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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;
}
#ifndef NO_DECODE_AUDIO
if(audio_open(&ai1) < 0) {
perror("audio");
exit(1);
}
#endif
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;
}
}
}
#ifndef NO_DECODE_AUDIO
audio_close(&ai1);
#endif
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;
int save_channels = c;
int save_rate = r;
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;
}
else {
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>>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;
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>>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;
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,"\nAudiodevice: No supported audio rate found for %d Hz and %d channels !\n",save_rate,save_channels);
fprintf(stderr,"Use '-vv' to list all possible audio rates and\n");
fprintf(stderr,"choose a supported rate with the '-r <rate>' option.\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(AIX_UMS) || defined(NAS)
void audio_queueflush(struct audio_info_struct *ai)
{
}
#endif
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