/* GStreamer * Copyright (C) 1999,2000 Erik Walthinsen * 2000 Wim Taymans * * gstaudiosrc.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 #include #include #include #include #include #include GstElementDetails gst_audiosrc_details = { "Audio (OSS) Source", "Source/Audio", "Read from the sound card", VERSION, "Erik Walthinsen ", "(C) 1999", }; /* AudioSrc signals and args */ enum { /* FILL ME */ LAST_SIGNAL }; enum { ARG_0, ARG_BYTESPERREAD, ARG_CUROFFSET, ARG_FORMAT, ARG_CHANNELS, ARG_FREQUENCY, }; static void gst_audiosrc_class_init (GstAudioSrcClass *klass); static void gst_audiosrc_init (GstAudioSrc *audiosrc); static void gst_audiosrc_set_arg (GtkObject *object, GtkArg *arg, guint id); static void gst_audiosrc_get_arg (GtkObject *object, GtkArg *arg, guint id); static GstElementStateReturn gst_audiosrc_change_state (GstElement *element); static void gst_audiosrc_close_audio (GstAudioSrc *src); static gboolean gst_audiosrc_open_audio (GstAudioSrc *src); static void gst_audiosrc_sync_parms (GstAudioSrc *audiosrc); static GstBuffer * gst_audiosrc_get (GstPad *pad); static GstElementClass *parent_class = NULL; //static guint gst_audiosrc_signals[LAST_SIGNAL] = { 0 }; GtkType gst_audiosrc_get_type (void) { static GtkType audiosrc_type = 0; if (!audiosrc_type) { static const GtkTypeInfo audiosrc_info = { "GstAudioSrc", sizeof(GstAudioSrc), sizeof(GstAudioSrcClass), (GtkClassInitFunc)gst_audiosrc_class_init, (GtkObjectInitFunc)gst_audiosrc_init, (GtkArgSetFunc)gst_audiosrc_set_arg, (GtkArgGetFunc)gst_audiosrc_get_arg, (GtkClassInitFunc)NULL, }; audiosrc_type = gtk_type_unique (GST_TYPE_ELEMENT, &audiosrc_info); } return audiosrc_type; } static void gst_audiosrc_class_init (GstAudioSrcClass *klass) { GtkObjectClass *gtkobject_class; GstElementClass *gstelement_class; gtkobject_class = (GtkObjectClass*)klass; gstelement_class = (GstElementClass*)klass; parent_class = gtk_type_class (GST_TYPE_ELEMENT); gtk_object_add_arg_type ("GstAudioSrc::bytes_per_read", GTK_TYPE_ULONG, GTK_ARG_READWRITE, ARG_BYTESPERREAD); gtk_object_add_arg_type ("GstAudioSrc::curoffset", GTK_TYPE_ULONG, GTK_ARG_READABLE, ARG_CUROFFSET); gtk_object_add_arg_type ("GstAudioSrc::format", GTK_TYPE_INT, GTK_ARG_READWRITE, ARG_FORMAT); gtk_object_add_arg_type ("GstAudioSrc::channels", GTK_TYPE_INT, GTK_ARG_READWRITE, ARG_CHANNELS); gtk_object_add_arg_type ("GstAudioSrc::frequency", GTK_TYPE_INT, GTK_ARG_READWRITE, ARG_FREQUENCY); gtkobject_class->set_arg = gst_audiosrc_set_arg; gtkobject_class->get_arg = gst_audiosrc_get_arg; gstelement_class->change_state = gst_audiosrc_change_state; } static void gst_audiosrc_init (GstAudioSrc *audiosrc) { audiosrc->srcpad = gst_pad_new ("src", GST_PAD_SRC); gst_pad_set_get_function(audiosrc->srcpad,gst_audiosrc_get); gst_element_add_pad (GST_ELEMENT (audiosrc), audiosrc->srcpad); audiosrc->fd = -1; // audiosrc->meta = (MetaAudioRaw *)gst_meta_new(); // audiosrc->meta->format = AFMT_S16_LE; // audiosrc->meta->channels = 2; // audiosrc->meta->frequency = 44100; // audiosrc->meta->bps = 4; audiosrc->bytes_per_read = 4096; audiosrc->curoffset = 0; audiosrc->seq = 0; } static GstBuffer * gst_audiosrc_get (GstPad *pad) { GstAudioSrc *src; GstBuffer *buf; glong readbytes; g_return_val_if_fail (pad != NULL, NULL); src = GST_AUDIOSRC(gst_pad_get_parent(pad)); // g_print("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_buffer_add_meta(buf,GST_META(newmeta)); // g_print("pushed buffer from soundcard of %d bytes\n",readbytes); return buf; } static void gst_audiosrc_set_arg (GtkObject *object, GtkArg *arg, guint id) { GstAudioSrc *src; /* it's not null if we got it, but it might not be ours */ g_return_if_fail (GST_IS_AUDIOSRC (object)); src = GST_AUDIOSRC (object); switch (id) { case ARG_BYTESPERREAD: src->bytes_per_read = GTK_VALUE_INT (*arg); break; case ARG_FORMAT: src->format = GTK_VALUE_INT (*arg); break; case ARG_CHANNELS: src->channels = GTK_VALUE_INT (*arg); break; case ARG_FREQUENCY: src->frequency = GTK_VALUE_INT (*arg); break; default: break; } } static void gst_audiosrc_get_arg (GtkObject *object, GtkArg *arg, guint id) { GstAudioSrc *src; /* it's not null if we got it, but it might not be ours */ g_return_if_fail (GST_IS_AUDIOSRC (object)); src = GST_AUDIOSRC (object); switch (id) { case ARG_BYTESPERREAD: GTK_VALUE_INT (*arg) = src->bytes_per_read; break; case ARG_FORMAT: GTK_VALUE_INT (*arg) = src->format; break; case ARG_CHANNELS: GTK_VALUE_INT (*arg) = src->channels; break; case ARG_FREQUENCY: GTK_VALUE_INT (*arg) = src->frequency; break; default: arg->type = GTK_TYPE_INVALID; break; } } static GstElementStateReturn gst_audiosrc_change_state (GstElement *element) { g_return_val_if_fail (GST_IS_AUDIOSRC (element), FALSE); /* 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_AUDIOSRC_OPEN)) gst_audiosrc_close_audio (GST_AUDIOSRC (element)); /* otherwise (READY or higher) we need to open the sound card */ } else { if (!GST_FLAG_IS_SET (element, GST_AUDIOSRC_OPEN)) { if (!gst_audiosrc_open_audio (GST_AUDIOSRC (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_audiosrc_open_audio (GstAudioSrc *src) { g_return_val_if_fail (!GST_FLAG_IS_SET (src, GST_AUDIOSRC_OPEN), FALSE); /* first try to open the sound card */ src->fd = open("/dev/dsp", O_RDONLY); /* if we have it, set the default parameters and go have fun */ if (src->fd > 0) { int arg = 0x7fff0006; if (ioctl (src->fd, SNDCTL_DSP_SETFRAGMENT, &arg)) perror("uh"); /* set card state */ gst_audiosrc_sync_parms (src); DEBUG("opened audio\n"); GST_FLAG_SET (src, GST_AUDIOSRC_OPEN); return TRUE; } return FALSE; } static void gst_audiosrc_close_audio (GstAudioSrc *src) { g_return_if_fail (GST_FLAG_IS_SET (src, GST_AUDIOSRC_OPEN)); close(src->fd); src->fd = -1; GST_FLAG_UNSET (src, GST_AUDIOSRC_OPEN); } static void gst_audiosrc_sync_parms (GstAudioSrc *audiosrc) { audio_buf_info ospace; g_return_if_fail (audiosrc != NULL); g_return_if_fail (GST_IS_AUDIOSRC (audiosrc)); g_return_if_fail (audiosrc->fd > 0); ioctl(audiosrc->fd, SNDCTL_DSP_RESET, 0); ioctl(audiosrc->fd, SNDCTL_DSP_SETFMT, &audiosrc->format); ioctl(audiosrc->fd, SNDCTL_DSP_CHANNELS, &audiosrc->channels); ioctl(audiosrc->fd, SNDCTL_DSP_SPEED, &audiosrc->frequency); ioctl(audiosrc->fd, SNDCTL_DSP_GETOSPACE, &ospace); g_print("setting sound card to %dKHz %d bit %s (%d bytes buffer)\n", audiosrc->frequency,audiosrc->format, (audiosrc->channels == 2) ? "stereo" : "mono",ospace.bytes); // audiosrc->meta.format = audiosrc->format; // audiosrc->meta.channels = audiosrc->channels; // audiosrc->meta.frequency = audiosrc->frequency; // audiosrc->sentmeta = FALSE; }