This commit is contained in:
Cary Sandvig 2000-10-11 22:12:13 +00:00
parent a1ac3c342b
commit a0a940046a
3 changed files with 523 additions and 0 deletions

266
panda/src/mpg123/audio.c Normal file
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#include "mpg123.h"
void audio_info_struct_init(struct audio_info_struct *ai)
{
#ifdef AUDIO_USES_FD
ai->fn = -1;
#endif
#ifdef SGI
#if 0
ALconfig config;
ALport port;
#endif
#endif
ai->rate = -1;
ai->gain = -1;
ai->output = -1;
#ifdef ALSA
ai->handle = NULL;
ai->alsa_format.format = -1;
ai->alsa_format.rate = -1;
ai->alsa_format.channels = -1;
#endif
ai->device = NULL;
ai->channels = -1;
ai->format = -1;
}
#define NUM_CHANNELS 2
#define NUM_ENCODINGS 6
#define NUM_RATES 10
struct audio_name audio_val2name[NUM_ENCODINGS+1] = {
{ AUDIO_FORMAT_SIGNED_16 , "signed 16 bit" , "s16 " } ,
{ AUDIO_FORMAT_UNSIGNED_16, "unsigned 16 bit" , "u16 " } ,
{ AUDIO_FORMAT_UNSIGNED_8 , "unsigned 8 bit" , "u8 " } ,
{ AUDIO_FORMAT_SIGNED_8 , "signed 8 bit" , "s8 " } ,
{ AUDIO_FORMAT_ULAW_8 , "mu-law (8 bit)" , "ulaw " } ,
{ AUDIO_FORMAT_ALAW_8 , "a-law (8 bit)" , "alaw " } ,
{ -1 , NULL }
};
#if 0
static char *channel_name[NUM_CHANNELS] =
{ "mono" , "stereo" };
#endif
static int channels[NUM_CHANNELS] = { 1 , 2 };
static int rates[NUM_RATES] = {
8000, 11025, 12000,
16000, 22050, 24000,
32000, 44100, 48000,
8000 /* 8000 = dummy for user forced */
};
static int encodings[NUM_ENCODINGS] = {
AUDIO_FORMAT_SIGNED_16,
AUDIO_FORMAT_UNSIGNED_16,
AUDIO_FORMAT_UNSIGNED_8,
AUDIO_FORMAT_SIGNED_8,
AUDIO_FORMAT_ULAW_8,
AUDIO_FORMAT_ALAW_8
};
static char capabilities[NUM_CHANNELS][NUM_ENCODINGS][NUM_RATES];
void audio_capabilities(struct audio_info_struct *ai)
{
int fmts;
int i,j,k,k1=NUM_RATES-1;
struct audio_info_struct ai1 = *ai;
if (param.outmode != DECODE_AUDIO) {
memset(capabilities,1,sizeof(capabilities));
return;
}
memset(capabilities,0,sizeof(capabilities));
if(param.force_rate) {
rates[NUM_RATES-1] = param.force_rate;
k1 = NUM_RATES;
}
if(audio_open(&ai1) < 0) {
perror("audio");
exit(1);
}
for(i=0;i<NUM_CHANNELS;i++) {
for(j=0;j<NUM_RATES;j++) {
ai1.channels = channels[i];
ai1.rate = rates[j];
fmts = audio_get_formats(&ai1);
if(fmts < 0)
continue;
for(k=0;k<NUM_ENCODINGS;k++) {
if((fmts & encodings[k]) == encodings[k])
capabilities[i][k][j] = 1;
}
}
}
audio_close(&ai1);
if(param.verbose > 1) {
fprintf(stderr,"\nAudio capabilities:\n |");
for(j=0;j<NUM_ENCODINGS;j++) {
fprintf(stderr," %5s |",audio_val2name[j].sname);
}
fprintf(stderr,"\n --------------------------------------------------------\n");
for(k=0;k<k1;k++) {
fprintf(stderr," %5d |",rates[k]);
for(j=0;j<NUM_ENCODINGS;j++) {
if(capabilities[0][j][k]) {
if(capabilities[1][j][k])
fprintf(stderr," M/S |");
else
fprintf(stderr," M |");
}
else if(capabilities[1][j][k])
fprintf(stderr," S |");
else
fprintf(stderr," |");
}
fprintf(stderr,"\n");
}
fprintf(stderr,"\n");
}
}
static int rate2num(int r)
{
int i;
for(i=0;i<NUM_RATES;i++)
if(rates[i] == r)
return i;
return -1;
}
static int audio_fit_cap_helper(struct audio_info_struct *ai,int rn,int f0,int f2,int c)
{
int i;
if(rn >= 0) {
for(i=f0;i<f2;i++) {
if(capabilities[c][i][rn]) {
ai->rate = rates[rn];
ai->format = encodings[i];
ai->channels = channels[c];
return 1;
}
}
}
return 0;
}
/*
* c=num of channels of stream
* r=rate of stream
*/
void audio_fit_capabilities(struct audio_info_struct *ai,int c,int r)
{
int rn;
int f0=0;
if(param.force_8bit) {
f0 = 2;
}
c--; /* stereo=1 ,mono=0 */
if(param.force_mono >= 0)
c = 0;
if(param.force_stereo)
c = 1;
if(param.force_rate) {
rn = rate2num(param.force_rate);
if(audio_fit_cap_helper(ai,rn,f0,2,c))
return;
if(audio_fit_cap_helper(ai,rn,2,NUM_ENCODINGS,c))
return;
if(c == 1 && !param.force_stereo)
c = 0;
else if(c == 0 && !param.force_mono)
c = 1;
if(audio_fit_cap_helper(ai,rn,f0,2,c))
return;
if(audio_fit_cap_helper(ai,rn,2,NUM_ENCODINGS,c))
return;
fprintf(stderr,"No supported rate found!\n");
exit(1);
}
rn = rate2num(r>>0);
if(audio_fit_cap_helper(ai,rn,f0,2,c))
return;
rn = rate2num(r>>1);
if(audio_fit_cap_helper(ai,rn,f0,2,c))
return;
rn = rate2num(r>>2);
if(audio_fit_cap_helper(ai,rn,f0,2,c))
return;
rn = rate2num(r>>0);
if(audio_fit_cap_helper(ai,rn,2,NUM_ENCODINGS,c))
return;
rn = rate2num(r>>1);
if(audio_fit_cap_helper(ai,rn,2,NUM_ENCODINGS,c))
return;
rn = rate2num(r>>2);
if(audio_fit_cap_helper(ai,rn,2,NUM_ENCODINGS,c))
return;
if(c == 1 && !param.force_stereo)
c = 0;
else if(c == 0 && !param.force_mono)
c = 1;
rn = rate2num(r>>0);
if(audio_fit_cap_helper(ai,rn,f0,2,c))
return;
rn = rate2num(r>>1);
if(audio_fit_cap_helper(ai,rn,f0,2,c))
return;
rn = rate2num(r>>2);
if(audio_fit_cap_helper(ai,rn,f0,2,c))
return;
rn = rate2num(r>>0);
if(audio_fit_cap_helper(ai,rn,2,NUM_ENCODINGS,c))
return;
rn = rate2num(r>>1);
if(audio_fit_cap_helper(ai,rn,2,NUM_ENCODINGS,c))
return;
rn = rate2num(r>>2);
if(audio_fit_cap_helper(ai,rn,2,NUM_ENCODINGS,c))
return;
fprintf(stderr,"No supported rate found!\n");
exit(1);
}
char *audio_encoding_name(int format)
{
int i;
for(i=0;i<NUM_ENCODINGS;i++) {
if(audio_val2name[i].val == format)
return audio_val2name[i].name;
}
return "Unknown";
}
#if !defined(SOLARIS) && !defined(__NetBSD__) || defined(NAS)
void audio_queueflush(struct audio_info_struct *ai)
{
}
#endif

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panda/src/mpg123/audio.h Normal file
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/*
* Audio 'LIB' defines
*/
#define AUDIO_OUT_HEADPHONES 0x01
#define AUDIO_OUT_INTERNAL_SPEAKER 0x02
#define AUDIO_OUT_LINE_OUT 0x04
enum { DECODE_TEST, DECODE_AUDIO, DECODE_FILE, DECODE_BUFFER, DECODE_WAV,
DECODE_AU,DECODE_CDR,DECODE_AUDIOFILE };
#define AUDIO_FORMAT_MASK 0x100
#define AUDIO_FORMAT_16 0x100
#define AUDIO_FORMAT_8 0x000
#define AUDIO_FORMAT_SIGNED_16 0x110
#define AUDIO_FORMAT_UNSIGNED_16 0x120
#define AUDIO_FORMAT_UNSIGNED_8 0x1
#define AUDIO_FORMAT_SIGNED_8 0x2
#define AUDIO_FORMAT_ULAW_8 0x4
#define AUDIO_FORMAT_ALAW_8 0x8
/* 3% rate tolerance */
#define AUDIO_RATE_TOLERANCE 3
#if 0
#if defined(HPUX) || defined(SUNOS) || defined(SOLARIS) || defined(OSS) || defined(__NetBSD__) || defined(SPARCLINUX) || defined(__FreeBSD__)
#endif
#endif
#define AUDIO_USES_FD
#ifdef SGI
/* #include <audio.h> */
#include <dmedia/audio.h>
#endif
#ifdef ALSA
#include <sys/asoundlib.h>
#endif
struct audio_info_struct
{
#ifdef AUDIO_USES_FD
int fn; /* filenumber */
#endif
#ifdef SGI
ALconfig config;
ALport port;
#endif
long rate;
long gain;
int output;
#ifdef ALSA
snd_pcm_t *handle;
snd_pcm_format_t alsa_format;
#endif
char *device;
int channels;
int format;
int private1;
void *private2;
};
struct audio_name {
int val;
char *name;
char *sname;
};
extern void audio_capabilities(struct audio_info_struct *);
extern void audio_fit_capabilities(struct audio_info_struct *ai,int c,int r);
extern char *audio_encoding_name(int format);
extern int audio_play_samples(struct audio_info_struct *,unsigned char *,int);
extern int audio_open(struct audio_info_struct *);
extern int audio_reset_parameters(struct audio_info_struct *);
extern int audio_rate_best_match(struct audio_info_struct *ai);
extern int audio_set_rate(struct audio_info_struct *);
extern int audio_set_format(struct audio_info_struct *);
extern int audio_get_formats(struct audio_info_struct *);
extern int audio_set_channels(struct audio_info_struct *);
extern int audio_write_sample(struct audio_info_struct *,short *,int);
extern int audio_close(struct audio_info_struct *);
extern void audio_info_struct_init(struct audio_info_struct *);
extern void audio_queueflush(struct audio_info_struct *ai);

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panda/src/mpg123/dct64.c Normal file
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/*
* Discrete Cosine Tansform (DCT) for subband synthesis
*
* -funroll-loops (for gcc) will remove the loops for better performance
* using loops in the source-code enhances readabillity
*/
/*
* TODO: write an optimized version for the down-sampling modes
* (in these modes the bands 16-31 (2:1) or 8-31 (4:1) are zero
*/
#include "mpg123.h"
void dct64(real *out0,real *out1,real *samples)
{
real bufs[64];
{
register int i,j;
register real *b1,*b2,*bs,*costab;
b1 = samples;
bs = bufs;
costab = pnts[0]+16;
b2 = b1 + 32;
for(i=15;i>=0;i--)
*bs++ = (*b1++ + *--b2);
for(i=15;i>=0;i--)
*bs++ = (*--b2 - *b1++) * *--costab;
b1 = bufs;
costab = pnts[1]+8;
b2 = b1 + 16;
{
for(i=7;i>=0;i--)
*bs++ = (*b1++ + *--b2);
for(i=7;i>=0;i--)
*bs++ = (*--b2 - *b1++) * *--costab;
b2 += 32;
costab += 8;
for(i=7;i>=0;i--)
*bs++ = (*b1++ + *--b2);
for(i=7;i>=0;i--)
*bs++ = (*b1++ - *--b2) * *--costab;
b2 += 32;
}
bs = bufs;
costab = pnts[2];
b2 = b1 + 8;
for(j=2;j;j--)
{
for(i=3;i>=0;i--)
*bs++ = (*b1++ + *--b2);
for(i=3;i>=0;i--)
*bs++ = (*--b2 - *b1++) * costab[i];
b2 += 16;
for(i=3;i>=0;i--)
*bs++ = (*b1++ + *--b2);
for(i=3;i>=0;i--)
*bs++ = (*b1++ - *--b2) * costab[i];
b2 += 16;
}
b1 = bufs;
costab = pnts[3];
b2 = b1 + 4;
for(j=4;j;j--)
{
*bs++ = (*b1++ + *--b2);
*bs++ = (*b1++ + *--b2);
*bs++ = (*--b2 - *b1++) * costab[1];
*bs++ = (*--b2 - *b1++) * costab[0];
b2 += 8;
*bs++ = (*b1++ + *--b2);
*bs++ = (*b1++ + *--b2);
*bs++ = (*b1++ - *--b2) * costab[1];
*bs++ = (*b1++ - *--b2) * costab[0];
b2 += 8;
}
bs = bufs;
costab = pnts[4];
for(j=8;j;j--)
{
real v0,v1;
v0=*b1++; v1 = *b1++;
*bs++ = (v0 + v1);
*bs++ = (v0 - v1) * (*costab);
v0=*b1++; v1 = *b1++;
*bs++ = (v0 + v1);
*bs++ = (v1 - v0) * (*costab);
}
}
{
register real *b1;
register int i;
for(b1=bufs,i=8;i;i--,b1+=4)
b1[2] += b1[3];
for(b1=bufs,i=4;i;i--,b1+=8)
{
b1[4] += b1[6];
b1[6] += b1[5];
b1[5] += b1[7];
}
for(b1=bufs,i=2;i;i--,b1+=16)
{
b1[8] += b1[12];
b1[12] += b1[10];
b1[10] += b1[14];
b1[14] += b1[9];
b1[9] += b1[13];
b1[13] += b1[11];
b1[11] += b1[15];
}
}
out0[0x10*16] = bufs[0];
out0[0x10*15] = bufs[16+0] + bufs[16+8];
out0[0x10*14] = bufs[8];
out0[0x10*13] = bufs[16+8] + bufs[16+4];
out0[0x10*12] = bufs[4];
out0[0x10*11] = bufs[16+4] + bufs[16+12];
out0[0x10*10] = bufs[12];
out0[0x10* 9] = bufs[16+12] + bufs[16+2];
out0[0x10* 8] = bufs[2];
out0[0x10* 7] = bufs[16+2] + bufs[16+10];
out0[0x10* 6] = bufs[10];
out0[0x10* 5] = bufs[16+10] + bufs[16+6];
out0[0x10* 4] = bufs[6];
out0[0x10* 3] = bufs[16+6] + bufs[16+14];
out0[0x10* 2] = bufs[14];
out0[0x10* 1] = bufs[16+14] + bufs[16+1];
out0[0x10* 0] = bufs[1];
out1[0x10* 0] = bufs[1];
out1[0x10* 1] = bufs[16+1] + bufs[16+9];
out1[0x10* 2] = bufs[9];
out1[0x10* 3] = bufs[16+9] + bufs[16+5];
out1[0x10* 4] = bufs[5];
out1[0x10* 5] = bufs[16+5] + bufs[16+13];
out1[0x10* 6] = bufs[13];
out1[0x10* 7] = bufs[16+13] + bufs[16+3];
out1[0x10* 8] = bufs[3];
out1[0x10* 9] = bufs[16+3] + bufs[16+11];
out1[0x10*10] = bufs[11];
out1[0x10*11] = bufs[16+11] + bufs[16+7];
out1[0x10*12] = bufs[7];
out1[0x10*13] = bufs[16+7] + bufs[16+15];
out1[0x10*14] = bufs[15];
out1[0x10*15] = bufs[16+15];
}