+++ /dev/null
-/* GStreamer tag muxer base class
- * Copyright (C) 2006 Christophe Fergeau <teuf@gnome.org>
- * Copyright (C) 2006 Tim-Philipp Müller <tim centricular net>
- * Copyright (C) 2006 Sebastian Dröge <slomo@circular-chaos.org>
- * Copyright (C) 2009 Pioneers of the Inevitable <songbird@songbirdnest.com>
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Library General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Library General Public License for more details.
- *
- * You should have received a copy of the GNU Library General Public
- * License along with this library; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 02111-1307, USA.
- */
-
-/**
- * FIXME: documentation
- *
- * Since: 0.10.36
- */
-#ifdef HAVE_CONFIG_H
-#include <config.h>
-#endif
-
-#include <string.h>
-#include <gst/gsttagsetter.h>
-#include <gst/tag/tag.h>
-
-#include "gsttagmux.h"
-
-struct _GstTagMuxPrivate
-{
- GstPad *srcpad;
- GstPad *sinkpad;
- GstTagList *event_tags; /* tags received from upstream elements */
- GstTagList *final_tags; /* Final set of tags used for muxing */
- gsize start_tag_size;
- gsize end_tag_size;
- gboolean render_start_tag;
- gboolean render_end_tag;
-
- gint64 current_offset;
- gint64 max_offset;
-
- GstEvent *newsegment_ev; /* cached newsegment event from upstream */
-};
-
-GST_DEBUG_CATEGORY_STATIC (gst_tag_mux_debug);
-#define GST_CAT_DEFAULT gst_tag_mux_debug
-
-static void
-gst_tag_mux_iface_init (GType tag_type)
-{
- static const GInterfaceInfo tag_setter_info = {
- NULL,
- NULL,
- NULL
- };
-
- g_type_add_interface_static (tag_type, GST_TYPE_TAG_SETTER, &tag_setter_info);
-}
-
-/* make sure to register a less generic type so we can easily move this
- * GstTagMux base class into -base without causing GType name conflicts */
-typedef GstTagMux GstId3BaseMux;
-typedef GstTagMuxClass GstId3BaseMuxClass;
-
-GST_BOILERPLATE_FULL (GstId3BaseMux, gst_tag_mux,
- GstElement, GST_TYPE_ELEMENT, gst_tag_mux_iface_init);
-
-
-static GstStateChangeReturn
-gst_tag_mux_change_state (GstElement * element, GstStateChange transition);
-static GstFlowReturn gst_tag_mux_chain (GstPad * pad, GstBuffer * buffer);
-static gboolean gst_tag_mux_sink_event (GstPad * pad, GstEvent * event);
-
-static void
-gst_tag_mux_finalize (GObject * obj)
-{
- GstTagMux *mux = GST_TAG_MUX (obj);
-
- if (mux->priv->newsegment_ev) {
- gst_event_unref (mux->priv->newsegment_ev);
- mux->priv->newsegment_ev = NULL;
- }
-
- if (mux->priv->event_tags) {
- gst_tag_list_free (mux->priv->event_tags);
- mux->priv->event_tags = NULL;
- }
-
- if (mux->priv->final_tags) {
- gst_tag_list_free (mux->priv->final_tags);
- mux->priv->final_tags = NULL;
- }
-
- G_OBJECT_CLASS (parent_class)->finalize (obj);
-}
-
-static void
-gst_tag_mux_base_init (gpointer g_class)
-{
- GST_DEBUG_CATEGORY_INIT (gst_tag_mux_debug, "id3basemux", 0,
- "tag muxer base class for Id3Mux");
-}
-
-static void
-gst_tag_mux_class_init (GstTagMuxClass * klass)
-{
- GObjectClass *gobject_class;
- GstElementClass *gstelement_class;
-
- gobject_class = (GObjectClass *) klass;
- gstelement_class = (GstElementClass *) klass;
-
- gobject_class->finalize = GST_DEBUG_FUNCPTR (gst_tag_mux_finalize);
- gstelement_class->change_state = GST_DEBUG_FUNCPTR (gst_tag_mux_change_state);
-
- g_type_class_add_private (klass, sizeof (GstTagMuxPrivate));
-}
-
-static void
-gst_tag_mux_init (GstTagMux * mux, GstTagMuxClass * mux_class)
-{
- GstElementClass *element_klass = GST_ELEMENT_CLASS (mux_class);
- GstPadTemplate *tmpl;
-
- mux->priv =
- G_TYPE_INSTANCE_GET_PRIVATE (mux, GST_TYPE_TAG_MUX, GstTagMuxPrivate);
-
- /* pad through which data comes in to the element */
- tmpl = gst_element_class_get_pad_template (element_klass, "sink");
- if (tmpl) {
- mux->priv->sinkpad = gst_pad_new_from_template (tmpl, "sink");
- } else {
- g_warning ("GstTagMux subclass '%s' did not install a %s pad template!\n",
- G_OBJECT_CLASS_NAME (mux_class), "sink");
- mux->priv->sinkpad = gst_pad_new ("sink", GST_PAD_SINK);
- }
- gst_pad_set_chain_function (mux->priv->sinkpad,
- GST_DEBUG_FUNCPTR (gst_tag_mux_chain));
- gst_pad_set_event_function (mux->priv->sinkpad,
- GST_DEBUG_FUNCPTR (gst_tag_mux_sink_event));
- gst_element_add_pad (GST_ELEMENT (mux), mux->priv->sinkpad);
-
- /* pad through which data goes out of the element */
- tmpl = gst_element_class_get_pad_template (element_klass, "src");
- if (tmpl) {
- GstCaps *tmpl_caps = gst_pad_template_get_caps (tmpl);
-
- mux->priv->srcpad = gst_pad_new_from_template (tmpl, "src");
- gst_pad_use_fixed_caps (mux->priv->srcpad);
- if (tmpl_caps != NULL && gst_caps_is_fixed (tmpl_caps)) {
- gst_pad_set_caps (mux->priv->srcpad, tmpl_caps);
- }
- } else {
- g_warning ("GstTagMux subclass '%s' did not install a %s pad template!\n",
- G_OBJECT_CLASS_NAME (mux_class), "source");
- mux->priv->srcpad = gst_pad_new ("src", GST_PAD_SRC);
- }
- gst_element_add_pad (GST_ELEMENT (mux), mux->priv->srcpad);
-
- mux->priv->render_start_tag = TRUE;
- mux->priv->render_end_tag = TRUE;
-}
-
-static GstTagList *
-gst_tag_mux_get_tags (GstTagMux * mux)
-{
- GstTagSetter *tagsetter = GST_TAG_SETTER (mux);
- const GstTagList *tagsetter_tags;
- GstTagMergeMode merge_mode;
-
- if (mux->priv->final_tags)
- return mux->priv->final_tags;
-
- tagsetter_tags = gst_tag_setter_get_tag_list (tagsetter);
- merge_mode = gst_tag_setter_get_tag_merge_mode (tagsetter);
-
- GST_LOG_OBJECT (mux, "merging tags, merge mode = %d", merge_mode);
- GST_LOG_OBJECT (mux, "event tags: %" GST_PTR_FORMAT, mux->priv->event_tags);
- GST_LOG_OBJECT (mux, "set tags: %" GST_PTR_FORMAT, tagsetter_tags);
-
- mux->priv->final_tags =
- gst_tag_list_merge (tagsetter_tags, mux->priv->event_tags, merge_mode);
-
- GST_LOG_OBJECT (mux, "final tags: %" GST_PTR_FORMAT, mux->priv->final_tags);
-
- return mux->priv->final_tags;
-}
-
-static GstFlowReturn
-gst_tag_mux_render_start_tag (GstTagMux * mux)
-{
- GstTagMuxClass *klass;
- GstBuffer *buffer;
- GstTagList *taglist;
- GstEvent *event;
- GstFlowReturn ret;
-
- taglist = gst_tag_mux_get_tags (mux);
-
- klass = GST_TAG_MUX_CLASS (G_OBJECT_GET_CLASS (mux));
-
- if (klass->render_start_tag == NULL)
- goto no_vfunc;
-
- buffer = klass->render_start_tag (mux, taglist);
-
- /* Null buffer is ok, just means we're not outputting anything */
- if (buffer == NULL) {
- GST_INFO_OBJECT (mux, "No start tag generated");
- mux->priv->start_tag_size = 0;
- return GST_FLOW_OK;
- }
-
- if (GST_BUFFER_CAPS (buffer) == NULL) {
- buffer = gst_buffer_make_metadata_writable (buffer);
- gst_buffer_set_caps (buffer, GST_PAD_CAPS (mux->priv->srcpad));
- }
-
- mux->priv->start_tag_size = GST_BUFFER_SIZE (buffer);
- GST_LOG_OBJECT (mux, "tag size = %" G_GSIZE_FORMAT " bytes",
- mux->priv->start_tag_size);
-
- /* Send newsegment event from byte position 0, so the tag really gets
- * written to the start of the file, independent of the upstream segment */
- gst_pad_push_event (mux->priv->srcpad,
- gst_event_new_new_segment (FALSE, 1.0, GST_FORMAT_BYTES, 0, -1, 0));
-
- /* Send an event about the new tags to downstream elements */
- /* gst_event_new_tag takes ownership of the list, so use a copy */
- event = gst_event_new_tag (gst_tag_list_copy (taglist));
- gst_pad_push_event (mux->priv->srcpad, event);
-
- GST_BUFFER_OFFSET (buffer) = 0;
- ret = gst_pad_push (mux->priv->srcpad, buffer);
-
- mux->priv->current_offset = mux->priv->start_tag_size;
- mux->priv->max_offset =
- MAX (mux->priv->max_offset, mux->priv->current_offset);
-
- return ret;
-
-no_vfunc:
- {
- GST_ERROR_OBJECT (mux, "Subclass does not implement "
- "render_start_tag vfunc!");
- return GST_FLOW_ERROR;
- }
-}
-
-static GstFlowReturn
-gst_tag_mux_render_end_tag (GstTagMux * mux)
-{
- GstTagMuxClass *klass;
- GstBuffer *buffer;
- GstTagList *taglist;
- GstFlowReturn ret;
-
- taglist = gst_tag_mux_get_tags (mux);
-
- klass = GST_TAG_MUX_CLASS (G_OBJECT_GET_CLASS (mux));
-
- if (klass->render_end_tag == NULL)
- goto no_vfunc;
-
- buffer = klass->render_end_tag (mux, taglist);
-
- if (buffer == NULL) {
- GST_INFO_OBJECT (mux, "No end tag generated");
- mux->priv->end_tag_size = 0;
- return GST_FLOW_OK;
- }
-
- if (GST_BUFFER_CAPS (buffer) == NULL) {
- buffer = gst_buffer_make_metadata_writable (buffer);
- gst_buffer_set_caps (buffer, GST_PAD_CAPS (mux->priv->srcpad));
- }
-
- mux->priv->end_tag_size = GST_BUFFER_SIZE (buffer);
- GST_LOG_OBJECT (mux, "tag size = %" G_GSIZE_FORMAT " bytes",
- mux->priv->end_tag_size);
-
- /* Send newsegment event from the end of the file, so it gets written there,
- independent of whatever new segment events upstream has sent us */
- gst_pad_push_event (mux->priv->srcpad,
- gst_event_new_new_segment (FALSE, 1.0, GST_FORMAT_BYTES,
- mux->priv->max_offset, -1, 0));
-
- GST_BUFFER_OFFSET (buffer) = mux->priv->max_offset;
- ret = gst_pad_push (mux->priv->srcpad, buffer);
-
- return ret;
-
-no_vfunc:
- {
- GST_ERROR_OBJECT (mux, "Subclass does not implement "
- "render_end_tag vfunc!");
- return GST_FLOW_ERROR;
- }
-}
-
-static GstEvent *
-gst_tag_mux_adjust_event_offsets (GstTagMux * mux,
- const GstEvent * newsegment_event)
-{
- GstFormat format;
- gint64 start, stop, cur;
-
- gst_event_parse_new_segment ((GstEvent *) newsegment_event, NULL, NULL,
- &format, &start, &stop, &cur);
-
- g_assert (format == GST_FORMAT_BYTES);
-
- if (start != -1)
- start += mux->priv->start_tag_size;
- if (stop != -1)
- stop += mux->priv->start_tag_size;
- if (cur != -1)
- cur += mux->priv->start_tag_size;
-
- GST_DEBUG_OBJECT (mux, "adjusting newsegment event offsets to start=%"
- G_GINT64_FORMAT ", stop=%" G_GINT64_FORMAT ", cur=%" G_GINT64_FORMAT
- " (delta = +%" G_GSIZE_FORMAT ")", start, stop, cur,
- mux->priv->start_tag_size);
-
- return gst_event_new_new_segment (TRUE, 1.0, format, start, stop, cur);
-}
-
-static GstFlowReturn
-gst_tag_mux_chain (GstPad * pad, GstBuffer * buffer)
-{
- GstTagMux *mux = GST_TAG_MUX (GST_OBJECT_PARENT (pad));
- GstFlowReturn ret;
- int length;
-
- if (mux->priv->render_start_tag) {
-
- GST_INFO_OBJECT (mux, "Adding tags to stream");
- ret = gst_tag_mux_render_start_tag (mux);
- if (ret != GST_FLOW_OK) {
- GST_DEBUG_OBJECT (mux, "flow: %s", gst_flow_get_name (ret));
- gst_buffer_unref (buffer);
- return ret;
- }
-
- /* Now send the cached newsegment event that we got from upstream */
- if (mux->priv->newsegment_ev) {
- gint64 start;
- GstEvent *newseg;
-
- GST_DEBUG_OBJECT (mux, "sending cached newsegment event");
- newseg = gst_tag_mux_adjust_event_offsets (mux, mux->priv->newsegment_ev);
- gst_event_unref (mux->priv->newsegment_ev);
- mux->priv->newsegment_ev = NULL;
-
- gst_event_parse_new_segment (newseg, NULL, NULL, NULL, &start, NULL,
- NULL);
-
- gst_pad_push_event (mux->priv->srcpad, newseg);
- mux->priv->current_offset = start;
- mux->priv->max_offset =
- MAX (mux->priv->max_offset, mux->priv->current_offset);
- } else {
- /* upstream sent no newsegment event or only one in a non-BYTE format */
- }
-
- mux->priv->render_start_tag = FALSE;
- }
-
- buffer = gst_buffer_make_metadata_writable (buffer);
-
- if (GST_BUFFER_OFFSET (buffer) != GST_BUFFER_OFFSET_NONE) {
- GST_LOG_OBJECT (mux, "Adjusting buffer offset from %" G_GINT64_FORMAT
- " to %" G_GINT64_FORMAT, GST_BUFFER_OFFSET (buffer),
- GST_BUFFER_OFFSET (buffer) + mux->priv->start_tag_size);
- GST_BUFFER_OFFSET (buffer) += mux->priv->start_tag_size;
- }
-
- length = GST_BUFFER_SIZE (buffer);
-
- gst_buffer_set_caps (buffer, GST_PAD_CAPS (mux->priv->srcpad));
- ret = gst_pad_push (mux->priv->srcpad, buffer);
-
- mux->priv->current_offset += length;
- mux->priv->max_offset =
- MAX (mux->priv->max_offset, mux->priv->current_offset);
-
- return ret;
-}
-
-static gboolean
-gst_tag_mux_sink_event (GstPad * pad, GstEvent * event)
-{
- GstTagMux *mux;
- gboolean result;
-
- mux = GST_TAG_MUX (gst_pad_get_parent (pad));
- result = FALSE;
-
- switch (GST_EVENT_TYPE (event)) {
- case GST_EVENT_TAG:{
- GstTagList *tags;
-
- gst_event_parse_tag (event, &tags);
-
- GST_INFO_OBJECT (mux, "Got tag event: %" GST_PTR_FORMAT, tags);
-
- if (mux->priv->event_tags != NULL) {
- gst_tag_list_insert (mux->priv->event_tags, tags,
- GST_TAG_MERGE_REPLACE);
- } else {
- mux->priv->event_tags = gst_tag_list_copy (tags);
- }
-
- GST_INFO_OBJECT (mux, "Event tags are now: %" GST_PTR_FORMAT,
- mux->priv->event_tags);
-
- /* just drop the event, we'll push a new tag event in render_start_tag */
- gst_event_unref (event);
- result = TRUE;
- break;
- }
- case GST_EVENT_NEWSEGMENT:{
- GstFormat fmt;
- gint64 start;
-
- gst_event_parse_new_segment (event, NULL, NULL, &fmt, &start, NULL, NULL);
-
- if (fmt != GST_FORMAT_BYTES) {
- GST_WARNING_OBJECT (mux, "dropping newsegment event in %s format",
- gst_format_get_name (fmt));
- gst_event_unref (event);
- break;
- }
-
- if (mux->priv->render_start_tag) {
- /* we have not rendered the tag yet, which means that we don't know
- * how large it is going to be yet, so we can't adjust the offsets
- * here at this point and need to cache the newsegment event for now
- * (also, there could be tag events coming after this newsegment event
- * and before the first buffer). */
- if (mux->priv->newsegment_ev) {
- GST_WARNING_OBJECT (mux, "discarding old cached newsegment event");
- gst_event_unref (mux->priv->newsegment_ev);
- }
-
- GST_LOG_OBJECT (mux, "caching newsegment event for later");
- mux->priv->newsegment_ev = event;
- } else {
- GST_DEBUG_OBJECT (mux, "got newsegment event, adjusting offsets");
- gst_pad_push_event (mux->priv->srcpad,
- gst_tag_mux_adjust_event_offsets (mux, event));
- gst_event_unref (event);
-
- mux->priv->current_offset = start;
- mux->priv->max_offset =
- MAX (mux->priv->max_offset, mux->priv->current_offset);
- }
- event = NULL;
- result = TRUE;
- break;
- }
- case GST_EVENT_EOS:{
- if (mux->priv->render_end_tag) {
- GstFlowReturn ret;
-
- GST_INFO_OBJECT (mux, "Adding tags to stream");
- ret = gst_tag_mux_render_end_tag (mux);
- if (ret != GST_FLOW_OK) {
- GST_DEBUG_OBJECT (mux, "flow: %s", gst_flow_get_name (ret));
- return ret;
- }
-
- mux->priv->render_end_tag = FALSE;
- }
-
- /* Now forward EOS */
- result = gst_pad_event_default (pad, event);
- break;
- }
- default:
- result = gst_pad_event_default (pad, event);
- break;
- }
-
- gst_object_unref (mux);
-
- return result;
-}
-
-
-static GstStateChangeReturn
-gst_tag_mux_change_state (GstElement * element, GstStateChange transition)
-{
- GstTagMux *mux;
- GstStateChangeReturn result;
-
- mux = GST_TAG_MUX (element);
-
- result = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
- if (result != GST_STATE_CHANGE_SUCCESS) {
- return result;
- }
-
- switch (transition) {
- case GST_STATE_CHANGE_PAUSED_TO_READY:{
- if (mux->priv->newsegment_ev) {
- gst_event_unref (mux->priv->newsegment_ev);
- mux->priv->newsegment_ev = NULL;
- }
- if (mux->priv->event_tags) {
- gst_tag_list_free (mux->priv->event_tags);
- mux->priv->event_tags = NULL;
- }
- mux->priv->start_tag_size = 0;
- mux->priv->end_tag_size = 0;
- mux->priv->render_start_tag = TRUE;
- mux->priv->render_end_tag = TRUE;
- mux->priv->current_offset = 0;
- mux->priv->max_offset = 0;
- break;
- }
- default:
- break;
- }
-
- return result;
-}
projects / platform / upstream / gst-plugins-bad.git / commitdiff