diff options
Diffstat (limited to 'sys/oss/gstosssink.c')
| -rw-r--r-- | sys/oss/gstosssink.c | 565 |
1 files changed, 565 insertions, 0 deletions
diff --git a/sys/oss/gstosssink.c b/sys/oss/gstosssink.c new file mode 100644 index 0000000..a604d9c --- /dev/null +++ b/sys/oss/gstosssink.c @@ -0,0 +1,565 @@ +/* GStreamer + * Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu> + * 2000,2005 Wim Taymans <wim@fluendo.com> + * + * gstosssink.c: + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Library General Public + * License as published by the Free Software Foundation; either + * version 2 of the License, or (at your option) any later version. + * + * This library 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 + * Library General Public License for more details. + * + * You should have received a copy of the GNU Library General Public + * License along with this library; if not, write to the + * Free Software Foundation, Inc., 59 Temple Place - Suite 330, + * Boston, MA 02111-1307, USA. + */ + +/** + * SECTION:element-osssink + * + * This element lets you output sound using the Open Sound System (OSS). + * + * Note that you should almost always use generic audio conversion elements + * like audioconvert and audioresample in front of an audiosink to make sure + * your pipeline works under all circumstances (those conversion elements will + * act in passthrough-mode if no conversion is necessary). + * + * <refsect2> + * <title>Example pipelines</title> + * |[ + * gst-launch -v audiotestsrc ! audioconvert ! volume volume=0.1 ! osssink + * ]| will output a sine wave (continuous beep sound) to your sound card (with + * a very low volume as precaution). + * |[ + * gst-launch -v filesrc location=music.ogg ! decodebin ! audioconvert ! audioresample ! osssink + * ]| will play an Ogg/Vorbis audio file and output it using the Open Sound System. + * </refsect2> + */ + +#ifdef HAVE_CONFIG_H +#include "config.h" +#endif +#include <sys/ioctl.h> +#include <fcntl.h> +#include <errno.h> +#include <unistd.h> +#include <string.h> + +#ifdef HAVE_OSS_INCLUDE_IN_SYS +# include <sys/soundcard.h> +#else +# ifdef HAVE_OSS_INCLUDE_IN_ROOT +# include <soundcard.h> +# else +# ifdef HAVE_OSS_INCLUDE_IN_MACHINE +# include <machine/soundcard.h> +# else +# error "What to include?" +# endif /* HAVE_OSS_INCLUDE_IN_MACHINE */ +# endif /* HAVE_OSS_INCLUDE_IN_ROOT */ +#endif /* HAVE_OSS_INCLUDE_IN_SYS */ + +#include "common.h" +#include "gstosssink.h" + +#include <gst/gst-i18n-plugin.h> + +GST_DEBUG_CATEGORY_EXTERN (oss_debug); +#define GST_CAT_DEFAULT oss_debug + +static void gst_oss_sink_base_init (gpointer g_class); +static void gst_oss_sink_class_init (GstOssSinkClass * klass); +static void gst_oss_sink_init (GstOssSink * osssink); + +static void gst_oss_sink_dispose (GObject * object); +static void gst_oss_sink_finalise (GObject * object); + +static void gst_oss_sink_get_property (GObject * object, guint prop_id, + GValue * value, GParamSpec * pspec); +static void gst_oss_sink_set_property (GObject * object, guint prop_id, + const GValue * value, GParamSpec * pspec); + +static GstCaps *gst_oss_sink_getcaps (GstBaseSink * bsink); + +static gboolean gst_oss_sink_open (GstAudioSink * asink); +static gboolean gst_oss_sink_close (GstAudioSink * asink); +static gboolean gst_oss_sink_prepare (GstAudioSink * asink, + GstRingBufferSpec * spec); +static gboolean gst_oss_sink_unprepare (GstAudioSink * asink); +static guint gst_oss_sink_write (GstAudioSink * asink, gpointer data, + guint length); +static guint gst_oss_sink_delay (GstAudioSink * asink); +static void gst_oss_sink_reset (GstAudioSink * asink); + +/* OssSink signals and args */ +enum +{ + LAST_SIGNAL +}; + +#define DEFAULT_DEVICE "/dev/dsp" +enum +{ + PROP_0, + PROP_DEVICE, +}; + +static GstStaticPadTemplate osssink_sink_factory = + GST_STATIC_PAD_TEMPLATE ("sink", + GST_PAD_SINK, + GST_PAD_ALWAYS, + GST_STATIC_CAPS ("audio/x-raw-int, " + "endianness = (int) { " G_STRINGIFY (G_BYTE_ORDER) " }, " + "signed = (boolean) { TRUE, FALSE }, " + "width = (int) 16, " + "depth = (int) 16, " + "rate = (int) [ 1, MAX ], " "channels = (int) [ 1, 2 ]; " + "audio/x-raw-int, " + "signed = (boolean) { TRUE, FALSE }, " + "width = (int) 8, " + "depth = (int) 8, " + "rate = (int) [ 1, MAX ], " "channels = (int) [ 1, 2 ]") + ); + +static GstElementClass *parent_class = NULL; + +/* static guint gst_oss_sink_signals[LAST_SIGNAL] = { 0 }; */ + +GType +gst_oss_sink_get_type (void) +{ + static GType osssink_type = 0; + + if (!osssink_type) { + static const GTypeInfo osssink_info = { + sizeof (GstOssSinkClass), + gst_oss_sink_base_init, + NULL, + (GClassInitFunc) gst_oss_sink_class_init, + NULL, + NULL, + sizeof (GstOssSink), + 0, + (GInstanceInitFunc) gst_oss_sink_init, + }; + + osssink_type = + g_type_register_static (GST_TYPE_AUDIO_SINK, "GstOssSink", + &osssink_info, 0); + } + + return osssink_type; +} + +static void +gst_oss_sink_dispose (GObject * object) +{ + GstOssSink *osssink = GST_OSSSINK (object); + + if (osssink->probed_caps) { + gst_caps_unref (osssink->probed_caps); + osssink->probed_caps = NULL; + } + + G_OBJECT_CLASS (parent_class)->dispose (object); +} + +static void +gst_oss_sink_base_init (gpointer g_class) +{ + GstElementClass *element_class = GST_ELEMENT_CLASS (g_class); + + gst_element_class_set_details_simple (element_class, "Audio Sink (OSS)", + "Sink/Audio", + "Output to a sound card via OSS", + "Erik Walthinsen <omega@cse.ogi.edu>, " + "Wim Taymans <wim.taymans@chello.be>"); + + gst_element_class_add_static_pad_template (element_class, + &osssink_sink_factory); +} + +static void +gst_oss_sink_class_init (GstOssSinkClass * klass) +{ + GObjectClass *gobject_class; + GstBaseSinkClass *gstbasesink_class; + GstAudioSinkClass *gstaudiosink_class; + + gobject_class = (GObjectClass *) klass; + gstbasesink_class = (GstBaseSinkClass *) klass; + gstaudiosink_class = (GstAudioSinkClass *) klass; + + parent_class = g_type_class_peek_parent (klass); + + gobject_class->dispose = gst_oss_sink_dispose; + gobject_class->finalize = gst_oss_sink_finalise; + gobject_class->get_property = gst_oss_sink_get_property; + gobject_class->set_property = gst_oss_sink_set_property; + + g_object_class_install_property (gobject_class, PROP_DEVICE, + g_param_spec_string ("device", "Device", + "OSS device (usually /dev/dspN)", DEFAULT_DEVICE, + G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); + + gstbasesink_class->get_caps = GST_DEBUG_FUNCPTR (gst_oss_sink_getcaps); + + gstaudiosink_class->open = GST_DEBUG_FUNCPTR (gst_oss_sink_open); + gstaudiosink_class->close = GST_DEBUG_FUNCPTR (gst_oss_sink_close); + gstaudiosink_class->prepare = GST_DEBUG_FUNCPTR (gst_oss_sink_prepare); + gstaudiosink_class->unprepare = GST_DEBUG_FUNCPTR (gst_oss_sink_unprepare); + gstaudiosink_class->write = GST_DEBUG_FUNCPTR (gst_oss_sink_write); + gstaudiosink_class->delay = GST_DEBUG_FUNCPTR (gst_oss_sink_delay); + gstaudiosink_class->reset = GST_DEBUG_FUNCPTR (gst_oss_sink_reset); +} + +static void +gst_oss_sink_init (GstOssSink * osssink) +{ + const gchar *device; + + GST_DEBUG_OBJECT (osssink, "initializing osssink"); + + device = g_getenv ("AUDIODEV"); + if (device == NULL) + device = DEFAULT_DEVICE; + osssink->device = g_strdup (device); + osssink->fd = -1; +} + +static void +gst_oss_sink_finalise (GObject * object) +{ + GstOssSink *osssink = GST_OSSSINK (object); + + g_free (osssink->device); + + G_OBJECT_CLASS (parent_class)->finalize ((GObject *) (object)); +} + +static void +gst_oss_sink_set_property (GObject * object, guint prop_id, + const GValue * value, GParamSpec * pspec) +{ + GstOssSink *sink; + + sink = GST_OSSSINK (object); + + switch (prop_id) { + case PROP_DEVICE: + g_free (sink->device); + sink->device = g_value_dup_string (value); + if (sink->probed_caps) { + gst_caps_unref (sink->probed_caps); + sink->probed_caps = NULL; + } + break; + default: + G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); + break; + } +} + +static void +gst_oss_sink_get_property (GObject * object, guint prop_id, + GValue * value, GParamSpec * pspec) +{ + GstOssSink *sink; + + sink = GST_OSSSINK (object); + + switch (prop_id) { + case PROP_DEVICE: + g_value_set_string (value, sink->device); + break; + default: + G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); + break; + } +} + +static GstCaps * +gst_oss_sink_getcaps (GstBaseSink * bsink) +{ + GstOssSink *osssink; + GstCaps *caps; + + osssink = GST_OSSSINK (bsink); + + if (osssink->fd == -1) { + caps = gst_caps_copy (gst_pad_get_pad_template_caps (GST_BASE_SINK_PAD + (bsink))); + } else if (osssink->probed_caps) { + caps = gst_caps_copy (osssink->probed_caps); + } else { + caps = gst_oss_helper_probe_caps (osssink->fd); + if (caps && !gst_caps_is_empty (caps)) { + osssink->probed_caps = gst_caps_copy (caps); + } + } + + return caps; +} + +static gint +ilog2 (gint x) +{ + /* well... hacker's delight explains... */ + x = x | (x >> 1); + x = x | (x >> 2); + x = x | (x >> 4); + x = x | (x >> 8); + x = x | (x >> 16); + x = x - ((x >> 1) & 0x55555555); + x = (x & 0x33333333) + ((x >> 2) & 0x33333333); + x = (x + (x >> 4)) & 0x0f0f0f0f; + x = x + (x >> 8); + x = x + (x >> 16); + return (x & 0x0000003f) - 1; +} + +static gint +gst_oss_sink_get_format (GstBufferFormat fmt) +{ + gint result; + + switch (fmt) { + case GST_MU_LAW: + result = AFMT_MU_LAW; + break; + case GST_A_LAW: + result = AFMT_A_LAW; + break; + case GST_IMA_ADPCM: + result = AFMT_IMA_ADPCM; + break; + case GST_U8: + result = AFMT_U8; + break; + case GST_S16_LE: + result = AFMT_S16_LE; + break; + case GST_S16_BE: + result = AFMT_S16_BE; + break; + case GST_S8: + result = AFMT_S8; + break; + case GST_U16_LE: + result = AFMT_U16_LE; + break; + case GST_U16_BE: + result = AFMT_U16_BE; + break; + case GST_MPEG: + result = AFMT_MPEG; + break; + default: + result = 0; + break; + } + return result; +} + +static gboolean +gst_oss_sink_open (GstAudioSink * asink) +{ + GstOssSink *oss; + int mode; + + oss = GST_OSSSINK (asink); + + mode = O_WRONLY; + mode |= O_NONBLOCK; + + oss->fd = open (oss->device, mode, 0); + if (oss->fd == -1) { + switch (errno) { + case EBUSY: + goto busy; + case EACCES: + goto no_permission; + default: + goto open_failed; + } + } + + return TRUE; + + /* ERRORS */ +busy: + { + GST_ELEMENT_ERROR (oss, RESOURCE, BUSY, + (_("Could not open audio device for playback. " + "Device is being used by another application.")), (NULL)); + return FALSE; + } +no_permission: + { + GST_ELEMENT_ERROR (oss, RESOURCE, OPEN_WRITE, + (_("Could not open audio device for playback. " + "You don't have permission to open the device.")), + GST_ERROR_SYSTEM); + return FALSE; + } +open_failed: + { + GST_ELEMENT_ERROR (oss, RESOURCE, OPEN_WRITE, + (_("Could not open audio device for playback.")), GST_ERROR_SYSTEM); + return FALSE; + } +} + +static gboolean +gst_oss_sink_close (GstAudioSink * asink) +{ + close (GST_OSSSINK (asink)->fd); + GST_OSSSINK (asink)->fd = -1; + return TRUE; +} + +static gboolean +gst_oss_sink_prepare (GstAudioSink * asink, GstRingBufferSpec * spec) +{ + GstOssSink *oss; + struct audio_buf_info info; + int mode; + int tmp; + + oss = GST_OSSSINK (asink); + + /* we opened non-blocking so that we can detect if the device is available + * without hanging forever. We now want to remove the non-blocking flag. */ + mode = fcntl (oss->fd, F_GETFL); + mode &= ~O_NONBLOCK; + if (fcntl (oss->fd, F_SETFL, mode) == -1) { + /* some drivers do no support unsetting the non-blocking flag, try to + * close/open the device then. This is racy but we error out properly. */ + gst_oss_sink_close (asink); + if ((oss->fd = open (oss->device, O_WRONLY, 0)) == -1) + goto non_block; + } + + tmp = gst_oss_sink_get_format (spec->format); + if (tmp == 0) + goto wrong_format; + + if (spec->width != 16 && spec->width != 8) + goto dodgy_width; + + SET_PARAM (oss, SNDCTL_DSP_SETFMT, tmp, "SETFMT"); + if (spec->channels == 2) + SET_PARAM (oss, SNDCTL_DSP_STEREO, 1, "STEREO"); + SET_PARAM (oss, SNDCTL_DSP_CHANNELS, spec->channels, "CHANNELS"); + SET_PARAM (oss, SNDCTL_DSP_SPEED, spec->rate, "SPEED"); + + tmp = ilog2 (spec->segsize); + tmp = ((spec->segtotal & 0x7fff) << 16) | tmp; + GST_DEBUG_OBJECT (oss, "set segsize: %d, segtotal: %d, value: %08x", + spec->segsize, spec->segtotal, tmp); + + SET_PARAM (oss, SNDCTL_DSP_SETFRAGMENT, tmp, "SETFRAGMENT"); + GET_PARAM (oss, SNDCTL_DSP_GETOSPACE, &info, "GETOSPACE"); + + spec->segsize = info.fragsize; + spec->segtotal = info.fragstotal; + + spec->bytes_per_sample = (spec->width / 8) * spec->channels; + oss->bytes_per_sample = (spec->width / 8) * spec->channels; + + GST_DEBUG_OBJECT (oss, "got segsize: %d, segtotal: %d, value: %08x", + spec->segsize, spec->segtotal, tmp); + + return TRUE; + + /* ERRORS */ +non_block: + { + GST_ELEMENT_ERROR (oss, RESOURCE, SETTINGS, (NULL), + ("Unable to set device %s in non blocking mode: %s", + oss->device, g_strerror (errno))); + return FALSE; + } +wrong_format: + { + GST_ELEMENT_ERROR (oss, RESOURCE, SETTINGS, (NULL), + ("Unable to get format %d", spec->format)); + return FALSE; + } +dodgy_width: + { + GST_ELEMENT_ERROR (oss, RESOURCE, SETTINGS, (NULL), + ("unexpected width %d", spec->width)); + return FALSE; + } +} + +static gboolean +gst_oss_sink_unprepare (GstAudioSink * asink) +{ + /* could do a SNDCTL_DSP_RESET, but the OSS manual recommends a close/open */ + + if (!gst_oss_sink_close (asink)) + goto couldnt_close; + + if (!gst_oss_sink_open (asink)) + goto couldnt_reopen; + + return TRUE; + + /* ERRORS */ +couldnt_close: + { + GST_DEBUG_OBJECT (asink, "Could not close the audio device"); + return FALSE; + } +couldnt_reopen: + { + GST_DEBUG_OBJECT (asink, "Could not reopen the audio device"); + return FALSE; + } +} + +static guint +gst_oss_sink_write (GstAudioSink * asink, gpointer data, guint length) +{ + return write (GST_OSSSINK (asink)->fd, data, length); +} + +static guint +gst_oss_sink_delay (GstAudioSink * asink) +{ + GstOssSink *oss; + gint delay = 0; + gint ret; + + oss = GST_OSSSINK (asink); + +#ifdef SNDCTL_DSP_GETODELAY + ret = ioctl (oss->fd, SNDCTL_DSP_GETODELAY, &delay); +#else + ret = -1; +#endif + if (ret < 0) { + audio_buf_info info; + + ret = ioctl (oss->fd, SNDCTL_DSP_GETOSPACE, &info); + + delay = (ret < 0 ? 0 : (info.fragstotal * info.fragsize) - info.bytes); + } + return delay / oss->bytes_per_sample; +} + +static void +gst_oss_sink_reset (GstAudioSink * asink) +{ + /* There's nothing we can do here really: OSS can't handle access to the + * same device/fd from multiple threads and might deadlock or blow up in + * other ways if we try an ioctl SNDCTL_DSP_RESET or similar */ +} |