summaryrefslogtreecommitdiffstats
path: root/sys/dxr3/dxr3audiosink.c
diff options
context:
space:
mode:
authorRonald S. Bultje <rbultje@ronald.bitfreak.net>2003-05-29 14:35:24 +0000
committerRonald S. Bultje <rbultje@ronald.bitfreak.net>2003-05-29 14:35:24 +0000
commit2c98438c994b119256ded007808f153a4a5b6f6a (patch)
treecec3d0eb0bc69a3aa6bdfd5cafab8fa81de69b93 /sys/dxr3/dxr3audiosink.c
parentbbd6f9804b1465a921dfe9c141ae511f1ebcb3e4 (diff)
downloadgst-plugins-bad-2c98438c994b119256ded007808f153a4a5b6f6a.tar.gz
gst-plugins-bad-2c98438c994b119256ded007808f153a4a5b6f6a.tar.bz2
gst-plugins-bad-2c98438c994b119256ded007808f153a4a5b6f6a.zip
I'm too lazy to comment this
Original commit message from CVS: New dxr3 plugins from Martin Soto <soto@informatik.uni-kl.de>
Diffstat (limited to 'sys/dxr3/dxr3audiosink.c')
-rw-r--r--sys/dxr3/dxr3audiosink.c810
1 files changed, 810 insertions, 0 deletions
diff --git a/sys/dxr3/dxr3audiosink.c b/sys/dxr3/dxr3audiosink.c
new file mode 100644
index 00000000..41012096
--- /dev/null
+++ b/sys/dxr3/dxr3audiosink.c
@@ -0,0 +1,810 @@
+/* GStreamer
+ * Copyright (C) 2003 Martin Soto <martinsoto@users.sourceforge.net>
+ *
+ * dxr3audiosink.c: Audio sink for em8300 based DVD cards.
+ *
+ * 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 <errno.h>
+#include <string.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <sys/ioctl.h>
+
+#include <linux/soundcard.h>
+#include <linux/em8300.h>
+
+#include <gst/gst.h>
+
+#include "dxr3audiosink.h"
+#include "dxr3marshal.h"
+#include "dxr3common.h"
+
+/* Our only supported AC3 byte rate. */
+#define AC3_BYTE_RATE 48000
+
+/* Determines the amount of time to play the given number of bytes of
+ the original AC3 stream. The result is expressed as MPEG2. */
+#define TIME_FOR_BYTES(bytes) (((bytes) * 90) / 48)
+
+
+/* ElementFactory information. */
+static GstElementDetails dxr3audiosink_details = {
+ "dxr3/Hollywood+ mpeg decoder board audio plugin",
+ "audio/raw|a52",
+ "GPL",
+ "Feeds audio to Sigma Designs em8300 based boards",
+ VERSION,
+ "Martin Soto <martinsoto@users.sourceforge.net>",
+ "(C) 2003",
+};
+
+
+/* Dxr3AudioSink signals and args */
+enum {
+ SIGNAL_FLUSHED,
+ LAST_SIGNAL
+};
+
+enum {
+ ARG_0,
+ ARG_DIGITAL_PCM
+};
+
+
+GST_PAD_TEMPLATE_FACTORY (dxr3audiosink_pcm_sink_factory,
+ "pcm_sink",
+ GST_PAD_SINK,
+ GST_PAD_ALWAYS,
+ GST_CAPS_NEW (
+ "dxr3audiosink_pcm_sink",
+ "audio/raw",
+ "format", GST_PROPS_STRING ("int"),
+ "law", GST_PROPS_INT (0),
+ "endianness", GST_PROPS_INT (G_BYTE_ORDER),
+ "signed", GST_PROPS_BOOLEAN (TRUE),
+ "width", GST_PROPS_INT (16),
+ "depth", GST_PROPS_INT (16),
+ "rate", GST_PROPS_LIST (
+ GST_PROPS_INT (32000),
+ GST_PROPS_INT (44100),
+ GST_PROPS_INT (48000),
+ GST_PROPS_INT (66000)
+ ),
+ "channels", GST_PROPS_INT (2)
+ )
+)
+
+GST_PAD_TEMPLATE_FACTORY (dxr3audiosink_ac3_sink_factory,
+ "ac3_sink",
+ GST_PAD_SINK,
+ GST_PAD_ALWAYS,
+ GST_CAPS_NEW (
+ "dxr3audiosink_ac3_sink",
+ "audio/a52",
+ NULL
+ )
+)
+
+
+GST_PAD_EVENT_MASK_FUNCTION(dxr3audiosink_get_event_mask,
+ { GST_EVENT_FLUSH, 0 },
+ { GST_EVENT_DISCONTINUOUS, 0 },
+ { GST_EVENT_NEW_MEDIA, 0 },
+ { GST_EVENT_EOS, 0 }
+)
+
+
+static void dxr3audiosink_class_init (Dxr3AudioSinkClass *klass);
+static void dxr3audiosink_init (Dxr3AudioSink *sink);
+
+static void dxr3audiosink_set_property (GObject *object,
+ guint prop_id,
+ const GValue *value,
+ GParamSpec *pspec);
+static void dxr3audiosink_get_property (GObject *object,
+ guint prop_id,
+ GValue *value,
+ GParamSpec *pspec);
+
+static gboolean dxr3audiosink_open (Dxr3AudioSink *sink);
+static gboolean dxr3audiosink_set_mode_pcm (Dxr3AudioSink *sink);
+static gboolean dxr3audiosink_set_mode_ac3 (Dxr3AudioSink *sink);
+static void dxr3audiosink_close (Dxr3AudioSink *sink);
+static void dxr3audiosink_set_clock (GstElement *element,
+ GstClock *clock);
+
+static GstPadLinkReturn dxr3audiosink_pcm_sinklink (GstPad *pad,
+ GstCaps *caps);
+static void dxr3audiosink_set_scr (Dxr3AudioSink *sink,
+ guint32 scr);
+
+static gboolean dxr3audiosink_handle_event (GstPad *pad,
+ GstEvent *event);
+static void dxr3audiosink_chain_pcm (GstPad *pad,GstBuffer *buf);
+static void dxr3audiosink_chain_ac3 (GstPad *pad, GstBuffer *buf);
+
+/* static void dxr3audiosink_wait (Dxr3AudioSink *sink, */
+/* GstClockTime time); */
+/* static int dxr3audiosink_mvcommand (Dxr3AudioSink *sink, */
+/* int command); */
+
+static GstElementStateReturn dxr3audiosink_change_state (GstElement *element);
+
+static void dxr3audiosink_flushed (Dxr3AudioSink *sink);
+
+static GstElementClass *parent_class = NULL;
+static guint dxr3audiosink_signals[LAST_SIGNAL] = { 0 };
+
+
+extern GType
+dxr3audiosink_get_type (void)
+{
+ static GType dxr3audiosink_type = 0;
+
+ if (!dxr3audiosink_type) {
+ static const GTypeInfo dxr3audiosink_info = {
+ sizeof(Dxr3AudioSinkClass),
+ NULL,
+ NULL,
+ (GClassInitFunc) dxr3audiosink_class_init,
+ NULL,
+ NULL,
+ sizeof (Dxr3AudioSink),
+ 0,
+ (GInstanceInitFunc) dxr3audiosink_init,
+ };
+ dxr3audiosink_type = g_type_register_static (GST_TYPE_ELEMENT,
+ "Dxr3AudioSink",
+ &dxr3audiosink_info, 0);
+ }
+
+ return dxr3audiosink_type;
+}
+
+
+static void
+dxr3audiosink_class_init (Dxr3AudioSinkClass *klass)
+{
+ GObjectClass *gobject_class;
+ GstElementClass *gstelement_class;
+
+ gobject_class = (GObjectClass*)klass;
+ gstelement_class = (GstElementClass*)klass;
+
+ parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
+
+ dxr3audiosink_signals[SIGNAL_FLUSHED] =
+ g_signal_new ("flushed", G_TYPE_FROM_CLASS (klass),
+ G_SIGNAL_RUN_LAST,
+ G_STRUCT_OFFSET (Dxr3AudioSinkClass, flushed),
+ NULL, NULL,
+ dxr3_marshal_VOID__VOID,
+ G_TYPE_NONE, 0);
+
+ klass->flushed = dxr3audiosink_flushed;
+
+ g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_DIGITAL_PCM,
+ g_param_spec_boolean ("digital-pcm", "Digital PCM",
+ "Use the digital output for PCM sound",
+ FALSE, G_PARAM_READWRITE));
+
+ gobject_class->set_property = dxr3audiosink_set_property;
+ gobject_class->get_property = dxr3audiosink_get_property;
+
+ gstelement_class->change_state = dxr3audiosink_change_state;
+ gstelement_class->set_clock = dxr3audiosink_set_clock;
+}
+
+
+static void
+dxr3audiosink_init (Dxr3AudioSink *sink)
+{
+ GstCaps *caps;
+ GstPadTemplate *temp;
+
+ /* Create the PCM pad. */
+ temp = GST_PAD_TEMPLATE_GET (dxr3audiosink_pcm_sink_factory);
+ sink->pcm_sinkpad = gst_pad_new_from_template (temp, "pcm_sink");
+ gst_pad_set_chain_function (sink->pcm_sinkpad, dxr3audiosink_chain_pcm);
+ gst_pad_set_link_function (sink->pcm_sinkpad, dxr3audiosink_pcm_sinklink);
+ gst_element_add_pad (GST_ELEMENT (sink), sink->pcm_sinkpad);
+
+ /* Create the AC3 pad. */
+ temp = GST_PAD_TEMPLATE_GET (dxr3audiosink_ac3_sink_factory);
+ sink->ac3_sinkpad = gst_pad_new_from_template (temp, "ac3_sink");
+ caps = gst_pad_template_get_caps (temp);
+ gst_pad_try_set_caps (sink->ac3_sinkpad, caps);
+ gst_caps_unref (caps);
+ gst_pad_set_chain_function (sink->ac3_sinkpad, dxr3audiosink_chain_ac3);
+ gst_element_add_pad (GST_ELEMENT (sink), sink->ac3_sinkpad);
+
+ GST_FLAG_SET (GST_ELEMENT(sink), GST_ELEMENT_EVENT_AWARE);
+ gst_pad_set_event_function (sink->pcm_sinkpad, dxr3audiosink_handle_event);
+ gst_pad_set_event_mask_function (sink->pcm_sinkpad,
+ dxr3audiosink_get_event_mask);
+ gst_pad_set_event_function (sink->ac3_sinkpad, dxr3audiosink_handle_event);
+ gst_pad_set_event_mask_function (sink->ac3_sinkpad,
+ dxr3audiosink_get_event_mask);
+
+ sink->card_number = 0;
+
+ sink->audio_filename = NULL;
+ sink->audio_fd = -1;
+
+ sink->control_filename = NULL;
+ sink->control_fd = -1;
+
+ /* Since we don't know any better, we set the initial scr to 0. */
+ sink->scr = 0;
+
+ /* Initially don't use digital output. */
+ sink->digital_pcm = FALSE;
+
+ /* Initially there's no padder.*/
+ sink->padder = NULL;
+
+ sink->mode = DXR3AUDIOSINK_MODE_NONE;
+}
+
+
+static void
+dxr3audiosink_set_property (GObject *object, guint prop_id,
+ const GValue *value, GParamSpec *pspec)
+{
+ Dxr3AudioSink *sink;
+
+ /* it's not null if we got it, but it might not be ours */
+ sink = DXR3AUDIOSINK (object);
+
+ switch (prop_id) {
+ case ARG_DIGITAL_PCM:
+ sink->digital_pcm = g_value_get_boolean (value);
+ /* Refresh the setup of the device. */
+ if (sink->mode == DXR3AUDIOSINK_MODE_PCM) {
+ dxr3audiosink_set_mode_pcm (sink);
+ }
+ g_object_notify (G_OBJECT (sink), "digital-pcm");
+ break;
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+ break;
+ }
+}
+
+
+static void
+dxr3audiosink_get_property (GObject *object, guint prop_id,
+ GValue *value, GParamSpec *pspec)
+{
+ Dxr3AudioSink *sink;
+
+ /* it's not null if we got it, but it might not be ours */
+ g_return_if_fail (GST_IS_DXR3AUDIOSINK (object));
+
+ sink = DXR3AUDIOSINK (object);
+
+ switch (prop_id) {
+ case ARG_DIGITAL_PCM:
+ g_value_set_boolean (value, sink->digital_pcm);
+ break;
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+ break;
+ }
+}
+
+
+static gboolean
+dxr3audiosink_open (Dxr3AudioSink *sink)
+{
+ g_return_val_if_fail (!GST_FLAG_IS_SET (sink,
+ DXR3AUDIOSINK_OPEN), FALSE);
+
+ /* Compute the name of the audio device file. */
+ sink->audio_filename = g_strdup_printf ("/dev/em8300_ma-%d",
+ sink->card_number );
+
+ sink->audio_fd = open (sink->audio_filename, O_WRONLY);
+ if (sink->audio_fd < 0) {
+ gst_element_error (GST_ELEMENT (sink),
+ g_strconcat ("Error opening device file \"",
+ sink->audio_filename, "\": ",
+ g_strerror (errno), NULL));
+ return FALSE;
+ }
+
+ /* Open the control device. */
+ sink->control_filename = g_strdup_printf ("/dev/em8300-%d",
+ sink->card_number );
+
+ sink->control_fd = open (sink->control_filename, O_WRONLY);
+ if (sink->control_fd < 0) {
+ gst_element_error (GST_ELEMENT (sink),
+ g_strconcat ("Error opening device file \"",
+ sink->control_filename, "\": ",
+ g_strerror (errno), NULL));
+ return FALSE;
+ }
+
+ GST_FLAG_SET (sink, DXR3AUDIOSINK_OPEN);
+
+ dxr3audiosink_set_mode_pcm (sink);
+
+ return TRUE;
+}
+
+
+/**
+ * dxr3audiosink_set_mode:
+ * @sink: The sink element to operate on.
+ *
+ * Set the operation mode of the element to PCM.
+ */
+static gboolean
+dxr3audiosink_set_mode_pcm (Dxr3AudioSink *sink)
+{
+ int tmp, oss_mode, audiomode;
+
+ if (sink->audio_fd == -1 || sink->control_fd == -1) {
+ return FALSE;
+ }
+
+ /* Set the audio device mode. */
+ oss_mode = (G_BYTE_ORDER == G_BIG_ENDIAN ? AFMT_S16_BE : AFMT_S16_LE);
+ tmp = oss_mode;
+ if (ioctl (sink->audio_fd, SNDCTL_DSP_SETFMT, &tmp) < 0 ||
+ tmp != oss_mode) {
+ gst_element_error (GST_ELEMENT (sink),
+ g_strconcat ("Error configuring device mode for \"",
+ sink->audio_filename, "\": ",
+ g_strerror (errno), NULL));
+ return FALSE;
+ }
+
+ /* Set the card's general audio output mode. */
+ audiomode = sink->digital_pcm ?
+ EM8300_AUDIOMODE_DIGITALPCM : EM8300_AUDIOMODE_ANALOG;
+ ioctl (sink->control_fd, EM8300_IOCTL_SET_AUDIOMODE, &audiomode);
+
+ /* Set the sampling rate. */
+ tmp = sink->rate;
+ if (ioctl (sink->audio_fd, SNDCTL_DSP_SPEED, &tmp) < 0) {
+ gst_element_error (GST_ELEMENT (sink),
+ g_strconcat ("Error configuring device "
+ "sampling rate for \"",
+ sink->audio_filename, "\": ",
+ g_strerror (errno), NULL));
+ return FALSE;
+ }
+
+ /* Get rid of the padder, if any. */
+ if (sink->padder != NULL) {
+ g_free(sink->padder);
+ sink->padder = NULL;
+ }
+
+ sink->mode = DXR3AUDIOSINK_MODE_PCM;
+
+ return TRUE;
+}
+
+
+/**
+ * dxr3audiosink_set_mode:
+ * @sink: The sink element to operate on
+ *
+ * Set the operation mode of the element to AC3.
+ */
+static gboolean
+dxr3audiosink_set_mode_ac3 (Dxr3AudioSink *sink)
+{
+ int tmp, audiomode;
+
+ if (sink->audio_fd == -1 || sink->control_fd == -1) {
+ return FALSE;
+ }
+
+ /* Set the sampling rate. */
+ tmp = AC3_BYTE_RATE;
+ if (ioctl (sink->audio_fd, SNDCTL_DSP_SPEED, &tmp) < 0 ||
+ tmp != AC3_BYTE_RATE) {
+ gst_element_error (GST_ELEMENT (sink),
+ g_strconcat ("Error configuring device "
+ "sampling rate for \"",
+ sink->audio_filename, "\": ",
+ g_strerror (errno), NULL));
+ return FALSE;
+ }
+
+ /* Set the card's general audio output mode to AC3. */
+ audiomode = EM8300_AUDIOMODE_DIGITALAC3;
+ ioctl (sink->control_fd, EM8300_IOCTL_SET_AUDIOMODE, &audiomode);
+
+ /* Create a padder if necessary, */
+ if (sink->padder == NULL) {
+ sink->padder = g_malloc (sizeof(ac3_padder));
+ ac3p_init(sink->padder);
+ }
+
+ sink->mode = DXR3AUDIOSINK_MODE_AC3;
+
+ return TRUE;
+}
+
+
+static void
+dxr3audiosink_close (Dxr3AudioSink *sink)
+{
+ g_return_if_fail (GST_FLAG_IS_SET (sink, DXR3AUDIOSINK_OPEN));
+
+ if (close (sink->audio_fd) != 0) {
+ gst_element_error (GST_ELEMENT (sink),
+ g_strconcat ("Error closing file \"",
+ sink->audio_filename, "\": ",
+ g_strerror (errno), NULL));
+ return;
+ }
+
+ if (close (sink->control_fd) != 0) {
+ gst_element_error (GST_ELEMENT (sink),
+ g_strconcat ("Error closing file \"",
+ sink->control_filename, "\": ",
+ g_strerror (errno), NULL));
+ return;
+ }
+
+ GST_FLAG_UNSET (sink, DXR3AUDIOSINK_OPEN);
+
+ g_free (sink->audio_filename);
+ sink->audio_filename = NULL;
+
+ g_free (sink->control_filename);
+ sink->control_filename = NULL;
+
+ /* Get rid of the padder, if any. */
+ if (sink->padder != NULL) {
+ g_free(sink->padder);
+ sink->padder = NULL;
+ }
+}
+
+
+static void
+dxr3audiosink_set_clock (GstElement *element, GstClock *clock)
+{
+ Dxr3AudioSink *src = DXR3AUDIOSINK (element);
+
+ src->clock = clock;
+}
+
+
+static GstPadLinkReturn
+dxr3audiosink_pcm_sinklink (GstPad *pad, GstCaps *caps)
+{
+ Dxr3AudioSink *sink = DXR3AUDIOSINK (gst_pad_get_parent (pad));
+ const gchar* mimetype;
+ gint rate;
+
+ if (!GST_CAPS_IS_FIXED(caps)) {
+ return GST_PAD_LINK_DELAYED;
+ }
+
+ mimetype = gst_caps_get_mime(caps);
+ if (strcmp (mimetype, "audio/raw") != 0) {
+ return GST_PAD_LINK_REFUSED;
+ }
+
+ if (!gst_caps_has_property (caps, "rate")) {
+ return GST_PAD_LINK_REFUSED;
+ }
+
+ gst_caps_get_int (caps, "rate", &rate);
+ if (rate != 32000 && rate != 44100 &&
+ rate != 48000 && rate != 66000) {
+ return GST_PAD_LINK_DELAYED;
+ }
+ sink->rate = rate;
+
+ return GST_PAD_LINK_OK;
+}
+
+
+static void
+dxr3audiosink_set_scr (Dxr3AudioSink *sink, guint32 scr)
+{
+ guint32 zero = 0;
+
+/* fprintf (stderr, "====== Adjusting SCR\n"); */
+ ioctl (sink->control_fd, EM8300_IOCTL_SCR_SET, &zero);
+ ioctl (sink->control_fd, EM8300_IOCTL_SCR_SET, &scr);
+}
+
+
+static gboolean
+dxr3audiosink_handle_event (GstPad *pad, GstEvent *event)
+{
+ GstEventType type;
+ Dxr3AudioSink *sink = DXR3AUDIOSINK (gst_pad_get_parent (pad));
+
+ type = event ? GST_EVENT_TYPE (event) : GST_EVENT_UNKNOWN;
+
+ switch (type) {
+ case GST_EVENT_FLUSH:
+ if (sink->control_fd >= 0) {
+ unsigned audiomode;
+
+ if (sink->mode == DXR3AUDIOSINK_MODE_AC3) {
+ audiomode = EM8300_AUDIOMODE_DIGITALPCM;
+ ioctl (sink->control_fd, EM8300_IOCTL_SET_AUDIOMODE, &audiomode);
+ audiomode = EM8300_AUDIOMODE_DIGITALAC3;
+ ioctl (sink->control_fd, EM8300_IOCTL_SET_AUDIOMODE, &audiomode);
+ }
+
+ /* Report the flush operation. */
+ g_signal_emit (G_OBJECT (sink),
+ dxr3audiosink_signals[SIGNAL_FLUSHED], 0);
+ }
+ break;
+ default:
+ gst_pad_event_default (pad, event);
+ break;
+ }
+
+ return TRUE;
+}
+
+
+static void
+dxr3audiosink_chain_pcm (GstPad *pad, GstBuffer *buf)
+{
+ Dxr3AudioSink *sink;
+ gint bytes_written = 0;
+
+ g_return_if_fail (pad != NULL);
+ g_return_if_fail (GST_IS_PAD (pad));
+ g_return_if_fail (buf != NULL);
+
+ sink = DXR3AUDIOSINK (gst_pad_get_parent (pad));
+
+ if (GST_IS_EVENT (buf)) {
+ dxr3audiosink_handle_event (pad, GST_EVENT (buf));
+ return;
+ }
+
+ if (sink->mode != DXR3AUDIOSINK_MODE_PCM) {
+ /* Switch to PCM mode. */
+ dxr3audiosink_set_mode_pcm (sink);
+ }
+
+ if (GST_FLAG_IS_SET (sink, DXR3AUDIOSINK_OPEN)) {
+ if (GST_BUFFER_TIMESTAMP (buf) != GST_CLOCK_TIME_NONE) {
+ /* We have a new scr value. */
+ sink->scr = GSTTIME_TO_MPEGTIME (GST_BUFFER_TIMESTAMP (buf));
+ }
+
+ /* Update the system reference clock (SCR) in the card. */
+ {
+ unsigned in, out, odelay;
+ unsigned diff;
+
+ ioctl (sink->control_fd, EM8300_IOCTL_SCR_GET, &out);
+
+ ioctl (sink->audio_fd, SNDCTL_DSP_GETODELAY, &odelay);
+
+ in = MPEGTIME_TO_DXRTIME (sink->scr - (odelay * 90) / 192);
+ diff = in > out ? in - out : out - in;
+ if (diff > 1800) {
+ dxr3audiosink_set_scr (sink, in);
+ }
+ }
+
+ /* Update our SCR value. */
+ sink->scr += (unsigned) (GST_BUFFER_SIZE (buf) *
+ (90000.0 / ((float)sink->rate * 4)));
+
+ /* Write the buffer to the sound device. */
+ bytes_written = write (sink->audio_fd, GST_BUFFER_DATA (buf),
+ GST_BUFFER_SIZE (buf));
+ if (bytes_written < GST_BUFFER_SIZE (buf)) {
+ fprintf (stderr, "dxr3audiosink: Warning: %d bytes should be "
+ "written, only %d bytes written\n",
+ GST_BUFFER_SIZE (buf), bytes_written);
+ }
+ }
+
+ gst_buffer_unref (buf);
+}
+
+
+static void
+dxr3audiosink_chain_ac3 (GstPad *pad, GstBuffer *buf)
+{
+ Dxr3AudioSink *sink;
+ gint bytes_written = 0;
+
+ g_return_if_fail (pad != NULL);
+ g_return_if_fail (GST_IS_PAD (pad));
+ g_return_if_fail (buf != NULL);
+
+ sink = DXR3AUDIOSINK (gst_pad_get_parent (pad));
+
+ if (GST_IS_EVENT (buf)) {
+ dxr3audiosink_handle_event (pad, GST_EVENT (buf));
+ return;
+ }
+
+ if (sink->mode != DXR3AUDIOSINK_MODE_AC3) {
+ /* Switch to AC3 mode. */
+ dxr3audiosink_set_mode_ac3 (sink);
+ }
+
+ if (GST_FLAG_IS_SET (sink, DXR3AUDIOSINK_OPEN))
+ {
+ int event;
+
+ if (GST_BUFFER_TIMESTAMP (buf) != GST_CLOCK_TIME_NONE) {
+ /* We have a new scr value. */
+
+/* fprintf (stderr, "------ Audio Time %.04f\n", */
+/* (double) GST_BUFFER_TIMESTAMP (buf) / GST_SECOND); */
+
+ sink->scr = GSTTIME_TO_MPEGTIME (GST_BUFFER_TIMESTAMP (buf));
+ }
+
+ /* Push the new data into the padder. */
+ ac3p_push_data(sink->padder, GST_BUFFER_DATA (buf),
+ GST_BUFFER_SIZE (buf));
+
+ /* Parse the data. */
+ event = ac3p_parse (sink->padder);
+ while (event != AC3P_EVENT_PUSH) {
+ switch (event) {
+ case AC3P_EVENT_FRAME:
+ /* We have a new frame: */
+
+ /* Update the system reference clock (SCR) in the card. */
+ {
+ unsigned in, out, odelay;
+ unsigned diff;
+
+ ioctl (sink->control_fd, EM8300_IOCTL_SCR_GET, &out);
+
+ ioctl (sink->audio_fd, SNDCTL_DSP_GETODELAY, &odelay);
+ /* 192000 bytes/sec */
+
+ in = MPEGTIME_TO_DXRTIME (sink->scr - (odelay * 90) / 192);
+ diff = in > out ? in - out : out - in;
+ if (diff > 1800) {
+ dxr3audiosink_set_scr (sink, in);
+ }
+ }
+
+ /* Update our SCR value. */
+ sink->scr += TIME_FOR_BYTES (ac3p_frame_size (sink->padder));
+
+ /* Write the frame to the sound device. */
+ bytes_written = write (sink->audio_fd, ac3p_frame (sink->padder),
+ AC3P_IEC_FRAME_SIZE);
+
+ if (bytes_written < AC3P_IEC_FRAME_SIZE)
+ {
+ fprintf (stderr, "dxr3audiosink: Warning: %d bytes should be "
+ "written, only %d bytes written\n",
+ AC3P_IEC_FRAME_SIZE, bytes_written);
+ }
+
+ break;
+ }
+
+ event = ac3p_parse (sink->padder);
+ }
+ }
+
+ gst_buffer_unref(buf);
+}
+
+#if 0
+/**
+ * dxr3audiosink_wait:
+ * Make the sink wait the specified amount of time.
+ */
+static void
+dxr3audiosink_wait (Dxr3AudioSink *sink, GstClockTime time)
+{
+ GstClockID id;
+ GstClockTimeDiff jitter;
+ GstClockReturn ret;
+ GstClockTime current_time = gst_clock_get_time (sink->clock);
+
+ id = gst_clock_new_single_shot_id (sink->clock, current_time + time);
+ ret = gst_clock_id_wait (id, &jitter);
+ gst_clock_id_free (id);
+}
+
+
+static int
+dxr3audiosink_mvcommand (Dxr3AudioSink *sink, int command)
+{
+ em8300_register_t regs;
+
+ regs.microcode_register = 1;
+ regs.reg = 0;
+ regs.val = command;
+
+ return ioctl (sink->control_fd, EM8300_IOCTL_WRITEREG, &regs);
+}
+#endif
+
+static GstElementStateReturn
+dxr3audiosink_change_state (GstElement *element)
+{
+ g_return_val_if_fail (GST_IS_DXR3AUDIOSINK (element), GST_STATE_FAILURE);
+
+ if (GST_STATE_PENDING (element) == GST_STATE_NULL) {
+ if (GST_FLAG_IS_SET (element, DXR3AUDIOSINK_OPEN)) {
+ dxr3audiosink_close (DXR3AUDIOSINK (element));
+ }
+ }
+ else {
+ if (!GST_FLAG_IS_SET (element, DXR3AUDIOSINK_OPEN)) {
+ if (!dxr3audiosink_open (DXR3AUDIOSINK (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;
+}
+
+
+/**
+ * dxr3audiosink_flushed:
+ *
+ * Default do nothing implementation for the "flushed" signal. The
+ * "flushed" signal will be fired right after flushing the hardware
+ * queues due to a received flush event
+ */
+static void
+dxr3audiosink_flushed (Dxr3AudioSink *sink)
+{
+ /* Do nothing. */
+}
+
+
+extern gboolean
+dxr3audiosink_factory_init (GstPlugin *plugin)
+{
+ GstElementFactory *factory;
+
+ factory = gst_element_factory_new ("dxr3audiosink",
+ GST_TYPE_DXR3AUDIOSINK,
+ &dxr3audiosink_details);
+ g_return_val_if_fail (factory != NULL, FALSE);
+ gst_element_factory_add_pad_template (factory,
+ GST_PAD_TEMPLATE_GET (dxr3audiosink_pcm_sink_factory));
+ gst_element_factory_add_pad_template (factory,
+ GST_PAD_TEMPLATE_GET (dxr3audiosink_ac3_sink_factory));
+
+ gst_plugin_add_feature (plugin, GST_PLUGIN_FEATURE (factory));
+
+ return TRUE;
+}