gstreamer/libs/gst/base/gstbasesrc.c
Andy Wingo a8259f46f5 gst/base/gstbasesrc.c (gst_basesrc_set_property)
Original commit message from CVS:
2005-04-18  Andy Wingo  <wingo@pobox.com>

* gst/base/gstbasesrc.c (gst_basesrc_set_property)
(gst_basesrc_get_property): BLOCKSIZE is a ULONG. Rename ARG_...
to PROP_....
2005-04-18 08:24:30 +00:00

762 lines
18 KiB
C

/* GStreamer
* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
* 2000,2005 Wim Taymans <wim@fluendo.com>
*
* gstbasesrc.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 <stdlib.h>
#include <string.h>
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include "gstbasesrc.h"
#include "gsttypefindhelper.h"
#include <gst/gstmarshal.h>
#define DEFAULT_BLOCKSIZE 4096
GST_DEBUG_CATEGORY_STATIC (gst_basesrc_debug);
#define GST_CAT_DEFAULT gst_basesrc_debug
/* BaseSrc signals and args */
enum
{
/* FILL ME */
LAST_SIGNAL
};
enum
{
PROP_0,
PROP_BLOCKSIZE,
};
static GstElementClass *parent_class = NULL;
static void gst_basesrc_base_init (gpointer g_class);
static void gst_basesrc_class_init (GstBaseSrcClass * klass);
static void gst_basesrc_init (GstBaseSrc * src, gpointer g_class);
GType
gst_basesrc_get_type (void)
{
static GType basesrc_type = 0;
if (!basesrc_type) {
static const GTypeInfo basesrc_info = {
sizeof (GstBaseSrcClass),
(GBaseInitFunc) gst_basesrc_base_init,
NULL,
(GClassInitFunc) gst_basesrc_class_init,
NULL,
NULL,
sizeof (GstBaseSrc),
0,
(GInstanceInitFunc) gst_basesrc_init,
};
basesrc_type = g_type_register_static (GST_TYPE_ELEMENT,
"GstBaseSrc", &basesrc_info, G_TYPE_FLAG_ABSTRACT);
}
return basesrc_type;
}
static gboolean gst_basesrc_activate (GstPad * pad, GstActivateMode mode);
static void gst_basesrc_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_basesrc_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static gboolean gst_basesrc_event_handler (GstPad * pad, GstEvent * event);
static const GstEventMask *gst_basesrc_get_event_mask (GstPad * pad);
static const GstQueryType *gst_basesrc_get_query_types (GstPad * pad);
static gboolean gst_basesrc_query (GstPad * pad, GstQueryType type,
GstFormat * format, gint64 * value);
static const GstFormat *gst_basesrc_get_formats (GstPad * pad);
static gboolean gst_basesrc_unlock (GstBaseSrc * basesrc);
static gboolean gst_basesrc_get_size (GstBaseSrc * basesrc, guint64 * size);
static gboolean gst_basesrc_start (GstBaseSrc * basesrc);
static gboolean gst_basesrc_stop (GstBaseSrc * basesrc);
static GstElementStateReturn gst_basesrc_change_state (GstElement * element);
static void gst_basesrc_loop (GstPad * pad);
static gboolean gst_basesrc_check_get_range (GstPad * pad);
static GstFlowReturn gst_basesrc_get_range (GstPad * pad, guint64 offset,
guint length, GstBuffer ** buf);
static void
gst_basesrc_base_init (gpointer g_class)
{
GST_DEBUG_CATEGORY_INIT (gst_basesrc_debug, "basesrc", 0, "basesrc element");
}
static void
gst_basesrc_class_init (GstBaseSrcClass * klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
gobject_class = (GObjectClass *) klass;
gstelement_class = (GstElementClass *) klass;
parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
gobject_class->set_property = GST_DEBUG_FUNCPTR (gst_basesrc_set_property);
gobject_class->get_property = GST_DEBUG_FUNCPTR (gst_basesrc_get_property);
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_BLOCKSIZE,
g_param_spec_ulong ("blocksize", "Block size",
"Size in bytes to read per buffer", 1, G_MAXULONG, DEFAULT_BLOCKSIZE,
G_PARAM_READWRITE));
gstelement_class->change_state = GST_DEBUG_FUNCPTR (gst_basesrc_change_state);
}
static void
gst_basesrc_init (GstBaseSrc * basesrc, gpointer g_class)
{
GstPad *pad;
GstPadTemplate *pad_template;
pad_template =
gst_element_class_get_pad_template (GST_ELEMENT_CLASS (g_class), "src");
g_return_if_fail (pad_template != NULL);
pad = gst_pad_new_from_template (pad_template, "src");
gst_pad_set_activate_function (pad, gst_basesrc_activate);
gst_pad_set_event_function (pad, gst_basesrc_event_handler);
gst_pad_set_event_mask_function (pad, gst_basesrc_get_event_mask);
gst_pad_set_query_function (pad, gst_basesrc_query);
gst_pad_set_query_type_function (pad, gst_basesrc_get_query_types);
gst_pad_set_formats_function (pad, gst_basesrc_get_formats);
gst_pad_set_loop_function (pad, gst_basesrc_loop);
gst_pad_set_checkgetrange_function (pad, gst_basesrc_check_get_range);
gst_pad_set_getrange_function (pad, gst_basesrc_get_range);
/* hold ref to pad */
basesrc->srcpad = pad;
gst_element_add_pad (GST_ELEMENT (basesrc), pad);
basesrc->segment_start = -1;
basesrc->segment_end = -1;
basesrc->blocksize = DEFAULT_BLOCKSIZE;
GST_FLAG_UNSET (basesrc, GST_BASESRC_STARTED);
}
static const GstFormat *
gst_basesrc_get_formats (GstPad * pad)
{
static const GstFormat formats[] = {
GST_FORMAT_DEFAULT,
GST_FORMAT_BYTES,
0,
};
return formats;
}
static const GstQueryType *
gst_basesrc_get_query_types (GstPad * pad)
{
static const GstQueryType types[] = {
GST_QUERY_TOTAL,
GST_QUERY_POSITION,
GST_QUERY_START,
GST_QUERY_SEGMENT_END,
0,
};
return types;
}
static gboolean
gst_basesrc_query (GstPad * pad, GstQueryType type,
GstFormat * format, gint64 * value)
{
GstBaseSrc *src = GST_BASESRC (GST_PAD_PARENT (pad));
if (*format == GST_FORMAT_DEFAULT)
*format = GST_FORMAT_BYTES;
switch (type) {
case GST_QUERY_TOTAL:
switch (*format) {
case GST_FORMAT_BYTES:
{
gboolean ret;
ret = gst_basesrc_get_size (src, value);
GST_DEBUG ("getting length %d %lld", ret, *value);
return ret;
}
case GST_FORMAT_PERCENT:
*value = GST_FORMAT_PERCENT_MAX;
return TRUE;
default:
return FALSE;
}
break;
case GST_QUERY_POSITION:
switch (*format) {
case GST_FORMAT_BYTES:
*value = src->offset;
break;
case GST_FORMAT_PERCENT:
if (!gst_basesrc_get_size (src, value))
return FALSE;
*value = src->offset * GST_FORMAT_PERCENT_MAX / *value;
return TRUE;
default:
return FALSE;
}
break;
case GST_QUERY_START:
*value = src->segment_start;
return TRUE;
case GST_QUERY_SEGMENT_END:
*value = src->segment_end;
return TRUE;
default:
return FALSE;
}
return FALSE;
}
static const GstEventMask *
gst_basesrc_get_event_mask (GstPad * pad)
{
static const GstEventMask masks[] = {
{GST_EVENT_SEEK, GST_SEEK_METHOD_CUR | GST_SEEK_METHOD_SET |
GST_SEEK_METHOD_END | GST_SEEK_FLAG_FLUSH |
GST_SEEK_FLAG_SEGMENT_LOOP},
{GST_EVENT_FLUSH, 0},
{GST_EVENT_SIZE, 0},
{0, 0},
};
return masks;
}
static gboolean
gst_basesrc_do_seek (GstBaseSrc * src, GstEvent * event)
{
GstFormat format;
gint64 offset;
format = GST_EVENT_SEEK_FORMAT (event);
/* get seek format */
if (format == GST_FORMAT_DEFAULT)
format = GST_FORMAT_BYTES;
/* we can only seek bytes */
if (format != GST_FORMAT_BYTES)
return FALSE;
/* get seek positions */
offset = GST_EVENT_SEEK_OFFSET (event);
src->segment_start = offset;
src->segment_end = GST_EVENT_SEEK_ENDOFFSET (event);
src->segment_loop = GST_EVENT_SEEK_FLAGS (event) & GST_SEEK_FLAG_SEGMENT_LOOP;
/* send flush start */
gst_pad_push_event (src->srcpad, gst_event_new_flush (FALSE));
/* unblock streaming thread */
gst_basesrc_unlock (src);
/* grab streaming lock */
GST_STREAM_LOCK (src->srcpad);
switch (GST_EVENT_SEEK_METHOD (event)) {
case GST_SEEK_METHOD_SET:
if (offset < 0)
goto error;
src->offset = MIN (offset, src->size);
GST_DEBUG_OBJECT (src, "seek set pending to %" G_GINT64_FORMAT,
src->offset);
break;
case GST_SEEK_METHOD_CUR:
offset += src->offset;
src->offset = CLAMP (offset, 0, src->size);
GST_DEBUG_OBJECT (src, "seek cur pending to %" G_GINT64_FORMAT,
src->offset);
break;
case GST_SEEK_METHOD_END:
if (offset > 0)
goto error;
offset = src->size + offset;
src->offset = MAX (0, offset);
GST_DEBUG_OBJECT (src, "seek end pending to %" G_GINT64_FORMAT,
src->offset);
break;
default:
goto error;
}
/* send flush end */
gst_pad_push_event (src->srcpad, gst_event_new_flush (TRUE));
/* now send discont */
{
GstEvent *event;
event = gst_event_new_discontinuous (1.0,
GST_FORMAT_TIME,
(gint64) src->segment_start, (gint64) src->segment_end, NULL);
gst_pad_push_event (src->srcpad, event);
}
/* and restart the task */
if (GST_RPAD_TASK (src->srcpad)) {
gst_task_start (GST_RPAD_TASK (src->srcpad));
}
GST_STREAM_UNLOCK (src->srcpad);
gst_event_unref (event);
return TRUE;
/* ERROR */
error:
{
GST_DEBUG_OBJECT (src, "seek error");
GST_STREAM_UNLOCK (src->srcpad);
gst_event_unref (event);
return FALSE;
}
}
static gboolean
gst_basesrc_event_handler (GstPad * pad, GstEvent * event)
{
GstBaseSrc *src;
GstBaseSrcClass *bclass;
gboolean result;
src = GST_BASESRC (GST_PAD_PARENT (pad));
bclass = GST_BASESRC_GET_CLASS (src);
if (bclass->event)
result = bclass->event (src, event);
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_SEEK:
return gst_basesrc_do_seek (src, event);
case GST_EVENT_SIZE:
{
GstFormat format;
format = GST_EVENT_SIZE_FORMAT (event);
if (format == GST_FORMAT_DEFAULT)
format = GST_FORMAT_BYTES;
/* we can only accept bytes */
if (format != GST_FORMAT_BYTES)
return FALSE;
src->blocksize = GST_EVENT_SIZE_VALUE (event);
g_object_notify (G_OBJECT (src), "blocksize");
break;
}
case GST_EVENT_FLUSH:
/* cancel any blocking getrange */
if (!GST_EVENT_FLUSH_DONE (event))
gst_basesrc_unlock (src);
break;
default:
break;
}
gst_event_unref (event);
return TRUE;
}
static void
gst_basesrc_set_property (GObject * object, guint prop_id, const GValue * value,
GParamSpec * pspec)
{
GstBaseSrc *src;
src = GST_BASESRC (object);
switch (prop_id) {
case PROP_BLOCKSIZE:
src->blocksize = g_value_get_ulong (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_basesrc_get_property (GObject * object, guint prop_id, GValue * value,
GParamSpec * pspec)
{
GstBaseSrc *src;
src = GST_BASESRC (object);
switch (prop_id) {
case PROP_BLOCKSIZE:
g_value_set_ulong (value, src->blocksize);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static GstFlowReturn
gst_basesrc_get_range_unlocked (GstPad * pad, guint64 offset, guint length,
GstBuffer ** buf)
{
GstFlowReturn ret;
GstBaseSrc *src;
GstBaseSrcClass *bclass;
src = GST_BASESRC (GST_OBJECT_PARENT (pad));
bclass = GST_BASESRC_GET_CLASS (src);
if (!GST_FLAG_IS_SET (src, GST_BASESRC_STARTED))
goto not_started;
if (!bclass->create)
goto no_function;
/* check size */
if (src->size != -1) {
if (offset + length > src->size) {
if (bclass->get_size)
bclass->get_size (src, &src->size);
if (offset + length > src->size) {
length = src->size - offset;
}
}
}
if (length == 0)
return GST_FLOW_UNEXPECTED;
ret = bclass->create (src, offset, length, buf);
return ret;
/* ERROR */
not_started:
{
GST_DEBUG_OBJECT (src, "getrange but not started");
return GST_FLOW_WRONG_STATE;
}
no_function:
{
GST_DEBUG_OBJECT (src, "no create function");
return GST_FLOW_ERROR;
}
}
static GstFlowReturn
gst_basesrc_get_range (GstPad * pad, guint64 offset, guint length,
GstBuffer ** ret)
{
GstFlowReturn fret;
GST_STREAM_LOCK (pad);
fret = gst_basesrc_get_range_unlocked (pad, offset, length, ret);
GST_STREAM_UNLOCK (pad);
return fret;
}
static gboolean
gst_basesrc_check_get_range (GstPad * pad)
{
GstBaseSrc *src;
src = GST_BASESRC (GST_OBJECT_PARENT (pad));
if (!GST_FLAG_IS_SET (src, GST_BASESRC_STARTED)) {
gst_basesrc_start (src);
gst_basesrc_stop (src);
}
return src->seekable;
}
static void
gst_basesrc_loop (GstPad * pad)
{
GstBaseSrc *src;
GstBuffer *buf = NULL;
GstFlowReturn ret;
src = GST_BASESRC (GST_OBJECT_PARENT (pad));
GST_STREAM_LOCK (pad);
ret = gst_basesrc_get_range_unlocked (pad, src->offset, src->blocksize, &buf);
if (ret != GST_FLOW_OK)
goto eos;
src->offset += GST_BUFFER_SIZE (buf);
ret = gst_pad_push (pad, buf);
if (ret != GST_FLOW_OK)
goto pause;
GST_STREAM_UNLOCK (pad);
return;
eos:
{
GST_DEBUG_OBJECT (src, "going to EOS");
gst_task_pause (GST_RPAD_TASK (pad));
gst_pad_push_event (pad, gst_event_new (GST_EVENT_EOS));
GST_STREAM_UNLOCK (pad);
return;
}
pause:
{
GST_DEBUG_OBJECT (src, "pausing task");
gst_task_pause (GST_RPAD_TASK (pad));
GST_STREAM_UNLOCK (pad);
return;
}
}
static gboolean
gst_basesrc_unlock (GstBaseSrc * basesrc)
{
GstBaseSrcClass *bclass;
gboolean result = FALSE;
bclass = GST_BASESRC_GET_CLASS (basesrc);
if (bclass->unlock)
result = bclass->unlock (basesrc);
return result;
}
static gboolean
gst_basesrc_get_size (GstBaseSrc * basesrc, guint64 * size)
{
GstBaseSrcClass *bclass;
gboolean result = FALSE;
bclass = GST_BASESRC_GET_CLASS (basesrc);
if (bclass->get_size)
result = bclass->get_size (basesrc, size);
if (result)
basesrc->size = *size;
return result;
}
static gboolean
gst_basesrc_start (GstBaseSrc * basesrc)
{
GstBaseSrcClass *bclass;
gboolean result;
if (GST_FLAG_IS_SET (basesrc, GST_BASESRC_STARTED))
return TRUE;
bclass = GST_BASESRC_GET_CLASS (basesrc);
if (bclass->start)
result = bclass->start (basesrc);
else
result = TRUE;
if (!result)
goto could_not_start;
GST_FLAG_SET (basesrc, GST_BASESRC_STARTED);
/* start in the beginning */
basesrc->offset = 0;
basesrc->segment_start = 0;
/* figure out the size */
if (bclass->get_size) {
result = bclass->get_size (basesrc, &basesrc->size);
} else {
result = FALSE;
basesrc->size = -1;
}
GST_DEBUG ("size %d %lld", result, basesrc->size);
/* we always run to the end */
basesrc->segment_end = -1;
/* check if we can seek */
if (bclass->is_seekable)
basesrc->seekable = bclass->is_seekable (basesrc);
else
basesrc->seekable = FALSE;
/* run typefind */
#if 0
if (basesrc->seekable) {
GstCaps *caps;
caps = gst_type_find_helper (basesrc->srcpad, basesrc->size);
gst_pad_set_caps (basesrc->srcpad, caps);
}
#endif
return TRUE;
/* ERROR */
could_not_start:
{
GST_DEBUG_OBJECT (basesrc, "could not start");
return FALSE;
}
}
static gboolean
gst_basesrc_stop (GstBaseSrc * basesrc)
{
GstBaseSrcClass *bclass;
gboolean result = TRUE;
if (!GST_FLAG_IS_SET (basesrc, GST_BASESRC_STARTED))
return TRUE;
bclass = GST_BASESRC_GET_CLASS (basesrc);
if (bclass->stop)
result = bclass->stop (basesrc);
if (result)
GST_FLAG_UNSET (basesrc, GST_BASESRC_STARTED);
return result;
}
static gboolean
gst_basesrc_activate (GstPad * pad, GstActivateMode mode)
{
gboolean result;
GstBaseSrc *basesrc;
basesrc = GST_BASESRC (GST_OBJECT_PARENT (pad));
/* prepare subclass first */
switch (mode) {
case GST_ACTIVATE_PUSH:
case GST_ACTIVATE_PULL:
result = gst_basesrc_start (basesrc);
break;
default:
result = TRUE;
break;
}
/* if that failed we can stop here */
if (!result)
goto error_start;
result = FALSE;
switch (mode) {
case GST_ACTIVATE_PUSH:
/* if we have a scheduler we can start the task */
if (GST_ELEMENT_SCHEDULER (basesrc)) {
GST_STREAM_LOCK (pad);
GST_RPAD_TASK (pad) =
gst_scheduler_create_task (GST_ELEMENT_SCHEDULER (basesrc),
(GstTaskFunction) gst_basesrc_loop, pad);
gst_task_start (GST_RPAD_TASK (pad));
GST_STREAM_UNLOCK (pad);
result = TRUE;
}
break;
case GST_ACTIVATE_PULL:
result = TRUE;
break;
case GST_ACTIVATE_NONE:
/* step 1, unblock clock sync (if any) */
/* step 2, make sure streaming finishes */
GST_STREAM_LOCK (pad);
/* step 3, stop the task */
if (GST_RPAD_TASK (pad)) {
gst_task_stop (GST_RPAD_TASK (pad));
gst_object_unref (GST_OBJECT (GST_RPAD_TASK (pad)));
GST_RPAD_TASK (pad) = NULL;
}
GST_STREAM_UNLOCK (pad);
result = TRUE;
break;
}
return result;
/* ERROR */
error_start:
{
GST_DEBUG_OBJECT (basesrc, "failed to start");
return FALSE;
}
}
static GstElementStateReturn
gst_basesrc_change_state (GstElement * element)
{
GstBaseSrc *basesrc;
GstElementStateReturn result = GST_STATE_FAILURE;
GstElementState transition;
basesrc = GST_BASESRC (element);
transition = GST_STATE_TRANSITION (element);
switch (transition) {
case GST_STATE_NULL_TO_READY:
break;
case GST_STATE_READY_TO_PAUSED:
break;
case GST_STATE_PAUSED_TO_PLAYING:
break;
default:
break;
}
result = GST_ELEMENT_CLASS (parent_class)->change_state (element);
switch (transition) {
case GST_STATE_PLAYING_TO_PAUSED:
break;
case GST_STATE_PAUSED_TO_READY:
result = gst_basesrc_stop (basesrc);
break;
case GST_STATE_READY_TO_NULL:
break;
default:
break;
}
return result;
}