initial version of our gstreamer elements
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maroy
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345
livesupport/modules/gstreamerElements/src/seek-pack.c
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345
livesupport/modules/gstreamerElements/src/seek-pack.c
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/*------------------------------------------------------------------------------
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Copyright (c) 2004 Media Development Loan Fund
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This file is part of the LiveSupport project.
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http://livesupport.campware.org/
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To report bugs, send an e-mail to bugs@campware.org
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LiveSupport is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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LiveSupport is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with LiveSupport; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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Author : $Author: maroy $
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Version : $Revision: 1.1 $
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Location : $Source: /home/paul/cvs2svn-livesupport/newcvsrepo/livesupport/modules/gstreamerElements/src/seek-pack.c,v $
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------------------------------------------------------------------------------*/
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/* ============================================================ include files */
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#ifdef HAVE_CONFIG_H
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#include "configure.h"
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#endif
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#ifdef HAVE_STRING_H
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#include <string.h>
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#else
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#error need string.h
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#endif
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#include <gst/gst.h>
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#include "seek.h"
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#include "seek-pack.h"
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/* =================================================== local data structures */
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/* ================================================ local constants & macros */
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#define NSEC_PER_SEC 1000000000LL
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#define SEC_PER_MIN 60
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#define SEC_PER_HOUR 3600
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#define NSEC_PER_SEC_FLOAT 1000000000.0
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#define SEC_PER_MIN_FLOAT 60.0
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#define SEC_PER_HOUR_FLOAT 3600.0
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/* =============================================== local function prototypes */
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/**
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* Perform the seeks on the SeekPack, set by the initialization function.
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*
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* @param seekPack the SeekPack to perform the seek on.
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* @see #livesupport_seek_pack_init
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*/
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static void
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livesupport_seek_pack_seek(LivesupportSeekPack * seekPack);
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/* ============================================================= module code */
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/*------------------------------------------------------------------------------
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* Create a new SeekPack.
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*----------------------------------------------------------------------------*/
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LivesupportSeekPack *
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livesupport_seek_pack_new(const gchar * uniqueName)
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{
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unsigned int len = strlen(uniqueName) + 64;
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gchar * str = g_malloc(len);
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LivesupportSeekPack * seekPack = g_malloc(sizeof(LivesupportSeekPack));
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g_snprintf(str, len, "%s_seekPackSilence", uniqueName);
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seekPack->silence = gst_element_factory_make("silence", str);
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g_snprintf(str, len, "%s_seekPackAudioConvert", uniqueName);
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seekPack->audioconvert = gst_element_factory_make("audioconvert", str);
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seekPack->source = NULL;
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/* TODO: typefind, and create Ogg Vorbis parser/decoder */
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seekPack->parser = NULL;
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g_snprintf(str, len, "%s_seekPackDecoder", uniqueName);
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seekPack->decoder = gst_element_factory_make("mad", str);
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g_snprintf(str, len, "%s_seekPackSwitch", uniqueName);
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seekPack->switchElement = gst_element_factory_make("switch", str);
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g_snprintf(str, len, "%s_seekPackSwitcher", uniqueName);
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seekPack->switcher = gst_element_factory_make("switcher", str);
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g_snprintf(str, len, "%s_seekPackBin", uniqueName);
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seekPack->bin = gst_bin_new(str);
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g_free(str);
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seekPack->silenceDuration = 0LL;
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seekPack->startTime = 0LL;
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seekPack->endTime = 0LL;
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seekPack->duration = 0LL;
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seekPack->positionAfterSeek = 0LL;
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seekPack->realEndTime = 0LL;
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seekPack->sendingSilence = TRUE;
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gst_element_link_many(seekPack->silence,
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seekPack->audioconvert,
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seekPack->switchElement,
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seekPack->switcher,
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NULL);
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/* put all inside the bin, and link up a ghost pad to switch's src pad */
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gst_bin_add_many(GST_BIN(seekPack->bin),
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seekPack->silence,
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seekPack->audioconvert,
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seekPack->switchElement,
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seekPack->switcher,
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NULL);
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gst_element_add_ghost_pad(seekPack->bin,
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gst_element_get_pad(seekPack->switcher, "src"),
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"src");
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return seekPack;
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}
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/*------------------------------------------------------------------------------
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* Initialize a SeekPack.
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*----------------------------------------------------------------------------*/
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void
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livesupport_seek_pack_init(LivesupportSeekPack * seekPack,
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GstElement * source,
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gint64 silenceDuration,
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gint64 startTime,
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gint64 endTime)
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{
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GValue gvalue = { 0 };
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gchar str[256];
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seekPack->source = source;
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seekPack->silenceDuration = silenceDuration;
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seekPack->startTime = startTime;
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seekPack->endTime = endTime;
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seekPack->duration = endTime - startTime;
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seekPack->positionAfterSeek = 0LL;
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seekPack->realEndTime = 0LL;
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g_value_init(&gvalue, G_TYPE_STRING);
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g_snprintf(str, 256, "0[%lfs];1[%lfs]",
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seekPack->silenceDuration / NSEC_PER_SEC_FLOAT,
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seekPack->duration / NSEC_PER_SEC_FLOAT);
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g_value_set_string(&gvalue, str);
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gst_element_set_property(seekPack->switcher, "source-config", &gvalue);
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gst_element_link(seekPack->source, seekPack->decoder);
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livesupport_seek_pack_seek(seekPack);
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gst_element_link(seekPack->decoder, seekPack->switchElement);
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gst_bin_add_many(GST_BIN(seekPack->bin),
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seekPack->source,
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seekPack->decoder,
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NULL);
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}
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/*------------------------------------------------------------------------------
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* Destroy a SeekPack.
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*----------------------------------------------------------------------------*/
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void
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livesupport_seek_pack_destroy(LivesupportSeekPack * seekPack)
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{
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gst_element_set_state(seekPack->bin, GST_STATE_NULL);
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g_object_unref(seekPack->bin);
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g_free(seekPack);
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}
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/*------------------------------------------------------------------------------
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* Link a SeekPack to another element.
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*----------------------------------------------------------------------------*/
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gboolean
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livesupport_seek_pack_link(LivesupportSeekPack * seekPack,
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GstElement * element)
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{
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return gst_element_link(seekPack->bin, element);
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}
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/*------------------------------------------------------------------------------
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* Add a SeekPack to a bin.
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*----------------------------------------------------------------------------*/
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void
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livesupport_seek_pack_add_to_bin(LivesupportSeekPack * seekPack,
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GstBin * bin)
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{
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/* put an extra ref on our elements, as the bin will decrease the
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* ref when they are removed from there */
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g_object_ref(seekPack->bin);
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gst_bin_add(bin, seekPack->bin);
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}
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/*------------------------------------------------------------------------------
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* Remove a SeekPack from a bin.
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*----------------------------------------------------------------------------*/
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void
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livesupport_seek_pack_remove_from_bin(LivesupportSeekPack * seekPack,
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GstBin * bin)
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{
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gst_bin_remove(bin, seekPack->bin);
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}
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/*------------------------------------------------------------------------------
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* Set the state of a SeekPack.
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*----------------------------------------------------------------------------*/
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void
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livesupport_seek_pack_set_state(LivesupportSeekPack * seekPack,
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GstElementState state)
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{
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/* FIXME: resetting the source from PLAYING state would make it lose
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* it's seek position */
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gst_element_set_state(seekPack->audioconvert, state);
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gst_element_set_state(seekPack->decoder, state);
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gst_element_set_state(seekPack->switchElement, state);
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}
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/*------------------------------------------------------------------------------
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* Do the seeking on a SeekPack.
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*----------------------------------------------------------------------------*/
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static void
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livesupport_seek_pack_seek(LivesupportSeekPack * seekPack)
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{
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GstElement * pipeline;
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GstElement * fakesink;
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gboolean ret;
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gint64 value;
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GstSeekType seekType;
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seekType = (GstSeekType) (GST_FORMAT_TIME |
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GST_SEEK_METHOD_SET |
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GST_SEEK_FLAG_FLUSH);
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pipeline = gst_pipeline_new("seek_pipeline");
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fakesink = gst_element_factory_make("fakesink", "seek_fakesink");
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gst_element_link(seekPack->decoder, fakesink);
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/* ref the objects we want to keep after pipeline, as it will unref them */
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g_object_ref(seekPack->source);
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g_object_ref(seekPack->decoder);
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gst_bin_add_many(GST_BIN(pipeline),
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seekPack->source,
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seekPack->decoder,
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fakesink,
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NULL);
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GST_DEBUG("setting seek pipeline to PLAYING state");
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gst_element_set_state(seekPack->decoder, GST_STATE_READY);
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gst_element_set_state(fakesink, GST_STATE_READY);
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gst_element_set_state(pipeline, GST_STATE_PLAYING);
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GST_DEBUG("starting to iterate...");
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for (value = 0; value == 0 && gst_bin_iterate(GST_BIN(pipeline)); ) {
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GstFormat format = GST_FORMAT_DEFAULT;
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gst_element_query(fakesink, GST_QUERY_POSITION, &format, &value);
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GST_DEBUG("position value: %" G_GINT64_FORMAT, value);
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}
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GST_DEBUG("seeking on element");
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ret = livesupport_seek(seekPack->decoder, seekType, seekPack->startTime);
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GST_DEBUG("seek result: %d", ret);
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gst_bin_remove_many(GST_BIN(pipeline),
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seekPack->source,
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seekPack->decoder,
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NULL);
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gst_element_unlink(seekPack->decoder, fakesink);
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gst_object_unref(GST_OBJECT(pipeline));
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}
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/*------------------------------------------------------------------------------
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* Iterate on a SeekPack.
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* This will change from silence to the proper audio if needed.
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*----------------------------------------------------------------------------*/
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gboolean
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livesupport_seek_pack_iterate(LivesupportSeekPack * seekPack)
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{
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gint64 value;
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GstFormat format = GST_FORMAT_TIME;
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gst_bin_iterate(GST_BIN(seekPack->bin));
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if (seekPack->sendingSilence) {
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gst_element_query(seekPack->silence,
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GST_QUERY_POSITION,
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&format,
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&value);
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if (value >= seekPack->silenceDuration) {
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GValue gvalue = { 0 };
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g_value_init(&gvalue, G_TYPE_INT);
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g_value_set_int(&gvalue, 1);
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gst_element_set_property(seekPack->switchElement,
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"active-source",
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&gvalue);
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seekPack->sendingSilence = FALSE;
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}
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} else {
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gst_element_query(seekPack->decoder,
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GST_QUERY_POSITION,
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&format,
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&value);
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/* FIXME: this is a workaround, as the seek actually won't get us
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* where we asked it to. */
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if (!seekPack->realEndTime) {
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seekPack->positionAfterSeek = value;
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seekPack->realEndTime = value + seekPack->duration;
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}
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if (value >= seekPack->realEndTime) {
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GST_INFO("reached EOS at %" G_GINT64_FORMAT "\n", value);
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gst_element_set_eos(seekPack->source);
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gst_element_set_eos(seekPack->decoder);
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gst_element_set_eos(seekPack->bin);
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return FALSE;
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}
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}
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return TRUE;
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}
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