Initial revision

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@2 b3059339-0415-0410-9bf9-f77b7e298cf2

1 files changed, 489 insertions, 0 deletions

diff --git a/mp3lib/sr1.c b/mp3lib/sr1.c
new file mode 100644
index 0000000000..d1ce352d1c
--- /dev/null
+++ b/mp3lib/sr1.c
@@ -0,0 +1,489 @@
+// #define NEWBUFFERING
+//#define DEBUG_RESYNC
+
+/* 1 frame = 4608 byte PCM */
+
+#ifdef __GNUC__
+#define LOCAL static inline
+#else
+#define LOCAL static _inline
+#endif
+
+//#undef LOCAL
+//#define LOCAL
+
+#include        <stdlib.h>
+#include        <stdio.h>
+#include        <string.h>
+#include        <signal.h>
+#include        <math.h>
+
+#define real float
+// #define int long
+
+#include "mpg123.h"
+#include "huffman.h"
+#include "mp3.h"
+
+#include "d_cpu.h"
+
+//static FILE* mp3_file=NULL;
+
+int MP3_frames=0;
+int MP3_eof=0;
+int MP3_pause=0;
+int MP3_filesize=0;
+int MP3_fpos=0;      // current file position
+int MP3_framesize=0; // current framesize
+int MP3_bitrate=0;   // current bitrate
+int MP3_samplerate=0;  // current samplerate
+int MP3_resync=0;
+int MP3_channels=0;
+int MP3_bps=2;
+
+static long outscale  = 32768;
+#include "tabinit.c"
+
+extern int mplayer_audio_read(char *buf,int size);
+
+#if 1
+LOCAL int mp3_read(char *buf,int size){
+//  int len=fread(buf,1,size,mp3_file);
+  int len=mplayer_audio_read(buf,size);
+  if(len>0) MP3_fpos+=len;
+//  if(len!=size) MP3_eof=1;
+  return len;
+}
+#else
+extern int mp3_read(char *buf,int size);
+#endif
+
+//void mp3_seek(int pos){
+//  fseek(mp3_file,pos,SEEK_SET);
+//  return (MP3_fpos=ftell(mp3_file));
+//}
+
+/*       Frame reader           */
+
+#define MAXFRAMESIZE 1280
+#define MAXFRAMESIZE2 (512+MAXFRAMESIZE)
+
+static int fsizeold=0,ssize=0;
+static unsigned char bsspace[2][MAXFRAMESIZE2]; /* !!!!! */
+static unsigned char *bsbufold=bsspace[0]+512;
+static unsigned char *bsbuf=bsspace[1]+512;
+static int bsnum=0;
+
+static int bitindex;
+static unsigned char *wordpointer;
+static int bitsleft;
+
+unsigned char *pcm_sample;   /* az outbuffer CIME */
+int pcm_point = 0;           /* ez az outbuffer pozicioja */
+
+static struct frame fr;
+
+static int tabsel_123[2][3][16] = {
+   { {0,32,64,96,128,160,192,224,256,288,320,352,384,416,448,},
+     {0,32,48,56, 64, 80, 96,112,128,160,192,224,256,320,384,},
+     {0,32,40,48, 56, 64, 80, 96,112,128,160,192,224,256,320,} },
+
+   { {0,32,48,56,64,80,96,112,128,144,160,176,192,224,256,},
+     {0,8,16,24,32,40,48,56,64,80,96,112,128,144,160,},
+     {0,8,16,24,32,40,48,56,64,80,96,112,128,144,160,} }
+};
+
+static long freqs[9] = { 44100, 48000, 32000, 22050, 24000, 16000 , 11025 , 12000 , 8000 };
+
+LOCAL unsigned int getbits(short number_of_bits)
+{
+  unsigned long rval;
+//  if(MP3_frames>=7741) printf("getbits: bits=%d  bitsleft=%d  wordptr=%x\n",number_of_bits,bitsleft,wordpointer);
+  if((bitsleft-=number_of_bits)<0) return 0;
+  if(!number_of_bits) return 0;
+         rval = wordpointer[0];
+         rval <<= 8;
+         rval |= wordpointer[1];
+         rval <<= 8;
+         rval |= wordpointer[2];
+         rval <<= bitindex;
+         rval &= 0xffffff;
+         bitindex += number_of_bits;
+         rval >>= (24-number_of_bits);
+         wordpointer += (bitindex>>3);
+         bitindex &= 7;
+  return rval;
+}
+
+
+LOCAL unsigned int getbits_fast(short number_of_bits)
+{
+  unsigned long rval;
+//  if(MP3_frames>=7741) printf("getbits_fast: bits=%d  bitsleft=%d  wordptr=%x\n",number_of_bits,bitsleft,wordpointer);
+  if((bitsleft-=number_of_bits)<0) return 0;
+  if(!number_of_bits) return 0;
+   rval = wordpointer[0];
+         rval <<= 8;
+         rval |= wordpointer[1];
+         rval <<= bitindex;
+         rval &= 0xffff;
+         bitindex += number_of_bits;
+         rval >>= (16-number_of_bits);
+         wordpointer += (bitindex>>3);
+         bitindex &= 7;
+  return rval;
+}
+
+LOCAL unsigned int get1bit(void)
+{
+  unsigned char rval;
+//  if(MP3_frames>=7741) printf("get1bit: bitsleft=%d  wordptr=%x\n",bitsleft,wordpointer);
+  if((--bitsleft)<0) return 0;
+  rval = *wordpointer << bitindex;
+  bitindex++;
+  wordpointer += (bitindex>>3);
+  bitindex &= 7;
+  return ((rval>>7)&1);
+}
+
+LOCAL void set_pointer(long backstep)
+{
+//  if(backstep!=512 && backstep>fsizeold)
+//    printf("\rWarning! backstep (%d>%d)                                         \n",backstep,fsizeold);
+  wordpointer = bsbuf + ssize - backstep;
+  if (backstep) memcpy(wordpointer,bsbufold+fsizeold-backstep,backstep);
+  bitindex = 0;
+  bitsleft+=8*backstep;
+//  printf("Backstep %d  (bitsleft=%d)\n",backstep,bitsleft);
+}
+
+LOCAL int stream_head_read(unsigned char *hbuf,unsigned long *newhead){
+  if(mp3_read(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;
+}
+
+LOCAL int stream_head_shift(unsigned char *hbuf,unsigned long *head){
+  memmove (&hbuf[0], &hbuf[1], 3);
+  if(mp3_read(hbuf+3,1) != 1) return 0;
+  *head <<= 8;
+  *head |= hbuf[3];
+  *head &= 0xffffffff;
+  return 1;
+}
+
+/*
+ * decode a header and write the information
+ * into the frame structure
+ */
+LOCAL int decode_header(struct frame *fr,unsigned long newhead){
+
+    // head_check:
+    if( (newhead & 0xffe00000) != 0xffe00000)   return FALSE;
+    if( ((newhead>>12)&0xf) == 0xf)     return FALSE;
+    if( ((newhead>>10)&0x3) == 0x3 )    return FALSE;
+
+    fr->lay = 4-((newhead>>17)&3);
+//    if(fr->lay!=3) return FALSE;
+
+    if( newhead & ((long)1<<20) ) {
+      fr->lsf = (newhead & ((long)1<<19)) ? 0x0 : 0x1;
+      fr->mpeg25 = 0;
+    } else {
+      fr->lsf = 1;
+      fr->mpeg25 = 1;
+    }
+
+    if(fr->mpeg25)
+      fr->sampling_frequency = 6 + ((newhead>>10)&0x3);
+    else
+      fr->sampling_frequency = ((newhead>>10)&0x3) + (fr->lsf*3);
+
+    fr->error_protection = ((newhead>>16)&0x1)^0x1;
+    fr->bitrate_index = ((newhead>>12)&0xf);
+    fr->padding   = ((newhead>>9)&0x1);
+    fr->extension = ((newhead>>8)&0x1);
+    fr->mode      = ((newhead>>6)&0x3);
+    fr->mode_ext  = ((newhead>>4)&0x3);
+    fr->copyright = ((newhead>>3)&0x1);
+    fr->original  = ((newhead>>2)&0x1);
+    fr->emphasis  = newhead & 0x3;
+
+    MP3_channels = fr->stereo    = (fr->mode == MPG_MD_MONO) ? 1 : 2;
+
+    if(!fr->bitrate_index){
+//      fprintf(stderr,"Free format not supported.\n");
+      return FALSE;
+    }
+
+switch(fr->lay){
+  case 2:
+    MP3_bitrate=tabsel_123[fr->lsf][1][fr->bitrate_index];
+    MP3_samplerate=freqs[fr->sampling_frequency];
+    fr->framesize = (long) MP3_bitrate * 144000;
+    fr->framesize /= MP3_samplerate;
+    MP3_framesize=fr->framesize;
+    fr->framesize += fr->padding - 4;
+    break;
+  case 3:
+    if(fr->lsf)
+      ssize = (fr->stereo == 1) ? 9 : 17;
+    else
+      ssize = (fr->stereo == 1) ? 17 : 32;
+    if(fr->error_protection) ssize += 2;
+
+    MP3_bitrate=tabsel_123[fr->lsf][2][fr->bitrate_index];
+    MP3_samplerate=freqs[fr->sampling_frequency];
+    fr->framesize  = (long) MP3_bitrate * 144000;
+    fr->framesize /= MP3_samplerate<<(fr->lsf);
+    MP3_framesize=fr->framesize;
+    fr->framesize += fr->padding - 4;
+    break;
+  default:
+//    fprintf(stderr,"Sorry, unsupported layer type.\n");
+    return 0;
+}
+    if(fr->framesize<=0 || fr->framesize>MAXFRAMESIZE) return FALSE;
+
+    return 1;
+}
+
+
+LOCAL int stream_read_frame_body(int size){
+
+  /* flip/init buffer for Layer 3 */
+  bsbufold = bsbuf;
+  bsbuf = bsspace[bsnum]+512;
+  bsnum = (bsnum + 1) & 1;
+
+  if( mp3_read(bsbuf,size) != size) return 0; // broken frame
+
+  bitindex = 0;
+  wordpointer = (unsigned char *) bsbuf;
+  bitsleft=8*size;
+
+  return 1;
+}
+
+
+/*****************************************************************
+ * read next frame     return number of frames read.
+ */
+LOCAL int read_frame(struct frame *fr){
+  unsigned long newhead;
+  unsigned char hbuf[8];
+  int skipped,resyncpos;
+  int frames=0;
+
+resync:
+  skipped=MP3_fpos;
+  resyncpos=MP3_fpos;
+
+  set_pointer(512);
+  fsizeold=fr->framesize;       /* for Layer3 */
+  if(!stream_head_read(hbuf,&newhead)) return 0;
+  if(!decode_header(fr,newhead)){
+    // invalid header! try to resync stream!
+#ifdef DEBUG_RESYNC
+    printf("ReSync: searching for a valid header...  (pos=%X)\n",MP3_fpos);
+#endif
+retry1:
+    while(!decode_header(fr,newhead)){
+      if(!stream_head_shift(hbuf,&newhead)) return 0;
+    }
+    resyncpos=MP3_fpos-4;
+    // found valid header
+#ifdef DEBUG_RESYNC
+    printf("ReSync: found valid hdr at %X  fsize=%ld  ",resyncpos,fr->framesize);
+#endif
+    if(!stream_read_frame_body(fr->framesize)) return 0; // read body
+    set_pointer(512);
+    fsizeold=fr->framesize;       /* for Layer3 */
+    if(!stream_head_read(hbuf,&newhead)) return 0;
+    if(!decode_header(fr,newhead)){
+      // invalid hdr! go back...
+#ifdef DEBUG_RESYNC
+      printf("INVALID\n");
+#endif
+//      mp3_seek(resyncpos+1);
+      if(!stream_head_read(hbuf,&newhead)) return 0;
+      goto retry1;
+    }
+#ifdef DEBUG_RESYNC
+    printf("OK!\n");
+    ++frames;
+#endif
+  }
+
+  skipped=resyncpos-skipped;
+//  if(skipped && !MP3_resync) printf("\r%d bad bytes skipped  (resync at 0x%X)                          \n",skipped,resyncpos);
+
+//  printf("%8X [%08X] %d %d (%d)%s%s\n",MP3_fpos-4,newhead,fr->framesize,fr->mode,fr->mode_ext,fr->error_protection?" CRC":"",fr->padding?" PAD":"");
+
+  /* read main data into memory */
+  if(!stream_read_frame_body(fr->framesize)){
+    printf("\nBroken frame at 0x%X                                                  \n",resyncpos);
+    return 0;
+  }
+  ++frames;
+
+  if(MP3_resync){
+    MP3_resync=0;
+    if(frames==1) goto resync;
+  }
+
+  return frames;
+}
+
+#include "layer2.c"
+#include "layer3.c"
+
+/******************************************************************************/
+/*           PUBLIC FUNCTIONS                  */
+/******************************************************************************/
+
+static int tables_done_flag=0;
+
+// Init decoder tables.  Call first, once!
+void MP3_Init(){
+    _CpuID=CpuDetect();
+    _i586=ipentium();
+#ifdef HAVE_3DNOW
+    _3dnow=a3dnow();
+#endif
+
+    printf( "mp3lib: Processor ID: %x\n",_CpuID );
+    printf( "mp3lib: i586 processor %sdetected.\n",(_i586?"":"not ") );
+#ifdef HAVE_3DNOW
+    printf( "mp3lib: AMD 3dnow! extension %sdetected.\n",(a3dnow()?"":"not ") );
+#endif
+
+    make_decode_tables(outscale);
+    fr.synth=synth_1to1;
+    fr.synth_mono=synth_1to1_mono2stereo;
+    fr.down_sample=0;
+    fr.down_sample_sblimit = SBLIMIT>>(fr.down_sample);
+    init_layer2();
+    init_layer3(fr.down_sample_sblimit);
+    tables_done_flag=1;
+}
+
+#if 0
+
+void MP3_Close(){
+  MP3_eof=1;
+  if(mp3_file) fclose(mp3_file);
+  mp3_file=NULL;
+}
+
+// Open a file, init buffers. Call once per file!
+int MP3_Open(char *filename,int buffsize){
+  MP3_eof=1;   // lock decoding
+  MP3_pause=1; // lock playing
+  if(mp3_file) MP3_Close(); // close prev. file
+  MP3_frames=0;
+
+  mp3_file=fopen(filename,"rb");
+//  printf("MP3_Open: file='%s'",filename);
+//  if(!mp3_file){ printf(" not found!\n"); return 0;} else printf("Ok!\n");
+  if(!mp3_file) return 0;
+
+  MP3_filesize=MP3_PrintTAG();
+  fseek(mp3_file,0,SEEK_SET);
+
+  MP3_InitBuffers(buffsize);
+  if(!tables_done_flag) MP3_Init();
+  MP3_eof=0;  // allow decoding
+  MP3_pause=0; // allow playing
+  return MP3_filesize;
+}
+
+#endif
+
+// Read & decode a single frame. Called by sound driver.
+int MP3_DecodeFrame(unsigned char *hova,short single){
+   pcm_sample = hova;
+   pcm_point = 0;
+   if(!read_frame(&fr))return(0);
+   if(single==-2){ set_pointer(512); return(1); }
+   if(fr.error_protection) getbits(16); /* skip crc */
+   fr.single=single;
+   switch(fr.lay){
+     case 2: do_layer2(&fr,single);break;
+     case 3: do_layer3(&fr,single);break;
+   }
+//   ++MP3_frames;
+   return(pcm_point?pcm_point:2);
+}
+
+#if 0
+
+// Prints last frame header in ascii.
+void MP3_PrintHeader(){
+        static char *modes[4] = { "Stereo", "Joint-Stereo", "Dual-Channel", "Single-Channel" };
+        static char *layers[4] = { "???" , "I", "II", "III" };
+
+        printf("\rMPEG %s, Layer %s, %ld Hz %d kbit %s, BPF : %ld\n",
+                fr.mpeg25 ? "2.5" : (fr.lsf ? "2.0" : "1.0"),
+                layers[fr.lay],freqs[fr.sampling_frequency],
+    tabsel_123[fr.lsf][fr.lay-1][fr.bitrate_index],
+                modes[fr.mode],fr.framesize+4);
+        printf("Channels: %d, copyright: %s, original: %s, CRC: %s, emphasis: %d.\n\n",
+                fr.stereo,fr.copyright?"Yes":"No",
+                fr.original?"Yes":"No",fr.error_protection?"Yes":"No",
+                fr.emphasis);
+}
+
+#include "genre.h"
+
+// Read & print ID3 TAG. Do not call when playing!!!  returns filesize.
+int MP3_PrintTAG(){
+        struct id3tag {
+                char tag[3];
+                char title[30];
+                char artist[30];
+                char album[30];
+                char year[4];
+                char comment[30];
+                unsigned char genre;
+        };
+        struct id3tag tag;
+        char title[31]={0,};
+        char artist[31]={0,};
+        char album[31]={0,};
+        char year[5]={0,};
+        char comment[31]={0,};
+        char genre[31]={0,};
+  int fsize;
+  int ret;
+
+  fseek(mp3_file,0,SEEK_END);
+  fsize=ftell(mp3_file);
+  if(fseek(mp3_file,-128,SEEK_END)) return fsize;
+  ret=fread(&tag,128,1,mp3_file);
+  if(ret!=1 || tag.tag[0]!='T' || tag.tag[1]!='A' || tag.tag[2]!='G') return fsize;
+
+        strncpy(title,tag.title,30);
+        strncpy(artist,tag.artist,30);
+        strncpy(album,tag.album,30);
+        strncpy(year,tag.year,4);
+        strncpy(comment,tag.comment,30);
+
+        if ( tag.genre <= sizeof(genre_table)/sizeof(*genre_table) ) {
+                strncpy(genre, genre_table[tag.genre], 30);
+        } else {
+                strncpy(genre,"Unknown",30);
+        }
+
+//      printf("\n");
+        printf("Title  : %30s  Artist: %s\n",title,artist);
+        printf("Album  : %30s  Year  : %4s\n",album,year);
+        printf("Comment: %30s  Genre : %s\n",comment,genre);
+        printf("\n");
+  return fsize-128;
+}
+
+#endif