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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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291 lines
8.6 KiB
C
291 lines
8.6 KiB
C
/* Gnome-Streamer
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* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <sys/soundcard.h>
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#include <gstaudiosink.h>
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#include <gst/meta/audioraw.h>
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GstElementDetails gst_audiosink_details = {
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"Audio Sink (OSS)",
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"Sink/Audio",
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"Output to a sound card via OSS",
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VERSION,
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"Erik Walthinsen <omega@cse.ogi.edu>",
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"(C) 1999",
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};
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static gboolean gst_audiosink_open_audio(GstAudioSink *sink);
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static void gst_audiosink_close_audio(GstAudioSink *sink);
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static gboolean gst_audiosink_start(GstElement *element,
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GstElementState state);
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static gboolean gst_audiosink_stop(GstElement *element);
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static gboolean gst_audiosink_change_state(GstElement *element,
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GstElementState state);
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/* AudioSink signals and args */
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enum {
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HANDOFF,
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LAST_SIGNAL
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};
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enum {
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ARG_0,
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/* FILL ME */
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};
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static void gst_audiosink_class_init(GstAudioSinkClass *klass);
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static void gst_audiosink_init(GstAudioSink *audiosink);
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static GstFilterClass *parent_class = NULL;
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static guint gst_audiosink_signals[LAST_SIGNAL] = { 0 };
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static guint16 gst_audiosink_type_audio = 0;
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GtkType
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gst_audiosink_get_type(void) {
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static GtkType audiosink_type = 0;
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if (!audiosink_type) {
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static const GtkTypeInfo audiosink_info = {
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"GstAudioSink",
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sizeof(GstAudioSink),
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sizeof(GstAudioSinkClass),
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(GtkClassInitFunc)gst_audiosink_class_init,
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(GtkObjectInitFunc)gst_audiosink_init,
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(GtkArgSetFunc)NULL,
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(GtkArgGetFunc)NULL,
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(GtkClassInitFunc)NULL,
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};
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audiosink_type = gtk_type_unique(GST_TYPE_FILTER,&audiosink_info);
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}
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if (!gst_audiosink_type_audio)
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gst_audiosink_type_audio = gst_type_find_by_mime("audio/raw");
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return audiosink_type;
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}
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static void
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gst_audiosink_class_init(GstAudioSinkClass *klass) {
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GtkObjectClass *gtkobject_class;
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GstElementClass *gstelement_class;
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gtkobject_class = (GtkObjectClass*)klass;
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gstelement_class = (GstElementClass*)klass;
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parent_class = gtk_type_class(GST_TYPE_FILTER);
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gst_audiosink_signals[HANDOFF] =
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gtk_signal_new("handoff",GTK_RUN_LAST,gtkobject_class->type,
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GTK_SIGNAL_OFFSET(GstAudioSinkClass,handoff),
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gtk_marshal_NONE__POINTER_POINTER,GTK_TYPE_NONE,2,
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GTK_TYPE_POINTER,GTK_TYPE_POINTER);
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gtk_object_class_add_signals(gtkobject_class,gst_audiosink_signals,
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LAST_SIGNAL);
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gstelement_class->start = gst_audiosink_start;
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gstelement_class->stop = gst_audiosink_stop;
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gstelement_class->change_state = gst_audiosink_change_state;
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}
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static void gst_audiosink_init(GstAudioSink *audiosink) {
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audiosink->sinkpad = gst_pad_new("sink",GST_PAD_SINK);
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gst_element_add_pad(GST_ELEMENT(audiosink),audiosink->sinkpad);
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if (!gst_audiosink_type_audio)
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gst_audiosink_type_audio = gst_type_find_by_mime("audio/raw");
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gst_pad_set_type_id(audiosink->sinkpad,gst_audiosink_type_audio);
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gst_pad_set_chain_function(audiosink->sinkpad,gst_audiosink_chain);
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audiosink->fd = -1;
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gst_element_set_state(GST_ELEMENT(audiosink),GST_STATE_COMPLETE);
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}
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void gst_audiosink_sync_parms(GstAudioSink *audiosink) {
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audio_buf_info ospace;
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g_return_if_fail(audiosink != NULL);
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g_return_if_fail(GST_IS_AUDIOSINK(audiosink));
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g_return_if_fail(audiosink->fd > 0);
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ioctl(audiosink->fd,SNDCTL_DSP_RESET,0);
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ioctl(audiosink->fd,SNDCTL_DSP_SETFMT,&audiosink->format);
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ioctl(audiosink->fd,SNDCTL_DSP_CHANNELS,&audiosink->channels);
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ioctl(audiosink->fd,SNDCTL_DSP_SPEED,&audiosink->frequency);
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ioctl(audiosink->fd,SNDCTL_DSP_GETOSPACE,&ospace);
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g_print("setting sound card to %dKHz %d bit %s (%d bytes buffer)\n",
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audiosink->frequency,audiosink->format,
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(audiosink->channels == 2) ? "stereo" : "mono",ospace.bytes);
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}
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GstElement *gst_audiosink_new(gchar *name) {
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GstElement *audiosink = GST_ELEMENT(gtk_type_new(GST_TYPE_AUDIOSINK));
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gst_element_set_name(GST_ELEMENT(audiosink),name);
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return audiosink;
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}
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void gst_audiosink_chain(GstPad *pad,GstBuffer *buf) {
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GstAudioSink *audiosink;
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MetaAudioRaw *meta;
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g_return_if_fail(pad != NULL);
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g_return_if_fail(GST_IS_PAD(pad));
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g_return_if_fail(buf != NULL);
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/* this has to be an audio buffer */
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// g_return_if_fail(((GstMeta *)buf->meta)->type !=
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//gst_audiosink_type_audio);
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audiosink = GST_AUDIOSINK(pad->parent);
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// g_return_if_fail(GST_FLAG_IS_SET(audiosink,GST_STATE_RUNNING));
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meta = (MetaAudioRaw *)gst_buffer_get_first_meta(buf);
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if (meta != NULL) {
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if ((meta->format != audiosink->format) ||
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(meta->channels != audiosink->channels) ||
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(meta->frequency != audiosink->frequency)) {
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audiosink->format = meta->format;
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audiosink->channels = meta->channels;
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audiosink->frequency = meta->frequency;
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gst_audiosink_sync_parms(audiosink);
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g_print("sound device set to format %d, %d channels, %dHz\n",
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audiosink->format,audiosink->channels,audiosink->frequency);
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}
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}
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gtk_signal_emit(GTK_OBJECT(audiosink),gst_audiosink_signals[HANDOFF],
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audiosink);
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if (GST_BUFFER_DATA(buf) != NULL) {
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gst_trace_add_entry(NULL,0,buf,"audiosink: writing to soundcard");
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if (audiosink->fd > 2)
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write(audiosink->fd,GST_BUFFER_DATA(buf),GST_BUFFER_SIZE(buf));
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}
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gst_buffer_unref(buf);
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// g_print("a");
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}
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void gst_audiosink_set_format(GstAudioSink *audiosink,gint format) {
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g_return_if_fail(audiosink != NULL);
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g_return_if_fail(GST_IS_AUDIOSINK(audiosink));
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audiosink->format = format;
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gst_audiosink_sync_parms(audiosink);
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}
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void gst_audiosink_set_channels(GstAudioSink *audiosink,gint channels) {
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g_return_if_fail(audiosink != NULL);
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g_return_if_fail(GST_IS_AUDIOSINK(audiosink));
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audiosink->channels = channels;
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gst_audiosink_sync_parms(audiosink);
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}
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void gst_audiosink_set_frequency(GstAudioSink *audiosink,gint frequency) {
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g_return_if_fail(audiosink != NULL);
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g_return_if_fail(GST_IS_AUDIOSINK(audiosink));
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audiosink->frequency = frequency;
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gst_audiosink_sync_parms(audiosink);
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}
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static gboolean gst_audiosink_open_audio(GstAudioSink *sink) {
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g_return_if_fail(sink->fd == -1);
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g_print("attempting to open sound device\n");
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/* first try to open the sound card */
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sink->fd = open("/dev/dsp",O_RDWR);
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/* if we have it, set the default parameters and go have fun */
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if (sink->fd > 0) {
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/* set card state */
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sink->format = AFMT_S16_LE;
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sink->channels = 2; /* stereo */
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sink->frequency = 44100;
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gst_audiosink_sync_parms(sink);
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g_print("opened audio\n");
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return TRUE;
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}
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return FALSE;
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}
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static void gst_audiosink_close_audio(GstAudioSink *sink) {
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if (sink->fd < 0) return;
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close(sink->fd);
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sink->fd = -1;
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g_print("closed sound device\n");
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}
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static gboolean gst_audiosink_start(GstElement *element,
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GstElementState state) {
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g_return_if_fail(GST_IS_AUDIOSINK(element));
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if (gst_audiosink_open_audio(GST_AUDIOSINK(element)) == TRUE) {
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gst_element_set_state(element,GST_STATE_RUNNING | state);
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return TRUE;
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}
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return FALSE;
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}
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static gboolean gst_audiosink_stop(GstElement *element) {
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g_return_if_fail(GST_IS_AUDIOSINK(element));
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gst_audiosink_close_audio(GST_AUDIOSINK(element));
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gst_element_set_state(element,~GST_STATE_RUNNING);
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return TRUE;
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}
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static gboolean gst_audiosink_change_state(GstElement *element,
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GstElementState state) {
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g_return_if_fail(GST_IS_AUDIOSINK(element));
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switch (state) {
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case GST_STATE_RUNNING:
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if (!gst_audiosink_open_audio(GST_AUDIOSINK(element)))
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return FALSE;
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break;
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case ~GST_STATE_RUNNING:
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gst_audiosink_close_audio(GST_AUDIOSINK(element));
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break;
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default:
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break;
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}
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if (GST_ELEMENT_CLASS(parent_class)->change_state)
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return GST_ELEMENT_CLASS(parent_class)->change_state(element,state);
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return TRUE;
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}
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