diff options
Diffstat (limited to 'demux/mp3_hdr.c')
-rw-r--r-- | demux/mp3_hdr.c | 144 |
1 files changed, 0 insertions, 144 deletions
diff --git a/demux/mp3_hdr.c b/demux/mp3_hdr.c deleted file mode 100644 index 27a02368da..0000000000 --- a/demux/mp3_hdr.c +++ /dev/null @@ -1,144 +0,0 @@ -/* - * This file is part of MPlayer. - * - * MPlayer is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * MPlayer is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License along - * with MPlayer; if not, write to the Free Software Foundation, Inc., - * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. - */ - -#include <stdio.h> - -#include "config.h" -#include "mp3_hdr.h" -#include "core/mp_msg.h" - -//----------------------- mp3 audio frame header parser ----------------------- - -static int tabsel_123[2][3][16] = { - { {0,32,64,96,128,160,192,224,256,288,320,352,384,416,448,0}, - {0,32,48,56, 64, 80, 96,112,128,160,192,224,256,320,384,0}, - {0,32,40,48, 56, 64, 80, 96,112,128,160,192,224,256,320,0} }, - - { {0,32,48,56,64,80,96,112,128,144,160,176,192,224,256,0}, - {0,8,16,24,32,40,48,56,64,80,96,112,128,144,160,0}, - {0,8,16,24,32,40,48,56,64,80,96,112,128,144,160,0} } -}; - -static long freqs[9] = { 44100, 48000, 32000, // MPEG 1.0 - 22050, 24000, 16000, // MPEG 2.0 - 11025, 12000, 8000}; // MPEG 2.5 - -/* - * return frame size or -1 (bad frame) - */ -int mp_get_mp3_header(unsigned char* hbuf,int* chans, int* srate, int* spf, int* mpa_layer, int* br){ - int stereo,ssize,lsf,framesize,padding,bitrate_index,sampling_frequency, divisor; - int bitrate; - int layer, mult[3] = { 12000, 144000, 144000 }; - unsigned long newhead = - hbuf[0] << 24 | - hbuf[1] << 16 | - hbuf[2] << 8 | - hbuf[3]; - -// printf("head=0x%08X\n",newhead); - - // head_check: - if( (newhead & 0xffe00000) != 0xffe00000 ){ - mp_msg(MSGT_DEMUXER,MSGL_DBG2,"head_check failed\n"); - return -1; - } - - layer = 4-((newhead>>17)&3); - if(layer==4){ - mp_msg(MSGT_DEMUXER,MSGL_DBG2,"not layer-1/2/3\n"); - return -1; - } - - sampling_frequency = ((newhead>>10)&0x3); // valid: 0..2 - if(sampling_frequency==3){ - mp_msg(MSGT_DEMUXER,MSGL_DBG2,"invalid sampling_frequency\n"); - return -1; - } - - if( newhead & ((long)1<<20) ) { - // MPEG 1.0 (lsf==0) or MPEG 2.0 (lsf==1) - lsf = (newhead & ((long)1<<19)) ? 0x0 : 0x1; - sampling_frequency += (lsf*3); - } else { - // MPEG 2.5 - lsf = 1; - sampling_frequency += 6; - } - -// crc = ((newhead>>16)&0x1)^0x1; - bitrate_index = ((newhead>>12)&0xf); // valid: 1..14 - 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; - - stereo = ( (((newhead>>6)&0x3)) == 3) ? 1 : 2; - -// !checked later through tabsel_123[]! -// if(!bitrate_index || bitrate_index==15){ -// mp_msg(MSGT_DEMUXER,MSGL_DBG2,"Free format not supported.\n"); -// return -1; -// } - - if(lsf) - ssize = (stereo == 1) ? 9 : 17; - else - ssize = (stereo == 1) ? 17 : 32; - if(!((newhead>>16)&0x1)) ssize += 2; // CRC - - bitrate = tabsel_123[lsf][layer-1][bitrate_index]; - framesize = bitrate * mult[layer-1]; - - mp_msg(MSGT_DEMUXER,MSGL_DBG2,"FRAMESIZE: %d, layer: %d, bitrate: %d, mult: %d\n", - framesize, layer, tabsel_123[lsf][layer-1][bitrate_index], mult[layer-1]); - if(!framesize){ - mp_msg(MSGT_DEMUXER,MSGL_DBG2,"invalid framesize/bitrate_index\n"); - return -1; - } - - divisor = (layer == 3 ? (freqs[sampling_frequency] << lsf) : freqs[sampling_frequency]); - framesize /= divisor; - if(layer==1) - framesize = (framesize+padding)*4; - else - framesize += padding; - -// if(framesize<=0 || framesize>MAXFRAMESIZE) return FALSE; - if(srate) { - *srate = freqs[sampling_frequency]; - if(spf) { - if(layer == 1) - *spf = 384; - else if(layer == 2) - *spf = 1152; - else if(*srate < 32000) - *spf = 576; - else - *spf = 1152; - } - } - if(mpa_layer) *mpa_layer = layer; - if(chans) *chans = stereo; - if(br) *br = bitrate; - - return framesize; -} |