gstreamer/sys/oss/gstosssink.c
Colin Walters c2f54315b1 Return NULL if we can't fixate the caps anymore.
Original commit message from CVS:
Return NULL if we can't fixate the caps anymore.
2003-12-24 17:01:00 +00:00

607 lines
18 KiB
C

/* GStreamer
* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
* 2000 Wim Taymans <wim.taymans@chello.be>
*
* 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.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <sys/ioctl.h>
#include <sys/soundcard.h>
#include <errno.h>
#include <unistd.h>
#include "gstosssink.h"
/* elementfactory information */
static GstElementDetails gst_osssink_details = GST_ELEMENT_DETAILS (
"Audio Sink (OSS)",
"Sink/Audio",
"Output to a sound card via OSS",
"Erik Walthinsen <omega@cse.ogi.edu>, "
"Wim Taymans <wim.taymans@chello.be>"
);
static void gst_osssink_base_init (gpointer g_class);
static void gst_osssink_class_init (GstOssSinkClass *klass);
static void gst_osssink_init (GstOssSink *osssink);
static void gst_osssink_dispose (GObject *object);
static GstElementStateReturn gst_osssink_change_state (GstElement *element);
static void gst_osssink_set_clock (GstElement *element, GstClock *clock);
static GstClock* gst_osssink_get_clock (GstElement *element);
static GstClockTime gst_osssink_get_time (GstClock *clock, gpointer data);
static const GstFormat* gst_osssink_get_formats (GstPad *pad);
static gboolean gst_osssink_convert (GstPad *pad, GstFormat src_format, gint64 src_value,
GstFormat *dest_format, gint64 *dest_value);
static const GstQueryType* gst_osssink_get_query_types (GstPad *pad);
static gboolean gst_osssink_query (GstElement *element, GstQueryType type,
GstFormat *format, gint64 *value);
static gboolean gst_osssink_sink_query (GstPad *pad, GstQueryType type,
GstFormat *format, gint64 *value);
static GstCaps * gst_osssink_sink_fixate (GstPad *pad, const GstCaps *caps, gpointer user_data);
static GstPadLinkReturn gst_osssink_sinkconnect (GstPad *pad, const GstCaps *caps);
static void gst_osssink_set_property (GObject *object, guint prop_id, const GValue *value,
GParamSpec *pspec);
static void gst_osssink_get_property (GObject *object, guint prop_id, GValue *value,
GParamSpec *pspec);
static void gst_osssink_chain (GstPad *pad,GstData *_data);
/* OssSink signals and args */
enum {
SIGNAL_HANDOFF,
LAST_SIGNAL
};
enum {
ARG_0,
ARG_MUTE,
ARG_FRAGMENT,
ARG_BUFFER_SIZE,
ARG_SYNC,
ARG_CHUNK_SIZE,
/* FILL ME */
};
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) BYTE_ORDER, "
"signed = (boolean) { TRUE, FALSE }, "
"width = (int) { 8, 16 }, "
"depth = (int) { 8, 16 }, "
"rate = (int) [ 1000, 48000 ], "
"channels = (int) [ 1, 2 ]"
)
);
static GstElementClass *parent_class = NULL;
static guint gst_osssink_signals[LAST_SIGNAL] = { 0 };
GType
gst_osssink_get_type (void)
{
static GType osssink_type = 0;
if (!osssink_type) {
static const GTypeInfo osssink_info = {
sizeof(GstOssSinkClass),
gst_osssink_base_init,
NULL,
(GClassInitFunc)gst_osssink_class_init,
NULL,
NULL,
sizeof(GstOssSink),
0,
(GInstanceInitFunc)gst_osssink_init,
};
osssink_type = g_type_register_static (GST_TYPE_OSSELEMENT, "GstOssSink", &osssink_info, 0);
}
return osssink_type;
}
static void
gst_osssink_dispose (GObject *object)
{
GstOssSink *osssink = (GstOssSink *) object;
gst_object_unparent (GST_OBJECT (osssink->provided_clock));
G_OBJECT_CLASS (parent_class)->dispose (object);
}
static void
gst_osssink_base_init (gpointer g_class)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
gst_element_class_set_details (element_class, &gst_osssink_details);
gst_element_class_add_pad_template (element_class, gst_static_pad_template_get (&osssink_sink_factory));
}
static void
gst_osssink_class_init (GstOssSinkClass *klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
gobject_class = (GObjectClass*)klass;
gstelement_class = (GstElementClass*)klass;
parent_class = g_type_class_ref(GST_TYPE_OSSELEMENT);
g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_MUTE,
g_param_spec_boolean ("mute", "Mute", "Mute the audio",
FALSE, G_PARAM_READWRITE));
g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_SYNC,
g_param_spec_boolean ("sync", "Sync", "If syncing on timestamps should be enabled",
TRUE, G_PARAM_READWRITE));
g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_FRAGMENT,
g_param_spec_int ("fragment", "Fragment",
"The fragment as 0xMMMMSSSS (MMMM = total fragments, 2^SSSS = fragment size)",
0, G_MAXINT, 6, G_PARAM_READWRITE));
g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_BUFFER_SIZE,
g_param_spec_uint ("buffer_size", "Buffer size", "Size of buffers in osssink's bufferpool (bytes)",
0, G_MAXINT, 4096, G_PARAM_READWRITE));
g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_CHUNK_SIZE,
g_param_spec_uint ("chunk_size", "Chunk size", "Write data in chunk sized buffers",
0, G_MAXUINT, 4096, G_PARAM_READWRITE));
gst_osssink_signals[SIGNAL_HANDOFF] =
g_signal_new ("handoff", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GstOssSinkClass, handoff), NULL, NULL,
g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0);
gobject_class->set_property = gst_osssink_set_property;
gobject_class->get_property = gst_osssink_get_property;
gobject_class->dispose = gst_osssink_dispose;
gstelement_class->change_state = GST_DEBUG_FUNCPTR (gst_osssink_change_state);
gstelement_class->query = GST_DEBUG_FUNCPTR (gst_osssink_query);
gstelement_class->set_clock = gst_osssink_set_clock;
gstelement_class->get_clock = gst_osssink_get_clock;
}
static void
gst_osssink_init (GstOssSink *osssink)
{
osssink->sinkpad = gst_pad_new_from_template (
gst_static_pad_template_get (&osssink_sink_factory), "sink");
gst_element_add_pad (GST_ELEMENT (osssink), osssink->sinkpad);
gst_pad_set_link_function (osssink->sinkpad, gst_osssink_sinkconnect);
gst_pad_set_fixate_function (osssink->sinkpad, gst_osssink_sink_fixate);
gst_pad_set_convert_function (osssink->sinkpad, gst_osssink_convert);
gst_pad_set_query_function (osssink->sinkpad, gst_osssink_sink_query);
gst_pad_set_query_type_function (osssink->sinkpad, gst_osssink_get_query_types);
gst_pad_set_formats_function (osssink->sinkpad, gst_osssink_get_formats);
gst_pad_set_chain_function (osssink->sinkpad, gst_osssink_chain);
osssink->bufsize = 4096;
osssink->chunk_size = 4096;
osssink->resync = FALSE;
osssink->mute = FALSE;
osssink->sync = TRUE;
osssink->provided_clock = gst_audio_clock_new ("ossclock", gst_osssink_get_time, osssink);
gst_object_set_parent (GST_OBJECT (osssink->provided_clock), GST_OBJECT (osssink));
osssink->handled = 0;
GST_FLAG_SET (osssink, GST_ELEMENT_THREAD_SUGGESTED);
GST_FLAG_SET (osssink, GST_ELEMENT_EVENT_AWARE);
}
static GstCaps *
gst_osssink_sink_fixate (GstPad *pad, const GstCaps *caps, gpointer user_data)
{
GstCaps *newcaps;
GstStructure *structure;
structure = gst_structure_copy(gst_caps_get_structure (caps, 0));
newcaps = gst_caps_new_full (structure, NULL);
if (gst_caps_structure_fixate_field_nearest_int (structure, "rate", 44100)) {
return newcaps;
}
if (gst_caps_structure_fixate_field_nearest_int (structure, "depth", 16)) {
return newcaps;
}
if (gst_caps_structure_fixate_field_nearest_int (structure, "width", 16)) {
return newcaps;
}
if (gst_caps_structure_fixate_field_nearest_int (structure, "channels", 2)) {
return newcaps;
}
gst_caps_free (newcaps);
return NULL;
}
static GstPadLinkReturn
gst_osssink_sinkconnect (GstPad *pad, const GstCaps *caps)
{
GstOssSink *osssink = GST_OSSSINK (gst_pad_get_parent (pad));
if (!gst_osselement_parse_caps (GST_OSSELEMENT (osssink), caps))
return GST_PAD_LINK_REFUSED;
if (!gst_osselement_sync_parms (GST_OSSELEMENT (osssink))) {
return GST_PAD_LINK_REFUSED;
}
return GST_PAD_LINK_OK;
}
static inline gint64
gst_osssink_get_delay (GstOssSink *osssink)
{
gint delay = 0;
if (GST_OSSELEMENT (osssink)->fd == -1)
return 0;
if (ioctl (GST_OSSELEMENT (osssink)->fd, SNDCTL_DSP_GETODELAY, &delay) < 0) {
audio_buf_info info;
if (ioctl (GST_OSSELEMENT (osssink)->fd, SNDCTL_DSP_GETOSPACE, &info) < 0) {
delay = 0;
}
else {
delay = (info.fragstotal * info.fragsize) - info.bytes;
}
}
return delay;
}
static GstClockTime
gst_osssink_get_time (GstClock *clock, gpointer data)
{
GstOssSink *osssink = GST_OSSSINK (data);
gint delay;
GstClockTime res;
if (!GST_OSSELEMENT (osssink)->bps)
return 0;
delay = gst_osssink_get_delay (osssink);
/* sometimes delay is bigger than the number of bytes sent to the device,
* which screws up this calculation, we assume that everything is still
* in the device then */
if (((guint64)delay) > osssink->handled) {
delay = osssink->handled;
}
res = (osssink->handled - delay) * GST_SECOND / GST_OSSELEMENT (osssink)->bps;
return res;
}
static GstClock*
gst_osssink_get_clock (GstElement *element)
{
GstOssSink *osssink;
osssink = GST_OSSSINK (element);
return GST_CLOCK (osssink->provided_clock);
}
static void
gst_osssink_set_clock (GstElement *element, GstClock *clock)
{
GstOssSink *osssink;
osssink = GST_OSSSINK (element);
osssink->clock = clock;
}
static void
gst_osssink_chain (GstPad *pad, GstData *_data)
{
GstBuffer *buf = GST_BUFFER (_data);
GstOssSink *osssink;
GstClockTime buftime;
/* this has to be an audio buffer */
osssink = GST_OSSSINK (gst_pad_get_parent (pad));
if (GST_IS_EVENT (buf)) {
GstEvent *event = GST_EVENT (buf);
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_EOS:
ioctl (GST_OSSELEMENT (osssink)->fd, SNDCTL_DSP_SYNC);
gst_audio_clock_set_active (GST_AUDIO_CLOCK (osssink->provided_clock), FALSE);
gst_pad_event_default (pad, event);
return;
case GST_EVENT_DISCONTINUOUS:
{
gint64 value;
ioctl (GST_OSSELEMENT (osssink)->fd, SNDCTL_DSP_RESET);
if (gst_event_discont_get_value (event, GST_FORMAT_TIME, &value)) {
if (!gst_clock_handle_discont (osssink->clock, value))
gst_audio_clock_set_active (GST_AUDIO_CLOCK (osssink->provided_clock), FALSE);
osssink->handled = 0;
}
osssink->resync = TRUE;
break;
}
default:
gst_pad_event_default (pad, event);
return;
}
gst_event_unref (event);
return;
}
if (!GST_OSSELEMENT (osssink)->bps) {
gst_buffer_unref (buf);
gst_element_error (GST_ELEMENT (osssink), "capsnego was never performed, unknown data type");
return;
}
buftime = GST_BUFFER_TIMESTAMP (buf);
if (GST_OSSELEMENT (osssink)->fd >= 0) {
if (!osssink->mute) {
guchar *data = GST_BUFFER_DATA (buf);
gint size = GST_BUFFER_SIZE (buf);
gint to_write = 0;
if (osssink->clock) {
gint delay = 0;
gint64 queued;
GstClockTimeDiff jitter;
delay = gst_osssink_get_delay (osssink);
queued = delay * GST_SECOND / GST_OSSELEMENT (osssink)->bps;
if (osssink->resync && osssink->sync) {
GstClockID id = gst_clock_new_single_shot_id (osssink->clock, buftime - queued);
gst_element_clock_wait (GST_ELEMENT (osssink), id, &jitter);
gst_clock_id_free (id);
if (jitter >= 0) {
gst_clock_handle_discont (osssink->clock, buftime - queued + jitter);
to_write = size;
gst_audio_clock_set_active ((GstAudioClock*)osssink->provided_clock, TRUE);
osssink->resync = FALSE;
}
}
else {
to_write = size;
}
}
/* no clock, try to be as fast as possible */
else {
audio_buf_info ospace;
ioctl (GST_OSSELEMENT (osssink)->fd, SNDCTL_DSP_GETOSPACE, &ospace);
if (ospace.bytes >= size) {
to_write = size;
}
}
while (to_write > 0) {
gint done = write (GST_OSSELEMENT (osssink)->fd, data,
MIN (to_write, osssink->chunk_size));
if (done == -1) {
if (errno != EINTR)
break;
}
else {
to_write -= done;
data += done;
osssink->handled += done;
}
}
}
}
gst_audio_clock_update_time ((GstAudioClock*)osssink->provided_clock, buftime);
gst_buffer_unref (buf);
}
static const GstFormat*
gst_osssink_get_formats (GstPad *pad)
{
static const GstFormat formats[] = {
GST_FORMAT_TIME,
GST_FORMAT_DEFAULT,
GST_FORMAT_BYTES,
0
};
return formats;
}
static gboolean
gst_osssink_convert (GstPad *pad, GstFormat src_format, gint64 src_value,
GstFormat *dest_format, gint64 *dest_value)
{
GstOssSink *osssink;
osssink = GST_OSSSINK (gst_pad_get_parent (pad));
return gst_osselement_convert (GST_OSSELEMENT (osssink),
src_format, src_value,
dest_format, dest_value);
}
static const GstQueryType*
gst_osssink_get_query_types (GstPad *pad)
{
static const GstQueryType query_types[] = {
GST_QUERY_LATENCY,
GST_QUERY_POSITION,
0,
};
return query_types;
}
static gboolean
gst_osssink_sink_query (GstPad *pad, GstQueryType type, GstFormat *format, gint64 *value)
{
gboolean res = TRUE;
GstOssSink *osssink;
osssink = GST_OSSSINK (gst_pad_get_parent (pad));
switch (type) {
case GST_QUERY_LATENCY:
if (!gst_osssink_convert (pad,
GST_FORMAT_BYTES, gst_osssink_get_delay (osssink),
format, value))
{
res = FALSE;
}
break;
case GST_QUERY_POSITION:
if (!gst_osssink_convert (pad,
GST_FORMAT_TIME, gst_clock_get_time (osssink->provided_clock),
format, value))
{
res = FALSE;
}
break;
default:
res = gst_pad_query (gst_pad_get_peer (osssink->sinkpad), type, format, value);
break;
}
return res;
}
static gboolean
gst_osssink_query (GstElement *element, GstQueryType type, GstFormat *format, gint64 *value)
{
GstOssSink *osssink = GST_OSSSINK (element);
return gst_osssink_sink_query (osssink->sinkpad, type, format, value);
}
static void
gst_osssink_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec)
{
GstOssSink *osssink;
osssink = GST_OSSSINK (object);
switch (prop_id) {
case ARG_MUTE:
osssink->mute = g_value_get_boolean (value);
g_object_notify (G_OBJECT (osssink), "mute");
break;
case ARG_FRAGMENT:
GST_OSSELEMENT (osssink)->fragment = g_value_get_int (value);
gst_osselement_sync_parms (GST_OSSELEMENT (osssink));
break;
case ARG_BUFFER_SIZE:
osssink->bufsize = g_value_get_uint (value);
g_object_notify (object, "buffer_size");
break;
case ARG_SYNC:
osssink->sync = g_value_get_boolean (value);
g_object_notify (G_OBJECT (osssink), "sync");
break;
case ARG_CHUNK_SIZE:
osssink->chunk_size = g_value_get_uint (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_osssink_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec)
{
GstOssSink *osssink;
osssink = GST_OSSSINK (object);
switch (prop_id) {
case ARG_MUTE:
g_value_set_boolean (value, osssink->mute);
break;
case ARG_FRAGMENT:
g_value_set_int (value, GST_OSSELEMENT (osssink)->fragment);
break;
case ARG_BUFFER_SIZE:
g_value_set_uint (value, osssink->bufsize);
break;
case ARG_SYNC:
g_value_set_boolean (value, osssink->sync);
break;
case ARG_CHUNK_SIZE:
g_value_set_uint (value, osssink->chunk_size);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static GstElementStateReturn
gst_osssink_change_state (GstElement *element)
{
GstOssSink *osssink;
osssink = GST_OSSSINK (element);
switch (GST_STATE_TRANSITION (element)) {
case GST_STATE_READY_TO_PAUSED:
break;
case GST_STATE_PAUSED_TO_PLAYING:
osssink->resync = TRUE;
break;
case GST_STATE_PLAYING_TO_PAUSED:
if (GST_FLAG_IS_SET (element, GST_OSSSINK_OPEN))
ioctl (GST_OSSELEMENT (osssink)->fd, SNDCTL_DSP_RESET, 0);
gst_audio_clock_set_active (GST_AUDIO_CLOCK (osssink->provided_clock), FALSE);
osssink->resync = TRUE;
break;
case GST_STATE_PAUSED_TO_READY:
if (GST_FLAG_IS_SET (element, GST_OSSSINK_OPEN))
ioctl (GST_OSSELEMENT (osssink)->fd, SNDCTL_DSP_RESET, 0);
gst_osselement_reset (GST_OSSELEMENT (osssink));
break;
default:
break;
}
if (GST_ELEMENT_CLASS (parent_class)->change_state)
return GST_ELEMENT_CLASS (parent_class)->change_state (element);
return GST_STATE_SUCCESS;
}