2755ce5e64
It was about time to rewrite this anyway. Now adapted to the new public interface API. Signed-off-by: Christopher Snowhill <kode54@gmail.com>
134 lines
3.4 KiB
Objective-C
134 lines
3.4 KiB
Objective-C
//
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// VGMInterface.m
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// VGMStream
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//
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// Created by Christopher Snowhill on 9/1/17.
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// Copyright 2017 __LoSnoCo__. All rights reserved.
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//
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#import "VGMInterface.h"
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#import "Plugin.h"
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#import "Logging.h"
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static void log_callback(int level, const char* str) {
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ALog(@"%s", str);
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}
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void register_log_callback() {
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libvgmstream_set_log(LIBVGMSTREAM_LOG_LEVEL_ALL, &log_callback);
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}
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typedef struct {
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void* infile;
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int64_t offset, file_size;
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char name[0x4000];
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} vfs_priv_t;
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static size_t vfs_read(void* user_data, uint8_t* dst, int64_t offset, int length) {
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vfs_priv_t* priv = (vfs_priv_t*)user_data;
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size_t read_total = 0;
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NSObject* _file = (__bridge NSObject*)(priv->infile);
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id<CogSource> __unsafe_unretained file = (id)_file;
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if(!dst || length <= 0 || offset < 0)
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return 0;
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if(priv->offset != offset) {
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BOOL ok = offset <= priv->file_size && [file seek:offset whence:SEEK_SET];
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if(!ok)
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return 0;
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priv->offset = offset;
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}
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size_t bytes_read = [file read:dst amount:length];
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priv->offset += bytes_read;
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return bytes_read;
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}
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static size_t vfs_get_size(void* user_data) {
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vfs_priv_t* priv = (vfs_priv_t*)user_data;
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return priv->file_size;
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}
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static const char* vfs_get_name(void* user_data) {
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vfs_priv_t* priv = (vfs_priv_t*)user_data;
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return priv->name;
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}
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static libstreamfile_t* vfs_open(void* user_data, const char* filename) {
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if(!filename)
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return NULL;
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return open_vfs(filename);
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}
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static void vfs_close(libstreamfile_t* libsf) {
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if(libsf->user_data) {
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vfs_priv_t* priv = (vfs_priv_t*)libsf->user_data;
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CFBridgingRelease(priv->infile);
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}
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free(libsf);
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}
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static libstreamfile_t* open_vfs_by_cogsource(id<CogSource> file, const char* path) {
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vfs_priv_t* priv = NULL;
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libstreamfile_t* libsf = (libstreamfile_t*)calloc(1, sizeof(libstreamfile_t));
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if(!libsf) return NULL;
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libsf->read = (int (*)(void*, uint8_t*, int64_t, int)) vfs_read;
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libsf->get_size = (int64_t (*)(void*)) vfs_get_size;
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libsf->get_name = (const char* (*)(void*)) vfs_get_name;
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libsf->open = (libstreamfile_t* (*)(void*, const char* const)) vfs_open;
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libsf->close = (void (*)(libstreamfile_t*)) vfs_close;
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libsf->user_data = (vfs_priv_t*)calloc(1, sizeof(vfs_priv_t));
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if(!libsf->user_data) goto fail;
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priv = (vfs_priv_t*)libsf->user_data;
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priv->infile = CFBridgingRetain(file);
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priv->offset = 0;
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strncpy(priv->name, path, sizeof(priv->name));
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priv->name[sizeof(priv->name) - 1] = '\0';
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if(![file seekable]) {
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goto fail;
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}
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[file seek:0 whence:SEEK_END];
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priv->file_size = [file tell];
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[file seek:0 whence:SEEK_SET];
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return libsf;
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fail:
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vfs_close(libsf);
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return NULL;
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}
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libstreamfile_t* open_vfs(const char* path) {
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NSString* urlString = [NSString stringWithUTF8String:path];
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NSURL* url = [NSURL URLWithDataRepresentation:[urlString dataUsingEncoding:NSUTF8StringEncoding] relativeToURL:nil];
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if([url fragment]) {
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// .TXTP fragments need an override here
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NSString* frag = [url fragment];
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NSUInteger len = [frag length];
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if(len > 5 && [[frag substringFromIndex:len - 5] isEqualToString:@".txtp"]) {
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urlString = [urlString stringByReplacingOccurrencesOfString:@"#" withString:@"%23"];
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url = [NSURL URLWithDataRepresentation:[urlString dataUsingEncoding:NSUTF8StringEncoding] relativeToURL:nil];
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}
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}
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id audioSourceClass = NSClassFromString(@"AudioSource");
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id<CogSource> infile = [audioSourceClass audioSourceForURL:url];
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if(![infile open:url]) {
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return NULL;
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}
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return open_vfs_by_cogsource(infile, path);
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}
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