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ext/ogg/: Added an ogg muxer.

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Original commit message from CVS:
* ext/ogg/gstogg.c: (plugin_init):
* ext/ogg/gstoggdemux.c: (gst_ogg_demux_plugin_init),
(gst_ogg_print):
* ext/ogg/gstoggmux.c: (gst_ogg_mux_get_type),
(gst_ogg_mux_base_init), (gst_ogg_mux_class_init),
(gst_ogg_mux_get_sink_event_masks), (gst_ogg_mux_init),
(gst_ogg_mux_sinkconnect), (gst_ogg_mux_pad_link),
(gst_ogg_mux_pad_unlink), (gst_ogg_mux_request_new_pad),
(gst_ogg_mux_handle_src_event), (gst_ogg_mux_next_buffer),
(gst_ogg_mux_push_page), (gst_ogg_mux_compare_pads),
(gst_ogg_mux_queue_pads), (gst_ogg_mux_loop),
(gst_ogg_mux_get_property), (gst_ogg_mux_set_property),
(gst_ogg_mux_change_state), (gst_ogg_mux_plugin_init):
Added an ogg muxer.
Small typo fixes in the demuxer.
This commit is contained in:
Wim Taymans 2004-05-10 13:34:57 +00:00
parent 299b599bd1
commit a694bd08f9
4 changed files with 749 additions and 12 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

18
ChangeLog
View file

@ -1,3 +1,21 @@
2004-05-10 Wim Taymans <wim@fluendo.com>
* ext/ogg/gstogg.c: (plugin_init):
* ext/ogg/gstoggdemux.c: (gst_ogg_demux_plugin_init),
(gst_ogg_print):
* ext/ogg/gstoggmux.c: (gst_ogg_mux_get_type),
(gst_ogg_mux_base_init), (gst_ogg_mux_class_init),
(gst_ogg_mux_get_sink_event_masks), (gst_ogg_mux_init),
(gst_ogg_mux_sinkconnect), (gst_ogg_mux_pad_link),
(gst_ogg_mux_pad_unlink), (gst_ogg_mux_request_new_pad),
(gst_ogg_mux_handle_src_event), (gst_ogg_mux_next_buffer),
(gst_ogg_mux_push_page), (gst_ogg_mux_compare_pads),
(gst_ogg_mux_queue_pads), (gst_ogg_mux_loop),
(gst_ogg_mux_get_property), (gst_ogg_mux_set_property),
(gst_ogg_mux_change_state), (gst_ogg_mux_plugin_init):
Added an ogg muxer.
Small typo fixes in the demuxer.
2004-05-10 Wim Taymans <wim@fluendo.com>
* ext/theora/theoraenc.c: (gst_theora_enc_class_init),

44
ext/ogg/gstogg.c Normal file
View file

@ -0,0 +1,44 @@
/* GStreamer
* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
*
* 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 <gst/gst.h>
extern gboolean gst_ogg_demux_plugin_init (GstPlugin * plugin);
extern gboolean gst_ogg_mux_plugin_init (GstPlugin * plugin);
GST_DEBUG_CATEGORY (vorbisdec_debug);
static gboolean
plugin_init (GstPlugin * plugin)
{
gst_ogg_demux_plugin_init (plugin);
gst_ogg_mux_plugin_init (plugin);
return TRUE;
}
GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
GST_VERSION_MINOR,
"ogg",
"ogg stream manipulation (info about ogg: http://xiph.org)",
plugin_init, VERSION, GST_LICENSE, GST_PACKAGE, GST_ORIGIN)

21
ext/ogg/gstoggdemux.c
View file

@ -25,7 +25,7 @@
#include <gst/gst.h>
#include <ogg/ogg.h>
/* memcpy - if someone knows a way to get rid of it, please speak up
* note: the ogg docs even say you ned this... */
* note: the ogg docs even say you need this... */
#include <string.h>
GST_DEBUG_CATEGORY_STATIC (gst_ogg_demux_debug);
@ -376,7 +376,8 @@ gst_ogg_demux_src_event (GstPad * pad, GstEvent * event)
GST_OGG_SET_STATE (ogg, GST_OGG_STATE_SEEK);
FOR_PAD_IN_CURRENT_CHAIN (ogg, pad,
pad->flags |= GST_OGG_PAD_NEEDS_DISCONT;);
pad->flags |= GST_OGG_PAD_NEEDS_DISCONT;
);
GST_DEBUG_OBJECT (ogg, "initiating seeking to offset %" G_GUINT64_FORMAT,
offset);
ogg->seek_pad = cur;
@ -423,7 +424,8 @@ gst_ogg_demux_handle_event (GstPad * pad, GstEvent * event)
gst_event_unref (event);
GST_FLAG_UNSET (ogg, GST_OGG_FLAG_WAIT_FOR_DISCONT);
FOR_PAD_IN_CURRENT_CHAIN (ogg, pad,
pad->flags |= GST_OGG_PAD_NEEDS_DISCONT;);
pad->flags |= GST_OGG_PAD_NEEDS_DISCONT;
);
break;
case GST_EVENT_EOS:
if (ogg->state == GST_OGG_STATE_SETUP) {
@ -959,8 +961,8 @@ gst_ogg_type_find (ogg_packet * packet)
return NULL;
}
static gboolean
plugin_init (GstPlugin * plugin)
gboolean
gst_ogg_demux_plugin_init (GstPlugin * plugin)
{
GST_DEBUG_CATEGORY_INIT (gst_ogg_demux_debug, "oggdemux", 0, "ogg demuxer");
@ -968,14 +970,9 @@ plugin_init (GstPlugin * plugin)
GST_TYPE_OGG_DEMUX);
}
GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
GST_VERSION_MINOR,
"ogg",
"ogg stream manipulation (info about ogg: http://xiph.org)",
plugin_init, VERSION, GST_LICENSE, GST_PACKAGE, GST_ORIGIN)
/* prints all info about the element */
static void gst_ogg_print (GstOggDemux * ogg)
static void
gst_ogg_print (GstOggDemux * ogg)
{
guint i;
GSList *walk;

678
ext/ogg/gstoggmux.c Normal file
View file

@ -0,0 +1,678 @@
/* OGG muxer plugin for GStreamer
* Copyright (C) 2004 Wim Taymans <wim@fluendo.com>
*
* 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 <gst/gst.h>
#include <ogg/ogg.h>
/* memcpy - if someone knows a way to get rid of it, please speak up
* note: the ogg docs even say you need this... */
#include <string.h>
#include <time.h>
GST_DEBUG_CATEGORY_STATIC (gst_ogg_mux_debug);
#define GST_CAT_DEFAULT gst_ogg_mux_debug
#define GST_TYPE_OGG_MUX (gst_ogg_mux_get_type())
#define GST_OGG_MUX(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_OGG_MUX, GstOggMux))
#define GST_OGG_MUX_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_OGG_MUX, GstOggMux))
#define GST_IS_OGG_MUX(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_OGG_MUX))
#define GST_IS_OGG_MUX_CLASS(obj) (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_OGG_MUX))
typedef struct _GstOggMux GstOggMux;
typedef struct _GstOggMuxClass GstOggMuxClass;
/* all information needed for one ogg stream */
typedef struct
{
GstPad *pad; /* reference for this pad is held by element we belong to */
GstBuffer *buffer; /* the queued buffer for this pad */
gint serial;
ogg_stream_state stream;
gint64 packetno; /* number of next packet */
gint64 pageno; /* number of next page */
gboolean eos;
guint state; /* state of the pad */
}
GstOggPad;
typedef enum
{
GST_OGG_PAD_STATE_CONTROL = 0,
GST_OGG_PAD_STATE_DATA = 1
}
GstOggPadState;
struct _GstOggMux
{
GstElement element;
/* pad */
GstPad *srcpad;
/* sinkpads, a GSList of GstOggPads */
GSList *sinkpads;
/* the pad we are currently pulling from to fill a page */
GstOggPad *pulling;
/* next timestamp for the page */
GstClockTime next_ts;
/* offset in stream */
guint64 offset;
};
typedef enum
{
GST_OGG_FLAG_BOS = GST_ELEMENT_FLAG_LAST,
GST_OGG_FLAG_EOS
}
GstOggFlag;
struct _GstOggMuxClass
{
GstElementClass parent_class;
};
/* elementfactory information */
static GstElementDetails gst_ogg_mux_details = GST_ELEMENT_DETAILS ("ogg muxer",
"Codec/Muxer",
"mux ogg streams (info about ogg: http://xiph.org)",
"Wim Taymans <wim@fluendo.com>");
/* OggMux signals and args */
enum
{
/* FILL ME */
LAST_SIGNAL
};
enum
{
ARG_0,
};
static GstStaticPadTemplate src_factory = GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("application/ogg")
);
static GstStaticPadTemplate sink_factory = GST_STATIC_PAD_TEMPLATE ("sink_%d",
GST_PAD_SINK,
GST_PAD_REQUEST,
GST_STATIC_CAPS_ANY /* we can take anything, really */
);
static void gst_ogg_mux_base_init (gpointer g_class);
static void gst_ogg_mux_class_init (GstOggMuxClass * klass);
static void gst_ogg_mux_init (GstOggMux * ogg_mux);
static void gst_ogg_mux_loop (GstElement * element);
static gboolean gst_ogg_mux_handle_src_event (GstPad * pad, GstEvent * event);
static GstPad *gst_ogg_mux_request_new_pad (GstElement * element,
GstPadTemplate * templ, const gchar * name);
static void gst_ogg_mux_set_property (GObject * object,
guint prop_id, const GValue * value, GParamSpec * pspec);
static void gst_ogg_mux_get_property (GObject * object,
guint prop_id, GValue * value, GParamSpec * pspec);
static GstElementStateReturn gst_ogg_mux_change_state (GstElement * element);
static GstElementClass *parent_class = NULL;
/*static guint gst_ogg_mux_signals[LAST_SIGNAL] = { 0 }; */
GType
gst_ogg_mux_get_type (void)
{
static GType ogg_mux_type = 0;
if (!ogg_mux_type) {
static const GTypeInfo ogg_mux_info = {
sizeof (GstOggMuxClass),
gst_ogg_mux_base_init,
NULL,
(GClassInitFunc) gst_ogg_mux_class_init,
NULL,
NULL,
sizeof (GstOggMux),
0,
(GInstanceInitFunc) gst_ogg_mux_init,
};
ogg_mux_type =
g_type_register_static (GST_TYPE_ELEMENT, "GstOggMux", &ogg_mux_info,
0);
}
return ogg_mux_type;
}
static void
gst_ogg_mux_base_init (gpointer g_class)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&src_factory));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&sink_factory));
gst_element_class_set_details (element_class, &gst_ogg_mux_details);
}
static void
gst_ogg_mux_class_init (GstOggMuxClass * klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
gobject_class = (GObjectClass *) klass;
gstelement_class = (GstElementClass *) klass;
parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
gstelement_class->request_new_pad = gst_ogg_mux_request_new_pad;
gstelement_class->change_state = gst_ogg_mux_change_state;
gstelement_class->get_property = gst_ogg_mux_get_property;
gstelement_class->set_property = gst_ogg_mux_set_property;
}
static const GstEventMask *
gst_ogg_mux_get_sink_event_masks (GstPad * pad)
{
static const GstEventMask gst_ogg_mux_sink_event_masks[] = {
{GST_EVENT_EOS, 0},
{0,}
};
return gst_ogg_mux_sink_event_masks;
}
static void
gst_ogg_mux_init (GstOggMux * ogg_mux)
{
GstElementClass *klass = GST_ELEMENT_GET_CLASS (ogg_mux);
ogg_mux->srcpad =
gst_pad_new_from_template (gst_element_class_get_pad_template (klass,
"src"), "src");
gst_pad_set_event_function (ogg_mux->srcpad, gst_ogg_mux_handle_src_event);
gst_element_add_pad (GST_ELEMENT (ogg_mux), ogg_mux->srcpad);
GST_FLAG_SET (GST_ELEMENT (ogg_mux), GST_ELEMENT_EVENT_AWARE);
GST_FLAG_SET (GST_ELEMENT (ogg_mux), GST_OGG_FLAG_BOS);
/* seed random number generator for creation of serial numbers */
srand (time (NULL));
ogg_mux->sinkpads = NULL;
ogg_mux->pulling = NULL;
gst_element_set_loop_function (GST_ELEMENT (ogg_mux), gst_ogg_mux_loop);
}
static GstPadLinkReturn
gst_ogg_mux_sinkconnect (GstPad * pad, const GstCaps * vscaps)
{
GstOggMux *ogg_mux;
GstStructure *structure;
const gchar *mimetype;
ogg_mux = GST_OGG_MUX (gst_pad_get_parent (pad));
GST_DEBUG ("ogg_mux: sinkconnect triggered on %s", gst_pad_get_name (pad));
structure = gst_caps_get_structure (vscaps, 0);
mimetype = gst_structure_get_name (structure);
return GST_PAD_LINK_OK;
}
static void
gst_ogg_mux_pad_link (GstPad * pad, GstPad * peer, gpointer data)
{
//GstOggMux *ogg_mux = GST_OGG_MUX (data);
const gchar *padname = gst_pad_get_name (pad);
GST_DEBUG ("pad '%s' connected", padname);
}
static void
gst_ogg_mux_pad_unlink (GstPad * pad, GstPad * peer, gpointer data)
{
//GstOggMux *ogg_mux = GST_OGG_MUX (data);
const gchar *padname = gst_pad_get_name (pad);
GST_DEBUG ("pad '%s' unlinked", padname);
}
static GstPad *
gst_ogg_mux_request_new_pad (GstElement * element,
GstPadTemplate * templ, const gchar * req_name)
{
GstOggMux *ogg_mux;
GstPad *newpad;
GstElementClass *klass = GST_ELEMENT_GET_CLASS (element);
g_return_val_if_fail (templ != NULL, NULL);
if (templ->direction != GST_PAD_SINK) {
g_warning ("ogg_mux: request pad that is not a SINK pad\n");
return NULL;
}
g_return_val_if_fail (GST_IS_OGG_MUX (element), NULL);
ogg_mux = GST_OGG_MUX (element);
if (templ == gst_element_class_get_pad_template (klass, "sink_%d")) {
gint serial;
gchar *name;
if (req_name == NULL || strlen (req_name) < 6) {
/* no name given when requesting the pad, use random serial number */
serial = rand ();
} else {
/* parse serial number from requested padname */
serial = atoi (&req_name[5]);
}
/* create new pad with the name */
name = g_strdup_printf ("sink_%d", serial);
newpad = gst_pad_new_from_template (templ, name);
g_free (name);
/* construct our own wrapper data structure for the pad to
* keep track of its status */
{
GstOggPad *oggpad = g_new0 (GstOggPad, 1);
oggpad->pad = newpad;
oggpad->serial = serial;
ogg_stream_init (&oggpad->stream, serial);
oggpad->packetno = 0;
oggpad->pageno = 0;
oggpad->eos = FALSE;
/* we assume there will be some control data first for this pad */
oggpad->state = GST_OGG_PAD_STATE_CONTROL;
/* save a pointer to our data in the pad */
gst_pad_set_element_private (newpad, oggpad);
/* store our data for the pad */
ogg_mux->sinkpads = g_slist_prepend (ogg_mux->sinkpads, oggpad);
}
} else {
g_warning ("ogg_mux: this is not our template!\n");
return NULL;
}
g_signal_connect (newpad, "linked",
G_CALLBACK (gst_ogg_mux_pad_link), (gpointer) ogg_mux);
g_signal_connect (newpad, "unlinked",
G_CALLBACK (gst_ogg_mux_pad_unlink), (gpointer) ogg_mux);
/* setup some pad functions */
gst_pad_set_link_function (newpad, gst_ogg_mux_sinkconnect);
gst_pad_set_event_mask_function (newpad, gst_ogg_mux_get_sink_event_masks);
/* dd the pad to the element */
gst_element_add_pad (element, newpad);
return newpad;
}
/* handle events */
static gboolean
gst_ogg_mux_handle_src_event (GstPad * pad, GstEvent * event)
{
GstOggMux *ogg_mux;
GstEventType type;
ogg_mux = GST_OGG_MUX (gst_pad_get_parent (pad));
type = event ? GST_EVENT_TYPE (event) : GST_EVENT_UNKNOWN;
switch (type) {
case GST_EVENT_SEEK:
/* disable seeking for now */
return FALSE;
default:
break;
}
return gst_pad_event_default (pad, event);
}
static GstBuffer *
gst_ogg_mux_next_buffer (GstOggPad * pad)
{
GstData *data = NULL;
while (data == NULL) {
GST_LOG ("muxer: pulling %s:%s\n", GST_DEBUG_PAD_NAME (pad->pad));
data = gst_pad_pull (pad->pad);
/* if it's an event, handle it */
if (GST_IS_EVENT (data)) {
GstEventType type;
GstOggMux *ogg_mux;
GstEvent *event = GST_EVENT (data);
ogg_mux = GST_OGG_MUX (gst_pad_get_parent (pad->pad));
type = event ? GST_EVENT_TYPE (event) : GST_EVENT_UNKNOWN;
switch (type) {
case GST_EVENT_EOS:
return NULL;
default:
gst_pad_event_default (pad->pad, event);
break;
}
data = NULL;
}
}
return GST_BUFFER (data);
}
static void
gst_ogg_mux_push_page (GstOggMux * mux, ogg_page * page)
{
GstBuffer *buffer;
/* allocate space for header and body */
buffer = gst_pad_alloc_buffer (mux->srcpad, GST_BUFFER_OFFSET_NONE,
page->header_len + page->body_len);
memcpy (GST_BUFFER_DATA (buffer), page->header, page->header_len);
memcpy (GST_BUFFER_DATA (buffer) + page->header_len,
page->body, page->body_len);
/* next_ts was the timestamp of the first buffer put in this page */
GST_BUFFER_TIMESTAMP (buffer) = mux->next_ts;
GST_BUFFER_OFFSET (buffer) = mux->offset;
mux->offset += GST_BUFFER_SIZE (buffer);
GST_BUFFER_OFFSET_END (buffer) = mux->offset;
if (GST_PAD_IS_USABLE (mux->srcpad))
gst_pad_push (mux->srcpad, GST_DATA (buffer));
else
gst_buffer_unref (buffer);
}
/*
* Given two pads, compare the buffers queued on it and return 0 if they have
* an equal priority, 1 if the new pad is better, -1 if the old pad is better
*/
static gint
gst_ogg_mux_compare_pads (GstOggMux * ogg_mux, GstOggPad * old, GstOggPad * new)
{
guint64 oldtime, newtime;
/* if the old pad doesn't contain anything or is even NULL, return
* the new pad as best candidate and vice versa */
if (old == NULL || old->buffer == NULL)
return 1;
if (new == NULL || new->buffer == NULL)
return -1;
/* no timestamp on old buffer, it must go first */
oldtime = GST_BUFFER_TIMESTAMP (old->buffer);
if (oldtime == GST_CLOCK_TIME_NONE)
return -1;
/* no timestamp on new buffer, it must go first */
newtime = GST_BUFFER_TIMESTAMP (new->buffer);
if (newtime == GST_CLOCK_TIME_NONE)
return 1;
/* old buffer has higher timestamp, new one should go first */
if (newtime < oldtime)
return 1;
/* new buffer has higher timestamp, old one should go first */
else if (newtime > oldtime)
return -1;
else {
/* buffers with equal timestamps, prefer the pad that has the
* least number of pages muxed */
if (new->pageno < old->pageno)
return 1;
else if (new->pageno > old->pageno)
return -1;
}
/* same priority if all of the above failed */
return 0;
}
/* make sure a buffer is queued on all pads, returns a pointer to an oggpad
* that holds the best buffer or NULL when no pad was usable */
static GstOggPad *
gst_ogg_mux_queue_pads (GstOggMux * ogg_mux)
{
GstOggPad *bestpad = NULL;
GSList *walk;
/* try to make sure we have a buffer from each usable pad first */
walk = ogg_mux->sinkpads;
while (walk) {
GstOggPad *pad = (GstOggPad *) walk->data;
walk = walk->next;
/* try to get a new buffer for this pad if needed and possible */
if (pad->buffer == NULL && GST_PAD_IS_USABLE (pad->pad)) {
pad->buffer = gst_ogg_mux_next_buffer (pad);
/* no next buffer, try another pad */
if (pad->buffer == NULL)
continue;
}
/* skip unusable pads */
if (!GST_PAD_IS_USABLE (pad->pad))
continue;
/* we should have a buffer now, see if it is the best pad to
* pull on */
if (pad->buffer != NULL) {
if (gst_ogg_mux_compare_pads (ogg_mux, bestpad, pad) > 0) {
bestpad = pad;
}
}
}
return bestpad;
}
/* basic idea:
*
* 1) find a pad to pull on, this is done by pulling on all pads and
* looking at the buffers to decide which one should be muxed first.
* 2) store the selected pad and keep on pulling until we fill a
* complete ogg page. This is needed because the ogg spec says that
* you should fill a complete page with data from the same logical
* stream. When the page is filled, go back to 1).
* 3) before filling a packet, read ahead one more buffer to see if this
* packet is the last of the stream.
*/
static void
gst_ogg_mux_loop (GstElement * element)
{
GstOggMux *ogg_mux;
ogg_mux = GST_OGG_MUX (element);
/* if we don't know which pad to pull on, find one */
if (ogg_mux->pulling == NULL) {
ogg_mux->pulling = gst_ogg_mux_queue_pads (ogg_mux);
/* remember timestamp of first buffer for this new pad */
if (ogg_mux->pulling != NULL) {
ogg_mux->next_ts = GST_BUFFER_TIMESTAMP (ogg_mux->pulling->buffer);
} else {
/* no pad to pull on, send EOS */
if (GST_PAD_IS_USABLE (ogg_mux->srcpad))
gst_pad_push (ogg_mux->srcpad,
GST_DATA (gst_event_new (GST_EVENT_EOS)));
gst_element_set_eos (element);
return;
}
}
/* we are pulling from a pad, continue to do so until a page
* has been filled and pushed */
if (ogg_mux->pulling != NULL) {
ogg_packet packet;
ogg_page page;
GstBuffer *buf, *tmpbuf;
GstOggPad *pad = ogg_mux->pulling;
gint ret;
GstOggPadState newstate;
/* now see if we have a buffer */
buf = pad->buffer;
if (buf == NULL) {
/* no buffer, get one */
buf = gst_ogg_mux_next_buffer (pad);
/* data exhausted on this pad (EOS) */
if (buf == NULL) {
/* stop pulling from the pad */
ogg_mux->pulling = NULL;
return;
}
}
/* ogg expects headers and data to be in a different page, we
* have no way of knowing headers from data here so we use the
* buffer control flag as a hint */
newstate = (pad->packetno < 3 ?
GST_OGG_PAD_STATE_CONTROL : GST_OGG_PAD_STATE_DATA);
if (newstate != pad->state) {
/* state switch, flush page */
while (ogg_stream_flush (&pad->stream, &page)) {
gst_ogg_mux_push_page (ogg_mux, &page);
pad->pageno++;
}
/* switching state */
pad->state = newstate;
}
/* create a packet from the buffer */
packet.packet = GST_BUFFER_DATA (buf);
packet.bytes = GST_BUFFER_SIZE (buf);
packet.granulepos = GST_BUFFER_OFFSET_END (buf);
/* mark BOS and packet number */
packet.b_o_s = (pad->packetno == 0);
packet.packetno = pad->packetno++;
/* read ahead one more buffer to find EOS */
tmpbuf = gst_ogg_mux_next_buffer (pad);
/* data exhausted on this pad */
if (tmpbuf == NULL) {
/* stop pulling from the pad */
ogg_mux->pulling = NULL;
}
/* mark EOS */
packet.e_o_s = (tmpbuf == NULL ? 1 : 0);
/* swap the packet in */
ogg_stream_packetin (&pad->stream, &packet);
/* don't need the old buffer anymore */
gst_buffer_unref (pad->buffer);
/* store new readahead buffer */
pad->buffer = tmpbuf;
/* create a page */
ret = ogg_stream_pageout (&pad->stream, &page);
if (ret > 0) {
/* we have a complete page now, we can push the page
* and make sure to pull on a new pad the next time around */
gst_ogg_mux_push_page (ogg_mux, &page);
/* increment the page number counter */
pad->pageno++;
/* we're done pulling on this pad, make sure to choose a new
* pad for pulling in the next iteration */
ogg_mux->pulling = NULL;
}
}
}
static void
gst_ogg_mux_get_property (GObject * object,
guint prop_id, GValue * value, GParamSpec * pspec)
{
switch (prop_id) {
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_ogg_mux_set_property (GObject * object,
guint prop_id, const GValue * value, GParamSpec * pspec)
{
switch (prop_id) {
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static GstElementStateReturn
gst_ogg_mux_change_state (GstElement * element)
{
GstOggMux *ogg_mux;
gint transition = GST_STATE_TRANSITION (element);
g_return_val_if_fail (GST_IS_OGG_MUX (element), GST_STATE_FAILURE);
ogg_mux = GST_OGG_MUX (element);
switch (transition) {
case GST_STATE_NULL_TO_READY:
case GST_STATE_READY_TO_PAUSED:
ogg_mux->next_ts = 0;
ogg_mux->offset = 0;
ogg_mux->pulling = NULL;
break;
case GST_STATE_PAUSED_TO_PLAYING:
case GST_STATE_PLAYING_TO_PAUSED:
case GST_STATE_PAUSED_TO_READY:
case GST_STATE_READY_TO_NULL:
break;
}
if (GST_ELEMENT_CLASS (parent_class)->change_state)
return GST_ELEMENT_CLASS (parent_class)->change_state (element);
return GST_STATE_SUCCESS;
}
gboolean
gst_ogg_mux_plugin_init (GstPlugin * plugin)
{
GST_DEBUG_CATEGORY_INIT (gst_ogg_mux_debug, "oggmux", 0, "ogg muxer");
return gst_element_register (plugin, "oggmux", GST_RANK_PRIMARY,
GST_TYPE_OGG_MUX);
}