gstreamer/ext/ogg/gstoggdemux.c
Tim-Philipp Müller 12134979a2 oggdemux: post/send tags with the container-format tag
For this to work properly, theoradec and vorbisdec need to put
tag events received from upstream into the pending_events list
so they get pushed out after any newsegment event, not before.
2009-06-14 22:13:41 +01:00

3424 lines
93 KiB
C

/* 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.
*/
/**
* SECTION:element-oggdemux
* @see_also: <link linkend="gst-plugins-base-plugins-oggmux">oggmux</link>
*
* This element demuxes ogg files into their encoded audio and video components.
*
* <refsect2>
* <title>Example pipelines</title>
* |[
* gst-launch -v filesrc location=test.ogg ! oggdemux ! vorbisdec ! audioconvert ! alsasink
* ]| Decodes the vorbis audio stored inside an ogg container.
* </refsect2>
*
* Last reviewed on 2006-12-30 (0.10.5)
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <string.h>
#include <gst/gst-i18n-plugin.h>
#include <gst/base/gsttypefindhelper.h>
#include "gstoggdemux.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 Taymans <wim@fluendo.com>");
#define CHUNKSIZE (8500) /* this is out of vorbisfile */
#define SKELETON_FISHEAD_SIZE 64
#define SKELETON_FISBONE_MIN_SIZE 52
#define GST_FLOW_LIMIT GST_FLOW_CUSTOM_ERROR
#define GST_CHAIN_LOCK(ogg) g_mutex_lock((ogg)->chain_lock)
#define GST_CHAIN_UNLOCK(ogg) g_mutex_unlock((ogg)->chain_lock)
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
static ogg_page *
gst_ogg_page_copy (ogg_page * page)
{
ogg_page *p = g_new0 (ogg_page, 1);
/* make a copy of the page */
p->header = g_memdup (page->header, page->header_len);
p->header_len = page->header_len;
p->body = g_memdup (page->body, page->body_len);
p->body_len = page->body_len;
return p;
}
static void
gst_ogg_page_free (ogg_page * page)
{
g_free (page->header);
g_free (page->body);
g_free (page);
}
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 void gst_ogg_chain_mark_discont (GstOggChain * chain);
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);
G_DEFINE_TYPE (GstOggPad, gst_ogg_pad, GST_TYPE_PAD);
static void
gst_ogg_pad_class_init (GstOggPadClass * klass)
{
GObjectClass *gobject_class;
gobject_class = (GObjectClass *) 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->continued = NULL;
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;
/* clear continued pages */
g_list_foreach (pad->continued, (GFunc) gst_ogg_page_free, NULL);
g_list_free (pad->continued);
pad->continued = NULL;
ogg_stream_reset (&pad->stream);
G_OBJECT_CLASS (gst_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 (gst_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,
GST_QUERY_SEEKING,
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;
gint64 total_time;
gst_query_parse_duration (query, &format, NULL);
/* can only get position in time */
if (format != GST_FORMAT_TIME)
goto wrong_format;
if (ogg->seekable) {
/* we must return the total seekable length */
total_time = ogg->total_time;
} else {
/* in non-seek mode we can answer the query and we must return -1 */
total_time = -1;
}
gst_query_set_duration (query, GST_FORMAT_TIME, 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);
GST_DEBUG_OBJECT (pad, "doing reset");
/* clear continued pages */
g_list_foreach (pad->continued, (GFunc) gst_ogg_page_free, NULL);
g_list_free (pad->continued);
pad->continued = NULL;
pad->last_ret = GST_FLOW_OK;
}
/* 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->prestime = gst_util_uint64_scale (GST_SECOND, prestime_n, prestime_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 ", prestime: %" GST_TIME_FORMAT ")",
GST_TIME_ARGS (ogg->basetime), GST_TIME_ARGS (ogg->prestime));
}
/* 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)
{
GstOggDemux *ogg = pad->ogg;
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 = ogg->prestime - ogg->basetime;
GST_INFO_OBJECT (pad->ogg, "skeleton fisbone parsed "
"(serialno: %08x 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_static_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_static_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);
}
}
}
}
gst_plugin_feature_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 %p does not have elem_pad, no decoder ?", pad);
return GST_FLOW_ERROR;
}
decoder_error:
{
GST_WARNING_OBJECT (ogg, "internal decoder error");
return ret;
}
}
/* queue data, basically takes the packet, puts it in a buffer and store the
* buffer in the headers list.
*/
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)) {
gint64 chain_start = 0;
if (chain->segment_start != GST_CLOCK_TIME_NONE)
chain_start = chain->segment_start;
current_time = current_time - chain_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;
}
}
if (granule != -1 && memcmp (packet->packet, "KW-DIRAC", 8) == 0) {
return GST_FLOW_OK;
}
/* 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, we have enough info
* when all streams have a valid start time. */
if (gst_ogg_demux_collect_chain_info (ogg, chain)) {
GstEvent *event;
GST_DEBUG_OBJECT (ogg, "segment_start: %" GST_TIME_FORMAT,
GST_TIME_ARGS (chain->segment_start));
GST_DEBUG_OBJECT (ogg, "segment_stop: %" GST_TIME_FORMAT,
GST_TIME_ARGS (chain->segment_stop));
GST_DEBUG_OBJECT (ogg, "segment_time: %" GST_TIME_FORMAT,
GST_TIME_ARGS (chain->begin_time));
/* create the newsegment event we are going to send out */
event = gst_event_new_new_segment (FALSE, ogg->segment.rate,
GST_FORMAT_TIME, chain->segment_start, chain->segment_stop,
chain->begin_time);
gst_event_set_seqnum (event, ogg->seqnum);
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;
}
/* flush at most @npackets from the stream layer. All packets if
* @npackets is 0;
*/
static GstFlowReturn
gst_ogg_pad_stream_out (GstOggPad * pad, gint npackets)
{
GstFlowReturn result = GST_FLOW_OK;
gboolean done = FALSE;
GstOggDemux *ogg;
ogg = pad->ogg;
while (!done) {
int ret;
ogg_packet packet;
ret = ogg_stream_packetout (&pad->stream, &packet);
switch (ret) {
case 0:
GST_LOG_OBJECT (ogg, "packetout done");
done = TRUE;
break;
case -1:
GST_LOG_OBJECT (ogg, "packetout discont");
gst_ogg_chain_mark_discont (pad->chain);
break;
case 1:
GST_LOG_OBJECT (ogg, "packetout gave packet of size %ld", packet.bytes);
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;
}
if (npackets > 0) {
npackets--;
done = (npackets == 0);
}
}
return result;
/* ERRORS */
could_not_submit:
{
GST_WARNING_OBJECT (ogg,
"could not submit packet for stream %08x, error: %d", pad->serialno,
result);
gst_ogg_pad_reset (pad);
return result;
}
}
/* 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)
{
GstFlowReturn result = GST_FLOW_OK;
GstOggDemux *ogg;
gboolean continued = FALSE;
ogg = pad->ogg;
/* for negative rates we read pages backwards and must therefore be carefull
* with continued pages */
if (ogg->segment.rate < 0.0) {
gint npackets;
continued = ogg_page_continued (page);
/* number of completed packets in the page */
npackets = ogg_page_packets (page);
if (!continued) {
/* page is not continued so it contains at least one packet start. It's
* possible that no packet ends on this page (npackets == 0). In that
* case, the next (continued) page(s) we kept contain the remainder of the
* packets. We mark npackets=1 to make us start decoding the pages in the
* remainder of the algorithm. */
if (npackets == 0)
npackets = 1;
}
GST_LOG_OBJECT (ogg, "continued: %d, %d packets", continued, npackets);
if (npackets == 0) {
GST_LOG_OBJECT (ogg, "no decodable packets, we need a previous page");
goto done;
}
}
if (ogg_stream_pagein (&pad->stream, page) != 0)
goto choked;
/* flush all packets in the stream layer, this might not give a packet if
* the page had no packets finishing on the page (npackets == 0). */
result = gst_ogg_pad_stream_out (pad, 0);
if (pad->continued) {
ogg_packet packet;
/* now send the continued pages to the stream layer */
while (pad->continued) {
ogg_page *p = (ogg_page *) pad->continued->data;
GST_LOG_OBJECT (ogg, "submitting continued page %p", p);
if (ogg_stream_pagein (&pad->stream, p) != 0)
goto choked;
pad->continued = g_list_delete_link (pad->continued, pad->continued);
/* free the page */
gst_ogg_page_free (p);
}
GST_LOG_OBJECT (ogg, "flushing last continued packet");
/* flush 1 continued packet in the stream layer */
result = gst_ogg_pad_stream_out (pad, 1);
/* flush all remaining packets, we pushed them in the previous round.
* We don't use _reset() because we still want to get the discont when
* we submit a next page. */
while (ogg_stream_packetout (&pad->stream, &packet) != 0);
}
done:
/* keep continued pages (only in reverse mode) */
if (continued) {
ogg_page *p = gst_ogg_page_copy (page);
GST_LOG_OBJECT (ogg, "keeping continued page %p", p);
pad->continued = g_list_prepend (pad->continued, p);
}
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;
}
}
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 void
gst_ogg_chain_reset (GstOggChain * chain)
{
gint i;
for (i = 0; i < chain->streams->len; i++) {
GstOggPad *pad = g_array_index (chain->streams, GstOggPad *, i);
gst_ogg_pad_reset (pad);
}
}
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 %08lx 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 (ret);
GST_PAD_DIRECTION (ret) = GST_PAD_SRC;
ret->discont = TRUE;
ret->chain = chain;
ret->ogg = chain->ogg;
ret->serialno = serialno;
if (ogg_stream_init (&ret->stream, serialno) != 0)
goto init_failed;
name = g_strdup_printf ("serial_%08lx", serialno);
gst_object_set_name (GST_OBJECT (ret), name);
g_free (name);
/* FIXME: either do something with it or remove it */
list = gst_tag_list_new ();
gst_tag_list_add (list, GST_TAG_MERGE_REPLACE, GST_TAG_SERIAL, serialno,
NULL);
gst_tag_list_free (list);
GST_DEBUG_OBJECT (chain->ogg,
"created new ogg src %p for stream with serial %08lx", ret, serialno);
g_array_append_val (chain->streams, ret);
return ret;
/* ERRORS */
init_failed:
{
GST_ERROR ("Could not initialize ogg_stream struct for serial %08lx.",
serialno);
gst_object_unref (ret);
return NULL;
}
}
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 GstFlowReturn gst_ogg_demux_read_chain (GstOggDemux * ogg,
GstOggChain ** chain);
static GstFlowReturn 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 *));
ogg->newsegment = NULL;
}
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);
if (ogg->newsegment)
gst_event_unref (ogg->newsegment);
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:
{
GST_DEBUG_OBJECT (ogg, "got an EOS event");
res = gst_pad_event_default (pad, event);
if (ogg->current_chain == NULL) {
GST_ELEMENT_ERROR (ogg, STREAM, DEMUX, (NULL),
("can't get first chain"));
}
break;
}
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 GstFlowReturn
gst_ogg_demux_submit_buffer (GstOggDemux * ogg, GstBuffer * buffer)
{
gint size;
guint8 *data;
gchar *oggbuffer;
GstFlowReturn ret = GST_FLOW_OK;
size = GST_BUFFER_SIZE (buffer);
data = GST_BUFFER_DATA (buffer);
GST_DEBUG_OBJECT (ogg, "submitting %u bytes", size);
if (G_UNLIKELY (size == 0))
goto done;
oggbuffer = ogg_sync_buffer (&ogg->sync, size);
if (G_UNLIKELY (oggbuffer == NULL))
goto no_buffer;
memcpy (oggbuffer, data, size);
if (G_UNLIKELY (ogg_sync_wrote (&ogg->sync, size) < 0))
goto write_failed;
done:
gst_buffer_unref (buffer);
return ret;
/* ERRORS */
no_buffer:
{
GST_ELEMENT_ERROR (ogg, STREAM, DECODE,
(NULL), ("failed to get ogg sync buffer"));
ret = GST_FLOW_ERROR;
goto done;
}
write_failed:
{
GST_ELEMENT_ERROR (ogg, STREAM, DECODE,
(NULL), ("failed to write %d bytes to the sync buffer", size));
ret = GST_FLOW_ERROR;
goto done;
}
}
/* 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->read_offset = offset;
ogg_sync_reset (&ogg->sync);
}
/* read more data from the current offset and submit to
* the ogg sync layer.
*/
static GstFlowReturn
gst_ogg_demux_get_data (GstOggDemux * ogg, gint64 end_offset)
{
GstFlowReturn ret;
GstBuffer *buffer;
GST_LOG_OBJECT (ogg,
"get data %" G_GINT64_FORMAT " %" G_GINT64_FORMAT " %" G_GINT64_FORMAT,
ogg->read_offset, ogg->length, end_offset);
if (end_offset > 0 && ogg->read_offset >= end_offset)
goto boundary_reached;
if (ogg->read_offset == ogg->length)
goto eos;
ret = gst_pad_pull_range (ogg->sinkpad, ogg->read_offset, CHUNKSIZE, &buffer);
if (ret != GST_FLOW_OK)
goto error;
ogg->read_offset += GST_BUFFER_SIZE (buffer);
ret = gst_ogg_demux_submit_buffer (ogg, buffer);
return ret;
/* ERROR */
boundary_reached:
{
GST_LOG_OBJECT (ogg, "reached boundary");
return GST_FLOW_LIMIT;
}
eos:
{
GST_LOG_OBJECT (ogg, "reached EOS");
return GST_FLOW_UNEXPECTED;
}
error:
{
GST_WARNING_OBJECT (ogg, "got %d (%s) from pull range", ret,
gst_flow_get_name (ret));
return ret;
}
}
/* Read the next page from the current offset.
* boundary: number of bytes ahead we allow looking for;
* -1 if no boundary
*
* @offset will contain the offset the next page starts at when this function
* returns GST_FLOW_OK.
*
* GST_FLOW_UNEXPECTED is returned on EOS.
*
* GST_FLOW_LIMIT is returned when we did not find a page before the
* boundary. If @boundary is -1, this is never returned.
*
* Any other error returned while retrieving data from the peer is returned as
* is.
*/
static GstFlowReturn
gst_ogg_demux_get_next_page (GstOggDemux * ogg, ogg_page * og, gint64 boundary,
gint64 * offset)
{
gint64 end_offset = -1;
GstFlowReturn ret;
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 (end_offset > 0 && ogg->offset >= end_offset)
goto boundary_reached;
more = ogg_sync_pageseek (&ogg->sync, og);
GST_LOG_OBJECT (ogg, "pageseek gave %ld", more);
if (more < 0) {
/* skipped n bytes */
ogg->offset -= more;
GST_LOG_OBJECT (ogg, "skipped %ld bytes, offset %" G_GINT64_FORMAT, more,
ogg->offset);
} else if (more == 0) {
/* we need more data */
if (boundary == 0)
goto boundary_reached;
GST_LOG_OBJECT (ogg, "need more data");
ret = gst_ogg_demux_get_data (ogg, end_offset);
if (ret != GST_FLOW_OK)
break;
} else {
gint64 res_offset = ogg->offset;
/* got a page. Return the offset at the page beginning,
advance the internal offset past the page end */
if (offset)
*offset = res_offset;
ret = GST_FLOW_OK;
ogg->offset += more;
GST_LOG_OBJECT (ogg,
"got page at %" G_GINT64_FORMAT ", serial %08x, end at %"
G_GINT64_FORMAT ", granule %" G_GINT64_FORMAT, res_offset,
ogg_page_serialno (og), ogg->offset, ogg_page_granulepos (og));
break;
}
}
GST_LOG_OBJECT (ogg, "returning %d", ret);
return ret;
/* ERRORS */
boundary_reached:
{
GST_LOG_OBJECT (ogg,
"offset %" G_GINT64_FORMAT " >= end_offset %" G_GINT64_FORMAT,
ogg->offset, end_offset);
return GST_FLOW_LIMIT;
}
}
/* from the current offset, find the previous page, seeking backwards
* until we find the page.
*/
static GstFlowReturn
gst_ogg_demux_get_prev_page (GstOggDemux * ogg, ogg_page * og, gint64 * offset)
{
GstFlowReturn ret;
gint64 begin = ogg->offset;
gint64 end = begin;
gint64 cur_offset = -1;
GST_LOG_OBJECT (ogg, "getting page before %" G_GINT64_FORMAT, begin);
while (cur_offset == -1) {
begin -= CHUNKSIZE;
if (begin < 0)
begin = 0;
/* seek CHUNKSIZE back */
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) {
gint64 new_offset;
ret =
gst_ogg_demux_get_next_page (ogg, og, end - ogg->offset, &new_offset);
/* we hit the upper limit, offset contains the last page start */
if (ret == GST_FLOW_LIMIT) {
GST_LOG_OBJECT (ogg, "hit limit");
break;
}
/* something went wrong */
if (ret == GST_FLOW_UNEXPECTED) {
new_offset = 0;
GST_LOG_OBJECT (ogg, "got unexpected");
} else if (ret != GST_FLOW_OK) {
GST_LOG_OBJECT (ogg, "got error %d", ret);
return ret;
}
GST_LOG_OBJECT (ogg, "found page at %" G_GINT64_FORMAT, new_offset);
/* offset is next page start */
cur_offset = new_offset;
}
}
GST_LOG_OBJECT (ogg, "found previous page at %" G_GINT64_FORMAT, cur_offset);
/* we have the offset. Actually snork and hold the page now */
gst_ogg_demux_seek (ogg, cur_offset);
ret = gst_ogg_demux_get_next_page (ogg, og, -1, NULL);
if (ret != GST_FLOW_OK) {
GST_WARNING_OBJECT (ogg, "can't get last page at %" G_GINT64_FORMAT,
cur_offset);
/* this shouldn't be possible */
return ret;
}
if (offset)
*offset = cur_offset;
return ret;
}
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);
GstEvent *event;
if (pad->is_skeleton)
continue;
event = gst_event_new_eos ();
gst_event_set_seqnum (event, ogg->seqnum);
gst_pad_push_event (GST_PAD_CAST (pad), event);
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;
}
/* FIXME, should not be called with NULL */
if (chain != NULL) {
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);
if (pad->is_skeleton)
continue;
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));
}
}
/* after adding the new pads, remove the old pads */
gst_ogg_demux_deactivate_current_chain (ogg);
ogg->current_chain = chain;
/* we are finished now */
gst_element_no_more_pads (GST_ELEMENT (ogg));
/* FIXME, must be sent from the streaming thread */
if (event) {
gst_ogg_demux_send_event (ogg, event);
gst_element_found_tags (GST_ELEMENT_CAST (ogg),
gst_tag_list_new_full (GST_TAG_CONTAINER_FORMAT, "Ogg", NULL));
}
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, GstSegment * segment,
gboolean accurate, GstOggChain ** rchain)
{
guint64 position;
GstOggChain *chain = NULL;
gint64 begin, end;
gint64 begintime, endtime;
gint64 target;
gint64 best;
gint64 total;
gint64 result = 0;
GstFlowReturn ret;
gint i;
position = segment->last_stop;
/* 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 = begintime + chain->total_time;
target = position - total + begintime;
if (accurate) {
if (segment->rate > 0.0) {
/* FIXME, seek 2 seconds early to catch keyframes, better implement
* keyframe detection. */
if (target - 2 * GST_SECOND > begintime)
target = target - (gint64) 2 *GST_SECOND;
else
target = begintime;
} else {
if (target + GST_SECOND < endtime)
target = target + (gint64) GST_SECOND;
else
target = endtime;
}
}
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);
ret = gst_ogg_demux_get_next_page (ogg, &og, end - ogg->offset, &result);
GST_LOG_OBJECT (ogg, "looking for next page returned %" G_GINT64_FORMAT,
result);
if (ret == GST_FLOW_LIMIT) {
/* we hit the upper limit, go back a bit */
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 if (ret == GST_FLOW_OK) {
/* 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;
}
}
}
} else
goto seek_error;
}
}
GST_DEBUG_OBJECT (ogg, "seeking to %" G_GINT64_FORMAT, best);
gst_ogg_demux_seek (ogg, 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;
guint32 seqnum;
GstEvent *tevent;
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;
}
seqnum = gst_event_get_seqnum (event);
} else {
GST_DEBUG_OBJECT (ogg, "seek without event");
flags = 0;
rate = 1.0;
seqnum = gst_util_seqnum_next ();
}
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;
tevent = gst_event_new_flush_start ();
gst_event_set_seqnum (tevent, seqnum);
gst_event_ref (tevent);
gst_pad_push_event (ogg->sinkpad, tevent);
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_event_ref (tevent);
gst_pad_push_event (GST_PAD (pad), tevent);
}
}
GST_CHAIN_UNLOCK (ogg);
gst_event_unref (tevent);
} 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;
gint64 chain_start = 0;
if (chain->segment_start != GST_CLOCK_TIME_NONE)
chain_start = chain->segment_start;
newseg = gst_event_new_new_segment (TRUE, ogg->segment.rate,
GST_FORMAT_TIME, ogg->segment.start + chain_start,
ogg->segment.last_stop + chain_start, ogg->segment.time);
/* set the seqnum of the running segment */
gst_event_set_seqnum (newseg, ogg->seqnum);
/* send segment on old chain, FIXME, must be sent from streaming thread. */
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. */
if (flush) {
tevent = gst_event_new_flush_stop ();
gst_event_set_seqnum (tevent, seqnum);
gst_pad_push_event (ogg->sinkpad, tevent);
}
{
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);
gst_ogg_chain_reset (chain);
}
}
/* for reverse we will already seek accurately */
res = gst_ogg_demux_do_seek (ogg, &ogg->segment, accurate, &chain);
/* seek failed, make sure we continue the current chain */
if (!res) {
GST_DEBUG_OBJECT (ogg, "seek failed");
chain = ogg->current_chain;
} else {
GST_DEBUG_OBJECT (ogg, "seek success");
}
if (!chain)
goto no_chain;
/* now we have a new position, prepare for streaming again */
{
GstEvent *event;
gint64 stop;
gint64 start;
gint64 last_stop, begin_time;
/* we have to send the flush to the old chain, not the new one */
if (flush) {
tevent = gst_event_new_flush_stop ();
gst_event_set_seqnum (tevent, seqnum);
gst_ogg_demux_send_event (ogg, tevent);
}
/* we need this to see how far inside the chain we need to start */
if (chain->begin_time != GST_CLOCK_TIME_NONE)
begin_time = chain->begin_time;
else
begin_time = 0;
/* segment.start gives the start over all chains, we calculate the amount
* of time into this chain we need to start */
start = ogg->segment.start - begin_time;
if (chain->segment_start != GST_CLOCK_TIME_NONE)
start += chain->segment_start;
if ((stop = ogg->segment.stop) == -1)
stop = ogg->segment.duration;
/* segment.stop gives the stop time over all chains, calculate the amount of
* time we need to stop in this chain */
if (stop != -1) {
if (stop > begin_time)
stop -= begin_time;
else
stop = 0;
stop += chain->segment_start;
/* we must stop when this chain ends and switch to the next chain to play
* the remainder of the segment. */
stop = MIN (stop, chain->segment_stop);
}
last_stop = ogg->segment.last_stop - begin_time;
if (chain->segment_start != GST_CLOCK_TIME_NONE)
last_stop += chain->segment_start;
/* create the segment event we are going to send out */
if (ogg->segment.rate >= 0.0)
event = gst_event_new_new_segment (FALSE, ogg->segment.rate,
ogg->segment.format, last_stop, stop, ogg->segment.time);
else
event = gst_event_new_new_segment (FALSE, ogg->segment.rate,
ogg->segment.format, start, last_stop, ogg->segment.time);
gst_event_set_seqnum (event, seqnum);
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);
/* This event should be sent from the streaming thread (sink pad task) */
if (ogg->newsegment)
gst_event_unref (ogg->newsegment);
ogg->newsegment = event;
}
/* notify start of new segment */
if (ogg->segment.flags & GST_SEEK_FLAG_SEGMENT) {
GstMessage *message;
message = gst_message_new_segment_start (GST_OBJECT (ogg),
GST_FORMAT_TIME, ogg->segment.last_stop);
gst_message_set_seqnum (message, seqnum);
gst_element_post_message (GST_ELEMENT (ogg), message);
}
ogg->segment_running = TRUE;
ogg->seqnum = seqnum;
/* 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;
}
no_chain:
{
GST_DEBUG_OBJECT (ogg, "no chain to seek in");
GST_PAD_STREAM_UNLOCK (ogg->sinkpad);
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 GstFlowReturn
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;
GstFlowReturn ret;
gint64 offset;
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, &offset);
if (ret == GST_FLOW_UNEXPECTED) {
endsearched = bisect;
} else if (ret == GST_FLOW_OK) {
glong serial = ogg_page_serialno (&og);
if (!gst_ogg_chain_has_stream (chain, serial)) {
endsearched = bisect;
next = offset;
} else {
searched = offset + og.header_len + og.body_len;
}
} else
return ret;
}
GST_LOG_OBJECT (ogg, "current chain ends at %" G_GINT64_FORMAT, searched);
chain->end_offset = searched;
ret = gst_ogg_demux_read_end_chain (ogg, chain);
if (ret != GST_FLOW_OK)
return ret;
GST_LOG_OBJECT (ogg, "found begin at %" G_GINT64_FORMAT, next);
gst_ogg_demux_seek (ogg, next);
ret = gst_ogg_demux_read_chain (ogg, &nextchain);
if (ret == GST_FLOW_UNEXPECTED) {
nextchain = NULL;
ret = GST_FLOW_OK;
GST_LOG_OBJECT (ogg, "no next chain");
} else if (ret != GST_FLOW_OK)
goto done;
if (searched < end && nextchain != NULL) {
ret = gst_ogg_demux_bisect_forward_serialno (ogg, next, ogg->offset,
end, nextchain, m + 1);
if (ret != GST_FLOW_OK)
goto done;
}
GST_LOG_OBJECT (ogg, "adding chain %p", chain);
g_array_insert_val (ogg->chains, 0, chain);
done:
return ret;
}
/* 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 GstFlowReturn
gst_ogg_demux_read_chain (GstOggDemux * ogg, GstOggChain ** res_chain)
{
GstFlowReturn ret;
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;
ret = gst_ogg_demux_get_next_page (ogg, &op, -1, NULL);
if (ret != GST_FLOW_OK) {
GST_WARNING_OBJECT (ogg, "problem reading BOS page: ret=%d", ret);
break;
}
if (!ogg_page_bos (&op)) {
GST_WARNING_OBJECT (ogg, "page is not BOS page");
/* if we did not find a chain yet, assume this is a bogus stream and
* ignore it */
if (!chain)
ret = GST_FLOW_UNEXPECTED;
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 %08lx BOS page twice, ignoring",
serial);
continue;
}
pad = gst_ogg_chain_new_stream (chain, serial);
gst_ogg_pad_submit_page (pad, &op);
}
if (ret != GST_FLOW_OK || chain == NULL) {
if (ret == GST_FLOW_OK) {
GST_WARNING_OBJECT (ogg, "no chain was found");
ret = GST_FLOW_ERROR;
} else if (ret != GST_FLOW_UNEXPECTED) {
GST_WARNING_OBJECT (ogg, "failed to read chain");
} else {
GST_DEBUG_OBJECT (ogg, "done reading chains");
}
if (chain) {
gst_ogg_chain_free (chain);
}
if (res_chain)
*res_chain = NULL;
return ret;
}
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;
GstFlowReturn 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);
GST_LOG_OBJECT (ogg, "serial %08x time %" GST_TIME_FORMAT, pad->serialno,
GST_TIME_ARGS (pad->start_time));
if (pad->serialno == serial) {
known_serial = TRUE;
/* submit the page now, this will fill in the start_time when the
* internal decoder finds it */
gst_ogg_pad_submit_page (pad, &op);
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;
}
}
/* the timestamp will be filled in when we submit the pages */
if (!pad->is_skeleton)
done &= (pad->start_time != GST_CLOCK_TIME_NONE);
GST_LOG_OBJECT (ogg, "done %08x now %d", pad->serialno, done);
}
/* we read a page not belonging to the current chain: seek back to the
* beginning of the chain
*/
if (!known_serial) {
GST_LOG_OBJECT (ogg, "unknown serial %08lx", serial);
gst_ogg_demux_seek (ogg, offset);
break;
}
if (!done) {
ret = gst_ogg_demux_get_next_page (ogg, &op, -1, NULL);
if (ret != GST_FLOW_OK)
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;
}
if (res_chain)
*res_chain = chain;
return GST_FLOW_OK;
}
/* read the last pages from the ogg stream to get the final
* page end_offsets.
*/
static GstFlowReturn
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;
GstFlowReturn 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, NULL);
if (ret == GST_FLOW_LIMIT)
break;
if (ret != GST_FLOW_OK)
return ret;
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 GST_FLOW_OK;
}
/* 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;
}
/* returns TRUE if all streams have valid start time */
static gboolean
gst_ogg_demux_collect_chain_info (GstOggDemux * ogg, GstOggChain * chain)
{
gint i;
gboolean res = TRUE;
chain->total_time = GST_CLOCK_TIME_NONE;
chain->segment_start = G_MAXUINT64;
GST_DEBUG_OBJECT (ogg, "trying to collect chain info");
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)
res = FALSE;
else
chain->segment_start = MIN (chain->segment_start, pad->start_time);
}
if (chain->segment_stop != GST_CLOCK_TIME_NONE
&& chain->segment_start != G_MAXUINT64)
chain->total_time = chain->segment_stop - chain->segment_start;
GST_DEBUG_OBJECT (ogg, "return %d", res);
return res;
}
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 GstFlowReturn
gst_ogg_demux_find_chains (GstOggDemux * ogg)
{
ogg_page og;
GstPad *peer;
GstFormat format;
gboolean res;
gulong serialno;
GstOggChain *chain;
GstFlowReturn ret;
/* 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);
ret = gst_ogg_demux_read_chain (ogg, &chain);
if (ret != GST_FLOW_OK)
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);
ret = gst_ogg_demux_get_prev_page (ogg, &og, NULL);
if (ret != GST_FLOW_OK)
goto no_last_page;
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. */
ret =
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. */
ret =
gst_ogg_demux_bisect_forward_serialno (ogg, 0, ogg->length, ogg->length,
chain, 0);
}
if (ret != GST_FLOW_OK)
goto done;
/* all fine, collect and print */
gst_ogg_demux_collect_info (ogg);
/* dump our chains and streams */
gst_ogg_print (ogg);
done:
return ret;
/*** error cases ***/
no_peer:
{
GST_ELEMENT_ERROR (ogg, STREAM, DEMUX, (NULL), ("we don't have a peer"));
return GST_FLOW_NOT_LINKED;
}
no_length:
{
GST_ELEMENT_ERROR (ogg, STREAM, DEMUX, (NULL), ("can't get file length"));
return GST_FLOW_NOT_SUPPORTED;
}
no_first_chain:
{
GST_ELEMENT_ERROR (ogg, STREAM, DEMUX, (NULL), ("can't get first chain"));
return GST_FLOW_ERROR;
}
no_last_page:
{
GST_DEBUG_OBJECT (ogg, "can't get last page");
if (chain)
gst_ogg_chain_free (chain);
return ret;
}
}
static GstFlowReturn
gst_ogg_demux_handle_page (GstOggDemux * ogg, ogg_page * page)
{
GstOggPad *pad;
gint64 granule;
guint serialno;
GstFlowReturn result = GST_FLOW_OK;
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) {
GstEvent *event;
gint64 start = 0;
if (chain->segment_start != GST_CLOCK_TIME_NONE)
start = chain->segment_start;
/* create the newsegment event we are going to send out */
event = gst_event_new_new_segment (FALSE, ogg->segment.rate,
GST_FORMAT_TIME, start, chain->segment_stop, chain->begin_time);
gst_event_set_seqnum (event, ogg->seqnum);
GST_DEBUG_OBJECT (ogg,
"segment: start %" GST_TIME_FORMAT ", stop %" GST_TIME_FORMAT
", time %" GST_TIME_FORMAT, GST_TIME_ARGS (start),
GST_TIME_ARGS (chain->segment_stop),
GST_TIME_ARGS (chain->begin_time));
/* activate it as it means we have a non-header, this will also deactivate
* the currently running chain. */
gst_ogg_demux_activate_chain (ogg, chain, event);
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;
/* time of new chain is 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 means an ogg page without bos has been seen for this
* serialno. we just ignore it but post a warning... */
GST_ELEMENT_WARNING (ogg, STREAM, DECODE,
(NULL), ("unknown ogg pad for serial %08x detected", serialno));
return GST_FLOW_OK;
}
return result;
/* ERRORS */
unknown_chain:
{
GST_ELEMENT_ERROR (ogg, STREAM, DECODE,
(NULL), ("unknown ogg chain for serial %08x detected", serialno));
return GST_FLOW_ERROR;
}
}
/* 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;
GstFlowReturn result = GST_FLOW_OK;
ogg = GST_OGG_DEMUX (GST_OBJECT_PARENT (pad));
GST_DEBUG_OBJECT (ogg, "chain");
result = gst_ogg_demux_submit_buffer (ogg, buffer);
while (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 */
GST_DEBUG_OBJECT (ogg, "discont in page found, continuing");
} else {
result = gst_ogg_demux_handle_page (ogg, &page);
}
}
return result;
}
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 (pad, "Pushing event %" GST_PTR_FORMAT, event);
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;
/* 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;
}
static GstFlowReturn
gst_ogg_demux_loop_forward (GstOggDemux * ogg)
{
GstFlowReturn ret;
GstBuffer *buffer;
if (ogg->offset == ogg->length) {
GST_LOG_OBJECT (ogg, "no more data to pull %" G_GINT64_FORMAT
" == %" G_GINT64_FORMAT, ogg->offset, ogg->length);
ret = GST_FLOW_UNEXPECTED;
goto done;
}
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 done;
}
ogg->offset += GST_BUFFER_SIZE (buffer);
if (G_UNLIKELY (ogg->newsegment)) {
gst_ogg_demux_send_event (ogg, ogg->newsegment);
ogg->newsegment = NULL;
}
ret = gst_ogg_demux_chain (ogg->sinkpad, buffer);
if (ret != GST_FLOW_OK) {
GST_LOG_OBJECT (ogg, "Failed demux_chain");
goto done;
}
/* 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) {
ret = GST_FLOW_UNEXPECTED;
goto done;
}
}
done:
return ret;
}
/* reverse mode.
*
* We read the pages backwards and send the packets forwards. The first packet
* in the page will be pushed with the DISCONT flag set.
*
* Special care has to be taken for continued pages, which we can only decode
* when we have the previous page(s).
*/
static GstFlowReturn
gst_ogg_demux_loop_reverse (GstOggDemux * ogg)
{
GstFlowReturn ret;
ogg_page page;
gint64 offset;
if (ogg->offset == 0) {
GST_LOG_OBJECT (ogg, "no more data to pull %" G_GINT64_FORMAT
" == 0", ogg->offset);
ret = GST_FLOW_UNEXPECTED;
goto done;
}
GST_LOG_OBJECT (ogg, "read page from %" G_GINT64_FORMAT, ogg->offset);
ret = gst_ogg_demux_get_prev_page (ogg, &page, &offset);
if (ret != GST_FLOW_OK)
goto done;
ogg->offset = offset;
if (G_UNLIKELY (ogg->newsegment)) {
gst_ogg_demux_send_event (ogg, ogg->newsegment);
ogg->newsegment = NULL;
}
ret = gst_ogg_demux_handle_page (ogg, &page);
if (ret != GST_FLOW_OK)
goto done;
/* check for the end of the segment */
if (ogg->segment.start != -1 && ogg->segment.last_stop != -1) {
if (ogg->segment.last_stop <= ogg->segment.start) {
ret = GST_FLOW_UNEXPECTED;
goto done;
}
}
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;
GstEvent *event;
ogg = GST_OGG_DEMUX (GST_OBJECT_PARENT (pad));
if (ogg->need_chains) {
gboolean res;
/* this is the only place where we write chains and thus need to lock. */
GST_CHAIN_LOCK (ogg);
ret = gst_ogg_demux_find_chains (ogg);
GST_CHAIN_UNLOCK (ogg);
if (ret != GST_FLOW_OK)
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->segment.rate >= 0.0)
ret = gst_ogg_demux_loop_forward (ogg);
else
ret = gst_ogg_demux_loop_reverse (ogg);
if (ret != GST_FLOW_OK)
goto pause;
return;
/* ERRORS */
chain_read_failed:
{
/* error was posted */
goto pause;
}
seek_failed:
{
GST_ELEMENT_ERROR (ogg, STREAM, DEMUX, (NULL),
("failed to start demuxing ogg"));
ret = GST_FLOW_ERROR;
goto pause;
}
pause:
{
const gchar *reason = gst_flow_get_name (ret);
GstEvent *event = NULL;
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;
GstMessage *message;
/* 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");
message =
gst_message_new_segment_done (GST_OBJECT (ogg), GST_FORMAT_TIME,
stop);
gst_message_set_seqnum (message, ogg->seqnum);
gst_element_post_message (GST_ELEMENT (ogg), message);
} else {
/* normal playback, send EOS to all linked pads */
GST_LOG_OBJECT (ogg, "Sending EOS, at end of stream");
event = gst_event_new_eos ();
}
} else {
GST_ELEMENT_ERROR (ogg, STREAM, FAILED,
(_("Internal data stream error.")),
("stream stopped, reason %s", reason));
event = gst_event_new_eos ();
}
if (event) {
gst_event_set_seqnum (event, ogg->seqnum);
gst_ogg_demux_send_event (ogg, event);
}
}
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)) {
GST_DEBUG_OBJECT (sinkpad, "activating pull");
return gst_pad_activate_pull (sinkpad, TRUE);
} else {
GST_DEBUG_OBJECT (sinkpad, "activating push");
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);
bind_textdomain_codeset (GETTEXT_PACKAGE, "UTF-8");
#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 */