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gstreamer/ext/ogg/gstoggdemux.c
Wim Taymans 1ed9de2f68 ext/ogg/gstoggdemux.c: Add some more debug info. 
Original commit message from CVS:
* ext/ogg/gstoggdemux.c: (gst_ogg_demux_submit_buffer),
(gst_ogg_demux_get_next_page), (gst_ogg_demux_perform_seek),
(gst_ogg_demux_read_chain), (gst_ogg_demux_loop):
Add some more debug info.
Don't crash when a seek failed.
Actually return the result of the seek instead of TRUE.
Ignore multiple BOS pages with the same serial so that we don't create
the same stream multiple times.
Post an error when we fail to do the initial seek.
2006-08-14 10:49:10 +00:00

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/* GStreamer
* Copyright (C) 2004 Wim Taymans <wim@fluendo.com>
*
* gstoggdemux.c: ogg stream demuxer
*
* 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>
#include <string.h>
#include <gst/gst-i18n-plugin.h>
#include <gst/base/gsttypefindhelper.h>
static const GstElementDetails gst_ogg_demux_details =
GST_ELEMENT_DETAILS ("Ogg demuxer",
"Codec/Demuxer",
"demux ogg streams (info about ogg: http://xiph.org)",
"Wim Taymand <wim@fluendo.com>");
#define CHUNKSIZE (8500) /* this is out of vorbisfile */
#define SKELETON_FISHEAD_SIZE 64
#define SKELETON_FISBONE_MIN_SIZE 52
enum
{
OV_EREAD = -1,
OV_EFAULT = -2,
OV_FALSE = -3,
OV_EOF = -4,
};
GST_DEBUG_CATEGORY_STATIC (gst_ogg_demux_debug);
GST_DEBUG_CATEGORY_STATIC (gst_ogg_demux_setup_debug);
#define GST_CAT_DEFAULT gst_ogg_demux_debug
#define GST_TYPE_OGG_PAD (gst_ogg_pad_get_type())
#define GST_OGG_PAD(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_OGG_PAD, GstOggPad))
#define GST_OGG_PAD_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_OGG_PAD, GstOggPad))
#define GST_IS_OGG_PAD(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_OGG_PAD))
#define GST_IS_OGG_PAD_CLASS(obj) (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_OGG_PAD))
typedef struct _GstOggPad GstOggPad;
typedef struct _GstOggPadClass GstOggPadClass;
#define GST_TYPE_OGG_DEMUX (gst_ogg_demux_get_type())
#define GST_OGG_DEMUX(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_OGG_DEMUX, GstOggDemux))
#define GST_OGG_DEMUX_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_OGG_DEMUX, GstOggDemux))
#define GST_IS_OGG_DEMUX(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_OGG_DEMUX))
#define GST_IS_OGG_DEMUX_CLASS(obj) (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_OGG_DEMUX))
static GType gst_ogg_demux_get_type (void);
typedef struct _GstOggDemux GstOggDemux;
typedef struct _GstOggDemuxClass GstOggDemuxClass;
/* all information needed for one ogg chain (relevant for chained bitstreams) */
typedef struct _GstOggChain
{
GstOggDemux *ogg;
gint64 offset; /* starting offset of chain */
gint64 end_offset; /* end offset of chain */
gint64 bytes; /* number of bytes */
gboolean have_bos;
GArray *streams;
GstClockTime total_time; /* the total time of this chain, this is the MAX of
the totals of all streams */
GstClockTime begin_time; /* when this chain starts in the stream */
GstClockTime segment_start; /* the timestamp of the first sample, this is the MIN of
the start times of all streams. */
GstClockTime segment_stop; /* the timestamp of the last page, this is the MAX of the
streams. */
} GstOggChain;
/* different modes for the pad */
typedef enum
{
GST_OGG_PAD_MODE_INIT, /* we are feeding our internal decoder to get info */
GST_OGG_PAD_MODE_STREAMING, /* we are streaming buffers to the outside */
} GstOggPadMode;
#define PARENT GstPad
#define PARENTCLASS GstPadClass
/* all information needed for one ogg stream */
struct _GstOggPad
{
PARENT pad; /* subclass GstPad */
gboolean have_type;
GstOggPadMode mode;
GstPad *elem_pad; /* sinkpad of internal element */
GstElement *element; /* internal element */
GstPad *elem_out; /* our sinkpad to receive buffers form the internal element */
GstOggChain *chain; /* the chain we are part of */
GstOggDemux *ogg; /* the ogg demuxer we are part of */
GList *headers;
gboolean is_skeleton;
gboolean have_fisbone;
gint64 granulerate_n;
gint64 granulerate_d;
guint32 preroll;
guint granuleshift;
gint serialno;
gint64 packetno;
gint64 current_granule;
GstClockTime start_time; /* the timestamp of the first sample */
gint64 first_granule; /* the granulepos of first page == first sample in next page */
GstClockTime first_time; /* the timestamp of the second page or granuletime of first page */
ogg_stream_state stream;
gboolean discont;
GstFlowReturn last_ret; /* last return of _pad_push() */
gboolean dynamic; /* True if the internal element had dynamic pads */
guint padaddedid; /* The signal id for element::pad-added */
};
struct _GstOggPadClass
{
PARENTCLASS parent_class;
};
#define GST_CHAIN_LOCK(ogg) g_mutex_lock((ogg)->chain_lock)
#define GST_CHAIN_UNLOCK(ogg) g_mutex_unlock((ogg)->chain_lock)
struct _GstOggDemux
{
GstElement element;
GstPad *sinkpad;
gint64 length;
gint64 offset;
gboolean seekable;
gboolean running;
gboolean need_chains;
/* state */
GMutex *chain_lock; /* we need the lock to protect the chains */
GArray *chains; /* list of chains we know */
GstClockTime total_time;
GstFlowReturn chain_error; /* error we received while finding chains */
GstOggChain *current_chain;
GstOggChain *building_chain;
/* playback start/stop positions */
GstSegment segment;
gboolean segment_running;
GstEvent *event;
gint64 current_granule;
/* annodex stuff */
gboolean have_fishead;
gint64 basetime;
/* ogg stuff */
ogg_sync_state sync;
};
struct _GstOggDemuxClass
{
GstElementClass parent_class;
};
static GstStaticPadTemplate internaltemplate =
GST_STATIC_PAD_TEMPLATE ("internal",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS_ANY);
static gboolean gst_ogg_demux_collect_chain_info (GstOggDemux * ogg,
GstOggChain * chain);
static gboolean gst_ogg_demux_activate_chain (GstOggDemux * ogg,
GstOggChain * chain, GstEvent * event);
static gboolean gst_ogg_demux_perform_seek (GstOggDemux * ogg,
GstEvent * event);
static gboolean gst_ogg_demux_receive_event (GstElement * element,
GstEvent * event);
static void gst_ogg_pad_class_init (GstOggPadClass * klass);
static void gst_ogg_pad_init (GstOggPad * pad);
static void gst_ogg_pad_dispose (GObject * object);
static void gst_ogg_pad_finalize (GObject * object);
#if 0
static const GstFormat *gst_ogg_pad_formats (GstPad * pad);
static const GstEventMask *gst_ogg_pad_event_masks (GstPad * pad);
#endif
static const GstQueryType *gst_ogg_pad_query_types (GstPad * pad);
static gboolean gst_ogg_pad_src_query (GstPad * pad, GstQuery * query);
static gboolean gst_ogg_pad_event (GstPad * pad, GstEvent * event);
static GstCaps *gst_ogg_pad_getcaps (GstPad * pad);
static GstOggPad *gst_ogg_chain_get_stream (GstOggChain * chain,
glong serialno);
static gboolean gst_ogg_pad_query_convert (GstOggPad * pad,
GstFormat src_format, gint64 src_val,
GstFormat * dest_format, gint64 * dest_val);
static GstClockTime gst_annodex_granule_to_time (gint64 granulepos,
gint64 granulerate_n, gint64 granulerate_d, guint8 granuleshift);
static GstFlowReturn gst_ogg_demux_combine_flows (GstOggDemux * ogg,
GstOggPad * pad, GstFlowReturn ret);
static GstPadClass *ogg_pad_parent_class = NULL;
static GType
gst_ogg_pad_get_type (void)
{
static GType ogg_pad_type = 0;
if (!ogg_pad_type) {
static const GTypeInfo ogg_pad_info = {
sizeof (GstOggPadClass),
NULL,
NULL,
(GClassInitFunc) gst_ogg_pad_class_init,
NULL,
NULL,
sizeof (GstOggPad),
0,
(GInstanceInitFunc) gst_ogg_pad_init,
};
ogg_pad_type =
g_type_register_static (GST_TYPE_PAD, "GstOggPad", &ogg_pad_info, 0);
}
return ogg_pad_type;
}
static void
gst_ogg_pad_class_init (GstOggPadClass * klass)
{
GObjectClass *gobject_class;
gobject_class = (GObjectClass *) klass;
ogg_pad_parent_class = g_type_class_peek_parent (klass);
gobject_class->dispose = gst_ogg_pad_dispose;
gobject_class->finalize = gst_ogg_pad_finalize;
}
static void
gst_ogg_pad_init (GstOggPad * pad)
{
gst_pad_set_event_function (GST_PAD (pad),
GST_DEBUG_FUNCPTR (gst_ogg_pad_event));
gst_pad_set_getcaps_function (GST_PAD (pad),
GST_DEBUG_FUNCPTR (gst_ogg_pad_getcaps));
gst_pad_set_query_type_function (GST_PAD (pad),
GST_DEBUG_FUNCPTR (gst_ogg_pad_query_types));
gst_pad_set_query_function (GST_PAD (pad),
GST_DEBUG_FUNCPTR (gst_ogg_pad_src_query));
pad->mode = GST_OGG_PAD_MODE_INIT;
pad->first_granule = -1;
pad->current_granule = -1;
pad->start_time = GST_CLOCK_TIME_NONE;
pad->first_time = GST_CLOCK_TIME_NONE;
pad->have_type = FALSE;
pad->headers = NULL;
}
static void
gst_ogg_pad_dispose (GObject * object)
{
GstOggPad *pad = GST_OGG_PAD (object);
GstPad **elem_pad_p;
GstElement **element_p;
GstPad **elem_out_p;
if (pad->element)
gst_element_set_state (pad->element, GST_STATE_NULL);
elem_pad_p = &pad->elem_pad;
element_p = &pad->element;
elem_out_p = &pad->elem_out;
gst_object_replace ((GstObject **) elem_pad_p, NULL);
gst_object_replace ((GstObject **) element_p, NULL);
gst_object_replace ((GstObject **) elem_out_p, NULL);
pad->chain = NULL;
pad->ogg = NULL;
g_list_foreach (pad->headers, (GFunc) gst_mini_object_unref, NULL);
g_list_free (pad->headers);
pad->headers = NULL;
ogg_stream_reset (&pad->stream);
G_OBJECT_CLASS (ogg_pad_parent_class)->dispose (object);
}
static void
gst_ogg_pad_finalize (GObject * object)
{
GstOggPad *pad = GST_OGG_PAD (object);
ogg_stream_clear (&pad->stream);
G_OBJECT_CLASS (ogg_pad_parent_class)->finalize (object);
}
#if 0
static const GstFormat *
gst_ogg_pad_formats (GstPad * pad)
{
static GstFormat src_formats[] = {
GST_FORMAT_DEFAULT, /* time */
GST_FORMAT_TIME, /* granulepos */
0
};
static GstFormat sink_formats[] = {
GST_FORMAT_BYTES,
GST_FORMAT_DEFAULT, /* bytes */
0
};
return (GST_PAD_IS_SRC (pad) ? src_formats : sink_formats);
}
#endif
#if 0
static const GstEventMask *
gst_ogg_pad_event_masks (GstPad * pad)
{
static const GstEventMask src_event_masks[] = {
{GST_EVENT_SEEK, GST_SEEK_METHOD_SET | GST_SEEK_FLAG_FLUSH},
{0,}
};
return src_event_masks;
}
#endif
static const GstQueryType *
gst_ogg_pad_query_types (GstPad * pad)
{
static const GstQueryType query_types[] = {
GST_QUERY_DURATION,
0
};
return query_types;
}
static GstCaps *
gst_ogg_pad_getcaps (GstPad * pad)
{
return gst_caps_ref (GST_PAD_CAPS (pad));
}
static gboolean
gst_ogg_pad_src_query (GstPad * pad, GstQuery * query)
{
gboolean res = TRUE;
GstOggDemux *ogg;
GstOggPad *cur;
ogg = GST_OGG_DEMUX (gst_pad_get_parent (pad));
cur = GST_OGG_PAD (pad);
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_DURATION:
{
GstFormat format;
gst_query_parse_duration (query, &format, NULL);
/* can only get position in time */
if (format != GST_FORMAT_TIME)
goto wrong_format;
/* can only return the total time position */
/* FIXME, return time for this specific stream */
gst_query_set_duration (query, GST_FORMAT_TIME, ogg->total_time);
break;
}
case GST_QUERY_SEEKING:
{
GstFormat format;
gst_query_parse_seeking (query, &format, NULL, NULL, NULL);
if (format == GST_FORMAT_TIME) {
gst_query_set_seeking (query, GST_FORMAT_TIME, ogg->seekable,
0, ogg->total_time);
} else {
res = FALSE;
}
break;
}
default:
res = gst_pad_query_default (pad, query);
break;
}
done:
gst_object_unref (ogg);
return res;
/* ERRORS */
wrong_format:
{
GST_DEBUG_OBJECT (ogg, "only query duration on TIME is supported");
res = FALSE;
goto done;
}
}
static gboolean
gst_ogg_demux_receive_event (GstElement * element, GstEvent * event)
{
gboolean res;
GstOggDemux *ogg;
ogg = GST_OGG_DEMUX (element);
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_SEEK:
/* can't seek if we are not seekable, FIXME could pass the
* seek query upstream after converting it to bytes using
* the average bitrate of the stream. */
if (!ogg->seekable) {
GST_DEBUG_OBJECT (ogg, "seek on non seekable stream");
goto error;
}
/* now do the seek */
res = gst_ogg_demux_perform_seek (ogg, event);
gst_event_unref (event);
break;
default:
GST_DEBUG_OBJECT (ogg, "We only handle seek events here");
goto error;
}
return res;
/* ERRORS */
error:
{
GST_DEBUG_OBJECT (ogg, "error handling event");
gst_event_unref (event);
return FALSE;
}
}
static gboolean
gst_ogg_pad_event (GstPad * pad, GstEvent * event)
{
gboolean res;
GstOggDemux *ogg;
GstOggPad *cur;
ogg = GST_OGG_DEMUX (gst_pad_get_parent (pad));
cur = GST_OGG_PAD (pad);
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_SEEK:
/* can't seek if we are not seekable, FIXME could pass the
* seek query upstream after converting it to bytes using
* the average bitrate of the stream. */
if (!ogg->seekable) {
GST_DEBUG_OBJECT (ogg, "seek on non seekable stream");
goto error;
}
/* now do the seek */
res = gst_ogg_demux_perform_seek (ogg, event);
gst_event_unref (event);
break;
default:
res = gst_pad_event_default (pad, event);
break;
}
done:
gst_object_unref (ogg);
return res;
/* ERRORS */
error:
{
GST_DEBUG_OBJECT (ogg, "error handling event");
gst_event_unref (event);
res = FALSE;
goto done;
}
}
static void
gst_ogg_pad_reset (GstOggPad * pad)
{
ogg_stream_reset (&pad->stream);
/* FIXME: need a discont here */
}
/* the filter function for selecting the elements we can use in
* autoplugging */
static gboolean
gst_ogg_demux_factory_filter (GstPluginFeature * feature, GstCaps * caps)
{
guint rank;
const gchar *klass;
/* we only care about element factories */
if (!GST_IS_ELEMENT_FACTORY (feature))
return FALSE;
klass = gst_element_factory_get_klass (GST_ELEMENT_FACTORY (feature));
/* only demuxers and decoders can play */
if (strstr (klass, "Demux") == NULL &&
strstr (klass, "Decoder") == NULL && strstr (klass, "Parse") == NULL) {
return FALSE;
}
/* only select elements with autoplugging rank */
rank = gst_plugin_feature_get_rank (feature);
if (rank < GST_RANK_MARGINAL)
return FALSE;
GST_DEBUG ("checking factory %s", GST_PLUGIN_FEATURE_NAME (feature));
/* now see if it is compatible with the caps */
{
GstElementFactory *factory = GST_ELEMENT_FACTORY (feature);
const GList *templates;
GList *walk;
/* get the templates from the element factory */
templates = gst_element_factory_get_static_pad_templates (factory);
for (walk = (GList *) templates; walk; walk = g_list_next (walk)) {
GstStaticPadTemplate *templ = walk->data;
/* we only care about the sink templates */
if (templ->direction == GST_PAD_SINK) {
GstCaps *intersect;
GstCaps *scaps;
gboolean empty;
/* try to intersect the caps with the caps of the template */
scaps = gst_static_caps_get (&templ->static_caps);
intersect = gst_caps_intersect (caps, scaps);
gst_caps_unref (scaps);
empty = gst_caps_is_empty (intersect);
gst_caps_unref (intersect);
/* check if the intersection is empty */
if (!empty) {
/* non empty intersection, we can use this element */
goto found;
}
}
}
}
return FALSE;
found:
return TRUE;
}
/* function used to sort element features */
static gint
compare_ranks (GstPluginFeature * f1, GstPluginFeature * f2)
{
gint diff;
diff = gst_plugin_feature_get_rank (f2) - gst_plugin_feature_get_rank (f1);
if (diff != 0)
return diff;
return strcmp (gst_plugin_feature_get_name (f2),
gst_plugin_feature_get_name (f1));
}
/* called when the skeleton fishead is found. Caller ensures the packet is
* precisely the correct size; we don't re-check this here. */
static void
gst_ogg_pad_parse_skeleton_fishead (GstOggPad * pad, ogg_packet * packet)
{
GstOggDemux *ogg = pad->ogg;
guint8 *data = packet->packet;
guint16 major, minor;
gint64 prestime_n, prestime_d;
gint64 basetime_n, basetime_d;
/* skip "fishead\0" */
data += 8;
major = GST_READ_UINT16_LE (data);
data += 2;
minor = GST_READ_UINT16_LE (data);
data += 2;
prestime_n = (gint64) GST_READ_UINT64_LE (data);
data += 8;
prestime_d = (gint64) GST_READ_UINT64_LE (data);
data += 8;
basetime_n = (gint64) GST_READ_UINT64_LE (data);
data += 8;
basetime_d = (gint64) GST_READ_UINT64_LE (data);
data += 8;
ogg->basetime = gst_util_uint64_scale (GST_SECOND, basetime_n, basetime_d);
ogg->have_fishead = TRUE;
pad->is_skeleton = TRUE;
pad->start_time = GST_CLOCK_TIME_NONE;
pad->first_granule = -1;
pad->first_time = GST_CLOCK_TIME_NONE;
GST_INFO_OBJECT (ogg, "skeleton fishead parsed (basetime: %"
GST_TIME_FORMAT ")", GST_TIME_ARGS (ogg->basetime));
}
/* function called when a skeleton fisbone is found. Caller ensures that
* the packet length is sufficient */
static void
gst_ogg_pad_parse_skeleton_fisbone (GstOggPad * pad, ogg_packet * packet)
{
GstOggPad *fisbone_pad;
gint64 start_granule;
guint32 serialno;
guint8 *data = packet->packet;
/* skip "fisbone\0" */
data += 8;
/* skip headers offset */
data += 4;
serialno = GST_READ_UINT32_LE (data);
fisbone_pad = gst_ogg_chain_get_stream (pad->chain, serialno);
if (fisbone_pad) {
if (fisbone_pad->have_fisbone)
/* already parsed */
return;
fisbone_pad->have_fisbone = TRUE;
data += 4;
/* skip number of headers */
data += 4;
fisbone_pad->granulerate_n = GST_READ_UINT64_LE (data);
data += 8;
fisbone_pad->granulerate_d = GST_READ_UINT64_LE (data);
data += 8;
start_granule = GST_READ_UINT64_LE (data);
data += 8;
fisbone_pad->preroll = GST_READ_UINT32_LE (data);
data += 4;
fisbone_pad->granuleshift = GST_READ_UINT8 (data);
data += 1;
/* padding */
data += 3;
fisbone_pad->start_time = gst_annodex_granule_to_time (start_granule,
fisbone_pad->granulerate_n, fisbone_pad->granulerate_d,
fisbone_pad->granuleshift);
GST_INFO_OBJECT (pad->ogg, "skeleton fisbone parsed "
"(serialno: %" G_GUINT32_FORMAT " start time: %" GST_TIME_FORMAT
" granulerate_n: %" G_GINT64_FORMAT " granulerate_d: %" G_GINT64_FORMAT
" preroll: %" G_GUINT32_FORMAT " granuleshift: %d)",
serialno, GST_TIME_ARGS (fisbone_pad->start_time),
fisbone_pad->granulerate_n, fisbone_pad->granulerate_d,
fisbone_pad->preroll, fisbone_pad->granuleshift);
} else {
GST_WARNING_OBJECT (pad->ogg,
"found skeleton fisbone for an unknown stream %" G_GUINT32_FORMAT,
serialno);
}
}
/* function called to convert a granulepos to a timestamp */
static gboolean
gst_ogg_pad_query_convert (GstOggPad * pad, GstFormat src_format,
gint64 src_val, GstFormat * dest_format, gint64 * dest_val)
{
gboolean res;
if (src_val == -1) {
*dest_val = -1;
return TRUE;
}
if (!pad->have_fisbone && pad->elem_pad == NULL)
return FALSE;
switch (src_format) {
case GST_FORMAT_DEFAULT:
if (pad->have_fisbone && *dest_format == GST_FORMAT_TIME) {
*dest_val = gst_annodex_granule_to_time (src_val,
pad->granulerate_n, pad->granulerate_d, pad->granuleshift);
res = TRUE;
} else {
if (pad->elem_pad == NULL)
res = FALSE;
else
res = gst_pad_query_convert (pad->elem_pad, src_format, src_val,
dest_format, dest_val);
}
break;
default:
if (pad->elem_pad == NULL)
res = FALSE;
else
res = gst_pad_query_convert (pad->elem_pad, src_format, src_val,
dest_format, dest_val);
}
return res;
}
/* function called by the internal decoder elements when it outputs
* a buffer. We use it to get the first timestamp of the stream
*/
static GstFlowReturn
gst_ogg_pad_internal_chain (GstPad * pad, GstBuffer * buffer)
{
GstOggPad *oggpad;
GstOggDemux *ogg;
GstClockTime timestamp;
oggpad = gst_pad_get_element_private (pad);
ogg = GST_OGG_DEMUX (oggpad->ogg);
timestamp = GST_BUFFER_TIMESTAMP (buffer);
GST_DEBUG_OBJECT (oggpad, "received buffer from internal pad, TS=%"
GST_TIME_FORMAT "=%" G_GINT64_FORMAT, GST_TIME_ARGS (timestamp),
timestamp);
if (oggpad->start_time == GST_CLOCK_TIME_NONE) {
oggpad->start_time = timestamp;
GST_DEBUG_OBJECT (oggpad, "new start time: %" GST_TIME_FORMAT,
GST_TIME_ARGS (timestamp));
}
gst_buffer_unref (buffer);
return GST_FLOW_OK;
}
static void
internal_element_pad_added_cb (GstElement * element, GstPad * pad,
GstOggPad * oggpad)
{
if (GST_PAD_DIRECTION (pad) == GST_PAD_SRC) {
if (!(gst_pad_link (pad, oggpad->elem_out) == GST_PAD_LINK_OK)) {
GST_ERROR ("Really couldn't find a valid pad");
}
oggpad->dynamic = FALSE;
g_signal_handler_disconnect (element, oggpad->padaddedid);
oggpad->padaddedid = 0;
}
}
/* runs typefind on the packet, which is assumed to be the first
* packet in the stream.
*
* Based on the type returned from the typefind function, an element
* is created to help in conversion between granulepos and timestamps
* so that we can do decent seeking.
*/
static gboolean
gst_ogg_pad_typefind (GstOggPad * pad, ogg_packet * packet)
{
GstBuffer *buf;
GstCaps *caps;
GstElement *element = NULL;
#ifndef GST_DISABLE_GST_DEBUG
GstOggDemux *ogg = pad->ogg;
#endif
if (GST_PAD_CAPS (pad) != NULL)
return TRUE;
/* The ogg spec defines that the first packet of an ogg stream must identify
* the stream. Therefore ogg can use a simplified approach to typefinding
* and only needs to check the first packet */
buf = gst_buffer_new ();
GST_BUFFER_DATA (buf) = packet->packet;
GST_BUFFER_SIZE (buf) = packet->bytes;
GST_BUFFER_OFFSET (buf) = 0;
caps = gst_type_find_helper_for_buffer (GST_OBJECT (pad), buf, NULL);
gst_buffer_unref (buf);
if (caps == NULL) {
GST_WARNING_OBJECT (ogg,
"couldn't find caps for stream with serial %08x", pad->serialno);
caps = gst_caps_new_simple ("application/octet-stream", NULL);
} else {
/* ogg requires you to use a decoder element to define the
* meaning of granulepos etc so we make one. We also do this if
* we are in the streaming mode to calculate the first timestamp. */
GList *factories;
GST_LOG_OBJECT (ogg, "found caps: %" GST_PTR_FORMAT, caps);
/* first filter out the interesting element factories */
factories = gst_default_registry_feature_filter (
(GstPluginFeatureFilter) gst_ogg_demux_factory_filter, FALSE, caps);
/* sort them according to their ranks */
factories = g_list_sort (factories, (GCompareFunc) compare_ranks);
/* then pick the first factory to create an element */
if (factories) {
element =
gst_element_factory_create (GST_ELEMENT_FACTORY (factories->data),
NULL);
if (element) {
GstPadTemplate *template;
/* this is ours */
gst_object_ref (element);
gst_object_sink (GST_OBJECT (element));
/* FIXME, it might not be named "sink" */
pad->elem_pad = gst_element_get_pad (element, "sink");
gst_element_set_state (element, GST_STATE_PAUSED);
template = gst_static_pad_template_get (&internaltemplate);
pad->elem_out = gst_pad_new_from_template (template, "internal");
gst_pad_set_chain_function (pad->elem_out, gst_ogg_pad_internal_chain);
gst_pad_set_element_private (pad->elem_out, pad);
gst_pad_set_active (pad->elem_out, TRUE);
gst_object_unref (template);
/* and this pad may not be named src.. */
/* And it might also not exist at this time... */
{
GstPad *p;
p = gst_element_get_pad (element, "src");
if (p) {
gst_pad_link (p, pad->elem_out);
gst_object_unref (p);
} else {
pad->dynamic = TRUE;
pad->padaddedid = g_signal_connect (G_OBJECT (element),
"pad-added", G_CALLBACK (internal_element_pad_added_cb), pad);
}
}
}
}
g_list_free (factories);
}
pad->element = element;
gst_pad_set_caps (GST_PAD (pad), caps);
gst_caps_unref (caps);
return TRUE;
}
/* send packet to internal element */
static GstFlowReturn
gst_ogg_demux_chain_elem_pad (GstOggPad * pad, ogg_packet * packet)
{
GstBuffer *buf;
GstFlowReturn ret;
#ifndef GST_DISABLE_GST_DEBUG
GstOggDemux *ogg = pad->ogg;
#endif
/* initialize our internal decoder with packets */
if (!pad->elem_pad)
goto no_decoder;
GST_DEBUG_OBJECT (ogg, "%p init decoder serial %08x", pad, pad->serialno);
buf = gst_buffer_new_and_alloc (packet->bytes);
memcpy (GST_BUFFER_DATA (buf), packet->packet, packet->bytes);
gst_buffer_set_caps (buf, GST_PAD_CAPS (pad));
GST_BUFFER_OFFSET (buf) = -1;
GST_BUFFER_OFFSET_END (buf) = packet->granulepos;
ret = gst_pad_chain (pad->elem_pad, buf);
if (GST_FLOW_IS_FATAL (ret))
goto decoder_error;
return ret;
no_decoder:
{
GST_WARNING_OBJECT (ogg,
"pad %08x does not have elem_pad, no decoder ?", pad);
return GST_FLOW_ERROR;
}
decoder_error:
{
GST_WARNING_OBJECT (ogg, "internal decoder error");
return GST_FLOW_ERROR;
}
}
/* queue data */
static GstFlowReturn
gst_ogg_demux_queue_data (GstOggPad * pad, ogg_packet * packet)
{
GstBuffer *buf;
#ifndef GST_DISABLE_GST_DEBUG
GstOggDemux *ogg = pad->ogg;
#endif
GST_DEBUG_OBJECT (ogg, "%p queueing data serial %08x", pad, pad->serialno);
buf = gst_buffer_new_and_alloc (packet->bytes);
memcpy (buf->data, packet->packet, packet->bytes);
GST_BUFFER_OFFSET (buf) = -1;
GST_BUFFER_OFFSET_END (buf) = packet->granulepos;
pad->headers = g_list_append (pad->headers, buf);
/* we are ok now */
return GST_FLOW_OK;
}
/* send packet to internal element */
static GstFlowReturn
gst_ogg_demux_chain_peer (GstOggPad * pad, ogg_packet * packet)
{
GstBuffer *buf;
GstFlowReturn ret, cret;
GstOggDemux *ogg = pad->ogg;
GstFormat format;
gint64 current_time;
GstOggChain *chain;
GST_DEBUG_OBJECT (ogg,
"%p streaming to peer serial %08x", pad, pad->serialno);
ret =
gst_pad_alloc_buffer_and_set_caps (GST_PAD_CAST (pad),
GST_BUFFER_OFFSET_NONE, packet->bytes, GST_PAD_CAPS (pad), &buf);
/* combine flows */
cret = gst_ogg_demux_combine_flows (ogg, pad, ret);
if (ret != GST_FLOW_OK)
goto no_buffer;
/* copy packet in buffer */
memcpy (buf->data, packet->packet, packet->bytes);
GST_BUFFER_OFFSET (buf) = -1;
GST_BUFFER_OFFSET_END (buf) = packet->granulepos;
/* Mark discont on the buffer */
if (pad->discont) {
GST_BUFFER_FLAG_SET (buf, GST_BUFFER_FLAG_DISCONT);
pad->discont = FALSE;
}
ret = gst_pad_push (GST_PAD_CAST (pad), buf);
/* combine flows */
cret = gst_ogg_demux_combine_flows (ogg, pad, ret);
/* we're done with skeleton stuff */
if (pad->is_skeleton)
goto done;
/* check if valid granulepos, then we can calculate the current
* position */
if (packet->granulepos < 0)
goto done;
/* store current granule pos */
ogg->current_granule = packet->granulepos;
/* convert to time */
format = GST_FORMAT_TIME;
if (!gst_ogg_pad_query_convert (pad,
GST_FORMAT_DEFAULT, packet->granulepos, &format,
(gint64 *) & current_time))
goto convert_failed;
/* convert to stream time */
if ((chain = pad->chain))
current_time = current_time - chain->segment_start + chain->begin_time;
/* and store as the current position */
gst_segment_set_last_stop (&ogg->segment, GST_FORMAT_TIME, current_time);
GST_DEBUG_OBJECT (ogg, "ogg current time %" GST_TIME_FORMAT,
GST_TIME_ARGS (current_time));
done:
/* return combined flow result */
return cret;
/* special cases */
no_buffer:
{
GST_DEBUG_OBJECT (ogg,
"%p could not get buffer from peer %08x, %d (%s), combined %d (%s)",
pad, pad->serialno, ret, gst_flow_get_name (ret),
cret, gst_flow_get_name (cret));
goto done;
}
convert_failed:
{
GST_WARNING_OBJECT (ogg, "could not convert granulepos to time");
goto done;
}
}
/* submit a packet to the oggpad, this function will run the
* typefind code for the pad if this is the first packet for this
* stream
*/
static GstFlowReturn
gst_ogg_pad_submit_packet (GstOggPad * pad, ogg_packet * packet)
{
gint64 granule;
GstFlowReturn ret;
GstOggDemux *ogg = pad->ogg;
GST_DEBUG_OBJECT (ogg, "%p submit packet serial %08x", pad, pad->serialno);
if (!pad->have_type) {
if (!ogg->have_fishead && packet->bytes == SKELETON_FISHEAD_SIZE &&
!memcmp (packet->packet, "fishead\0", 8)) {
gst_ogg_pad_parse_skeleton_fishead (pad, packet);
}
gst_ogg_pad_typefind (pad, packet);
pad->have_type = TRUE;
}
if (ogg->have_fishead && packet->bytes >= SKELETON_FISBONE_MIN_SIZE &&
!memcmp (packet->packet, "fisbone\0", 8)) {
gst_ogg_pad_parse_skeleton_fisbone (pad, packet);
}
granule = packet->granulepos;
if (granule != -1) {
GST_DEBUG_OBJECT (ogg, "%p has granulepos %" G_GINT64_FORMAT, pad, granule);
ogg->current_granule = granule;
pad->current_granule = granule;
/* granulepos 0 and -1 are considered header packets.
* Note that since theora is busted, it can create non-header
* packets with 0 granulepos. We will correct for this when our
* internal decoder produced a frame and we don't have a
* granulepos because in that case the granulpos must have been 0 */
if (pad->first_granule == -1 && granule != 0) {
GST_DEBUG_OBJECT (ogg, "%p found first granulepos %" G_GINT64_FORMAT, pad,
granule);
pad->first_granule = granule;
}
}
/* no start time known, stream to internal plugin to
* get time. always stream to the skeleton decoder */
if (pad->start_time == GST_CLOCK_TIME_NONE || pad->is_skeleton) {
ret = gst_ogg_demux_chain_elem_pad (pad, packet);
}
/* we know the start_time of the pad data, see if we
* can activate the complete chain if this is a dynamic
* chain. */
if (pad->start_time != GST_CLOCK_TIME_NONE) {
GstOggChain *chain = pad->chain;
/* correction for busted ogg, if the internal decoder outputed
* a timestamp but we did not get a granulepos, it must have
* been 0 and the time is therefore also 0 */
if (pad->first_granule == -1) {
GST_DEBUG_OBJECT (ogg, "%p found start time without granulepos", pad);
pad->first_granule = 0;
pad->first_time = 0;
}
/* check if complete chain has start time */
if (chain == ogg->building_chain) {
/* see if we have enough info to activate the chain */
if (gst_ogg_demux_collect_chain_info (ogg, chain)) {
GstEvent *event;
GstClockTime segment_start, segment_stop, segment_time;
GST_DEBUG_OBJECT (ogg, "chain->begin_time: %" GST_TIME_FORMAT,
GST_TIME_ARGS (chain->begin_time));
GST_DEBUG_OBJECT (ogg, "chain->segment_start: %" GST_TIME_FORMAT,
GST_TIME_ARGS (chain->segment_start));
GST_DEBUG_OBJECT (ogg, "chain->segment_stop: %" GST_TIME_FORMAT,
GST_TIME_ARGS (chain->segment_stop));
if (chain->begin_time != GST_CLOCK_TIME_NONE) {
segment_time = chain->begin_time;
segment_start = chain->segment_start - chain->begin_time;
if (chain->segment_stop != GST_CLOCK_TIME_NONE) {
segment_stop = chain->segment_stop - chain->begin_time;
} else {
segment_stop = GST_CLOCK_TIME_NONE;
}
} else {
segment_start = chain->segment_start;
segment_stop = chain->segment_stop;
segment_time = 0;
}
GST_DEBUG_OBJECT (ogg, "segment_start: %" GST_TIME_FORMAT,
GST_TIME_ARGS (segment_start));
GST_DEBUG_OBJECT (ogg, "segment_stop: %" GST_TIME_FORMAT,
GST_TIME_ARGS (segment_stop));
GST_DEBUG_OBJECT (ogg, "segment_time: %" GST_TIME_FORMAT,
GST_TIME_ARGS (segment_time));
/* create the newsegment event we are going to send out */
event = gst_event_new_new_segment (FALSE, ogg->segment.rate,
GST_FORMAT_TIME, segment_start, segment_stop, segment_time);
gst_ogg_demux_activate_chain (ogg, chain, event);
ogg->building_chain = NULL;
}
}
}
/* if we are building a chain, store buffer for when we activate
* it. This path is taken if we operate in streaming mode. */
if (ogg->building_chain) {
ret = gst_ogg_demux_queue_data (pad, packet);
}
/* else we are completely streaming to the peer */
else {
ret = gst_ogg_demux_chain_peer (pad, packet);
}
return ret;
}
/* submit a page to an oggpad, this function will then submit all
* the packets in the page.
*/
static GstFlowReturn
gst_ogg_pad_submit_page (GstOggPad * pad, ogg_page * page)
{
ogg_packet packet;
int ret;
gboolean done = FALSE;
GstFlowReturn result = GST_FLOW_OK;
GstOggDemux *ogg;
ogg = GST_OGG_DEMUX (GST_PAD_PARENT (pad));
if (ogg_stream_pagein (&pad->stream, page) != 0)
goto choked;
while (!done) {
ret = ogg_stream_packetout (&pad->stream, &packet);
GST_LOG_OBJECT (ogg, "packetout gave %d", ret);
switch (ret) {
case 0:
done = TRUE;
break;
case -1:
/* out of sync, could call gst_ogg_pad_reset() here but ogg can decode
* the packet just fine. We should probably send a DISCONT though. */
break;
case 1:
result = gst_ogg_pad_submit_packet (pad, &packet);
if (GST_FLOW_IS_FATAL (result))
goto could_not_submit;
break;
default:
GST_WARNING_OBJECT (ogg,
"invalid return value %d for ogg_stream_packetout, resetting stream",
ret);
gst_ogg_pad_reset (pad);
break;
}
}
return result;
choked:
{
GST_WARNING_OBJECT (ogg,
"ogg stream choked on page (serial %08x), resetting stream",
pad->serialno);
gst_ogg_pad_reset (pad);
/* we continue to recover */
return GST_FLOW_OK;
}
could_not_submit:
{
GST_WARNING_OBJECT (ogg, "could not submit packet, error: %d", result);
gst_ogg_pad_reset (pad);
return result;
}
}
static GstOggChain *
gst_ogg_chain_new (GstOggDemux * ogg)
{
GstOggChain *chain = g_new0 (GstOggChain, 1);
GST_DEBUG_OBJECT (ogg, "creating new chain %p", chain);
chain->ogg = ogg;
chain->offset = -1;
chain->bytes = -1;
chain->have_bos = FALSE;
chain->streams = g_array_new (FALSE, TRUE, sizeof (GstOggPad *));
chain->begin_time = GST_CLOCK_TIME_NONE;
chain->segment_start = GST_CLOCK_TIME_NONE;
chain->segment_stop = GST_CLOCK_TIME_NONE;
chain->total_time = GST_CLOCK_TIME_NONE;
return chain;
}
static void
gst_ogg_chain_free (GstOggChain * chain)
{
gint i;
for (i = 0; i < chain->streams->len; i++) {
GstOggPad *pad = g_array_index (chain->streams, GstOggPad *, i);
gst_object_unref (pad);
}
g_array_free (chain->streams, TRUE);
g_free (chain);
}
static void
gst_ogg_chain_mark_discont (GstOggChain * chain)
{
gint i;
for (i = 0; i < chain->streams->len; i++) {
GstOggPad *pad = g_array_index (chain->streams, GstOggPad *, i);
pad->discont = TRUE;
}
}
static GstOggPad *
gst_ogg_chain_new_stream (GstOggChain * chain, glong serialno)
{
GstOggPad *ret;
GstTagList *list;
gchar *name;
GST_DEBUG_OBJECT (chain->ogg, "creating new stream %08x in chain %p",
serialno, chain);
ret = g_object_new (GST_TYPE_OGG_PAD, NULL);
/* we own this one */
gst_object_ref (ret);
gst_object_sink (GST_OBJECT (ret));
list = gst_tag_list_new ();
name = g_strdup_printf ("serial_%08lx", serialno);
GST_PAD_DIRECTION (ret) = GST_PAD_SRC;
ret->chain = chain;
ret->ogg = chain->ogg;
ret->discont = TRUE;
gst_object_set_name (GST_OBJECT (ret), name);
g_free (name);
ret->serialno = serialno;
if (ogg_stream_init (&ret->stream, serialno) != 0) {
GST_ERROR ("Could not initialize ogg_stream struct for serial %08x.",
serialno);
gst_object_unref (ret);
return NULL;
}
gst_tag_list_add (list, GST_TAG_MERGE_REPLACE, GST_TAG_SERIAL, serialno,
NULL);
/* FIXME: either have it or remove it */
//gst_element_found_tags (GST_ELEMENT (ogg), list);
gst_tag_list_free (list);
GST_DEBUG_OBJECT (chain->ogg,
"created new ogg src %p for stream with serial %08x", ret, serialno);
g_array_append_val (chain->streams, ret);
return ret;
}
static GstOggPad *
gst_ogg_chain_get_stream (GstOggChain * chain, glong serialno)
{
gint i;
for (i = 0; i < chain->streams->len; i++) {
GstOggPad *pad = g_array_index (chain->streams, GstOggPad *, i);
if (pad->serialno == serialno)
return pad;
}
return NULL;
}
static gboolean
gst_ogg_chain_has_stream (GstOggChain * chain, glong serialno)
{
return gst_ogg_chain_get_stream (chain, serialno) != NULL;
}
#define CURRENT_CHAIN(ogg) (&g_array_index ((ogg)->chains, GstOggChain, (ogg)->current_chain))
/* signals and args */
enum
{
/* FILL ME */
LAST_SIGNAL
};
enum
{
ARG_0
/* FILL ME */
};
static GstStaticPadTemplate ogg_demux_src_template_factory =
GST_STATIC_PAD_TEMPLATE ("src_%d",
GST_PAD_SRC,
GST_PAD_SOMETIMES,
GST_STATIC_CAPS_ANY);
static GstStaticPadTemplate ogg_demux_sink_template_factory =
GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("application/ogg; application/x-annodex")
);
static void gst_ogg_demux_finalize (GObject * object);
//static const GstEventMask *gst_ogg_demux_get_event_masks (GstPad * pad);
//static const GstQueryType *gst_ogg_demux_get_query_types (GstPad * pad);
static GstOggChain *gst_ogg_demux_read_chain (GstOggDemux * ogg);
static gint gst_ogg_demux_read_end_chain (GstOggDemux * ogg,
GstOggChain * chain);
static gboolean gst_ogg_demux_sink_event (GstPad * pad, GstEvent * event);
static void gst_ogg_demux_loop (GstOggPad * pad);
static GstFlowReturn gst_ogg_demux_chain (GstPad * pad, GstBuffer * buffer);
static gboolean gst_ogg_demux_sink_activate (GstPad * sinkpad);
static gboolean gst_ogg_demux_sink_activate_pull (GstPad * sinkpad,
gboolean active);
static gboolean gst_ogg_demux_sink_activate_push (GstPad * sinkpad,
gboolean active);
static GstStateChangeReturn gst_ogg_demux_change_state (GstElement * element,
GstStateChange transition);
static void gst_ogg_demux_send_event (GstOggDemux * ogg, GstEvent * event);
static void gst_ogg_print (GstOggDemux * demux);
GST_BOILERPLATE (GstOggDemux, gst_ogg_demux, GstElement, GST_TYPE_ELEMENT);
static void
gst_ogg_demux_base_init (gpointer g_class)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
gst_element_class_set_details (element_class, &gst_ogg_demux_details);
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&ogg_demux_sink_template_factory));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&ogg_demux_src_template_factory));
}
static void
gst_ogg_demux_class_init (GstOggDemuxClass * klass)
{
GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass);
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
gstelement_class->change_state = gst_ogg_demux_change_state;
gstelement_class->send_event = gst_ogg_demux_receive_event;
gobject_class->finalize = gst_ogg_demux_finalize;
}
static void
gst_ogg_demux_init (GstOggDemux * ogg, GstOggDemuxClass * g_class)
{
/* create the sink pad */
ogg->sinkpad =
gst_pad_new_from_static_template (&ogg_demux_sink_template_factory,
"sink");
gst_pad_set_event_function (ogg->sinkpad, gst_ogg_demux_sink_event);
gst_pad_set_chain_function (ogg->sinkpad, gst_ogg_demux_chain);
gst_pad_set_activate_function (ogg->sinkpad, gst_ogg_demux_sink_activate);
gst_pad_set_activatepull_function (ogg->sinkpad,
gst_ogg_demux_sink_activate_pull);
gst_pad_set_activatepush_function (ogg->sinkpad,
gst_ogg_demux_sink_activate_push);
gst_element_add_pad (GST_ELEMENT (ogg), ogg->sinkpad);
ogg->chain_lock = g_mutex_new ();
ogg->chains = g_array_new (FALSE, TRUE, sizeof (GstOggChain *));
}
static void
gst_ogg_demux_finalize (GObject * object)
{
GstOggDemux *ogg;
ogg = GST_OGG_DEMUX (object);
g_array_free (ogg->chains, TRUE);
g_mutex_free (ogg->chain_lock);
ogg_sync_clear (&ogg->sync);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static gboolean
gst_ogg_demux_sink_event (GstPad * pad, GstEvent * event)
{
gboolean res;
GstOggDemux *ogg;
ogg = GST_OGG_DEMUX (gst_pad_get_parent (pad));
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_NEWSEGMENT:
/* FIXME */
GST_DEBUG_OBJECT (ogg, "got a new segment event");
ogg_sync_reset (&ogg->sync);
gst_event_unref (event);
res = TRUE;
break;
case GST_EVENT_EOS:
default:
res = gst_pad_event_default (pad, event);
break;
}
gst_object_unref (ogg);
return res;
}
/* submit the given buffer to the ogg sync.
*
* Returns the number of bytes submited.
*/
static gint
gst_ogg_demux_submit_buffer (GstOggDemux * ogg, GstBuffer * buffer)
{
gint size;
guint8 *data;
gchar *oggbuffer;
size = GST_BUFFER_SIZE (buffer);
data = GST_BUFFER_DATA (buffer);
GST_DEBUG_OBJECT (ogg, "submitting %u bytes", size);
oggbuffer = ogg_sync_buffer (&ogg->sync, size);
memcpy (oggbuffer, data, size);
ogg_sync_wrote (&ogg->sync, size);
gst_buffer_unref (buffer);
return size;
}
/* in random access mode this code updates the current read position
* and resets the ogg sync buffer so that the next read will happen
* from this new location.
*/
static void
gst_ogg_demux_seek (GstOggDemux * ogg, gint64 offset)
{
GST_LOG_OBJECT (ogg, "seeking to %" G_GINT64_FORMAT, offset);
ogg->offset = offset;
ogg_sync_reset (&ogg->sync);
}
/* read more data from the current offset and submit to
* the ogg sync layer.
*
* Return number of bytes written or 0 on EOS or -1 on error.
*/
static gint
gst_ogg_demux_get_data (GstOggDemux * ogg)
{
GstFlowReturn ret;
GstBuffer *buffer;
gint size;
GST_LOG_OBJECT (ogg, "get data %" G_GINT64_FORMAT " %" G_GINT64_FORMAT,
ogg->offset, ogg->length);
if (ogg->offset == ogg->length)
goto eos;
ret = gst_pad_pull_range (ogg->sinkpad, ogg->offset, CHUNKSIZE, &buffer);
if (ret != GST_FLOW_OK)
goto error;
size = gst_ogg_demux_submit_buffer (ogg, buffer);
return size;
/* ERROR */
eos:
{
GST_LOG_OBJECT (ogg, "reached EOS");
return 0;
}
error:
{
GST_WARNING_OBJECT (ogg, "got %d (%s) from pull range", ret,
gst_flow_get_name (ret));
ogg->chain_error = ret;
return -1;
}
}
/* Read the next page from the current offset.
* boundary: number of bytes ahead we allow looking for;
* -1 if no boundary
* returns the offset the next page starts at, or OV_FALSE if we couldn't
* find a new page within the boundary
*/
static gint64
gst_ogg_demux_get_next_page (GstOggDemux * ogg, ogg_page * og, gint64 boundary)
{
gint64 end_offset = 0;
GST_LOG_OBJECT (ogg,
"get next page, current offset %" G_GINT64_FORMAT ", bytes boundary %"
G_GINT64_FORMAT, ogg->offset, boundary);
if (boundary > 0)
end_offset = ogg->offset + boundary;
while (TRUE) {
glong more;
if (boundary > 0 && ogg->offset >= end_offset) {
GST_LOG_OBJECT (ogg,
"offset %" G_GINT64_FORMAT " >= end_offset %" G_GINT64_FORMAT,
ogg->offset, end_offset);
return OV_FALSE;
}
more = ogg_sync_pageseek (&ogg->sync, og);
GST_LOG_OBJECT (ogg, "pageseek gave %ld", more);
if (more < 0) {
GST_LOG_OBJECT (ogg, "skipped %ld bytes", more);
/* skipped n bytes */
ogg->offset -= more;
} else if (more == 0) {
gint ret;
/* send more paramedics */
if (boundary == 0)
return OV_FALSE;
ret = gst_ogg_demux_get_data (ogg);
if (ret == 0)
return OV_EOF;
if (ret < 0)
return OV_EREAD;
} else {
/* got a page. Return the offset at the page beginning,
advance the internal offset past the page end */
gint64 ret = ogg->offset;
ogg->offset += more;
/* need to reset as we do not keep track of the bytes we
* sent to the sync layer */
ogg_sync_reset (&ogg->sync);
GST_LOG_OBJECT (ogg,
"got page at %" G_GINT64_FORMAT ", serial %08x, end at %"
G_GINT64_FORMAT ", granule %" G_GINT64_FORMAT, ret,
ogg_page_serialno (og), ogg->offset, ogg_page_granulepos (og));
return ret;
}
}
}
/* from the current offset, find the previous page, seeking backwards
* until we find the page. */
static gint
gst_ogg_demux_get_prev_page (GstOggDemux * ogg, ogg_page * og)
{
gint64 begin = ogg->offset;
gint64 end = begin;
gint64 ret;
gint64 offset = -1;
while (offset == -1) {
begin -= CHUNKSIZE;
if (begin < 0)
begin = 0;
gst_ogg_demux_seek (ogg, begin);
/* now continue reading until we run out of data, if we find a page
* start, we save it. It might not be the final page as there could be
* another page after this one. */
while (ogg->offset < end) {
ret = gst_ogg_demux_get_next_page (ogg, og, end - ogg->offset);
if (ret == OV_EREAD)
return OV_EREAD;
if (ret < 0) {
break;
} else {
offset = ret;
}
}
}
/* we have the offset. Actually snork and hold the page now */
gst_ogg_demux_seek (ogg, offset);
ret = gst_ogg_demux_get_next_page (ogg, og, CHUNKSIZE);
if (ret < 0)
/* this shouldn't be possible */
return OV_EFAULT;
return offset;
}
static gboolean
gst_ogg_demux_deactivate_current_chain (GstOggDemux * ogg)
{
gint i;
GstOggChain *chain = ogg->current_chain;
if (chain == NULL)
return TRUE;
GST_DEBUG_OBJECT (ogg, "deactivating chain %p", chain);
/* send EOS on all the pads */
for (i = 0; i < chain->streams->len; i++) {
GstOggPad *pad = g_array_index (chain->streams, GstOggPad *, i);
gst_pad_push_event (GST_PAD_CAST (pad), gst_event_new_eos ());
GST_DEBUG_OBJECT (ogg, "removing pad %" GST_PTR_FORMAT, pad);
/* deactivate first */
gst_pad_set_active (GST_PAD_CAST (pad), FALSE);
gst_element_remove_pad (GST_ELEMENT (ogg), GST_PAD_CAST (pad));
}
/* if we cannot seek back to the chain, we can destroy the chain
* completely */
if (!ogg->seekable) {
gst_ogg_chain_free (chain);
}
ogg->current_chain = NULL;
return TRUE;
}
static gboolean
gst_ogg_demux_activate_chain (GstOggDemux * ogg, GstOggChain * chain,
GstEvent * event)
{
gint i;
if (chain == ogg->current_chain) {
if (event)
gst_event_unref (event);
return TRUE;
}
gst_ogg_demux_deactivate_current_chain (ogg);
/* FIXME, should not be called with NULL */
if (chain == NULL) {
ogg->current_chain = chain;
return TRUE;
}
GST_DEBUG_OBJECT (ogg, "activating chain %p", chain);
/* first add the pads */
for (i = 0; i < chain->streams->len; i++) {
GstOggPad *pad;
pad = g_array_index (chain->streams, GstOggPad *, i);
GST_DEBUG_OBJECT (ogg, "adding pad %" GST_PTR_FORMAT, pad);
/* mark discont */
pad->discont = TRUE;
pad->last_ret = GST_FLOW_OK;
/* activate first */
gst_pad_set_active (GST_PAD_CAST (pad), TRUE);
gst_element_add_pad (GST_ELEMENT (ogg), GST_PAD_CAST (pad));
}
gst_element_no_more_pads (GST_ELEMENT (ogg));
ogg->current_chain = chain;
if (event)
gst_ogg_demux_send_event (ogg, event);
GST_DEBUG_OBJECT (ogg, "starting chain");
/* then send out any queued buffers */
for (i = 0; i < chain->streams->len; i++) {
GList *headers;
GstOggPad *pad;
pad = g_array_index (chain->streams, GstOggPad *, i);
for (headers = pad->headers; headers; headers = g_list_next (headers)) {
GstBuffer *buffer = GST_BUFFER (headers->data);
if (pad->discont) {
GST_BUFFER_FLAG_SET (buffer, GST_BUFFER_FLAG_DISCONT);
pad->discont = FALSE;
}
/* we don't care about the return value here */
gst_pad_push (GST_PAD_CAST (pad), buffer);
}
/* and free the headers */
g_list_free (pad->headers);
pad->headers = NULL;
}
return TRUE;
}
/*
* do seek to time @position, return FALSE or chain and TRUE
*/
static gboolean
gst_ogg_demux_do_seek (GstOggDemux * ogg, gint64 position, gboolean accurate,
GstOggChain ** rchain)
{
GstOggChain *chain = NULL;
gint64 begin, end;
gint64 begintime, endtime;
gint64 target;
gint64 best;
gint64 total;
gint64 result = 0;
gint i;
/* first find the chain to search in */
total = ogg->total_time;
if (ogg->chains->len == 0)
goto no_chains;
for (i = ogg->chains->len - 1; i >= 0; i--) {
chain = g_array_index (ogg->chains, GstOggChain *, i);
total -= chain->total_time;
if (position >= total)
break;
}
begin = chain->offset;
end = chain->end_offset;
begintime = chain->begin_time;
endtime = chain->begin_time + chain->total_time;
target = position - total + begintime;
if (accurate) {
/* FIXME, seek 4 seconds early to catch keyframes, better implement
* keyframe detection. */
target = target - (gint64) 4 *GST_SECOND;
}
target = MAX (target, 0);
best = begin;
GST_DEBUG_OBJECT (ogg,
"seeking to %" GST_TIME_FORMAT " in chain %p",
GST_TIME_ARGS (position), chain);
GST_DEBUG_OBJECT (ogg,
"chain offset %" G_GINT64_FORMAT ", end offset %" G_GINT64_FORMAT, begin,
end);
GST_DEBUG_OBJECT (ogg,
"chain begin time %" GST_TIME_FORMAT ", end time %" GST_TIME_FORMAT,
GST_TIME_ARGS (begintime), GST_TIME_ARGS (endtime));
GST_DEBUG_OBJECT (ogg, "target %" GST_TIME_FORMAT, GST_TIME_ARGS (target));
/* perform the seek */
while (begin < end) {
gint64 bisect;
if ((end - begin < CHUNKSIZE) || (endtime == begintime)) {
bisect = begin;
} else {
/* take a (pretty decent) guess, avoiding overflow */
gint64 rate = (end - begin) * GST_MSECOND / (endtime - begintime);
bisect = (target - begintime) / GST_MSECOND * rate + begin - CHUNKSIZE;
if (bisect <= begin)
bisect = begin;
GST_DEBUG_OBJECT (ogg, "Initial guess: %" G_GINT64_FORMAT, bisect);
}
gst_ogg_demux_seek (ogg, bisect);
while (begin < end) {
ogg_page og;
GST_DEBUG_OBJECT (ogg,
"after seek, bisect %" G_GINT64_FORMAT ", begin %" G_GINT64_FORMAT
", end %" G_GINT64_FORMAT, bisect, begin, end);
result = gst_ogg_demux_get_next_page (ogg, &og, end - ogg->offset);
GST_LOG_OBJECT (ogg, "looking for next page returned %" G_GINT64_FORMAT,
result);
if (result == OV_EREAD) {
goto seek_error;
}
if (result < 0) {
if (bisect <= begin + 1) {
end = begin; /* found it */
} else {
if (bisect == 0)
goto seek_error;
bisect -= CHUNKSIZE;
if (bisect <= begin)
bisect = begin + 1;
gst_ogg_demux_seek (ogg, bisect);
}
} else {
/* found offset of next ogg page */
gint64 granulepos;
GstClockTime granuletime;
GstFormat format;
GstOggPad *pad;
GST_LOG_OBJECT (ogg, "found next ogg page at %" G_GINT64_FORMAT,
result);
granulepos = ogg_page_granulepos (&og);
if (granulepos == -1) {
GST_LOG_OBJECT (ogg, "granulepos of next page is -1");
continue;
}
pad = gst_ogg_chain_get_stream (chain, ogg_page_serialno (&og));
if (pad == NULL || pad->is_skeleton)
continue;
format = GST_FORMAT_TIME;
if (!gst_ogg_pad_query_convert (pad,
GST_FORMAT_DEFAULT, granulepos, &format,
(gint64 *) & granuletime)) {
GST_WARNING_OBJECT (ogg, "could not convert granulepos to time");
granuletime = target;
} else {
if (granuletime < pad->start_time)
continue;
GST_LOG_OBJECT (ogg, "granulepos %" G_GINT64_FORMAT " maps to time %"
GST_TIME_FORMAT, granulepos, GST_TIME_ARGS (granuletime));
granuletime -= pad->start_time;
}
GST_DEBUG_OBJECT (ogg,
"found page with granule %" G_GINT64_FORMAT " and time %"
GST_TIME_FORMAT, granulepos, GST_TIME_ARGS (granuletime));
if (granuletime < target) {
best = result; /* raw offset of packet with granulepos */
begin = ogg->offset; /* raw offset of next page */
begintime = granuletime;
if (target - begintime > GST_SECOND)
break;
bisect = begin; /* *not* begin + 1 */
} else {
if (bisect <= begin + 1) {
end = begin; /* found it */
} else {
if (end == ogg->offset) { /* we're pretty close - we'd be stuck in */
end = result;
bisect -= CHUNKSIZE; /* an endless loop otherwise. */
if (bisect <= begin)
bisect = begin + 1;
gst_ogg_demux_seek (ogg, bisect);
} else {
end = result;
endtime = granuletime;
break;
}
}
}
}
}
}
ogg->offset = best;
*rchain = chain;
return TRUE;
no_chains:
{
GST_DEBUG_OBJECT (ogg, "no chains");
return FALSE;
}
seek_error:
{
GST_DEBUG_OBJECT (ogg, "got a seek error");
return FALSE;
}
}
/* does not take ownership of the event */
static gboolean
gst_ogg_demux_perform_seek (GstOggDemux * ogg, GstEvent * event)
{
GstOggChain *chain = NULL;
gboolean res;
gboolean flush, accurate;
GstFormat format;
gdouble rate;
GstSeekFlags flags;
GstSeekType cur_type, stop_type;
gint64 cur, stop;
gboolean update;
if (event) {
GST_DEBUG_OBJECT (ogg, "seek with event");
gst_event_parse_seek (event, &rate, &format, &flags,
&cur_type, &cur, &stop_type, &stop);
/* we can only seek on time */
if (format != GST_FORMAT_TIME) {
GST_DEBUG_OBJECT (ogg, "can only seek on TIME");
goto error;
}
/* cannot yet do backwards playback */
if (rate <= 0.0) {
GST_DEBUG_OBJECT (ogg, "can only seek with positive rate, not %lf", rate);
goto error;
}
} else {
GST_DEBUG_OBJECT (ogg, "seek without event");
flags = 0;
rate = 1.0;
}
GST_DEBUG_OBJECT (ogg, "seek, rate %g", rate);
flush = flags & GST_SEEK_FLAG_FLUSH;
accurate = flags & GST_SEEK_FLAG_ACCURATE;
/* first step is to unlock the streaming thread if it is
* blocked in a chain call, we do this by starting the flush. because
* we cannot yet hold any streaming lock, we have to protect the chains
* with their own lock. */
if (flush) {
gint i;
gst_pad_push_event (ogg->sinkpad, gst_event_new_flush_start ());
GST_CHAIN_LOCK (ogg);
for (i = 0; i < ogg->chains->len; i++) {
GstOggChain *chain = g_array_index (ogg->chains, GstOggChain *, i);
gint j;
for (j = 0; j < chain->streams->len; j++) {
GstOggPad *pad = g_array_index (chain->streams, GstOggPad *, j);
gst_pad_push_event (GST_PAD (pad), gst_event_new_flush_start ());
}
}
GST_CHAIN_UNLOCK (ogg);
} else {
gst_pad_pause_task (ogg->sinkpad);
}
/* now grab the stream lock so that streaming cannot continue, for
* non flushing seeks when the element is in PAUSED this could block
* forever. */
GST_PAD_STREAM_LOCK (ogg->sinkpad);
if (ogg->segment_running && !flush) {
/* create the segment event to close the current segment */
if ((chain = ogg->current_chain)) {
GstEvent *newseg;
newseg = gst_event_new_new_segment (TRUE, ogg->segment.rate,
GST_FORMAT_TIME, ogg->segment.start + chain->segment_start,
ogg->segment.last_stop + chain->segment_start, ogg->segment.time);
/* send segment on old chain */
gst_ogg_demux_send_event (ogg, newseg);
}
}
if (event) {
gst_segment_set_seek (&ogg->segment, rate, format, flags,
cur_type, cur, stop_type, stop, &update);
}
GST_DEBUG_OBJECT (ogg, "segment positions set to %" GST_TIME_FORMAT "-%"
GST_TIME_FORMAT, GST_TIME_ARGS (ogg->segment.start),
GST_TIME_ARGS (ogg->segment.stop));
/* we need to stop flushing on the srcpad as we're going to use it
* next. We can do this as we have the STREAM lock now. */
gst_pad_push_event (ogg->sinkpad, gst_event_new_flush_stop ());
{
gint i;
/* reset all ogg streams now, need to do this from within the lock to
* make sure the streaming thread is not messing with the stream */
for (i = 0; i < ogg->chains->len; i++) {
GstOggChain *chain = g_array_index (ogg->chains, GstOggChain *, i);
gint j;
for (j = 0; j < chain->streams->len; j++) {
GstOggPad *pad = g_array_index (chain->streams, GstOggPad *, j);
ogg_stream_reset (&pad->stream);
}
}
}
res = gst_ogg_demux_do_seek (ogg, ogg->segment.last_stop, accurate, &chain);
/* seek failed, make sure we continue the current chain */
if (!res) {
chain = ogg->current_chain;
}
/* now we have a new position, prepare for streaming again */
{
GstEvent *event;
gint64 stop;
gint64 start;
/* we have to send the flush to the old chain, not the new one */
if (flush)
gst_ogg_demux_send_event (ogg, gst_event_new_flush_stop ());
if ((stop = ogg->segment.stop) == -1)
stop = ogg->segment.duration;
if (stop != -1)
stop += chain->segment_start;
start = ogg->segment.last_stop;
if (chain->segment_start != GST_CLOCK_TIME_NONE)
start += chain->segment_start;
/* create the segment event we are going to send out */
event = gst_event_new_new_segment (FALSE, ogg->segment.rate,
ogg->segment.format, start, stop, ogg->segment.time);
if (chain != ogg->current_chain) {
/* switch to different chain, send segment on new chain */
gst_ogg_demux_activate_chain (ogg, chain, event);
} else {
/* mark discont and send segment on current chain */
gst_ogg_chain_mark_discont (chain);
gst_ogg_demux_send_event (ogg, event);
}
/* notify start of new segment */
if (ogg->segment.flags & GST_SEEK_FLAG_SEGMENT) {
gst_element_post_message (GST_ELEMENT (ogg),
gst_message_new_segment_start (GST_OBJECT (ogg),
GST_FORMAT_TIME, ogg->segment.last_stop));
}
ogg->segment_running = TRUE;
/* restart our task since it might have been stopped when we did the
* flush. */
gst_pad_start_task (ogg->sinkpad, (GstTaskFunction) gst_ogg_demux_loop,
ogg->sinkpad);
}
/* streaming can continue now */
GST_PAD_STREAM_UNLOCK (ogg->sinkpad);
return res;
error:
{
GST_DEBUG_OBJECT (ogg, "seek failed");
return FALSE;
}
}
/* finds each bitstream link one at a time using a bisection search
* (has to begin by knowing the offset of the lb's initial page).
* Recurses for each link so it can alloc the link storage after
* finding them all, then unroll and fill the cache at the same time
*/
static gint
gst_ogg_demux_bisect_forward_serialno (GstOggDemux * ogg,
gint64 begin, gint64 searched, gint64 end, GstOggChain * chain, glong m)
{
gint64 endsearched = end;
gint64 next = end;
ogg_page og;
gint64 ret;
GstOggChain *nextchain;
GST_LOG_OBJECT (ogg,
"bisect begin: %" G_GINT64_FORMAT ", searched: %" G_GINT64_FORMAT
", end %" G_GINT64_FORMAT ", chain: %p", begin, searched, end, chain);
/* the below guards against garbage seperating the last and
* first pages of two links. */
while (searched < endsearched) {
gint64 bisect;
if (endsearched - searched < CHUNKSIZE) {
bisect = searched;
} else {
bisect = (searched + endsearched) / 2;
}
gst_ogg_demux_seek (ogg, bisect);
ret = gst_ogg_demux_get_next_page (ogg, &og, -1);
if (ret == OV_EREAD) {
GST_LOG_OBJECT (ogg, "OV_EREAD");
return OV_EREAD;
}
if (ret < 0) {
endsearched = bisect;
} else {
glong serial = ogg_page_serialno (&og);
if (!gst_ogg_chain_has_stream (chain, serial)) {
endsearched = bisect;
next = ret;
} else {
searched = ret + og.header_len + og.body_len;
}
}
}
GST_LOG_OBJECT (ogg, "current chain ends at %" G_GINT64_FORMAT, searched);
chain->end_offset = searched;
gst_ogg_demux_read_end_chain (ogg, chain);
GST_LOG_OBJECT (ogg, "found begin at %" G_GINT64_FORMAT, next);
gst_ogg_demux_seek (ogg, next);
nextchain = gst_ogg_demux_read_chain (ogg);
if (searched < end && nextchain != NULL) {
ret = gst_ogg_demux_bisect_forward_serialno (ogg, next, ogg->offset,
end, nextchain, m + 1);
if (ret == OV_EREAD) {
GST_LOG_OBJECT (ogg, "OV_READ");
return OV_EREAD;
}
}
g_array_insert_val (ogg->chains, 0, chain);
return 0;
}
/* read a chain from the ogg file. This code will
* read all BOS pages and will create and return a GstOggChain
* structure with the results.
*
* This function will also read N pages from each stream in the
* chain and submit them to the decoders. When the decoder has
* decoded the first buffer, we know the timestamp of the first
* page in the chain.
*/
static GstOggChain *
gst_ogg_demux_read_chain (GstOggDemux * ogg)
{
GstOggChain *chain = NULL;
gint64 offset = ogg->offset;
ogg_page op;
gboolean done;
gint i;
GST_LOG_OBJECT (ogg, "reading chain at %" G_GINT64_FORMAT, offset);
/* first read the BOS pages, do typefind on them, create
* the decoders, send data to the decoders. */
while (TRUE) {
GstOggPad *pad;
glong serial;
gint ret;
ret = gst_ogg_demux_get_next_page (ogg, &op, -1);
if (ret < 0 || !ogg_page_bos (&op))
break;
if (chain == NULL) {
chain = gst_ogg_chain_new (ogg);
chain->offset = offset;
}
serial = ogg_page_serialno (&op);
if (gst_ogg_chain_get_stream (chain, serial) != NULL) {
GST_WARNING_OBJECT (ogg, "found serial %08x BOS page twice, ignoring",
serial);
continue;
}
pad = gst_ogg_chain_new_stream (chain, serial);
gst_ogg_pad_submit_page (pad, &op);
}
if (chain == NULL) {
GST_WARNING_OBJECT (ogg, "failed to read chain");
return NULL;
}
chain->have_bos = TRUE;
GST_LOG_OBJECT (ogg, "read bos pages, init decoder now");
/* now read pages until we receive a buffer from each of the
* stream decoders, this will tell us the timestamp of the
* first packet in the chain then */
/* save the offset to the first non bos page in the chain: if searching for
* pad->first_time we read past the end of the chain, we'll seek back to this
* position
*/
offset = ogg->offset;
done = FALSE;
while (!done) {
glong serial;
gboolean known_serial = FALSE;
gint ret;
serial = ogg_page_serialno (&op);
done = TRUE;
for (i = 0; i < chain->streams->len; i++) {
GstOggPad *pad = g_array_index (chain->streams, GstOggPad *, i);
if (pad->serialno == serial) {
known_serial = TRUE;
if (!pad->is_skeleton && pad->start_time == -1 && ogg_page_eos (&op)) {
/* got EOS on a pad before we could find its start_time.
* We have no chance of finding a start_time for every pad so
* stop searching for the other start_time(s).
*/
done = TRUE;
break;
}
gst_ogg_pad_submit_page (pad, &op);
}
/* the timestamp will be filled in when we submit the pages */
done &= (pad->start_time != GST_CLOCK_TIME_NONE);
GST_LOG_OBJECT (ogg, "done %08x now %d", serial, done);
}
/* we read a page not belonging to the current chain: seek back to the
* beginning of the chain
*/
if (!known_serial) {
gst_ogg_demux_seek (ogg, offset);
break;
}
if (!done) {
ret = gst_ogg_demux_get_next_page (ogg, &op, -1);
if (ret < 0)
break;
}
}
GST_LOG_OBJECT (ogg, "done reading chain");
/* now we can fill in the missing info using queries */
for (i = 0; i < chain->streams->len; i++) {
GstOggPad *pad = g_array_index (chain->streams, GstOggPad *, i);
GstFormat target;
if (pad->is_skeleton)
continue;
GST_LOG_OBJECT (ogg, "convert first granule %" G_GUINT64_FORMAT " to time ",
pad->first_granule);
target = GST_FORMAT_TIME;
if (!gst_ogg_pad_query_convert (pad,
GST_FORMAT_DEFAULT, pad->first_granule, &target,
(gint64 *) & pad->first_time)) {
GST_WARNING_OBJECT (ogg, "could not convert granulepos to time");
} else {
GST_LOG_OBJECT (ogg, "converted to first time %" GST_TIME_FORMAT,
GST_TIME_ARGS (pad->first_time));
}
pad->mode = GST_OGG_PAD_MODE_STREAMING;
}
return chain;
}
/* read the last pages from the ogg stream to get the final
* page end_offsets.
*/
static gint
gst_ogg_demux_read_end_chain (GstOggDemux * ogg, GstOggChain * chain)
{
gint64 begin = chain->end_offset;
gint64 end = begin;
gint64 last_granule = -1;
GstOggPad *last_pad = NULL;
GstFormat target;
gint64 ret;
gboolean done = FALSE;
ogg_page og;
gint i;
while (!done) {
begin -= CHUNKSIZE;
if (begin < 0)
begin = 0;
gst_ogg_demux_seek (ogg, begin);
/* now continue reading until we run out of data, if we find a page
* start, we save it. It might not be the final page as there could be
* another page after this one. */
while (ogg->offset < end) {
ret = gst_ogg_demux_get_next_page (ogg, &og, end - ogg->offset);
if (ret == OV_EREAD)
return OV_EREAD;
if (ret < 0) {
break;
} else {
for (i = 0; i < chain->streams->len; i++) {
GstOggPad *pad = g_array_index (chain->streams, GstOggPad *, i);
if (pad->is_skeleton)
continue;
if (pad->serialno == ogg_page_serialno (&og)) {
gint64 granulepos = ogg_page_granulepos (&og);
if (last_granule < granulepos) {
last_granule = granulepos;
last_pad = pad;
}
done = TRUE;
break;
}
}
}
}
}
target = GST_FORMAT_TIME;
if (last_granule == -1 || !gst_ogg_pad_query_convert (last_pad,
GST_FORMAT_DEFAULT, last_granule, &target,
(gint64 *) & chain->segment_stop)) {
GST_WARNING_OBJECT (ogg, "could not convert granulepos to time");
chain->segment_stop = GST_CLOCK_TIME_NONE;
}
return 0;
}
/* find a pad with a given serial number
*/
static GstOggPad *
gst_ogg_demux_find_pad (GstOggDemux * ogg, int serialno)
{
GstOggPad *pad;
gint i;
/* first look in building chain if any */
if (ogg->building_chain) {
pad = gst_ogg_chain_get_stream (ogg->building_chain, serialno);
if (pad)
return pad;
}
/* then look in current chain if any */
if (ogg->current_chain) {
pad = gst_ogg_chain_get_stream (ogg->current_chain, serialno);
if (pad)
return pad;
}
for (i = 0; i < ogg->chains->len; i++) {
GstOggChain *chain = g_array_index (ogg->chains, GstOggChain *, i);
pad = gst_ogg_chain_get_stream (chain, serialno);
if (pad)
return pad;
}
return NULL;
}
/* find a chain with a given serial number
*/
static GstOggChain *
gst_ogg_demux_find_chain (GstOggDemux * ogg, int serialno)
{
GstOggPad *pad;
pad = gst_ogg_demux_find_pad (ogg, serialno);
if (pad) {
return pad->chain;
}
return NULL;
}
static gboolean
gst_ogg_demux_collect_chain_info (GstOggDemux * ogg, GstOggChain * chain)
{
gint i;
chain->total_time = GST_CLOCK_TIME_NONE;
chain->segment_start = G_MAXINT64;
for (i = 0; i < chain->streams->len; i++) {
GstOggPad *pad = g_array_index (chain->streams, GstOggPad *, i);
if (pad->is_skeleton)
continue;
/* can do this if the pad start time is not defined */
if (pad->start_time == GST_CLOCK_TIME_NONE)
goto no_start_time;
chain->segment_start = MIN (chain->segment_start, pad->start_time);
}
if (chain->segment_stop != GST_CLOCK_TIME_NONE)
chain->total_time = chain->segment_stop - chain->segment_start;
return TRUE;
/* ERROR */
no_start_time:
{
chain->total_time = GST_CLOCK_TIME_NONE;
chain->segment_start = GST_CLOCK_TIME_NONE;
chain->segment_stop = GST_CLOCK_TIME_NONE;
chain->begin_time = GST_CLOCK_TIME_NONE;
return FALSE;
}
}
static void
gst_ogg_demux_collect_info (GstOggDemux * ogg)
{
gint i;
/* collect all info */
ogg->total_time = 0;
for (i = 0; i < ogg->chains->len; i++) {
GstOggChain *chain = g_array_index (ogg->chains, GstOggChain *, i);
chain->begin_time = ogg->total_time;
gst_ogg_demux_collect_chain_info (ogg, chain);
ogg->total_time += chain->total_time;
}
gst_segment_set_duration (&ogg->segment, GST_FORMAT_TIME, ogg->total_time);
}
/* find all the chains in the ogg file, this reads the first and
* last page of the ogg stream, if they match then the ogg file has
* just one chain, else we do a binary search for all chains.
*/
static gboolean
gst_ogg_demux_find_chains (GstOggDemux * ogg)
{
ogg_page og;
GstPad *peer;
GstFormat format;
gboolean res;
gulong serialno;
GstOggChain *chain;
/* get peer to figure out length */
if ((peer = gst_pad_get_peer (ogg->sinkpad)) == NULL)
goto no_peer;
/* find length to read last page, we store this for later use. */
format = GST_FORMAT_BYTES;
res = gst_pad_query_duration (peer, &format, &ogg->length);
gst_object_unref (peer);
if (!res || ogg->length <= 0)
goto no_length;
GST_DEBUG_OBJECT (ogg, "file length %" G_GINT64_FORMAT, ogg->length);
/* read chain from offset 0, this is the first chain of the
* ogg file. */
gst_ogg_demux_seek (ogg, 0);
chain = gst_ogg_demux_read_chain (ogg);
if (chain == NULL)
goto no_first_chain;
/* read page from end offset, we use this page to check if its serial
* number is contained in the first chain. If this is the case then
* this ogg is not a chained ogg and we can skip the scanning. */
gst_ogg_demux_seek (ogg, ogg->length);
gst_ogg_demux_get_prev_page (ogg, &og);
serialno = ogg_page_serialno (&og);
if (!gst_ogg_chain_has_stream (chain, serialno)) {
/* the last page is not in the first stream, this means we should
* find all the chains in this chained ogg. */
gst_ogg_demux_bisect_forward_serialno (ogg, 0, 0, ogg->length, chain, 0);
} else {
/* we still call this function here but with an empty range so that
* we can reuse the setup code in this routine. */
gst_ogg_demux_bisect_forward_serialno (ogg, 0, ogg->length, ogg->length,
chain, 0);
}
gst_ogg_demux_collect_info (ogg);
/* dump our chains and streams */
gst_ogg_print (ogg);
return TRUE;
/*** error cases ***/
no_peer:
{
GST_DEBUG_OBJECT (ogg, "we don't have a peer");
return FALSE;
}
no_length:
{
GST_DEBUG_OBJECT (ogg, "can't get file length");
return FALSE;
}
no_first_chain:
{
GST_DEBUG_OBJECT (ogg, "can't get first chain");
return FALSE;
}
}
/* streaming mode, receive a buffer, parse it, create pads for
* the serialno, submit pages and packets to the oggpads
*/
static GstFlowReturn
gst_ogg_demux_chain (GstPad * pad, GstBuffer * buffer)
{
GstOggDemux *ogg;
gint ret = -1;
GstFlowReturn result = GST_FLOW_OK;
guint serialno;
ogg = GST_OGG_DEMUX (GST_OBJECT_PARENT (pad));
GST_DEBUG_OBJECT (ogg, "chain");
gst_ogg_demux_submit_buffer (ogg, buffer);
while (ret != 0 && result == GST_FLOW_OK) {
ogg_page page;
ret = ogg_sync_pageout (&ogg->sync, &page);
if (ret == 0)
/* need more data */
break;
if (ret == -1) {
/* discontinuity in the pages */
} else {
GstOggPad *pad;
gint64 granule;
serialno = ogg_page_serialno (&page);
granule = ogg_page_granulepos (&page);
GST_LOG_OBJECT (ogg,
"processing ogg page (serial %08x, pageno %ld, granulepos %"
G_GINT64_FORMAT ", bos %d)",
serialno, ogg_page_pageno (&page), granule, ogg_page_bos (&page));
if (ogg_page_bos (&page)) {
GstOggChain *chain;
/* first page */
/* see if we know about the chain already */
chain = gst_ogg_demux_find_chain (ogg, serialno);
if (chain) {
/* we do, activate it as it means we have a non-header */
gst_ogg_demux_activate_chain (ogg, chain, NULL);
pad = gst_ogg_demux_find_pad (ogg, serialno);
} else {
GstClockTime chain_time;
GstOggChain *current_chain;
gint64 current_time;
/* this can only happen in non-seekabe mode */
if (ogg->seekable)
goto unknown_chain;
current_chain = ogg->current_chain;
current_time = ogg->segment.last_stop;
if (current_chain) {
GstClockTime duration;
/* this was the duration of the previous chain */
duration = current_time - current_chain->segment_start;
/* the new chain time starts at duration + begin_time */
chain_time = duration + current_chain->begin_time;
/* remove existing pads */
gst_ogg_demux_deactivate_current_chain (ogg);
} else {
/* non previous chain, start at configured current time */
chain_time = current_time;
}
if (ogg->building_chain == NULL) {
GstOggChain *newchain;
newchain = gst_ogg_chain_new (ogg);
newchain->offset = 0;
/* set new chain begin time aligned with end time of old chain */
newchain->begin_time = chain_time;
GST_DEBUG_OBJECT (ogg, "new chain, begin time %" GST_TIME_FORMAT,
GST_TIME_ARGS (chain_time));
/* and this is the one we are building now */
ogg->building_chain = newchain;
}
pad = gst_ogg_chain_new_stream (ogg->building_chain, serialno);
}
} else {
pad = gst_ogg_demux_find_pad (ogg, serialno);
}
if (pad) {
result = gst_ogg_pad_submit_page (pad, &page);
} else {
/* no pad, this is pretty fatal. This means an ogg page without bos
* has been seen for this serialno. could just ignore it too... */
goto unknown_pad;
}
}
}
return result;
unknown_chain:
{
GST_ELEMENT_ERROR (ogg, STREAM, DECODE,
(NULL), ("unknown ogg chain for serial %08x detected", serialno));
gst_ogg_demux_send_event (ogg, gst_event_new_eos ());
return GST_FLOW_ERROR;
}
unknown_pad:
{
GST_ELEMENT_ERROR (ogg, STREAM, DECODE,
(NULL), ("unknown ogg pad for serial %08x detected", serialno));
gst_ogg_demux_send_event (ogg, gst_event_new_eos ());
return GST_FLOW_ERROR;
}
}
static void
gst_ogg_demux_send_event (GstOggDemux * ogg, GstEvent * event)
{
GstOggChain *chain = ogg->current_chain;
if (chain) {
gint i;
for (i = 0; i < chain->streams->len; i++) {
GstOggPad *pad = g_array_index (chain->streams, GstOggPad *, i);
gst_event_ref (event);
GST_DEBUG_OBJECT (ogg, "Pushing event on pad %p", pad);
gst_pad_push_event (GST_PAD (pad), event);
}
}
gst_event_unref (event);
}
static GstFlowReturn
gst_ogg_demux_combine_flows (GstOggDemux * ogg, GstOggPad * pad,
GstFlowReturn ret)
{
GstOggChain *chain;
/* store the value */
pad->last_ret = ret;
/* if it's success we can return the value right away */
if (GST_FLOW_IS_SUCCESS (ret))
goto done;
/* any other error that is not-linked can be returned right
* away */
if (ret != GST_FLOW_NOT_LINKED)
goto done;
/* only return NOT_LINKED if all other pads returned NOT_LINKED */
chain = ogg->current_chain;
if (chain) {
gint i;
for (i = 0; i < chain->streams->len; i++) {
GstOggPad *opad = g_array_index (chain->streams, GstOggPad *, i);
ret = opad->last_ret;
/* some other return value (must be SUCCESS but we can return
* other values as well) */
if (ret != GST_FLOW_NOT_LINKED)
goto done;
}
/* if we get here, all other pads were unlinked and we return
* NOT_LINKED then */
}
done:
return ret;
}
/* random access code
*
* - first find all the chains and streams by scanning the file.
* - then get and chain buffers, just like the streaming case.
* - when seeking, we can use the chain info to perform the seek.
*/
static void
gst_ogg_demux_loop (GstOggPad * pad)
{
GstOggDemux *ogg;
GstFlowReturn ret;
GstBuffer *buffer;
GstEvent *event;
ogg = GST_OGG_DEMUX (GST_OBJECT_PARENT (pad));
if (ogg->need_chains) {
gboolean got_chains;
gboolean res;
/* this is the only place where we write chains and thus need to lock. */
GST_CHAIN_LOCK (ogg);
ogg->chain_error = GST_FLOW_OK;
got_chains = gst_ogg_demux_find_chains (ogg);
GST_CHAIN_UNLOCK (ogg);
if (!got_chains)
goto chain_read_failed;
ogg->need_chains = FALSE;
GST_OBJECT_LOCK (ogg);
ogg->running = TRUE;
event = ogg->event;
ogg->event = NULL;
GST_OBJECT_UNLOCK (ogg);
/* and seek to configured positions without FLUSH */
res = gst_ogg_demux_perform_seek (ogg, event);
if (event)
gst_event_unref (event);
if (!res)
goto seek_failed;
}
if (ogg->offset == ogg->length) {
GST_LOG_OBJECT (ogg, "no more data to pull %" G_GINT64_FORMAT
" == %" G_GINT64_FORMAT, ogg->offset, ogg->length);
goto eos;
}
GST_LOG_OBJECT (ogg, "pull data %" G_GINT64_FORMAT, ogg->offset);
ret = gst_pad_pull_range (ogg->sinkpad, ogg->offset, CHUNKSIZE, &buffer);
if (ret != GST_FLOW_OK) {
GST_LOG_OBJECT (ogg, "Failed pull_range");
goto pause;
}
ogg->offset += GST_BUFFER_SIZE (buffer);
ret = gst_ogg_demux_chain (ogg->sinkpad, buffer);
if (ret != GST_FLOW_OK) {
GST_LOG_OBJECT (ogg, "Failed demux_chain");
goto pause;
}
/* check for the end of the segment */
if (ogg->segment.stop != -1 && ogg->segment.last_stop != -1)
if (ogg->segment.last_stop > ogg->segment.stop)
goto eos;
return;
/* ERRORS */
chain_read_failed:
{
GST_ELEMENT_ERROR (ogg, STREAM, DEMUX, (NULL), ("could not read chains"));
ret = ogg->chain_error;
goto pause;
}
seek_failed:
{
GST_ELEMENT_ERROR (ogg, STREAM, DEMUX, (NULL),
("failed to start demuxing ogg"));
ret = GST_FLOW_ERROR;
goto pause;
}
eos:
{
ret = GST_FLOW_UNEXPECTED;
goto pause;
}
pause:
{
const gchar *reason = gst_flow_get_name (ret);
GST_LOG_OBJECT (ogg, "pausing task, reason %s", reason);
ogg->segment_running = FALSE;
gst_pad_pause_task (ogg->sinkpad);
if (GST_FLOW_IS_FATAL (ret) || ret == GST_FLOW_NOT_LINKED) {
if (ret == GST_FLOW_UNEXPECTED) {
/* perform EOS logic */
if (ogg->segment.flags & GST_SEEK_FLAG_SEGMENT) {
gint64 stop;
/* for segment playback we need to post when (in stream time)
* we stopped, this is either stop (when set) or the duration. */
if ((stop = ogg->segment.stop) == -1)
stop = ogg->segment.duration;
GST_LOG_OBJECT (ogg, "Sending segment done, at end of segment");
gst_element_post_message (GST_ELEMENT (ogg),
gst_message_new_segment_done (GST_OBJECT (ogg), GST_FORMAT_TIME,
stop));
} else {
/* normal playback, send EOS to all linked pads */
GST_LOG_OBJECT (ogg, "Sending EOS, at end of stream");
gst_ogg_demux_send_event (ogg, gst_event_new_eos ());
}
} else {
GST_ELEMENT_ERROR (ogg, STREAM, FAILED,
(_("Internal data stream error.")),
("stream stopped, reason %s", reason));
gst_ogg_demux_send_event (ogg, gst_event_new_eos ());
}
}
return;
}
}
static void
gst_ogg_demux_clear_chains (GstOggDemux * ogg)
{
gint i;
gst_ogg_demux_deactivate_current_chain (ogg);
GST_CHAIN_LOCK (ogg);
for (i = 0; i < ogg->chains->len; i++) {
GstOggChain *chain = g_array_index (ogg->chains, GstOggChain *, i);
gst_ogg_chain_free (chain);
}
ogg->chains = g_array_set_size (ogg->chains, 0);
GST_CHAIN_UNLOCK (ogg);
}
/* this function is called when the pad is activated and should start
* processing data.
*
* We check if we can do random access to decide if we work push or
* pull based.
*/
static gboolean
gst_ogg_demux_sink_activate (GstPad * sinkpad)
{
if (gst_pad_check_pull_range (sinkpad)) {
return gst_pad_activate_pull (sinkpad, TRUE);
} else {
return gst_pad_activate_push (sinkpad, TRUE);
}
}
/* this function gets called when we activate ourselves in push mode.
* We cannot seek (ourselves) in the stream */
static gboolean
gst_ogg_demux_sink_activate_push (GstPad * sinkpad, gboolean active)
{
GstOggDemux *ogg;
ogg = GST_OGG_DEMUX (GST_OBJECT_PARENT (sinkpad));
ogg->seekable = FALSE;
return TRUE;
}
/* this function gets called when we activate ourselves in pull mode.
* We can perform random access to the resource and we start a task
* to start reading */
static gboolean
gst_ogg_demux_sink_activate_pull (GstPad * sinkpad, gboolean active)
{
GstOggDemux *ogg;
ogg = GST_OGG_DEMUX (GST_OBJECT_PARENT (sinkpad));
if (active) {
ogg->need_chains = TRUE;
ogg->seekable = TRUE;
return gst_pad_start_task (sinkpad, (GstTaskFunction) gst_ogg_demux_loop,
sinkpad);
} else {
return gst_pad_stop_task (sinkpad);
}
}
static GstStateChangeReturn
gst_ogg_demux_change_state (GstElement * element, GstStateChange transition)
{
GstOggDemux *ogg;
GstStateChangeReturn result = GST_STATE_CHANGE_FAILURE;
ogg = GST_OGG_DEMUX (element);
switch (transition) {
case GST_STATE_CHANGE_NULL_TO_READY:
ogg->basetime = 0;
ogg->have_fishead = FALSE;
ogg_sync_init (&ogg->sync);
break;
case GST_STATE_CHANGE_READY_TO_PAUSED:
ogg_sync_reset (&ogg->sync);
ogg->current_granule = -1;
ogg->running = FALSE;
ogg->segment_running = FALSE;
gst_segment_init (&ogg->segment, GST_FORMAT_TIME);
break;
case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
break;
default:
break;
}
result = parent_class->change_state (element, transition);
switch (transition) {
case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
break;
case GST_STATE_CHANGE_PAUSED_TO_READY:
gst_ogg_demux_clear_chains (ogg);
GST_OBJECT_LOCK (ogg);
ogg->running = FALSE;
ogg->segment_running = FALSE;
ogg->have_fishead = FALSE;
GST_OBJECT_UNLOCK (ogg);
break;
case GST_STATE_CHANGE_READY_TO_NULL:
ogg_sync_clear (&ogg->sync);
break;
default:
break;
}
return result;
}
static GstClockTime
gst_annodex_granule_to_time (gint64 granulepos, gint64 granulerate_n,
gint64 granulerate_d, guint8 granuleshift)
{
gint64 keyindex, keyoffset;
gint64 granulerate;
GstClockTime res;
if (granulepos == 0 || granulerate_n == 0 || granulerate_d == 0)
return 0;
if (granuleshift != 0) {
keyindex = granulepos >> granuleshift;
keyoffset = granulepos - (keyindex << granuleshift);
granulepos = keyindex + keyoffset;
}
/* GST_SECOND / (granulerate_n / granulerate_d) */
granulerate = gst_util_uint64_scale (GST_SECOND,
granulerate_d, granulerate_n);
res = gst_util_uint64_scale (granulepos, granulerate, 1);
return res;
}
gboolean
gst_ogg_demux_plugin_init (GstPlugin * plugin)
{
GST_DEBUG_CATEGORY_INIT (gst_ogg_demux_debug, "oggdemux", 0, "ogg demuxer");
GST_DEBUG_CATEGORY_INIT (gst_ogg_demux_setup_debug, "oggdemux_setup", 0,
"ogg demuxer setup stage when parsing pipeline");
#if ENABLE_NLS
GST_DEBUG ("binding text domain %s to locale dir %s", GETTEXT_PACKAGE,
LOCALEDIR);
bindtextdomain (GETTEXT_PACKAGE, LOCALEDIR);
#endif
return gst_element_register (plugin, "oggdemux", GST_RANK_PRIMARY,
GST_TYPE_OGG_DEMUX);
}
/* prints all info about the element */
#undef GST_CAT_DEFAULT
#define GST_CAT_DEFAULT gst_ogg_demux_setup_debug
#ifdef GST_DISABLE_GST_DEBUG
static void
gst_ogg_print (GstOggDemux * ogg)
{
/* NOP */
}
#else /* !GST_DISABLE_GST_DEBUG */
static void
gst_ogg_print (GstOggDemux * ogg)
{
guint j, i;
GST_INFO_OBJECT (ogg, "%u chains", ogg->chains->len);
GST_INFO_OBJECT (ogg, " total time: %" GST_TIME_FORMAT,
GST_TIME_ARGS (ogg->total_time));
for (i = 0; i < ogg->chains->len; i++) {
GstOggChain *chain = g_array_index (ogg->chains, GstOggChain *, i);
GST_INFO_OBJECT (ogg, " chain %d (%u streams):", i, chain->streams->len);
GST_INFO_OBJECT (ogg, " offset: %" G_GINT64_FORMAT " - %" G_GINT64_FORMAT,
chain->offset, chain->end_offset);
GST_INFO_OBJECT (ogg, " begin time: %" GST_TIME_FORMAT,
GST_TIME_ARGS (chain->begin_time));
GST_INFO_OBJECT (ogg, " total time: %" GST_TIME_FORMAT,
GST_TIME_ARGS (chain->total_time));
GST_INFO_OBJECT (ogg, " segment start: %" GST_TIME_FORMAT,
GST_TIME_ARGS (chain->segment_start));
GST_INFO_OBJECT (ogg, " segment stop: %" GST_TIME_FORMAT,
GST_TIME_ARGS (chain->segment_stop));
for (j = 0; j < chain->streams->len; j++) {
GstOggPad *stream = g_array_index (chain->streams, GstOggPad *, j);
GST_INFO_OBJECT (ogg, " stream %08x:", stream->serialno);
GST_INFO_OBJECT (ogg, " start time: %" GST_TIME_FORMAT,
GST_TIME_ARGS (stream->start_time));
GST_INFO_OBJECT (ogg, " first granulepos: %" G_GINT64_FORMAT,
stream->first_granule);
GST_INFO_OBJECT (ogg, " first time: %" GST_TIME_FORMAT,
GST_TIME_ARGS (stream->first_time));
}
}
}
#endif /* GST_DISABLE_GST_DEBUG */
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