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tdemultimedia/mpg123_artsplugin/mpg123/common.c

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/* GPL clean */
#include <ctype.h>
#include <stdlib.h>
#include <signal.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/stat.h>
#ifdef WIN32
#include <time.h>
#else
#include <sys/time.h>
#endif
#include <fcntl.h>
#ifdef READ_MMAP
#include <sys/mman.h>
#ifndef MAP_FAILED
#define MAP_FAILED ( (void *) -1 )
#endif
#endif
#include "mpg123.h"
#include "genre.h"
#include "common.h"
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,} }
};
long freqs[9] = { 44100, 48000, 32000, 22050, 24000, 16000 , 11025 , 12000 , 8000 };
struct bitstream_info bsi;
static int bsbufend[2]= { 0,0 };
static int bsbufold_end;
static unsigned char bsspace[2][MAXFRAMESIZE+512]; /* MAXFRAMESIZE */
static unsigned char *bsbuf=bsspace[1],*bsbufold;
static int bsnum=0;
static int skip_riff(struct reader *);
static int skip_new_id3(struct reader *);
unsigned char *pcm_sample;
int pcm_point = 0;
int audiobufsize = AUDIOBUFSIZE;
static int decode_header(struct frame *fr,unsigned long newhead);
void safewrite(int fd, const void *buf, size_t count) {
int donesofar = 0;
while(donesofar < count) {
int retval;
char *p = (char*) buf + donesofar;
retval = write(fd,(void*) p,(count-donesofar));
if(retval == -1) {
if((errno != EINTR) && (errno != EAGAIN))
exit(fprintf(stderr,"exception on output!\n"));
} else
donesofar += retval;
}
}
void audio_flush(int outmode, struct audio_info_struct *ai)
{
if (pcm_point) {
switch (outmode) {
#ifndef NO_DECODE_FILE
case DECODE_FILE:
safewrite (OutputDescriptor, pcm_sample, pcm_point);
break;
#endif
#ifndef NO_DECODE_AUDIO
case DECODE_AUDIO:
audio_play_samples (ai, pcm_sample, pcm_point);
break;
#endif
#ifndef NOXFERMEM
case DECODE_BUFFER:
safewrite (buffer_fd[1], pcm_sample, pcm_point);
break;
#endif
#ifndef NO_DECODE_WAV
case DECODE_WAV:
case DECODE_CDR:
case DECODE_AU:
wav_write(pcm_sample, pcm_point);
break;
#endif
default:
break;
}
pcm_point = 0;
}
}
#if !defined(WIN32) && !defined(GENERIC)
void (*catchsignal(int signum, void(*handler)()))()
{
struct sigaction new_sa;
struct sigaction old_sa;
#ifdef DONT_CATCH_SIGNALS
printf ("Not catching any signals.\n");
return ((void (*)()) -1);
#endif
new_sa.sa_handler = handler;
sigemptyset(&new_sa.sa_mask);
new_sa.sa_flags = 0;
if (sigaction(signum, &new_sa, &old_sa) == -1)
return ((void (*)()) -1);
return (old_sa.sa_handler);
}
#endif
void read_frame_init (struct frame *fr)
{
fr->firsthead = 0;
fr->thishead = 0;
fr->freeformatsize = 0;
}
int head_check(unsigned long head)
{
if( (head & 0xffe00000) != 0xffe00000)
return FALSE;
if(!((head>>17)&3))
return FALSE;
if( ((head>>12)&0xf) == 0xf)
return FALSE;
if( ((head>>10)&0x3) == 0x3 )
return FALSE;
return TRUE;
}
/*
* return 0: EOF or other stream error
* -1: giving up
* 1: synched
*/
#define MAX_INPUT_FRAMESIZE 1920
#define SYNC_HEAD_MASK 0xffff0000
#define SYNC_HEAD_MASK_FF 0x0000f000
#define LOOK_AHEAD_NUM 3
#define SCAN_LENGTH 16384
#define CHECK_FOR_RIFF 0x0001
#define CHECK_FOR_ID3_V1 0x0002
#define CHECK_FOR_ID3_V2 0x0004
int sync_stream(struct reader *rds,struct frame *fr,int flags,int *skipped)
{
int i,j,l,ret;
unsigned long firsthead,nexthead;
struct frame frameInfo,nextInfo;
unsigned char dummybuf[MAX_INPUT_FRAMESIZE];
int found=0;
int freeformatsize=0;
for(i=0;i<SCAN_LENGTH;i++) {
readers_mark_pos(rds); /* store our current position */
if(!rds->head_read(rds,&firsthead))
return 0;
/* first a few simple checks */
if( !head_check(firsthead) || !decode_header(&frameInfo,firsthead) ) {
/* Check for RIFF Headers */
if( (flags & CHECK_FOR_RIFF) && firsthead == ('R'<<24)+('I'<<16)+('F'<<8)+'F') {
fprintf(stderr,"Found RIFF Header\n");
ret = skip_riff(rds);
if(ret > 0) { /* RIFF was OK continue with next byte */
*skipped += ret+4;
continue;
}
if(ret == 0)
return 0;
}
/* Check for old ID3 Header (or better Footer ;) */
if( (flags & CHECK_FOR_ID3_V1) && (firsthead>>8) == ('T'<<16)+('A'<<8)+'G') {
fprintf(stderr,"Found old ID3 Header\n");
}
/* Check for new ID3 header */
if( (flags & CHECK_FOR_ID3_V2) && (firsthead>>8) == ('I'<<16)+('D'<<8)+'3') {
if( (firsthead & 0xff) != 0xff) {
fprintf(stderr,"Found new ID3 Header\n");
ret = skip_new_id3(rds);
if(!ret)
return 0;
if(ret > 0) {
*skipped += ret+4;
continue;
}
}
}
readers_goto_mark(rds); /* reset to old mark and continue */
if(!rds->read_frame_body(rds,dummybuf,1))
return 0;
(*skipped)++;
continue;
}
found = 0;
freeformatsize = 0;
/*
* At the first free format paket we do not know the size
*/
if(frameInfo.bitrate_index == 0) {
int maxframesize = MAX_INPUT_FRAMESIZE; /* FIXME depends on layer and sampling freq */
fprintf(stderr,"Searching for next FF header\n");
if(!rds->head_read(rds,&nexthead))
return 0;
for(j=0;j<maxframesize;j++) {
if(head_check(nexthead) && (nexthead & (SYNC_HEAD_MASK|SYNC_HEAD_MASK_FF) ) == (firsthead & (SYNC_HEAD_MASK|SYNC_HEAD_MASK_FF)) &&
decode_header(&nextInfo,nexthead) ) {
/* fprintf(stderr,"j: %d %d %d\n",j,frameInfo.padsize,nextInfo.padsize); */
freeformatsize = j - frameInfo.padsize;
found = 1;
break;
}
if(!rds->head_shift(rds,&nexthead))
return 0;
}
}
else {
if(!rds->read_frame_body(rds,dummybuf,frameInfo.framesize))
return 0;
if(!rds->head_read(rds,&nexthead))
return 0;
/*
fprintf(stderr,"S: %08lx %08lx %d %d %d %d\n",firsthead,nexthead, head_check(nexthead),(nexthead & SYNC_HEAD_MASK) == firsthead,(nexthead & SYNC_HEAD_MASK_FF) != 0x0,decode_header(&nextInfo,nexthead));
*/
if( head_check(nexthead) && (nexthead & SYNC_HEAD_MASK) == (firsthead & SYNC_HEAD_MASK) &&
(nexthead & SYNC_HEAD_MASK_FF) != 0x0 && decode_header(&nextInfo,nexthead)) {
found = 1;
}
}
if(!found) {
readers_goto_mark(rds); /* reset to old mark and continue */
if(!rds->read_frame_body(rds,dummybuf,1))
return 0;
(*skipped)++;
continue;
}
/*
fprintf(stderr,"s: %08lx %08lx %d %d %d\n",firsthead,nexthead,frameInfo.framesize,nextInfo.framesize,freeformatsize);
*/
/* check some more frames */
for(l=0;l<LOOK_AHEAD_NUM;l++) {
int size;
if( freeformatsize > 0 ) {
size = freeformatsize + nextInfo.padsize;
}
else
size = nextInfo.framesize;
/* step over data */
if(!rds->read_frame_body(rds,dummybuf,size))
return 0;
if(!rds->head_read(rds,&nexthead))
return 0;
if(!head_check(nexthead) ||
(nexthead & SYNC_HEAD_MASK) != (firsthead & SYNC_HEAD_MASK) ||
!decode_header(&nextInfo,nexthead) ) {
found = 0;
break;
}
if( freeformatsize > 0) {
if( ( nexthead & SYNC_HEAD_MASK_FF ) != 0x0) {
found = 0;
break;
}
}
else {
if( (nexthead & SYNC_HEAD_MASK_FF) == 0x0) {
found = 0;
break;
}
}
}
if(found)
break;
readers_goto_mark(rds); /* reset to old mark and continue */
if(!rds->read_frame_body(rds,dummybuf,1)) /* skip first byte */
return 0;
(*skipped)++;
}
if(i == SCAN_LENGTH)
return -1;
readers_goto_mark(rds);
fr->freeformatsize = freeformatsize;
fr->firsthead = firsthead;
return 1;
}
/*
* skips the RIFF header at the beginning
*
* returns: 0 = read-error
* -1/-2 = illegal RIFF header (= -2 backstep not valid)
* 1 = skipping succeeded
*/
static int skip_riff(struct reader *rds)
{
unsigned long length;
unsigned char buf[16];
if(!rds->read_frame_body(rds,buf,16)) /* read header information */
return 0;
if( strncmp("WAVEfmt ",(char *)buf+4,8) ) /* check 2. signature */
return -1;
length = (unsigned long) buf[12] + /* decode the header length */
(((unsigned long) buf[13])<<8) +
(((unsigned long) buf[14])<<16) +
(((unsigned long) buf[15])<<24);
if(!rds->skip_bytes(rds,length)) /* will not store data in backbuff! */
return 0;
if(!rds->read_frame_body(rds,buf,8)) /* skip "data" plus length */
return 0;
if(strncmp("data",(char *)buf,4))
return -2;
return length+8+16;
}
/*
* skips the ID3 header at the beginning
*
* returns: 0 = read-error
* -1 = illegal ID3 header
* 1 = skipping succeeded
*/
static int skip_new_id3(struct reader *rds)
{
unsigned long length;
unsigned char buf[6];
if(!rds->read_frame_body(rds,buf,6)) /* read more header information */
return 0;
if(buf[0] == 0xff)
return -1;
if( (buf[2]|buf[3]|buf[4]|buf[5]) & 0x80)
return -1;
length = (unsigned long) buf[2] & 0x7f;
length <<= 7;
length += (unsigned long) buf[3] & 0x7f;
length <<= 7;
length += (unsigned long) buf[4] & 0x7f;
length <<= 7;
length += (unsigned long) buf[5] & 0x7f;
if(!rds->skip_bytes(rds,length)) /* will not store data in backbuff! */
return 0;
return length+6;
}
/*****************************************************************
* read next frame
*/
int read_frame(struct reader *rds,struct frame *fr)
{
unsigned long newhead,oldhead;
static unsigned char ssave[34];
oldhead = fr->thishead;
if (param.halfspeed) {
static int halfphase = 0;
if (halfphase--) {
bsi.bitindex = 0;
bsi.wordpointer = (unsigned char *) bsbuf;
if (fr->lay == 3)
memcpy (bsbuf, ssave, fr->sideInfoSize);
return 1;
}
else
halfphase = param.halfspeed - 1;
}
while(1) {
if(!rds->head_read(rds,&newhead))
return FALSE;
/*
fprintf(stderr,"n %08lx",newhead);
*/
if( !head_check(newhead) || !decode_header(fr,newhead) ) {
if (!param.quiet)
fprintf(stderr,"Illegal Audio-MPEG-Header 0x%08lx at offset 0x%lx.\n",
newhead,rds->tell(rds)-4);
if(param.tryresync) {
int try = 0;
readers_pushback_header(rds,newhead);
if(sync_stream(rds,fr,0xffff,&try) <= 0)
return 0;
if(!param.quiet)
fprintf (stderr, "Skipped %d bytes in input.\n", try);
}
else
return (0);
}
else
break;
}
/*
fprintf(stderr,"N %08lx",newhead);
*/
fr->header_change = 2;
if(oldhead) {
if((oldhead & 0xc00) == (fr->thishead & 0xc00)) {
if( (oldhead & 0xc0) == 0 && (fr->thishead & 0xc0) == 0)
fr->header_change = 1;
else if( (oldhead & 0xc0) > 0 && (fr->thishead & 0xc0) > 0)
fr->header_change = 1;
}
}
if(!fr->bitrate_index) {
fr->framesize = fr->freeformatsize + fr->padsize;
}
/*
fprintf(stderr,"Reading %d\n",fr->framesize);
*/
/* flip/init buffer for Layer 3 */
/* FIXME for reentrance */
bsbufold = bsbuf;
bsbufold_end = bsbufend[bsnum];
bsbuf = bsspace[bsnum]+512;
bsnum = (bsnum + 1) & 1;
bsbufend[bsnum] = fr->framesize;
/* read main data into memory */
if(!rds->read_frame_body(rds,bsbuf,fr->framesize))
return 0;
{
/* Test */
static struct vbrHeader head;
static int vbr = 0; /* FIXME */
if(!vbr) {
getVBRHeader(&head,bsbuf,fr);
vbr = 1;
}
}
bsi.bitindex = 0;
bsi.wordpointer = (unsigned char *) bsbuf;
if (param.halfspeed && fr->lay == 3)
memcpy (ssave, bsbuf, fr->sideInfoSize);
return 1;
}
/*
* decode a header and write the information
* into the frame structure
*/
static int decode_header(struct frame *fr,unsigned long newhead)
{
if(!head_check(newhead)) {
fprintf(stderr,"Oopps header is wrong %08lx\n",newhead);
return 0;
}
if( newhead & (1<<20) ) {
fr->lsf = (newhead & (1<<19)) ? 0x0 : 0x1;
fr->mpeg25 = 0;
}
else {
fr->lsf = 1;
fr->mpeg25 = 1;
}
/*
* CHECKME: should be add more consistency checks here ?
* changed layer, changed CRC bit, changed sampling frequency
*/
{
fr->lay = 4-((newhead>>17)&3);
if( ((newhead>>10)&0x3) == 0x3) {
fprintf(stderr,"Stream error\n");
return 0;
}
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;
fr->stereo = (fr->mode == MPG_MD_MONO) ? 1 : 2;
switch(fr->lay) {
case 1:
fr->framesize = (long) tabsel_123[fr->lsf][0][fr->bitrate_index] * 12000;
fr->framesize /= freqs[fr->sampling_frequency];
fr->framesize = ((fr->framesize+fr->padding)<<2)-4;
fr->sideInfoSize = 0;
fr->padsize = fr->padding << 2;
break;
case 2:
fr->framesize = (long) tabsel_123[fr->lsf][1][fr->bitrate_index] * 144000;
fr->framesize /= freqs[fr->sampling_frequency];
fr->framesize += fr->padding - 4;
fr->sideInfoSize = 0;
fr->padsize = fr->padding;
break;
case 3:
if(fr->lsf)
fr->sideInfoSize = (fr->stereo == 1) ? 9 : 17;
else
fr->sideInfoSize = (fr->stereo == 1) ? 17 : 32;
if(fr->error_protection)
fr->sideInfoSize += 2;
fr->framesize = (long) tabsel_123[fr->lsf][2][fr->bitrate_index] * 144000;
fr->framesize /= freqs[fr->sampling_frequency]<<(fr->lsf);
fr->framesize = fr->framesize + fr->padding - 4;
fr->padsize = fr->padding;
break;
default:
fprintf(stderr,"Sorry, unknown layer type.\n");
return (0);
}
if(!fr->bitrate_index) {
/* fprintf(stderr,"Warning, Free format not heavily tested: (head %08lx)\n",newhead); */
fr->framesize = 0;
}
fr->thishead = newhead;
return 1;
}
#ifdef MPG123_REMOTE
void print_rheader(struct frame *fr)
{
static char *modes[4] = { "Stereo", "Joint-Stereo", "Dual-Channel", "Single-Channel" };
static char *layers[4] = { "Unknown" , "I", "II", "III" };
static char *mpeg_type[2] = { "1.0" , "2.0" };
/* version, layer, freq, mode, channels, bitrate, BPF */
fprintf(stderr,"@I %s %s %ld %s %d %d %d\n",
mpeg_type[fr->lsf],layers[fr->lay],freqs[fr->sampling_frequency],
modes[fr->mode],fr->stereo,
tabsel_123[fr->lsf][fr->lay-1][fr->bitrate_index],
fr->framesize+4);
}
#endif
void print_header(struct frame *fr)
{
static char *modes[4] = { "Stereo", "Joint-Stereo", "Dual-Channel", "Single-Channel" };
static char *layers[4] = { "Unknown" , "I", "II", "III" };
fprintf(stderr,"MPEG %s, Layer: %s, Freq: %ld, mode: %s, modext: %d, BPF : %d\n",
fr->mpeg25 ? "2.5" : (fr->lsf ? "2.0" : "1.0"),
layers[fr->lay],freqs[fr->sampling_frequency],
modes[fr->mode],fr->mode_ext,fr->framesize+4);
fprintf(stderr,"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);
fprintf(stderr,"Bitrate: %d Kbits/s, Extension value: %d\n",
tabsel_123[fr->lsf][fr->lay-1][fr->bitrate_index],fr->extension);
}
void print_header_compact(struct frame *fr)
{
static char *modes[4] = { "stereo", "joint-stereo", "dual-channel", "mono" };
static char *layers[4] = { "Unknown" , "I", "II", "III" };
fprintf(stderr,"MPEG %s layer %s, %d kbit/s, %ld Hz %s\n",
fr->mpeg25 ? "2.5" : (fr->lsf ? "2.0" : "1.0"),
layers[fr->lay],
tabsel_123[fr->lsf][fr->lay-1][fr->bitrate_index],
freqs[fr->sampling_frequency], modes[fr->mode]);
}
void print_id3_tag(unsigned char *buf)
{
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 = (struct id3tag *) buf;
char title[31]={0,};
char artist[31]={0,};
char album[31]={0,};
char year[5]={0,};
char comment[31]={0,};
char genre[31]={0,};
if(param.quiet)
return;
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);
}
fprintf(stderr,"Title : %-30s Artist: %s\n",title,artist);
fprintf(stderr,"Album : %-30s Year : %4s\n",album,year);
fprintf(stderr,"Comment: %-30s Genre : %s\n",comment,genre);
}
#if 0
/* removed the strndup for better portability */
/*
* Allocate space for a new string containing the first
* "num" characters of "src". The resulting string is
* always zero-terminated. Returns NULL if malloc fails.
*/
char *strndup (const char *src, int num)
{
char *dst;
if (!(dst = (char *) malloc(num+1)))
return (NULL);
dst[num] = '\0';
return (strncpy(dst, src, num));
}
#endif
/*
* Split "path" into directory and filename components.
*
* Return value is 0 if no directory was specified (i.e.
* "path" does not contain a '/'), OR if the directory
* is the same as on the previous call to this function.
*
* Return value is 1 if a directory was specified AND it
* is different from the previous one (if any).
*/
int split_dir_file (const char *path, char **dname, char **fname)
{
static char *lastdir = NULL;
char *slashpos;
if ((slashpos = strrchr(path, '/'))) {
*fname = slashpos + 1;
*dname = strdup(path); /* , 1 + slashpos - path); */
if(!(*dname)) {
perror("memory");
exit(1);
}
(*dname)[1 + slashpos - path] = 0;
if (lastdir && !strcmp(lastdir, *dname)) {
/*** same as previous directory ***/
free (*dname);
*dname = lastdir;
return 0;
}
else {
/*** different directory ***/
if (lastdir)
free (lastdir);
lastdir = *dname;
return 1;
}
}
else {
/*** no directory specified ***/
if (lastdir) {
free (lastdir);
lastdir = NULL;
};
*dname = NULL;
*fname = (char *)path;
return 0;
}
}
void set_pointer(int ssize,long backstep)
{
bsi.wordpointer = bsbuf + ssize - backstep;
if (backstep)
memcpy(bsi.wordpointer,bsbufold+bsbufold_end-backstep,backstep);
bsi.bitindex = 0;
}
/********************************/
double compute_bpf(struct frame *fr)
{
double bpf;
if(!fr->bitrate_index) {
return fr->freeformatsize + 4;
}
switch(fr->lay) {
case 1:
bpf = tabsel_123[fr->lsf][0][fr->bitrate_index];
bpf *= 12000.0 * 4.0;
bpf /= freqs[fr->sampling_frequency] <<(fr->lsf);
break;
case 2:
case 3:
bpf = tabsel_123[fr->lsf][fr->lay-1][fr->bitrate_index];
bpf *= 144000;
bpf /= freqs[fr->sampling_frequency] << (fr->lsf);
break;
default:
bpf = 1.0;
}
return bpf;
}
double compute_tpf(struct frame *fr)
{
static int bs[4] = { 0,384,1152,1152 };
double tpf;
tpf = (double) bs[fr->lay];
tpf /= freqs[fr->sampling_frequency] << (fr->lsf);
return tpf;
}
/*
* Returns number of frames queued up in output buffer, i.e.
* offset between currently played and currently decoded frame.
*/
#ifndef NOXFERMEM
long compute_buffer_offset(struct frame *fr)
{
long bufsize;
/*
* buffermem->buf[0] holds output sampling rate,
* buffermem->buf[1] holds number of channels,
* buffermem->buf[2] holds audio format of output.
*/
if(!param.usebuffer || !(bufsize=xfermem_get_usedspace(buffermem))
|| !buffermem->buf[0] || !buffermem->buf[1])
return 0;
bufsize = (long)((double) bufsize / buffermem->buf[0] /
buffermem->buf[1] / compute_tpf(fr));
if((buffermem->buf[2] & AUDIO_FORMAT_MASK) == AUDIO_FORMAT_16)
return bufsize/2;
else
return bufsize;
}
#endif
void print_stat(struct reader *rds,struct frame *fr,int no,long buffsize,struct audio_info_struct *ai)
{
double bpf,tpf,tim1,tim2;
double dt = 0.0;
int sno,rno;
char outbuf[256];
if(!rds || !fr)
return;
outbuf[0] = 0;
#ifndef GENERIC
{
struct timeval t;
fd_set serr;
int n,errfd = fileno(stderr);
t.tv_sec=t.tv_usec=0;
FD_ZERO(&serr);
FD_SET(errfd,&serr);
n = select(errfd+1,NULL,&serr,NULL,&t);
if(n <= 0)
return;
}
#endif
bpf = compute_bpf(fr);
tpf = compute_tpf(fr);
if(buffsize > 0 && ai && ai->rate > 0 && ai->channels > 0) {
dt = (double) buffsize / ai->rate / ai->channels;
if( (ai->format & AUDIO_FORMAT_MASK) == AUDIO_FORMAT_16)
dt *= 0.5;
}
rno = 0;
sno = no;
if(rds->filelen >= 0) {
long t = rds->tell(rds);
rno = (int)((double)(rds->filelen-t)/bpf);
sno = (int)((double)t/bpf);
}
sprintf(outbuf+strlen(outbuf),"\rFrame# %5d [%5d], ",sno,rno);
tim1 = sno*tpf-dt;
tim2 = rno*tpf+dt;
#if 0
tim1 = tim1 < 0 ? 0.0 : tim1;
#endif
tim2 = tim2 < 0 ? 0.0 : tim2;
sprintf(outbuf+strlen(outbuf),"Time: %02u:%02u.%02u [%02u:%02u.%02u], ",
(unsigned int)tim1/60,
(unsigned int)tim1%60,
(unsigned int)(tim1*100)%100,
(unsigned int)tim2/60,
(unsigned int)tim2%60,
(unsigned int)(tim2*100)%100);
if(param.usebuffer)
sprintf(outbuf+strlen(outbuf),"[%8ld] ",(long)buffsize);
write(fileno(stderr),outbuf,strlen(outbuf));
#if 0
fflush(out); /* hmm not really nec. */
#endif
}
int get_songlen(struct reader *rds,struct frame *fr,int no)
{
double tpf;
if(!fr)
return 0;
if(no < 0) {
if(!rds || rds->filelen < 0)
return 0;
no = (double) rds->filelen / compute_bpf(fr);
}
tpf = compute_tpf(fr);
return no*tpf;
}
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