mirror of
https://github.com/mpv-player/mpv
synced 2024-12-29 10:32:15 +00:00
01ad22ac41
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@15168 b3059339-0415-0410-9bf9-f77b7e298cf2
592 lines
16 KiB
C
592 lines
16 KiB
C
// #define NEWBUFFERING
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//#define DEBUG_RESYNC
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/* 1 frame = 4608 byte PCM */
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#ifdef __GNUC__
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#define LOCAL static inline
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#else
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#define LOCAL static _inline
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#endif
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//#undef LOCAL
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//#define LOCAL
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <signal.h>
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#include <math.h>
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#define real float
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// #define int long
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#include "mpg123.h"
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#include "huffman.h"
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#include "mp3.h"
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#include "bswap.h"
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#include "../cpudetect.h"
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//#include "../liba52/mm_accel.h"
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#include "../mp_msg.h"
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#include "fastmemcpy.h"
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#ifdef ARCH_X86
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#define CAN_COMPILE_X86_ASM
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#endif
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//static FILE* mp3_file=NULL;
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int MP3_frames=0;
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int MP3_eof=0;
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int MP3_pause=0;
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int MP3_filesize=0;
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int MP3_fpos=0; // current file position
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int MP3_framesize=0; // current framesize
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int MP3_bitrate=0; // current bitrate
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int MP3_samplerate=0; // current samplerate
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int MP3_resync=0;
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int MP3_channels=0;
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int MP3_bps=2;
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static long outscale = 32768;
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#include "tabinit.c"
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#if 1
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extern int mplayer_audio_read(char *buf,int size);
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LOCAL int mp3_read(char *buf,int size){
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// int len=fread(buf,1,size,mp3_file);
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int len=mplayer_audio_read(buf,size);
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if(len>0) MP3_fpos+=len;
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// if(len!=size) MP3_eof=1;
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return len;
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}
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#else
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extern int mp3_read(char *buf,int size);
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#endif
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/*
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* Modified for use with MPlayer, for details see the CVS changelog at
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* http://www.mplayerhq.hu/cgi-bin/cvsweb.cgi/main/
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* $Id$
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*/
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//void mp3_seek(int pos){
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// fseek(mp3_file,pos,SEEK_SET);
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// return (MP3_fpos=ftell(mp3_file));
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//}
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/* Frame reader */
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#define MAXFRAMESIZE 1280
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#define MAXFRAMESIZE2 (512+MAXFRAMESIZE)
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static int fsizeold=0,ssize=0;
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static unsigned char bsspace[2][MAXFRAMESIZE2]; /* !!!!! */
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static unsigned char *bsbufold=bsspace[0]+512;
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static unsigned char *bsbuf=bsspace[1]+512;
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static int bsnum=0;
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static int bitindex;
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static unsigned char *wordpointer;
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static int bitsleft;
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static unsigned char *pcm_sample; /* outbuffer address */
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static int pcm_point = 0; /* outbuffer offset */
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static struct frame fr;
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static int tabsel_123[2][3][16] = {
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{ {0,32,64,96,128,160,192,224,256,288,320,352,384,416,448,},
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{0,32,48,56, 64, 80, 96,112,128,160,192,224,256,320,384,},
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{0,32,40,48, 56, 64, 80, 96,112,128,160,192,224,256,320,} },
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{ {0,32,48,56,64,80,96,112,128,144,160,176,192,224,256,},
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{0,8,16,24,32,40,48,56,64,80,96,112,128,144,160,},
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{0,8,16,24,32,40,48,56,64,80,96,112,128,144,160,} }
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};
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static long freqs[9] = { 44100, 48000, 32000, 22050, 24000, 16000 , 11025 , 12000 , 8000 };
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LOCAL unsigned int getbits(short number_of_bits)
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{
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unsigned long rval;
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// if(MP3_frames>=7741) printf("getbits: bits=%d bitsleft=%d wordptr=%x\n",number_of_bits,bitsleft,wordpointer);
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if((bitsleft-=number_of_bits)<0) return 0;
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if(!number_of_bits) return 0;
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rval = wordpointer[0];
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rval <<= 8;
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rval |= wordpointer[1];
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rval <<= 8;
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rval |= wordpointer[2];
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rval <<= bitindex;
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rval &= 0xffffff;
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bitindex += number_of_bits;
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rval >>= (24-number_of_bits);
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wordpointer += (bitindex>>3);
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bitindex &= 7;
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return rval;
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}
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LOCAL unsigned int getbits_fast(short number_of_bits)
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{
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unsigned long rval;
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// if(MP3_frames>=7741) printf("getbits_fast: bits=%d bitsleft=%d wordptr=%x\n",number_of_bits,bitsleft,wordpointer);
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if((bitsleft-=number_of_bits)<0) return 0;
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if(!number_of_bits) return 0;
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#if defined(CAN_COMPILE_X86_ASM)
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rval = bswap_16(*((unsigned short *)wordpointer));
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#else
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/*
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* we may not be able to address unaligned 16-bit data on non-x86 cpus.
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* Fall back to some portable code.
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*/
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rval = wordpointer[0] << 8 | wordpointer[1];
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#endif
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rval <<= bitindex;
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rval &= 0xffff;
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bitindex += number_of_bits;
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rval >>= (16-number_of_bits);
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wordpointer += (bitindex>>3);
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bitindex &= 7;
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return rval;
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}
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LOCAL unsigned int get1bit(void)
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{
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unsigned char rval;
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// if(MP3_frames>=7741) printf("get1bit: bitsleft=%d wordptr=%x\n",bitsleft,wordpointer);
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if((--bitsleft)<0) return 0;
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rval = *wordpointer << bitindex;
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bitindex++;
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wordpointer += (bitindex>>3);
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bitindex &= 7;
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return ((rval>>7)&1);
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}
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LOCAL void set_pointer(long backstep)
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{
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// if(backstep!=512 && backstep>fsizeold)
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// printf("\rWarning! backstep (%d>%d) \n",backstep,fsizeold);
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wordpointer = bsbuf + ssize - backstep;
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if (backstep) memcpy(wordpointer,bsbufold+fsizeold-backstep,backstep);
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bitindex = 0;
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bitsleft+=8*backstep;
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// printf("Backstep %d (bitsleft=%d)\n",backstep,bitsleft);
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}
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LOCAL int stream_head_read(unsigned char *hbuf,unsigned long *newhead){
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if(mp3_read(hbuf,4) != 4) return FALSE;
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#if defined(CAN_COMPILE_X86_ASM)
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*newhead = bswap_32(*((unsigned long *)hbuf));
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#else
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/*
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* we may not be able to address unaligned 32-bit data on non-x86 cpus.
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* Fall back to some portable code.
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*/
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*newhead =
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hbuf[0] << 24 |
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hbuf[1] << 16 |
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hbuf[2] << 8 |
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hbuf[3];
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#endif
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return TRUE;
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}
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LOCAL int stream_head_shift(unsigned char *hbuf,unsigned long *head){
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*((unsigned long *)hbuf) >>= 8;
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if(mp3_read(hbuf+3,1) != 1) return 0;
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*head <<= 8;
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*head |= hbuf[3];
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return 1;
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}
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/*
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* decode a header and write the information
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* into the frame structure
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*/
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LOCAL int decode_header(struct frame *fr,unsigned long newhead){
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// head_check:
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if( (newhead & 0xffe00000) != 0xffe00000 ||
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(newhead & 0x0000fc00) == 0x0000fc00) return FALSE;
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fr->lay = 4-((newhead>>17)&3);
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// if(fr->lay!=3) return FALSE;
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if( newhead & ((long)1<<20) ) {
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fr->lsf = (newhead & ((long)1<<19)) ? 0x0 : 0x1;
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fr->mpeg25 = 0;
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} else {
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fr->lsf = 1;
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fr->mpeg25 = 1;
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}
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if(fr->mpeg25)
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fr->sampling_frequency = 6 + ((newhead>>10)&0x3);
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else
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fr->sampling_frequency = ((newhead>>10)&0x3) + (fr->lsf*3);
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if(fr->sampling_frequency>8) return FALSE; // valid: 0..8
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fr->error_protection = ((newhead>>16)&0x1)^0x1;
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fr->bitrate_index = ((newhead>>12)&0xf);
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fr->padding = ((newhead>>9)&0x1);
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fr->extension = ((newhead>>8)&0x1);
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fr->mode = ((newhead>>6)&0x3);
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fr->mode_ext = ((newhead>>4)&0x3);
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fr->copyright = ((newhead>>3)&0x1);
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fr->original = ((newhead>>2)&0x1);
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fr->emphasis = newhead & 0x3;
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MP3_channels = fr->stereo = (fr->mode == MPG_MD_MONO) ? 1 : 2;
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if(!fr->bitrate_index){
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// fprintf(stderr,"Free format not supported.\n");
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return FALSE;
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}
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switch(fr->lay){
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case 2:
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MP3_bitrate=tabsel_123[fr->lsf][1][fr->bitrate_index];
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MP3_samplerate=freqs[fr->sampling_frequency];
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fr->framesize = (long) MP3_bitrate * 144000;
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fr->framesize /= MP3_samplerate;
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MP3_framesize=fr->framesize;
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fr->framesize += fr->padding - 4;
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break;
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case 3:
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if(fr->lsf)
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ssize = (fr->stereo == 1) ? 9 : 17;
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else
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ssize = (fr->stereo == 1) ? 17 : 32;
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if(fr->error_protection) ssize += 2;
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MP3_bitrate=tabsel_123[fr->lsf][2][fr->bitrate_index];
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MP3_samplerate=freqs[fr->sampling_frequency];
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fr->framesize = (long) MP3_bitrate * 144000;
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fr->framesize /= MP3_samplerate<<(fr->lsf);
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MP3_framesize=fr->framesize;
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fr->framesize += fr->padding - 4;
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break;
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case 1:
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// fr->jsbound = (fr->mode == MPG_MD_JOINT_STEREO) ? (fr->mode_ext<<2)+4 : 32;
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MP3_bitrate=tabsel_123[fr->lsf][0][fr->bitrate_index];
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MP3_samplerate=freqs[fr->sampling_frequency];
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fr->framesize = (long) MP3_bitrate * 12000;
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fr->framesize /= MP3_samplerate;
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MP3_framesize = ((fr->framesize+fr->padding)<<2);
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fr->framesize = MP3_framesize-4;
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// printf("framesize=%d\n",fr->framesize);
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break;
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default:
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MP3_framesize=fr->framesize=0;
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// fprintf(stderr,"Sorry, unsupported layer type.\n");
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return 0;
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}
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if(fr->framesize<=0 || fr->framesize>MAXFRAMESIZE) return FALSE;
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return 1;
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}
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LOCAL int stream_read_frame_body(int size){
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/* flip/init buffer for Layer 3 */
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bsbufold = bsbuf;
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bsbuf = bsspace[bsnum]+512;
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bsnum = (bsnum + 1) & 1;
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if( mp3_read(bsbuf,size) != size) return 0; // broken frame
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bitindex = 0;
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wordpointer = (unsigned char *) bsbuf;
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bitsleft=8*size;
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return 1;
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}
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/*****************************************************************
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* read next frame return number of frames read.
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*/
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LOCAL int read_frame(struct frame *fr){
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unsigned long newhead;
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unsigned char hbuf[8];
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int skipped,resyncpos;
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int frames=0;
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resync:
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skipped=MP3_fpos;
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resyncpos=MP3_fpos;
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set_pointer(512);
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fsizeold=fr->framesize; /* for Layer3 */
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if(!stream_head_read(hbuf,&newhead)) return 0;
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if(!decode_header(fr,newhead)){
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// invalid header! try to resync stream!
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#ifdef DEBUG_RESYNC
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printf("ReSync: searching for a valid header... (pos=%X)\n",MP3_fpos);
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#endif
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retry1:
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while(!decode_header(fr,newhead)){
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if(!stream_head_shift(hbuf,&newhead)) return 0;
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}
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resyncpos=MP3_fpos-4;
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// found valid header
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#ifdef DEBUG_RESYNC
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printf("ReSync: found valid hdr at %X fsize=%ld ",resyncpos,fr->framesize);
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#endif
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if(!stream_read_frame_body(fr->framesize)) return 0; // read body
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set_pointer(512);
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fsizeold=fr->framesize; /* for Layer3 */
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if(!stream_head_read(hbuf,&newhead)) return 0;
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if(!decode_header(fr,newhead)){
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// invalid hdr! go back...
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#ifdef DEBUG_RESYNC
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printf("INVALID\n");
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#endif
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// mp3_seek(resyncpos+1);
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if(!stream_head_read(hbuf,&newhead)) return 0;
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goto retry1;
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}
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#ifdef DEBUG_RESYNC
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printf("OK!\n");
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++frames;
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#endif
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}
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skipped=resyncpos-skipped;
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// if(skipped && !MP3_resync) printf("\r%d bad bytes skipped (resync at 0x%X) \n",skipped,resyncpos);
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// 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":"");
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/* read main data into memory */
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if(!stream_read_frame_body(fr->framesize)){
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printf("\nBroken frame at 0x%X \n",resyncpos);
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return 0;
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}
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++frames;
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if(MP3_resync){
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MP3_resync=0;
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if(frames==1) goto resync;
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}
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return frames;
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}
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static int _has_mmx = 0; // used by layer2.c, layer3.c to pre-scale coeffs
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#include "layer2.c"
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#include "layer3.c"
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#include "layer1.c"
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/******************************************************************************/
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/* PUBLIC FUNCTIONS */
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/******************************************************************************/
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/* It's hidden from gcc in assembler */
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extern void dct64_MMX(real *, real *, real *);
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extern void dct64_MMX_3dnow(real *, real *, real *);
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extern void dct64_MMX_3dnowex(real *, real *, real *);
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void (*dct64_MMX_func)(real *, real *, real *);
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#include "../cpudetect.h"
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// Init decoder tables. Call first, once!
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#ifdef USE_FAKE_MONO
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void MP3_Init(int fakemono){
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#else
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void MP3_Init(){
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#endif
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//gCpuCaps.hasMMX=gCpuCaps.hasMMX2=gCpuCaps.hasSSE=0; // for testing!
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_has_mmx = 0;
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dct36_func = dct36;
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make_decode_tables(outscale);
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#ifdef CAN_COMPILE_X86_ASM
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if (gCpuCaps.hasMMX)
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{
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_has_mmx = 1;
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make_decode_tables_MMX(outscale);
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mp_msg(MSGT_DECAUDIO,MSGL_V,"mp3lib: made decode tables with MMX optimization\n");
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synth_func = synth_1to1_MMX;
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}
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if (gCpuCaps.has3DNowExt)
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{
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dct36_func=dct36_3dnowex;
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dct64_MMX_func= (gCpuCaps.hasMMX2) ? dct64_MMX_3dnowex : dct64_MMX_3dnow;
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mp_msg(MSGT_DECAUDIO,MSGL_V,"mp3lib: using 3DNow!Ex optimized decore!\n");
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}
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else
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if (gCpuCaps.has3DNow)
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{
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dct36_func = dct36_3dnow;
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dct64_MMX_func = dct64_MMX_3dnow;
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mp_msg(MSGT_DECAUDIO,MSGL_V,"mp3lib: using 3DNow! optimized decore!\n");
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}
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else
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if (gCpuCaps.hasMMX)
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{
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dct64_MMX_func = dct64_MMX;
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mp_msg(MSGT_DECAUDIO,MSGL_V,"mp3lib: using MMX optimized decore!\n");
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}
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else
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if (gCpuCaps.cpuType >= CPUTYPE_I586)
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{
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synth_func = synth_1to1_pent;
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mp_msg(MSGT_DECAUDIO,MSGL_V,"mp3lib: using Pentium optimized decore!\n");
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}
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else
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#endif
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{
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synth_func = NULL; /* use default c version */
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mp_msg(MSGT_DECAUDIO,MSGL_V,"mp3lib: using generic C decore!\n");
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}
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#ifdef USE_FAKE_MONO
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if (fakemono == 1)
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fr.synth=synth_1to1_l;
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else if (fakemono == 2)
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fr.synth=synth_1to1_r;
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else
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fr.synth=synth_1to1;
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#else
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fr.synth=synth_1to1;
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#endif
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fr.synth_mono=synth_1to1_mono2stereo;
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fr.down_sample=0;
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fr.down_sample_sblimit = SBLIMIT>>(fr.down_sample);
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init_layer2();
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init_layer3(fr.down_sample_sblimit);
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mp_msg(MSGT_DECAUDIO,MSGL_V,"MP3lib: init layer2&3 finished, tables done\n");
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}
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#if 0
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void MP3_Close(){
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MP3_eof=1;
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if(mp3_file) fclose(mp3_file);
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mp3_file=NULL;
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}
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// Open a file, init buffers. Call once per file!
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int MP3_Open(char *filename,int buffsize){
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MP3_eof=1; // lock decoding
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|
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;
|
|
case 1: do_layer1(&fr,single);break;
|
|
default:
|
|
return 0; // unsupported
|
|
}
|
|
// ++MP3_frames;
|
|
return(pcm_point?pcm_point:2);
|
|
}
|
|
|
|
// 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" };
|
|
|
|
mp_msg(MSGT_DECAUDIO,MSGL_V,"\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);
|
|
mp_msg(MSGT_DECAUDIO,MSGL_V,"Channels: %d, copyright: %s, original: %s, CRC: %s, emphasis: %d\n",
|
|
fr.stereo,fr.copyright?"Yes":"No",
|
|
fr.original?"Yes":"No",fr.error_protection?"Yes":"No",
|
|
fr.emphasis);
|
|
}
|
|
|
|
#if 0
|
|
#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
|