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path: root/src/audio_out/audio_oss_out.c
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Diffstat (limited to 'src/audio_out/audio_oss_out.c')
-rw-r--r--src/audio_out/audio_oss_out.c255
1 files changed, 137 insertions, 118 deletions
diff --git a/src/audio_out/audio_oss_out.c b/src/audio_out/audio_oss_out.c
index 82227e5b2..76abc62e8 100644
--- a/src/audio_out/audio_oss_out.c
+++ b/src/audio_out/audio_oss_out.c
@@ -17,7 +17,7 @@
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*
- * $Id: audio_oss_out.c,v 1.31 2001/08/22 10:51:05 jcdutton Exp $
+ * $Id: audio_oss_out.c,v 1.32 2001/08/23 21:40:05 guenter Exp $
*
* 20-8-2001 First implementation of Audio sync and Audio driver separation.
* Copyright (C) 2001 James Courtier-Dutton James@superbug.demon.co.uk
@@ -32,7 +32,7 @@
* when dealing with audio_bytes instead of audio_frames.
*
* The number of samples passed to/from the audio driver is also sent in units of audio_frames.
- * `
+ *
*/
/* required for swab() */
@@ -110,7 +110,6 @@ typedef struct oss_driver_s {
int mode;
int32_t output_sample_rate, input_sample_rate;
- double sample_rate_factor;
uint32_t num_channels;
uint32_t bits_per_sample;
uint32_t bytes_per_frame;
@@ -118,52 +117,53 @@ typedef struct oss_driver_s {
int audio_started;
int audio_has_realtime; /* OSS driver supports real-time */
+ int static_delay; /* estimated delay for non-realtime drivers */
} oss_driver_t;
/*
* open the audio device for writing to
*/
-static int ao_oss_open(ao_driver_t *self_gen,
- uint32_t bits, uint32_t rate, int mode)
+static int ao_oss_open(ao_driver_t *this_gen,
+ uint32_t bits, uint32_t rate, int mode)
{
- oss_driver_t *self = (oss_driver_t *) self_gen;
+ oss_driver_t *this = (oss_driver_t *) this_gen;
int tmp;
printf ("audio_oss_out: ao_open rate=%d, mode=%d\n", rate, mode);
- if ( (mode & self->capabilities) == 0 ) {
+ if ( (mode & this->capabilities) == 0 ) {
printf ("audio_oss_out: unsupported mode %08x\n", mode);
- return -1;
+ return 0;
}
- if (self->audio_fd > -1) {
+ if (this->audio_fd > -1) {
- if ( (mode == self->mode) && (rate == self->input_sample_rate) ) {
- return 1;
+ if ( (mode == this->mode) && (rate == this->input_sample_rate) ) {
+ return this->output_sample_rate;
}
- close (self->audio_fd);
+ close (this->audio_fd);
}
- self->mode = mode;
- self->input_sample_rate = rate;
- self->bits_per_sample = bits;
- self->bytes_in_buffer = 0;
- self->audio_started = 0;
+ this->mode = mode;
+ this->input_sample_rate = rate;
+ this->bits_per_sample = bits;
+ this->bytes_in_buffer = 0;
+ this->audio_started = 0;
/*
* open audio device
*/
- self->audio_fd=open(self->audio_dev,O_WRONLY|O_NDELAY);
- if(self->audio_fd < 0) {
+ this->audio_fd=open(this->audio_dev,O_WRONLY|O_NDELAY);
+ if(this->audio_fd < 0) {
printf("audio_oss_out: Opening audio device %s: %s\n",
- self->audio_dev, strerror(errno));
- return -1;
+ this->audio_dev, strerror(errno));
+ return 0;
}
/* We wanted non blocking open but now put it back to normal */
- fcntl(self->audio_fd, F_SETFL, fcntl(self->audio_fd, F_GETFL)&~FNDELAY);
+ fcntl(this->audio_fd, F_SETFL, fcntl(this->audio_fd, F_GETFL)&~FNDELAY);
/*
* configure audio device
@@ -171,29 +171,29 @@ static int ao_oss_open(ao_driver_t *self_gen,
*/
if(!(mode & AO_CAP_MODE_AC3)) {
tmp = (mode & AO_CAP_MODE_STEREO) ? 1 : 0;
- ioctl(self->audio_fd,SNDCTL_DSP_STEREO,&tmp);
+ ioctl(this->audio_fd,SNDCTL_DSP_STEREO,&tmp);
tmp = bits;
- ioctl(self->audio_fd,SNDCTL_DSP_SAMPLESIZE,&tmp);
+ ioctl(this->audio_fd,SNDCTL_DSP_SAMPLESIZE,&tmp);
- tmp = self->input_sample_rate;
+ tmp = this->input_sample_rate;
#ifdef FORCE_44K_MAX
if(tmp > 44100)
tmp = 44100;
#endif
- if (ioctl(self->audio_fd,SNDCTL_DSP_SPEED, &tmp) == -1) {
+ if (ioctl(this->audio_fd,SNDCTL_DSP_SPEED, &tmp) == -1) {
- printf ("audio_oss_out: warning: sampling rate %d Hz not supported, trying 44100 Hz\n", self->input_sample_rate);
+ printf ("audio_oss_out: warning: sampling rate %d Hz not supported, trying 44100 Hz\n", this->input_sample_rate);
tmp = 44100;
- if (ioctl(self->audio_fd,SNDCTL_DSP_SPEED, &tmp) == -1) {
+ if (ioctl(this->audio_fd,SNDCTL_DSP_SPEED, &tmp) == -1) {
printf ("audio_oss_out: error: 44100 Hz sampling rate not supported\n");
- return -1;
+ return 0;
}
}
- self->output_sample_rate = tmp;
+ this->output_sample_rate = tmp;
xprintf (VERBOSE|AUDIO, "audio_oss_out: audio rate : %d requested, %d provided by device/sec\n",
- self->input_sample_rate, self->output_sample_rate);
+ this->input_sample_rate, this->output_sample_rate);
}
/*
* set number of channels / ac3 throughput
@@ -202,43 +202,43 @@ static int ao_oss_open(ao_driver_t *self_gen,
switch (mode) {
case AO_CAP_MODE_MONO:
tmp = 1;
- ioctl(self->audio_fd, SNDCTL_DSP_CHANNELS, &tmp);
- self->num_channels = tmp;
+ ioctl(this->audio_fd, SNDCTL_DSP_CHANNELS, &tmp);
+ this->num_channels = tmp;
break;
case AO_CAP_MODE_STEREO:
tmp = 2;
- ioctl(self->audio_fd, SNDCTL_DSP_CHANNELS, &tmp);
- self->num_channels = tmp;
+ ioctl(this->audio_fd, SNDCTL_DSP_CHANNELS, &tmp);
+ this->num_channels = tmp;
break;
case AO_CAP_MODE_4CHANNEL:
tmp = 4;
- ioctl(self->audio_fd, SNDCTL_DSP_CHANNELS, &tmp);
- self->num_channels = tmp;
+ ioctl(this->audio_fd, SNDCTL_DSP_CHANNELS, &tmp);
+ this->num_channels = tmp;
break;
case AO_CAP_MODE_5CHANNEL:
tmp = 5;
- ioctl(self->audio_fd, SNDCTL_DSP_CHANNELS, &tmp);
- self->num_channels = tmp;
+ ioctl(this->audio_fd, SNDCTL_DSP_CHANNELS, &tmp);
+ this->num_channels = tmp;
break;
case AO_CAP_MODE_5_1CHANNEL:
tmp = 6;
- ioctl(self->audio_fd, SNDCTL_DSP_CHANNELS, &tmp);
- self->num_channels = tmp;
+ ioctl(this->audio_fd, SNDCTL_DSP_CHANNELS, &tmp);
+ this->num_channels = tmp;
break;
case AO_CAP_MODE_AC3:
tmp = AFMT_AC3;
- if (ioctl(self->audio_fd, SNDCTL_DSP_SETFMT, &tmp) < 0 || tmp != AFMT_AC3) {
+ if (ioctl(this->audio_fd, SNDCTL_DSP_SETFMT, &tmp) < 0 || tmp != AFMT_AC3) {
printf("audio_oss_out: AC3 SNDCTL_DSP_SETFMT failed. %d\n",tmp);
- return -1;
+ return 0;
}
- self->num_channels = 2; /* FIXME: is this correct ? */
- self->output_sample_rate = self->input_sample_rate;
+ this->num_channels = 2; /* FIXME: is this correct ? */
+ this->output_sample_rate = this->input_sample_rate;
printf ("audio_oss_out : AO_CAP_MODE_AC3\n");
break;
}
- printf ("audio_oss_out : %d channels output\n",self->num_channels);
- self->bytes_per_frame=(self->bits_per_sample*self->num_channels)/8;
+ printf ("audio_oss_out : %d channels output\n",this->num_channels);
+ this->bytes_per_frame=(this->bits_per_sample*this->num_channels)/8;
/*
* audio buffer size handling
@@ -257,18 +257,18 @@ static int ao_oss_open(ao_driver_t *self_gen,
xprintf (VERBOSE|AUDIO, "Audio buffer fragment info : %x\n",tmp);
- ioctl(self->audio_fd,SNDCTL_DSP_SETFRAGMENT,&tmp);
+ ioctl(this->audio_fd,SNDCTL_DSP_SETFRAGMENT,&tmp);
*/
/*
* Final check of realtime capability, make sure GETOPTR
* doesn't return an error.
*/
- if ( self->audio_has_realtime && !checked_getoptr ) {
+ if ( this->audio_has_realtime && !checked_getoptr ) {
count_info info;
- int ret = ioctl(self->audio_fd, SNDCTL_DSP_GETOPTR, &info);
+ int ret = ioctl(this->audio_fd, SNDCTL_DSP_GETOPTR, &info);
if ( ret == -1 && errno == EINVAL ) {
- self->audio_has_realtime = 0;
+ this->audio_has_realtime = 0;
printf("audio_oss_out: Audio driver SNDCTL_DSP_GETOPTR reports %s,"
" disabling realtime sync...\n", strerror(errno) );
printf("audio_oss_out: ...Will use video master clock for soft-sync instead\n");
@@ -277,27 +277,42 @@ static int ao_oss_open(ao_driver_t *self_gen,
checked_getoptr = 1;
}
- return 1;
+ return this->output_sample_rate;
}
-static int ao_oss_num_channels(ao_driver_t *self_gen)
+static int ao_oss_num_channels(ao_driver_t *this_gen)
{
- oss_driver_t *self = (oss_driver_t *) self_gen;
- return self->num_channels;
+ oss_driver_t *this = (oss_driver_t *) this_gen;
+ return this->num_channels;
}
-static int ao_oss_bytes_per_frame(ao_driver_t *self_gen)
+static int ao_oss_bytes_per_frame(ao_driver_t *this_gen)
{
- oss_driver_t *self = (oss_driver_t *) self_gen;
- return self->bytes_per_frame;
+ oss_driver_t *this = (oss_driver_t *) this_gen;
+ return this->bytes_per_frame;
}
-static int ao_oss_delay(ao_driver_t *self_gen)
+static int ao_oss_delay(ao_driver_t *this_gen)
{
- count_info info;
- oss_driver_t *self = (oss_driver_t *) self_gen;
- ioctl (self->audio_fd, SNDCTL_DSP_GETOPTR, &info);
- return info.bytes / self->bytes_per_frame;
+ count_info info;
+ oss_driver_t *this = (oss_driver_t *) this_gen;
+ int bytes_left;
+
+ if (this->audio_has_realtime) {
+ ioctl (this->audio_fd, SNDCTL_DSP_GETOPTR, &info);
+
+ /* calc delay */
+
+ bytes_left = this->bytes_in_buffer - info.bytes;
+
+ if (bytes_left<=0) /* buffer ran dry */
+ bytes_left = 0;
+ } else {
+ bytes_left = this->static_delay;
+ }
+
+
+ return bytes_left / this->bytes_per_frame;
}
/* Write audio samples
@@ -305,41 +320,43 @@ static int ao_oss_delay(ao_driver_t *self_gen)
* audio frames are equivalent one sample on each channel.
* I.E. Stereo 16 bits audio frames are 4 bytes.
*/
-static int ao_oss_write(ao_driver_t *self_gen,
- int16_t* frame_buffer, uint32_t num_frames)
+static int ao_oss_write(ao_driver_t *this_gen,
+ int16_t* frame_buffer, uint32_t num_frames)
{
- oss_driver_t *self = (oss_driver_t *) self_gen;
- return write(self->audio_fd, frame_buffer, num_frames * self->bytes_per_frame);
+ oss_driver_t *this = (oss_driver_t *) this_gen;
+
+ this->bytes_in_buffer += num_frames * this->bytes_per_frame;
+ return write(this->audio_fd, frame_buffer, num_frames * this->bytes_per_frame);
}
-static void ao_oss_close(ao_driver_t *self_gen)
+static void ao_oss_close(ao_driver_t *this_gen)
{
- oss_driver_t *self = (oss_driver_t *) self_gen;
- close(self->audio_fd);
- self->audio_fd = -1;
+ oss_driver_t *this = (oss_driver_t *) this_gen;
+ close(this->audio_fd);
+ this->audio_fd = -1;
}
-static uint32_t ao_oss_get_capabilities (ao_driver_t *self_gen) {
- oss_driver_t *self = (oss_driver_t *) self_gen;
- return self->capabilities;
+static uint32_t ao_oss_get_capabilities (ao_driver_t *this_gen) {
+ oss_driver_t *this = (oss_driver_t *) this_gen;
+ return this->capabilities;
}
-static void ao_oss_exit(ao_driver_t *self_gen)
+static void ao_oss_exit(ao_driver_t *this_gen)
{
- oss_driver_t *self = (oss_driver_t *) self_gen;
+ oss_driver_t *this = (oss_driver_t *) this_gen;
- if (self->audio_fd != -1)
- close(self->audio_fd);
+ if (this->audio_fd != -1)
+ close(this->audio_fd);
- free (self);
+ free (this);
}
/*
*
*/
-static int ao_oss_get_property (ao_driver_t *self_gen, int property) {
- oss_driver_t *self = (oss_driver_t *) self;
+static int ao_oss_get_property (ao_driver_t *this_gen, int property) {
+ oss_driver_t *this = (oss_driver_t *) this;
/* FIXME: implement some properties
switch(property) {
@@ -357,8 +374,8 @@ static int ao_oss_get_property (ao_driver_t *self_gen, int property) {
/*
*
*/
-static int ao_oss_set_property (ao_driver_t *self_gen, int property, int value) {
- oss_driver_t *self = (oss_driver_t *) self;
+static int ao_oss_set_property (ao_driver_t *this_gen, int property, int value) {
+ oss_driver_t *this = (oss_driver_t *) this;
/* FIXME: Implement property support.
switch(property) {
@@ -376,7 +393,7 @@ static int ao_oss_set_property (ao_driver_t *self_gen, int property, int value)
ao_driver_t *init_audio_out_plugin (config_values_t *config) {
- oss_driver_t *self;
+ oss_driver_t *this;
int caps;
#ifdef CONFIG_DEVFS_FS
char devname[] = "/dev/sound/dsp\0\0\0";
@@ -389,7 +406,7 @@ ao_driver_t *init_audio_out_plugin (config_values_t *config) {
int audio_fd;
int num_channels, status, arg;
- self = (oss_driver_t *) malloc (sizeof (oss_driver_t));
+ this = (oss_driver_t *) malloc (sizeof (oss_driver_t));
/*
* find best device driver/channel
@@ -402,11 +419,11 @@ ao_driver_t *init_audio_out_plugin (config_values_t *config) {
devnum = config->lookup_int (config, "oss_device_num", -1);
if (devnum >= 0) {
- sprintf (self->audio_dev, DSP_TEMPLATE, devnum);
+ sprintf (this->audio_dev, DSP_TEMPLATE, devnum);
devnum = 30; /* skip while loop */
} else {
devnum = 0;
- sprintf (self->audio_dev, "/dev/dsp");
+ sprintf (this->audio_dev, "/dev/dsp");
}
while (devnum<16) {
@@ -420,14 +437,14 @@ ao_driver_t *init_audio_out_plugin (config_values_t *config) {
rate = 48000;
ioctl(audio_fd,SNDCTL_DSP_SPEED, &rate);
if (rate>best_rate) {
- strncpy (self->audio_dev, devname, 19);
+ strncpy (this->audio_dev, devname, 19);
best_rate = rate;
}
close (audio_fd);
} /*else
printf("audio_oss_out: opening audio device %s failed:\n%s\n",
- self->audio_dev, strerror(errno));
+ this->audio_dev, strerror(errno));
*/
sprintf(devname, DSP_TEMPLATE, devnum);
@@ -438,18 +455,18 @@ ao_driver_t *init_audio_out_plugin (config_values_t *config) {
* open that device
*/
- audio_fd=open(self->audio_dev, O_WRONLY|O_NDELAY);
+ audio_fd=open(this->audio_dev, O_WRONLY|O_NDELAY);
if(audio_fd < 0)
{
printf("audio_oss_out: opening audio device %s failed:\n%s\n",
- self->audio_dev, strerror(errno));
+ this->audio_dev, strerror(errno));
- free (self);
+ free (this);
return NULL;
} else
- xprintf (VERBOSE|AUDIO, " %s\n", self->audio_dev);
+ xprintf (VERBOSE|AUDIO, " %s\n", this->audio_dev);
/*
* set up driver to reasonable values for capabilities tests
@@ -468,38 +485,38 @@ ao_driver_t *init_audio_out_plugin (config_values_t *config) {
if ((caps & DSP_CAP_REALTIME) > 0) {
xprintf (VERBOSE|AUDIO, "audio_oss_out : realtime check: passed :-)\n");
- self->audio_has_realtime = 1;
+ this->audio_has_realtime = 1;
} else {
printf ("audio_oss_out : realtime check: *FAILED* :-(((((\n");
- self->audio_has_realtime = 0;
+ this->audio_has_realtime = 0;
}
- if( !self->audio_has_realtime ) {
+ if( !this->audio_has_realtime ) {
printf("audio_oss_out: Audio driver realtime sync disabled...\n");
printf("audio_oss_out: ...Will use video master clock for soft-sync instead\n");
printf("audio_oss_out: ...There may be audio/video synchronization issues\n");
}
- self->capabilities = 0;
+ this->capabilities = 0;
printf ("audio_oss_out : supported modes are ");
num_channels = 1;
status = ioctl(audio_fd, SNDCTL_DSP_CHANNELS, &num_channels);
if ( (status != -1) && (num_channels==1) ) {
- self->capabilities |= AO_CAP_MODE_MONO;
+ this->capabilities |= AO_CAP_MODE_MONO;
printf ("mono ");
}
num_channels = 2;
status = ioctl(audio_fd, SNDCTL_DSP_CHANNELS, &num_channels);
if ( (status != -1) && (num_channels==2) ) {
- self->capabilities |= AO_CAP_MODE_STEREO;
+ this->capabilities |= AO_CAP_MODE_STEREO;
printf ("stereo ");
}
num_channels = 4;
status = ioctl(audio_fd, SNDCTL_DSP_CHANNELS, &num_channels);
if ( (status != -1) && (num_channels==4) ) {
if (config->lookup_int (config, "four_channel", 0)) {
- self->capabilities |= AO_CAP_MODE_4CHANNEL;
+ this->capabilities |= AO_CAP_MODE_4CHANNEL;
printf ("4-channel ");
} else
printf ("(4-channel not enabled in .xinerc) " );
@@ -508,7 +525,7 @@ ao_driver_t *init_audio_out_plugin (config_values_t *config) {
status = ioctl(audio_fd, SNDCTL_DSP_CHANNELS, &num_channels);
if ( (status != -1) && (num_channels==5) ) {
if (config->lookup_int (config, "five_channel", 0)) {
- self->capabilities |= AO_CAP_MODE_5CHANNEL;
+ this->capabilities |= AO_CAP_MODE_5CHANNEL;
printf ("5-channel ");
} else
printf ("(5-channel not enabled in .xinerc) " );
@@ -517,7 +534,7 @@ ao_driver_t *init_audio_out_plugin (config_values_t *config) {
status = ioctl(audio_fd, SNDCTL_DSP_CHANNELS, &num_channels);
if ( (status != -1) && (num_channels==6) ) {
if (config->lookup_int (config, "five_lfe_channel", 0)) {
- self->capabilities |= AO_CAP_MODE_5_1CHANNEL;
+ this->capabilities |= AO_CAP_MODE_5_1CHANNEL;
printf ("5.1-channel ");
} else
printf ("(5.1-channel not enabled in .xinerc) " );
@@ -526,7 +543,7 @@ ao_driver_t *init_audio_out_plugin (config_values_t *config) {
ioctl(audio_fd,SNDCTL_DSP_GETFMTS,&caps);
if (caps & AFMT_AC3) {
if (config->lookup_int (config, "ac3_pass_through", 0)) {
- self->capabilities |= AO_CAP_MODE_AC3;
+ this->capabilities |= AO_CAP_MODE_AC3;
printf ("ac3-pass-through ");
} else
printf ("(ac3-pass-through not enabled in .xinerc)");
@@ -536,21 +553,23 @@ ao_driver_t *init_audio_out_plugin (config_values_t *config) {
close (audio_fd);
- self->output_sample_rate = 0;
- self->audio_fd = -1;
-
- self->ao_driver.get_capabilities = ao_oss_get_capabilities;
- self->ao_driver.get_property = ao_oss_get_property;
- self->ao_driver.set_property = ao_oss_set_property;
- self->ao_driver.open = ao_oss_open;
- self->ao_driver.num_channels = ao_oss_num_channels;
- self->ao_driver.bytes_per_frame = ao_oss_bytes_per_frame;
- self->ao_driver.delay = ao_oss_delay;
- self->ao_driver.write = ao_oss_write;
- self->ao_driver.close = ao_oss_close;
- self->ao_driver.exit = ao_oss_exit;
-
- return &self->ao_driver;
+ this->output_sample_rate = 0;
+ this->audio_fd = -1;
+
+ this->static_delay = config->lookup_int (config, "oss_static_delay", 1000);
+
+ this->ao_driver.get_capabilities = ao_oss_get_capabilities;
+ this->ao_driver.get_property = ao_oss_get_property;
+ this->ao_driver.set_property = ao_oss_set_property;
+ this->ao_driver.open = ao_oss_open;
+ this->ao_driver.num_channels = ao_oss_num_channels;
+ this->ao_driver.bytes_per_frame = ao_oss_bytes_per_frame;
+ this->ao_driver.delay = ao_oss_delay;
+ this->ao_driver.write = ao_oss_write;
+ this->ao_driver.close = ao_oss_close;
+ this->ao_driver.exit = ao_oss_exit;
+
+ return &this->ao_driver;
}
static ao_info_t ao_info_oss = {
generated by cgit v1.2.3 (git 2.25.1) at 2025-04-30 03:25:40 +0000