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/* GStreamer
* Copyright (C) 2014 Wim Taymans <wim.taymans@gmail.com>
*
* gstdownloadbuffer.h:
*
* 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., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifndef __GST_DOWNLOAD_BUFFER_H__
#define __GST_DOWNLOAD_BUFFER_H__
#include <gst/gst.h>
#include <stdio.h>
#include "gstsparsefile.h"
G_BEGIN_DECLS
#define GST_TYPE_DOWNLOAD_BUFFER \
(gst_download_buffer_get_type())
#define GST_DOWNLOAD_BUFFER(obj) \
(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_DOWNLOAD_BUFFER,GstDownloadBuffer))
#define GST_DOWNLOAD_BUFFER_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_DOWNLOAD_BUFFER,GstDownloadBufferClass))
#define GST_IS_DOWNLOAD_BUFFER(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_DOWNLOAD_BUFFER))
#define GST_IS_DOWNLOAD_BUFFER_CLASS(klass) \
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_DOWNLOAD_BUFFER))
#define GST_DOWNLOAD_BUFFER_CAST(obj) \
((GstDownloadBuffer *)(obj))
typedef struct _GstDownloadBuffer GstDownloadBuffer;
typedef struct _GstDownloadBufferClass GstDownloadBufferClass;
typedef struct _GstDownloadBufferSize GstDownloadBufferSize;
/* used to keep track of sizes (current and max) */
struct _GstDownloadBufferSize
{
guint bytes;
guint64 time;
};
struct _GstDownloadBuffer
{
GstElement element;
/*< private > */
GstPad *sinkpad;
GstPad *srcpad;
/* upstream size in bytes (if downstream is operating in pull mode) */
guint64 upstream_size;
/* flowreturn when srcpad is paused */
GstFlowReturn srcresult;
GstFlowReturn sinkresult;
gboolean unexpected;
/* the queue of data we're keeping our hands on */
GstSparseFile *file;
guint64 write_pos;
guint64 read_pos;
gboolean filling;
GstDownloadBufferSize cur_level;
GstDownloadBufferSize max_level;
gint low_percent; /* low/high watermarks for buffering */
gint high_percent;
/* current buffering state */
gboolean is_buffering;
gint buffering_percent;
/* for measuring input/output rates */
GTimer *in_timer;
gboolean in_timer_started;
gdouble last_in_elapsed;
guint64 bytes_in;
gdouble byte_in_rate;
gdouble byte_in_period;
GTimer *out_timer;
gboolean out_timer_started;
gdouble last_out_elapsed;
guint64 bytes_out;
gdouble byte_out_rate;
GMutex qlock; /* lock for queue (vs object lock) */
gboolean waiting_add;
GCond item_add; /* signals buffers now available for reading */
guint64 waiting_offset;
/* temp location stuff */
gchar *temp_template;
gboolean temp_location_set;
gchar *temp_location;
gboolean temp_remove;
gint temp_fd;
gboolean seeking;
GstEvent *stream_start_event;
GstEvent *segment_event;
volatile gint downstream_may_block;
};
struct _GstDownloadBufferClass
{
GstElementClass parent_class;
};
G_GNUC_INTERNAL GType gst_download_buffer_get_type (void);
G_END_DECLS
#endif /* __GST_DOWNLOAD_BUFFER_H__ */
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