From a694bd08f9eaef2d5520e271d9fd14dac63f535e Mon Sep 17 00:00:00 2001 From: Wim Taymans Date: Mon, 10 May 2004 13:34:57 +0000 Subject: [PATCH] ext/ogg/: Added an ogg muxer. Original commit message from CVS: * ext/ogg/gstogg.c: (plugin_init): * ext/ogg/gstoggdemux.c: (gst_ogg_demux_plugin_init), (gst_ogg_print): * ext/ogg/gstoggmux.c: (gst_ogg_mux_get_type), (gst_ogg_mux_base_init), (gst_ogg_mux_class_init), (gst_ogg_mux_get_sink_event_masks), (gst_ogg_mux_init), (gst_ogg_mux_sinkconnect), (gst_ogg_mux_pad_link), (gst_ogg_mux_pad_unlink), (gst_ogg_mux_request_new_pad), (gst_ogg_mux_handle_src_event), (gst_ogg_mux_next_buffer), (gst_ogg_mux_push_page), (gst_ogg_mux_compare_pads), (gst_ogg_mux_queue_pads), (gst_ogg_mux_loop), (gst_ogg_mux_get_property), (gst_ogg_mux_set_property), (gst_ogg_mux_change_state), (gst_ogg_mux_plugin_init): Added an ogg muxer. Small typo fixes in the demuxer. --- ChangeLog | 18 ++ ext/ogg/gstogg.c | 44 ++++ ext/ogg/gstoggdemux.c | 21 +- ext/ogg/gstoggmux.c | 678 ++++++++++++++++++++++++++++++++++++++++++++++++++ 4 files changed, 749 insertions(+), 12 deletions(-) create mode 100644 ext/ogg/gstogg.c create mode 100644 ext/ogg/gstoggmux.c diff --git a/ChangeLog b/ChangeLog index 0b5069a..86e80b0 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,5 +1,23 @@ 2004-05-10 Wim Taymans + * ext/ogg/gstogg.c: (plugin_init): + * ext/ogg/gstoggdemux.c: (gst_ogg_demux_plugin_init), + (gst_ogg_print): + * ext/ogg/gstoggmux.c: (gst_ogg_mux_get_type), + (gst_ogg_mux_base_init), (gst_ogg_mux_class_init), + (gst_ogg_mux_get_sink_event_masks), (gst_ogg_mux_init), + (gst_ogg_mux_sinkconnect), (gst_ogg_mux_pad_link), + (gst_ogg_mux_pad_unlink), (gst_ogg_mux_request_new_pad), + (gst_ogg_mux_handle_src_event), (gst_ogg_mux_next_buffer), + (gst_ogg_mux_push_page), (gst_ogg_mux_compare_pads), + (gst_ogg_mux_queue_pads), (gst_ogg_mux_loop), + (gst_ogg_mux_get_property), (gst_ogg_mux_set_property), + (gst_ogg_mux_change_state), (gst_ogg_mux_plugin_init): + Added an ogg muxer. + Small typo fixes in the demuxer. + +2004-05-10 Wim Taymans + * ext/theora/theoraenc.c: (gst_theora_enc_class_init), (theora_enc_sink_link), (theora_push_packet), (theora_enc_chain), (theora_enc_change_state), (theora_enc_set_property), diff --git a/ext/ogg/gstogg.c b/ext/ogg/gstogg.c new file mode 100644 index 0000000..cfea88b --- /dev/null +++ b/ext/ogg/gstogg.c @@ -0,0 +1,44 @@ +/* GStreamer + * Copyright (C) <1999> Erik Walthinsen + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Library General Public + * License as published by the Free Software Foundation; either + * version 2 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Library General Public License for more details. + * + * You should have received a copy of the GNU Library General Public + * License along with this library; if not, write to the + * Free Software Foundation, Inc., 59 Temple Place - Suite 330, + * Boston, MA 02111-1307, USA. + */ + +#ifdef HAVE_CONFIG_H +#include "config.h" +#endif + +#include + +extern gboolean gst_ogg_demux_plugin_init (GstPlugin * plugin); +extern gboolean gst_ogg_mux_plugin_init (GstPlugin * plugin); + +GST_DEBUG_CATEGORY (vorbisdec_debug); + +static gboolean +plugin_init (GstPlugin * plugin) +{ + gst_ogg_demux_plugin_init (plugin); + gst_ogg_mux_plugin_init (plugin); + + return TRUE; +} + +GST_PLUGIN_DEFINE (GST_VERSION_MAJOR, + GST_VERSION_MINOR, + "ogg", + "ogg stream manipulation (info about ogg: http://xiph.org)", + plugin_init, VERSION, GST_LICENSE, GST_PACKAGE, GST_ORIGIN) diff --git a/ext/ogg/gstoggdemux.c b/ext/ogg/gstoggdemux.c index 12a487b..d836f46 100644 --- a/ext/ogg/gstoggdemux.c +++ b/ext/ogg/gstoggdemux.c @@ -25,7 +25,7 @@ #include #include /* memcpy - if someone knows a way to get rid of it, please speak up - * note: the ogg docs even say you ned this... */ + * note: the ogg docs even say you need this... */ #include GST_DEBUG_CATEGORY_STATIC (gst_ogg_demux_debug); @@ -376,7 +376,8 @@ gst_ogg_demux_src_event (GstPad * pad, GstEvent * event) GST_OGG_SET_STATE (ogg, GST_OGG_STATE_SEEK); FOR_PAD_IN_CURRENT_CHAIN (ogg, pad, - pad->flags |= GST_OGG_PAD_NEEDS_DISCONT;); + pad->flags |= GST_OGG_PAD_NEEDS_DISCONT; + ); GST_DEBUG_OBJECT (ogg, "initiating seeking to offset %" G_GUINT64_FORMAT, offset); ogg->seek_pad = cur; @@ -423,7 +424,8 @@ gst_ogg_demux_handle_event (GstPad * pad, GstEvent * event) gst_event_unref (event); GST_FLAG_UNSET (ogg, GST_OGG_FLAG_WAIT_FOR_DISCONT); FOR_PAD_IN_CURRENT_CHAIN (ogg, pad, - pad->flags |= GST_OGG_PAD_NEEDS_DISCONT;); + pad->flags |= GST_OGG_PAD_NEEDS_DISCONT; + ); break; case GST_EVENT_EOS: if (ogg->state == GST_OGG_STATE_SETUP) { @@ -959,8 +961,8 @@ gst_ogg_type_find (ogg_packet * packet) return NULL; } -static gboolean -plugin_init (GstPlugin * plugin) +gboolean +gst_ogg_demux_plugin_init (GstPlugin * plugin) { GST_DEBUG_CATEGORY_INIT (gst_ogg_demux_debug, "oggdemux", 0, "ogg demuxer"); @@ -968,14 +970,9 @@ plugin_init (GstPlugin * plugin) GST_TYPE_OGG_DEMUX); } -GST_PLUGIN_DEFINE (GST_VERSION_MAJOR, - GST_VERSION_MINOR, - "ogg", - "ogg stream manipulation (info about ogg: http://xiph.org)", - plugin_init, VERSION, GST_LICENSE, GST_PACKAGE, GST_ORIGIN) - /* prints all info about the element */ - static void gst_ogg_print (GstOggDemux * ogg) +static void +gst_ogg_print (GstOggDemux * ogg) { guint i; GSList *walk; diff --git a/ext/ogg/gstoggmux.c b/ext/ogg/gstoggmux.c new file mode 100644 index 0000000..967c9fb --- /dev/null +++ b/ext/ogg/gstoggmux.c @@ -0,0 +1,678 @@ +/* OGG muxer plugin for GStreamer + * Copyright (C) 2004 Wim Taymans + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Library General Public + * License as published by the Free Software Foundation; either + * version 2 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Library General Public License for more details. + * + * You should have received a copy of the GNU Library General Public + * License along with this library; if not, write to the + * Free Software Foundation, Inc., 59 Temple Place - Suite 330, + * Boston, MA 02111-1307, USA. + */ + +#ifdef HAVE_CONFIG_H +#include "config.h" +#endif + +#include +#include +/* memcpy - if someone knows a way to get rid of it, please speak up + * note: the ogg docs even say you need this... */ +#include +#include + +GST_DEBUG_CATEGORY_STATIC (gst_ogg_mux_debug); +#define GST_CAT_DEFAULT gst_ogg_mux_debug + +#define GST_TYPE_OGG_MUX (gst_ogg_mux_get_type()) +#define GST_OGG_MUX(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_OGG_MUX, GstOggMux)) +#define GST_OGG_MUX_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_OGG_MUX, GstOggMux)) +#define GST_IS_OGG_MUX(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_OGG_MUX)) +#define GST_IS_OGG_MUX_CLASS(obj) (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_OGG_MUX)) + +typedef struct _GstOggMux GstOggMux; +typedef struct _GstOggMuxClass GstOggMuxClass; + +/* all information needed for one ogg stream */ +typedef struct +{ + GstPad *pad; /* reference for this pad is held by element we belong to */ + + GstBuffer *buffer; /* the queued buffer for this pad */ + + gint serial; + ogg_stream_state stream; + gint64 packetno; /* number of next packet */ + gint64 pageno; /* number of next page */ + gboolean eos; + + guint state; /* state of the pad */ +} +GstOggPad; + +typedef enum +{ + GST_OGG_PAD_STATE_CONTROL = 0, + GST_OGG_PAD_STATE_DATA = 1 +} +GstOggPadState; + +struct _GstOggMux +{ + GstElement element; + + /* pad */ + GstPad *srcpad; + + /* sinkpads, a GSList of GstOggPads */ + GSList *sinkpads; + + /* the pad we are currently pulling from to fill a page */ + GstOggPad *pulling; + + /* next timestamp for the page */ + GstClockTime next_ts; + + /* offset in stream */ + guint64 offset; +}; + +typedef enum +{ + GST_OGG_FLAG_BOS = GST_ELEMENT_FLAG_LAST, + GST_OGG_FLAG_EOS +} +GstOggFlag; + +struct _GstOggMuxClass +{ + GstElementClass parent_class; +}; + +/* elementfactory information */ +static GstElementDetails gst_ogg_mux_details = GST_ELEMENT_DETAILS ("ogg muxer", + "Codec/Muxer", + "mux ogg streams (info about ogg: http://xiph.org)", + "Wim Taymans "); + +/* OggMux signals and args */ +enum +{ + /* FILL ME */ + LAST_SIGNAL +}; + +enum +{ + ARG_0, +}; + +static GstStaticPadTemplate src_factory = GST_STATIC_PAD_TEMPLATE ("src", + GST_PAD_SRC, + GST_PAD_ALWAYS, + GST_STATIC_CAPS ("application/ogg") + ); + +static GstStaticPadTemplate sink_factory = GST_STATIC_PAD_TEMPLATE ("sink_%d", + GST_PAD_SINK, + GST_PAD_REQUEST, + GST_STATIC_CAPS_ANY /* we can take anything, really */ + ); + +static void gst_ogg_mux_base_init (gpointer g_class); +static void gst_ogg_mux_class_init (GstOggMuxClass * klass); +static void gst_ogg_mux_init (GstOggMux * ogg_mux); + +static void gst_ogg_mux_loop (GstElement * element); +static gboolean gst_ogg_mux_handle_src_event (GstPad * pad, GstEvent * event); +static GstPad *gst_ogg_mux_request_new_pad (GstElement * element, + GstPadTemplate * templ, const gchar * name); +static void gst_ogg_mux_set_property (GObject * object, + guint prop_id, const GValue * value, GParamSpec * pspec); +static void gst_ogg_mux_get_property (GObject * object, + guint prop_id, GValue * value, GParamSpec * pspec); +static GstElementStateReturn gst_ogg_mux_change_state (GstElement * element); + +static GstElementClass *parent_class = NULL; + +/*static guint gst_ogg_mux_signals[LAST_SIGNAL] = { 0 }; */ + +GType +gst_ogg_mux_get_type (void) +{ + static GType ogg_mux_type = 0; + + if (!ogg_mux_type) { + static const GTypeInfo ogg_mux_info = { + sizeof (GstOggMuxClass), + gst_ogg_mux_base_init, + NULL, + (GClassInitFunc) gst_ogg_mux_class_init, + NULL, + NULL, + sizeof (GstOggMux), + 0, + (GInstanceInitFunc) gst_ogg_mux_init, + }; + + ogg_mux_type = + g_type_register_static (GST_TYPE_ELEMENT, "GstOggMux", &ogg_mux_info, + 0); + } + return ogg_mux_type; +} + +static void +gst_ogg_mux_base_init (gpointer g_class) +{ + GstElementClass *element_class = GST_ELEMENT_CLASS (g_class); + + gst_element_class_add_pad_template (element_class, + gst_static_pad_template_get (&src_factory)); + gst_element_class_add_pad_template (element_class, + gst_static_pad_template_get (&sink_factory)); + + gst_element_class_set_details (element_class, &gst_ogg_mux_details); +} + +static void +gst_ogg_mux_class_init (GstOggMuxClass * klass) +{ + GObjectClass *gobject_class; + GstElementClass *gstelement_class; + + gobject_class = (GObjectClass *) klass; + gstelement_class = (GstElementClass *) klass; + + parent_class = g_type_class_ref (GST_TYPE_ELEMENT); + + gstelement_class->request_new_pad = gst_ogg_mux_request_new_pad; + + gstelement_class->change_state = gst_ogg_mux_change_state; + + gstelement_class->get_property = gst_ogg_mux_get_property; + gstelement_class->set_property = gst_ogg_mux_set_property; +} + +static const GstEventMask * +gst_ogg_mux_get_sink_event_masks (GstPad * pad) +{ + static const GstEventMask gst_ogg_mux_sink_event_masks[] = { + {GST_EVENT_EOS, 0}, + {0,} + }; + + return gst_ogg_mux_sink_event_masks; +} + +static void +gst_ogg_mux_init (GstOggMux * ogg_mux) +{ + GstElementClass *klass = GST_ELEMENT_GET_CLASS (ogg_mux); + + ogg_mux->srcpad = + gst_pad_new_from_template (gst_element_class_get_pad_template (klass, + "src"), "src"); + gst_pad_set_event_function (ogg_mux->srcpad, gst_ogg_mux_handle_src_event); + gst_element_add_pad (GST_ELEMENT (ogg_mux), ogg_mux->srcpad); + + GST_FLAG_SET (GST_ELEMENT (ogg_mux), GST_ELEMENT_EVENT_AWARE); + GST_FLAG_SET (GST_ELEMENT (ogg_mux), GST_OGG_FLAG_BOS); + + /* seed random number generator for creation of serial numbers */ + srand (time (NULL)); + + ogg_mux->sinkpads = NULL; + ogg_mux->pulling = NULL; + + gst_element_set_loop_function (GST_ELEMENT (ogg_mux), gst_ogg_mux_loop); +} + +static GstPadLinkReturn +gst_ogg_mux_sinkconnect (GstPad * pad, const GstCaps * vscaps) +{ + GstOggMux *ogg_mux; + GstStructure *structure; + const gchar *mimetype; + + ogg_mux = GST_OGG_MUX (gst_pad_get_parent (pad)); + + GST_DEBUG ("ogg_mux: sinkconnect triggered on %s", gst_pad_get_name (pad)); + + structure = gst_caps_get_structure (vscaps, 0); + mimetype = gst_structure_get_name (structure); + + return GST_PAD_LINK_OK; +} + +static void +gst_ogg_mux_pad_link (GstPad * pad, GstPad * peer, gpointer data) +{ + //GstOggMux *ogg_mux = GST_OGG_MUX (data); + const gchar *padname = gst_pad_get_name (pad); + + GST_DEBUG ("pad '%s' connected", padname); +} + +static void +gst_ogg_mux_pad_unlink (GstPad * pad, GstPad * peer, gpointer data) +{ + //GstOggMux *ogg_mux = GST_OGG_MUX (data); + const gchar *padname = gst_pad_get_name (pad); + + GST_DEBUG ("pad '%s' unlinked", padname); +} + +static GstPad * +gst_ogg_mux_request_new_pad (GstElement * element, + GstPadTemplate * templ, const gchar * req_name) +{ + GstOggMux *ogg_mux; + GstPad *newpad; + GstElementClass *klass = GST_ELEMENT_GET_CLASS (element); + + g_return_val_if_fail (templ != NULL, NULL); + + if (templ->direction != GST_PAD_SINK) { + g_warning ("ogg_mux: request pad that is not a SINK pad\n"); + return NULL; + } + + g_return_val_if_fail (GST_IS_OGG_MUX (element), NULL); + + ogg_mux = GST_OGG_MUX (element); + + if (templ == gst_element_class_get_pad_template (klass, "sink_%d")) { + gint serial; + gchar *name; + + if (req_name == NULL || strlen (req_name) < 6) { + /* no name given when requesting the pad, use random serial number */ + serial = rand (); + } else { + /* parse serial number from requested padname */ + serial = atoi (&req_name[5]); + } + /* create new pad with the name */ + name = g_strdup_printf ("sink_%d", serial); + newpad = gst_pad_new_from_template (templ, name); + g_free (name); + + /* construct our own wrapper data structure for the pad to + * keep track of its status */ + { + GstOggPad *oggpad = g_new0 (GstOggPad, 1); + + oggpad->pad = newpad; + oggpad->serial = serial; + ogg_stream_init (&oggpad->stream, serial); + oggpad->packetno = 0; + oggpad->pageno = 0; + oggpad->eos = FALSE; + /* we assume there will be some control data first for this pad */ + oggpad->state = GST_OGG_PAD_STATE_CONTROL; + + /* save a pointer to our data in the pad */ + gst_pad_set_element_private (newpad, oggpad); + /* store our data for the pad */ + ogg_mux->sinkpads = g_slist_prepend (ogg_mux->sinkpads, oggpad); + } + } else { + g_warning ("ogg_mux: this is not our template!\n"); + return NULL; + } + + g_signal_connect (newpad, "linked", + G_CALLBACK (gst_ogg_mux_pad_link), (gpointer) ogg_mux); + g_signal_connect (newpad, "unlinked", + G_CALLBACK (gst_ogg_mux_pad_unlink), (gpointer) ogg_mux); + + /* setup some pad functions */ + gst_pad_set_link_function (newpad, gst_ogg_mux_sinkconnect); + gst_pad_set_event_mask_function (newpad, gst_ogg_mux_get_sink_event_masks); + /* dd the pad to the element */ + gst_element_add_pad (element, newpad); + + return newpad; +} + +/* handle events */ +static gboolean +gst_ogg_mux_handle_src_event (GstPad * pad, GstEvent * event) +{ + GstOggMux *ogg_mux; + GstEventType type; + + ogg_mux = GST_OGG_MUX (gst_pad_get_parent (pad)); + + type = event ? GST_EVENT_TYPE (event) : GST_EVENT_UNKNOWN; + + switch (type) { + case GST_EVENT_SEEK: + /* disable seeking for now */ + return FALSE; + default: + break; + } + + return gst_pad_event_default (pad, event); +} + +static GstBuffer * +gst_ogg_mux_next_buffer (GstOggPad * pad) +{ + GstData *data = NULL; + + while (data == NULL) { + GST_LOG ("muxer: pulling %s:%s\n", GST_DEBUG_PAD_NAME (pad->pad)); + data = gst_pad_pull (pad->pad); + /* if it's an event, handle it */ + if (GST_IS_EVENT (data)) { + GstEventType type; + GstOggMux *ogg_mux; + GstEvent *event = GST_EVENT (data); + + ogg_mux = GST_OGG_MUX (gst_pad_get_parent (pad->pad)); + type = event ? GST_EVENT_TYPE (event) : GST_EVENT_UNKNOWN; + + switch (type) { + case GST_EVENT_EOS: + return NULL; + default: + gst_pad_event_default (pad->pad, event); + break; + } + data = NULL; + } + } + return GST_BUFFER (data); +} + +static void +gst_ogg_mux_push_page (GstOggMux * mux, ogg_page * page) +{ + GstBuffer *buffer; + + /* allocate space for header and body */ + buffer = gst_pad_alloc_buffer (mux->srcpad, GST_BUFFER_OFFSET_NONE, + page->header_len + page->body_len); + memcpy (GST_BUFFER_DATA (buffer), page->header, page->header_len); + memcpy (GST_BUFFER_DATA (buffer) + page->header_len, + page->body, page->body_len); + + /* next_ts was the timestamp of the first buffer put in this page */ + GST_BUFFER_TIMESTAMP (buffer) = mux->next_ts; + GST_BUFFER_OFFSET (buffer) = mux->offset; + mux->offset += GST_BUFFER_SIZE (buffer); + GST_BUFFER_OFFSET_END (buffer) = mux->offset; + + if (GST_PAD_IS_USABLE (mux->srcpad)) + gst_pad_push (mux->srcpad, GST_DATA (buffer)); + else + gst_buffer_unref (buffer); +} + +/* + * Given two pads, compare the buffers queued on it and return 0 if they have + * an equal priority, 1 if the new pad is better, -1 if the old pad is better + */ +static gint +gst_ogg_mux_compare_pads (GstOggMux * ogg_mux, GstOggPad * old, GstOggPad * new) +{ + guint64 oldtime, newtime; + + /* if the old pad doesn't contain anything or is even NULL, return + * the new pad as best candidate and vice versa */ + if (old == NULL || old->buffer == NULL) + return 1; + if (new == NULL || new->buffer == NULL) + return -1; + + /* no timestamp on old buffer, it must go first */ + oldtime = GST_BUFFER_TIMESTAMP (old->buffer); + if (oldtime == GST_CLOCK_TIME_NONE) + return -1; + + /* no timestamp on new buffer, it must go first */ + newtime = GST_BUFFER_TIMESTAMP (new->buffer); + if (newtime == GST_CLOCK_TIME_NONE) + return 1; + + /* old buffer has higher timestamp, new one should go first */ + if (newtime < oldtime) + return 1; + /* new buffer has higher timestamp, old one should go first */ + else if (newtime > oldtime) + return -1; + else { + /* buffers with equal timestamps, prefer the pad that has the + * least number of pages muxed */ + if (new->pageno < old->pageno) + return 1; + else if (new->pageno > old->pageno) + return -1; + } + + /* same priority if all of the above failed */ + return 0; +} + +/* make sure a buffer is queued on all pads, returns a pointer to an oggpad + * that holds the best buffer or NULL when no pad was usable */ +static GstOggPad * +gst_ogg_mux_queue_pads (GstOggMux * ogg_mux) +{ + GstOggPad *bestpad = NULL; + GSList *walk; + + /* try to make sure we have a buffer from each usable pad first */ + walk = ogg_mux->sinkpads; + while (walk) { + GstOggPad *pad = (GstOggPad *) walk->data; + + walk = walk->next; + + /* try to get a new buffer for this pad if needed and possible */ + if (pad->buffer == NULL && GST_PAD_IS_USABLE (pad->pad)) { + pad->buffer = gst_ogg_mux_next_buffer (pad); + /* no next buffer, try another pad */ + if (pad->buffer == NULL) + continue; + } + + /* skip unusable pads */ + if (!GST_PAD_IS_USABLE (pad->pad)) + continue; + + /* we should have a buffer now, see if it is the best pad to + * pull on */ + if (pad->buffer != NULL) { + if (gst_ogg_mux_compare_pads (ogg_mux, bestpad, pad) > 0) { + bestpad = pad; + } + } + } + return bestpad; +} + +/* basic idea: + * + * 1) find a pad to pull on, this is done by pulling on all pads and + * looking at the buffers to decide which one should be muxed first. + * 2) store the selected pad and keep on pulling until we fill a + * complete ogg page. This is needed because the ogg spec says that + * you should fill a complete page with data from the same logical + * stream. When the page is filled, go back to 1). + * 3) before filling a packet, read ahead one more buffer to see if this + * packet is the last of the stream. + */ +static void +gst_ogg_mux_loop (GstElement * element) +{ + GstOggMux *ogg_mux; + + ogg_mux = GST_OGG_MUX (element); + + /* if we don't know which pad to pull on, find one */ + if (ogg_mux->pulling == NULL) { + ogg_mux->pulling = gst_ogg_mux_queue_pads (ogg_mux); + /* remember timestamp of first buffer for this new pad */ + if (ogg_mux->pulling != NULL) { + ogg_mux->next_ts = GST_BUFFER_TIMESTAMP (ogg_mux->pulling->buffer); + } else { + /* no pad to pull on, send EOS */ + if (GST_PAD_IS_USABLE (ogg_mux->srcpad)) + gst_pad_push (ogg_mux->srcpad, + GST_DATA (gst_event_new (GST_EVENT_EOS))); + gst_element_set_eos (element); + return; + } + } + + /* we are pulling from a pad, continue to do so until a page + * has been filled and pushed */ + if (ogg_mux->pulling != NULL) { + ogg_packet packet; + ogg_page page; + GstBuffer *buf, *tmpbuf; + GstOggPad *pad = ogg_mux->pulling; + gint ret; + GstOggPadState newstate; + + /* now see if we have a buffer */ + buf = pad->buffer; + if (buf == NULL) { + /* no buffer, get one */ + buf = gst_ogg_mux_next_buffer (pad); + /* data exhausted on this pad (EOS) */ + if (buf == NULL) { + /* stop pulling from the pad */ + ogg_mux->pulling = NULL; + return; + } + } + + /* ogg expects headers and data to be in a different page, we + * have no way of knowing headers from data here so we use the + * buffer control flag as a hint */ + newstate = (pad->packetno < 3 ? + GST_OGG_PAD_STATE_CONTROL : GST_OGG_PAD_STATE_DATA); + + if (newstate != pad->state) { + /* state switch, flush page */ + while (ogg_stream_flush (&pad->stream, &page)) { + gst_ogg_mux_push_page (ogg_mux, &page); + pad->pageno++; + } + /* switching state */ + pad->state = newstate; + } + + /* create a packet from the buffer */ + packet.packet = GST_BUFFER_DATA (buf); + packet.bytes = GST_BUFFER_SIZE (buf); + packet.granulepos = GST_BUFFER_OFFSET_END (buf); + /* mark BOS and packet number */ + packet.b_o_s = (pad->packetno == 0); + packet.packetno = pad->packetno++; + + /* read ahead one more buffer to find EOS */ + tmpbuf = gst_ogg_mux_next_buffer (pad); + /* data exhausted on this pad */ + if (tmpbuf == NULL) { + /* stop pulling from the pad */ + ogg_mux->pulling = NULL; + } + /* mark EOS */ + packet.e_o_s = (tmpbuf == NULL ? 1 : 0); + + /* swap the packet in */ + ogg_stream_packetin (&pad->stream, &packet); + + /* don't need the old buffer anymore */ + gst_buffer_unref (pad->buffer); + /* store new readahead buffer */ + pad->buffer = tmpbuf; + + /* create a page */ + ret = ogg_stream_pageout (&pad->stream, &page); + if (ret > 0) { + /* we have a complete page now, we can push the page + * and make sure to pull on a new pad the next time around */ + gst_ogg_mux_push_page (ogg_mux, &page); + /* increment the page number counter */ + pad->pageno++; + /* we're done pulling on this pad, make sure to choose a new + * pad for pulling in the next iteration */ + ogg_mux->pulling = NULL; + } + } +} + +static void +gst_ogg_mux_get_property (GObject * object, + guint prop_id, GValue * value, GParamSpec * pspec) +{ + switch (prop_id) { + default: + G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); + break; + } +} + +static void +gst_ogg_mux_set_property (GObject * object, + guint prop_id, const GValue * value, GParamSpec * pspec) +{ + switch (prop_id) { + default: + G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); + break; + } +} + +static GstElementStateReturn +gst_ogg_mux_change_state (GstElement * element) +{ + GstOggMux *ogg_mux; + gint transition = GST_STATE_TRANSITION (element); + + g_return_val_if_fail (GST_IS_OGG_MUX (element), GST_STATE_FAILURE); + + ogg_mux = GST_OGG_MUX (element); + + switch (transition) { + case GST_STATE_NULL_TO_READY: + case GST_STATE_READY_TO_PAUSED: + ogg_mux->next_ts = 0; + ogg_mux->offset = 0; + ogg_mux->pulling = NULL; + break; + case GST_STATE_PAUSED_TO_PLAYING: + case GST_STATE_PLAYING_TO_PAUSED: + case GST_STATE_PAUSED_TO_READY: + case GST_STATE_READY_TO_NULL: + break; + } + + if (GST_ELEMENT_CLASS (parent_class)->change_state) + return GST_ELEMENT_CLASS (parent_class)->change_state (element); + + return GST_STATE_SUCCESS; +} + +gboolean +gst_ogg_mux_plugin_init (GstPlugin * plugin) +{ + GST_DEBUG_CATEGORY_INIT (gst_ogg_mux_debug, "oggmux", 0, "ogg muxer"); + + return gst_element_register (plugin, "oggmux", GST_RANK_PRIMARY, + GST_TYPE_OGG_MUX); +} -- 2.7.4