Rewrote alsa audio driver, with help from Tim Goetze

This commit is contained in:
Peter Hanappe 2003-03-12 00:58:20 +00:00
parent 52aaa6afc1
commit 5d03d9cad6
5 changed files with 514 additions and 42 deletions

View File

@ -38,7 +38,7 @@ AC_CHECK_LIB(pthread, pthread_create)
dnl Check for header files
AC_HEADER_STDC
AC_CHECK_HEADERS(string.h stdlib.h stdio.h math.h errno.h stdarg.h unistd.h sys/mman.h sys/types.h sys/time.h sys/stat.h fcntl.h sys/socket.h netinet/in.h netinet/tcp.h arpa/inet.h limits.h pthread.h)
AC_CHECK_HEADERS(string.h stdlib.h stdio.h math.h errno.h stdarg.h unistd.h sys/mman.h sys/types.h sys/time.h sys/stat.h fcntl.h sys/socket.h netinet/in.h netinet/tcp.h arpa/inet.h limits.h pthread.h signal.h)
dnl Compiler and machine specs
AC_C_INLINE

View File

@ -72,6 +72,9 @@
/* Define to 1 if you have the <pthread.h> header file. */
#undef HAVE_PTHREAD_H
/* Define to 1 if you have the <signal.h> header file. */
#undef HAVE_SIGNAL_H
/* Define to 1 if you have the <stdarg.h> header file. */
#undef HAVE_STDARG_H

View File

@ -39,12 +39,12 @@ typedef struct _fluid_audriver_definition_t
#if ALSA_SUPPORT
/* fluid_audio_driver_t* new_fluid_alsa_audio_driver(fluid_settings_t* settings, */
/* fluid_synth_t* synth); */
/* fluid_audio_driver_t* new_fluid_alsa_audio_driver2(fluid_settings_t* settings, */
/* fluid_audio_func_t func, void* data); */
/* int delete_fluid_alsa_audio_driver(fluid_audio_driver_t* p); */
/* void fluid_alsa_audio_driver_settings(fluid_settings_t* settings); */
fluid_audio_driver_t* new_fluid_alsa_audio_driver(fluid_settings_t* settings,
fluid_synth_t* synth);
fluid_audio_driver_t* new_fluid_alsa_audio_driver2(fluid_settings_t* settings,
fluid_audio_func_t func, void* data);
int delete_fluid_alsa_audio_driver(fluid_audio_driver_t* p);
void fluid_alsa_audio_driver_settings(fluid_settings_t* settings);
#endif
#if OSS_SUPPORT
@ -110,11 +110,11 @@ fluid_audriver_definition_t fluid_audio_drivers[] = {
fluid_oss_audio_driver_settings },
#endif
#if ALSA_SUPPORT
/* { "alsa", */
/* new_fluid_alsa_audio_driver, */
/* new_fluid_alsa_audio_driver2, */
/* delete_fluid_alsa_audio_driver, */
/* fluid_alsa_audio_driver_settings }, */
{ "alsa",
new_fluid_alsa_audio_driver,
new_fluid_alsa_audio_driver2,
delete_fluid_alsa_audio_driver,
fluid_alsa_audio_driver_settings },
#endif
#if COREAUDIO_SUPPORT
{ "coreaudio",

View File

@ -28,10 +28,11 @@
#include "fluid_midi.h"
#include "fluid_adriver.h"
#include "fluid_mdriver.h"
//#include "fluid_midi_router.h"
#include "fluid_settings.h"
#if ALSA_SUPPORT
#define ALSA_PCM_NEW_HW_PARAMS_API
#include <alsa/asoundlib.h>
#include <pthread.h>
#include <fcntl.h>
@ -53,6 +54,53 @@ extern cca_client_t * fluid_cca_client;
#define BUFFER_LENGTH 512
/** fluid_oss_audio_driver_t
*
* This structure should not be accessed directly. Use audio port
* functions instead.
*/
typedef struct {
fluid_audio_driver_t driver;
snd_pcm_t* pcm;
fluid_audio_func_t callback;
void* data;
int buffer_size;
pthread_t thread;
int cont;
} fluid_alsa_audio_driver_t;
fluid_audio_driver_t* new_fluid_alsa_audio_driver(fluid_settings_t* settings,
fluid_synth_t* synth);
fluid_audio_driver_t* new_fluid_alsa_audio_driver2(fluid_settings_t* settings,
fluid_audio_func_t func, void* data);
int delete_fluid_alsa_audio_driver(fluid_audio_driver_t* p);
void fluid_alsa_audio_driver_settings(fluid_settings_t* settings);
static void* fluid_alsa_audio_run_float(void* d);
static void* fluid_alsa_audio_run_s16(void* d);
struct fluid_alsa_formats_t {
char* name;
snd_pcm_format_t format;
snd_pcm_access_t access;
void* (*run)(void* d);
};
struct fluid_alsa_formats_t fluid_alsa_formats[] = {
{ "float, rw, non interleaved",
SND_PCM_FORMAT_FLOAT,
SND_PCM_ACCESS_RW_NONINTERLEAVED,
fluid_alsa_audio_run_float },
{ "s16, rw, interleaved",
SND_PCM_FORMAT_S16,
SND_PCM_ACCESS_RW_INTERLEAVED,
fluid_alsa_audio_run_s16 },
{ NULL, 0, 0, NULL }
};
/*
* fluid_alsa_rawmidi_driver_t
@ -71,8 +119,8 @@ typedef struct {
fluid_midi_driver_t* new_fluid_alsa_rawmidi_driver(fluid_settings_t* settings,
handle_midi_event_func_t handler,
void* event_handler_data);
handle_midi_event_func_t handler,
void* event_handler_data);
int delete_fluid_alsa_rawmidi_driver(fluid_midi_driver_t* p);
static void* fluid_alsa_midi_run(void* d);
@ -99,6 +147,411 @@ int delete_fluid_alsa_seq_driver(fluid_midi_driver_t* p);
static void* fluid_alsa_seq_run(void* d);
/**************************************************************
*
* Alsa audio driver
*
*/
void fluid_alsa_audio_driver_settings(fluid_settings_t* settings)
{
fluid_settings_register_str(settings, "audio.alsa.device", "default", 0, NULL, NULL);
}
fluid_audio_driver_t*
new_fluid_alsa_audio_driver(fluid_settings_t* settings,
fluid_synth_t* synth)
{
return new_fluid_alsa_audio_driver2(settings,
(fluid_audio_func_t) fluid_synth_process,
synth);
}
fluid_audio_driver_t*
new_fluid_alsa_audio_driver2(fluid_settings_t* settings,
fluid_audio_func_t func, void* data)
{
fluid_alsa_audio_driver_t* dev;
double sample_rate;
int periods, period_size;
char* device;
pthread_attr_t attr;
int sched = SCHED_FIFO;
int i, err, dir = 0;
snd_pcm_hw_params_t* hwparams;
snd_pcm_sw_params_t* swparams = NULL;
snd_pcm_uframes_t uframes;
unsigned int tmp;
dev = FLUID_NEW(fluid_alsa_audio_driver_t);
if (dev == NULL) {
FLUID_LOG(FLUID_ERR, "Out of memory");
return NULL;
}
FLUID_MEMSET(dev, 0, sizeof(fluid_alsa_audio_driver_t));
fluid_settings_getint(settings, "audio.periods", &periods);
fluid_settings_getint(settings, "audio.period-size", &period_size);
fluid_settings_getnum(settings, "synth.sample-rate", &sample_rate);
fluid_settings_getstr(settings, "audio.alsa.device", &device);
dev->data = data;
dev->callback = func;
dev->cont = 1;
dev->buffer_size = period_size;
uframes = period_size;
/* Open the PCM device */
if ((err = snd_pcm_open(&dev->pcm, device, SND_PCM_STREAM_PLAYBACK, SND_PCM_NONBLOCK)) != 0) {
if (err == -EBUSY) {
FLUID_LOG(FLUID_ERR, "The \"%s\" audio device is used by another application", device);
goto error_recovery;
}
}
snd_pcm_hw_params_alloca(&hwparams);
snd_pcm_sw_params_alloca(&swparams);
/* Set hardware parameters. We continue trying access methods and
sample formats until we have one that works. For example, if
memory mapped access fails we try regular IO methods. (not
finished, yet). */
for (i = 0; fluid_alsa_formats[i].name != NULL; i++) {
snd_pcm_hw_params_any(dev->pcm, hwparams);
if (snd_pcm_hw_params_set_access(dev->pcm, hwparams, fluid_alsa_formats[i].access) != 0) {
continue;
}
if (snd_pcm_hw_params_set_format(dev->pcm, hwparams, fluid_alsa_formats[i].format) != 0) {
continue;
}
if (snd_pcm_hw_params_set_channels(dev->pcm, hwparams, 2) != 0) {
FLUID_LOG(FLUID_ERR, "Failed to set the channels");
goto error_recovery;
}
tmp = (unsigned int) sample_rate;
if (snd_pcm_hw_params_set_rate_near(dev->pcm, hwparams, &tmp, &dir) != 0) {
FLUID_LOG(FLUID_ERR, "Failed to set the sample rate");
goto error_recovery;
}
if (dir != 0) {
/* There's currently no way to change the sampling rate of the
synthesizer after it's been created. */
FLUID_LOG(FLUID_WARN, "The sample rate is set to %d, "
"the synthesizer may be out of tune", tmp);
}
if (snd_pcm_hw_params_set_period_size_near(dev->pcm, hwparams, &uframes, &dir) != 0) {
FLUID_LOG(FLUID_ERR, "Failed to set the period size");
goto error_recovery;
}
if (uframes != (unsigned long) period_size) {
FLUID_LOG(FLUID_WARN, "Requested a period size of %d, got %d instead",
period_size, (int) uframes);
dev->buffer_size = (int) uframes;
}
tmp = periods;
if (snd_pcm_hw_params_set_periods_near(dev->pcm, hwparams, &tmp, &dir) != 0) {
FLUID_LOG(FLUID_ERR, "Failed to set the number of periods");
goto error_recovery;
}
if (tmp != (unsigned int) periods) {
FLUID_LOG(FLUID_WARN, "Requested %d periods, got %d instead",
periods, (int) tmp);
}
if (snd_pcm_hw_params(dev->pcm, hwparams) != 0) {
FLUID_LOG(FLUID_WARN, "Audio device hardware configuration failed");
continue;
}
break;
}
if (fluid_alsa_formats[i].name == NULL) {
FLUID_LOG(FLUID_ERR, "Failed to find a workable audio format");
goto error_recovery;
}
printf("** Using format %s\n", fluid_alsa_formats[i].name);
/* Set the software params */
snd_pcm_sw_params_current(dev->pcm, swparams);
if (snd_pcm_sw_params_set_start_threshold(dev->pcm, swparams, period_size) != 0) {
FLUID_LOG(FLUID_ERR, "Cannot turn off start threshold.");
}
if (snd_pcm_sw_params_set_stop_threshold(dev->pcm, swparams, ~0u) != 0) {
FLUID_LOG(FLUID_ERR, "Cannot turn off stop threshold.");
}
if (snd_pcm_sw_params_set_silence_threshold(dev->pcm, swparams, 0) != 0) {
FLUID_LOG(FLUID_ERR, "Cannot set 0 silence threshold.");
}
if (snd_pcm_sw_params_set_silence_size(dev->pcm, swparams, 0) != 0) {
FLUID_LOG(FLUID_ERR, "Cannot set 0 silence size.");
}
if (snd_pcm_sw_params_set_avail_min(dev->pcm, swparams, period_size / 2) != 0) {
FLUID_LOG(FLUID_ERR, "Software setup for minimum available frames failed.");
}
if (snd_pcm_sw_params(dev->pcm, swparams) != 0) {
FLUID_LOG(FLUID_ERR, "Software setup failed.");
}
/* Create the audio thread */
if (pthread_attr_init(&attr)) {
FLUID_LOG(FLUID_ERR, "Couldn't initialize audio thread attributes");
goto error_recovery;
}
/* The pthread_create man page explains that
pthread_attr_setschedpolicy returns an error if the user is not
permitted the set SCHED_FIFO. It seems however that no error is
returned but pthread_create fails instead. That's why I try to
create the thread twice in a while loop. */
while (1) {
err = pthread_attr_setschedpolicy(&attr, sched);
if (err) {
FLUID_LOG(FLUID_WARN, "Couldn't set high priority scheduling for the audio output");
if (sched == SCHED_FIFO) {
sched = SCHED_OTHER;
continue;
} else {
FLUID_LOG(FLUID_ERR, "Couldn't set scheduling policy.");
goto error_recovery;
}
}
err = pthread_create(&dev->thread, &attr, fluid_alsa_formats[i].run, (void*) dev);
if (err) {
FLUID_LOG(FLUID_WARN, "Couldn't set high priority scheduling for the audio output");
if (sched == SCHED_FIFO) {
sched = SCHED_OTHER;
continue;
} else {
FLUID_LOG(FLUID_PANIC, "Couldn't create the audio thread.");
goto error_recovery;
}
}
break;
}
return (fluid_audio_driver_t*) dev;
error_recovery:
delete_fluid_alsa_audio_driver((fluid_audio_driver_t*) dev);
return NULL;
}
int delete_fluid_alsa_audio_driver(fluid_audio_driver_t* p)
{
fluid_alsa_audio_driver_t* dev = (fluid_alsa_audio_driver_t*) p;
if (dev == NULL) {
return FLUID_OK;
}
dev->cont = 0;
if (dev->thread) {
if (pthread_join(dev->thread, NULL)) {
FLUID_LOG(FLUID_ERR, "Failed to join the audio thread");
return FLUID_FAILED;
}
}
if (dev->pcm) {
snd_pcm_state_t state = snd_pcm_state(dev->pcm);
if ((state == SND_PCM_STATE_RUNNING)
|| (state == SND_PCM_STATE_XRUN)
|| (state == SND_PCM_STATE_SUSPENDED)
|| (state == SND_PCM_STATE_PAUSED)) {
snd_pcm_drop(dev->pcm);
}
}
return FLUID_OK;
}
static void* fluid_alsa_audio_run_float(void* d)
{
fluid_alsa_audio_driver_t* dev = (fluid_alsa_audio_driver_t*) d;
float* left;
float* right;
float* handle[2];
int n, buffer_size, offset;
buffer_size = dev->buffer_size;
left = FLUID_ARRAY(float, buffer_size);
right = FLUID_ARRAY(float, buffer_size);
if ((left == NULL) || (right == NULL)) {
FLUID_LOG(FLUID_ERR, "Out of memory.");
return NULL;
}
handle[0] = left;
handle[1] = right;
if (snd_pcm_prepare(dev->pcm) != 0) {
FLUID_LOG(FLUID_ERR, "Failed to prepare the audio device");
goto error_recovery;
}
while (dev->cont) {
handle[0] = left;
handle[1] = right;
(*dev->callback)(dev->data, buffer_size, 0, NULL, 2, handle);
offset = 0;
while (offset < buffer_size) {
handle[0] = left + offset;
handle[1] = right + offset;
n = snd_pcm_writen(dev->pcm, (void**) handle, buffer_size - offset);
if (n == -EAGAIN) {
snd_pcm_wait(dev->pcm, 1);
} else if ((n == -EPIPE) || (n == -EBADFD)) {
if (snd_pcm_prepare(dev->pcm) != 0) {
FLUID_LOG(FLUID_ERR, "Failed to prepare the audio device");
goto error_recovery;
}
} else if (n == -ESTRPIPE) {
if ((snd_pcm_resume(dev->pcm) != 0)
&& (snd_pcm_prepare(dev->pcm) != 0)) {
FLUID_LOG(FLUID_ERR, "Failed to resume the audio device");
goto error_recovery;
}
} else if (n < 0) {
FLUID_LOG(FLUID_ERR, "The audio device error: %s", snd_strerror(n));
goto error_recovery;
} else {
offset += n;
}
}
}
error_recovery:
FLUID_FREE(left);
FLUID_FREE(right);
return NULL;
}
static void* fluid_alsa_audio_run_s16(void* d)
{
fluid_alsa_audio_driver_t* dev = (fluid_alsa_audio_driver_t*) d;
float* left;
float* right;
short* buf;
float* handle[2];
int i, k, n, buffer_size, offset;
float s;
buffer_size = dev->buffer_size;
left = FLUID_ARRAY(float, buffer_size);
right = FLUID_ARRAY(float, buffer_size);
buf = FLUID_ARRAY(short, 2 * buffer_size);
if ((left == NULL) || (right == NULL) || (buf == NULL)) {
FLUID_LOG(FLUID_ERR, "Out of memory.");
return NULL;
}
handle[0] = left;
handle[1] = right;
if (snd_pcm_prepare(dev->pcm) != 0) {
FLUID_LOG(FLUID_ERR, "Failed to prepare the audio device");
goto error_recovery;
}
while (dev->cont) {
handle[0] = left;
handle[1] = right;
(*dev->callback)(dev->data, buffer_size, 0, NULL, 2, handle);
for (i = 0, k = 0; i < buffer_size; i++, k += 2) {
s = 32768.0 * left[i];
fluid_clip(s, -32768.0, 32767.0);
buf[k] = (short) s;
}
for (i = 0, k = 1; i < buffer_size; i++, k += 2) {
s = 32768.0 * right[i];
fluid_clip(s, -32768.0, 32767.0);
buf[k] = (short) s;
}
offset = 0;
while (offset < buffer_size) {
n = snd_pcm_writei(dev->pcm, (void*) (buf + 2 * offset), buffer_size - offset);
if (n == -EAGAIN) {
snd_pcm_wait(dev->pcm, 1);
} else if ((n == -EPIPE) || (n == -EBADFD)) {
if (snd_pcm_prepare(dev->pcm) != 0) {
FLUID_LOG(FLUID_ERR, "Failed to prepare the audio device");
goto error_recovery;
}
} else if (n == -ESTRPIPE) {
if ((snd_pcm_resume(dev->pcm) != 0)
&& (snd_pcm_prepare(dev->pcm) != 0)) {
FLUID_LOG(FLUID_ERR, "Failed to resume the audio device");
goto error_recovery;
}
} else if (n < 0) {
FLUID_LOG(FLUID_ERR, "The audio device error: %s", snd_strerror(n));
goto error_recovery;
} else {
offset += n;
}
}
}
error_recovery:
FLUID_FREE(left);
FLUID_FREE(right);
FLUID_FREE(buf);
return NULL;
}
/**************************************************************
*

View File

@ -42,6 +42,10 @@
#include "config.h"
#endif
#ifdef HAVE_SIGNAL_H
#include "signal.h"
#endif
#ifdef HAVE_LADCCA
#include <pthread.h>
#include <ladcca/ladcca.h>
@ -85,7 +89,11 @@ extern char *optarg;
extern int optind, opterr, optopt;
#endif
/* don't shoot me */
/* is_number
*
* don't shoot me
*/
int is_number(char *a)
{
for (; *a != 0; a++) {
@ -96,7 +104,9 @@ int is_number(char *a)
return 1;
}
/* Purpose:
/* process_o_cmd_line_option
*
* Purpose:
* Process a command line option -o setting=value,
* for example: -o synth.polyhony=16
*/
@ -123,6 +133,20 @@ void process_o_cmd_line_option(fluid_settings_t* settings, char* optarg){
};
}
#ifdef HAVE_SIGNAL_H
/*
* handle_signal
*/
void handle_signal(int sig_num)
{
}
#endif
/*
* main
*/
int main(int argc, char** argv)
{
fluid_settings_t* settings;
@ -184,10 +208,6 @@ int main(int argc, char** argv)
{"no-shell", 0, 0, 'i'},
{"version", 0, 0, 'V'},
{"option", 1, 0, 'o'},
/* {"midi-device", 1, 0, 'M'}, */
/* {"audio-device", 1, 0, 'A'}, */
/* {"pid-synth-name", 1, 0, 'p'}, */
/* {"synth-name", 1, 0, 's'}, */
{0, 0, 0, 0}
};
@ -211,18 +231,6 @@ int main(int argc, char** argv)
case 'a':
fluid_settings_setstr(settings, "audio.driver", optarg);
break;
/* case 'M': */
/* midi_device = optarg; */
/* break; */
/* case 'A': */
/* settings.adevice = optarg; */
/* break; */
/* case 's': */
/* midi_id = optarg; */
/* break; */
/* case 'p': */
/* midi_id = "pid"; */
/* break; */
case 'j':
fluid_settings_setint(settings, "audio.jack.autoconnect", 1);
break;
@ -478,7 +486,11 @@ int main(int argc, char** argv)
}
}
}
#ifdef HAVE_SIGNAL_H
/* signal(SIGINT, handle_signal); */
#endif
/* start the synthesis thread */
adriver = new_fluid_audio_driver(settings, synth);
if (adriver == NULL) {
@ -625,6 +637,9 @@ static fluid_cmd_handler_t* newclient(void* data, char* addr)
}
/*
* print_usage
*/
void
print_usage()
{
@ -633,6 +648,9 @@ print_usage()
exit(0);
}
/*
* print_welcome
*/
void
print_welcome()
{
@ -646,6 +664,9 @@ print_welcome()
}
/*
* print_version
*/
void
print_version()
{
@ -653,6 +674,9 @@ print_version()
exit(0);
}
/*
* print_help
*/
void
print_help()
{
@ -677,14 +701,6 @@ print_help()
" Number of audio buffers\n\n");
printf(" -r, --sample-rate\n"
" Set the sample rate\n\n");
/* printf(" -M, --midi-device=[device]\n" */
/* " The name of the midi device to use\n\n"); */
/* printf(" -A, --audio-device=[device]\n" */
/* " The audio device\n\n"); */
/* printf(" -s, --synth-name=[name]\n" */
/* " A name to append to the alsa synth name (-p takes precedence)\n\n"); */
/* printf(" -p, --pid-synth-name\n" */
/* " Append the pid to the alsa synth name\n\n"); */
printf(" -R, --reverb\n"
" Turn the reverb on or off [0|1|yes|no, default = on]\n\n");
printf(" -C, --chorus\n"