/*****************************************************************************
- * oss.c : OSS /dev/dsp module for vlc
+ * oss.c: Open Sound System audio output plugin for VLC
*****************************************************************************
- * Copyright (C) 2000-2002 the VideoLAN team
- * $Id$
+ * Copyright (C) 2000-2002 VLC authors and VideoLAN
+ * Copyright (C) 2007-2012 Rémi Denis-Courmont
*
* Authors: Michel Kaempf <maxx@via.ecp.fr>
* Sam Hocevar <sam@zoy.org>
* Christophe Massiot <massiot@via.ecp.fr>
*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation; either version 2.1 of the License, or
* (at your option) any later version.
*
* 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.
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Lesser 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., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
- *****************************************************************************/
-
-/*****************************************************************************
- * Preamble
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
*****************************************************************************/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
-#include <fcntl.h> /* open(), O_WRONLY */
-#include <sys/ioctl.h> /* ioctl() */
-#include <unistd.h> /* write(), close() */
+#include <stdlib.h>
+#include <math.h>
+#include <sys/types.h>
+#include <fcntl.h>
+#include <sys/ioctl.h>
+#ifdef HAVE_SOUNDCARD_H
+# include <soundcard.h>
+#else
+# include <sys/soundcard.h>
+#endif
+
+#ifndef SNDCTL_DSP_HALT
+# define SNDCTL_DSP_HALT SNDCTL_DSP_RESET
+#endif
#include <vlc_common.h>
#include <vlc_plugin.h>
#include <vlc_fs.h>
-
+#include <vlc_cpu.h>
#include <vlc_aout.h>
-/* SNDCTL_DSP_RESET, SNDCTL_DSP_SETFMT, SNDCTL_DSP_STEREO, SNDCTL_DSP_SPEED,
- * SNDCTL_DSP_GETOSPACE */
-#ifdef HAVE_SOUNDCARD_H
-# include <soundcard.h>
-#elif defined( HAVE_SYS_SOUNDCARD_H )
-# include <sys/soundcard.h>
-#endif
-
-/* Patches for ignorant OSS versions */
-#ifndef AFMT_AC3
-# define AFMT_AC3 0x00000400 /* Dolby Digital AC3 */
-#endif
-
-#ifndef AFMT_S16_NE
-# ifdef WORDS_BIGENDIAN
-# define AFMT_S16_NE AFMT_S16_BE
-# else
-# define AFMT_S16_NE AFMT_S16_LE
-# endif
-#endif
+#define A52_FRAME_NB 1536
-/*****************************************************************************
- * aout_sys_t: OSS audio output method descriptor
- *****************************************************************************
- * This structure is part of the audio output thread descriptor.
- * It describes the DSP specific properties of an audio device.
- *****************************************************************************/
struct aout_sys_t
{
- int i_fd;
- int b_workaround_buggy_driver;
- int i_fragstotal;
- mtime_t max_buffer_duration;
-};
+ int fd;
+ audio_sample_format_t format;
+ bool starting;
-/* This must be a power of 2. */
-#define FRAME_SIZE 1024
-#define FRAME_COUNT 32
-
-/*****************************************************************************
- * Local prototypes
- *****************************************************************************/
-static int Open ( vlc_object_t * );
-static void Close ( vlc_object_t * );
-
-static void Play ( aout_instance_t * );
-static void* OSSThread ( vlc_object_t * );
+ bool mute;
+ uint8_t level;
+ char *device;
+};
-static mtime_t BufferDuration( aout_instance_t * p_aout );
+static int Open (vlc_object_t *);
+static void Close (vlc_object_t *);
-/*****************************************************************************
- * Module descriptor
- *****************************************************************************/
-#define BUGGY_TEXT N_("Try to work around buggy OSS drivers")
-#define BUGGY_LONGTEXT N_( \
- "Some buggy OSS drivers just don't like when their internal buffers " \
- "are completely filled (the sound gets heavily hashed). If you have one " \
- "of these drivers, then you need to enable this option." )
+#define AUDIO_DEV_TEXT N_("Audio output device")
+#define AUDIO_DEV_LONGTEXT N_("OSS device node path.")
vlc_module_begin ()
set_shortname( "OSS" )
- set_description( N_("UNIX OSS audio output") )
-
+ set_description (N_("Open Sound System audio output"))
set_category( CAT_AUDIO )
set_subcategory( SUBCAT_AUDIO_AOUT )
- add_file( "oss-audio-device", "/dev/dsp", aout_FindAndRestart,
- N_("OSS DSP device"), NULL, false )
- add_deprecated_alias( "dspdev" ) /* deprecated since 0.9.3 */
- add_bool( "oss-buggy", false, NULL, BUGGY_TEXT, BUGGY_LONGTEXT, true )
-
+ add_string ("oss-audio-device", "",
+ AUDIO_DEV_TEXT, AUDIO_DEV_LONGTEXT, false)
set_capability( "audio output", 100 )
- add_shortcut( "oss" )
- set_callbacks( Open, Close )
+ set_callbacks (Open, Close)
vlc_module_end ()
-/*****************************************************************************
- * Probe: probe the audio device for available formats and channels
- *****************************************************************************/
-static void Probe( aout_instance_t * p_aout )
-{
- struct aout_sys_t * p_sys = p_aout->output.p_sys;
- vlc_value_t val, text;
- int i_format, i_nb_channels;
-
- var_Create( p_aout, "audio-device", VLC_VAR_INTEGER | VLC_VAR_HASCHOICE );
- text.psz_string = _("Audio Device");
- var_Change( p_aout, "audio-device", VLC_VAR_SETTEXT, &text, NULL );
-
- /* Test for multi-channel. */
-#ifdef SNDCTL_DSP_GETCHANNELMASK
- if ( aout_FormatNbChannels( &p_aout->output.output ) > 2 )
- {
- /* Check that the device supports this. */
-
- int i_chanmask;
-
- /* Reset all. */
- i_format = AFMT_S16_NE;
- if( ioctl( p_sys->i_fd, SNDCTL_DSP_RESET, NULL ) < 0 ||
- ioctl( p_sys->i_fd, SNDCTL_DSP_SETFMT, &i_format ) < 0 )
- {
- msg_Err( p_aout, "cannot reset OSS audio device" );
- var_Destroy( p_aout, "audio-device" );
- return;
- }
-
- if ( ioctl( p_sys->i_fd, SNDCTL_DSP_GETCHANNELMASK,
- &i_chanmask ) == 0 )
- {
- if ( !(i_chanmask & DSP_BIND_FRONT) )
- {
- msg_Err( p_aout, "no front channels! (%x)",
- i_chanmask );
- return;
- }
+static int TimeGet (audio_output_t *, mtime_t *);
+static void Play (audio_output_t *, block_t *);
+static void Pause (audio_output_t *, bool, mtime_t);
+static void Flush (audio_output_t *, bool);
+static int VolumeSync (audio_output_t *);
- if ( (i_chanmask & (DSP_BIND_SURR | DSP_BIND_CENTER_LFE))
- && (p_aout->output.output.i_physical_channels ==
- (AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER
- | AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT
- | AOUT_CHAN_LFE)) )
- {
- val.i_int = AOUT_VAR_5_1;
- text.psz_string = (char*) "5.1";
- var_Change( p_aout, "audio-device",
- VLC_VAR_ADDCHOICE, &val, &text );
- }
+static int Start (audio_output_t *aout, audio_sample_format_t *restrict fmt)
+{
+ aout_sys_t* sys = aout->sys;
- if ( (i_chanmask & DSP_BIND_SURR)
- && (p_aout->output.output.i_physical_channels &
- (AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT
- | AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT)) )
- {
- val.i_int = AOUT_VAR_2F2R;
- text.psz_string = _("2 Front 2 Rear");
- var_Change( p_aout, "audio-device",
- VLC_VAR_ADDCHOICE, &val, &text );
- }
- }
- }
-#endif
+ /* Open the device */
+ const char *device = sys->device;
+ if (device == NULL)
+ device = getenv ("OSS_AUDIODEV");
+ if (device == NULL)
+ device = "/dev/dsp";
- /* Reset all. */
- i_format = AFMT_S16_NE;
- if( ioctl( p_sys->i_fd, SNDCTL_DSP_RESET, NULL ) < 0 ||
- ioctl( p_sys->i_fd, SNDCTL_DSP_SETFMT, &i_format ) < 0 )
+ int fd = vlc_open (device, O_WRONLY);
+ if (fd == -1)
{
- msg_Err( p_aout, "cannot reset OSS audio device" );
- var_Destroy( p_aout, "audio-device" );
- return;
+ msg_Err (aout, "cannot open OSS device %s: %m", device);
+ return VLC_EGENERIC;
}
+ sys->fd = fd;
+ msg_Dbg (aout, "using OSS device: %s", device);
- /* Test for stereo. */
- i_nb_channels = 2;
- if( ioctl( p_sys->i_fd, SNDCTL_DSP_CHANNELS, &i_nb_channels ) >= 0
- && i_nb_channels == 2 )
- {
- val.i_int = AOUT_VAR_STEREO;
- text.psz_string = _("Stereo");
- var_Change( p_aout, "audio-device", VLC_VAR_ADDCHOICE, &val, &text );
- }
+ /* Select audio format */
+ int format;
+ bool spdif = false;
- /* Reset all. */
- i_format = AFMT_S16_NE;
- if( ioctl( p_sys->i_fd, SNDCTL_DSP_RESET, NULL ) < 0 ||
- ioctl( p_sys->i_fd, SNDCTL_DSP_SETFMT, &i_format ) < 0 )
+ switch (fmt->i_format)
{
- msg_Err( p_aout, "cannot reset OSS audio device" );
- var_Destroy( p_aout, "audio-device" );
- return;
- }
-
- /* Test for mono. */
- i_nb_channels = 1;
- if( ioctl( p_sys->i_fd, SNDCTL_DSP_CHANNELS, &i_nb_channels ) >= 0
- && i_nb_channels == 1 )
- {
- val.i_int = AOUT_VAR_MONO;
- text.psz_string = _("Mono");
- var_Change( p_aout, "audio-device", VLC_VAR_ADDCHOICE, &val, &text );
- if ( p_aout->output.output.i_physical_channels == AOUT_CHAN_CENTER )
- {
- var_Set( p_aout, "audio-device", val );
- }
+#ifdef AFMT_FLOAT
+ case VLC_CODEC_FL64:
+ case VLC_CODEC_FL32:
+ format = AFMT_FLOAT;
+ break;
+#endif
+ case VLC_CODEC_S32N:
+ format = AFMT_S32_NE;
+ break;
+ case VLC_CODEC_S16N:
+ format = AFMT_S16_NE;
+ break;
+ case VLC_CODEC_U8:
+ format = AFMT_U8;
+ break;
+ default:
+ if (AOUT_FMT_SPDIF(fmt))
+ spdif = var_InheritBool (aout, "spdif");
+ if (spdif)
+ format = AFMT_AC3;
+#ifdef AFMT_FLOAT
+ else if (HAVE_FPU)
+ format = AFMT_FLOAT;
+#endif
+ else
+ format = AFMT_S16_NE;
}
- if( ioctl( p_sys->i_fd, SNDCTL_DSP_RESET, NULL ) < 0 )
+ if (ioctl (fd, SNDCTL_DSP_SETFMT, &format) < 0)
{
- msg_Err( p_aout, "cannot reset OSS audio device" );
- var_Destroy( p_aout, "audio-device" );
- return;
+ msg_Err (aout, "cannot set audio format 0x%X: %m", format);
+ goto error;
}
- /* Test for spdif. */
- if ( AOUT_FMT_NON_LINEAR( &p_aout->output.output ) )
+ switch (format)
{
- i_format = AFMT_AC3;
-
- if( ioctl( p_sys->i_fd, SNDCTL_DSP_SETFMT, &i_format ) >= 0
- && i_format == AFMT_AC3 )
- {
- val.i_int = AOUT_VAR_SPDIF;
- text.psz_string = _("A/52 over S/PDIF");
- var_Change( p_aout, "audio-device",
- VLC_VAR_ADDCHOICE, &val, &text );
- if( var_InheritInteger( p_aout, "spdif" ) )
- var_Set( p_aout, "audio-device", val );
- }
- else if( var_InheritInteger( p_aout, "spdif" ) )
- {
- msg_Warn( p_aout, "S/PDIF not supported by card" );
- }
+ case AFMT_U8: fmt->i_format = VLC_CODEC_U8; break;
+ case AFMT_S16_NE: fmt->i_format = VLC_CODEC_S16N; break;
+ case AFMT_S32_NE: fmt->i_format = VLC_CODEC_S32N; break;
+#ifdef AFMT_FLOAT
+ case AFMT_FLOAT: fmt->i_format = VLC_CODEC_FL32; break;
+#endif
+ case AFMT_AC3:
+ if (spdif)
+ {
+ fmt->i_format = VLC_CODEC_SPDIFL;
+ break;
+ }
+ default:
+ msg_Err (aout, "unsupported audio format 0x%X", format);
+ goto error;
}
- var_AddCallback( p_aout, "audio-device", aout_ChannelsRestart,
- NULL );
-}
-
-/*****************************************************************************
- * Open: open the audio device (the digital sound processor)
- *****************************************************************************
- * This function opens the DSP as a usual non-blocking write-only file, and
- * modifies the p_aout->p_sys->i_fd with the file's descriptor.
- *****************************************************************************/
-static int Open( vlc_object_t *p_this )
-{
- aout_instance_t * p_aout = (aout_instance_t *)p_this;
- struct aout_sys_t * p_sys;
- char * psz_device;
- vlc_value_t val;
-
- /* Allocate structure */
- p_aout->output.p_sys = p_sys = malloc( sizeof( aout_sys_t ) );
- if( p_sys == NULL )
- return VLC_ENOMEM;
-
- /* Get device name */
- if( (psz_device = var_InheritString( p_aout, "oss-audio-device" )) == NULL )
+ /* Select channels count */
+ int channels = spdif ? 2 : aout_FormatNbChannels (fmt);
+ if (ioctl (fd, SNDCTL_DSP_CHANNELS, &channels) < 0)
{
- msg_Err( p_aout, "no audio device specified (maybe /dev/dsp?)" );
- free( p_sys );
- return VLC_EGENERIC;
+ msg_Err (aout, "cannot set %d channels: %m", channels);
+ goto error;
}
- /* Open the sound device in non-blocking mode, because ALSA's OSS
- * emulation and some broken OSS drivers would make a blocking call
- * wait forever until the device is available. Since this breaks the
- * OSS spec, we immediately put it back to blocking mode if the
- * operation was successful. */
- p_sys->i_fd = utf8_open( psz_device, O_WRONLY | O_NDELAY );
- if( p_sys->i_fd < 0 )
+ switch (channels)
{
- msg_Err( p_aout, "cannot open audio device (%s)", psz_device );
- free( psz_device );
- free( p_sys );
- return VLC_EGENERIC;
+ case 1: channels = AOUT_CHAN_CENTER; break;
+ case 2: channels = AOUT_CHANS_STEREO; break;
+ case 4: channels = AOUT_CHANS_4_0; break;
+ case 6: channels = AOUT_CHANS_5_1; break;
+ case 8: channels = AOUT_CHANS_7_1; break;
+ default:
+ msg_Err (aout, "unsupported channels count %d", channels);
+ goto error;
}
- /* if the opening was ok, put the device back in blocking mode */
- fcntl( p_sys->i_fd, F_SETFL,
- fcntl( p_sys->i_fd, F_GETFL ) &~ FNDELAY );
-
- free( psz_device );
-
- p_aout->output.pf_play = Play;
-
- if ( var_Type( p_aout, "audio-device" ) == 0 )
+ /* Select sample rate */
+ int rate = spdif ? 48000 : fmt->i_rate;
+ if (ioctl (fd, SNDCTL_DSP_SPEED, &rate) < 0)
{
- Probe( p_aout );
+ msg_Err (aout, "cannot set %d Hz sample rate: %m", rate);
+ goto error;
}
- if ( var_Get( p_aout, "audio-device", &val ) < 0 )
- {
- /* Probe() has failed. */
- close( p_sys->i_fd );
- free( p_sys );
- return VLC_EGENERIC;
- }
+ /* Setup audio_output_t */
+ aout->time_get = TimeGet;
+ aout->play = Play;
+ aout->pause = Pause;
+ aout->flush = Flush;
- if ( val.i_int == AOUT_VAR_SPDIF )
- {
- p_aout->output.output.i_format = VLC_CODEC_SPDIFL;
- }
- else if ( val.i_int == AOUT_VAR_5_1 )
- {
- p_aout->output.output.i_format = VLC_CODEC_S16N;
- p_aout->output.output.i_physical_channels
- = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER
- | AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT
- | AOUT_CHAN_LFE;
- }
- else if ( val.i_int == AOUT_VAR_2F2R )
- {
- p_aout->output.output.i_format = VLC_CODEC_S16N;
- p_aout->output.output.i_physical_channels
- = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT
- | AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT;
- }
- else if ( val.i_int == AOUT_VAR_STEREO )
+ if (spdif)
{
- p_aout->output.output.i_format = VLC_CODEC_S16N;
- p_aout->output.output.i_physical_channels
- = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT;
- }
- else if ( val.i_int == AOUT_VAR_MONO )
- {
- p_aout->output.output.i_format = VLC_CODEC_S16N;
- p_aout->output.output.i_physical_channels = AOUT_CHAN_CENTER;
+ fmt->i_bytes_per_frame = AOUT_SPDIF_SIZE;
+ fmt->i_frame_length = A52_FRAME_NB;
}
else
{
- /* This should not happen ! */
- msg_Err( p_aout, "internal: can't find audio-device (%i)", val.i_int );
- close( p_sys->i_fd );
- free( p_sys );
- return VLC_EGENERIC;
+ fmt->i_rate = rate;
+ fmt->i_original_channels =
+ fmt->i_physical_channels = channels;
}
- var_SetBool( p_aout, "intf-change", true );
+ VolumeSync (aout);
+ sys->starting = true;
+ sys->format = *fmt;
+ return VLC_SUCCESS;
+error:
+ close (fd);
+ return VLC_EGENERIC;
+}
- /* Reset the DSP device */
- if( ioctl( p_sys->i_fd, SNDCTL_DSP_RESET, NULL ) < 0 )
- {
- msg_Err( p_aout, "cannot reset OSS audio device" );
- close( p_sys->i_fd );
- free( p_sys );
- return VLC_EGENERIC;
- }
+static int TimeGet (audio_output_t *aout, mtime_t *restrict pts)
+{
+ aout_sys_t *sys = aout->sys;
+ int delay;
- /* Set the output format */
- if ( AOUT_FMT_NON_LINEAR( &p_aout->output.output ) )
+ if (ioctl (sys->fd, SNDCTL_DSP_GETODELAY, &delay) < 0)
{
- int i_format = AFMT_AC3;
-
- if( ioctl( p_sys->i_fd, SNDCTL_DSP_SETFMT, &i_format ) < 0
- || i_format != AFMT_AC3 )
- {
- msg_Err( p_aout, "cannot reset OSS audio device" );
- close( p_sys->i_fd );
- free( p_sys );
- return VLC_EGENERIC;
- }
+ msg_Warn (aout, "cannot get delay: %m");
+ return -1;
+ }
- p_aout->output.output.i_format = VLC_CODEC_SPDIFL;
- p_aout->output.i_nb_samples = A52_FRAME_NB;
- p_aout->output.output.i_bytes_per_frame = AOUT_SPDIF_SIZE;
- p_aout->output.output.i_frame_length = A52_FRAME_NB;
+ *pts = (delay * CLOCK_FREQ * sys->format.i_frame_length)
+ / (sys->format.i_rate * sys->format.i_bytes_per_frame);
+ return 0;
+}
- aout_VolumeNoneInit( p_aout );
- }
+/**
+ * Queues one audio buffer to the hardware.
+ */
+static void Play (audio_output_t *aout, block_t *block)
+{
+ aout_sys_t *sys = aout->sys;
+ int fd = sys->fd;
- if ( !AOUT_FMT_NON_LINEAR( &p_aout->output.output ) )
+ while (block->i_buffer > 0)
{
- unsigned int i_format = AFMT_S16_NE;
- unsigned int i_frame_size, i_fragments;
- unsigned int i_rate;
- unsigned int i_nb_channels;
- audio_buf_info audio_buf;
-
- if( ioctl( p_sys->i_fd, SNDCTL_DSP_SETFMT, &i_format ) < 0 )
+ ssize_t bytes = write (fd, block->p_buffer, block->i_buffer);
+ if (bytes >= 0)
{
- msg_Err( p_aout, "cannot set audio output format" );
- close( p_sys->i_fd );
- free( p_sys );
- return VLC_EGENERIC;
+ block->p_buffer += bytes;
+ block->i_buffer -= bytes;
}
+ else
+ msg_Err (aout, "cannot write samples: %m");
+ }
+ block_Release (block);
- switch ( i_format )
- {
- case AFMT_U8:
- p_aout->output.output.i_format = VLC_CODEC_U8;
- break;
- case AFMT_S8:
- p_aout->output.output.i_format = VLC_CODEC_S8;
- break;
- case AFMT_U16_LE:
- p_aout->output.output.i_format = VLC_CODEC_U16L;
- break;
- case AFMT_S16_LE:
- p_aout->output.output.i_format = VLC_CODEC_S16L;
- break;
- case AFMT_U16_BE:
- p_aout->output.output.i_format = VLC_CODEC_U16B;
- break;
- case AFMT_S16_BE:
- p_aout->output.output.i_format = VLC_CODEC_S16B;
- break;
- default:
- msg_Err( p_aout, "OSS fell back to an unknown format (%d)",
- i_format );
- close( p_sys->i_fd );
- free( p_sys );
- return VLC_EGENERIC;
- }
+ /* Dumb OSS cannot send any kind of events for this... */
+ VolumeSync (aout);
+}
- i_nb_channels = aout_FormatNbChannels( &p_aout->output.output );
+/**
+ * Pauses/resumes the audio playback.
+ */
+static void Pause (audio_output_t *aout, bool pause, mtime_t date)
+{
+ aout_sys_t *sys = aout->sys;
+ int fd = sys->fd;
- /* Set the number of channels */
- if( ioctl( p_sys->i_fd, SNDCTL_DSP_CHANNELS, &i_nb_channels ) < 0 ||
- i_nb_channels != aout_FormatNbChannels( &p_aout->output.output ) )
- {
- msg_Err( p_aout, "cannot set number of audio channels (%s)",
- aout_FormatPrintChannels( &p_aout->output.output) );
- close( p_sys->i_fd );
- free( p_sys );
- return VLC_EGENERIC;
- }
+ (void) date;
+ ioctl (fd, pause ? SNDCTL_DSP_SILENCE : SNDCTL_DSP_SKIP, NULL);
+}
- /* Set the output rate */
- i_rate = p_aout->output.output.i_rate;
- if( ioctl( p_sys->i_fd, SNDCTL_DSP_SPEED, &i_rate ) < 0 )
- {
- msg_Err( p_aout, "cannot set audio output rate (%i)",
- p_aout->output.output.i_rate );
- close( p_sys->i_fd );
- free( p_sys );
- return VLC_EGENERIC;
- }
+/**
+ * Flushes/drains the audio playback buffer.
+ */
+static void Flush (audio_output_t *aout, bool wait)
+{
+ aout_sys_t *sys = aout->sys;
+ int fd = sys->fd;
- if( i_rate != p_aout->output.output.i_rate )
- {
- p_aout->output.output.i_rate = i_rate;
- }
+ if (wait)
+ return; /* drain is implicit with OSS */
+ ioctl (fd, SNDCTL_DSP_HALT_OUTPUT, NULL);
+}
- /* Set the fragment size */
- aout_FormatPrepare( &p_aout->output.output );
+static int VolumeSync (audio_output_t *aout)
+{
+ aout_sys_t *sys = aout->sys;
+ int fd = sys->fd;
+
+ int level;
+ if (ioctl (fd, SNDCTL_DSP_GETPLAYVOL, &level) < 0)
+ return -1;
+
+ sys->mute = !level;
+ if (level) /* try to keep last volume before mute */
+ sys->level = level;
+ aout_MuteReport (aout, !level);
+ aout_VolumeReport (aout, (float)(level & 0xFF) / 100.f);
+ return 0;
+}
- /* i_fragment = xxxxyyyy where: xxxx is fragtotal
- * 1 << yyyy is fragsize */
- i_frame_size = ((uint64_t)p_aout->output.output.i_bytes_per_frame * p_aout->output.output.i_rate * 65536) / (48000 * 2 * 2) / FRAME_COUNT;
- i_fragments = 4;
- while( i_fragments < 12 && (1U << i_fragments) < i_frame_size )
- {
- ++i_fragments;
- }
- i_fragments |= FRAME_COUNT << 16;
- if( ioctl( p_sys->i_fd, SNDCTL_DSP_SETFRAGMENT, &i_fragments ) < 0 )
- {
- msg_Warn( p_aout, "cannot set fragment size (%.8x)", i_fragments );
- }
+/**
+ * Releases the audio output device.
+ */
+static void Stop (audio_output_t *aout)
+{
+ aout_sys_t *sys = aout->sys;
+ int fd = sys->fd;
- if( ioctl( p_sys->i_fd, SNDCTL_DSP_GETOSPACE, &audio_buf ) < 0 )
- {
- msg_Err( p_aout, "cannot get fragment size" );
- close( p_sys->i_fd );
- free( p_sys );
- return VLC_EGENERIC;
- }
- else
- {
- /* Number of fragments actually allocated */
- p_aout->output.p_sys->i_fragstotal = audio_buf.fragstotal;
-
- /* Maximum duration the soundcard's buffer can hold */
- p_aout->output.p_sys->max_buffer_duration =
- (mtime_t)audio_buf.fragstotal * audio_buf.fragsize * 1000000
- / p_aout->output.output.i_bytes_per_frame
- / p_aout->output.output.i_rate
- * p_aout->output.output.i_frame_length;
-
- p_aout->output.i_nb_samples = audio_buf.fragsize /
- p_aout->output.output.i_bytes_per_frame;
- }
+ ioctl (fd, SNDCTL_DSP_HALT, NULL);
+ close (fd);
+ sys->fd = -1;
+}
- aout_VolumeSoftInit( p_aout );
+static int VolumeSet (audio_output_t *aout, float vol)
+{
+ aout_sys_t *sys = aout->sys;
+ int fd = sys->fd;
+ if (fd == -1)
+ return -1;
+
+ int level = lroundf (vol * 100.f);
+ if (level > 0xFF)
+ level = 0xFFFF;
+ else
+ level |= level << 8;
+ if (!sys->mute && ioctl (fd, SNDCTL_DSP_SETPLAYVOL, &level) < 0)
+ {
+ msg_Err (aout, "cannot set volume: %m");
+ return -1;
}
- p_aout->output.p_sys->b_workaround_buggy_driver =
- var_InheritInteger( p_aout, "oss-buggy" );
+ sys->level = level;
+ aout_VolumeReport (aout, (float)(level & 0xFF) / 100.f);
+ return 0;
+}
- /* Create OSS thread and wait for its readiness. */
- if( vlc_thread_create( p_aout, "aout", OSSThread,
- VLC_THREAD_PRIORITY_OUTPUT ) )
+static int MuteSet (audio_output_t *aout, bool mute)
+{
+ aout_sys_t *sys = aout->sys;
+ int fd = sys->fd;
+ if (fd == -1)
+ return -1;
+
+ int level = mute ? 0 : (sys->level | (sys->level << 8));
+ if (ioctl (fd, SNDCTL_DSP_SETPLAYVOL, &level) < 0)
{
- msg_Err( p_aout, "cannot create OSS thread (%m)" );
- close( p_sys->i_fd );
- free( p_sys );
- return VLC_ENOMEM;
+ msg_Err (aout, "cannot mute: %m");
+ return -1;
}
- return VLC_SUCCESS;
+ sys->mute = mute;
+ aout_MuteReport (aout, mute);
+ return 0;
}
-/*****************************************************************************
- * Play: nothing to do
- *****************************************************************************/
-static void Play( aout_instance_t *p_aout )
+static int DevicesEnum (audio_output_t *aout)
{
- VLC_UNUSED(p_aout);
-}
+ int fd = vlc_open ("/dev/dsp", O_WRONLY);
+ if (fd == -1)
+ return -1;
-/*****************************************************************************
- * Close: close the DSP audio device
- *****************************************************************************/
-static void Close( vlc_object_t * p_this )
-{
- aout_instance_t *p_aout = (aout_instance_t *)p_this;
- struct aout_sys_t * p_sys = p_aout->output.p_sys;
+ oss_sysinfo si;
+ int n = -1;
- vlc_object_kill( p_aout );
- vlc_thread_join( p_aout );
- p_aout->b_die = false;
+ if (ioctl (fd, SNDCTL_SYSINFO, &si) < 0)
+ {
+ msg_Err (aout, "cannot get system infos: %m");
+ goto out;
+ }
- ioctl( p_sys->i_fd, SNDCTL_DSP_RESET, NULL );
- close( p_sys->i_fd );
+ msg_Dbg (aout, "using %s version %s (0x%06X) under %s", si.product,
+ si.version, si.versionnum, si.license);
- free( p_sys );
-}
+ for (int i = 0; i < si.numaudios; i++)
+ {
+ oss_audioinfo ai = { .dev = i };
-/*****************************************************************************
- * BufferDuration: buffer status query
- *****************************************************************************
- * This function returns the duration in microseconds of the current buffer.
- *****************************************************************************/
-static mtime_t BufferDuration( aout_instance_t * p_aout )
-{
- struct aout_sys_t * p_sys = p_aout->output.p_sys;
- audio_buf_info audio_buf;
- int i_bytes;
-
- /* Fill the audio_buf_info structure:
- * - fragstotal: total number of fragments allocated
- * - fragsize: size of a fragment in bytes
- * - bytes: available space in bytes (includes partially used fragments)
- * Note! 'bytes' could be more than fragments*fragsize */
- ioctl( p_sys->i_fd, SNDCTL_DSP_GETOSPACE, &audio_buf );
-
- /* calculate number of available fragments (not partially used ones) */
- i_bytes = (audio_buf.fragstotal * audio_buf.fragsize) - audio_buf.bytes;
-
- /* Return the fragment duration */
- return (mtime_t)i_bytes * 1000000
- / p_aout->output.output.i_bytes_per_frame
- / p_aout->output.output.i_rate
- * p_aout->output.output.i_frame_length;
+ if (ioctl (fd, SNDCTL_AUDIOINFO, &ai) < 0)
+ {
+ msg_Warn (aout, "cannot get device %d infos: %m", i);
+ continue;
+ }
+ if (ai.caps & (PCM_CAP_HIDDEN|PCM_CAP_MODEM))
+ continue;
+ if (!(ai.caps & PCM_CAP_OUTPUT))
+ continue;
+ if (!ai.enabled)
+ continue;
+
+ aout_HotplugReport (aout, ai.devnode, ai.name);
+ n++;
+ }
+out:
+ close (fd);
+ return n;
}
-/*****************************************************************************
- * OSSThread: asynchronous thread used to DMA the data to the device
- *****************************************************************************/
-static void* OSSThread( vlc_object_t *p_this )
+static int DeviceSelect (audio_output_t *aout, const char *id)
{
- aout_instance_t * p_aout = (aout_instance_t*)p_this;
- struct aout_sys_t * p_sys = p_aout->output.p_sys;
- mtime_t next_date = 0;
- int canc = vlc_savecancel ();
+ aout_sys_t *sys = aout->sys;
+ char *path = NULL;
- while ( vlc_object_alive (p_aout) )
+ if (id != NULL)
{
- aout_buffer_t * p_buffer = NULL;
- int i_tmp, i_size;
- uint8_t * p_bytes;
-
- if ( p_aout->output.output.i_format != VLC_CODEC_SPDIFL )
- {
- mtime_t buffered = BufferDuration( p_aout );
+ path = strdup (id);
+ if (unlikely(path == NULL))
+ return -1;
+ }
- if( p_aout->output.p_sys->b_workaround_buggy_driver )
- {
-#define i_fragstotal p_aout->output.p_sys->i_fragstotal
- /* Wait a bit - we don't want our buffer to be full */
- if( buffered > (p_aout->output.p_sys->max_buffer_duration
- / i_fragstotal * (i_fragstotal - 1)) )
- {
- msleep((p_aout->output.p_sys->max_buffer_duration
- / i_fragstotal ));
- buffered = BufferDuration( p_aout );
- }
-#undef i_fragstotal
- }
+ free (sys->device);
+ sys->device = path;
+ aout_DeviceReport (aout, path);
+ aout_RestartRequest (aout, AOUT_RESTART_OUTPUT);
+ return 0;
+}
- /* Next buffer will be played at mdate() + buffered */
- p_buffer = aout_OutputNextBuffer( p_aout, mdate() + buffered,
- false );
+static int Open (vlc_object_t *obj)
+{
+ audio_output_t *aout = (audio_output_t *)obj;
- if( p_buffer == NULL &&
- buffered > ( p_aout->output.p_sys->max_buffer_duration
- / p_aout->output.p_sys->i_fragstotal ) )
- {
- /* If we have at least a fragment full, then we can wait a
- * little and retry to get a new audio buffer instead of
- * playing a blank sample */
- msleep( ( p_aout->output.p_sys->max_buffer_duration
- / p_aout->output.p_sys->i_fragstotal / 2 ) );
- continue;
- }
- }
- else
- {
- /* emu10k1 driver does not report Buffer Duration correctly in
- * passthrough mode so we have to cheat */
- if( !next_date )
- {
- next_date = mdate();
- }
- else
- {
- mtime_t delay = next_date - mdate();
- if( delay > AOUT_PTS_TOLERANCE )
- {
- msleep( delay / 2 );
- }
- }
+ aout_sys_t *sys = malloc (sizeof (*sys));
+ if(unlikely( sys == NULL ))
+ return VLC_ENOMEM;
- while( vlc_object_alive (p_aout) && ! ( p_buffer =
- aout_OutputNextBuffer( p_aout, next_date, true ) ) )
- {
- msleep( VLC_HARD_MIN_SLEEP );
- next_date = mdate();
- }
- }
+ sys->fd = -1;
- if ( p_buffer != NULL )
- {
- p_bytes = p_buffer->p_buffer;
- i_size = p_buffer->i_buffer;
- /* This is theoretical ... we'll see next iteration whether
- * we're drifting */
- next_date += p_buffer->i_length;
- }
- else
- {
- i_size = FRAME_SIZE / p_aout->output.output.i_frame_length
- * p_aout->output.output.i_bytes_per_frame;
- p_bytes = malloc( i_size );
- memset( p_bytes, 0, i_size );
- next_date = 0;
- }
+ sys->level = 100;
+ sys->mute = false;
+ sys->device = var_InheritString (aout, "oss-audio-device");
- i_tmp = write( p_sys->i_fd, p_bytes, i_size );
+ aout->sys = sys;
+ aout->start = Start;
+ aout->stop = Stop;
+ aout->volume_set = VolumeSet;
+ aout->mute_set = MuteSet;
+ aout->device_select = DeviceSelect;
- if( i_tmp < 0 )
- {
- msg_Err( p_aout, "write failed (%m)" );
- }
+ DevicesEnum (aout);
+ return VLC_SUCCESS;
+}
- if ( p_buffer != NULL )
- {
- aout_BufferFree( p_buffer );
- }
- else
- {
- free( p_bytes );
- }
- }
+static void Close (vlc_object_t *obj)
+{
+ audio_output_t *aout = (audio_output_t *)obj;
+ aout_sys_t *sys = aout->sys;
- vlc_restorecancel (canc);
- return NULL;
+ free (sys->device);
+ free (sys);
}
projects / vlc / blobdiff