368 lines
8.3 KiB
Objective-C
Executable File
368 lines
8.3 KiB
Objective-C
Executable File
//
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// DumbFile.m
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// Cog
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//
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// Created by Vincent Spader on 5/29/06.
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// Copyright 2006 Vincent Spader. All rights reserved.
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//
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#define _USE_SSE 1
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#import "DumbDecoder.h"
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#import "umx.h"
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#import "j2b.h"
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#import "mo3.h"
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#import "Logging.h"
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#import "PlaylistController.h"
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@implementation DumbDecoder
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struct MEMANDFREEFILE
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{
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char *ptr, *ptr_begin;
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long left, size;
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int is_mo3;
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};
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static int dumb_maffile_skip(void *f, long n)
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{
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struct MEMANDFREEFILE *m = f;
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if (n > m->left) return -1;
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m->ptr += n;
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m->left -= n;
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return 0;
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}
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static int dumb_maffile_getc(void *f)
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{
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struct MEMANDFREEFILE *m = f;
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if (m->left <= 0) return -1;
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m->left--;
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return *(const unsigned char *)m->ptr++;
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}
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static long dumb_maffile_getnc(char *ptr, long n, void *f)
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{
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struct MEMANDFREEFILE *m = f;
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if (n > m->left) n = m->left;
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memcpy(ptr, m->ptr, n);
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m->ptr += n;
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m->left -= n;
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return n;
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}
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static void dumb_maffile_close(void *f)
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{
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struct MEMANDFREEFILE *m = f;
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if (m->is_mo3) freeMo3(m->ptr_begin);
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else free(m->ptr_begin);
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free(f);
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}
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static int dumb_maffile_seek(void *f, long n)
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{
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struct MEMANDFREEFILE *m = f;
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m->ptr = m->ptr_begin + n;
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m->left = m->size - n;
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return 0;
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}
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static long dumb_maffile_get_size(void *f)
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{
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struct MEMANDFREEFILE *m = f;
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return m->size;
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}
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static const DUMBFILE_SYSTEM maffile_dfs = {
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NULL,
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&dumb_maffile_skip,
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&dumb_maffile_getc,
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&dumb_maffile_getnc,
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&dumb_maffile_close,
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&dumb_maffile_seek,
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&dumb_maffile_get_size
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};
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DUMBFILE *dumbfile_open_memory_and_free(char *data, long size)
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{
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int is_mo3 = 0;
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char * try_data = unpackMo3( data, &size );
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if ( try_data ) {
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free( data );
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data = try_data;
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is_mo3 = 1;
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}
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else {
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try_data = unpackUmx( data, &size );
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if ( try_data ) {
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free( data );
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data = try_data;
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}
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else {
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try_data = unpackJ2b( data, &size );
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if ( try_data ) {
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free( data );
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data = try_data;
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}
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}
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}
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struct MEMANDFREEFILE *m = malloc(sizeof(*m));
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if (!m) return NULL;
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m->ptr_begin = data;
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m->ptr = data;
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m->left = size;
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m->size = size;
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m->is_mo3 = is_mo3;
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return dumbfile_open_ex(m, &maffile_dfs);
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}
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+ (void)initialize
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{
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if (self == [DumbDecoder class])
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{
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// do this here so we don't have to wait on it later
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_dumb_init_cubic();
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_dumb_init_sse();
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}
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}
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int callbackLoop(void *data)
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{
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long * loops = (long *) data;
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++ *loops;
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return 0;
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}
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- (BOOL)open:(id<CogSource>)s
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{
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[self setSource:s];
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[source seek:0 whence:SEEK_END];
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long size = [source tell];
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[source seek:0 whence:SEEK_SET];
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void * data = malloc(size);
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[source read:data amount:size];
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DUMBFILE * df = dumbfile_open_memory_and_free( data, size );
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if (!df)
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{
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ALog(@"Open failed for file: %@", [[s url] absoluteString]);
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return NO;
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}
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int subsong = 0;
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int startOrder = 0;
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NSURL * url = [s url];
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int track_num;
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if ([[url fragment] length] == 0)
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track_num = 0;
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else
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track_num = [[url fragment] intValue];
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if ( dumb_get_psm_subsong_count( df ) )
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subsong = track_num;
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else
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startOrder = track_num;
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dumbfile_seek( df, 0, SEEK_SET );
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NSString *ext = [[[[s url] path] pathExtension] lowercaseString];
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duh = dumb_read_any(df, [ext isEqualToString:@"mod"] ? 0 : 1, subsong);
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if (!duh)
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{
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ALog(@"Failed to create duh");
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dumbfile_close(df);
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return NO;
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}
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dumbfile_close(df);
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length = dumb_it_build_checkpoints( duh_get_it_sigdata( duh ), startOrder );
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dsr = duh_start_sigrenderer(duh, 0, 2 /* stereo */, startOrder);
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if (!dsr)
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{
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ALog(@"Failed to create dsr");
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return NO;
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}
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DUMB_IT_SIGRENDERER * itsr = duh_get_it_sigrenderer( dsr );
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int resampling_int = -1;
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NSString * resampling = [[NSUserDefaults standardUserDefaults] stringForKey:@"resampling"];
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if ([resampling isEqualToString:@"zoh"])
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resampling_int = 0;
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else if ([resampling isEqualToString:@"blep"])
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resampling_int = 1;
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else if ([resampling isEqualToString:@"linear"])
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resampling_int = 2;
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else if ([resampling isEqualToString:@"blam"])
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resampling_int = 3;
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else if ([resampling isEqualToString:@"cubic"])
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resampling_int = 4;
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else if ([resampling isEqualToString:@"sinc"])
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resampling_int = 5;
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dumb_it_set_resampling_quality( itsr, resampling_int );
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dumb_it_set_ramp_style(itsr, 2);
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dumb_it_set_loop_callback( itsr, callbackLoop, &loops);
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dumb_it_set_xm_speed_zero_callback( itsr, dumb_it_callback_terminate, 0);
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dumb_it_set_global_volume_zero_callback( itsr, dumb_it_callback_terminate, 0);
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loops = 0;
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fadeTotal = fadeRemain = 44100 * 8;
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sampptr = allocate_sample_buffer(2, 1024);
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[self willChangeValueForKey:@"properties"];
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[self didChangeValueForKey:@"properties"];
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return YES;
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}
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- (NSDictionary *)properties
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{
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return [NSDictionary dictionaryWithObjectsAndKeys:
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[NSNumber numberWithInt:0], @"bitrate",
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[NSNumber numberWithFloat:44100], @"sampleRate",
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[NSNumber numberWithDouble:((length / 65.536f)*44.1000)], @"totalFrames",
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[NSNumber numberWithInt:32], @"bitsPerSample", //Samples are short
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[NSNumber numberWithBool:YES], @"floatingPoint",
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[NSNumber numberWithInt:2], @"channels", //output from gme_play is in stereo
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[NSNumber numberWithBool:[source seekable]], @"seekable",
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@"host", @"endian",
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nil];
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}
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- (int)readAudio:(void *)buf frames:(UInt32)frames
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{
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int total = 0;
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while ( total < frames ) {
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int framesToRender = 1024;
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if ( framesToRender > frames )
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framesToRender = frames;
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dumb_silence( sampptr[0], framesToRender * 2 );
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int rendered = duh_sigrenderer_generate_samples( dsr, 1.0, 65536.0f / 44100.0f, framesToRender, sampptr );
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if (rendered <= 0)
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break;
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for ( int i = 0; i < rendered * 2; i++ ) {
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const float scale = 1.0 / 0x800000;
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((float *)buf)[(total * 2) + i] = (float)sampptr[0][i] * scale;
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}
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if ( !IsRepeatOneSet() && loops >= 2 ) {
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float * sampleBuf = ( float * ) buf + total * 2;
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long fadeEnd = fadeRemain - rendered;
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if ( fadeEnd < 0 )
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fadeEnd = 0;
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float fadePosf = (float)fadeRemain / fadeTotal;
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const float fadeStep = 1.0 / fadeTotal;
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for ( long fadePos = fadeRemain; fadePos > fadeEnd; --fadePos, fadePosf -= fadeStep ) {
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long offset = (fadeRemain - fadePos) * 2;
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float sampleLeft = sampleBuf[ offset + 0 ];
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float sampleRight = sampleBuf[ offset + 1 ];
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sampleLeft *= fadePosf;
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sampleRight *= fadePosf;
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sampleBuf[ offset + 0 ] = sampleLeft;
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sampleBuf[ offset + 1 ] = sampleRight;
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}
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rendered = fadeRemain - fadeEnd;
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fadeRemain = fadeEnd;
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}
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total += rendered;
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if ( rendered < framesToRender )
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break;
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}
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return total;
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}
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- (long)seek:(long)frame
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{
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double pos = (double)duh_sigrenderer_get_position(dsr) / 65.536f;
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double seekPos = frame/44.100;
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if (seekPos < pos) {
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//Reset. Dumb cannot seek backwards. It's dumb.
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[self cleanUp];
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[source seek:0 whence:SEEK_SET];
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[self open:source];
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pos = 0.0;
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}
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int numSamples = (seekPos - pos)/1000 * 44100;
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duh_sigrenderer_generate_samples(dsr, 1.0f, 65536.0f / 44100.0f, numSamples, NULL);
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return frame;
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}
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- (void)cleanUp
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{
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if (sampptr) {
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destroy_sample_buffer(sampptr);
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sampptr = NULL;
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}
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if (dsr) {
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duh_end_sigrenderer(dsr);
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dsr = NULL;
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}
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if (duh) {
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unload_duh(duh);
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duh = NULL;
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}
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}
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- (void)close
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{
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[self cleanUp];
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if (source) {
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[source close];
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[self setSource:nil];
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}
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}
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- (void)setSource:(id<CogSource>)s
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{
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source = s;
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}
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- (id<CogSource>)source
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{
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return source;
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}
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+ (NSArray *)fileTypes
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{
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return [NSArray arrayWithObjects:@"it", @"itz", @"xm", @"xmz", @"s3m", @"s3z", @"mod", @"mdz", @"stm", @"stz", @"ptm", @"mtm", @"669", @"psm", @"am", @"j2b", @"dsm", @"amf", @"okt", @"okta", @"umx", @"mo3", nil];
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}
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+ (NSArray *)mimeTypes
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{
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return [NSArray arrayWithObjects:@"audio/x-it", @"audio/x-xm", @"audio/x-s3m", @"audio/x-mod", nil];
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}
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+ (float)priority
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{
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return 1.0;
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}
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@end
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