Copy the KDE 3.5 branch to branches/trinity for new KDE 3.5 features.

BUG:215923


git-svn-id: svn://anonsvn.kde.org/home/kde/branches/trinity/kdemultimedia@1054174 283d02a7-25f6-0310-bc7c-ecb5cbfe19da

1 files changed, 618 insertions, 0 deletions

diff --git a/mpg123_artsplugin/mpg123/readers.c b/mpg123_artsplugin/mpg123/readers.c
new file mode 100644
index 00000000..de5f53db
--- /dev/null
+++ b/mpg123_artsplugin/mpg123/readers.c
@@ -0,0 +1,618 @@
+#include <stdlib.h>
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+
+#include "mpg123.h"
+#include "buffer.h"
+#include "common.h"
+
+#ifdef READ_MMAP
+#include <sys/mman.h>
+#ifndef MAP_FAILED
+#define MAP_FAILED ( (void *) -1 )
+#endif
+#endif
+
+static int get_fileinfo(struct reader *,char *buf);
+static void readers_add_data(struct reader *rds,unsigned char *buf,int len);
+
+/* can hold 4096-1 = 4095 bytes! */
+#define BACKBUF_SIZE (8192)
+
+/*******************************************************************
+ * stream based operation
+ */
+static int bufdiff(struct reader *rds,int start, int end) 
+{
+  return (end >= start) ? end - start : rds->bufsize + end - start;
+}
+
+static int fullread(struct reader *rds,int fd,unsigned char *buf,int count)
+{
+    int ret,cnt=0;
+
+    while(cnt < count) {
+        int toread = count-cnt;
+        int num = bufdiff(rds,rds->bufpos,rds->bufend);
+  
+        /* if we have some data in the backbuffer .. use it first */
+        if(num > 0) {
+           int part1,part2;
+
+           if(toread > num)
+              toread = num;
+
+           part1 = rds->bufsize - rds->bufpos;
+           if(part1 > toread)
+               part1 = toread;
+           part2 = toread - part1;
+           memcpy(buf+cnt,&rds->backbuf[rds->bufpos],part1);
+           if(part2 > 0)
+             memcpy(buf+cnt+part1,&rds->backbuf[0],part2);
+           rds->bufpos += toread;
+           if(rds->bufpos >= rds->bufsize)
+               rds->bufpos -= rds->bufsize;
+           ret = toread;
+
+           if(!rds->mark)
+             rds->bufstart = rds->bufpos;
+        }
+        else {
+	  ret = read(fd,buf+cnt,toread);
+
+	  if(ret < 0)
+	    return ret;
+	  if(ret == 0)
+	    break;
+
+          if(rds->mark) {
+            readers_add_data(rds,buf+cnt,ret);
+            rds->bufpos = rds->bufend;
+          }
+
+        }
+	cnt += ret;
+    } 
+
+
+if(0)
+{
+  int i;
+  fprintf(stderr,"Fullread2 %d\n",cnt);
+  for(i=0;i<cnt;i++) {
+    fprintf(stderr,"%02x ",buf[i]);
+    if(i % 16 == 15)
+         fprintf(stderr,"\n");
+  }
+}
+
+
+    return cnt;
+}
+
+static void readers_add_data(struct reader *rds,unsigned char *buf,int len) 
+{
+  int diff,part1,part2,store = len;
+
+            if(store >= rds->bufsize)
+               store = rds->bufsize - 1;
+
+            /* check whether the new bytes would overwrite the buffer front */
+            diff = bufdiff(rds,rds->bufstart,rds->bufend);
+            if(diff+store >= rds->bufsize) {
+              fprintf(stderr,"Warning: backbuffer overfull %d %d\n",diff+store,rds->bufsize);
+              /* +1 because end should never be the same as start if the is data in the buffer */
+              rds->bufstart += diff + store + 1 - rds->bufsize;
+              if(rds->bufstart >= rds->bufsize)
+                   rds->bufstart -= rds->bufsize;
+            }
+
+            part1 = rds->bufsize - rds->bufend;
+            if(part1 > store)
+              part1 = store;
+            part2 = store - part1;
+
+            memcpy(rds->backbuf+rds->bufend,&buf[len-part1+part2],part1);
+            if(part2 > 0)
+               memcpy(rds->backbuf,&buf[len-part2],part2);
+
+            rds->bufend += store;
+            if(rds->bufend >= rds->bufsize)
+               rds->bufend -= rds->bufsize;
+
+
+}
+
+void readers_pushback_header(struct reader *rds,unsigned long aLong) 
+{
+  unsigned char buf[4];
+
+  if(rds->mark || (rds->bufpos != rds->bufend) ) {
+    rds->bufpos -= 4;
+    if(rds->bufpos < 0)
+        rds->bufpos += rds->bufsize;
+  }
+  else {
+    buf[0] = (aLong>>24) & 0xff;
+    buf[1] = (aLong>>16) & 0xff;
+    buf[2] = (aLong>>8)  & 0xff;
+    buf[3] = (aLong>>0)  & 0xff;
+  }
+  
+  readers_add_data(rds,buf,4);
+}
+
+void readers_mark_pos(struct reader *rds) {
+ /* fprintf(stderr,"M%d ",rds->bufpos); */
+  rds->bufstart = rds->bufpos;
+  rds->mark     = 1;
+}
+
+void readers_goto_mark(struct reader *rds) {
+ /*  fprintf(stderr,"G%d ",rds->bufstart); */
+  rds->mark = 0;
+  rds->bufpos = rds->bufstart;
+}
+
+
+static int default_init(struct reader *rds)
+{
+    char buf[128];
+
+    rds->mark = 0;
+    rds->bufend   = 0;
+    rds->bufstart = 0;
+    rds->bufpos   = 0;
+    rds->bufsize = BACKBUF_SIZE;
+
+    rds->backbuf = (unsigned char *) malloc(rds->bufsize);
+
+    rds->filepos = 0;
+    rds->filelen = get_fileinfo(rds,buf);
+  
+    if(rds->filelen > 0) {
+	if(!strncmp(buf,"TAG",3)) {
+	    rds->flags |= READER_ID3TAG;
+	    memcpy(rds->id3buf,buf,128);
+	}
+    }
+    return 0;
+}
+
+void stream_close(struct reader *rds)
+{
+    if (rds->flags & READER_FD_OPENED)
+        close(rds->filept);
+}
+
+/**************************************** 
+ * HACK,HACK,HACK: step back <num> frames 
+ * can only work if the 'stream' isn't a real stream but a file
+ */
+static int stream_back_bytes(struct reader *rds,int bytes)
+{
+    if(lseek(rds->filept,-bytes,SEEK_CUR) < 0)
+	return -1;
+    if(param.usebuffer)
+	buffer_resync();
+    return 0;
+}
+
+static int stream_back_frame(struct reader *rds,struct frame *fr,int num)
+{
+    long bytes;
+    int skipped;
+
+    if(!fr->firsthead)
+	return 0;
+
+    bytes = (fr->framesize+8)*(num+2);
+
+    /* Skipping back/forth requires a bit more work in buffered mode. 
+     * See mapped_back_frame(). 
+     */
+#ifndef NOXFERMEM
+    if(param.usebuffer)
+	bytes += (long)(xfermem_get_usedspace(buffermem) /
+			(buffermem->buf[0] * buffermem->buf[1]
+			 * (buffermem->buf[2] & AUDIO_FORMAT_MASK ?
+			    16.0 : 8.0 ))
+			* (tabsel_123[fr->lsf][fr->lay-1][fr->bitrate_index] << 10));
+#endif
+    /*
+      bytes += (long)(compute_buffer_offset(fr)*compute_bpf(fr));
+    */	
+    if(lseek(rds->filept,-bytes,SEEK_CUR) < 0)
+	return -1;
+
+    sync_stream(rds,fr,0xffff,&skipped);
+
+    read_frame(rds,fr);
+    read_frame(rds,fr);
+
+    if(fr->lay == 3) {
+	set_pointer(fr->sideInfoSize,512);
+    }
+
+    if(param.usebuffer)
+	buffer_resync();
+	
+    return 0;
+}
+
+static int stream_head_read(struct reader *rds,unsigned long *newhead)
+{
+    unsigned char hbuf[4];
+
+    if(fullread(rds,rds->filept,hbuf,4) != 4)
+	return FALSE;
+  
+    *newhead = ((unsigned long) hbuf[0] << 24) |
+	((unsigned long) hbuf[1] << 16) |
+	((unsigned long) hbuf[2] << 8)  |
+	(unsigned long) hbuf[3];
+  
+    return TRUE;
+}
+
+static int stream_head_shift(struct reader *rds,unsigned long *head)
+{
+    unsigned char hbuf;
+
+    if(fullread(rds,rds->filept,&hbuf,1) != 1)
+	return 0;
+    *head <<= 8;
+    *head |= hbuf;
+    *head &= 0xffffffff;
+    return 1;
+}
+
+static int stream_skip_bytes(struct reader *rds,int len)
+{
+    if (!param.usebuffer)
+  	return lseek(rds->filept,len,SEEK_CUR);
+
+    else {
+	int ret = lseek(rds->filept,len,SEEK_CUR);
+	buffer_resync();
+	return ret;
+    }
+}
+
+static int stream_read_frame_body(struct reader *rds,unsigned char *buf,
+				  int size)
+{
+    long l;
+
+    if( (l=fullread(rds,rds->filept,buf,size)) != size)
+	{
+	    if(l <= 0)
+		return 0;
+	    memset(buf+l,0,size-l);
+	}
+
+    return 1;
+}
+
+static long stream_tell(struct reader *rds)
+{
+    return lseek(rds->filept,0,SEEK_CUR);
+}
+
+static void stream_rewind(struct reader *rds)
+{
+    lseek(rds->filept,0,SEEK_SET);
+    if(param.usebuffer) 
+	buffer_resync();
+}
+
+/*
+ * returns length of a file (if filept points to a file)
+ * reads the last 128 bytes information into buffer
+ */
+static int get_fileinfo(struct reader *rds,char *buf)
+{
+    int len;
+
+    if((len=lseek(rds->filept,0,SEEK_END)) < 0) {
+	return -1;
+    }
+    if(lseek(rds->filept,-128,SEEK_END) < 0)
+	return -1;
+    if(fullread(rds,rds->filept,(unsigned char *)buf,128) != 128) {
+	return -1;
+    }
+    if(!strncmp(buf,"TAG",3)) {
+	len -= 128;
+    }
+    if(lseek(rds->filept,0,SEEK_SET) < 0)
+	return -1;
+    if(len <= 0)
+	return -1;
+    return len;
+}
+
+
+#ifdef READ_MMAP
+/*********************************************************+
+ * memory mapped operation 
+ *
+ */
+static unsigned char *mapbuf;
+static unsigned char *mappnt;
+static unsigned char *mapend;
+
+static int mapped_init(struct reader *rds) 
+{
+    long len;
+    char buf[128];
+
+    len = get_fileinfo(rds,buf);
+    if(len < 0)
+	return -1;
+
+    if(!strncmp(buf,"TAG",3)) {
+	rds->flags |= READER_ID3TAG;
+	memcpy(rds->id3buf,buf,128);
+    }
+
+    mappnt = mapbuf = (unsigned char *)
+	mmap(NULL, len, PROT_READ, MAP_SHARED , rds->filept, 0);
+    if(!mapbuf || mapbuf == MAP_FAILED)
+	return -1;
+
+    mapend = mapbuf + len;
+	
+    if(param.verbose > 1)
+	fprintf(stderr,"Using memory mapped IO for this stream.\n");
+
+    rds->filelen = len;
+    return 0;
+}
+
+static void mapped_rewind(struct reader *rds)
+{
+    mappnt = mapbuf;
+    if (param.usebuffer) 
+	buffer_resync();	
+}
+
+static void mapped_close(struct reader *rds)
+{
+    munmap((void *)mapbuf,mapend-mapbuf);
+    if (rds->flags & READER_FD_OPENED)
+	close(rds->filept);
+}
+
+static int mapped_head_read(struct reader *rds,unsigned long *newhead) 
+{
+    unsigned long nh;
+
+    if(mappnt + 4 > mapend)
+	return FALSE;
+
+    nh = (*mappnt++)  << 24;
+    nh |= (*mappnt++) << 16;
+    nh |= (*mappnt++) << 8;
+    nh |= (*mappnt++) ;
+
+    *newhead = nh;
+    return TRUE;
+}
+
+static int mapped_head_shift(struct reader *rds,unsigned long *head)
+{
+    if(mappnt + 1 > mapend)
+	return FALSE;
+    *head <<= 8;
+    *head |= *mappnt++;
+    *head &= 0xffffffff;
+    return TRUE;
+}
+
+static int mapped_skip_bytes(struct reader *rds,int len)
+{
+    if(mappnt + len > mapend)
+	return FALSE;
+    mappnt += len;
+    if (param.usebuffer)
+	buffer_resync();
+    return TRUE;
+}
+
+static int mapped_read_frame_body(struct reader *rds,unsigned char *buf,
+				  int size)
+{
+    if(size <= 0) {
+	fprintf(stderr,"Ouch. Read_frame called with size <= 0\n");
+	return FALSE;
+    }
+    if(mappnt + size > mapend)
+	return FALSE;
+    memcpy(buf,mappnt,size);
+    mappnt += size;
+
+    return TRUE;
+}
+
+static int mapped_back_bytes(struct reader *rds,int bytes)
+{
+    if( (mappnt - bytes) < mapbuf || (mappnt - bytes + 4) > mapend)
+        return -1;
+    mappnt -= bytes;
+    if(param.usebuffer)
+	buffer_resync();
+    return 0;
+}
+
+static int mapped_back_frame(struct reader *rds,struct frame *fr,int num)
+{
+    long bytes;
+    unsigned long newhead;
+
+
+    if(!firsthead)
+        return 0;
+
+    bytes = (fr->framesize+8)*(num+2);
+
+    /* Buffered mode is a bit trickier. From the size of the buffered
+     * output audio stream we have to make a guess at the number of frames
+     * this corresponds to.
+     */
+#ifndef NOXFERMEM
+    if(param.usebuffer) 
+	bytes += (long)(xfermem_get_usedspace(buffermem) /
+			(buffermem->buf[0] * buffermem->buf[1] 
+			 * (buffermem->buf[2] & AUDIO_FORMAT_MASK ?
+			    16.0 : 8.0 )) 
+			* (tabsel_123[fr->lsf][fr->lay-1][fr->bitrate_index] << 10));
+#endif
+    /*
+      bytes += (long)(compute_buffer_offset(fr)*compute_bpf(fr));  
+    */
+
+    if( (mappnt - bytes) < mapbuf || (mappnt - bytes + 4) > mapend)
+        return -1;
+    mappnt -= bytes;
+
+    newhead = (mappnt[0]<<24) + (mappnt[1]<<16) + (mappnt[2]<<8) + mappnt[3];
+    mappnt += 4;
+
+    while( (newhead & HDRCMPMASK) != (firsthead & HDRCMPMASK) ) {
+        if(mappnt + 1 > mapend)
+            return -1;
+        newhead <<= 8;
+        newhead |= *mappnt++;
+        newhead &= 0xffffffff;
+    }
+    mappnt -= 4;
+
+    read_frame(fr);
+    read_frame(fr);
+
+    if(fr->lay == 3)
+        set_pointer(fr->sideInfoSize,512);
+
+    if(param.usebuffer)
+	buffer_resync();
+    
+    return 0;
+}
+
+static long mapped_tell(struct reader *rds)
+{
+    return mappnt - mapbuf;
+}
+
+#endif
+
+/*****************************************************************
+ * read frame helper
+ */
+
+struct reader *rd;
+struct reader readers[] = {
+#ifdef READ_SYSTEM
+    { system_init,
+      NULL,	/* filled in by system_init() */
+      NULL,
+      NULL,
+      NULL,
+      NULL,
+      NULL,
+      NULL,
+      NULL } ,
+#endif
+#ifdef READ_MMAP
+    { mapped_init,
+      mapped_close,
+      mapped_head_read,
+      mapped_head_shift,
+      mapped_skip_bytes,
+      mapped_read_frame_body,
+      mapped_back_bytes,
+      mapped_back_frame,
+      mapped_tell,
+      mapped_rewind } , 
+#endif 
+    { default_init,
+      stream_close,
+      stream_head_read,
+      stream_head_shift,
+      stream_skip_bytes,
+      stream_read_frame_body,
+      stream_back_bytes,
+      stream_back_frame,
+      stream_tell,
+      stream_rewind } ,
+    { NULL, }
+};
+
+
+/* open the device to read the bit stream from it */
+
+struct reader *open_stream(const char *bs_filenam,int fd)
+{
+    int i;
+    int filept_opened = 1;
+    int filept;
+
+    if (!bs_filenam) {
+	if(fd < 0) {
+	    filept = 0;
+	    filept_opened = 0;
+	}
+	else
+	    filept = fd;
+    }
+    else if (!strncasecmp(bs_filenam, "http://", 7)) 
+	filept = http_open(bs_filenam);
+    else if (!strncasecmp(bs_filenam, "ftp://", 6))
+        filept = http_open(bs_filenam);
+
+#ifndef O_BINARY
+#define O_BINARY (0)
+#endif
+    else if ( (filept = open(bs_filenam, O_RDONLY|O_BINARY)) < 0) {
+	perror (bs_filenam);
+	return NULL;
+    }
+
+    rd = NULL;
+    for(i=0;;i++) {
+	readers[i].filelen = -1;
+	readers[i].filept  = filept;
+	readers[i].flags = 0;
+	if(filept_opened)
+	    readers[i].flags |= READER_FD_OPENED;
+	if(!readers[i].init) {
+	    fprintf(stderr,"Fatal error!\n");
+	    exit(1);
+	}
+	if(readers[i].init(readers+i) >= 0) {
+	    rd = &readers[i];
+	    break;
+	}
+    }
+
+    if(rd && rd->flags & READER_ID3TAG) {
+	print_id3_tag(rd->id3buf);
+    }
+
+    return rd;
+}
+
+
+
+
+
+
+
+
+
+
+
+