gstreamer/sys/oss/gstosssink.c
Ronald S. Bultje 2cb6e77679 sys/oss/gstosssink.c: Latest fixes for A/V sync, audio playback and such. This is about all... MPEG playback issues a...
Original commit message from CVS:
* sys/oss/gstosssink.c: (gst_osssink_init), (gst_osssink_get_time),
(gst_osssink_chain), (gst_osssink_change_state):
Latest fixes for A/V sync, audio playback and such. This is about
all... MPEG playback issues are mostly related to the async build-
up of MPEG files, I cannot fix that. Use basicgthread to solve it.
2004-03-11 04:08:44 +00:00

628 lines
19 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 <string.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);
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);
GST_DEBUG ("initializing osssink");
osssink->bufsize = 4096;
osssink->chunk_size = 4096;
osssink->mute = FALSE;
osssink->sync = TRUE;
osssink->resync = 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)
{
GstCaps *newcaps;
GstStructure *structure;
newcaps = gst_caps_new_full (gst_structure_copy(gst_caps_get_structure (caps, 0)), NULL);
structure = gst_caps_get_structure (newcaps, 0);
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 gint
gst_osssink_get_delay (GstOssSink *osssink)
{
gint delay = 0;
gint ret;
if (GST_OSSELEMENT (osssink)->fd == -1)
return 0;
#ifdef SNDCTL_DSP_GETODELAY
ret = ioctl (GST_OSSELEMENT (osssink)->fd, SNDCTL_DSP_GETODELAY, &delay);
#else
ret = -1;
#endif
if (ret < 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;
GstClockTimeDiff 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
* thomas: with proper handling of the return value, this doesn't seem to
* happen anymore, so remove the second code path after april 2004 */
if (delay > (gint64) osssink->handled) {
/*g_warning ("Delay %d > osssink->handled %" G_GUINT64_FORMAT
", setting to osssink->handled",
delay, osssink->handled);*/
delay = osssink->handled;
}
res = ((gint64) osssink->handled - delay) * GST_SECOND / GST_OSSELEMENT (osssink)->bps;
if (res < 0)
res = 0;
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;
GstClockTimeDiff buftime, soundtime, elementtime;
guchar *data;
guint to_write;
gint delay;
/* 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, 0);
gst_audio_clock_set_active (GST_AUDIO_CLOCK (osssink->provided_clock), FALSE);
gst_pad_event_default (pad, event);
return;
case GST_EVENT_DISCONTINUOUS:
osssink->resync = TRUE;
/* pass-through */
default:
gst_pad_event_default (pad, event);
return;
}
g_assert_not_reached ();
}
if (!GST_OSSELEMENT (osssink)->bps) {
gst_buffer_unref (buf);
GST_ELEMENT_ERROR (osssink, CORE, NEGOTIATION, (NULL), ("format wasn't negotiated before chain function"));
return;
}
data = GST_BUFFER_DATA (buf);
to_write = GST_BUFFER_SIZE (buf);
/* sync audio with buffers timestamp. elementtime is the *current* time.
* soundtime is the time if the soundcard has processed all queued data. */
elementtime = gst_element_get_time (GST_ELEMENT (osssink));
delay = gst_osssink_get_delay (osssink);
if (delay < 0)
delay = 0;
soundtime = elementtime + delay * GST_SECOND / GST_OSSELEMENT (osssink)->bps;
if (GST_BUFFER_TIMESTAMP_IS_VALID (buf)) {
buftime = GST_BUFFER_TIMESTAMP (buf);
} else {
buftime = soundtime;
}
GST_LOG_OBJECT (osssink, "time: real %"G_GUINT64_FORMAT", buffer: %"G_GUINT64_FORMAT,
soundtime, buftime);
if (MAX (buftime, soundtime) - MIN (buftime, soundtime) > (GST_SECOND / 10)) {
/* we need to adjust to the buffers here */
GST_INFO_OBJECT (osssink, "need sync: real %"G_GUINT64_FORMAT", buffer: %"G_GUINT64_FORMAT,
soundtime, buftime);
if (soundtime > buftime) {
/* do *not* throw frames out. It's useless. The next frame will come in
* too late. And the next one. And so on. We don't want to lose sound.
* This is a placeholder for what - some day - should become QoS, i.e.
* sending events upstream to drop buffers. */
} else {
guint64 to_handle = (((buftime - soundtime) * GST_OSSELEMENT(osssink)->bps / GST_SECOND) /
((GST_OSSELEMENT (osssink)->width / 8) * GST_OSSELEMENT (osssink)->channels)) *
(GST_OSSELEMENT (osssink)->width / 8) * GST_OSSELEMENT (osssink)->channels;
if (!osssink->resync) {
guint8 *buf = g_new (guint8, to_handle);
memset (buf, (GST_OSSELEMENT (osssink)->width == 8) ? 0 : 128, to_handle);
while (to_handle > 0) {
gint done = write (GST_OSSELEMENT (osssink)->fd, buf,
MIN (to_handle, osssink->chunk_size));
if (done == -1 && errno != EINTR) {
break;
} else {
to_handle -= done;
osssink->handled += done;
}
}
g_free(buf);
} else {
/* Timestamps at start-of-stream (MPEG) or after seek (hey,
* again MPEG!) can be borken, therefore this hacklet. */
osssink->handled += to_handle;
}
}
}
if (GST_OSSELEMENT (osssink)->fd >= 0 && to_write > 0) {
if (!osssink->mute) {
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;
}
}
} else {
g_warning ("muting osssinks unimplemented wrt clocks!");
}
}
gst_audio_clock_update_time ((GstAudioClock*)osssink->provided_clock, gst_osssink_get_time (osssink->provided_clock, osssink));
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_element_get_time (GST_ELEMENT (osssink)),
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:
gst_audio_clock_set_active (GST_AUDIO_CLOCK (osssink->provided_clock), 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);
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));
osssink->handled = 0;
osssink->resync = TRUE;
break;
default:
break;
}
if (GST_ELEMENT_CLASS (parent_class)->change_state)
return GST_ELEMENT_CLASS (parent_class)->change_state (element);
return GST_STATE_SUCCESS;
}