mirror of
https://github.com/vgmstream/vgmstream.git
synced 2024-09-24 03:08:21 +02:00
87 lines
2.7 KiB
C
87 lines
2.7 KiB
C
#include "xmp_vgmstream.h"
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/* a STREAMFILE that operates via XMPlay's XMPFUNC_FILE+XMPFILE */
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typedef struct _XMPLAY_STREAMFILE {
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STREAMFILE sf; /* callbacks */
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XMPFILE infile; /* actual FILE */
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XMPFUNC_FILE* xmpf_file; /* helper */
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char name[0x8000]; /* path limit */
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off_t offset; /* current offset */
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int internal_xmpfile; /* infile was not supplied externally and can be closed */
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} XMPLAY_STREAMFILE;
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static size_t xmpsf_read(XMPLAY_STREAMFILE* sf, uint8_t* dst, offv_t offset, size_t length) {
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size_t read;
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if (sf->offset != offset) {
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if (sf->xmpf_file->Seek(sf->infile, offset))
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sf->offset = offset;
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else
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sf->offset = sf->xmpf_file->Tell(sf->infile);
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}
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read = sf->xmpf_file->Read(sf->infile, dst, length);
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if (read > 0)
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sf->offset += read;
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return read;
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}
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static off_t xmpsf_get_size(XMPLAY_STREAMFILE* sf) {
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return sf->xmpf_file->GetSize(sf->infile);
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}
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static off_t xmpsf_get_offset(XMPLAY_STREAMFILE* sf) {
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return sf->xmpf_file->Tell(sf->infile);
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}
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static void xmpsf_get_name(XMPLAY_STREAMFILE* sf, char* buffer, size_t length) {
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snprintf(buffer, length, "%s", sf->name);
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buffer[length - 1] = '\0';
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}
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static STREAMFILE* xmpsf_open(XMPLAY_STREAMFILE* sf, const char* const filename, size_t buffersize) {
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XMPFILE newfile;
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if (!filename)
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return NULL;
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newfile = sf->xmpf_file->Open(filename);
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if (!newfile) return NULL;
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return open_xmplay_streamfile_by_xmpfile(newfile, sf->xmpf_file, filename, true); /* internal XMPFILE */
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}
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static void xmpsf_close(XMPLAY_STREAMFILE* sf) {
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/* Close XMPFILE, but only if we opened it (ex. for subfiles inside metas).
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* Otherwise must be left open as other parts of XMPlay need it and would crash. */
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if (sf->internal_xmpfile) {
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sf->xmpf_file->Close(sf->infile);
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}
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free(sf);
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}
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STREAMFILE* open_xmplay_streamfile_by_xmpfile(XMPFILE infile, XMPFUNC_FILE* xmpf_file, const char* path, bool internal) {
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XMPLAY_STREAMFILE* this_sf = calloc(1, sizeof(XMPLAY_STREAMFILE));
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if (!this_sf) return NULL;
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this_sf->sf.read = (void*)xmpsf_read;
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this_sf->sf.get_size = (void*)xmpsf_get_size;
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this_sf->sf.get_offset = (void*)xmpsf_get_offset;
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this_sf->sf.get_name = (void*)xmpsf_get_name;
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this_sf->sf.open = (void*)xmpsf_open;
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this_sf->sf.close = (void*)xmpsf_close;
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this_sf->infile = infile;
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this_sf->offset = 0;
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snprintf(this_sf->name, sizeof(this_sf->name), "%s", path);
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this_sf->name[sizeof(this_sf->name) - 1] = '\0';
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this_sf->internal_xmpfile = internal;
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this_sf->xmpf_file = xmpf_file;
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return &this_sf->sf; /* pointer to STREAMFILE start = rest of the custom data follows */
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}
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