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vgmstream/src/streamfile.c

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#ifndef _MSC_VER
#include <unistd.h>
#endif
#include "streamfile.h"
#include "util.h"
#include "vgmstream.h"
/* a STREAMFILE that operates via standard IO using a buffer */
typedef struct {
STREAMFILE sf; /* callbacks */
FILE * infile; /* actual FILE */
char name[PATH_LIMIT]; /* FILE filename */
off_t offset; /* last read offset (info) */
off_t buffer_offset; /* current buffer data start */
uint8_t * buffer; /* data buffer */
size_t buffersize; /* max buffer size */
size_t validsize; /* current buffer size */
size_t filesize; /* buffered file size */
} STDIOSTREAMFILE;
static STREAMFILE * open_stdio_streamfile_buffer(const char * const filename, size_t buffersize);
static STREAMFILE * open_stdio_streamfile_buffer_by_file(FILE *infile,const char * const filename, size_t buffersize);
static size_t read_stdio(STDIOSTREAMFILE *streamfile,uint8_t * dest, off_t offset, size_t length) {
size_t length_read_total = 0;
if (!streamfile || !dest || length <= 0 || offset < 0)
return 0;
/* is the part of the requested length in the buffer? */
if (offset >= streamfile->buffer_offset && offset < streamfile->buffer_offset + streamfile->validsize) {
size_t length_to_read;
off_t offset_into_buffer = offset - streamfile->buffer_offset;
length_to_read = streamfile->validsize - offset_into_buffer;
if (length_to_read > length)
length_to_read = length;
memcpy(dest,streamfile->buffer + offset_into_buffer,length_to_read);
length_read_total += length_to_read;
length -= length_to_read;
offset += length_to_read;
dest += length_to_read;
}
/* read the rest of the requested length */
while (length > 0) {
size_t length_to_read;
/* ignore requests at EOF */
if (offset >= streamfile->filesize) {
//offset = streamfile->filesize; /* seems fseek doesn't clamp offset */
VGM_ASSERT_ONCE(offset > streamfile->filesize, "STDIO: reading over filesize 0x%x @ 0x%x + 0x%x\n", streamfile->filesize, (uint32_t)offset, length);
break;
}
/* position to new offset */
if (fseeko(streamfile->infile,offset,SEEK_SET)) {
break; /* this shouldn't happen in our code */
}
#ifdef _MSC_VER
/* Workaround a bug that appears when compiling with MSVC (later versions).
* This bug is deterministic and seemingly appears randomly after seeking.
* It results in fread returning data from the wrong area of the file.
* HPS is one format that is almost always affected by this. */
fseek(streamfile->infile, ftell(streamfile->infile), SEEK_SET);
#endif
/* fill the buffer (offset now is beyond buffer_offset) */
streamfile->buffer_offset = offset;
streamfile->validsize = fread(streamfile->buffer,sizeof(uint8_t),streamfile->buffersize,streamfile->infile);
/* decide how much must be read this time */
if (length > streamfile->buffersize)
length_to_read = streamfile->buffersize;
else
length_to_read = length;
/* give up on partial reads (EOF) */
if (streamfile->validsize < length_to_read) {
memcpy(dest,streamfile->buffer,streamfile->validsize);
offset += streamfile->validsize;
length_read_total += streamfile->validsize;
break;
}
/* use the new buffer */
memcpy(dest,streamfile->buffer,length_to_read);
offset += length_to_read;
length_read_total += length_to_read;
length -= length_to_read;
dest += length_to_read;
}
streamfile->offset = offset; /* last fread offset */
return length_read_total;
}
static size_t get_size_stdio(STDIOSTREAMFILE * streamfile) {
return streamfile->filesize;
}
static off_t get_offset_stdio(STDIOSTREAMFILE *streamfile) {
return streamfile->offset;
}
static void get_name_stdio(STDIOSTREAMFILE *streamfile,char *buffer,size_t length) {
strncpy(buffer,streamfile->name,length);
buffer[length-1]='\0';
}
static void close_stdio(STDIOSTREAMFILE * streamfile) {
fclose(streamfile->infile);
free(streamfile->buffer);
free(streamfile);
}
static STREAMFILE *open_stdio(STDIOSTREAMFILE *streamFile,const char * const filename,size_t buffersize) {
int newfd;
FILE *newfile;
STREAMFILE *newstreamFile;
if (!filename)
return NULL;
#if !defined (__ANDROID__)
// if same name, duplicate the file pointer we already have open
if (!strcmp(streamFile->name,filename)) {
if (((newfd = dup(fileno(streamFile->infile))) >= 0) &&
(newfile = fdopen( newfd, "rb" )))
{
newstreamFile = open_stdio_streamfile_buffer_by_file(newfile,filename,buffersize);
if (newstreamFile) {
return newstreamFile;
}
// failure, close it and try the default path (which will probably fail a second time)
fclose(newfile);
}
}
#endif
// a normal open, open a new file
return open_stdio_streamfile_buffer(filename,buffersize);
}
static STREAMFILE * open_stdio_streamfile_buffer_by_file(FILE *infile,const char * const filename, size_t buffersize) {
uint8_t * buffer = NULL;
STDIOSTREAMFILE * streamfile = NULL;
buffer = calloc(buffersize,1);
if (!buffer) goto fail;
streamfile = calloc(1,sizeof(STDIOSTREAMFILE));
if (!streamfile) goto fail;
streamfile->sf.read = (void*)read_stdio;
streamfile->sf.get_size = (void*)get_size_stdio;
streamfile->sf.get_offset = (void*)get_offset_stdio;
streamfile->sf.get_name = (void*)get_name_stdio;
streamfile->sf.open = (void*)open_stdio;
streamfile->sf.close = (void*)close_stdio;
streamfile->infile = infile;
streamfile->buffersize = buffersize;
streamfile->buffer = buffer;
strncpy(streamfile->name,filename,sizeof(streamfile->name));
streamfile->name[sizeof(streamfile->name)-1] = '\0';
/* cache filesize */
fseeko(streamfile->infile,0,SEEK_END);
streamfile->filesize = ftello(streamfile->infile);
/* Typically fseek(o)/ftell(o) may only handle up to ~2.14GB, signed 32b = 0x7FFFFFFF
* (happens in banks like FSB, though rarely). Can be remedied with the
* preprocessor (-D_FILE_OFFSET_BITS=64 in GCC) but it's not well tested. */
if (streamfile->filesize == 0xFFFFFFFF) { /* -1 on error */
VGM_LOG("STREAMFILE: ftell error\n");
goto fail; /* can be ignored but may result in strange/unexpected behaviors */
}
return &streamfile->sf;
fail:
free(buffer);
free(streamfile);
return NULL;
}
static STREAMFILE * open_stdio_streamfile_buffer(const char * const filename, size_t buffersize) {
FILE * infile;
STREAMFILE *streamFile;
infile = fopen(filename,"rb");
if (!infile) return NULL;
streamFile = open_stdio_streamfile_buffer_by_file(infile,filename,buffersize);
if (!streamFile) {
fclose(infile);
}
return streamFile;
}
STREAMFILE * open_stdio_streamfile(const char * filename) {
return open_stdio_streamfile_buffer(filename,STREAMFILE_DEFAULT_BUFFER_SIZE);
}
STREAMFILE * open_stdio_streamfile_by_file(FILE * file, const char * filename) {
return open_stdio_streamfile_buffer_by_file(file,filename,STREAMFILE_DEFAULT_BUFFER_SIZE);
}
/* **************************************************** */
typedef struct {
STREAMFILE sf;
STREAMFILE *inner_sf;
off_t offset; /* last read offset (info) */
off_t buffer_offset; /* current buffer data start */
uint8_t * buffer; /* data buffer */
size_t buffersize; /* max buffer size */
size_t validsize; /* current buffer size */
size_t filesize; /* buffered file size */
} BUFFER_STREAMFILE;
static size_t buffer_read(BUFFER_STREAMFILE *streamfile, uint8_t * dest, off_t offset, size_t length) {
size_t length_read_total = 0;
if (!streamfile || !dest || length <= 0 || offset < 0)
return 0;
/* is the part of the requested length in the buffer? */
if (offset >= streamfile->buffer_offset && offset < streamfile->buffer_offset + streamfile->validsize) {
size_t length_to_read;
off_t offset_into_buffer = offset - streamfile->buffer_offset;
length_to_read = streamfile->validsize - offset_into_buffer;
if (length_to_read > length)
length_to_read = length;
memcpy(dest,streamfile->buffer + offset_into_buffer,length_to_read);
length_read_total += length_to_read;
length -= length_to_read;
offset += length_to_read;
dest += length_to_read;
}
/* read the rest of the requested length */
while (length > 0) {
size_t length_to_read;
/* ignore requests at EOF */
if (offset >= streamfile->filesize) {
//offset = streamfile->filesize; /* seems fseek doesn't clamp offset */
VGM_ASSERT_ONCE(offset > streamfile->filesize, "BUFFER: reading over filesize 0x%x @ 0x%x + 0x%x\n", streamfile->filesize, (uint32_t)offset, length);
break;
}
/* fill the buffer (offset now is beyond buffer_offset) */
streamfile->buffer_offset = offset;
streamfile->validsize = streamfile->inner_sf->read(streamfile->inner_sf, streamfile->buffer, streamfile->buffer_offset, streamfile->buffersize);
/* decide how much must be read this time */
if (length > streamfile->buffersize)
length_to_read = streamfile->buffersize;
else
length_to_read = length;
/* give up on partial reads (EOF) */
if (streamfile->validsize < length_to_read) {
memcpy(dest,streamfile->buffer,streamfile->validsize);
offset += streamfile->validsize;
length_read_total += streamfile->validsize;
break;
}
/* use the new buffer */
memcpy(dest,streamfile->buffer,length_to_read);
offset += length_to_read;
length_read_total += length_to_read;
length -= length_to_read;
dest += length_to_read;
}
streamfile->offset = offset; /* last fread offset */
return length_read_total;
}
static size_t buffer_get_size(BUFFER_STREAMFILE * streamfile) {
return streamfile->filesize; /* cache */
}
static size_t buffer_get_offset(BUFFER_STREAMFILE * streamfile) {
return streamfile->offset; /* cache */
}
static void buffer_get_name(BUFFER_STREAMFILE *streamfile, char *buffer, size_t length) {
streamfile->inner_sf->get_name(streamfile->inner_sf, buffer, length); /* default */
}
static STREAMFILE *buffer_open(BUFFER_STREAMFILE *streamfile, const char * const filename, size_t buffersize) {
STREAMFILE *new_inner_sf = streamfile->inner_sf->open(streamfile->inner_sf,filename,buffersize);
return open_buffer_streamfile(new_inner_sf, buffersize); /* original buffer size is preferable? */
}
static void buffer_close(BUFFER_STREAMFILE *streamfile) {
streamfile->inner_sf->close(streamfile->inner_sf);
free(streamfile->buffer);
free(streamfile);
}
STREAMFILE *open_buffer_streamfile(STREAMFILE *streamfile, size_t buffer_size) {
BUFFER_STREAMFILE *this_sf = NULL;
if (!streamfile) goto fail;
this_sf = calloc(1,sizeof(BUFFER_STREAMFILE));
if (!this_sf) goto fail;
this_sf->buffersize = buffer_size;
if (this_sf->buffersize == 0)
this_sf->buffersize = STREAMFILE_DEFAULT_BUFFER_SIZE;
this_sf->buffer = calloc(this_sf->buffersize,1);
if (!this_sf->buffer) goto fail;
/* set callbacks and internals */
this_sf->sf.read = (void*)buffer_read;
this_sf->sf.get_size = (void*)buffer_get_size;
this_sf->sf.get_offset = (void*)buffer_get_offset;
this_sf->sf.get_name = (void*)buffer_get_name;
this_sf->sf.open = (void*)buffer_open;
this_sf->sf.close = (void*)buffer_close;
this_sf->sf.stream_index = streamfile->stream_index;
this_sf->inner_sf = streamfile;
this_sf->filesize = streamfile->get_size(streamfile);
return &this_sf->sf;
fail:
if (this_sf) free(this_sf->buffer);
free(this_sf);
return NULL;
}
/* **************************************************** */
//todo stream_index: copy? pass? funtion? external?
//todo use realnames on reopen? simplify?
//todo use safe string ops, this ain't easy
typedef struct {
STREAMFILE sf;
STREAMFILE *inner_sf;
} WRAP_STREAMFILE;
static size_t wrap_read(WRAP_STREAMFILE *streamfile, uint8_t * dest, off_t offset, size_t length) {
return streamfile->inner_sf->read(streamfile->inner_sf, dest, offset, length); /* default */
}
static size_t wrap_get_size(WRAP_STREAMFILE * streamfile) {
return streamfile->inner_sf->get_size(streamfile->inner_sf); /* default */
}
static size_t wrap_get_offset(WRAP_STREAMFILE * streamfile) {
return streamfile->inner_sf->get_offset(streamfile->inner_sf); /* default */
}
static void wrap_get_name(WRAP_STREAMFILE *streamfile, char *buffer, size_t length) {
streamfile->inner_sf->get_name(streamfile->inner_sf, buffer, length); /* default */
}
static void wrap_open(WRAP_STREAMFILE *streamfile, const char * const filename, size_t buffersize) {
streamfile->inner_sf->open(streamfile->inner_sf, filename, buffersize); /* default (don't wrap) */
}
static void wrap_close(WRAP_STREAMFILE *streamfile) {
//streamfile->inner_sf->close(streamfile->inner_sf); /* don't close */
free(streamfile);
}
STREAMFILE *open_wrap_streamfile(STREAMFILE *streamfile) {
WRAP_STREAMFILE *this_sf;
if (!streamfile) return NULL;
this_sf = calloc(1,sizeof(WRAP_STREAMFILE));
if (!this_sf) return NULL;
/* set callbacks and internals */
this_sf->sf.read = (void*)wrap_read;
this_sf->sf.get_size = (void*)wrap_get_size;
this_sf->sf.get_offset = (void*)wrap_get_offset;
this_sf->sf.get_name = (void*)wrap_get_name;
this_sf->sf.open = (void*)wrap_open;
this_sf->sf.close = (void*)wrap_close;
this_sf->sf.stream_index = streamfile->stream_index;
this_sf->inner_sf = streamfile;
return &this_sf->sf;
}
/* **************************************************** */
typedef struct {
STREAMFILE sf;
STREAMFILE *inner_sf;
off_t start;
size_t size;
} CLAMP_STREAMFILE;
static size_t clamp_read(CLAMP_STREAMFILE *streamfile, uint8_t *dest, off_t offset, size_t length) {
off_t inner_offset = streamfile->start + offset;
size_t clamp_length = length > (streamfile->size - offset) ? (streamfile->size - offset) : length;
return streamfile->inner_sf->read(streamfile->inner_sf, dest, inner_offset, clamp_length);
}
static size_t clamp_get_size(CLAMP_STREAMFILE *streamfile) {
return streamfile->size;
}
static off_t clamp_get_offset(CLAMP_STREAMFILE *streamfile) {
return streamfile->inner_sf->get_offset(streamfile->inner_sf) - streamfile->start;
}
static void clamp_get_name(CLAMP_STREAMFILE *streamfile, char *buffer, size_t length) {
streamfile->inner_sf->get_name(streamfile->inner_sf, buffer, length); /* default */
}
static STREAMFILE *clamp_open(CLAMP_STREAMFILE *streamfile, const char * const filename, size_t buffersize) {
char original_filename[PATH_LIMIT];
STREAMFILE *new_inner_sf;
new_inner_sf = streamfile->inner_sf->open(streamfile->inner_sf,filename,buffersize);
streamfile->inner_sf->get_name(streamfile->inner_sf, original_filename, PATH_LIMIT);
/* detect re-opening the file */
if (strcmp(filename, original_filename) == 0) {
return open_clamp_streamfile(new_inner_sf, streamfile->start, streamfile->size); /* clamp again */
} else {
return new_inner_sf; /**/
}
}
static void clamp_close(CLAMP_STREAMFILE *streamfile) {
streamfile->inner_sf->close(streamfile->inner_sf);
free(streamfile);
}
STREAMFILE *open_clamp_streamfile(STREAMFILE *streamfile, off_t start, size_t size) {
CLAMP_STREAMFILE *this_sf;
if (!streamfile || !size) return NULL;
if (start + size > get_streamfile_size(streamfile)) return NULL;
this_sf = calloc(1,sizeof(CLAMP_STREAMFILE));
if (!this_sf) return NULL;
/* set callbacks and internals */
this_sf->sf.read = (void*)clamp_read;
this_sf->sf.get_size = (void*)clamp_get_size;
this_sf->sf.get_offset = (void*)clamp_get_offset;
this_sf->sf.get_name = (void*)clamp_get_name;
this_sf->sf.open = (void*)clamp_open;
this_sf->sf.close = (void*)clamp_close;
this_sf->sf.stream_index = streamfile->stream_index;
this_sf->inner_sf = streamfile;
this_sf->start = start;
this_sf->size = size;
return &this_sf->sf;
}
/* **************************************************** */
typedef struct {
STREAMFILE sf;
STREAMFILE *inner_sf;
void* data; /* state for custom reads, malloc'ed + copied on open (to re-open streamfiles cleanly) */
size_t data_size;
size_t (*read_callback)(STREAMFILE *, uint8_t *, off_t, size_t, void*); /* custom read to modify data before copying into buffer */
size_t (*size_callback)(STREAMFILE *, void*); /* size when custom reads make data smaller/bigger than underlying streamfile */
//todo would need to make sure re-opened streamfiles work with this, maybe should use init_data_callback per call
//size_t (*close_data_callback)(STREAMFILE *, void*); /* called during close, allows to free stuff in data */
} IO_STREAMFILE;
static size_t io_read(IO_STREAMFILE *streamfile, uint8_t *dest, off_t offset, size_t length) {
return streamfile->read_callback(streamfile->inner_sf, dest, offset, length, streamfile->data);
}
static size_t io_get_size(IO_STREAMFILE *streamfile) {
if (streamfile->size_callback)
return streamfile->size_callback(streamfile->inner_sf, streamfile->data);
else
return streamfile->inner_sf->get_size(streamfile->inner_sf); /* default */
}
static off_t io_get_offset(IO_STREAMFILE *streamfile) {
return streamfile->inner_sf->get_offset(streamfile->inner_sf); /* default */
}
static void io_get_name(IO_STREAMFILE *streamfile, char *buffer, size_t length) {
streamfile->inner_sf->get_name(streamfile->inner_sf, buffer, length); /* default */
}
static STREAMFILE *io_open(IO_STREAMFILE *streamfile, const char * const filename, size_t buffersize) {
//todo should have some flag to decide if opening other files with IO
STREAMFILE *new_inner_sf = streamfile->inner_sf->open(streamfile->inner_sf,filename,buffersize);
return open_io_streamfile(new_inner_sf, streamfile->data, streamfile->data_size, streamfile->read_callback, streamfile->size_callback);
}
static void io_close(IO_STREAMFILE *streamfile) {
streamfile->inner_sf->close(streamfile->inner_sf);
free(streamfile->data);
free(streamfile);
}
STREAMFILE *open_io_streamfile(STREAMFILE *streamfile, void* data, size_t data_size, void* read_callback, void* size_callback) {
IO_STREAMFILE *this_sf;
if (!streamfile) return NULL;
if ((data && !data_size) || (!data && data_size)) return NULL;
this_sf = calloc(1,sizeof(IO_STREAMFILE));
if (!this_sf) return NULL;
/* set callbacks and internals */
this_sf->sf.read = (void*)io_read;
this_sf->sf.get_size = (void*)io_get_size;
this_sf->sf.get_offset = (void*)io_get_offset;
this_sf->sf.get_name = (void*)io_get_name;
this_sf->sf.open = (void*)io_open;
this_sf->sf.close = (void*)io_close;
this_sf->sf.stream_index = streamfile->stream_index;
this_sf->inner_sf = streamfile;
if (data) {
this_sf->data = malloc(data_size);
if (!this_sf->data) {
free(this_sf);
return NULL;
}
memcpy(this_sf->data, data, data_size);
}
this_sf->data_size = data_size;
this_sf->read_callback = read_callback;
this_sf->size_callback = size_callback;
return &this_sf->sf;
}
/* **************************************************** */
typedef struct {
STREAMFILE sf;
STREAMFILE *inner_sf;
char fakename[PATH_LIMIT];
} FAKENAME_STREAMFILE;
static size_t fakename_read(FAKENAME_STREAMFILE *streamfile, uint8_t * dest, off_t offset, size_t length) {
return streamfile->inner_sf->read(streamfile->inner_sf, dest, offset, length); /* default */
}
static size_t fakename_get_size(FAKENAME_STREAMFILE * streamfile) {
return streamfile->inner_sf->get_size(streamfile->inner_sf); /* default */
}
static size_t fakename_get_offset(FAKENAME_STREAMFILE * streamfile) {
return streamfile->inner_sf->get_offset(streamfile->inner_sf); /* default */
}
static void fakename_get_name(FAKENAME_STREAMFILE *streamfile, char *buffer, size_t length) {
strncpy(buffer,streamfile->fakename,length);
buffer[length-1]='\0';
}
static STREAMFILE *fakename_open(FAKENAME_STREAMFILE *streamfile, const char * const filename, size_t buffersize) {
/* detect re-opening the file */
if (strcmp(filename, streamfile->fakename) == 0) {
STREAMFILE *new_inner_sf;
char original_filename[PATH_LIMIT];
streamfile->inner_sf->get_name(streamfile->inner_sf, original_filename, PATH_LIMIT);
new_inner_sf = streamfile->inner_sf->open(streamfile->inner_sf, original_filename, buffersize);
return open_fakename_streamfile(new_inner_sf, streamfile->fakename, NULL);
}
else {
return streamfile->inner_sf->open(streamfile->inner_sf, filename, buffersize);
}
}
static void fakename_close(FAKENAME_STREAMFILE *streamfile) {
streamfile->inner_sf->close(streamfile->inner_sf);
free(streamfile);
}
STREAMFILE *open_fakename_streamfile(STREAMFILE *streamfile, const char * fakename, const char* fakeext) {
FAKENAME_STREAMFILE *this_sf;
if (!streamfile || (!fakename && !fakeext)) return NULL;
this_sf = calloc(1,sizeof(FAKENAME_STREAMFILE));
if (!this_sf) return NULL;
/* set callbacks and internals */
this_sf->sf.read = (void*)fakename_read;
this_sf->sf.get_size = (void*)fakename_get_size;
this_sf->sf.get_offset = (void*)fakename_get_offset;
this_sf->sf.get_name = (void*)fakename_get_name;
this_sf->sf.open = (void*)fakename_open;
this_sf->sf.close = (void*)fakename_close;
this_sf->sf.stream_index = streamfile->stream_index;
this_sf->inner_sf = streamfile;
/* copy passed name or retain current, and swap extension if expected */
if (fakename) {
strcpy(this_sf->fakename,fakename);
} else {
streamfile->get_name(streamfile, this_sf->fakename, PATH_LIMIT);
}
if (fakeext) {
char * ext = strrchr(this_sf->fakename,'.');
if (ext != NULL)
ext[1] = '\0'; /* truncate past dot */
strcat(this_sf->fakename, fakeext);
}
return &this_sf->sf;
}
/* **************************************************** */
typedef struct {
STREAMFILE sf;
STREAMFILE **inner_sfs;
size_t inner_sfs_size;
size_t *sizes;
off_t size;
off_t offset;
} MULTIFILE_STREAMFILE;
static size_t multifile_read(MULTIFILE_STREAMFILE *streamfile, uint8_t * dest, off_t offset, size_t length) {
int i, segment = 0;
off_t segment_offset = 0;
size_t done = 0;
if (offset > streamfile->size) {
streamfile->offset = streamfile->size;
return 0;
}
/* map external offset to multifile offset */
for (i = 0; i < streamfile->inner_sfs_size; i++) {
size_t segment_size = streamfile->sizes[i];
/* check if offset falls in this segment */
if (offset >= segment_offset && offset < segment_offset + segment_size) {
segment = i;
segment_offset = offset - segment_offset;
break;
}
segment_offset += segment_size;
}
/* reads can span multiple segments */
while(done < length) {
if (segment >= streamfile->inner_sfs_size) /* over last segment, not fully done */
break;
/* reads over segment size are ok, will return smaller value and continue next segment */
done += streamfile->inner_sfs[segment]->read(streamfile->inner_sfs[segment], dest+done, segment_offset, length - done);
segment++;
segment_offset = 0;
}
streamfile->offset = offset + done;
return done;
}
static size_t multifile_get_size(MULTIFILE_STREAMFILE *streamfile) {
return streamfile->size;
}
static size_t multifile_get_offset(MULTIFILE_STREAMFILE * streamfile) {
return streamfile->offset;
}
static void multifile_get_name(MULTIFILE_STREAMFILE *streamfile, char *buffer, size_t length) {
streamfile->inner_sfs[0]->get_name(streamfile->inner_sfs[0], buffer, length);
}
static STREAMFILE *multifile_open(MULTIFILE_STREAMFILE *streamfile, const char * const filename, size_t buffersize) {
char original_filename[PATH_LIMIT];
STREAMFILE *new_sf = NULL;
STREAMFILE **new_inner_sfs = NULL;
int i;
streamfile->inner_sfs[0]->get_name(streamfile->inner_sfs[0], original_filename, PATH_LIMIT);
/* detect re-opening the file */
if (strcmp(filename, original_filename) == 0) { /* same multifile */
new_inner_sfs = calloc(streamfile->inner_sfs_size, sizeof(STREAMFILE*));
if (!new_inner_sfs) goto fail;
for (i = 0; i < streamfile->inner_sfs_size; i++) {
streamfile->inner_sfs[i]->get_name(streamfile->inner_sfs[i], original_filename, PATH_LIMIT);
new_inner_sfs[i] = streamfile->inner_sfs[i]->open(streamfile->inner_sfs[i], original_filename, buffersize);
if (!new_inner_sfs[i]) goto fail;
}
new_sf = open_multifile_streamfile(new_inner_sfs, streamfile->inner_sfs_size);
if (!new_sf) goto fail;
return new_sf;
}
else {
return streamfile->inner_sfs[0]->open(streamfile->inner_sfs[0], filename, buffersize); /* regular file */
}
fail:
if (new_inner_sfs) {
for (i = 0; i < streamfile->inner_sfs_size; i++)
close_streamfile(new_inner_sfs[i]);
}
free(new_inner_sfs);
return NULL;
}
static void multifile_close(MULTIFILE_STREAMFILE *streamfile) {
int i;
for (i = 0; i < streamfile->inner_sfs_size; i++) {
for (i = 0; i < streamfile->inner_sfs_size; i++) {
close_streamfile(streamfile->inner_sfs[i]);
}
}
free(streamfile->inner_sfs);
free(streamfile->sizes);
free(streamfile);
}
STREAMFILE *open_multifile_streamfile(STREAMFILE **streamfiles, size_t streamfiles_size) {
MULTIFILE_STREAMFILE *this_sf;
int i;
if (!streamfiles || !streamfiles_size) return NULL;
for (i = 0; i < streamfiles_size; i++) {
if (!streamfiles[i]) return NULL;
}
this_sf = calloc(1,sizeof(MULTIFILE_STREAMFILE));
if (!this_sf) goto fail;
/* set callbacks and internals */
this_sf->sf.read = (void*)multifile_read;
this_sf->sf.get_size = (void*)multifile_get_size;
this_sf->sf.get_offset = (void*)multifile_get_offset;
this_sf->sf.get_name = (void*)multifile_get_name;
this_sf->sf.open = (void*)multifile_open;
this_sf->sf.close = (void*)multifile_close;
this_sf->sf.stream_index = streamfiles[0]->stream_index;
this_sf->inner_sfs_size = streamfiles_size;
this_sf->inner_sfs = calloc(streamfiles_size, sizeof(STREAMFILE*));
if (!this_sf->inner_sfs) goto fail;
this_sf->sizes = calloc(streamfiles_size, sizeof(size_t));
if (!this_sf->sizes) goto fail;
for (i = 0; i < this_sf->inner_sfs_size; i++) {
this_sf->inner_sfs[i] = streamfiles[i];
this_sf->sizes[i] = streamfiles[i]->get_size(streamfiles[i]);
this_sf->size += this_sf->sizes[i];
}
return &this_sf->sf;
fail:
if (this_sf) {
free(this_sf->inner_sfs);
free(this_sf->sizes);
}
free(this_sf);
return NULL;
}
/* **************************************************** */
STREAMFILE * open_streamfile(STREAMFILE *streamFile, const char * pathname) {
return streamFile->open(streamFile,pathname,STREAMFILE_DEFAULT_BUFFER_SIZE);
}
STREAMFILE * open_streamfile_by_ext(STREAMFILE *streamFile, const char * ext) {
char filename_ext[PATH_LIMIT];
streamFile->get_name(streamFile,filename_ext,sizeof(filename_ext));
strcpy(filename_ext + strlen(filename_ext) - strlen(filename_extension(filename_ext)), ext);
return streamFile->open(streamFile,filename_ext,STREAMFILE_DEFAULT_BUFFER_SIZE);
}
STREAMFILE * open_streamfile_by_filename(STREAMFILE *streamFile, const char * name) {
char foldername[PATH_LIMIT];
char filename[PATH_LIMIT];
const char *path;
streamFile->get_name(streamFile,foldername,sizeof(foldername));
path = strrchr(foldername,DIR_SEPARATOR);
if (path!=NULL) path = path+1;
if (path) {
strcpy(filename, foldername);
filename[path-foldername] = '\0';
strcat(filename, name);
} else {
strcpy(filename, name);
}
return streamFile->open(streamFile,filename,STREAMFILE_DEFAULT_BUFFER_SIZE);
}
STREAMFILE * reopen_streamfile(STREAMFILE *streamFile, size_t buffer_size) {
char pathname[PATH_LIMIT];
if (buffer_size == 0)
buffer_size = STREAMFILE_DEFAULT_BUFFER_SIZE;
streamFile->get_name(streamFile,pathname,sizeof(pathname));
return streamFile->open(streamFile,pathname,buffer_size);
}
/* Read a line into dst. The source files are lines separated by CRLF (Windows) / LF (Unux) / CR (Mac).
* The line will be null-terminated and CR/LF removed if found.
*
* Returns the number of bytes read (including CR/LF), note that this is not the string length.
* line_done_ptr is set to 1 if the complete line was read into dst; NULL can be passed to ignore.
*/
size_t get_streamfile_text_line(int dst_length, char * dst, off_t offset, STREAMFILE * streamfile, int *line_done_ptr) {
int i;
off_t file_length = get_streamfile_size(streamfile);
int extra_bytes = 0; /* how many bytes over those put in the buffer were read */
if (line_done_ptr) *line_done_ptr = 0;
for (i = 0; i < dst_length-1 && offset+i < file_length; i++) {
char in_char = read_8bit(offset+i,streamfile);
/* check for end of line */
if (in_char == 0x0d && read_8bit(offset+i+1,streamfile) == 0x0a) { /* CRLF */
extra_bytes = 2;
if (line_done_ptr) *line_done_ptr = 1;
break;
}
else if (in_char == 0x0d || in_char == 0x0a) { /* CR or LF */
extra_bytes = 1;
if (line_done_ptr) *line_done_ptr = 1;
break;
}
dst[i] = in_char;
}
dst[i] = '\0';
/* did we fill the buffer? */
if (i == dst_length) {
char in_char = read_8bit(offset+i,streamfile);
/* did the bytes we missed just happen to be the end of the line? */
if (in_char == 0x0d && read_8bit(offset+i+1,streamfile) == 0x0a) { /* CRLF */
extra_bytes = 2;
if (line_done_ptr) *line_done_ptr = 1;
}
else if (in_char == 0x0d || in_char == 0x0a) { /* CR or LF */
extra_bytes = 1;
if (line_done_ptr) *line_done_ptr = 1;
}
}
/* did we hit the file end? */
if (offset+i == file_length) {
/* then we did in fact finish reading the last line */
if (line_done_ptr) *line_done_ptr = 1;
}
return i + extra_bytes;
}
/* reads a c-string (ANSI only), up to maxsize or NULL, returning size. buf is optional (works as get_string_size). */
size_t read_string(char * buf, size_t maxsize, off_t offset, STREAMFILE *streamFile) {
size_t pos;
for (pos = 0; pos < maxsize; pos++) {
char c = read_8bit(offset + pos, streamFile);
if (buf) buf[pos] = c;
if (c == '\0')
return pos;
if (pos+1 == maxsize) { /* null at maxsize and don't validate (expected to be garbage) */
if (buf) buf[pos] = '\0';
return maxsize;
}
if (c < 0x20 || c > 0xA5)
goto fail;
}
fail:
if (buf) buf[0] = '\0';
return 0;
}
/* Opens a file containing decryption keys and copies to buffer.
* Tries combinations of keynames based on the original filename.
* returns size of key if found and copied */
size_t read_key_file(uint8_t * buf, size_t bufsize, STREAMFILE *streamFile) {
char keyname[PATH_LIMIT];
char filename[PATH_LIMIT];
const char *path, *ext;
STREAMFILE * streamFileKey = NULL;
size_t keysize;
streamFile->get_name(streamFile,filename,sizeof(filename));
if (strlen(filename)+4 > sizeof(keyname)) goto fail;
/* try to open a keyfile using variations:
* "(name.ext)key" (per song), "(.ext)key" (per folder) */
{
ext = strrchr(filename,'.');
if (ext!=NULL) ext = ext+1;
path = strrchr(filename,DIR_SEPARATOR);
if (path!=NULL) path = path+1;
/* "(name.ext)key" */
strcpy(keyname, filename);
strcat(keyname, "key");
streamFileKey = streamFile->open(streamFile,keyname,STREAMFILE_DEFAULT_BUFFER_SIZE);
if (streamFileKey) goto found;
/* "(name.ext)KEY" */
/*
strcpy(keyname+strlen(keyname)-3,"KEY");
streamFileKey = streamFile->open(streamFile,keyname,STREAMFILE_DEFAULT_BUFFER_SIZE);
if (streamFileKey) goto found;
*/
/* "(.ext)key" */
if (path) {
strcpy(keyname, filename);
keyname[path-filename] = '\0';
strcat(keyname, ".");
} else {
strcpy(keyname, ".");
}
if (ext) strcat(keyname, ext);
strcat(keyname, "key");
streamFileKey = streamFile->open(streamFile,keyname,STREAMFILE_DEFAULT_BUFFER_SIZE);
if (streamFileKey) goto found;
/* "(.ext)KEY" */
/*
strcpy(keyname+strlen(keyname)-3,"KEY");
streamFileKey = streamFile->open(streamFile,keyname,STREAMFILE_DEFAULT_BUFFER_SIZE);
if (streamFileKey) goto found;
*/
goto fail;
}
found:
keysize = get_streamfile_size(streamFileKey);
if (keysize > bufsize) goto fail;
if (read_streamfile(buf, 0, keysize, streamFileKey) != keysize)
goto fail;
close_streamfile(streamFileKey);
return keysize;
fail:
close_streamfile(streamFileKey);
return 0;
}
/* hack to allow relative paths in various OSs */
void fix_dir_separators(char * filename) {
char c;
int i = 0;
while ((c = filename[i]) != '\0') {
if ((c == '\\' && DIR_SEPARATOR == '/') || (c == '/' && DIR_SEPARATOR == '\\'))
filename[i] = DIR_SEPARATOR;
i++;
}
}
/**
* Checks if the stream filename is one of the extensions (comma-separated, ex. "adx" or "adx,aix").
* Empty is ok to accept files without extension ("", "adx,,aix"). Returns 0 on failure
*/
int check_extensions(STREAMFILE *streamFile, const char * cmp_exts) {
char filename[PATH_LIMIT];
const char * ext = NULL;
const char * cmp_ext = NULL;
const char * ststr_res = NULL;
size_t ext_len, cmp_len;
streamFile->get_name(streamFile,filename,sizeof(filename));
ext = filename_extension(filename);
ext_len = strlen(ext);
cmp_ext = cmp_exts;
do {
ststr_res = strstr(cmp_ext, ",");
cmp_len = ststr_res == NULL
? strlen(cmp_ext) /* total length if more not found */
: (intptr_t)ststr_res - (intptr_t)cmp_ext; /* find next ext; ststr_res should always be greater than cmp_ext, resulting in a positive cmp_len */
if (ext_len == cmp_len && strncasecmp(ext,cmp_ext, ext_len) == 0)
return 1;
cmp_ext = ststr_res;
if (cmp_ext != NULL)
cmp_ext = cmp_ext + 1; /* skip comma */
} while (cmp_ext != NULL);
return 0;
}
/**
* Find a chunk starting from an offset, and save its offset/size (if not NULL), with offset after id/size.
* Works for chunked headers in the form of "chunk_id chunk_size (data)"xN (ex. RIFF).
* The start_offset should be the first actual chunk (not "RIFF" or "WAVE" but "fmt ").
* "full_chunk_size" signals chunk_size includes 4+4+data.
*
* returns 0 on failure
*/
int find_chunk_be(STREAMFILE *streamFile, uint32_t chunk_id, off_t start_offset, int full_chunk_size, off_t *out_chunk_offset, size_t *out_chunk_size) {
return find_chunk(streamFile, chunk_id, start_offset, full_chunk_size, out_chunk_offset, out_chunk_size, 1, 0);
}
int find_chunk_le(STREAMFILE *streamFile, uint32_t chunk_id, off_t start_offset, int full_chunk_size, off_t *out_chunk_offset, size_t *out_chunk_size) {
return find_chunk(streamFile, chunk_id, start_offset, full_chunk_size, out_chunk_offset, out_chunk_size, 0, 0);
}
int find_chunk(STREAMFILE *streamFile, uint32_t chunk_id, off_t start_offset, int full_chunk_size, off_t *out_chunk_offset, size_t *out_chunk_size, int size_big_endian, int zero_size_end) {
size_t filesize;
off_t current_chunk = start_offset;
filesize = get_streamfile_size(streamFile);
/* read chunks */
while (current_chunk < filesize) {
uint32_t chunk_type = read_32bitBE(current_chunk,streamFile);
off_t chunk_size = size_big_endian ?
read_32bitBE(current_chunk+4,streamFile) :
read_32bitLE(current_chunk+4,streamFile);
if (chunk_type == chunk_id) {
if (out_chunk_offset) *out_chunk_offset = current_chunk+8;
if (out_chunk_size) *out_chunk_size = chunk_size;
return 1;
}
/* empty chunk with 0 size, seen in some formats (XVAG uses it as end marker, Wwise doesn't) */
if (chunk_size == 0 && zero_size_end)
return 0;
current_chunk += full_chunk_size ? chunk_size : 4+4+chunk_size;
}
return 0;
}
/* copies name as-is (may include full path included) */
void get_streamfile_name(STREAMFILE *streamFile, char * buffer, size_t size) {
streamFile->get_name(streamFile,buffer,size);
}
/* copies the filename without path */
void get_streamfile_filename(STREAMFILE *streamFile, char * buffer, size_t size) {
char foldername[PATH_LIMIT];
const char *path;
streamFile->get_name(streamFile,foldername,sizeof(foldername));
//todo Windows CMD accepts both \\ and /, better way to handle this?
path = strrchr(foldername,'\\');
if (!path)
path = strrchr(foldername,'/');
if (path != NULL)
path = path+1;
//todo validate sizes and copy sensible max
if (path) {
strcpy(buffer, path);
} else {
strcpy(buffer, foldername);
}
}
/* copies the filename without path or extension */
void get_streamfile_basename(STREAMFILE *streamFile, char * buffer, size_t size) {
char *ext;
get_streamfile_filename(streamFile,buffer,size);
ext = strrchr(buffer,'.');
if (ext) {
ext[0] = '\0'; /* remove .ext from buffer */
}
}
/* copies path removing name (NULL when if filename has no path) */
void get_streamfile_path(STREAMFILE *streamFile, char * buffer, size_t size) {
const char *path;
streamFile->get_name(streamFile,buffer,size);
path = strrchr(buffer,DIR_SEPARATOR);
if (path!=NULL) path = path+1; /* includes "/" */
if (path) {
buffer[path - buffer] = '\0';
} else {
buffer[0] = '\0';
}
}
void get_streamfile_ext(STREAMFILE *streamFile, char * filename, size_t size) {
streamFile->get_name(streamFile,filename,size);
strcpy(filename, filename_extension(filename));
}
/* debug util, mainly for custom IO testing */
void dump_streamfile(STREAMFILE *streamFile, int num) {
#ifdef VGM_DEBUG_OUTPUT
off_t offset = 0;
FILE *f = NULL;
if (num >= 0) {
char filename[PATH_LIMIT];
char dumpname[PATH_LIMIT];
get_streamfile_filename(streamFile, filename, PATH_LIMIT);
snprintf(dumpname,PATH_LIMIT, "%s_%02i.dump", filename, num);
f = fopen(dumpname,"wb");
if (!f) return;
}
VGM_LOG("dump streamfile, size: %x\n", get_streamfile_size(streamFile));
while (offset < get_streamfile_size(streamFile)) {
uint8_t buffer[0x8000];
size_t read;
read = read_streamfile(buffer,offset,0x8000,streamFile);
if (f)
fwrite(buffer,sizeof(uint8_t),read, f);
else
VGM_LOGB(buffer,read,0);
offset += read;
}
if (f) {
fclose(f);
}
#endif
}
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