mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-09-08 13:18:52 +00:00
If we have an upstream GST_EVENT_STREAM_START, use that one instead of creating a new one which could be completely different from the upstream one and drop information (like the stream flags and stream object). Only create a new event if we don't already have one from upstream https://bugzilla.gnome.org/show_bug.cgi?id=797215
1899 lines
57 KiB
C
1899 lines
57 KiB
C
/* GStreamer Base Class for Tag Demuxing
|
|
* Copyright (C) 2005 Jan Schmidt <thaytan@mad.scientist.com>
|
|
* Copyright (C) 2006-2007 Tim-Philipp Müller <tim centricular net>
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Library General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2 of the License, or (at your option) any later version.
|
|
*
|
|
* This library is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Library General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Library General Public
|
|
* License along with this library; if not, write to the
|
|
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
|
|
* Boston, MA 02110-1301, USA.
|
|
*/
|
|
|
|
/**
|
|
* SECTION:gsttagdemux
|
|
* @title: GstTagDemux
|
|
* @see_also: GstApeDemux, GstID3Demux
|
|
* @short_description: Base class for demuxing tags that are in chunks
|
|
* directly at the beginning or at the end of a file
|
|
*
|
|
* Provides a base class for demuxing tags at the beginning or end of a
|
|
* stream and handles things like typefinding, querying, seeking, and
|
|
* different modes of operation (chain-based, pull_range-based, and providing
|
|
* downstream elements with random access if upstream supports that). The tag
|
|
* is stripped from the output, and all offsets are adjusted for the tag
|
|
* sizes, so that to the downstream element the stream will appear as if
|
|
* there was no tag at all. Also, once the tag has been parsed, GstTagDemux
|
|
* will try to determine the media type of the resulting stream and add a
|
|
* source pad with the appropriate caps in order to facilitate auto-plugging.
|
|
*
|
|
* ## Deriving from GstTagDemux
|
|
*
|
|
* Subclasses have to do four things:
|
|
*
|
|
* * In their base init function, they must add a pad template for the sink
|
|
* pad to the element class, describing the media type they can parse in
|
|
* the caps of the pad template.
|
|
* * In their class init function, they must override
|
|
* GST_TAG_DEMUX_CLASS(demux_klass)->identify_tag with their own identify
|
|
* function.
|
|
* * In their class init function, they must override
|
|
* GST_TAG_DEMUX_CLASS(demux_klass)->parse_tag with their own parse
|
|
* function.
|
|
* * In their class init function, they must also set
|
|
* GST_TAG_DEMUX_CLASS(demux_klass)->min_start_size and/or
|
|
* GST_TAG_DEMUX_CLASS(demux_klass)->min_end_size to the minimum size required
|
|
* for the identify function to decide whether the stream has a supported tag
|
|
* or not. A class parsing ID3v1 tags, for example, would set min_end_size to
|
|
* 128 bytes.
|
|
*/
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
#include "config.h"
|
|
#endif
|
|
|
|
#include "gsttagdemux.h"
|
|
|
|
#include <gst/base/gsttypefindhelper.h>
|
|
#include <gst/base/gstadapter.h>
|
|
#include <gst/gst-i18n-plugin.h>
|
|
#include <string.h>
|
|
|
|
typedef enum
|
|
{
|
|
GST_TAG_DEMUX_READ_START_TAG,
|
|
GST_TAG_DEMUX_TYPEFINDING,
|
|
GST_TAG_DEMUX_STREAMING
|
|
} GstTagDemuxState;
|
|
|
|
struct _GstTagDemuxPrivate
|
|
{
|
|
GstPad *srcpad;
|
|
GstPad *sinkpad;
|
|
|
|
/* Number of bytes to remove from the
|
|
* start of file (tag at beginning) */
|
|
guint strip_start;
|
|
|
|
/* Number of bytes to remove from the
|
|
* end of file (tag at end) */
|
|
guint strip_end;
|
|
|
|
gint64 upstream_size;
|
|
|
|
GstTagDemuxState state;
|
|
GstAdapter *adapter;
|
|
GstBuffer *collect;
|
|
gsize collect_size;
|
|
guint tagsize;
|
|
GstCaps *src_caps;
|
|
|
|
GstTagList *event_tags;
|
|
GstTagList *parsed_tags;
|
|
gboolean send_tag_event;
|
|
|
|
GstSegment segment;
|
|
gboolean need_newseg;
|
|
|
|
guint64 offset;
|
|
|
|
GList *pending_events;
|
|
};
|
|
|
|
/* Require at least 8kB of data before we attempt typefind.
|
|
* Seems a decent value based on test files
|
|
* 40kB is massive overkill for the maximum, I think, but it
|
|
* doesn't do any harm (tpm: increased to 64kB after watching
|
|
* typefinding fail on a wavpack file that needed 42kB to succeed) */
|
|
#define TYPE_FIND_MIN_SIZE 8192
|
|
#define TYPE_FIND_MAX_SIZE 65536
|
|
|
|
#define DEFAULT_PULL_BLOCKSIZE 4096
|
|
|
|
GST_DEBUG_CATEGORY_STATIC (tagdemux_debug);
|
|
#define GST_CAT_DEFAULT (tagdemux_debug)
|
|
|
|
static GstStaticPadTemplate src_factory = GST_STATIC_PAD_TEMPLATE ("src",
|
|
GST_PAD_SRC,
|
|
GST_PAD_ALWAYS,
|
|
GST_STATIC_CAPS ("ANY")
|
|
);
|
|
|
|
static void gst_tag_demux_element_loop (GstTagDemux * demux);
|
|
|
|
static void gst_tag_demux_dispose (GObject * object);
|
|
|
|
static GstFlowReturn gst_tag_demux_chain (GstPad * pad, GstObject * parent,
|
|
GstBuffer * buf);
|
|
static gboolean gst_tag_demux_sink_event (GstPad * pad, GstObject * parent,
|
|
GstEvent * event);
|
|
|
|
static gboolean gst_tag_demux_sink_activate_mode (GstPad * pad,
|
|
GstObject * parent, GstPadMode mode, gboolean active);
|
|
static gboolean gst_tag_demux_src_activate_mode (GstPad * pad,
|
|
GstObject * parent, GstPadMode mode, gboolean active);
|
|
static GstFlowReturn gst_tag_demux_read_range (GstTagDemux * tagdemux,
|
|
GstObject * parent, guint64 offset, guint length, GstBuffer ** buffer);
|
|
|
|
static GstFlowReturn gst_tag_demux_src_getrange (GstPad * srcpad,
|
|
GstObject * parent, guint64 offset, guint length, GstBuffer ** buffer);
|
|
|
|
static void gst_tag_demux_set_src_caps (GstTagDemux * tagdemux,
|
|
GstCaps * new_caps);
|
|
|
|
static gboolean gst_tag_demux_srcpad_event (GstPad * pad, GstObject * parent,
|
|
GstEvent * event);
|
|
static gboolean gst_tag_demux_sink_activate (GstPad * sinkpad,
|
|
GstObject * parent);
|
|
static GstStateChangeReturn gst_tag_demux_change_state (GstElement * element,
|
|
GstStateChange transition);
|
|
static gboolean gst_tag_demux_pad_query (GstPad * pad, GstObject * parent,
|
|
GstQuery * query);
|
|
static gboolean gst_tag_demux_get_upstream_size (GstTagDemux * tagdemux);
|
|
static void gst_tag_demux_send_pending_events (GstTagDemux * tagdemux);
|
|
static void gst_tag_demux_send_tag_event (GstTagDemux * tagdemux);
|
|
static gboolean gst_tag_demux_send_new_segment (GstTagDemux * tagdemux);
|
|
|
|
static void gst_tag_demux_base_init (gpointer g_class);
|
|
static void gst_tag_demux_class_init (gpointer g_class, gpointer d);
|
|
static void gst_tag_demux_init (GstTagDemux * obj, GstTagDemuxClass * klass);
|
|
|
|
static gpointer parent_class; /* NULL */
|
|
static gint private_offset = 0;
|
|
|
|
/* Cannot use boilerplate macros here because we want the abstract flag */
|
|
GType
|
|
gst_tag_demux_get_type (void)
|
|
{
|
|
static GType object_type; /* 0 */
|
|
|
|
if (object_type == 0) {
|
|
static const GTypeInfo object_info = {
|
|
sizeof (GstTagDemuxClass),
|
|
gst_tag_demux_base_init,
|
|
NULL, /* base_finalize */
|
|
gst_tag_demux_class_init,
|
|
NULL, /* class_finalize */
|
|
NULL, /* class_data */
|
|
sizeof (GstTagDemux),
|
|
0, /* n_preallocs */
|
|
(GInstanceInitFunc) gst_tag_demux_init
|
|
};
|
|
|
|
object_type = g_type_register_static (GST_TYPE_ELEMENT,
|
|
"GstTagDemux", &object_info, G_TYPE_FLAG_ABSTRACT);
|
|
|
|
private_offset =
|
|
g_type_add_instance_private (object_type, sizeof (GstTagDemuxPrivate));
|
|
}
|
|
|
|
return object_type;
|
|
}
|
|
|
|
static inline GstTagDemuxPrivate *
|
|
gst_tag_demux_get_instance_private (GstTagDemux * self)
|
|
{
|
|
return (G_STRUCT_MEMBER_P (self, private_offset));
|
|
}
|
|
|
|
static void
|
|
gst_tag_demux_base_init (gpointer klass)
|
|
{
|
|
GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
|
|
|
|
gst_element_class_add_static_pad_template (element_class, &src_factory);
|
|
|
|
GST_DEBUG_CATEGORY_INIT (tagdemux_debug, "tagdemux", 0,
|
|
"tag demux base class");
|
|
}
|
|
|
|
static void
|
|
gst_tag_demux_class_init (gpointer klass, gpointer d)
|
|
{
|
|
GstTagDemuxClass *tagdemux_class = GST_TAG_DEMUX_CLASS (klass);
|
|
GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
|
|
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
|
|
|
|
parent_class = g_type_class_peek_parent (klass);
|
|
|
|
gobject_class->dispose = gst_tag_demux_dispose;
|
|
|
|
element_class->change_state = GST_DEBUG_FUNCPTR (gst_tag_demux_change_state);
|
|
|
|
if (private_offset != 0)
|
|
g_type_class_adjust_private_offset (klass, &private_offset);
|
|
|
|
/* subclasses must set at least one of these */
|
|
tagdemux_class->min_start_size = 0;
|
|
tagdemux_class->min_end_size = 0;
|
|
}
|
|
|
|
static void
|
|
gst_tag_demux_reset (GstTagDemux * tagdemux)
|
|
{
|
|
GstBuffer **buffer_p = &tagdemux->priv->collect;
|
|
GstCaps **caps_p = &tagdemux->priv->src_caps;
|
|
|
|
tagdemux->priv->strip_start = 0;
|
|
tagdemux->priv->strip_end = 0;
|
|
tagdemux->priv->upstream_size = -1;
|
|
tagdemux->priv->state = GST_TAG_DEMUX_READ_START_TAG;
|
|
tagdemux->priv->send_tag_event = FALSE;
|
|
|
|
gst_buffer_replace (buffer_p, NULL);
|
|
tagdemux->priv->collect_size = 0;
|
|
tagdemux->priv->tagsize = 0;
|
|
gst_adapter_clear (tagdemux->priv->adapter);
|
|
gst_caps_replace (caps_p, NULL);
|
|
|
|
if (tagdemux->priv->event_tags) {
|
|
gst_tag_list_unref (tagdemux->priv->event_tags);
|
|
tagdemux->priv->event_tags = NULL;
|
|
}
|
|
if (tagdemux->priv->parsed_tags) {
|
|
gst_tag_list_unref (tagdemux->priv->parsed_tags);
|
|
tagdemux->priv->parsed_tags = NULL;
|
|
}
|
|
|
|
gst_segment_init (&tagdemux->priv->segment, GST_FORMAT_UNDEFINED);
|
|
tagdemux->priv->need_newseg = TRUE;
|
|
|
|
g_list_foreach (tagdemux->priv->pending_events,
|
|
(GFunc) gst_mini_object_unref, NULL);
|
|
g_list_free (tagdemux->priv->pending_events);
|
|
tagdemux->priv->pending_events = NULL;
|
|
}
|
|
|
|
static void
|
|
gst_tag_demux_init (GstTagDemux * demux, GstTagDemuxClass * gclass)
|
|
{
|
|
GstElementClass *element_klass = GST_ELEMENT_CLASS (gclass);
|
|
GstPadTemplate *tmpl;
|
|
|
|
demux->priv = gst_tag_demux_get_instance_private (demux);
|
|
|
|
/* sink pad */
|
|
tmpl = gst_element_class_get_pad_template (element_klass, "sink");
|
|
if (tmpl) {
|
|
demux->priv->sinkpad = gst_pad_new_from_template (tmpl, "sink");
|
|
|
|
gst_pad_set_activatemode_function (demux->priv->sinkpad,
|
|
GST_DEBUG_FUNCPTR (gst_tag_demux_sink_activate_mode));
|
|
gst_pad_set_activate_function (demux->priv->sinkpad,
|
|
GST_DEBUG_FUNCPTR (gst_tag_demux_sink_activate));
|
|
gst_pad_set_event_function (demux->priv->sinkpad,
|
|
GST_DEBUG_FUNCPTR (gst_tag_demux_sink_event));
|
|
gst_pad_set_chain_function (demux->priv->sinkpad,
|
|
GST_DEBUG_FUNCPTR (gst_tag_demux_chain));
|
|
gst_element_add_pad (GST_ELEMENT (demux), demux->priv->sinkpad);
|
|
} else {
|
|
g_warning ("GstTagDemux subclass %s must provide a sink pad template",
|
|
G_OBJECT_TYPE_NAME (demux));
|
|
}
|
|
|
|
/* source pad */
|
|
tmpl = gst_element_class_get_pad_template (element_klass, "src");
|
|
demux->priv->srcpad = gst_pad_new_from_template (tmpl, "src");
|
|
gst_pad_set_query_function (demux->priv->srcpad,
|
|
GST_DEBUG_FUNCPTR (gst_tag_demux_pad_query));
|
|
gst_pad_set_event_function (demux->priv->srcpad,
|
|
GST_DEBUG_FUNCPTR (gst_tag_demux_srcpad_event));
|
|
gst_pad_set_activatemode_function (demux->priv->srcpad,
|
|
GST_DEBUG_FUNCPTR (gst_tag_demux_src_activate_mode));
|
|
gst_pad_set_getrange_function (demux->priv->srcpad,
|
|
GST_DEBUG_FUNCPTR (gst_tag_demux_src_getrange));
|
|
gst_pad_use_fixed_caps (demux->priv->srcpad);
|
|
gst_element_add_pad (GST_ELEMENT (demux), demux->priv->srcpad);
|
|
|
|
demux->priv->adapter = gst_adapter_new ();
|
|
gst_tag_demux_reset (demux);
|
|
}
|
|
|
|
static void
|
|
gst_tag_demux_dispose (GObject * object)
|
|
{
|
|
GstTagDemux *tagdemux = GST_TAG_DEMUX (object);
|
|
|
|
gst_tag_demux_reset (tagdemux);
|
|
if (tagdemux->priv->adapter) {
|
|
g_object_unref (tagdemux->priv->adapter);
|
|
tagdemux->priv->adapter = NULL;
|
|
}
|
|
|
|
G_OBJECT_CLASS (parent_class)->dispose (object);
|
|
}
|
|
|
|
// FIXME: convert to set_caps / sending a caps event
|
|
static void
|
|
gst_tag_demux_set_src_caps (GstTagDemux * tagdemux, GstCaps * new_caps)
|
|
{
|
|
GstCaps *old_caps = tagdemux->priv->src_caps;
|
|
|
|
if (old_caps == NULL || !gst_caps_is_equal (new_caps, old_caps)) {
|
|
GstEvent *event;
|
|
|
|
gst_caps_replace (&tagdemux->priv->src_caps, new_caps);
|
|
|
|
GST_DEBUG_OBJECT (tagdemux, "Changing src pad caps to %" GST_PTR_FORMAT,
|
|
tagdemux->priv->src_caps);
|
|
|
|
event =
|
|
gst_pad_get_sticky_event (tagdemux->priv->sinkpad,
|
|
GST_EVENT_STREAM_START, 0);
|
|
if (!event) {
|
|
gchar *stream_id = gst_pad_create_stream_id (tagdemux->priv->srcpad,
|
|
GST_ELEMENT_CAST (tagdemux), NULL);
|
|
GST_DEBUG_OBJECT (tagdemux, "Creating new STREAM_START event");
|
|
event = gst_event_new_stream_start (stream_id);
|
|
g_free (stream_id);
|
|
gst_event_set_group_id (event, gst_util_group_id_next ());
|
|
}
|
|
gst_pad_push_event (tagdemux->priv->srcpad, event);
|
|
|
|
gst_pad_set_caps (tagdemux->priv->srcpad, tagdemux->priv->src_caps);
|
|
} else {
|
|
/* Caps never changed */
|
|
}
|
|
}
|
|
|
|
/* will return FALSE if buffer is beyond end of data; will return TRUE
|
|
* if buffer was trimmed successfully or didn't need trimming, but may
|
|
* also return TRUE and set *buf_ref to NULL if the buffer was before
|
|
* the start of the data */
|
|
static gboolean
|
|
gst_tag_demux_trim_buffer (GstTagDemux * tagdemux, GstBuffer ** buf_ref,
|
|
gsize * buf_size)
|
|
{
|
|
GstBuffer *buf = *buf_ref;
|
|
|
|
guint trim_start = 0;
|
|
guint out_size, bsize;
|
|
guint64 out_offset, boffset;
|
|
gboolean need_sub = FALSE;
|
|
|
|
bsize = out_size = gst_buffer_get_size (buf);
|
|
boffset = out_offset = GST_BUFFER_OFFSET (buf);
|
|
|
|
/* Adjust offset and length */
|
|
if (!GST_BUFFER_OFFSET_IS_VALID (buf)) {
|
|
/* Can't change anything without an offset */
|
|
*buf_size = bsize;
|
|
return TRUE;
|
|
}
|
|
|
|
/* If the buffer crosses the tag at the end of file, trim it */
|
|
if (tagdemux->priv->strip_end > 0) {
|
|
if (gst_tag_demux_get_upstream_size (tagdemux)) {
|
|
guint64 v1tag_offset =
|
|
tagdemux->priv->upstream_size - tagdemux->priv->strip_end;
|
|
|
|
if (out_offset >= v1tag_offset) {
|
|
GST_DEBUG_OBJECT (tagdemux, "Buffer is past the end of the data");
|
|
goto no_out_buffer_end;
|
|
}
|
|
|
|
if (out_offset + out_size > v1tag_offset) {
|
|
out_size = v1tag_offset - out_offset;
|
|
need_sub = TRUE;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (tagdemux->priv->strip_start > 0) {
|
|
/* If the buffer crosses the tag at the start of file, trim it */
|
|
if (out_offset <= tagdemux->priv->strip_start) {
|
|
if (out_offset + out_size <= tagdemux->priv->strip_start) {
|
|
GST_DEBUG_OBJECT (tagdemux, "Buffer is before the start of the data");
|
|
goto no_out_buffer_start;
|
|
}
|
|
|
|
trim_start = tagdemux->priv->strip_start - out_offset;
|
|
out_size -= trim_start;
|
|
out_offset = 0;
|
|
} else {
|
|
out_offset -= tagdemux->priv->strip_start;
|
|
}
|
|
need_sub = TRUE;
|
|
}
|
|
|
|
if (need_sub) {
|
|
if (out_size != bsize || !gst_buffer_is_writable (buf)) {
|
|
GstBuffer *sub;
|
|
|
|
GST_DEBUG_OBJECT (tagdemux, "Sub-buffering to trim size %d offset %"
|
|
G_GINT64_FORMAT " to %d offset %" G_GINT64_FORMAT,
|
|
bsize, boffset, out_size, out_offset);
|
|
|
|
sub =
|
|
gst_buffer_copy_region (buf, GST_BUFFER_COPY_ALL, trim_start,
|
|
out_size);
|
|
g_return_val_if_fail (sub != NULL, FALSE);
|
|
if (GST_BUFFER_TIMESTAMP_IS_VALID (buf))
|
|
GST_BUFFER_TIMESTAMP (sub) = GST_BUFFER_TIMESTAMP (buf);
|
|
if (GST_BUFFER_DURATION_IS_VALID (buf))
|
|
GST_BUFFER_DURATION (sub) = GST_BUFFER_DURATION (buf);
|
|
gst_buffer_unref (buf);
|
|
*buf_ref = buf = sub;
|
|
*buf_size = out_size;
|
|
} else {
|
|
GST_DEBUG_OBJECT (tagdemux, "Adjusting buffer from size %d offset %"
|
|
G_GINT64_FORMAT " to %d offset %" G_GINT64_FORMAT,
|
|
bsize, boffset, out_size, out_offset);
|
|
}
|
|
|
|
GST_BUFFER_OFFSET (buf) = out_offset;
|
|
GST_BUFFER_OFFSET_END (buf) = out_offset + out_size;
|
|
}
|
|
|
|
return TRUE;
|
|
|
|
no_out_buffer_end:
|
|
{
|
|
gst_buffer_unref (buf);
|
|
*buf_ref = NULL;
|
|
return FALSE;
|
|
}
|
|
no_out_buffer_start:
|
|
{
|
|
gst_buffer_unref (buf);
|
|
*buf_ref = NULL;
|
|
return TRUE;
|
|
}
|
|
}
|
|
|
|
static void
|
|
update_collected (GstTagDemux * demux)
|
|
{
|
|
guint avail;
|
|
GstBuffer *buf;
|
|
|
|
avail = gst_adapter_available (demux->priv->adapter);
|
|
if (avail == 0)
|
|
return;
|
|
|
|
buf = gst_adapter_take_buffer (demux->priv->adapter, avail);
|
|
|
|
if (demux->priv->collect == NULL) {
|
|
demux->priv->collect = buf;
|
|
} else {
|
|
demux->priv->collect = gst_buffer_append (demux->priv->collect, buf);
|
|
}
|
|
demux->priv->collect_size += avail;
|
|
}
|
|
|
|
static void
|
|
gst_tag_demux_chain_parse_tag (GstTagDemux * demux)
|
|
{
|
|
GstBuffer *collect;
|
|
GstTagDemuxResult parse_ret;
|
|
GstTagDemuxClass *klass;
|
|
guint tagsize = 0;
|
|
guint available;
|
|
|
|
available =
|
|
demux->priv->collect_size + gst_adapter_available (demux->priv->adapter);
|
|
|
|
klass = GST_TAG_DEMUX_CLASS (G_OBJECT_GET_CLASS (demux));
|
|
|
|
if (available < klass->min_start_size) {
|
|
GST_DEBUG_OBJECT (demux, "Only %u bytes available, but %u needed "
|
|
"to identify tag", available, klass->min_start_size);
|
|
return; /* wait for more data */
|
|
}
|
|
|
|
if (available < demux->priv->tagsize) {
|
|
GST_DEBUG_OBJECT (demux, "Only %u bytes available, but %u needed "
|
|
"to parse tag", available, demux->priv->tagsize);
|
|
return; /* wait for more data */
|
|
}
|
|
|
|
update_collected (demux);
|
|
demux->priv->collect = gst_buffer_make_writable (demux->priv->collect);
|
|
collect = demux->priv->collect;
|
|
|
|
g_assert (gst_buffer_is_writable (collect));
|
|
|
|
|
|
/* If we receive a buffer that's from the middle of the file,
|
|
* we can't read tags so move to typefinding */
|
|
if (GST_BUFFER_OFFSET_IS_VALID (collect) && GST_BUFFER_OFFSET (collect) != 0) {
|
|
GST_DEBUG_OBJECT (demux, "Received buffer from non-zero offset %"
|
|
G_GINT64_FORMAT ". Can't read tags", GST_BUFFER_OFFSET (collect));
|
|
demux->priv->state = GST_TAG_DEMUX_TYPEFINDING;
|
|
return;
|
|
}
|
|
|
|
g_assert (klass->identify_tag != NULL);
|
|
g_assert (klass->parse_tag != NULL);
|
|
|
|
if (!klass->identify_tag (demux, collect, TRUE, &tagsize)) {
|
|
GST_DEBUG_OBJECT (demux, "Could not identify start tag");
|
|
demux->priv->state = GST_TAG_DEMUX_TYPEFINDING;
|
|
return;
|
|
}
|
|
|
|
demux->priv->tagsize = tagsize;
|
|
|
|
/* need to set offset of first buffer to 0 or trimming won't work */
|
|
if (!GST_BUFFER_OFFSET_IS_VALID (collect)) {
|
|
GST_WARNING_OBJECT (demux, "Fixing up first buffer without offset");
|
|
GST_BUFFER_OFFSET (collect) = 0;
|
|
}
|
|
|
|
GST_DEBUG_OBJECT (demux, "Identified tag, size = %u bytes", tagsize);
|
|
|
|
do {
|
|
GstTagList *tags = NULL;
|
|
guint newsize, saved_size;
|
|
|
|
demux->priv->strip_start = tagsize;
|
|
|
|
if (available < tagsize) {
|
|
GST_DEBUG_OBJECT (demux, "Only %u bytes available, but %u needed "
|
|
"to parse tag", available, tagsize);
|
|
return; /* wait for more data */
|
|
}
|
|
|
|
saved_size = gst_buffer_get_size (collect);
|
|
gst_buffer_set_size (collect, tagsize);
|
|
newsize = tagsize;
|
|
|
|
parse_ret = klass->parse_tag (demux, collect, TRUE, &newsize, &tags);
|
|
|
|
gst_buffer_set_size (collect, saved_size);
|
|
|
|
switch (parse_ret) {
|
|
case GST_TAG_DEMUX_RESULT_OK:
|
|
demux->priv->strip_start = newsize;
|
|
demux->priv->parsed_tags = tags;
|
|
GST_DEBUG_OBJECT (demux, "Read start tag of size %u", newsize);
|
|
break;
|
|
case GST_TAG_DEMUX_RESULT_BROKEN_TAG:
|
|
demux->priv->strip_start = newsize;
|
|
demux->priv->parsed_tags = tags;
|
|
GST_WARNING_OBJECT (demux, "Ignoring broken start tag of size %d",
|
|
demux->priv->strip_start);
|
|
break;
|
|
case GST_TAG_DEMUX_RESULT_AGAIN:
|
|
GST_DEBUG_OBJECT (demux, "Re-parse, this time with %u bytes", newsize);
|
|
g_assert (newsize != tagsize);
|
|
tagsize = newsize;
|
|
break;
|
|
}
|
|
} while (parse_ret == GST_TAG_DEMUX_RESULT_AGAIN);
|
|
|
|
GST_LOG_OBJECT (demux, "Parsed tag. Proceeding to typefinding");
|
|
demux->priv->state = GST_TAG_DEMUX_TYPEFINDING;
|
|
demux->priv->send_tag_event = TRUE;
|
|
}
|
|
|
|
static GstFlowReturn
|
|
gst_tag_demux_chain_buffer (GstTagDemux * demux, GstBuffer * buf,
|
|
gboolean at_eos)
|
|
{
|
|
gsize size;
|
|
|
|
size = gst_buffer_get_size (buf);
|
|
|
|
/* Update our segment position info */
|
|
if (demux->priv->segment.format == GST_FORMAT_BYTES) {
|
|
if (GST_BUFFER_OFFSET_IS_VALID (buf))
|
|
demux->priv->segment.position = GST_BUFFER_OFFSET (buf);
|
|
demux->priv->segment.position += size;
|
|
} else if (demux->priv->segment.format == GST_FORMAT_TIME) {
|
|
if (GST_BUFFER_TIMESTAMP_IS_VALID (buf))
|
|
demux->priv->segment.position = GST_BUFFER_TIMESTAMP (buf);
|
|
if (GST_BUFFER_DURATION_IS_VALID (buf))
|
|
demux->priv->segment.position += GST_BUFFER_DURATION (buf);
|
|
}
|
|
|
|
gst_adapter_push (demux->priv->adapter, buf);
|
|
buf = NULL;
|
|
|
|
switch (demux->priv->state) {
|
|
case GST_TAG_DEMUX_READ_START_TAG:
|
|
gst_tag_demux_chain_parse_tag (demux);
|
|
if (demux->priv->state != GST_TAG_DEMUX_TYPEFINDING)
|
|
break;
|
|
/* Fall-through */
|
|
case GST_TAG_DEMUX_TYPEFINDING:{
|
|
GstTypeFindProbability probability = 0;
|
|
GstBuffer *typefind_buf = NULL;
|
|
gsize typefind_size;
|
|
GstCaps *caps;
|
|
|
|
update_collected (demux);
|
|
|
|
if (!at_eos && demux->priv->collect_size <
|
|
TYPE_FIND_MIN_SIZE + demux->priv->strip_start)
|
|
break; /* Go get more data first */
|
|
|
|
GST_DEBUG_OBJECT (demux, "Typefinding with size %" G_GSIZE_FORMAT,
|
|
demux->priv->collect_size);
|
|
|
|
/* Trim the buffer and adjust offset for typefinding */
|
|
typefind_buf = demux->priv->collect;
|
|
gst_buffer_ref (typefind_buf);
|
|
if (!gst_tag_demux_trim_buffer (demux, &typefind_buf, &typefind_size))
|
|
return GST_FLOW_EOS;
|
|
|
|
if (typefind_buf == NULL)
|
|
break; /* Still need more data */
|
|
|
|
caps = gst_type_find_helper_for_buffer (GST_OBJECT (demux),
|
|
typefind_buf, &probability);
|
|
|
|
if (caps == NULL) {
|
|
if (typefind_size < TYPE_FIND_MAX_SIZE) {
|
|
/* Just break for more data */
|
|
gst_buffer_unref (typefind_buf);
|
|
return GST_FLOW_OK;
|
|
}
|
|
|
|
/* We failed typefind */
|
|
GST_ELEMENT_ERROR (demux, STREAM, TYPE_NOT_FOUND, (NULL),
|
|
("Could not detect type for contents within tag"));
|
|
gst_buffer_unref (typefind_buf);
|
|
gst_buffer_unref (demux->priv->collect);
|
|
demux->priv->collect = NULL;
|
|
demux->priv->collect_size = 0;
|
|
return GST_FLOW_ERROR;
|
|
}
|
|
gst_buffer_unref (typefind_buf);
|
|
|
|
GST_DEBUG_OBJECT (demux, "Found type %" GST_PTR_FORMAT " with a "
|
|
"probability of %u", caps, probability);
|
|
|
|
gst_tag_demux_set_src_caps (demux, caps);
|
|
gst_caps_unref (caps);
|
|
|
|
/* Move onto streaming and fall-through to push out existing
|
|
* data */
|
|
demux->priv->state = GST_TAG_DEMUX_STREAMING;
|
|
/* fall-through */
|
|
}
|
|
case GST_TAG_DEMUX_STREAMING:{
|
|
GstBuffer *outbuf = NULL;
|
|
gsize outbuf_size;
|
|
|
|
update_collected (demux);
|
|
|
|
/* Trim the buffer and adjust offset */
|
|
if (demux->priv->collect) {
|
|
outbuf = demux->priv->collect;
|
|
demux->priv->collect = NULL;
|
|
demux->priv->collect_size = 0;
|
|
if (!gst_tag_demux_trim_buffer (demux, &outbuf, &outbuf_size))
|
|
return GST_FLOW_EOS;
|
|
}
|
|
if (outbuf) {
|
|
/* Might need a new segment before the buffer */
|
|
if (demux->priv->need_newseg) {
|
|
if (!gst_tag_demux_send_new_segment (demux)) {
|
|
GST_WARNING_OBJECT (demux, "Downstream did not handle newsegment "
|
|
"event as it should");
|
|
}
|
|
demux->priv->need_newseg = FALSE;
|
|
}
|
|
|
|
/* send any pending events we cached */
|
|
gst_tag_demux_send_pending_events (demux);
|
|
|
|
/* Send our own pending tag event */
|
|
if (demux->priv->send_tag_event) {
|
|
gst_tag_demux_send_tag_event (demux);
|
|
demux->priv->send_tag_event = FALSE;
|
|
}
|
|
|
|
GST_LOG_OBJECT (demux, "Pushing buffer %" GST_PTR_FORMAT, outbuf);
|
|
|
|
return gst_pad_push (demux->priv->srcpad, outbuf);
|
|
}
|
|
}
|
|
}
|
|
return GST_FLOW_OK;
|
|
}
|
|
|
|
static GstFlowReturn
|
|
gst_tag_demux_chain (GstPad * pad, GstObject * parent, GstBuffer * buf)
|
|
{
|
|
return gst_tag_demux_chain_buffer (GST_TAG_DEMUX (parent), buf, FALSE);
|
|
}
|
|
|
|
static gboolean
|
|
gst_tag_demux_sink_event (GstPad * pad, GstObject * parent, GstEvent * event)
|
|
{
|
|
GstTagDemux *demux;
|
|
gboolean ret;
|
|
|
|
demux = GST_TAG_DEMUX (parent);
|
|
|
|
switch (GST_EVENT_TYPE (event)) {
|
|
case GST_EVENT_EOS:
|
|
if (!gst_pad_has_current_caps (demux->priv->srcpad)) {
|
|
GST_INFO_OBJECT (demux, "EOS before we found a type");
|
|
|
|
/* push final buffer with eos indication to force typefinding */
|
|
gst_tag_demux_chain_buffer (demux, gst_buffer_new (), TRUE);
|
|
|
|
if (!gst_pad_has_current_caps (demux->priv->srcpad)) {
|
|
GST_ELEMENT_ERROR (demux, STREAM, TYPE_NOT_FOUND, (NULL), (NULL));
|
|
}
|
|
}
|
|
ret = gst_pad_event_default (pad, parent, event);
|
|
break;
|
|
case GST_EVENT_SEGMENT:
|
|
{
|
|
gst_event_copy_segment (event, &demux->priv->segment);
|
|
|
|
demux->priv->need_newseg = TRUE;
|
|
gst_event_unref (event);
|
|
ret = TRUE;
|
|
break;
|
|
}
|
|
case GST_EVENT_FLUSH_STOP:
|
|
case GST_EVENT_FLUSH_START:
|
|
ret = gst_pad_event_default (pad, parent, event);
|
|
break;
|
|
case GST_EVENT_CAPS:
|
|
/* we drop the caps event. We do typefind and push a new caps event. */
|
|
ret = gst_pad_event_default (pad, parent, event);
|
|
break;
|
|
default:
|
|
if (demux->priv->need_newseg && GST_EVENT_IS_SERIALIZED (event)) {
|
|
/* Cache all events if we have a pending segment, so they don't get
|
|
* lost (esp. tag events) */
|
|
GST_INFO_OBJECT (demux, "caching event: %" GST_PTR_FORMAT, event);
|
|
GST_OBJECT_LOCK (demux);
|
|
demux->priv->pending_events =
|
|
g_list_append (demux->priv->pending_events, event);
|
|
GST_OBJECT_UNLOCK (demux);
|
|
ret = TRUE;
|
|
} else {
|
|
ret = gst_pad_event_default (pad, parent, event);
|
|
}
|
|
break;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static gboolean
|
|
gst_tag_demux_get_upstream_size (GstTagDemux * tagdemux)
|
|
{
|
|
gint64 len;
|
|
|
|
/* Short-cut if we already queried upstream */
|
|
if (tagdemux->priv->upstream_size > 0)
|
|
return TRUE;
|
|
|
|
if (!gst_pad_peer_query_duration (tagdemux->priv->sinkpad, GST_FORMAT_BYTES,
|
|
&len) || len <= 0) {
|
|
return FALSE;
|
|
}
|
|
|
|
tagdemux->priv->upstream_size = len;
|
|
return TRUE;
|
|
}
|
|
|
|
static gboolean
|
|
gst_tag_demux_seek_pull (GstTagDemux * tagdemux, GstEvent * event)
|
|
{
|
|
GstSeekFlags flags;
|
|
GstSeekType start_type, stop_type;
|
|
GstFormat format;
|
|
gboolean flush;
|
|
gdouble rate;
|
|
gint64 start, stop;
|
|
GstSegment seeksegment = { 0, };
|
|
|
|
gst_event_parse_seek (event, &rate, &format, &flags, &start_type, &start,
|
|
&stop_type, &stop);
|
|
|
|
/* we can only seek on bytes */
|
|
if (format != GST_FORMAT_BYTES) {
|
|
GST_DEBUG_OBJECT (tagdemux, "Can only seek on BYTES");
|
|
return FALSE;
|
|
}
|
|
|
|
if (tagdemux->priv->state != GST_TAG_DEMUX_STREAMING) {
|
|
GST_DEBUG_OBJECT (tagdemux, "Can only seek if streaming already");
|
|
return FALSE;
|
|
}
|
|
|
|
switch (start_type) {
|
|
case GST_SEEK_TYPE_SET:
|
|
if (start == -1)
|
|
start = 0;
|
|
start += tagdemux->priv->strip_start;
|
|
break;
|
|
case GST_SEEK_TYPE_END:
|
|
/* Adjust the seek to be relative to the start of any end tag
|
|
* (note: 10 bytes before end is represented by stop=-10) */
|
|
if (start > 0)
|
|
start = 0;
|
|
start -= tagdemux->priv->strip_end;
|
|
break;
|
|
case GST_SEEK_TYPE_NONE:
|
|
default:
|
|
break;
|
|
}
|
|
switch (stop_type) {
|
|
case GST_SEEK_TYPE_SET:
|
|
if (stop != -1) {
|
|
/* -1 means the end of the file, pass it upstream intact */
|
|
stop += tagdemux->priv->strip_start;
|
|
}
|
|
break;
|
|
case GST_SEEK_TYPE_END:
|
|
/* Adjust the seek to be relative to the start of any end tag
|
|
* (note: 10 bytes before end is represented by stop=-10) */
|
|
if (stop > 0)
|
|
stop = 0;
|
|
stop -= tagdemux->priv->strip_end;
|
|
break;
|
|
case GST_SEEK_TYPE_NONE:
|
|
default:
|
|
break;
|
|
}
|
|
|
|
/* copy segment, we need this because we still need the old
|
|
* segment when we close the current segment. */
|
|
memcpy (&seeksegment, &tagdemux->priv->segment, sizeof (GstSegment));
|
|
|
|
GST_DEBUG_OBJECT (tagdemux, "configuring seek");
|
|
gst_segment_do_seek (&seeksegment, rate, format, flags,
|
|
start_type, start, stop_type, stop, NULL);
|
|
|
|
flush = ! !(flags & GST_SEEK_FLAG_FLUSH);
|
|
|
|
GST_DEBUG_OBJECT (tagdemux, "New segment %" GST_SEGMENT_FORMAT, &seeksegment);
|
|
|
|
if (flush) {
|
|
GST_DEBUG_OBJECT (tagdemux, "Starting flush");
|
|
gst_pad_push_event (tagdemux->priv->sinkpad, gst_event_new_flush_start ());
|
|
gst_pad_push_event (tagdemux->priv->srcpad, gst_event_new_flush_start ());
|
|
} else {
|
|
GST_DEBUG_OBJECT (tagdemux, "Non-flushing seek, pausing task");
|
|
gst_pad_pause_task (tagdemux->priv->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_DEBUG_OBJECT (tagdemux, "Waiting for streaming to stop");
|
|
GST_PAD_STREAM_LOCK (tagdemux->priv->sinkpad);
|
|
|
|
if (flush) {
|
|
GST_DEBUG_OBJECT (tagdemux, "Stopping flush");
|
|
gst_pad_push_event (tagdemux->priv->sinkpad,
|
|
gst_event_new_flush_stop (TRUE));
|
|
gst_pad_push_event (tagdemux->priv->srcpad,
|
|
gst_event_new_flush_stop (TRUE));
|
|
}
|
|
|
|
/* now update the real segment info */
|
|
GST_DEBUG_OBJECT (tagdemux, "Committing new seek segment");
|
|
memcpy (&tagdemux->priv->segment, &seeksegment, sizeof (GstSegment));
|
|
tagdemux->priv->offset = tagdemux->priv->segment.start;
|
|
|
|
/* notify start of new segment */
|
|
if (tagdemux->priv->segment.flags & GST_SEGMENT_FLAG_SEGMENT) {
|
|
GstMessage *msg;
|
|
|
|
msg = gst_message_new_segment_start (GST_OBJECT (tagdemux),
|
|
GST_FORMAT_BYTES, tagdemux->priv->segment.start);
|
|
gst_element_post_message (GST_ELEMENT (tagdemux), msg);
|
|
}
|
|
|
|
tagdemux->priv->need_newseg = TRUE;
|
|
|
|
/* restart our task since it might have been stopped when we did the
|
|
* flush. */
|
|
gst_pad_start_task (tagdemux->priv->sinkpad,
|
|
(GstTaskFunction) gst_tag_demux_element_loop, tagdemux, NULL);
|
|
|
|
/* streaming can continue now */
|
|
GST_PAD_STREAM_UNLOCK (tagdemux->priv->sinkpad);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static gboolean
|
|
gst_tag_demux_seek_push (GstTagDemux * tagdemux, GstEvent * event)
|
|
{
|
|
gboolean res = FALSE;
|
|
gdouble rate;
|
|
GstFormat format;
|
|
GstSeekType start_type, stop_type;
|
|
GstSeekFlags flags;
|
|
gint64 start, stop;
|
|
|
|
gst_event_parse_seek (event, &rate, &format, &flags,
|
|
&start_type, &start, &stop_type, &stop);
|
|
|
|
if (format == GST_FORMAT_BYTES &&
|
|
tagdemux->priv->state == GST_TAG_DEMUX_STREAMING &&
|
|
gst_pad_is_linked (tagdemux->priv->sinkpad)) {
|
|
GstEvent *upstream;
|
|
|
|
switch (start_type) {
|
|
case GST_SEEK_TYPE_SET:
|
|
if (start == -1)
|
|
start = 0;
|
|
start += tagdemux->priv->strip_start;
|
|
break;
|
|
case GST_SEEK_TYPE_END:
|
|
/* Adjust the seek to be relative to the start of any end tag
|
|
* (note: 10 bytes before end is represented by stop=-10) */
|
|
if (start > 0)
|
|
start = 0;
|
|
start -= tagdemux->priv->strip_end;
|
|
break;
|
|
case GST_SEEK_TYPE_NONE:
|
|
default:
|
|
break;
|
|
}
|
|
switch (stop_type) {
|
|
case GST_SEEK_TYPE_SET:
|
|
if (stop != -1) {
|
|
/* -1 means the end of the file, pass it upstream intact */
|
|
stop += tagdemux->priv->strip_start;
|
|
}
|
|
break;
|
|
case GST_SEEK_TYPE_END:
|
|
/* Adjust the seek to be relative to the start of any end tag
|
|
* (note: 10 bytes before end is represented by stop=-10) */
|
|
if (stop > 0)
|
|
stop = 0;
|
|
stop -= tagdemux->priv->strip_end;
|
|
break;
|
|
case GST_SEEK_TYPE_NONE:
|
|
default:
|
|
break;
|
|
}
|
|
upstream = gst_event_new_seek (rate, format, flags,
|
|
start_type, start, stop_type, stop);
|
|
res = gst_pad_push_event (tagdemux->priv->sinkpad, upstream);
|
|
} else if (format == GST_FORMAT_TIME &&
|
|
tagdemux->priv->state == GST_TAG_DEMUX_STREAMING &&
|
|
gst_pad_is_linked (tagdemux->priv->sinkpad)) {
|
|
res = gst_pad_push_event (tagdemux->priv->sinkpad, gst_event_ref (event));
|
|
}
|
|
|
|
return res;
|
|
}
|
|
|
|
static gboolean
|
|
gst_tag_demux_srcpad_event (GstPad * pad, GstObject * parent, GstEvent * event)
|
|
{
|
|
GstTagDemux *tagdemux;
|
|
gboolean res = FALSE;
|
|
|
|
tagdemux = GST_TAG_DEMUX (parent);
|
|
|
|
/* Handle SEEK events, with adjusted byte offsets and sizes. */
|
|
|
|
switch (GST_EVENT_TYPE (event)) {
|
|
case GST_EVENT_SEEK:
|
|
{
|
|
if (GST_PAD_MODE (tagdemux->priv->sinkpad) == GST_PAD_MODE_PUSH)
|
|
res = gst_tag_demux_seek_push (tagdemux, event);
|
|
else
|
|
res = gst_tag_demux_seek_pull (tagdemux, event);
|
|
break;
|
|
}
|
|
default:
|
|
res = gst_pad_push_event (tagdemux->priv->sinkpad, event);
|
|
event = NULL;
|
|
break;
|
|
}
|
|
|
|
if (event)
|
|
gst_event_unref (event);
|
|
|
|
return res;
|
|
}
|
|
|
|
/* Read and interpret any end tag when activating in pull_range.
|
|
* Returns FALSE if pad activation should fail. */
|
|
static GstFlowReturn
|
|
gst_tag_demux_pull_end_tag (GstTagDemux * demux, GstTagList ** tags)
|
|
{
|
|
GstTagDemuxResult parse_ret;
|
|
GstTagDemuxClass *klass;
|
|
GstFlowReturn flow_ret;
|
|
GstTagList *new_tags = NULL;
|
|
GstBuffer *buffer = NULL;
|
|
gboolean have_tag;
|
|
guint64 offset;
|
|
guint tagsize;
|
|
gsize bsize;
|
|
|
|
klass = GST_TAG_DEMUX_CLASS (G_OBJECT_GET_CLASS (demux));
|
|
|
|
g_assert (klass->identify_tag != NULL);
|
|
g_assert (klass->parse_tag != NULL);
|
|
|
|
if (klass->min_end_size == 0) {
|
|
GST_DEBUG_OBJECT (demux, "Not looking for tag at the end");
|
|
return GST_FLOW_OK;
|
|
}
|
|
|
|
if (demux->priv->upstream_size < klass->min_end_size) {
|
|
GST_DEBUG_OBJECT (demux, "File too small");
|
|
return GST_FLOW_OK;
|
|
}
|
|
|
|
/* Pull enough to identify the tag and retrieve its total size */
|
|
offset = demux->priv->upstream_size - klass->min_end_size;
|
|
|
|
flow_ret = gst_pad_pull_range (demux->priv->sinkpad, offset,
|
|
klass->min_end_size, &buffer);
|
|
|
|
if (flow_ret != GST_FLOW_OK) {
|
|
GST_DEBUG_OBJECT (demux, "Could not read tag header from end of file, "
|
|
"ret = %s", gst_flow_get_name (flow_ret));
|
|
goto done;
|
|
}
|
|
|
|
bsize = gst_buffer_get_size (buffer);
|
|
|
|
if (bsize < klass->min_end_size) {
|
|
GST_DEBUG_OBJECT (demux, "Only managed to read %" G_GSIZE_FORMAT " bytes"
|
|
"from file (required: %u bytes)", bsize, klass->min_end_size);
|
|
flow_ret = GST_FLOW_EOS;
|
|
goto done;
|
|
}
|
|
|
|
have_tag = klass->identify_tag (demux, buffer, FALSE, &tagsize);
|
|
|
|
if (!have_tag) {
|
|
GST_DEBUG_OBJECT (demux, "Could not find tag at end");
|
|
flow_ret = GST_FLOW_OK;
|
|
goto done;
|
|
}
|
|
|
|
/* Now pull the entire tag */
|
|
do {
|
|
guint newsize, saved_size;
|
|
|
|
GST_DEBUG_OBJECT (demux, "Identified tag at end, size=%u bytes", tagsize);
|
|
|
|
demux->priv->strip_end = tagsize;
|
|
|
|
g_assert (tagsize >= klass->min_end_size);
|
|
|
|
/* Get buffer that's exactly the requested size */
|
|
if (bsize != tagsize) {
|
|
gst_buffer_unref (buffer);
|
|
buffer = NULL;
|
|
|
|
offset = demux->priv->upstream_size - tagsize;
|
|
|
|
flow_ret = gst_pad_pull_range (demux->priv->sinkpad, offset,
|
|
tagsize, &buffer);
|
|
|
|
if (flow_ret != GST_FLOW_OK) {
|
|
GST_DEBUG_OBJECT (demux, "Could not read data from end of file at "
|
|
"offset %" G_GUINT64_FORMAT ". ret = %s", offset,
|
|
gst_flow_get_name (flow_ret));
|
|
goto done;
|
|
}
|
|
|
|
bsize = gst_buffer_get_size (buffer);
|
|
|
|
if (bsize < tagsize) {
|
|
GST_DEBUG_OBJECT (demux, "Only managed to read %" G_GSIZE_FORMAT
|
|
" bytes from file", bsize);
|
|
flow_ret = GST_FLOW_EOS;
|
|
goto done;
|
|
}
|
|
}
|
|
|
|
GST_BUFFER_OFFSET (buffer) = offset;
|
|
|
|
saved_size = bsize;
|
|
gst_buffer_set_size (buffer, tagsize);
|
|
newsize = tagsize;
|
|
|
|
parse_ret = klass->parse_tag (demux, buffer, FALSE, &newsize, &new_tags);
|
|
|
|
gst_buffer_set_size (buffer, saved_size);
|
|
|
|
switch (parse_ret) {
|
|
case GST_TAG_DEMUX_RESULT_OK:
|
|
flow_ret = GST_FLOW_OK;
|
|
demux->priv->strip_end = newsize;
|
|
GST_DEBUG_OBJECT (demux, "Read tag at end, size %d",
|
|
demux->priv->strip_end);
|
|
break;
|
|
case GST_TAG_DEMUX_RESULT_BROKEN_TAG:
|
|
flow_ret = GST_FLOW_OK;
|
|
demux->priv->strip_end = newsize;
|
|
GST_WARNING_OBJECT (demux, "Ignoring broken tag at end, size %d",
|
|
demux->priv->strip_end);
|
|
break;
|
|
case GST_TAG_DEMUX_RESULT_AGAIN:
|
|
GST_DEBUG_OBJECT (demux, "Re-parse, this time with %d bytes", newsize);
|
|
g_assert (newsize != tagsize);
|
|
tagsize = newsize;
|
|
break;
|
|
}
|
|
} while (parse_ret == GST_TAG_DEMUX_RESULT_AGAIN);
|
|
|
|
*tags = new_tags;
|
|
new_tags = NULL;
|
|
|
|
done:
|
|
if (new_tags)
|
|
gst_tag_list_unref (new_tags);
|
|
if (buffer)
|
|
gst_buffer_unref (buffer);
|
|
return flow_ret;
|
|
}
|
|
|
|
/* Read and interpret any tag at the start when activating in
|
|
* pull_range. Returns FALSE if pad activation should fail. */
|
|
static GstFlowReturn
|
|
gst_tag_demux_pull_start_tag (GstTagDemux * demux, GstTagList ** tags)
|
|
{
|
|
GstTagDemuxResult parse_ret;
|
|
GstTagDemuxClass *klass;
|
|
GstFlowReturn flow_ret;
|
|
GstTagList *new_tags = NULL;
|
|
GstBuffer *buffer = NULL;
|
|
gboolean have_tag;
|
|
guint req, tagsize;
|
|
gsize bsize;
|
|
|
|
klass = GST_TAG_DEMUX_CLASS (G_OBJECT_GET_CLASS (demux));
|
|
|
|
g_assert (klass->identify_tag != NULL);
|
|
g_assert (klass->parse_tag != NULL);
|
|
|
|
if (klass->min_start_size == 0) {
|
|
GST_DEBUG_OBJECT (demux, "Not looking for tag at the beginning");
|
|
return GST_FLOW_OK;
|
|
}
|
|
|
|
/* Handle tag at start. Try with 4kB to start with */
|
|
req = MAX (klass->min_start_size, 4096);
|
|
|
|
/* Pull enough to identify the tag and retrieve its total size */
|
|
flow_ret = gst_pad_pull_range (demux->priv->sinkpad, 0, req, &buffer);
|
|
if (flow_ret != GST_FLOW_OK) {
|
|
GST_DEBUG_OBJECT (demux, "Could not read data from start of file ret=%s",
|
|
gst_flow_get_name (flow_ret));
|
|
goto done;
|
|
}
|
|
|
|
bsize = gst_buffer_get_size (buffer);
|
|
|
|
if (bsize < klass->min_start_size) {
|
|
GST_DEBUG_OBJECT (demux, "Only managed to read %" G_GSIZE_FORMAT
|
|
" bytes from file - no tag in this file", bsize);
|
|
flow_ret = GST_FLOW_EOS;
|
|
goto done;
|
|
}
|
|
|
|
have_tag = klass->identify_tag (demux, buffer, TRUE, &tagsize);
|
|
|
|
if (!have_tag) {
|
|
GST_DEBUG_OBJECT (demux, "Could not find start tag");
|
|
flow_ret = GST_FLOW_OK;
|
|
goto done;
|
|
}
|
|
|
|
GST_DEBUG_OBJECT (demux, "Identified start tag, size = %u bytes", tagsize);
|
|
|
|
do {
|
|
guint newsize, saved_size;
|
|
|
|
demux->priv->strip_start = tagsize;
|
|
|
|
/* Now pull the entire tag */
|
|
g_assert (tagsize >= klass->min_start_size);
|
|
|
|
if (bsize < tagsize) {
|
|
gst_buffer_unref (buffer);
|
|
buffer = NULL;
|
|
|
|
flow_ret = gst_pad_pull_range (demux->priv->sinkpad, 0, tagsize, &buffer);
|
|
if (flow_ret != GST_FLOW_OK) {
|
|
GST_DEBUG_OBJECT (demux, "Could not read data from start of file, "
|
|
"ret = %s", gst_flow_get_name (flow_ret));
|
|
goto done;
|
|
}
|
|
|
|
bsize = gst_buffer_get_size (buffer);
|
|
|
|
if (bsize < tagsize) {
|
|
GST_DEBUG_OBJECT (demux, "Only managed to read %" G_GSIZE_FORMAT
|
|
" bytes from file", bsize);
|
|
GST_ELEMENT_ERROR (demux, STREAM, DECODE,
|
|
(_("Failed to read tag: not enough data")), (NULL));
|
|
flow_ret = GST_FLOW_EOS;
|
|
goto done;
|
|
}
|
|
}
|
|
|
|
saved_size = bsize;
|
|
gst_buffer_set_size (buffer, tagsize);
|
|
newsize = tagsize;
|
|
parse_ret = klass->parse_tag (demux, buffer, TRUE, &newsize, &new_tags);
|
|
|
|
gst_buffer_set_size (buffer, saved_size);
|
|
|
|
switch (parse_ret) {
|
|
case GST_TAG_DEMUX_RESULT_OK:
|
|
flow_ret = GST_FLOW_OK;
|
|
demux->priv->strip_start = newsize;
|
|
GST_DEBUG_OBJECT (demux, "Read start tag of size %d", newsize);
|
|
break;
|
|
case GST_TAG_DEMUX_RESULT_BROKEN_TAG:
|
|
flow_ret = GST_FLOW_OK;
|
|
demux->priv->strip_start = newsize;
|
|
GST_WARNING_OBJECT (demux, "Ignoring broken start tag of size %d",
|
|
demux->priv->strip_start);
|
|
break;
|
|
case GST_TAG_DEMUX_RESULT_AGAIN:
|
|
GST_DEBUG_OBJECT (demux, "Re-parse, this time with %d bytes", newsize);
|
|
g_assert (newsize != tagsize);
|
|
tagsize = newsize;
|
|
break;
|
|
}
|
|
} while (parse_ret == GST_TAG_DEMUX_RESULT_AGAIN);
|
|
|
|
*tags = new_tags;
|
|
new_tags = NULL;
|
|
|
|
done:
|
|
if (new_tags)
|
|
gst_tag_list_unref (new_tags);
|
|
if (buffer)
|
|
gst_buffer_unref (buffer);
|
|
return flow_ret;
|
|
}
|
|
|
|
/* This function operates similarly to gst_type_find_element_loop
|
|
* in the typefind element
|
|
* 1. try to read tags in pull mode
|
|
* 2. typefind the contents
|
|
* 3. if we didn't find any caps, fail.
|
|
* 4. set caps on srcpad
|
|
*/
|
|
static GstFlowReturn
|
|
gst_tag_demux_element_find (GstTagDemux * demux)
|
|
{
|
|
GstTagDemuxClass *klass;
|
|
GstTypeFindProbability probability = 0;
|
|
GstFlowReturn ret = GST_FLOW_OK;
|
|
GstTagList *start_tags = NULL;
|
|
GstTagList *end_tags = NULL;
|
|
gboolean e_tag_ok, s_tag_ok;
|
|
GstCaps *caps = NULL;
|
|
|
|
/* Look for tags at start and end of file */
|
|
GST_DEBUG_OBJECT (demux, "Activated pull mode. Looking for tags");
|
|
if (!gst_tag_demux_get_upstream_size (demux))
|
|
goto no_size;
|
|
|
|
demux->priv->strip_start = 0;
|
|
demux->priv->strip_end = 0;
|
|
|
|
/* 1 - Read tags */
|
|
ret = gst_tag_demux_pull_start_tag (demux, &start_tags);
|
|
if (ret != GST_FLOW_OK && ret != GST_FLOW_EOS)
|
|
goto read_tag_error;
|
|
s_tag_ok = ret == GST_FLOW_OK;
|
|
ret = gst_tag_demux_pull_end_tag (demux, &end_tags);
|
|
if (ret != GST_FLOW_OK && ret != GST_FLOW_EOS)
|
|
goto read_tag_error;
|
|
e_tag_ok = ret == GST_FLOW_OK;
|
|
ret = GST_FLOW_OK;
|
|
|
|
klass = GST_TAG_DEMUX_CLASS (G_OBJECT_GET_CLASS (demux));
|
|
|
|
if (klass->merge_tags != NULL) {
|
|
demux->priv->parsed_tags = klass->merge_tags (demux, start_tags, end_tags);
|
|
} else {
|
|
/* we merge in REPLACE mode, so put the less important tags first, which
|
|
* we'll just assume is the end tag (subclasses may change this behaviour
|
|
* or make it configurable by overriding the merge_tags vfunc) */
|
|
demux->priv->parsed_tags =
|
|
gst_tag_list_merge (end_tags, start_tags, GST_TAG_MERGE_REPLACE);
|
|
}
|
|
|
|
if (start_tags)
|
|
gst_tag_list_unref (start_tags);
|
|
if (end_tags)
|
|
gst_tag_list_unref (end_tags);
|
|
|
|
/* Only happens if both are EOS, i.e. not enough data could be read */
|
|
if (!e_tag_ok && !s_tag_ok)
|
|
goto no_tags;
|
|
|
|
if (demux->priv->parsed_tags != NULL) {
|
|
demux->priv->send_tag_event = TRUE;
|
|
}
|
|
|
|
if (demux->priv->upstream_size <=
|
|
demux->priv->strip_start + demux->priv->strip_end)
|
|
goto no_data;
|
|
|
|
/* 2 - Do typefinding on data, but not if downstream is in charge */
|
|
if (GST_PAD_MODE (demux->priv->srcpad) == GST_PAD_MODE_PULL)
|
|
goto skip_typefinding;
|
|
|
|
ret = gst_type_find_helper_get_range_full (GST_OBJECT (demux), NULL,
|
|
(GstTypeFindHelperGetRangeFunction) gst_tag_demux_read_range,
|
|
demux->priv->upstream_size
|
|
- (demux->priv->strip_start + demux->priv->strip_end), NULL,
|
|
&caps, &probability);
|
|
if (ret != GST_FLOW_OK)
|
|
goto read_tag_error;
|
|
|
|
GST_INFO_OBJECT (demux, "Found type %" GST_PTR_FORMAT " with a "
|
|
"probability of %u", caps, probability);
|
|
|
|
/* 3 - If we didn't find the caps, fail */
|
|
if (caps == NULL)
|
|
goto no_caps;
|
|
|
|
/* tag reading and typefinding were already done, don't do them again in
|
|
* the chain function if we end up in push mode */
|
|
demux->priv->state = GST_TAG_DEMUX_STREAMING;
|
|
|
|
/* 6 Set the srcpad caps now that we know them */
|
|
gst_tag_demux_set_src_caps (demux, caps);
|
|
gst_caps_unref (caps);
|
|
|
|
skip_typefinding:
|
|
|
|
/* set it again, in case we skipped typefinding */
|
|
demux->priv->state = GST_TAG_DEMUX_STREAMING;
|
|
demux->priv->offset += demux->priv->strip_start;
|
|
|
|
return ret;
|
|
|
|
/* ERRORS */
|
|
no_size:
|
|
{
|
|
GST_ELEMENT_ERROR (demux, STREAM, TYPE_NOT_FOUND,
|
|
("Could not get stream size"), (NULL));
|
|
return GST_FLOW_ERROR;
|
|
}
|
|
read_tag_error:
|
|
{
|
|
if (ret == GST_FLOW_NOT_LINKED || ret < GST_FLOW_EOS)
|
|
GST_ELEMENT_FLOW_ERROR (demux, ret);
|
|
return ret;
|
|
}
|
|
no_tags:
|
|
{
|
|
GST_ELEMENT_ERROR (demux, STREAM, TYPE_NOT_FOUND,
|
|
("Could not get start and/or end tag"), (NULL));
|
|
return GST_FLOW_ERROR;
|
|
}
|
|
no_data:
|
|
{
|
|
/* There was no data (probably due to a truncated file) */
|
|
/* so we don't know about type either */
|
|
GST_ELEMENT_ERROR (demux, STREAM, TYPE_NOT_FOUND, ("No data in file"),
|
|
(NULL));
|
|
return GST_FLOW_ERROR;
|
|
}
|
|
no_caps:
|
|
{
|
|
GST_ELEMENT_ERROR (demux, STREAM, TYPE_NOT_FOUND,
|
|
("Could not detect type of contents"), (NULL));
|
|
return GST_FLOW_ERROR;
|
|
}
|
|
}
|
|
|
|
/* This function operates similarly to gst_type_find_element_loop
|
|
* in the typefind element
|
|
* 1. try to read tags in pull mode
|
|
* 2. typefind the contents
|
|
* 3. if we didn't find any caps, fail.
|
|
* 4. set caps on srcpad
|
|
*/
|
|
static void
|
|
gst_tag_demux_element_loop (GstTagDemux * demux)
|
|
{
|
|
GstFlowReturn ret;
|
|
|
|
switch (demux->priv->state) {
|
|
case GST_TAG_DEMUX_READ_START_TAG:
|
|
case GST_TAG_DEMUX_TYPEFINDING:
|
|
ret = gst_tag_demux_element_find (demux);
|
|
break;
|
|
case GST_TAG_DEMUX_STREAMING:
|
|
{
|
|
GstBuffer *outbuf = NULL;
|
|
|
|
if (demux->priv->need_newseg) {
|
|
demux->priv->need_newseg = FALSE;
|
|
/* FIXME: check segment, should be 0-N for downstream */
|
|
gst_tag_demux_send_new_segment (demux);
|
|
}
|
|
|
|
/* Send our own pending tag event */
|
|
if (demux->priv->send_tag_event) {
|
|
gst_tag_demux_send_tag_event (demux);
|
|
demux->priv->send_tag_event = FALSE;
|
|
}
|
|
|
|
/* Pull data and push it downstream */
|
|
ret = gst_pad_pull_range (demux->priv->sinkpad, demux->priv->offset,
|
|
DEFAULT_PULL_BLOCKSIZE, &outbuf);
|
|
|
|
if (ret != GST_FLOW_OK)
|
|
break;
|
|
|
|
GST_BUFFER_OFFSET (outbuf) =
|
|
demux->priv->offset - demux->priv->strip_start;
|
|
demux->priv->offset += gst_buffer_get_size (outbuf);
|
|
GST_BUFFER_OFFSET_END (outbuf) =
|
|
demux->priv->offset - demux->priv->strip_start;
|
|
|
|
ret = gst_pad_push (demux->priv->srcpad, outbuf);
|
|
break;
|
|
}
|
|
default:
|
|
ret = GST_FLOW_ERROR;
|
|
break;
|
|
}
|
|
if (ret != GST_FLOW_OK)
|
|
goto pause;
|
|
|
|
return;
|
|
|
|
/* ERRORS */
|
|
pause:
|
|
{
|
|
const gchar *reason = gst_flow_get_name (ret);
|
|
gboolean push_eos = FALSE;
|
|
|
|
GST_LOG_OBJECT (demux, "pausing task, reason %s", reason);
|
|
gst_pad_pause_task (demux->priv->sinkpad);
|
|
|
|
if (ret == GST_FLOW_EOS) {
|
|
/* perform EOS logic */
|
|
|
|
if (demux->priv->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 = demux->priv->segment.stop) == -1)
|
|
stop = demux->priv->offset;
|
|
|
|
GST_LOG_OBJECT (demux, "Sending segment done, at end of segment");
|
|
gst_element_post_message (GST_ELEMENT_CAST (demux),
|
|
gst_message_new_segment_done (GST_OBJECT_CAST (demux),
|
|
GST_FORMAT_BYTES, stop));
|
|
gst_pad_push_event (demux->priv->srcpad,
|
|
gst_event_new_segment_done (GST_FORMAT_BYTES, stop));
|
|
} else {
|
|
push_eos = TRUE;
|
|
}
|
|
} else if (ret == GST_FLOW_NOT_LINKED || ret < GST_FLOW_EOS) {
|
|
/* for fatal errors we post an error message */
|
|
GST_ELEMENT_FLOW_ERROR (demux, ret);
|
|
push_eos = TRUE;
|
|
}
|
|
if (push_eos) {
|
|
/* send EOS, and prevent hanging if no streams yet */
|
|
GST_LOG_OBJECT (demux, "Sending EOS, at end of stream");
|
|
gst_pad_push_event (demux->priv->srcpad, gst_event_new_eos ());
|
|
}
|
|
return;
|
|
}
|
|
}
|
|
|
|
static gboolean
|
|
gst_tag_demux_sink_activate_mode (GstPad * pad, GstObject * parent,
|
|
GstPadMode mode, gboolean active)
|
|
{
|
|
GstTagDemux *demux = GST_TAG_DEMUX (parent);
|
|
gboolean res;
|
|
|
|
switch (mode) {
|
|
case GST_PAD_MODE_PULL:
|
|
if (active) {
|
|
demux->priv->need_newseg = TRUE;
|
|
demux->priv->offset = 0;
|
|
res = TRUE;
|
|
} else {
|
|
res = gst_pad_stop_task (pad);
|
|
}
|
|
break;
|
|
default:
|
|
res = TRUE;
|
|
break;
|
|
}
|
|
|
|
if (active)
|
|
GST_TAG_DEMUX (parent)->priv->state = GST_TAG_DEMUX_READ_START_TAG;
|
|
|
|
return res;
|
|
}
|
|
|
|
static gboolean
|
|
gst_tag_demux_sink_activate (GstPad * sinkpad, GstObject * parent)
|
|
{
|
|
GstTagDemux *demux;
|
|
GstQuery *query;
|
|
gboolean pull_mode;
|
|
|
|
demux = GST_TAG_DEMUX (parent);
|
|
|
|
/* 1: */
|
|
/* If we can activate pull_range upstream, then read any end and start
|
|
* tags, otherwise activate in push mode and the chain function will
|
|
* collect buffers, read the start tag and output a buffer to end
|
|
* preroll.
|
|
*/
|
|
query = gst_query_new_scheduling ();
|
|
|
|
if (!gst_pad_peer_query (sinkpad, query)) {
|
|
gst_query_unref (query);
|
|
goto activate_push;
|
|
}
|
|
|
|
pull_mode = gst_query_has_scheduling_mode_with_flags (query,
|
|
GST_PAD_MODE_PULL, GST_SCHEDULING_FLAG_SEEKABLE);
|
|
gst_query_unref (query);
|
|
|
|
if (!pull_mode)
|
|
goto activate_push;
|
|
|
|
if (!gst_pad_activate_mode (sinkpad, GST_PAD_MODE_PULL, TRUE))
|
|
goto activate_push;
|
|
|
|
/* only start our task if we ourselves decide to start in pull mode */
|
|
return gst_pad_start_task (sinkpad,
|
|
(GstTaskFunction) gst_tag_demux_element_loop, demux, NULL);
|
|
|
|
activate_push:
|
|
{
|
|
GST_DEBUG_OBJECT (demux, "No pull mode. Changing to push, but won't be "
|
|
"able to read end tags");
|
|
return gst_pad_activate_mode (sinkpad, GST_PAD_MODE_PUSH, TRUE);
|
|
}
|
|
}
|
|
|
|
static gboolean
|
|
gst_tag_demux_src_activate_mode (GstPad * pad, GstObject * parent,
|
|
GstPadMode mode, gboolean active)
|
|
{
|
|
gboolean res;
|
|
GstTagDemux *demux = GST_TAG_DEMUX (parent);
|
|
|
|
switch (mode) {
|
|
case GST_PAD_MODE_PULL:
|
|
/* make sure our task stops pushing, we can't call _stop here
|
|
* because this activation might happen from the streaming thread. */
|
|
gst_pad_pause_task (demux->priv->sinkpad);
|
|
res = gst_pad_activate_mode (demux->priv->sinkpad, mode, active);
|
|
break;
|
|
default:
|
|
res = TRUE;
|
|
break;
|
|
}
|
|
return res;
|
|
}
|
|
|
|
static inline GstFlowReturn
|
|
gst_tag_demux_ensure_tags (GstTagDemux * demux)
|
|
{
|
|
GstFlowReturn flow = GST_FLOW_OK;
|
|
|
|
if (G_UNLIKELY (demux->priv->state == GST_TAG_DEMUX_READ_START_TAG &&
|
|
GST_PAD_MODE (demux->priv->srcpad) == GST_PAD_MODE_PULL)) {
|
|
|
|
flow = gst_tag_demux_element_find (demux);
|
|
GST_INFO_OBJECT (demux, "pulled tags: %s", gst_flow_get_name (flow));
|
|
}
|
|
return flow;
|
|
}
|
|
|
|
static GstFlowReturn
|
|
gst_tag_demux_read_range (GstTagDemux * demux, GstObject * parent,
|
|
guint64 offset, guint length, GstBuffer ** buffer)
|
|
{
|
|
GstFlowReturn ret;
|
|
guint64 in_offset;
|
|
guint in_length;
|
|
gsize size;
|
|
|
|
g_return_val_if_fail (buffer != NULL, GST_FLOW_ERROR);
|
|
|
|
/* Ensure we already have computed our tags to properly use the offsets
|
|
* below */
|
|
ret = gst_tag_demux_ensure_tags (demux);
|
|
if (ret != GST_FLOW_OK)
|
|
return ret;
|
|
|
|
/* Adjust offset and length of the request to trim off tag information.
|
|
* For the returned buffer, adjust the output offset to match what downstream
|
|
* should see */
|
|
in_offset = offset + demux->priv->strip_start;
|
|
|
|
if (!gst_tag_demux_get_upstream_size (demux))
|
|
return GST_FLOW_ERROR;
|
|
|
|
if (in_offset + length >= demux->priv->upstream_size - demux->priv->strip_end) {
|
|
if (in_offset + demux->priv->strip_end >= demux->priv->upstream_size)
|
|
return GST_FLOW_EOS;
|
|
in_length = demux->priv->upstream_size - demux->priv->strip_end - in_offset;
|
|
} else {
|
|
in_length = length;
|
|
}
|
|
|
|
ret = gst_pad_pull_range (demux->priv->sinkpad, in_offset, in_length, buffer);
|
|
|
|
if (ret == GST_FLOW_OK && *buffer) {
|
|
if (!gst_tag_demux_trim_buffer (demux, buffer, &size))
|
|
goto read_beyond_end;
|
|
|
|
/* this should only happen in streaming mode */
|
|
g_assert (*buffer != NULL);
|
|
}
|
|
|
|
return ret;
|
|
|
|
read_beyond_end:
|
|
{
|
|
GST_DEBUG_OBJECT (demux, "attempted read beyond end of file");
|
|
if (*buffer != NULL) {
|
|
gst_buffer_unref (*buffer);
|
|
*buffer = NULL;
|
|
}
|
|
return GST_FLOW_EOS;
|
|
}
|
|
}
|
|
|
|
static GstFlowReturn
|
|
gst_tag_demux_src_getrange (GstPad * srcpad, GstObject * parent,
|
|
guint64 offset, guint length, GstBuffer ** buffer)
|
|
{
|
|
GstTagDemux *demux = GST_TAG_DEMUX (parent);
|
|
|
|
/* downstream in pull mode won't miss a newsegment event,
|
|
* but it likely appreciates other (tag) events */
|
|
if (demux->priv->need_newseg) {
|
|
gst_tag_demux_send_pending_events (demux);
|
|
demux->priv->need_newseg = FALSE;
|
|
}
|
|
|
|
if (demux->priv->send_tag_event) {
|
|
gst_tag_demux_send_tag_event (demux);
|
|
demux->priv->send_tag_event = FALSE;
|
|
}
|
|
|
|
return gst_tag_demux_read_range (demux, NULL, offset, length, buffer);
|
|
}
|
|
|
|
static GstStateChangeReturn
|
|
gst_tag_demux_change_state (GstElement * element, GstStateChange transition)
|
|
{
|
|
GstStateChangeReturn ret;
|
|
GstTagDemux *demux = GST_TAG_DEMUX (element);
|
|
|
|
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
|
|
|
|
switch (transition) {
|
|
case GST_STATE_CHANGE_PAUSED_TO_READY:
|
|
/* Ensure that nothing is in any of the streaming thread functions
|
|
* anymore. While the above has deactivated all pads, there is nothing
|
|
* preventing downstream from activating our srcpad again and calling the
|
|
* getrange() function. Although we're in READY!
|
|
*/
|
|
GST_PAD_STREAM_LOCK (demux->priv->srcpad);
|
|
gst_tag_demux_reset (demux);
|
|
GST_PAD_STREAM_UNLOCK (demux->priv->srcpad);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static gboolean
|
|
gst_tag_demux_pad_query (GstPad * pad, GstObject * parent, GstQuery * query)
|
|
{
|
|
/* For a position or duration query, adjust the returned
|
|
* bytes to strip off the end and start areas */
|
|
GstTagDemux *demux = GST_TAG_DEMUX (parent);
|
|
GstFormat format;
|
|
gint64 result;
|
|
gboolean res = TRUE;
|
|
|
|
/* FIXME: locking ? */
|
|
switch (GST_QUERY_TYPE (query)) {
|
|
case GST_QUERY_SCHEDULING:
|
|
res = gst_pad_peer_query (demux->priv->sinkpad, query);
|
|
break;
|
|
case GST_QUERY_POSITION:
|
|
{
|
|
if (!(res = gst_pad_peer_query (demux->priv->sinkpad, query)))
|
|
goto done;
|
|
|
|
gst_query_parse_position (query, &format, &result);
|
|
if (format == GST_FORMAT_BYTES) {
|
|
result -= demux->priv->strip_start;
|
|
gst_query_set_position (query, format, result);
|
|
}
|
|
break;
|
|
}
|
|
case GST_QUERY_DURATION:
|
|
{
|
|
if (!(res = gst_pad_peer_query (demux->priv->sinkpad, query)))
|
|
goto done;
|
|
|
|
gst_query_parse_duration (query, &format, &result);
|
|
if (format == GST_FORMAT_BYTES) {
|
|
/* if downstream activated us in pull mode right away, e.g. in case of
|
|
* filesrc ! id3demux ! xyzparse ! .., read tags here, since we don't
|
|
* have a streaming thread of our own to do that. We do it here and
|
|
* not in get_range(), so we can return the right size in bytes.. */
|
|
gst_tag_demux_ensure_tags (demux);
|
|
result -= demux->priv->strip_start + demux->priv->strip_end;
|
|
if (result < 0)
|
|
result = 0;
|
|
gst_query_set_duration (query, format, result);
|
|
}
|
|
break;
|
|
}
|
|
default:
|
|
res = gst_pad_query_default (pad, parent, query);
|
|
break;
|
|
}
|
|
done:
|
|
return res;
|
|
}
|
|
|
|
static void
|
|
gst_tag_demux_send_pending_events (GstTagDemux * demux)
|
|
{
|
|
GList *events;
|
|
|
|
/* send any pending events we cached */
|
|
GST_OBJECT_LOCK (demux);
|
|
events = demux->priv->pending_events;
|
|
demux->priv->pending_events = NULL;
|
|
GST_OBJECT_UNLOCK (demux);
|
|
|
|
while (events != NULL) {
|
|
GST_DEBUG_OBJECT (demux->priv->srcpad, "sending cached %s event: %"
|
|
GST_PTR_FORMAT, GST_EVENT_TYPE_NAME (events->data), events->data);
|
|
gst_pad_push_event (demux->priv->srcpad, GST_EVENT (events->data));
|
|
events = g_list_delete_link (events, events);
|
|
}
|
|
}
|
|
|
|
static void
|
|
gst_tag_demux_send_tag_event (GstTagDemux * demux)
|
|
{
|
|
/* FIXME: what's the correct merge mode? Docs need to tell... */
|
|
GstTagList *merged = gst_tag_list_merge (demux->priv->event_tags,
|
|
demux->priv->parsed_tags, GST_TAG_MERGE_KEEP);
|
|
|
|
if (merged) {
|
|
GstEvent *event = gst_event_new_tag (merged);
|
|
|
|
GST_DEBUG_OBJECT (demux, "Sending tag event on src pad");
|
|
gst_pad_push_event (demux->priv->srcpad, event);
|
|
}
|
|
}
|
|
|
|
static gboolean
|
|
gst_tag_demux_send_new_segment (GstTagDemux * tagdemux)
|
|
{
|
|
GstEvent *event;
|
|
gint64 start, stop, time;
|
|
GstSegment *seg = &tagdemux->priv->segment;
|
|
GstSegment newseg;
|
|
|
|
if (seg->format == GST_FORMAT_UNDEFINED) {
|
|
GST_LOG_OBJECT (tagdemux,
|
|
"No new segment received before first buffer. Using default");
|
|
gst_segment_init (seg, GST_FORMAT_BYTES);
|
|
seg->start = tagdemux->priv->strip_start;
|
|
seg->time = tagdemux->priv->strip_start;
|
|
}
|
|
|
|
/* Can't adjust segments in non-BYTES formats */
|
|
if (tagdemux->priv->segment.format != GST_FORMAT_BYTES) {
|
|
event = gst_event_new_segment (seg);
|
|
return gst_pad_push_event (tagdemux->priv->srcpad, event);
|
|
}
|
|
|
|
start = seg->start;
|
|
stop = seg->stop;
|
|
time = seg->time;
|
|
|
|
g_return_val_if_fail (start != -1, FALSE);
|
|
g_return_val_if_fail (time != -1, FALSE);
|
|
|
|
if (tagdemux->priv->strip_end > 0) {
|
|
if (gst_tag_demux_get_upstream_size (tagdemux)) {
|
|
guint64 v1tag_offset =
|
|
tagdemux->priv->upstream_size - tagdemux->priv->strip_end;
|
|
|
|
if (start >= v1tag_offset) {
|
|
/* Segment is completely within the end tag, output an open-ended
|
|
* segment, even though all the buffers will get trimmed away */
|
|
start = v1tag_offset;
|
|
stop = -1;
|
|
}
|
|
|
|
if (stop != -1 && stop >= v1tag_offset) {
|
|
GST_DEBUG_OBJECT (tagdemux,
|
|
"Segment crosses the end tag. Trimming end");
|
|
stop = v1tag_offset;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (tagdemux->priv->strip_start > 0) {
|
|
if (start > tagdemux->priv->strip_start)
|
|
start -= tagdemux->priv->strip_start;
|
|
else
|
|
start = 0;
|
|
|
|
if (time > tagdemux->priv->strip_start)
|
|
time -= tagdemux->priv->strip_start;
|
|
else
|
|
time = 0;
|
|
|
|
if (stop != -1) {
|
|
if (stop > tagdemux->priv->strip_start)
|
|
stop -= tagdemux->priv->strip_start;
|
|
else
|
|
stop = 0;
|
|
}
|
|
}
|
|
|
|
GST_DEBUG_OBJECT (tagdemux, "Sending segment %" GST_SEGMENT_FORMAT, seg);
|
|
|
|
gst_segment_copy_into (seg, &newseg);
|
|
newseg.start = start;
|
|
newseg.stop = stop;
|
|
newseg.time = time;
|
|
event = gst_event_new_segment (&newseg);
|
|
|
|
return gst_pad_push_event (tagdemux->priv->srcpad, event);
|
|
}
|