
else
{
/*--------------------------------------------------------*\
! Exit to function caller if error flag has been set. !
\*--------------------------------------------------------*/
// memory allocation error
stream->error |= 1;
stream->Lmax = 0;
return;
}
}
else
{
/*--------------------------------------------------------*\
! Exit to function caller if error flag has been set. !
\*--------------------------------------------------------*/
return;
}
/*--------------------------------------------------------*\
! Copy the additional symbol to the stream memory block !
@ -870,74 +798,74 @@ flush_stream(bitstream *const stream)
}
/*----------------------------------------------------------------------------------------------------------*\
! FUNCTION NAME: void *test(void) !
! -------------- !
! !
! DESCRIPTION: !
! ------------ !
! DESCRIPTION NEEDED !
! !
! PARAMETERS: !
! ----------- !
! Variable Type Description !
! -------- ---- ----------- !
! - - - !
! Shrinks the bitstream memory to the actually filled range. !
! !
! RETURN VALUE: !
! ------------- !
! Type Description !
! ---- ----------- !
! - - !
! !
! DEVELOPMENT HISTORY: !
! -------------------- !
! !
! Date Author Change Id Release Description Of Change !
! ---- ------ --------- ------- --------------------- !
! - Patrick Vogler B87D120 V 0.1.0 function created !
! Returns 0 if successfull and 1 if memory could not be resized. !
! !
\*----------------------------------------------------------------------------------------------------------*/
uchar
terminate_stream(bitstream *stream, bwc_span *const packed_stream)
shrink_to_fit(bitstream *const stream)
{
/*-----------------------*\
! DEFINE ASSERTIONS: !
\*-----------------------*/
assert(stream);
// TODO: this seems dangerous because the bitstream is generated from provided (non-owning) pointer or allocated (owning).
// If the former is the case a user might get reallocations on his/her pointer.
// This risk is eminent now as bwc_stream data.out is now a user provided buffer pointer.
if(packed_stream)
if(stream->error)
{
if(stream->error)
return 1;
}
else if(stream->L > stream->Lmax)
{
stream->Lmax = stream->L;
stream->memory = realloc(stream->memory, stream->Lmax);
if(!stream->memory)
{
// memory allocation error
fprintf(stderr, MEMERROR);
stream->Lmax = 0;
return 1;
}
else if(stream->L != stream->Lmax)
{
stream->Lmax = stream->L;
stream->memory = realloc(stream->memory, stream->Lmax);
if(!stream->memory)
{
// memory allocation error
fprintf(stderr, MEMERROR);
stream->Lmax = 0;
return 1;
}
}
}
return 0;
}
packed_stream->memory = stream->memory;
packed_stream->access = stream->memory;
packed_stream->size = stream->L;
packed_stream->position = 0;
}
else
/*----------------------------------------------------------------------------------------------------------*\
! DESCRIPTION: !
! ------------ !
! Swap memory pointer and size to span. Invalidates stream pointers. !
! !
! RETURN VALUE: !
! ------------- !
! Returns 0 if successfull and 1 if stream had previous memory error. !
! !
\*----------------------------------------------------------------------------------------------------------*/
uchar
transfer_to_span(bitstream *const stream, bwc_span *const span)
{
/*-----------------------*\
! DEFINE ASSERTIONS: !
\*-----------------------*/
assert(stream);
assert(span);
if(stream->error)
{
free(stream->memory);
return 1;
}
free(stream);
span->memory = stream->memory;
span->access = stream->memory;
span->size = stream->L;
span->position = 0;
stream->memory = NULL;
stream->L = 0;
return 0;
}

28
src/library/codestream.c
View file

@ -1335,12 +1335,13 @@ parse_body(bwc_codec *const field, bitstream *const stream)
! 13.06.2019 Patrick Vogler B87D120 V 0.1.0 function created !
! !
\*----------------------------------------------------------------------------------------------------------*/
bwc_span*
size_t
assemble_codestream(bwc_codec *const field, bwc_stream *const data)
{
/*-----------------------*\
! DEFINE INT VARIABLES: !
\*-----------------------*/
size_t compressed_size;
uint64 i;
/*-----------------------*\
@ -1349,7 +1350,6 @@ assemble_codestream(bwc_codec *const field, bwc_stream *const data)
bwc_gl_ctrl *control;
bwc_tile *tile;
bitstream *stream;
bwc_span *packed_stream;
/*-----------------------*\
! DEFINE ASSERTIONS: !
@ -1385,7 +1385,7 @@ assemble_codestream(bwc_codec *const field, bwc_stream *const data)
\*--------------------------------------------------------*/
if(sequence_packets(field, tile))
{
return NULL;
return 0;
}
control->codestreamSize += tile->control.header_size +
tile->control.body_size;
@ -1395,7 +1395,7 @@ assemble_codestream(bwc_codec *const field, bwc_stream *const data)
! Initialize the final codestream and emit the header !
! bytes. !
\*--------------------------------------------------------*/
stream = init_stream(data->out, control->codestreamSize, 'c');
stream = init_bitstream(data->out, control->codestreamSize, 'c');
codestream_write_header(stream, field, data);
/*--------------------------------------------------------*\
@ -1416,22 +1416,10 @@ assemble_codestream(bwc_codec *const field, bwc_stream *const data)
emit_symbol(stream, EOC, 2);
packed_stream = calloc(1, sizeof(bwc_span));
if(!packed_stream)
{
// memory allocation error
fprintf(stderr, MEMERROR);
return NULL;
}
compressed_size = stream->L;
free(stream);
if(terminate_stream(stream, packed_stream))
{
return NULL;
}
else
{
return packed_stream;
}
return compressed_size;
}
/*----------------------------------------------------------------------------------------------------------*\
@ -1484,7 +1472,7 @@ parse_codestream(bwc_codec *const codec, bwc_stream *const data, uint8 const lay
! Initialize a bitstream used to parse the packed code- !
! stream. !
\*--------------------------------------------------------*/
stream = init_stream(data->inp, 10, 'd');
stream = init_bitstream(data->inp, 10, 'd');
/*--------------------------------------------------------*\
! Parse the main header and set up the codec structure for !

26
src/library/libbwc.c
View file

@ -1595,10 +1595,6 @@ bwc_free_data(bwc_stream* data)
{
if(data)
{
if(data->codestream.data)
{
release_packed_stream(data->codestream.data);
}
if(data->codestream.aux)
{
release_packed_stream(data->codestream.aux);
@ -1607,7 +1603,6 @@ bwc_free_data(bwc_stream* data)
{
release_packed_stream(data->codestream.com);
}
free(data->codestream.data);
free(data->codestream.aux);
free(data->codestream.com);
free(data);
@ -3652,12 +3647,13 @@ bwc_create_compression(bwc_codec *codec, bwc_stream *stream, char *rate_control)
! 15.03.2018 Patrick Vogler B87D120 V 0.1.0 function created !
! !
\*----------------------------------------------------------------------------------------------------------*/
uchar
size_t
bwc_compress(bwc_codec *const field, bwc_stream *const data)
{
/*-----------------------*\
! DEFINE INT VARIABLES: !
\*-----------------------*/
size_t compressed_size = 0;
uint64 buff_size = 0;
uint64 i;
uint16 p;
@ -3731,7 +3727,7 @@ bwc_compress(bwc_codec *const field, bwc_stream *const data)
{
// memory allocation error
fprintf(stderr, MEMERROR);
return 1;
return 0;
}
/*--------------------------------------------------------*\
@ -3812,7 +3808,7 @@ bwc_compress(bwc_codec *const field, bwc_stream *const data)
if(forward_wavelet_transform(field, parameter))
{
free(working_buffer);
return 1;
return 0;
}
#ifdef BWC_PROFILE
#if defined (_OPENMP)
@ -3837,7 +3833,7 @@ bwc_compress(bwc_codec *const field, bwc_stream *const data)
if(t1_encode(field, tile, parameter))
{
free(working_buffer);
return 1;
return 0;
}
#ifdef BWC_PROFILE
#if defined (_OPENMP)
@ -3868,7 +3864,7 @@ bwc_compress(bwc_codec *const field, bwc_stream *const data)
if(t2_encode(field, tile))
{
free(working_buffer);
return 1;
return 0;
}
#ifdef BWC_PROFILE
#if defined (_OPENMP)
@ -3890,11 +3886,11 @@ bwc_compress(bwc_codec *const field, bwc_stream *const data)
start = (double)clock();
#endif
#endif
data->codestream.data = assemble_codestream(field, data);
if(!data->codestream.data)
compressed_size = assemble_codestream(field, data);
if(compressed_size == 0)
{
free(working_buffer);
return 1;
return 0;
}
#ifdef BWC_PROFILE
#if defined (_OPENMP)
@ -3922,7 +3918,7 @@ bwc_compress(bwc_codec *const field, bwc_stream *const data)
#endif
nfs = (uint64)(info->nX * info->nY * info->nZ * info->nTS * info->nPar * info->data_prec);
css = (uint64)data->codestream.data->size;
css = (uint64)compressed_size;
cpr = (double)nfs/css;
@ -3944,7 +3940,7 @@ bwc_compress(bwc_codec *const field, bwc_stream *const data)
/*--------------------------------------------------------*\
! Return to the function caller. !
\*--------------------------------------------------------*/
return 0;
return compressed_size;
}
/*----------------------------------------------------------------------------------------------------------*\

19
src/library/tier2.c
View file

@ -450,6 +450,7 @@ create_packet(bwc_codec *const field, bwc_tile *const tile,
int16 *cp_contr;
int16 delta_z;
int8 m;
uchar *memory;
/*-----------------------*\
! DEFINE STRUCTS: !
@ -482,7 +483,14 @@ create_packet(bwc_codec *const field, bwc_tile *const tile,
! Initialize the stream that is used to assemble the pack- !
! et header. !
\*--------------------------------------------------------*/
header = init_stream(NULL, PACKET_HEADER_SIZE, 'c');
memory = calloc(PACKET_HEADER_SIZE, sizeof(uchar));
if(!memory)
{
// memory allocation error
fprintf(stderr, MEMERROR);
return -1;
}
header = init_bitstream(memory, PACKET_HEADER_SIZE, 'c');
if(!header)
{
// memory allocation error
@ -644,7 +652,8 @@ create_packet(bwc_codec *const field, bwc_tile *const tile,
}
k = header->L;
terminate_stream(header, NULL);
free(header->memory);
free(header);
return k;
}
/*--------------------------------------------------------*\
@ -655,11 +664,13 @@ create_packet(bwc_codec *const field, bwc_tile *const tile,
\*--------------------------------------------------------*/
else
{
if(terminate_stream(header, &packet->header))
if(shrink_to_fit(header))
{
// memory allocation error
return -1;
}
transfer_to_span(header, &packet->header);
free(header);
packet->size = packet->body.size + packet->header.size;
@ -1392,7 +1403,7 @@ parse_packet(bwc_codec *const field, bwc_tile *const tile,
! Initialize the stream that is used to parse the packet !
! codestream. !
\*--------------------------------------------------------*/
header = init_stream(packet->header.memory, body_size, 'd');
header = init_bitstream(packet->header.memory, body_size, 'd');
if(!header)
{
// memory allocation error