diff options
Diffstat (limited to 'sys/oss/gstosssrc.c')
| -rw-r--r-- | sys/oss/gstosssrc.c | 419 |
1 files changed, 419 insertions, 0 deletions
diff --git a/sys/oss/gstosssrc.c b/sys/oss/gstosssrc.c new file mode 100644 index 00000000..ede0be37 --- /dev/null +++ b/sys/oss/gstosssrc.c @@ -0,0 +1,419 @@ +/* GStreamer + * Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu> + * 2000 Wim Taymans <wtay@chello.be> + * + * gstosssrc.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. + */ + +#include <sys/types.h> +#include <sys/stat.h> +#include <fcntl.h> +#include <sys/soundcard.h> +#include <sys/ioctl.h> +#include <unistd.h> + +#include <gstosssrc.h> + +//#define WEIRD_THING /* show the weird thing with 44100 KHz rec */ + +static GstElementDetails gst_osssrc_details = { + "Audio Source (OSS)", + "Source/Audio", + "Read from the sound card", + VERSION, + "Erik Walthinsen <omega@cse.ogi.edu>", + "(C) 1999", +}; + + +/* OssSrc signals and args */ +enum { + /* FILL ME */ + LAST_SIGNAL +}; + +enum { + ARG_0, + ARG_DEVICE, + ARG_BYTESPERREAD, + ARG_CUROFFSET, + ARG_FORMAT, + ARG_CHANNELS, + ARG_FREQUENCY +}; + +GST_PADTEMPLATE_FACTORY (osssrc_src_factory, + "src", + GST_PAD_SRC, + GST_PAD_ALWAYS, + GST_CAPS_NEW ( + "osssrc_src", + "audio/raw", + "format", GST_PROPS_STRING ("int"), + "law", GST_PROPS_INT (0), + "endianness", GST_PROPS_INT (G_BYTE_ORDER), + "signed", GST_PROPS_LIST ( + GST_PROPS_BOOLEAN (TRUE), + GST_PROPS_BOOLEAN (FALSE) + ), + "width", GST_PROPS_LIST ( + GST_PROPS_INT (8), + GST_PROPS_INT (16) + ), + "depth", GST_PROPS_LIST ( + GST_PROPS_INT (8), + GST_PROPS_INT (16) + ), + "rate", GST_PROPS_INT_RANGE (8000, 48000), + "channels", GST_PROPS_INT_RANGE (1, 2) + ) +) + +static void gst_osssrc_class_init (GstOssSrcClass *klass); +static void gst_osssrc_init (GstOssSrc *osssrc); + +static void gst_osssrc_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec); +static void gst_osssrc_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec); +static GstElementStateReturn gst_osssrc_change_state (GstElement *element); + +static void gst_osssrc_close_audio (GstOssSrc *src); +static gboolean gst_osssrc_open_audio (GstOssSrc *src); +static void gst_osssrc_sync_parms (GstOssSrc *osssrc); + +static GstBuffer * gst_osssrc_get (GstPad *pad); + +static GstElementClass *parent_class = NULL; +//static guint gst_osssrc_signals[LAST_SIGNAL] = { 0 }; + +GType +gst_osssrc_get_type (void) +{ + static GType osssrc_type = 0; + + if (!osssrc_type) { + static const GTypeInfo osssrc_info = { + sizeof(GstOssSrcClass), + NULL, + NULL, + (GClassInitFunc)gst_osssrc_class_init, + NULL, + NULL, + sizeof(GstOssSrc), + 0, + (GInstanceInitFunc)gst_osssrc_init, + }; + osssrc_type = g_type_register_static (GST_TYPE_ELEMENT, "GstOssSrc", &osssrc_info, 0); + } + return osssrc_type; +} + +static void +gst_osssrc_class_init (GstOssSrcClass *klass) +{ + GObjectClass *gobject_class; + GstElementClass *gstelement_class; + + gobject_class = (GObjectClass*)klass; + gstelement_class = (GstElementClass*)klass; + + parent_class = g_type_class_ref (GST_TYPE_ELEMENT); + + g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_BYTESPERREAD, + g_param_spec_ulong("bytes_per_read","bytes_per_read","bytes_per_read", + 0,G_MAXULONG,0,G_PARAM_READWRITE)); // CHECKME + g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_CUROFFSET, + g_param_spec_ulong("curoffset","curoffset","curoffset", + 0,G_MAXULONG,0,G_PARAM_READABLE)); // CHECKME + g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_FORMAT, + g_param_spec_int("format","format","format", + G_MININT,G_MAXINT,0,G_PARAM_READWRITE)); // CHECKME + g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_CHANNELS, + g_param_spec_int("channels","channels","channels", + G_MININT,G_MAXINT,0,G_PARAM_READWRITE)); // CHECKME + g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_FREQUENCY, + g_param_spec_int("frequency","frequency","frequency", + G_MININT,G_MAXINT,0,G_PARAM_READWRITE)); // CHECKME + g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_DEVICE, + g_param_spec_string("device","device","oss device (/dev/dspN usually)", + "default",G_PARAM_READWRITE)); + + gobject_class->set_property = gst_osssrc_set_property; + gobject_class->get_property = gst_osssrc_get_property; + + gstelement_class->change_state = gst_osssrc_change_state; +} + +static void +gst_osssrc_init (GstOssSrc *osssrc) +{ + osssrc->srcpad = gst_pad_new_from_template ( + GST_PADTEMPLATE_GET (osssrc_src_factory), "src"); + gst_pad_set_get_function(osssrc->srcpad,gst_osssrc_get); + gst_element_add_pad (GST_ELEMENT (osssrc), osssrc->srcpad); + + osssrc->device = g_strdup ("/dev/dsp"); + osssrc->fd = -1; + + /* adding some default values */ + osssrc->format = AFMT_S16_LE; + osssrc->channels = 2; + osssrc->frequency = 44100; + + osssrc->bytes_per_read = 4096; + osssrc->curoffset = 0; + osssrc->seq = 0; +} + +static GstBuffer * +gst_osssrc_get (GstPad *pad) +{ + GstOssSrc *src; + GstBuffer *buf; + glong readbytes; + + g_return_val_if_fail (pad != NULL, NULL); + src = GST_OSSSRC(gst_pad_get_parent (pad)); + + GST_DEBUG (0, "attempting to read something from soundcard\n"); + + buf = gst_buffer_new (); + g_return_val_if_fail (buf, NULL); + + GST_BUFFER_DATA (buf) = (gpointer)g_malloc (src->bytes_per_read); + + readbytes = read (src->fd,GST_BUFFER_DATA (buf), + src->bytes_per_read); + + if (readbytes == 0) { + gst_element_signal_eos (GST_ELEMENT (src)); + return NULL; + } + + GST_BUFFER_SIZE (buf) = readbytes; + GST_BUFFER_OFFSET (buf) = src->curoffset; + + src->curoffset += readbytes; + + GST_DEBUG (0, "pushed buffer from soundcard of %ld bytes\n", readbytes); + return buf; +} + +static void +gst_osssrc_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec) +{ + GstOssSrc *src; + + /* it's not null if we got it, but it might not be ours */ + g_return_if_fail (GST_IS_OSSSRC (object)); + + src = GST_OSSSRC (object); + + switch (prop_id) { + case ARG_BYTESPERREAD: + src->bytes_per_read = g_value_get_ulong (value); + break; + case ARG_FORMAT: + src->format = g_value_get_int (value); + break; + case ARG_CHANNELS: + src->channels = g_value_get_int (value); + break; + case ARG_FREQUENCY: + src->frequency = g_value_get_int (value); + break; + case ARG_CUROFFSET: + src->curoffset = g_value_get_int (value); + break; + case ARG_DEVICE: + g_free(src->device); + src->device = g_strdup (g_value_get_string (value)); + break; + default: + break; + } +} + +static void +gst_osssrc_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec) +{ + GstOssSrc *src; + + /* it's not null if we got it, but it might not be ours */ + g_return_if_fail (GST_IS_OSSSRC (object)); + + src = GST_OSSSRC (object); + + switch (prop_id) { + case ARG_BYTESPERREAD: + g_value_set_ulong (value, src->bytes_per_read); + break; + case ARG_FORMAT: + g_value_set_int (value, src->format); + break; + case ARG_CHANNELS: + g_value_set_int (value, src->channels); + break; + case ARG_FREQUENCY: + g_value_set_int (value, src->frequency); + break; + case ARG_CUROFFSET: + g_value_set_ulong (value, src->curoffset); + break; + case ARG_DEVICE: + g_value_set_string (value, src->device); + break; + default: + G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); + break; + } +} + +static GstElementStateReturn +gst_osssrc_change_state (GstElement *element) +{ + g_return_val_if_fail (GST_IS_OSSSRC (element), FALSE); + GST_DEBUG (0, "osssrc: state change\n"); + /* if going down into NULL state, close the file if it's open */ + if (GST_STATE_PENDING (element) == GST_STATE_NULL) { + if (GST_FLAG_IS_SET (element, GST_OSSSRC_OPEN)) + gst_osssrc_close_audio (GST_OSSSRC (element)); + /* otherwise (READY or higher) we need to open the sound card */ + } else { + GST_DEBUG (0, "DEBUG: osssrc: ready or higher\n"); + + if (!GST_FLAG_IS_SET (element, GST_OSSSRC_OPEN)) { + if (!gst_osssrc_open_audio (GST_OSSSRC (element))) + return GST_STATE_FAILURE; + } + } + + if (GST_ELEMENT_CLASS (parent_class)->change_state) + return GST_ELEMENT_CLASS (parent_class)->change_state (element); + + return GST_STATE_SUCCESS; +} + +static gboolean +gst_osssrc_open_audio (GstOssSrc *src) +{ + g_return_val_if_fail (!GST_FLAG_IS_SET (src, GST_OSSSRC_OPEN), FALSE); + + /* first try to open the sound card */ + src->fd = open(src->device, O_RDONLY); + + /* if we have it, set the default parameters and go have fun */ + if (src->fd > 0) { + + /* set card state */ + gst_osssrc_sync_parms (src); + GST_DEBUG (0,"opened audio: %s\n",src->device); + + GST_FLAG_SET (src, GST_OSSSRC_OPEN); + return TRUE; + } + + return FALSE; +} + +static void +gst_osssrc_close_audio (GstOssSrc *src) +{ + g_return_if_fail (GST_FLAG_IS_SET (src, GST_OSSSRC_OPEN)); + + close(src->fd); + src->fd = -1; + + GST_FLAG_UNSET (src, GST_OSSSRC_OPEN); +} + +static void +gst_osssrc_sync_parms (GstOssSrc *osssrc) +{ + audio_buf_info ispace; + gint frag; + /* hack : ioctl on frequency seems to *change* the frequency + maybe this is right, but at least for 44100 Khz, it + gives unexpected results ! */ + + guint frequency; + + g_return_if_fail (osssrc != NULL); + g_return_if_fail (GST_IS_OSSSRC (osssrc)); + g_return_if_fail (osssrc->fd > 0); + + frequency = osssrc->frequency; + + frag = 0x7fff0006; + + ioctl(osssrc->fd, SNDCTL_DSP_SETFRAGMENT, &frag); + ioctl(osssrc->fd, SNDCTL_DSP_RESET, 0); + + ioctl(osssrc->fd, SNDCTL_DSP_SETFMT, &osssrc->format); + ioctl(osssrc->fd, SNDCTL_DSP_CHANNELS, &osssrc->channels); +#ifdef WEIRD_THING + g_print ("DEBUG: do you want to see A Weird Thing (TM) ?\n"); + g_print ("DEBUG: then set osssrc to a 44100 frequency and check these numbers.\n"); + g_print ("DEBUG: osssrc frequency before ioctl: %d\n", osssrc->frequency); +#endif + ioctl(osssrc->fd, SNDCTL_DSP_SPEED, &osssrc->frequency); +#ifdef WEIRD_THING + g_print ("DEBUG: osssrc frequency after ioctl : %d\n", osssrc->frequency); + g_print ("DEBUG: redoing ioctl using a temp variable, and resetting osssrc->frequency\n"); + osssrc->frequency = frequency; + ioctl(osssrc->fd, SNDCTL_DSP_SPEED, &frequency); +#endif + ioctl(osssrc->fd, SNDCTL_DSP_GETISPACE, &ispace); + ioctl(osssrc->fd, SNDCTL_DSP_GETBLKSIZE, &frag); + + g_print("setting sound card to %dKHz %d bit %s (%d bytes buffer, %d fragment)\n", + osssrc->frequency, osssrc->format, + (osssrc->channels == 2) ? "stereo" : "mono", ispace.bytes, frag); + + /* set caps on src pad */ + gst_pad_set_caps (osssrc->srcpad, gst_caps_new ( + "oss_src", + "audio/raw", + gst_props_new ( + "format", GST_PROPS_STRING ("int"), + "law", GST_PROPS_INT (0), //FIXME + "endianness", GST_PROPS_INT (G_BYTE_ORDER), //FIXME + "signed", GST_PROPS_BOOLEAN (TRUE), //FIXME + "width", GST_PROPS_INT (osssrc->format), + "depth", GST_PROPS_INT (osssrc->format), + "rate", GST_PROPS_INT (osssrc->frequency), + "channels", GST_PROPS_INT (osssrc->channels), + NULL + ) + )); +} + +gboolean +gst_osssrc_factory_init (GstPlugin *plugin) +{ + GstElementFactory *factory; + + factory = gst_elementfactory_new ("osssrc", GST_TYPE_OSSSRC, &gst_osssrc_details); + g_return_val_if_fail (factory != NULL, FALSE); + + gst_elementfactory_add_padtemplate (factory, GST_PADTEMPLATE_GET (osssrc_src_factory)); + + gst_plugin_add_feature (plugin, GST_PLUGIN_FEATURE (factory)); + + return TRUE; +} + |