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driver_alsa.cpp
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// driver_alsa.cpp
//
// caed(8) driver for Advanced Linux Audio Architecture devices
//
// (C) Copyright 2021 Fred Gleason <[email protected]>
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License version 2 as
// published by the Free Software Foundation.
//
// This program 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 this program; if not, write to the Free Software
// Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
//
#include <math.h>
#include <signal.h>
#include <rdconf.h>
#include <rdmeteraverage.h>
#include <rdringbuffer.h>
#include "driver_alsa.h"
#ifdef ALSA
//
// Callback Variables
//
volatile int alsa_input_channels[RD_MAX_CARDS][RD_MAX_PORTS];
volatile int alsa_output_channels[RD_MAX_CARDS][RD_MAX_STREAMS];
RDMeterAverage *alsa_input_meter[RD_MAX_CARDS][RD_MAX_PORTS][2];
RDMeterAverage *alsa_output_meter[RD_MAX_CARDS][RD_MAX_PORTS][2];
RDMeterAverage *alsa_stream_output_meter[RD_MAX_CARDS][RD_MAX_STREAMS][2];
volatile double alsa_input_volume[RD_MAX_CARDS][RD_MAX_PORTS];
volatile double alsa_output_volume[RD_MAX_CARDS][RD_MAX_PORTS][RD_MAX_STREAMS];
volatile double
alsa_passthrough_volume[RD_MAX_CARDS][RD_MAX_PORTS][RD_MAX_PORTS];
volatile double alsa_input_vox[RD_MAX_CARDS][RD_MAX_PORTS];
RDRingBuffer *alsa_play_ring[RD_MAX_CARDS][RD_MAX_STREAMS];
RDRingBuffer *alsa_record_ring[RD_MAX_CARDS][RD_MAX_PORTS];
RDRingBuffer *alsa_passthrough_ring[RD_MAX_CARDS][RD_MAX_PORTS];
volatile bool alsa_playing[RD_MAX_CARDS][RD_MAX_STREAMS];
volatile bool alsa_stopping[RD_MAX_CARDS][RD_MAX_STREAMS];
volatile bool alsa_eof[RD_MAX_CARDS][RD_MAX_STREAMS];
volatile int alsa_output_pos[RD_MAX_CARDS][RD_MAX_STREAMS];
volatile bool alsa_recording[RD_MAX_CARDS][RD_MAX_PORTS];
volatile bool alsa_ready[RD_MAX_CARDS][RD_MAX_PORTS];
void *AlsaCaptureCallback(void *ptr)
{
char alsa_buffer[RINGBUFFER_SIZE];
int modulo;
int16_t in_meter[RD_MAX_PORTS][2];
struct alsa_format *alsa_format=(struct alsa_format *)ptr;
signal(SIGTERM,SigHandler);
signal(SIGINT,SigHandler);
while(!alsa_format->exiting) {
int s=snd_pcm_readi(alsa_format->pcm,alsa_format->card_buffer,
rda->config()->alsaPeriodSize()/(alsa_format->periods*2));
if(((snd_pcm_state(alsa_format->pcm)!=SND_PCM_STATE_RUNNING)&&
(!alsa_format->exiting))||(s<0)) {
snd_pcm_drop (alsa_format->pcm);
snd_pcm_prepare(alsa_format->pcm);
rda->syslog(LOG_DEBUG,"****** ALSA Capture Xrun - Card: %d ******",
alsa_format->card);
}
else {
switch(alsa_format->format) {
case SND_PCM_FORMAT_S16_LE:
modulo=alsa_format->channels;
for(unsigned i=0;i<(alsa_format->channels/2);i++) {
if(alsa_recording[alsa_format->card][i]) {
if(alsa_input_volume[alsa_format->card][i]!=0.0) {
switch(alsa_input_channels[alsa_format->card][i]) {
case 1:
for(int k=0;k<(2*s);k++) {
((int16_t *)alsa_buffer)[k]=
(int16_t)(alsa_input_volume[alsa_format->card][i]*
(double)(((int16_t *)alsa_format->
card_buffer)
[modulo*k+2*i]))+
(int16_t)(alsa_input_volume[alsa_format->card][i]*
(double)(((int16_t *)alsa_format->
card_buffer)
[modulo*k+2*i+1]));
}
alsa_record_ring[alsa_format->card][i]->
write(alsa_buffer,s*sizeof(int16_t));
break;
case 2:
for(int k=0;k<s;k++) {
((int16_t *)alsa_buffer)[2*k]=
(int16_t)(alsa_input_volume[alsa_format->card][i]*
(double)(((int16_t *)alsa_format->
card_buffer)
[modulo*k+2*i]));
((int16_t *)alsa_buffer)[2*k+1]=
(int16_t)(alsa_input_volume[alsa_format->card][i]*
(double)(((int16_t *)alsa_format->
card_buffer)
[modulo*k+2*i+1]));
}
alsa_record_ring[alsa_format->card][i]->
write(alsa_buffer,s*2*sizeof(int16_t));
break;
}
}
}
}
//
// Process Passthroughs
//
for(unsigned i=0;i<alsa_format->channels;i+=2) {
for(unsigned j=0;j<2;j++) {
for(int k=0;k<s;k++) {
((int16_t *)alsa_format->passthrough_buffer)[2*k+j]=
((int16_t *)alsa_format->
card_buffer)[alsa_format->channels*k+i+j];
}
}
alsa_passthrough_ring[alsa_format->card][i/2]->
write(alsa_format->passthrough_buffer,4*s);
}
//
// Process Input Meters
//
for(unsigned i=0;i<alsa_format->channels;i+=2) {
for(unsigned j=0;j<2;j++) {
in_meter[i/2][j]=0;
for(int k=0;k<s;k++) {
if(((int16_t *)alsa_format->
card_buffer)[alsa_format->channels*k+2*i+j]>
in_meter[i][j]) {
in_meter[i][j]=
((int16_t *)alsa_format->
card_buffer)[alsa_format->channels*k+2*i+j];
}
}
alsa_input_meter[alsa_format->card][i/2][j]->
addValue(((double)in_meter[i/2][j])/32768.0);
}
}
break;
case SND_PCM_FORMAT_S32_LE:
modulo=alsa_format->channels*2;
for(unsigned i=0;i<(alsa_format->channels/2);i++) {
if(alsa_recording[alsa_format->card][i]) {
if(alsa_input_volume[alsa_format->card][i]!=0.0) {
switch(alsa_input_channels[alsa_format->card][i]) {
case 1:
for(int k=0;k<(2*s);k++) {
((int16_t *)alsa_buffer)[k]=
(int16_t)(alsa_input_volume[alsa_format->card][i]*
(double)(((int16_t *)alsa_format->
card_buffer)
[modulo*k+4*i+1]))+
(int16_t)(alsa_input_volume[alsa_format->card][i]*
(double)(((int16_t *)alsa_format->
card_buffer)
[modulo*k+4*i+3]));
}
alsa_record_ring[alsa_format->card][i]->
write(alsa_buffer,s*sizeof(int16_t));
break;
case 2:
for(int k=0;k<s;k++) {
((int16_t *)alsa_buffer)[2*k]=
(int16_t)(alsa_input_volume[alsa_format->card][i]*
(double)(((int16_t *)alsa_format->card_buffer)
[modulo*k+4*i+1]));
((int16_t *)alsa_buffer)[2*k+1]=
(int16_t)(alsa_input_volume[alsa_format->card][i]*
(double)(((int16_t *)alsa_format->card_buffer)
[modulo*k+4*i+3]));
}
alsa_record_ring[alsa_format->card][i]->
write(alsa_buffer,s*2*sizeof(int16_t));
break;
}
}
}
}
//
// Process Passthroughs
//
for(unsigned i=0;i<alsa_format->channels;i+=2) {
for(unsigned j=0;j<2;j++) {
for(int k=0;k<s;k++) {
((int32_t *)alsa_format->passthrough_buffer)[2*k+j]=
((int32_t *)alsa_format->
card_buffer)[alsa_format->channels*k+i+j];
}
}
alsa_passthrough_ring[alsa_format->card][i/2]->
write(alsa_format->passthrough_buffer,8*s);
}
//
// Process Input Meters
//
for(unsigned i=0;i<alsa_format->channels;i+=2) {
for(unsigned j=0;j<2;j++) {
in_meter[i/2][j]=0;
for(int k=0;k<s;k++) {
if(((int16_t *)alsa_format->
card_buffer)[alsa_format->channels*2*k+2*i+1+2*j]>
in_meter[i/2][j]) {
in_meter[i/2][j]=
((int16_t *)alsa_format->
card_buffer)[alsa_format->channels*2*k+2*i+1+2*j];
}
}
alsa_input_meter[alsa_format->card][i/2][j]->
addValue(((double)in_meter[i/2][j])/32768.0);
}
}
break;
default:
break;
}
}
}
return 0;
}
void *AlsaPlayCallback(void *ptr)
{
int n=0;
int p;
char alsa_buffer[RINGBUFFER_SIZE];
int modulo;
int16_t out_meter[RD_MAX_PORTS][2];
int16_t stream_out_meter=0;
struct alsa_format *alsa_format=(struct alsa_format *)ptr;
signal(SIGTERM,SigHandler);
signal(SIGINT,SigHandler);
while(!alsa_format->exiting) {
memset(alsa_format->card_buffer,0,alsa_format->card_buffer_size);
switch(alsa_format->format) {
case SND_PCM_FORMAT_S16_LE:
for(unsigned j=0;j<RD_MAX_STREAMS;j++) {
if(alsa_playing[alsa_format->card][j]) {
switch(alsa_output_channels[alsa_format->card][j]) {
case 1:
n=alsa_play_ring[alsa_format->card][j]->
read(alsa_buffer,alsa_format->
buffer_size/alsa_format->periods)/
(2*sizeof(int16_t));
stream_out_meter=0; // Stream Output Meters
for(int k=0;k<n;k++) {
if(abs(((int16_t *)alsa_buffer)[k])>stream_out_meter) {
stream_out_meter=abs(((int16_t *)alsa_buffer)[k]);
}
}
alsa_stream_output_meter[alsa_format->card][j][0]->
addValue(((double)stream_out_meter)/32768.0);
alsa_stream_output_meter[alsa_format->card][j][1]->
addValue(((double)stream_out_meter)/32768.0);
modulo=alsa_format->channels;
for(unsigned i=0;i<(alsa_format->channels/2);i++) {
if(alsa_output_volume[alsa_format->card][i][j]!=0.0) {
for(int k=0;k<(2*n);k++) {
((int16_t *)alsa_format->card_buffer)[modulo*k+2*i]+=
(int16_t)(alsa_output_volume[alsa_format->card][i][j]*
(double)(((int16_t *)alsa_buffer)[k]));
((int16_t *)alsa_format->card_buffer)[modulo*k+2*i+1]+=
(int16_t)(alsa_output_volume[alsa_format->card][i][j]*
(double)(((int16_t *)alsa_buffer)[k]));
}
}
}
n*=2;
break;
case 2:
n=alsa_play_ring[alsa_format->card][j]->
read(alsa_buffer,alsa_format->buffer_size*2/
alsa_format->periods)/(2*sizeof(int16_t));
for(unsigned k=0;k<2;k++) { // Stream Output Meters
stream_out_meter=0;
for(int l=0;l<n;l+=2) {
if(abs(((int16_t *)alsa_buffer)[l+k])>stream_out_meter) {
stream_out_meter=abs(((int16_t *)alsa_buffer)[l+k]);
}
}
alsa_stream_output_meter[alsa_format->card][j][k]->
addValue(((double)stream_out_meter)/32768.0);
}
modulo=alsa_format->channels;
for(unsigned i=0;i<(alsa_format->channels/2);i++) {
if(alsa_output_volume[alsa_format->card][i][j]!=0.0) {
for(int k=0;k<n;k++) {
((int16_t *)alsa_format->card_buffer)[modulo*k+2*i]+=
(int16_t)(alsa_output_volume[alsa_format->card][i][j]*
(double)(((int16_t *)alsa_buffer)[2*k]));
((int16_t *)alsa_format->card_buffer)[modulo*k+2*i+1]+=
(int16_t)(alsa_output_volume[alsa_format->card][i][j]*
(double)(((int16_t *)alsa_buffer)[2*k+1]));
}
}
}
break;
}
alsa_output_pos[alsa_format->card][j]+=n;
if((n==0)&&alsa_eof[alsa_format->card][j]) {
alsa_stopping[alsa_format->card][j]=true;
}
}
}
n=alsa_format->buffer_size/(2*alsa_format->periods);
//
// Process Passthroughs
//
for(unsigned i=0;i<alsa_format->capture_channels;i+=2) {
p=alsa_passthrough_ring[alsa_format->card][i/2]->
read(alsa_format->passthrough_buffer,4*n)/4;
bool zero_volume = true;
for (unsigned j=0;j<alsa_format->channels && zero_volume;j+=1) {
zero_volume = (alsa_passthrough_volume[alsa_format->card][i/2][j] == 0.0);
}
if (!zero_volume) {
for(unsigned j=0;j<alsa_format->channels;j+=2) {
double passthrough_volume = alsa_passthrough_volume[alsa_format->card][i/2][j/2];
if (passthrough_volume != 0.0) {
for(unsigned k=0;k<2;k++) {
for(int l=0;l<p;l++) {
((int16_t *)alsa_format->
card_buffer)[alsa_format->channels*l+j+k]+=
(int16_t)((double)((int16_t *)alsa_format->passthrough_buffer)[2*l+k]*passthrough_volume);
}
}
}
}
}
}
//
// Process Output Meters
//
for(unsigned i=0;i<alsa_format->channels;i+=2) {
unsigned port=i/2;
for(unsigned j=0;j<2;j++) {
out_meter[port][j]=0;
for(unsigned k=0;k<alsa_format->buffer_size;k++) {
int16_t sample = ((int16_t *)alsa_format->
card_buffer)[alsa_format->channels*k+2*i+j];
if(sample> out_meter[i][j]) {
out_meter[i][j]= sample;
}
}
alsa_output_meter[alsa_format->card][i][j]->
addValue(((double)out_meter[i][j])/32768.0);
}
}
break;
case SND_PCM_FORMAT_S32_LE:
for(unsigned j=0;j<RD_MAX_STREAMS;j++) {
if(alsa_playing[alsa_format->card][j]) {
switch(alsa_output_channels[alsa_format->card][j]) {
case 1:
n=alsa_play_ring[alsa_format->card][j]->
read(alsa_buffer,alsa_format->buffer_size/
alsa_format->periods)/(2*sizeof(int16_t));
stream_out_meter=0;
for(int k=0;k<n;k++) { // Stream Output Meters
if(abs(((int16_t *)alsa_buffer)[k])>stream_out_meter) {
stream_out_meter=abs(((int16_t *)alsa_buffer)[k]);
}
}
alsa_stream_output_meter[alsa_format->card][j][0]->
addValue(((double)stream_out_meter)/32768.0);
alsa_stream_output_meter[alsa_format->card][j][1]->
addValue(((double)stream_out_meter)/32768.0);
modulo=alsa_format->channels*2;
for(unsigned i=0;i<(alsa_format->channels/2);i++) {
if(alsa_output_volume[alsa_format->card][i][j]!=0.0) {
for(int k=0;k<(2*n);k++) {
((int16_t *)alsa_format->card_buffer)[modulo*k+4*i+1]+=
(int16_t)(alsa_output_volume[alsa_format->card][i][j]*
(double)(((int16_t *)alsa_buffer)[k]));
((int16_t *)alsa_format->card_buffer)[modulo*k+4*i+3]+=
(int16_t)(alsa_output_volume[alsa_format->card][i][j]*
(double)(((int16_t *)alsa_buffer)[k]));
}
}
}
n*=2;
break;
case 2:
n=alsa_play_ring[alsa_format->card][j]->
read(alsa_buffer,alsa_format->buffer_size*2/
alsa_format->periods)/(2*sizeof(int16_t));
for(unsigned k=0;k<2;k++) { // Stream Output Meters
stream_out_meter=0;
for(int l=0;l<n;l+=2) {
if(abs(((int16_t *)alsa_buffer)[l+k])>stream_out_meter) {
stream_out_meter=abs(((int16_t *)alsa_buffer)[l+k]);
}
}
alsa_stream_output_meter[alsa_format->card][j][k]->
addValue(((double)stream_out_meter)/32768.0);
}
modulo=alsa_format->channels*2;
for(unsigned i=0;i<(alsa_format->channels/2);i++) {
if(alsa_output_volume[alsa_format->card][i][j]!=0.0) {
for(int k=0;k<n;k++) {
((int16_t *)alsa_format->card_buffer)[modulo*k+4*i+1]+=
(int16_t)(alsa_output_volume[alsa_format->card][i][j]*
(double)(((int16_t *)alsa_buffer)[2*k]));
((int16_t *)alsa_format->card_buffer)[modulo*k+4*i+3]+=
(int16_t)(alsa_output_volume[alsa_format->card][i][j]*
(double)(((int16_t *)alsa_buffer)[2*k+1]));
}
}
}
break;
}
alsa_output_pos[alsa_format->card][j]+=n;
if((n==0)&&alsa_eof[alsa_format->card][j]) {
alsa_stopping[alsa_format->card][j]=true;
// Empty the ring buffer
while(alsa_play_ring[alsa_format->card][j]->
read(alsa_buffer,alsa_format->buffer_size*2/
alsa_format->periods)/(2*sizeof(int16_t))>0);
}
}
}
n=alsa_format->buffer_size/(2*alsa_format->periods);
//
// Process Passthroughs
//
for(unsigned i=0;i<alsa_format->capture_channels;i+=2) {
p=alsa_passthrough_ring[alsa_format->card][i/2]->
read(alsa_format->passthrough_buffer,8*n)/8;
bool zero_volume = true;
for (unsigned j=0;j<alsa_format->channels && zero_volume;j+=1) {
zero_volume = (alsa_passthrough_volume[alsa_format->card][i/2][j] == 0.0);
}
if (!zero_volume) {
for(unsigned j=0;j<alsa_format->channels;j+=2) {
double passthrough_volume = alsa_passthrough_volume[alsa_format->card][i/2][j/2];
if (passthrough_volume != 0.0) {
for(unsigned k=0;k<2;k++) {
for(int l=0;l<p;l++) {
((int32_t *)alsa_format->
card_buffer)[alsa_format->channels*l+j+k]+=
(int32_t)((double)((int32_t *)alsa_format->passthrough_buffer)[2*l+k]*passthrough_volume);
}
}
}
}
}
}
//
// Process Output Meters
//
unsigned buffer_width;
buffer_width = (alsa_format->buffer_size*2/alsa_format->periods);
for(unsigned i=0;i<alsa_format->channels;i+=2) {
unsigned port=i/2;
for(unsigned j=0;j<2;j++) {
out_meter[port][j]=0;
for(unsigned k=0; k<buffer_width; k++) {
int16_t sample = ((int16_t *)alsa_format->
card_buffer)[alsa_format->channels*2*k+2*i+1+2*j];
if (sample > out_meter[port][j]) {
out_meter[port][j] = sample;
}
}
alsa_output_meter[alsa_format->card][port][j]->
addValue(((double)out_meter[port][j])/32768.0);
}
}
break;
default:
break;
}
int s=snd_pcm_writei(alsa_format->pcm,alsa_format->card_buffer,n);
if(s!=n) {
if(s<0) {
rda->syslog(LOG_WARNING,
"*** alsa error %d: %s",-s,snd_strerror(s));
}
else {
rda->syslog(LOG_WARNING,
"period size mismatch - wrote %d",s);
}
}
if((snd_pcm_state(alsa_format->pcm)!=SND_PCM_STATE_RUNNING)&&
(!alsa_format->exiting)) {
snd_pcm_drop (alsa_format->pcm);
snd_pcm_prepare(alsa_format->pcm);
rda->syslog(LOG_DEBUG,
"****** ALSA Playout Xrun - Card: %d ******",
alsa_format->card);
}
}
return 0;
}
void DriverAlsa::AlsaInitCallback()
{
int avg_periods=
(330*systemSampleRate())/(1000*rda->config()->alsaPeriodSize());
for(int i=0;i<RD_MAX_CARDS;i++) {
for(int j=0;j<RD_MAX_PORTS;j++) {
alsa_recording[i][j]=false;
alsa_ready[i][j]=false;
alsa_input_volume[i][j]=1.0;
alsa_input_vox[i][j]=0.0;
for(int k=0;k<2;k++) {
alsa_input_meter[i][j][k]=new RDMeterAverage(avg_periods);
alsa_output_meter[i][j][k]=new RDMeterAverage(avg_periods);
}
for(int k=0;k<RD_MAX_STREAMS;k++) {
alsa_output_volume[i][j][k]=1.0;
}
alsa_passthrough_ring[i][j]=new RDRingBuffer(RINGBUFFER_SIZE);
alsa_passthrough_ring[i][j]->reset();
alsa_record_ring[i][j]=NULL;
for(int k=0;k<RD_MAX_PORTS;k++) {
alsa_passthrough_volume[i][j][k]=0.0;
}
}
for(int j=0;j<RD_MAX_STREAMS;j++) {
alsa_play_ring[i][j]=NULL;
alsa_playing[i][j]=false;
for(int k=0;k<2;k++) {
alsa_stream_output_meter[i][j][k]=new RDMeterAverage(avg_periods);
}
}
}
}
#endif // ALSA
DriverAlsa::DriverAlsa(QObject *parent)
: Driver(RDStation::Alsa,parent)
{
#ifdef ALSA
//
// Initialize Data Structures
//
for(int i=0;i<RD_MAX_CARDS;i++) {
for(int j=0;j<RD_MAX_STREAMS;j++) {
alsa_input_volume_db[i][j]=0;
alsa_samples_recorded[i][j]=0;
#ifdef HAVE_MAD
mad_mpeg[i][j]=new unsigned char[16384];
#endif // HAVE_MAD
for(int k=0;k<RD_MAX_PORTS;k++) {
alsa_output_volume_db[i][k][j]=0;
}
}
for(int j=0;j<RD_MAX_PORTS;j++) {
for(int k=0;k<RD_MAX_PORTS;k++) {
alsa_passthrough_volume_db[i][j][k]=RD_MUTE_DEPTH;
}
}
}
//
// Stop & Fade Timers
//
QSignalMapper *stop_mapper=new QSignalMapper(this);
connect(stop_mapper,SIGNAL(mapped(int)),this,SLOT(stopTimerData(int)));
QSignalMapper *fade_mapper=new QSignalMapper(this);
connect(fade_mapper,SIGNAL(mapped(int)),this,SLOT(fadeTimerData(int)));
QSignalMapper *record_mapper=new QSignalMapper(this);
connect(record_mapper,SIGNAL(mapped(int)),this,SLOT(recordTimerData(int)));
for(int i=0;i<RD_MAX_CARDS;i++) {
for(int j=0;j<RD_MAX_STREAMS;j++) {
alsa_stop_timer[i][j]=new QTimer(this);
alsa_stop_timer[i][j]->setSingleShot(true);
stop_mapper->setMapping(alsa_stop_timer[i][j],i*RD_MAX_STREAMS+j);
connect(alsa_stop_timer[i][j],SIGNAL(timeout()),stop_mapper,SLOT(map()));
alsa_fade_timer[i][j]=new QTimer(this);
fade_mapper->setMapping(alsa_fade_timer[i][j],i*RD_MAX_STREAMS+j);
connect(alsa_fade_timer[i][j],SIGNAL(timeout()),fade_mapper,SLOT(map()));
}
for(int j=0;j<RD_MAX_PORTS;j++) {
alsa_record_timer[i][j]=new QTimer(this);
alsa_record_timer[i][j]->setSingleShot(true);
record_mapper->setMapping(alsa_record_timer[i][j],i*RD_MAX_PORTS+j);
connect(alsa_record_timer[i][j],SIGNAL(timeout()),
record_mapper,SLOT(map()));
}
}
//
// Allocate Temporary Buffers
//
AlsaInitCallback();
alsa_wave_buffer=new int16_t[RINGBUFFER_SIZE];
alsa_wave24_buffer=new uint8_t[2*RINGBUFFER_SIZE];
LoadTwoLame();
LoadMad();
#endif // ALSA
}
DriverAlsa::~DriverAlsa()
{
#ifdef ALSA
for(int i=0;i<RD_MAX_CARDS;i++) {
if(hasCard(i)) {
alsa_play_format[i].exiting=true;
pthread_join(alsa_play_format[i].thread,NULL);
snd_pcm_close(alsa_play_format[i].pcm);
if(alsa_capture_format[i].pcm!=NULL) {
alsa_capture_format[i].exiting=true;
pthread_join(alsa_capture_format[i].thread,NULL);
snd_pcm_close(alsa_capture_format[i].pcm);
}
}
}
#endif // ALSA
}
QString DriverAlsa::version() const
{
#ifdef ALSA
return
QString::asprintf("%d.%d.%d",SND_LIB_MAJOR,SND_LIB_MINOR,SND_LIB_SUBMINOR);
#else
return QString();
#endif // ALSA
}
bool DriverAlsa::initialize(unsigned *next_cardnum)
{
#ifdef ALSA
QString dev;
snd_pcm_t *pcm_play_handle;
snd_pcm_t *pcm_capture_handle;
snd_ctl_t *snd_ctl;
snd_ctl_card_info_t *card_info=NULL;
bool pcm_opened=false;
int card=0;
//
// Start Up Interfaces
//
while((*next_cardnum)<RD_MAX_CARDS) {
pcm_opened=false;
alsa_play_format[*next_cardnum].exiting = true;
alsa_capture_format[*next_cardnum].exiting = true;
dev=QString::asprintf("rd%d",card);
if(snd_pcm_open(&pcm_play_handle,dev.toUtf8(),
SND_PCM_STREAM_PLAYBACK,0)==0){
pcm_opened=true;
if(!AlsaStartPlayDevice(dev,*next_cardnum,pcm_play_handle)) {
snd_pcm_close(pcm_play_handle);
}
}
if(snd_pcm_open(&pcm_capture_handle,dev.toUtf8(),
SND_PCM_STREAM_CAPTURE,0)==0) {
pcm_opened=true;
if(!AlsaStartCaptureDevice(dev,*next_cardnum,pcm_capture_handle)) {
snd_pcm_close(pcm_capture_handle);
}
}
if(!pcm_opened) {
return card>0;
}
rda->station()->setCardDriver(*next_cardnum,RDStation::Alsa);
if(snd_ctl_open(&snd_ctl,dev.toUtf8(),0)<0) {
rda->syslog(LOG_INFO,
"no control device found for %s",
dev.toUtf8().constData());
rda->station()->setCardName(*next_cardnum,tr("ALSA Device")+" "+dev);
}
else {
snd_ctl_card_info_malloc(&card_info);
snd_ctl_card_info(snd_ctl,card_info);
rda->station()->
setCardName(*next_cardnum,snd_ctl_card_info_get_longname(card_info));
snd_ctl_close(snd_ctl);
}
alsa_input_port_quantities[*next_cardnum]=
alsa_capture_format[*next_cardnum].channels/RD_DEFAULT_CHANNELS;
rda->station()->setCardInputs(*next_cardnum,
alsa_input_port_quantities.value(*next_cardnum));
alsa_output_port_quantities[*next_cardnum]=
alsa_play_format[*next_cardnum].channels/RD_DEFAULT_CHANNELS;
rda->station()->setCardOutputs(*next_cardnum,
alsa_output_port_quantities.value(*next_cardnum));
card++;
if(!pcm_opened) {
return card>0;
}
addCard(*next_cardnum);
(*next_cardnum)++;
}
return card>0;
#else
return false;
#endif // ALSA
}
int DriverAlsa::inputPortQuantity(int card) const
{
#ifdef ALSA
return alsa_input_port_quantities.value(card);
#else
return 0;
#endif // ALSA
}
int DriverAlsa::outputPortQuantity(int card) const
{
#ifdef ALSA
return alsa_output_port_quantities.value(card);
#else
return 0;
#endif // ALSA
}
bool DriverAlsa::loadPlayback(int card,QString wavename,int *stream)
{
#ifdef ALSA
if(alsa_play_format[card].exiting||((*stream=GetAlsaOutputStream(card))<0)) {
rda->syslog(LOG_DEBUG,"alsaLoadPlayback(%s) GetAlsaOutputStream():%d < 0",
wavename.toUtf8().constData(),*stream);
return false;
}
alsa_play_wave[card][*stream]=new RDWaveFile(wavename);
if(!alsa_play_wave[card][*stream]->openWave()) {
rda->syslog(LOG_DEBUG,"alsaLoadPlayback(%s) openWave() failed to open file",
wavename.toUtf8().constData());
delete alsa_play_wave[card][*stream];
alsa_play_wave[card][*stream]=NULL;
FreeAlsaOutputStream(card,*stream);
*stream=-1;
return false;
}
switch(alsa_play_wave[card][*stream]->getFormatTag()) {
case WAVE_FORMAT_PCM:
case WAVE_FORMAT_VORBIS:
break;
case WAVE_FORMAT_MPEG:
if(!InitMadDecoder(card,*stream,alsa_play_wave[card][*stream])) {
delete alsa_play_wave[card][*stream];
alsa_play_wave[card][*stream]=NULL;
FreeAlsaOutputStream(card,*stream);
*stream=-1;
return false;
}
break;
default:
rda->syslog(LOG_WARNING,
"alsaLoadPlayback(%s) getFormatTag()%d || getBistsPerSample()%d failed",
wavename.toUtf8().constData(),
alsa_play_wave[card][*stream]->getFormatTag(),
alsa_play_wave[card][*stream]->getBitsPerSample());
delete alsa_play_wave[card][*stream];
alsa_play_wave[card][*stream]=NULL;
FreeAlsaOutputStream(card,*stream);
*stream=-1;
return false;
}
alsa_output_channels[card][*stream]=
alsa_play_wave[card][*stream]->getChannels();
alsa_stopping[card][*stream]=false;
alsa_offset[card][*stream]=0;
alsa_output_pos[card][*stream]=0;
alsa_eof[card][*stream]=false;
alsa_play_ring[card][*stream]->reset();
FillAlsaOutputStream(card,*stream);
return true;
#else
return false;
#endif // ALSA
}
bool DriverAlsa::unloadPlayback(int card,int stream)
{
#ifdef ALSA
if(alsa_play_ring[card][stream]==NULL) {
return false;
}
alsa_playing[card][stream]=false;
switch(alsa_play_wave[card][stream]->getFormatTag()) {
case WAVE_FORMAT_MPEG:
FreeMadDecoder(card,stream);
break;
}
alsa_play_wave[card][stream]->closeWave();
delete alsa_play_wave[card][stream];
alsa_play_wave[card][stream]=NULL;
FreeAlsaOutputStream(card,stream);
return true;
#else
return false;
#endif // ALSA
}
bool DriverAlsa::playbackPosition(int card,int stream,unsigned pos)
{
#ifdef ALSA
unsigned offset=0;
if(alsa_play_format[card].exiting){
return false;
}
switch(alsa_play_wave[card][stream]->getFormatTag()) {
case WAVE_FORMAT_PCM:
offset=(unsigned)((double)alsa_play_wave[card][stream]->getSamplesPerSec()*
(double)alsa_play_wave[card][stream]->getBlockAlign()*
(double)pos/1000);
alsa_offset[card][stream]=
offset/alsa_play_wave[card][stream]->getBlockAlign();
offset=
alsa_offset[card][stream]*alsa_play_wave[card][stream]->getBlockAlign();
break;
case WAVE_FORMAT_MPEG:
offset=(unsigned)((double)alsa_play_wave[card][stream]->getSamplesPerSec()*
(double)pos/1000);
alsa_offset[card][stream]=offset/1152*1152;
offset=alsa_offset[card][stream]/1152*
alsa_play_wave[card][stream]->getBlockAlign();
FreeMadDecoder(card,stream);
InitMadDecoder(card,stream,alsa_play_wave[card][stream]);
break;
}
if(alsa_offset[card][stream]>
(int)alsa_play_wave[card][stream]->getSampleLength()) {
return false;
}
alsa_output_pos[card][stream]=0;
alsa_play_wave[card][stream]->seekWave(offset,SEEK_SET);
alsa_eof[card][stream]=false;
alsa_play_ring[card][stream]->reset();
FillAlsaOutputStream(card,stream);
if(alsa_playing[card][stream]) {
alsa_stop_timer[card][stream]->stop();
alsa_stop_timer[card][stream]->
start(alsa_play_wave[card][stream]->getExtTimeLength()-pos);
}
return true;
#else
return false;
#endif // ALSA
}
bool DriverAlsa::play(int card,int stream,int length,int speed,bool pitch,
bool rates)
{
#ifdef ALSA
if((alsa_play_ring[card][stream]==NULL)||
alsa_playing[card][stream]||(speed!=RD_TIMESCALE_DIVISOR)) {
return false;
}
alsa_playing[card][stream]=true;
if(length>0) {
alsa_stop_timer[card][stream]->start(length);
}
statePlayUpdate(card,stream,1);
return true;
#else
return false;
#endif // ALSA
}
bool DriverAlsa::stopPlayback(int card,int stream)
{
#ifdef ALSA
if((alsa_play_ring[card][stream]==NULL)||(!alsa_playing[card][stream])) {
return false;
}
alsa_playing[card][stream]=false;
alsa_play_ring[card][stream]->reset();
alsa_stop_timer[card][stream]->stop();
statePlayUpdate(card,stream,2);
return true;
#else
return false;
#endif // ALSA
}
bool DriverAlsa::timescaleSupported(int card)
{
return false;
}
bool DriverAlsa::loadRecord(int card,int port,int coding,int chans,int samprate,
int bitrate,QString wavename)
{
#ifdef ALSA
alsa_record_wave[card][port]=new RDWaveFile(wavename);
switch(coding) {
case 0: // PCM16
alsa_record_wave[card][port]->setFormatTag(WAVE_FORMAT_PCM);
alsa_record_wave[card][port]->setChannels(chans);
alsa_record_wave[card][port]->setSamplesPerSec(samprate);
alsa_record_wave[card][port]->setBitsPerSample(16);
break;
case 4: // PCM24
alsa_record_wave[card][port]->setFormatTag(WAVE_FORMAT_PCM);
alsa_record_wave[card][port]->setChannels(chans);
alsa_record_wave[card][port]->setSamplesPerSec(samprate);
alsa_record_wave[card][port]->setBitsPerSample(24);
break;
case 2: // MPEG Layer 2
if(!InitTwoLameEncoder(card,port,chans,samprate,bitrate)) {
delete alsa_record_wave[card][port];
alsa_record_wave[card][port]=NULL;
return false;
}
alsa_record_wave[card][port]->setFormatTag(WAVE_FORMAT_MPEG);
alsa_record_wave[card][port]->setChannels(chans);
alsa_record_wave[card][port]->setSamplesPerSec(samprate);
alsa_record_wave[card][port]->setBitsPerSample(16);
alsa_record_wave[card][port]->setHeadLayer(ACM_MPEG_LAYER2);
switch(chans) {
case 1:
alsa_record_wave[card][port]->setHeadMode(ACM_MPEG_SINGLECHANNEL);
break;
case 2:
alsa_record_wave[card][port]->setHeadMode(ACM_MPEG_STEREO);
break;
default:
rda->syslog(LOG_WARNING,
"requested unsupported channel count %d, card: %d, port: %d",
chans,card,port);
delete alsa_record_wave[card][port];
alsa_record_wave[card][port]=NULL;
return false;
}
alsa_record_wave[card][port]->setHeadBitRate(bitrate);
alsa_record_wave[card][port]->setMextChunk(true);
alsa_record_wave[card][port]->setMextHomogenous(true);
alsa_record_wave[card][port]->setMextPaddingUsed(false);
alsa_record_wave[card][port]->setMextHackedBitRate(true);
alsa_record_wave[card][port]->setMextFreeFormat(false);
alsa_record_wave[card][port]->
setMextFrameSize(144*alsa_record_wave[card][port]->getHeadBitRate()/
alsa_record_wave[card][port]->getSamplesPerSec());
alsa_record_wave[card][port]->setMextAncillaryLength(5);
alsa_record_wave[card][port]->setMextLeftEnergyPresent(true);
if(chans>1) {
alsa_record_wave[card][port]->setMextRightEnergyPresent(true);
}
else {
alsa_record_wave[card][port]->setMextRightEnergyPresent(false);
}
alsa_record_wave[card][port]->setMextPrivateDataPresent(false);
break;