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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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1558 lines
46 KiB
C
1558 lines
46 KiB
C
/* GStreamer
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*
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* Copyright (c) 2008,2009 Sebastian Dröge <sebastian.droege@collabora.co.uk>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library 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 GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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/**
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* SECTION:element-flvmux
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*
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* flvmux muxes different streams into an FLV file.
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*
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* <refsect2>
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* <title>Example launch line</title>
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* |[
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* gst-launch -v filesrc location=/path/to/audio ! decodebin2 ! queue ! flvmux name=m ! filesink location=file.flv filesrc location=/path/to/video ! decodebin2 ! queue ! m.
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* ]| This pipeline muxes an audio and video file into a single FLV file.
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* </refsect2>
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <math.h>
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#include <string.h>
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#include "gstflvmux.h"
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GST_DEBUG_CATEGORY_STATIC (flvmux_debug);
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#define GST_CAT_DEFAULT flvmux_debug
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enum
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{
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PROP_0,
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PROP_STREAMABLE
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};
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#define DEFAULT_STREAMABLE FALSE
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#define MAX_INDEX_ENTRIES 128
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static GstStaticPadTemplate src_templ = GST_STATIC_PAD_TEMPLATE ("src",
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GST_PAD_SRC,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS ("video/x-flv")
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);
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static GstStaticPadTemplate videosink_templ = GST_STATIC_PAD_TEMPLATE ("video",
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GST_PAD_SINK,
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GST_PAD_REQUEST,
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GST_STATIC_CAPS ("video/x-flash-video; "
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"video/x-flash-screen; "
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"video/x-vp6-flash; " "video/x-vp6-alpha; "
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"video/x-h264, stream-format=avc;")
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);
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static GstStaticPadTemplate audiosink_templ = GST_STATIC_PAD_TEMPLATE ("audio",
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GST_PAD_SINK,
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GST_PAD_REQUEST,
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GST_STATIC_CAPS
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("audio/x-adpcm, layout = (string) swf, channels = (int) { 1, 2 }, rate = (int) { 5512, 11025, 22050, 44100 }; "
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"audio/mpeg, mpegversion = (int) 1, layer = (int) 3, channels = (int) { 1, 2 }, rate = (int) { 5512, 8000, 11025, 22050, 44100 }, parsed = (boolean) TRUE; "
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"audio/mpeg, mpegversion = (int) 4, framed = (boolean) TRUE; "
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"audio/x-nellymoser, channels = (int) { 1, 2 }, rate = (int) { 5512, 8000, 11025, 16000, 22050, 44100 }; "
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"audio/x-raw-int, endianness = (int) LITTLE_ENDIAN, channels = (int) { 1, 2 }, width = (int) 8, depth = (int) 8, rate = (int) { 5512, 11025, 22050, 44100 }, signed = (boolean) FALSE; "
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"audio/x-raw-int, endianness = (int) LITTLE_ENDIAN, channels = (int) { 1, 2 }, width = (int) 16, depth = (int) 16, rate = (int) { 5512, 11025, 22050, 44100 }, signed = (boolean) TRUE; "
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"audio/x-alaw, channels = (int) { 1, 2 }, rate = (int) { 5512, 11025, 22050, 44100 }; "
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"audio/x-mulaw, channels = (int) { 1, 2 }, rate = (int) { 5512, 11025, 22050, 44100 }; "
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"audio/x-speex, channels = (int) { 1, 2 }, rate = (int) { 5512, 11025, 22050, 44100 };")
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);
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#define _do_init(type) \
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G_STMT_START{ \
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static const GInterfaceInfo tag_setter_info = { \
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NULL, \
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NULL, \
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NULL \
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}; \
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g_type_add_interface_static (type, GST_TYPE_TAG_SETTER, \
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&tag_setter_info); \
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}G_STMT_END
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GST_BOILERPLATE_FULL (GstFlvMux, gst_flv_mux, GstElement, GST_TYPE_ELEMENT,
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_do_init);
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static void gst_flv_mux_finalize (GObject * object);
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static GstFlowReturn
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gst_flv_mux_collected (GstCollectPads * pads, gpointer user_data);
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static gboolean gst_flv_mux_handle_src_event (GstPad * pad, GstEvent * event);
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static GstPad *gst_flv_mux_request_new_pad (GstElement * element,
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GstPadTemplate * templ, const gchar * name);
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static void gst_flv_mux_release_pad (GstElement * element, GstPad * pad);
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static void gst_flv_mux_get_property (GObject * object,
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guint prop_id, GValue * value, GParamSpec * pspec);
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static void gst_flv_mux_set_property (GObject * object,
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guint prop_id, const GValue * value, GParamSpec * pspec);
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static GstStateChangeReturn
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gst_flv_mux_change_state (GstElement * element, GstStateChange transition);
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static void gst_flv_mux_reset (GstElement * element);
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typedef struct
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{
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gdouble position;
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gdouble time;
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} GstFlvMuxIndexEntry;
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static void
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gst_flv_mux_index_entry_free (GstFlvMuxIndexEntry * entry)
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{
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g_slice_free (GstFlvMuxIndexEntry, entry);
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}
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static void
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gst_flv_mux_base_init (gpointer g_class)
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{
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GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
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gst_element_class_add_pad_template (element_class,
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gst_static_pad_template_get (&videosink_templ));
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gst_element_class_add_pad_template (element_class,
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gst_static_pad_template_get (&audiosink_templ));
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gst_element_class_add_pad_template (element_class,
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gst_static_pad_template_get (&src_templ));
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gst_element_class_set_details_simple (element_class, "FLV muxer",
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"Codec/Muxer",
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"Muxes video/audio streams into a FLV stream",
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"Sebastian Dröge <sebastian.droege@collabora.co.uk>");
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GST_DEBUG_CATEGORY_INIT (flvmux_debug, "flvmux", 0, "FLV muxer");
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}
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static void
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gst_flv_mux_class_init (GstFlvMuxClass * klass)
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{
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GObjectClass *gobject_class;
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GstElementClass *gstelement_class;
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GST_DEBUG_CATEGORY_INIT (flvmux_debug, "flvmux", 0, "FLV muxer");
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gobject_class = (GObjectClass *) klass;
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gstelement_class = (GstElementClass *) klass;
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gobject_class->get_property = gst_flv_mux_get_property;
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gobject_class->set_property = gst_flv_mux_set_property;
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gobject_class->finalize = gst_flv_mux_finalize;
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/* FIXME: ideally the right mode of operation should be detected
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* automatically using queries when parameter not specified. */
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/**
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* GstFlvMux:streamable
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*
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* If True, the output will be streaming friendly. (ie without indexes and
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* duration)
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*
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* Since: 0.10.24
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**/
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g_object_class_install_property (gobject_class, PROP_STREAMABLE,
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g_param_spec_boolean ("streamable", "streamable",
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"If set to true, the output should be as if it is to be streamed "
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"and hence no indexes written or duration written.",
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DEFAULT_STREAMABLE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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gstelement_class->change_state = GST_DEBUG_FUNCPTR (gst_flv_mux_change_state);
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gstelement_class->request_new_pad =
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GST_DEBUG_FUNCPTR (gst_flv_mux_request_new_pad);
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gstelement_class->release_pad = GST_DEBUG_FUNCPTR (gst_flv_mux_release_pad);
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}
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static void
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gst_flv_mux_init (GstFlvMux * mux, GstFlvMuxClass * g_class)
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{
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mux->srcpad = gst_pad_new_from_static_template (&src_templ, "src");
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gst_pad_set_event_function (mux->srcpad, gst_flv_mux_handle_src_event);
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gst_element_add_pad (GST_ELEMENT (mux), mux->srcpad);
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/* property */
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mux->streamable = DEFAULT_STREAMABLE;
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mux->new_tags = FALSE;
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mux->collect = gst_collect_pads_new ();
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gst_collect_pads_set_function (mux->collect,
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(GstCollectPadsFunction) GST_DEBUG_FUNCPTR (gst_flv_mux_collected), mux);
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gst_flv_mux_reset (GST_ELEMENT (mux));
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}
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static void
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gst_flv_mux_finalize (GObject * object)
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{
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GstFlvMux *mux = GST_FLV_MUX (object);
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gst_object_unref (mux->collect);
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G_OBJECT_CLASS (parent_class)->finalize (object);
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}
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static void
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gst_flv_mux_reset (GstElement * element)
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{
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GstFlvMux *mux = GST_FLV_MUX (element);
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GSList *sl;
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while ((sl = mux->collect->data) != NULL) {
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GstFlvPad *cpad = (GstFlvPad *) sl->data;
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gst_element_release_request_pad (element, cpad->collect.pad);
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}
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g_list_foreach (mux->index, (GFunc) gst_flv_mux_index_entry_free, NULL);
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g_list_free (mux->index);
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mux->index = NULL;
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mux->byte_count = 0;
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mux->have_audio = mux->have_video = FALSE;
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mux->duration = GST_CLOCK_TIME_NONE;
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mux->new_tags = FALSE;
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mux->state = GST_FLV_MUX_STATE_HEADER;
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/* tags */
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gst_tag_setter_reset_tags (GST_TAG_SETTER (mux));
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}
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static gboolean
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gst_flv_mux_handle_src_event (GstPad * pad, GstEvent * event)
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{
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GstEventType type;
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type = event ? GST_EVENT_TYPE (event) : GST_EVENT_UNKNOWN;
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switch (type) {
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case GST_EVENT_SEEK:
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/* disable seeking for now */
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return FALSE;
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default:
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break;
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}
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return gst_pad_event_default (pad, event);
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}
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static gboolean
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gst_flv_mux_handle_sink_event (GstPad * pad, GstEvent * event)
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{
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GstFlvMux *mux = GST_FLV_MUX (gst_pad_get_parent (pad));
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gboolean ret = TRUE;
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switch (GST_EVENT_TYPE (event)) {
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case GST_EVENT_TAG:{
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GstTagList *list;
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GstTagSetter *setter = GST_TAG_SETTER (mux);
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const GstTagMergeMode mode = gst_tag_setter_get_tag_merge_mode (setter);
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gst_event_parse_tag (event, &list);
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gst_tag_setter_merge_tags (setter, list, mode);
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mux->new_tags = TRUE;
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break;
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}
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case GST_EVENT_NEWSEGMENT:
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/* We don't support NEWSEGMENT events */
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ret = FALSE;
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gst_event_unref (event);
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break;
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default:
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break;
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}
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/* now GstCollectPads can take care of the rest, e.g. EOS */
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if (ret)
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ret = mux->collect_event (pad, event);
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gst_object_unref (mux);
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return ret;
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}
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static gboolean
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gst_flv_mux_video_pad_setcaps (GstPad * pad, GstCaps * caps)
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{
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GstFlvMux *mux = GST_FLV_MUX (gst_pad_get_parent (pad));
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GstFlvPad *cpad = (GstFlvPad *) gst_pad_get_element_private (pad);
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gboolean ret = TRUE;
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GstStructure *s;
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s = gst_caps_get_structure (caps, 0);
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if (strcmp (gst_structure_get_name (s), "video/x-flash-video") == 0) {
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cpad->video_codec = 2;
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} else if (strcmp (gst_structure_get_name (s), "video/x-flash-screen") == 0) {
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cpad->video_codec = 3;
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} else if (strcmp (gst_structure_get_name (s), "video/x-vp6-flash") == 0) {
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cpad->video_codec = 4;
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} else if (strcmp (gst_structure_get_name (s), "video/x-vp6-alpha") == 0) {
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cpad->video_codec = 5;
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} else if (strcmp (gst_structure_get_name (s), "video/x-h264") == 0) {
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cpad->video_codec = 7;
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} else {
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ret = FALSE;
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}
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if (ret && gst_structure_has_field (s, "codec_data")) {
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const GValue *val = gst_structure_get_value (s, "codec_data");
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if (val)
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cpad->video_codec_data = gst_buffer_ref (gst_value_get_buffer (val));
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}
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gst_object_unref (mux);
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return ret;
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}
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static gboolean
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gst_flv_mux_audio_pad_setcaps (GstPad * pad, GstCaps * caps)
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{
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GstFlvMux *mux = GST_FLV_MUX (gst_pad_get_parent (pad));
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GstFlvPad *cpad = (GstFlvPad *) gst_pad_get_element_private (pad);
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gboolean ret = TRUE;
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GstStructure *s;
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s = gst_caps_get_structure (caps, 0);
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if (strcmp (gst_structure_get_name (s), "audio/x-adpcm") == 0) {
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const gchar *layout = gst_structure_get_string (s, "layout");
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if (layout && strcmp (layout, "swf") == 0) {
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cpad->audio_codec = 1;
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} else {
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ret = FALSE;
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}
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} else if (strcmp (gst_structure_get_name (s), "audio/mpeg") == 0) {
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gint mpegversion;
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if (gst_structure_get_int (s, "mpegversion", &mpegversion)) {
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if (mpegversion == 1) {
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gint layer;
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if (gst_structure_get_int (s, "layer", &layer) && layer == 3) {
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gint rate;
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if (gst_structure_get_int (s, "rate", &rate) && rate == 8000)
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cpad->audio_codec = 14;
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else
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cpad->audio_codec = 2;
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} else {
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ret = FALSE;
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}
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} else if (mpegversion == 4) {
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cpad->audio_codec = 10;
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} else {
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ret = FALSE;
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}
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} else {
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ret = FALSE;
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}
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} else if (strcmp (gst_structure_get_name (s), "audio/x-nellymoser") == 0) {
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gint rate, channels;
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if (gst_structure_get_int (s, "rate", &rate)
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&& gst_structure_get_int (s, "channels", &channels)) {
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if (channels == 1 && rate == 16000)
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cpad->audio_codec = 4;
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else if (channels == 1 && rate == 8000)
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cpad->audio_codec = 5;
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else
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cpad->audio_codec = 6;
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} else {
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cpad->audio_codec = 6;
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}
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} else if (strcmp (gst_structure_get_name (s), "audio/x-raw-int") == 0) {
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gint endianness;
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if (gst_structure_get_int (s, "endianness", &endianness)
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&& endianness == G_LITTLE_ENDIAN)
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cpad->audio_codec = 3;
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else
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ret = FALSE;
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} else if (strcmp (gst_structure_get_name (s), "audio/x-alaw") == 0) {
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cpad->audio_codec = 7;
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} else if (strcmp (gst_structure_get_name (s), "audio/x-mulaw") == 0) {
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cpad->audio_codec = 8;
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} else if (strcmp (gst_structure_get_name (s), "audio/x-speex") == 0) {
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cpad->audio_codec = 11;
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} else {
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ret = FALSE;
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}
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if (ret) {
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gint rate, channels, width;
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if (gst_structure_get_int (s, "rate", &rate)) {
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if (cpad->audio_codec == 10)
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cpad->rate = 3;
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else if (rate == 5512)
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cpad->rate = 0;
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else if (rate == 11025)
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cpad->rate = 1;
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else if (rate == 22050)
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cpad->rate = 2;
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else if (rate == 44100)
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cpad->rate = 3;
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else if (rate == 8000 && (cpad->audio_codec == 5
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|| cpad->audio_codec == 14))
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cpad->rate = 0;
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else if (rate == 16000 && cpad->audio_codec == 4)
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cpad->rate = 0;
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else
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ret = FALSE;
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} else if (cpad->audio_codec == 10) {
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cpad->rate = 3;
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} else {
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ret = FALSE;
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}
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if (gst_structure_get_int (s, "channels", &channels)) {
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if (cpad->audio_codec == 4 || cpad->audio_codec == 5
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|| cpad->audio_codec == 6)
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cpad->channels = 0;
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else if (cpad->audio_codec == 10)
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cpad->channels = 1;
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else if (channels == 1)
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cpad->channels = 0;
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else if (channels == 2)
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cpad->channels = 1;
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else
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ret = FALSE;
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} else if (cpad->audio_codec == 4 || cpad->audio_codec == 5
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|| cpad->audio_codec == 6) {
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cpad->channels = 0;
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} else if (cpad->audio_codec == 10) {
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cpad->channels = 1;
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} else {
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ret = FALSE;
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}
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if (gst_structure_get_int (s, "width", &width)) {
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if (cpad->audio_codec != 3)
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cpad->width = 1;
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else if (width == 8)
|
|
cpad->width = 0;
|
|
else if (width == 16)
|
|
cpad->width = 1;
|
|
else
|
|
ret = FALSE;
|
|
} else if (cpad->audio_codec != 3) {
|
|
cpad->width = 1;
|
|
} else {
|
|
ret = FALSE;
|
|
}
|
|
}
|
|
|
|
if (ret && gst_structure_has_field (s, "codec_data")) {
|
|
const GValue *val = gst_structure_get_value (s, "codec_data");
|
|
|
|
if (val)
|
|
cpad->audio_codec_data = gst_buffer_ref (gst_value_get_buffer (val));
|
|
}
|
|
|
|
gst_object_unref (mux);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static GstPad *
|
|
gst_flv_mux_request_new_pad (GstElement * element,
|
|
GstPadTemplate * templ, const gchar * pad_name)
|
|
{
|
|
GstElementClass *klass = GST_ELEMENT_GET_CLASS (element);
|
|
GstFlvMux *mux = GST_FLV_MUX (element);
|
|
GstFlvPad *cpad;
|
|
GstPad *pad = NULL;
|
|
const gchar *name = NULL;
|
|
GstPadSetCapsFunction setcapsfunc = NULL;
|
|
gboolean video;
|
|
|
|
if (mux->state != GST_FLV_MUX_STATE_HEADER) {
|
|
GST_WARNING_OBJECT (mux, "Can't request pads after writing header");
|
|
return NULL;
|
|
}
|
|
|
|
if (templ == gst_element_class_get_pad_template (klass, "audio")) {
|
|
if (mux->have_audio) {
|
|
GST_WARNING_OBJECT (mux, "Already have an audio pad");
|
|
return NULL;
|
|
}
|
|
mux->have_audio = TRUE;
|
|
name = "audio";
|
|
video = FALSE;
|
|
setcapsfunc = GST_DEBUG_FUNCPTR (gst_flv_mux_audio_pad_setcaps);
|
|
} else if (templ == gst_element_class_get_pad_template (klass, "video")) {
|
|
if (mux->have_video) {
|
|
GST_WARNING_OBJECT (mux, "Already have a video pad");
|
|
return NULL;
|
|
}
|
|
mux->have_video = TRUE;
|
|
name = "video";
|
|
video = TRUE;
|
|
setcapsfunc = GST_DEBUG_FUNCPTR (gst_flv_mux_video_pad_setcaps);
|
|
} else {
|
|
GST_WARNING_OBJECT (mux, "Invalid template");
|
|
return NULL;
|
|
}
|
|
|
|
pad = gst_pad_new_from_template (templ, name);
|
|
cpad = (GstFlvPad *)
|
|
gst_collect_pads_add_pad (mux->collect, pad, sizeof (GstFlvPad));
|
|
|
|
cpad->video = video;
|
|
|
|
cpad->audio_codec = G_MAXUINT;
|
|
cpad->rate = G_MAXUINT;
|
|
cpad->width = G_MAXUINT;
|
|
cpad->channels = G_MAXUINT;
|
|
cpad->audio_codec_data = NULL;
|
|
|
|
cpad->video_codec = G_MAXUINT;
|
|
cpad->video_codec_data = NULL;
|
|
|
|
cpad->last_timestamp = 0;
|
|
|
|
/* FIXME: hacked way to override/extend the event function of
|
|
* GstCollectPads; because it sets its own event function giving the
|
|
* element no access to events.
|
|
*/
|
|
mux->collect_event = (GstPadEventFunction) GST_PAD_EVENTFUNC (pad);
|
|
gst_pad_set_event_function (pad,
|
|
GST_DEBUG_FUNCPTR (gst_flv_mux_handle_sink_event));
|
|
|
|
gst_pad_set_setcaps_function (pad, setcapsfunc);
|
|
gst_pad_set_active (pad, TRUE);
|
|
gst_element_add_pad (element, pad);
|
|
|
|
return pad;
|
|
}
|
|
|
|
static void
|
|
gst_flv_mux_release_pad (GstElement * element, GstPad * pad)
|
|
{
|
|
GstFlvMux *mux = GST_FLV_MUX (GST_PAD_PARENT (pad));
|
|
GstFlvPad *cpad = (GstFlvPad *) gst_pad_get_element_private (pad);
|
|
|
|
if (cpad && cpad->audio_codec_data)
|
|
gst_buffer_unref (cpad->audio_codec_data);
|
|
if (cpad && cpad->video_codec_data)
|
|
gst_buffer_unref (cpad->video_codec_data);
|
|
|
|
gst_collect_pads_remove_pad (mux->collect, pad);
|
|
gst_element_remove_pad (element, pad);
|
|
}
|
|
|
|
static GstFlowReturn
|
|
gst_flv_mux_push (GstFlvMux * mux, GstBuffer * buffer)
|
|
{
|
|
gst_buffer_set_caps (buffer, GST_PAD_CAPS (mux->srcpad));
|
|
/* pushing the buffer that rewrites the header will make it no longer be the
|
|
* total output size in bytes, but it doesn't matter at that point */
|
|
mux->byte_count += GST_BUFFER_SIZE (buffer);
|
|
|
|
return gst_pad_push (mux->srcpad, buffer);
|
|
}
|
|
|
|
static GstBuffer *
|
|
gst_flv_mux_create_header (GstFlvMux * mux)
|
|
{
|
|
GstBuffer *header;
|
|
guint8 *data;
|
|
|
|
header = gst_buffer_new_and_alloc (9 + 4);
|
|
data = GST_BUFFER_DATA (header);
|
|
|
|
data[0] = 'F';
|
|
data[1] = 'L';
|
|
data[2] = 'V';
|
|
data[3] = 0x01; /* Version */
|
|
|
|
data[4] = (mux->have_audio << 2) | mux->have_video; /* flags */
|
|
GST_WRITE_UINT32_BE (data + 5, 9); /* data offset */
|
|
GST_WRITE_UINT32_BE (data + 9, 0); /* previous tag size */
|
|
|
|
return header;
|
|
}
|
|
|
|
static GstBuffer *
|
|
gst_flv_mux_preallocate_index (GstFlvMux * mux)
|
|
{
|
|
GstBuffer *tmp;
|
|
guint8 *data;
|
|
gint preallocate_size;
|
|
|
|
/* preallocate index of size:
|
|
* - 'keyframes' ECMA array key: 2 + 9 = 11 bytes
|
|
* - nested ECMA array header, length and end marker: 8 bytes
|
|
* - 'times' and 'filepositions' keys: 22 bytes
|
|
* - two strict arrays headers and lengths: 10 bytes
|
|
* - each index entry: 18 bytes
|
|
*/
|
|
preallocate_size = 11 + 8 + 22 + 10 + MAX_INDEX_ENTRIES * 18;
|
|
GST_DEBUG_OBJECT (mux, "preallocating %d bytes for the index",
|
|
preallocate_size);
|
|
|
|
tmp = gst_buffer_new_and_alloc (preallocate_size);
|
|
data = GST_BUFFER_DATA (tmp);
|
|
|
|
/* prefill the space with a gstfiller: <spaces> script tag variable */
|
|
GST_WRITE_UINT16_BE (data, 9); /* 9 characters */
|
|
memcpy (data + 2, "gstfiller", 9);
|
|
GST_WRITE_UINT8 (data + 11, 2); /* a string value */
|
|
GST_WRITE_UINT16_BE (data + 12, preallocate_size - 14);
|
|
memset (data + 14, ' ', preallocate_size - 14); /* the rest is spaces */
|
|
return tmp;
|
|
}
|
|
|
|
static GstBuffer *
|
|
gst_flv_mux_create_number_script_value (const gchar * name, gdouble value)
|
|
{
|
|
GstBuffer *tmp = gst_buffer_new_and_alloc (2 + strlen (name) + 1 + 8);
|
|
guint8 *data = GST_BUFFER_DATA (tmp);
|
|
|
|
GST_WRITE_UINT16_BE (data, strlen (name)); /* name length */
|
|
memcpy (&data[2], name, strlen (name));
|
|
data[2 + strlen (name)] = 0; /* double */
|
|
GST_WRITE_DOUBLE_BE (data + 2 + strlen (name) + 1, value);
|
|
|
|
return tmp;
|
|
}
|
|
|
|
static GstBuffer *
|
|
gst_flv_mux_create_metadata (GstFlvMux * mux)
|
|
{
|
|
const GstTagList *tags;
|
|
GstBuffer *script_tag, *tmp;
|
|
guint8 *data;
|
|
gint i, n_tags, tags_written = 0;
|
|
|
|
tags = gst_tag_setter_get_tag_list (GST_TAG_SETTER (mux));
|
|
|
|
GST_DEBUG_OBJECT (mux, "tags = %" GST_PTR_FORMAT, tags);
|
|
|
|
script_tag = gst_buffer_new_and_alloc (11);
|
|
data = GST_BUFFER_DATA (script_tag);
|
|
|
|
data[0] = 18;
|
|
|
|
/* Data size, unknown for now */
|
|
data[1] = 0;
|
|
data[2] = 0;
|
|
data[3] = 0;
|
|
|
|
/* Timestamp */
|
|
data[4] = data[5] = data[6] = data[7] = 0;
|
|
|
|
/* Stream ID */
|
|
data[8] = data[9] = data[10] = 0;
|
|
|
|
tmp = gst_buffer_new_and_alloc (13);
|
|
data = GST_BUFFER_DATA (tmp);
|
|
data[0] = 2; /* string */
|
|
data[1] = 0;
|
|
data[2] = 10; /* length 10 */
|
|
memcpy (&data[3], "onMetaData", 10);
|
|
|
|
script_tag = gst_buffer_join (script_tag, tmp);
|
|
|
|
n_tags = (tags) ? gst_structure_n_fields ((GstStructure *) tags) : 0;
|
|
tmp = gst_buffer_new_and_alloc (5);
|
|
data = GST_BUFFER_DATA (tmp);
|
|
data[0] = 8; /* ECMA array */
|
|
GST_WRITE_UINT32_BE (data + 1, n_tags);
|
|
script_tag = gst_buffer_join (script_tag, tmp);
|
|
|
|
/* Some players expect the 'duration' to be always set. Fill it out later,
|
|
after querying the pads or after getting EOS */
|
|
if (!mux->streamable) {
|
|
tmp = gst_flv_mux_create_number_script_value ("duration", 86400);
|
|
script_tag = gst_buffer_join (script_tag, tmp);
|
|
tags_written++;
|
|
}
|
|
|
|
/* Sometimes the information about the total file size is useful for the
|
|
player. It will be filled later, after getting EOS */
|
|
if (!mux->streamable) {
|
|
tmp = gst_flv_mux_create_number_script_value ("filesize", 0);
|
|
script_tag = gst_buffer_join (script_tag, tmp);
|
|
tags_written++;
|
|
}
|
|
|
|
if (!mux->streamable) {
|
|
tmp = gst_flv_mux_preallocate_index (mux);
|
|
script_tag = gst_buffer_join (script_tag, tmp);
|
|
} else {
|
|
GST_DEBUG_OBJECT (mux, "not preallocating index, streamable mode");
|
|
}
|
|
|
|
for (i = 0; tags && i < n_tags; i++) {
|
|
const gchar *tag_name =
|
|
gst_structure_nth_field_name ((const GstStructure *) tags, i);
|
|
if (!strcmp (tag_name, GST_TAG_DURATION)) {
|
|
guint64 dur;
|
|
|
|
if (!gst_tag_list_get_uint64 (tags, GST_TAG_DURATION, &dur))
|
|
continue;
|
|
mux->duration = dur;
|
|
} else if (!strcmp (tag_name, GST_TAG_ARTIST) ||
|
|
!strcmp (tag_name, GST_TAG_TITLE)) {
|
|
gchar *s;
|
|
const gchar *t = NULL;
|
|
|
|
if (!strcmp (tag_name, GST_TAG_ARTIST))
|
|
t = "creator";
|
|
else if (!strcmp (tag_name, GST_TAG_TITLE))
|
|
t = "title";
|
|
|
|
if (!gst_tag_list_get_string (tags, tag_name, &s))
|
|
continue;
|
|
|
|
tmp = gst_buffer_new_and_alloc (2 + strlen (t) + 1 + 2 + strlen (s));
|
|
data = GST_BUFFER_DATA (tmp);
|
|
data[0] = 0; /* tag name length */
|
|
data[1] = strlen (t);
|
|
memcpy (&data[2], t, strlen (t));
|
|
data[2 + strlen (t)] = 2; /* string */
|
|
data[3 + strlen (t)] = (strlen (s) >> 8) & 0xff;
|
|
data[4 + strlen (t)] = (strlen (s)) & 0xff;
|
|
memcpy (&data[5 + strlen (t)], s, strlen (s));
|
|
script_tag = gst_buffer_join (script_tag, tmp);
|
|
|
|
g_free (s);
|
|
tags_written++;
|
|
}
|
|
}
|
|
|
|
if (mux->duration == GST_CLOCK_TIME_NONE) {
|
|
GSList *l;
|
|
|
|
GstFormat fmt = GST_FORMAT_TIME;
|
|
guint64 dur;
|
|
|
|
for (l = mux->collect->data; l; l = l->next) {
|
|
GstCollectData *cdata = l->data;
|
|
|
|
fmt = GST_FORMAT_TIME;
|
|
|
|
if (gst_pad_query_peer_duration (cdata->pad, &fmt, (gint64 *) & dur) &&
|
|
fmt == GST_FORMAT_TIME && dur != GST_CLOCK_TIME_NONE) {
|
|
if (mux->duration == GST_CLOCK_TIME_NONE)
|
|
mux->duration = dur;
|
|
else
|
|
mux->duration = MAX (dur, mux->duration);
|
|
}
|
|
}
|
|
}
|
|
|
|
if (mux->duration != GST_CLOCK_TIME_NONE) {
|
|
gdouble d;
|
|
d = gst_guint64_to_gdouble (mux->duration);
|
|
d /= (gdouble) GST_SECOND;
|
|
|
|
GST_DEBUG_OBJECT (mux, "determined the duration to be %f", d);
|
|
data = GST_BUFFER_DATA (script_tag);
|
|
GST_WRITE_DOUBLE_BE (data + 29 + 2 + 8 + 1, d);
|
|
}
|
|
|
|
if (mux->have_video) {
|
|
GstPad *video_pad = NULL;
|
|
GstFlvPad *cpad;
|
|
GSList *l = mux->collect->data;
|
|
|
|
for (; l; l = l->next) {
|
|
cpad = l->data;
|
|
if (cpad && cpad->video) {
|
|
video_pad = cpad->collect.pad;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (video_pad && GST_PAD_CAPS (video_pad)) {
|
|
GstStructure *s = gst_caps_get_structure (GST_PAD_CAPS (video_pad), 0);
|
|
gint size;
|
|
gint num, den;
|
|
|
|
GST_DEBUG_OBJECT (mux, "putting videocodecid %d in the metadata",
|
|
cpad->video_codec);
|
|
|
|
tmp = gst_flv_mux_create_number_script_value ("videocodecid",
|
|
cpad->video_codec);
|
|
script_tag = gst_buffer_join (script_tag, tmp);
|
|
tags_written++;
|
|
|
|
if (gst_structure_get_int (s, "width", &size)) {
|
|
GST_DEBUG_OBJECT (mux, "putting width %d in the metadata", size);
|
|
|
|
tmp = gst_flv_mux_create_number_script_value ("width", size);
|
|
script_tag = gst_buffer_join (script_tag, tmp);
|
|
tags_written++;
|
|
}
|
|
|
|
if (gst_structure_get_int (s, "height", &size)) {
|
|
GST_DEBUG_OBJECT (mux, "putting height %d in the metadata", size);
|
|
|
|
tmp = gst_flv_mux_create_number_script_value ("height", size);
|
|
script_tag = gst_buffer_join (script_tag, tmp);
|
|
tags_written++;
|
|
}
|
|
|
|
if (gst_structure_get_fraction (s, "pixel-aspect-ratio", &num, &den)) {
|
|
gdouble d;
|
|
|
|
d = num;
|
|
GST_DEBUG_OBJECT (mux, "putting AspectRatioX %f in the metadata", d);
|
|
|
|
tmp = gst_flv_mux_create_number_script_value ("AspectRatioX", d);
|
|
script_tag = gst_buffer_join (script_tag, tmp);
|
|
tags_written++;
|
|
|
|
d = den;
|
|
GST_DEBUG_OBJECT (mux, "putting AspectRatioY %f in the metadata", d);
|
|
|
|
tmp = gst_flv_mux_create_number_script_value ("AspectRatioY", d);
|
|
script_tag = gst_buffer_join (script_tag, tmp);
|
|
tags_written++;
|
|
}
|
|
|
|
if (gst_structure_get_fraction (s, "framerate", &num, &den)) {
|
|
gdouble d;
|
|
|
|
gst_util_fraction_to_double (num, den, &d);
|
|
GST_DEBUG_OBJECT (mux, "putting framerate %f in the metadata", d);
|
|
|
|
tmp = gst_flv_mux_create_number_script_value ("framerate", d);
|
|
script_tag = gst_buffer_join (script_tag, tmp);
|
|
tags_written++;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (mux->have_audio) {
|
|
GstPad *audio_pad = NULL;
|
|
GstFlvPad *cpad;
|
|
GSList *l = mux->collect->data;
|
|
|
|
for (; l; l = l->next) {
|
|
cpad = l->data;
|
|
if (cpad && !cpad->video) {
|
|
audio_pad = cpad->collect.pad;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (audio_pad) {
|
|
GST_DEBUG_OBJECT (mux, "putting audiocodecid %d in the metadata",
|
|
cpad->audio_codec);
|
|
|
|
tmp = gst_flv_mux_create_number_script_value ("audiocodecid",
|
|
cpad->audio_codec);
|
|
script_tag = gst_buffer_join (script_tag, tmp);
|
|
tags_written++;
|
|
}
|
|
}
|
|
|
|
{
|
|
const gchar *s = "GStreamer FLV muxer";
|
|
|
|
tmp = gst_buffer_new_and_alloc (2 + 15 + 1 + 2 + strlen (s));
|
|
data = GST_BUFFER_DATA (tmp);
|
|
data[0] = 0; /* 15 bytes name */
|
|
data[1] = 15;
|
|
memcpy (&data[2], "metadatacreator", 15);
|
|
data[17] = 2; /* string */
|
|
data[18] = (strlen (s) >> 8) & 0xff;
|
|
data[19] = (strlen (s)) & 0xff;
|
|
memcpy (&data[20], s, strlen (s));
|
|
script_tag = gst_buffer_join (script_tag, tmp);
|
|
|
|
tags_written++;
|
|
}
|
|
|
|
{
|
|
GTimeVal tv = { 0, };
|
|
time_t secs;
|
|
struct tm *tm;
|
|
gchar *s;
|
|
static const gchar *weekdays[] = {
|
|
"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"
|
|
};
|
|
static const gchar *months[] = {
|
|
"Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul",
|
|
"Aug", "Sep", "Oct", "Nov", "Dec"
|
|
};
|
|
|
|
g_get_current_time (&tv);
|
|
secs = tv.tv_sec;
|
|
tm = gmtime (&secs);
|
|
|
|
s = g_strdup_printf ("%s %s %d %d:%d:%d %d", weekdays[tm->tm_wday],
|
|
months[tm->tm_mon], tm->tm_mday, tm->tm_hour, tm->tm_min, tm->tm_sec,
|
|
tm->tm_year + 1900);
|
|
|
|
tmp = gst_buffer_new_and_alloc (2 + 12 + 1 + 2 + strlen (s));
|
|
data = GST_BUFFER_DATA (tmp);
|
|
data[0] = 0; /* 12 bytes name */
|
|
data[1] = 12;
|
|
memcpy (&data[2], "creationdate", 12);
|
|
data[14] = 2; /* string */
|
|
data[15] = (strlen (s) >> 8) & 0xff;
|
|
data[16] = (strlen (s)) & 0xff;
|
|
memcpy (&data[17], s, strlen (s));
|
|
script_tag = gst_buffer_join (script_tag, tmp);
|
|
|
|
g_free (s);
|
|
tags_written++;
|
|
}
|
|
|
|
tmp = gst_buffer_new_and_alloc (2 + 0 + 1);
|
|
data = GST_BUFFER_DATA (tmp);
|
|
data[0] = 0; /* 0 byte size */
|
|
data[1] = 0;
|
|
data[2] = 9; /* end marker */
|
|
script_tag = gst_buffer_join (script_tag, tmp);
|
|
tags_written++;
|
|
|
|
tmp = gst_buffer_new_and_alloc (4);
|
|
data = GST_BUFFER_DATA (tmp);
|
|
GST_WRITE_UINT32_BE (data, GST_BUFFER_SIZE (script_tag));
|
|
script_tag = gst_buffer_join (script_tag, tmp);
|
|
|
|
data = GST_BUFFER_DATA (script_tag);
|
|
data[1] = ((GST_BUFFER_SIZE (script_tag) - 11 - 4) >> 16) & 0xff;
|
|
data[2] = ((GST_BUFFER_SIZE (script_tag) - 11 - 4) >> 8) & 0xff;
|
|
data[3] = ((GST_BUFFER_SIZE (script_tag) - 11 - 4) >> 0) & 0xff;
|
|
|
|
GST_WRITE_UINT32_BE (data + 11 + 13 + 1, tags_written);
|
|
|
|
return script_tag;
|
|
}
|
|
|
|
static GstBuffer *
|
|
gst_flv_mux_buffer_to_tag_internal (GstFlvMux * mux, GstBuffer * buffer,
|
|
GstFlvPad * cpad, gboolean is_codec_data)
|
|
{
|
|
GstBuffer *tag;
|
|
guint8 *data;
|
|
guint size;
|
|
guint32 timestamp =
|
|
(GST_BUFFER_TIMESTAMP_IS_VALID (buffer)) ? GST_BUFFER_TIMESTAMP (buffer) /
|
|
GST_MSECOND : cpad->last_timestamp / GST_MSECOND;
|
|
|
|
size = 11;
|
|
if (cpad->video) {
|
|
size += 1;
|
|
if (cpad->video_codec == 7)
|
|
size += 4 + GST_BUFFER_SIZE (buffer);
|
|
else
|
|
size += GST_BUFFER_SIZE (buffer);
|
|
} else {
|
|
size += 1;
|
|
if (cpad->audio_codec == 10)
|
|
size += 1 + GST_BUFFER_SIZE (buffer);
|
|
else
|
|
size += GST_BUFFER_SIZE (buffer);
|
|
}
|
|
size += 4;
|
|
|
|
tag = gst_buffer_new_and_alloc (size);
|
|
GST_BUFFER_TIMESTAMP (tag) = timestamp * GST_MSECOND;
|
|
data = GST_BUFFER_DATA (tag);
|
|
memset (data, 0, size);
|
|
|
|
data[0] = (cpad->video) ? 9 : 8;
|
|
|
|
data[1] = ((size - 11 - 4) >> 16) & 0xff;
|
|
data[2] = ((size - 11 - 4) >> 8) & 0xff;
|
|
data[3] = ((size - 11 - 4) >> 0) & 0xff;
|
|
|
|
/* wrap the timestamp every G_MAXINT32 miliseconds */
|
|
timestamp &= 0x7fffffff;
|
|
data[4] = (timestamp >> 16) & 0xff;
|
|
data[5] = (timestamp >> 8) & 0xff;
|
|
data[6] = (timestamp >> 0) & 0xff;
|
|
data[7] = (timestamp >> 24) & 0xff;
|
|
|
|
data[8] = data[9] = data[10] = 0;
|
|
|
|
if (cpad->video) {
|
|
if (GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DELTA_UNIT))
|
|
data[11] |= 2 << 4;
|
|
else
|
|
data[11] |= 1 << 4;
|
|
|
|
data[11] |= cpad->video_codec & 0x0f;
|
|
|
|
if (cpad->video_codec == 7) {
|
|
data[12] = is_codec_data ? 0 : 1;
|
|
|
|
/* FIXME: what to do about composition time */
|
|
data[13] = data[14] = data[15] = 0;
|
|
|
|
memcpy (data + 11 + 1 + 4, GST_BUFFER_DATA (buffer),
|
|
GST_BUFFER_SIZE (buffer));
|
|
} else {
|
|
memcpy (data + 11 + 1, GST_BUFFER_DATA (buffer),
|
|
GST_BUFFER_SIZE (buffer));
|
|
}
|
|
} else {
|
|
data[11] |= (cpad->audio_codec << 4) & 0xf0;
|
|
data[11] |= (cpad->rate << 2) & 0x0c;
|
|
data[11] |= (cpad->width << 1) & 0x02;
|
|
data[11] |= (cpad->channels << 0) & 0x01;
|
|
|
|
if (cpad->audio_codec == 10) {
|
|
data[12] = is_codec_data ? 0 : 1;
|
|
|
|
memcpy (data + 11 + 1 + 1, GST_BUFFER_DATA (buffer),
|
|
GST_BUFFER_SIZE (buffer));
|
|
} else {
|
|
memcpy (data + 11 + 1, GST_BUFFER_DATA (buffer),
|
|
GST_BUFFER_SIZE (buffer));
|
|
}
|
|
}
|
|
|
|
GST_WRITE_UINT32_BE (data + size - 4, size - 4);
|
|
|
|
gst_buffer_copy_metadata (tag, buffer, GST_BUFFER_COPY_TIMESTAMPS);
|
|
/* mark the buffer if it's an audio buffer and there's also video being muxed
|
|
* or it's a video interframe */
|
|
if ((mux->have_video && !cpad->video) ||
|
|
GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DELTA_UNIT))
|
|
GST_BUFFER_FLAG_SET (tag, GST_BUFFER_FLAG_DELTA_UNIT);
|
|
|
|
GST_BUFFER_OFFSET (tag) = GST_BUFFER_OFFSET_END (tag) =
|
|
GST_BUFFER_OFFSET_NONE;
|
|
|
|
return tag;
|
|
}
|
|
|
|
static inline GstBuffer *
|
|
gst_flv_mux_buffer_to_tag (GstFlvMux * mux, GstBuffer * buffer,
|
|
GstFlvPad * cpad)
|
|
{
|
|
return gst_flv_mux_buffer_to_tag_internal (mux, buffer, cpad, FALSE);
|
|
}
|
|
|
|
static inline GstBuffer *
|
|
gst_flv_mux_codec_data_buffer_to_tag (GstFlvMux * mux, GstBuffer * buffer,
|
|
GstFlvPad * cpad)
|
|
{
|
|
return gst_flv_mux_buffer_to_tag_internal (mux, buffer, cpad, TRUE);
|
|
}
|
|
|
|
static void
|
|
gst_flv_mux_put_buffer_in_streamheader (GValue * streamheader,
|
|
GstBuffer * buffer)
|
|
{
|
|
GValue value = { 0 };
|
|
GstBuffer *buf;
|
|
|
|
g_value_init (&value, GST_TYPE_BUFFER);
|
|
buf = gst_buffer_copy (buffer);
|
|
gst_value_set_buffer (&value, buf);
|
|
gst_buffer_unref (buf);
|
|
gst_value_array_append_value (streamheader, &value);
|
|
g_value_unset (&value);
|
|
}
|
|
|
|
static GstFlowReturn
|
|
gst_flv_mux_write_header (GstFlvMux * mux)
|
|
{
|
|
GstBuffer *header, *metadata;
|
|
GstBuffer *video_codec_data, *audio_codec_data;
|
|
GstCaps *caps;
|
|
GstStructure *structure;
|
|
GValue streamheader = { 0 };
|
|
GSList *l;
|
|
GstFlowReturn ret;
|
|
|
|
header = gst_flv_mux_create_header (mux);
|
|
metadata = gst_flv_mux_create_metadata (mux);
|
|
video_codec_data = NULL;
|
|
audio_codec_data = NULL;
|
|
|
|
for (l = mux->collect->data; l != NULL; l = l->next) {
|
|
GstFlvPad *cpad = l->data;
|
|
|
|
/* Get H.264 and AAC codec data, if present */
|
|
if (cpad && cpad->video && cpad->video_codec == 7) {
|
|
if (cpad->video_codec_data == NULL)
|
|
GST_WARNING_OBJECT (mux, "Codec data for video stream not found, "
|
|
"output might not be playable");
|
|
else
|
|
video_codec_data =
|
|
gst_flv_mux_codec_data_buffer_to_tag (mux, cpad->video_codec_data,
|
|
cpad);
|
|
} else if (cpad && !cpad->video && cpad->audio_codec == 10) {
|
|
if (cpad->audio_codec_data == NULL)
|
|
GST_WARNING_OBJECT (mux, "Codec data for audio stream not found, "
|
|
"output might not be playable");
|
|
else
|
|
audio_codec_data =
|
|
gst_flv_mux_codec_data_buffer_to_tag (mux, cpad->audio_codec_data,
|
|
cpad);
|
|
}
|
|
}
|
|
|
|
/* mark buffers that will go in the streamheader */
|
|
GST_BUFFER_FLAG_SET (header, GST_BUFFER_FLAG_IN_CAPS);
|
|
GST_BUFFER_FLAG_SET (metadata, GST_BUFFER_FLAG_IN_CAPS);
|
|
if (video_codec_data != NULL) {
|
|
GST_BUFFER_FLAG_SET (video_codec_data, GST_BUFFER_FLAG_IN_CAPS);
|
|
/* mark as a delta unit, so downstream will not try to synchronize on that
|
|
* buffer - to actually start playback you need a real video keyframe */
|
|
GST_BUFFER_FLAG_SET (video_codec_data, GST_BUFFER_FLAG_DELTA_UNIT);
|
|
}
|
|
if (audio_codec_data != NULL) {
|
|
GST_BUFFER_FLAG_SET (audio_codec_data, GST_BUFFER_FLAG_IN_CAPS);
|
|
}
|
|
|
|
/* put buffers in streamheader */
|
|
g_value_init (&streamheader, GST_TYPE_ARRAY);
|
|
gst_flv_mux_put_buffer_in_streamheader (&streamheader, header);
|
|
gst_flv_mux_put_buffer_in_streamheader (&streamheader, metadata);
|
|
if (video_codec_data != NULL)
|
|
gst_flv_mux_put_buffer_in_streamheader (&streamheader, video_codec_data);
|
|
if (audio_codec_data != NULL)
|
|
gst_flv_mux_put_buffer_in_streamheader (&streamheader, audio_codec_data);
|
|
|
|
/* create the caps and put the streamheader in them */
|
|
caps = gst_caps_new_simple ("video/x-flv", NULL);
|
|
caps = gst_caps_make_writable (caps);
|
|
structure = gst_caps_get_structure (caps, 0);
|
|
gst_structure_set_value (structure, "streamheader", &streamheader);
|
|
g_value_unset (&streamheader);
|
|
|
|
if (GST_PAD_CAPS (mux->srcpad) == NULL)
|
|
gst_pad_set_caps (mux->srcpad, caps);
|
|
|
|
gst_caps_unref (caps);
|
|
|
|
/* push the header buffer, the metadata and the codec info, if any */
|
|
ret = gst_flv_mux_push (mux, header);
|
|
if (ret != GST_FLOW_OK)
|
|
return ret;
|
|
ret = gst_flv_mux_push (mux, metadata);
|
|
if (ret != GST_FLOW_OK)
|
|
return ret;
|
|
if (video_codec_data != NULL) {
|
|
ret = gst_flv_mux_push (mux, video_codec_data);
|
|
if (ret != GST_FLOW_OK)
|
|
return ret;
|
|
}
|
|
if (audio_codec_data != NULL) {
|
|
ret = gst_flv_mux_push (mux, audio_codec_data);
|
|
if (ret != GST_FLOW_OK)
|
|
return ret;
|
|
}
|
|
return GST_FLOW_OK;
|
|
}
|
|
|
|
static void
|
|
gst_flv_mux_update_index (GstFlvMux * mux, GstBuffer * buffer, GstFlvPad * cpad)
|
|
{
|
|
/*
|
|
* Add the tag byte offset and to the index if it's a valid seek point, which
|
|
* means it's either a video keyframe or if there is no video pad (in that
|
|
* case every FLV tag is a valid seek point)
|
|
*/
|
|
if (mux->have_video &&
|
|
(!cpad->video ||
|
|
GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DELTA_UNIT)))
|
|
return;
|
|
|
|
if (GST_BUFFER_TIMESTAMP_IS_VALID (buffer)) {
|
|
GstFlvMuxIndexEntry *entry = g_slice_new (GstFlvMuxIndexEntry);
|
|
entry->position = mux->byte_count;
|
|
entry->time =
|
|
gst_guint64_to_gdouble (GST_BUFFER_TIMESTAMP (buffer)) / GST_SECOND;
|
|
mux->index = g_list_prepend (mux->index, entry);
|
|
}
|
|
}
|
|
|
|
static GstFlowReturn
|
|
gst_flv_mux_write_buffer (GstFlvMux * mux, GstFlvPad * cpad)
|
|
{
|
|
GstBuffer *tag;
|
|
GstBuffer *buffer =
|
|
gst_collect_pads_pop (mux->collect, (GstCollectData *) cpad);
|
|
GstFlowReturn ret;
|
|
|
|
/* arrange downstream running time */
|
|
buffer = gst_buffer_make_metadata_writable (buffer);
|
|
GST_BUFFER_TIMESTAMP (buffer) =
|
|
gst_segment_to_running_time (&cpad->collect.segment,
|
|
GST_FORMAT_TIME, GST_BUFFER_TIMESTAMP (buffer));
|
|
|
|
if (!mux->streamable)
|
|
gst_flv_mux_update_index (mux, buffer, cpad);
|
|
|
|
tag = gst_flv_mux_buffer_to_tag (mux, buffer, cpad);
|
|
|
|
gst_buffer_unref (buffer);
|
|
|
|
ret = gst_flv_mux_push (mux, tag);
|
|
|
|
if (ret == GST_FLOW_OK && GST_BUFFER_TIMESTAMP_IS_VALID (tag))
|
|
cpad->last_timestamp = GST_BUFFER_TIMESTAMP (tag);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static guint64
|
|
gst_flv_mux_determine_duration (GstFlvMux * mux)
|
|
{
|
|
GSList *l;
|
|
GstClockTime duration = GST_CLOCK_TIME_NONE;
|
|
|
|
GST_DEBUG_OBJECT (mux, "trying to determine the duration "
|
|
"from pad timestamps");
|
|
|
|
for (l = mux->collect->data; l != NULL; l = l->next) {
|
|
GstFlvPad *cpad = l->data;
|
|
|
|
if (cpad && (cpad->last_timestamp != GST_CLOCK_TIME_NONE)) {
|
|
if (duration == GST_CLOCK_TIME_NONE)
|
|
duration = cpad->last_timestamp;
|
|
else
|
|
duration = MAX (duration, cpad->last_timestamp);
|
|
}
|
|
}
|
|
|
|
if (duration == GST_CLOCK_TIME_NONE) {
|
|
GST_DEBUG_OBJECT (mux, "not able to determine duration "
|
|
"from pad timestamps, assuming 0");
|
|
return 0;
|
|
}
|
|
|
|
return duration;
|
|
}
|
|
|
|
static GstFlowReturn
|
|
gst_flv_mux_rewrite_header (GstFlvMux * mux)
|
|
{
|
|
GstBuffer *rewrite, *index, *tmp;
|
|
GstEvent *event;
|
|
guint8 *data;
|
|
gdouble d;
|
|
GList *l;
|
|
guint32 index_len, allocate_size;
|
|
guint32 i, index_skip;
|
|
|
|
if (mux->streamable)
|
|
return GST_FLOW_OK;
|
|
|
|
/* seek back to the preallocated index space */
|
|
event = gst_event_new_new_segment (FALSE, 1.0, GST_FORMAT_BYTES,
|
|
13 + 29, GST_CLOCK_TIME_NONE, 13 + 29);
|
|
if (!gst_pad_push_event (mux->srcpad, event)) {
|
|
GST_WARNING_OBJECT (mux, "Seek to rewrite header failed");
|
|
return GST_FLOW_OK;
|
|
}
|
|
|
|
/* if we were not able to determine the duration before, set it now */
|
|
if (mux->duration == GST_CLOCK_TIME_NONE)
|
|
mux->duration = gst_flv_mux_determine_duration (mux);
|
|
|
|
/* rewrite the duration tag */
|
|
d = gst_guint64_to_gdouble (mux->duration);
|
|
d /= (gdouble) GST_SECOND;
|
|
|
|
GST_DEBUG_OBJECT (mux, "determined the final duration to be %f", d);
|
|
|
|
rewrite = gst_flv_mux_create_number_script_value ("duration", d);
|
|
|
|
/* rewrite the filesize tag */
|
|
d = gst_guint64_to_gdouble (mux->byte_count);
|
|
|
|
GST_DEBUG_OBJECT (mux, "putting total filesize %f in the metadata", d);
|
|
|
|
tmp = gst_flv_mux_create_number_script_value ("filesize", d);
|
|
rewrite = gst_buffer_join (rewrite, tmp);
|
|
|
|
if (!mux->index) {
|
|
/* no index, so push buffer and return */
|
|
return gst_flv_mux_push (mux, rewrite);
|
|
}
|
|
|
|
/* rewrite the index */
|
|
mux->index = g_list_reverse (mux->index);
|
|
index_len = g_list_length (mux->index);
|
|
|
|
/* We write at most MAX_INDEX_ENTRIES elements */
|
|
if (index_len > MAX_INDEX_ENTRIES) {
|
|
index_skip = 1 + index_len / MAX_INDEX_ENTRIES;
|
|
index_len = (index_len + index_skip - 1) / index_skip;
|
|
} else {
|
|
index_skip = 1;
|
|
}
|
|
|
|
GST_DEBUG_OBJECT (mux, "Index length is %d", index_len);
|
|
/* see size calculation in gst_flv_mux_preallocate_index */
|
|
allocate_size = 11 + 8 + 22 + 10 + index_len * 18;
|
|
GST_DEBUG_OBJECT (mux, "Allocating %d bytes for index", allocate_size);
|
|
index = gst_buffer_new_and_alloc (allocate_size);
|
|
data = GST_BUFFER_DATA (index);
|
|
|
|
GST_WRITE_UINT16_BE (data, 9); /* the 'keyframes' key */
|
|
memcpy (data + 2, "keyframes", 9);
|
|
GST_WRITE_UINT8 (data + 11, 8); /* nested ECMA array */
|
|
GST_WRITE_UINT32_BE (data + 12, 2); /* two elements */
|
|
GST_WRITE_UINT16_BE (data + 16, 5); /* first string key: 'times' */
|
|
memcpy (data + 18, "times", 5);
|
|
GST_WRITE_UINT8 (data + 23, 10); /* strict array */
|
|
GST_WRITE_UINT32_BE (data + 24, index_len);
|
|
data += 28;
|
|
|
|
/* the keyframes' times */
|
|
for (i = 0, l = mux->index; l; l = l->next, i++) {
|
|
GstFlvMuxIndexEntry *entry = l->data;
|
|
|
|
if (i % index_skip != 0)
|
|
continue;
|
|
GST_WRITE_UINT8 (data, 0); /* numeric (aka double) */
|
|
GST_WRITE_DOUBLE_BE (data + 1, entry->time);
|
|
data += 9;
|
|
}
|
|
|
|
GST_WRITE_UINT16_BE (data, 13); /* second string key: 'filepositions' */
|
|
memcpy (data + 2, "filepositions", 13);
|
|
GST_WRITE_UINT8 (data + 15, 10); /* strict array */
|
|
GST_WRITE_UINT32_BE (data + 16, index_len);
|
|
data += 20;
|
|
|
|
/* the keyframes' file positions */
|
|
for (i = 0, l = mux->index; l; l = l->next, i++) {
|
|
GstFlvMuxIndexEntry *entry = l->data;
|
|
|
|
if (i % index_skip != 0)
|
|
continue;
|
|
GST_WRITE_UINT8 (data, 0);
|
|
GST_WRITE_DOUBLE_BE (data + 1, entry->position);
|
|
data += 9;
|
|
}
|
|
|
|
GST_WRITE_UINT24_BE (data, 9); /* finish the ECMA array */
|
|
|
|
/* If there is space left in the prefilled area, reinsert the filler.
|
|
There is at least 18 bytes free, so it will always fit. */
|
|
if (index_len < MAX_INDEX_ENTRIES) {
|
|
GstBuffer *tmp;
|
|
guint8 *data;
|
|
guint32 remaining_filler_size;
|
|
|
|
tmp = gst_buffer_new_and_alloc (14);
|
|
data = GST_BUFFER_DATA (tmp);
|
|
GST_WRITE_UINT16_BE (data, 9);
|
|
memcpy (data + 2, "gstfiller", 9);
|
|
GST_WRITE_UINT8 (data + 11, 2); /* string */
|
|
|
|
/* There is 18 bytes per remaining index entry minus what is used for
|
|
* the'gstfiller' key. The rest is already filled with spaces, so just need
|
|
* to update length. */
|
|
remaining_filler_size = (MAX_INDEX_ENTRIES - index_len) * 18 - 14;
|
|
GST_DEBUG_OBJECT (mux, "Remaining filler size is %d bytes",
|
|
remaining_filler_size);
|
|
GST_WRITE_UINT16_BE (data + 12, remaining_filler_size);
|
|
index = gst_buffer_join (index, tmp);
|
|
}
|
|
|
|
rewrite = gst_buffer_join (rewrite, index);
|
|
|
|
gst_buffer_set_caps (rewrite, GST_PAD_CAPS (mux->srcpad));
|
|
return gst_flv_mux_push (mux, rewrite);
|
|
}
|
|
|
|
static GstFlowReturn
|
|
gst_flv_mux_collected (GstCollectPads * pads, gpointer user_data)
|
|
{
|
|
GstFlvMux *mux = GST_FLV_MUX (user_data);
|
|
GstFlvPad *best;
|
|
GstClockTime best_time;
|
|
GstFlowReturn ret;
|
|
GSList *sl;
|
|
gboolean eos = TRUE;
|
|
|
|
if (mux->state == GST_FLV_MUX_STATE_HEADER) {
|
|
if (mux->collect->data == NULL) {
|
|
GST_ELEMENT_ERROR (mux, STREAM, MUX, (NULL),
|
|
("No input streams configured"));
|
|
return GST_FLOW_ERROR;
|
|
}
|
|
|
|
if (gst_pad_push_event (mux->srcpad,
|
|
gst_event_new_new_segment (FALSE, 1.0, GST_FORMAT_BYTES, 0, -1, 0)))
|
|
ret = gst_flv_mux_write_header (mux);
|
|
else
|
|
ret = GST_FLOW_ERROR;
|
|
|
|
if (ret != GST_FLOW_OK)
|
|
return ret;
|
|
mux->state = GST_FLV_MUX_STATE_DATA;
|
|
}
|
|
|
|
if (mux->new_tags) {
|
|
GstBuffer *buf = gst_flv_mux_create_metadata (mux);
|
|
gst_flv_mux_push (mux, buf);
|
|
mux->new_tags = FALSE;
|
|
}
|
|
|
|
|
|
best = NULL;
|
|
best_time = GST_CLOCK_TIME_NONE;
|
|
for (sl = mux->collect->data; sl; sl = sl->next) {
|
|
GstFlvPad *cpad = sl->data;
|
|
GstBuffer *buffer = gst_collect_pads_peek (pads, (GstCollectData *) cpad);
|
|
GstClockTime time;
|
|
|
|
if (!buffer)
|
|
continue;
|
|
|
|
eos = FALSE;
|
|
|
|
time = GST_BUFFER_TIMESTAMP (buffer);
|
|
gst_buffer_unref (buffer);
|
|
|
|
/* Use buffers without valid timestamp first */
|
|
if (!GST_CLOCK_TIME_IS_VALID (time)) {
|
|
GST_WARNING_OBJECT (pads, "Buffer without valid timestamp");
|
|
|
|
best_time = cpad->last_timestamp;
|
|
best = cpad;
|
|
break;
|
|
}
|
|
|
|
time = gst_segment_to_running_time (&cpad->collect.segment,
|
|
GST_FORMAT_TIME, time);
|
|
if (G_UNLIKELY (!GST_CLOCK_TIME_IS_VALID (time))) {
|
|
GST_DEBUG_OBJECT (mux, "clipping buffer on pad %s outside segment",
|
|
GST_PAD_NAME (cpad->collect.pad));
|
|
buffer = gst_collect_pads_pop (pads, (GstCollectData *) cpad);
|
|
gst_buffer_unref (buffer);
|
|
return GST_FLOW_OK;
|
|
}
|
|
|
|
if (best == NULL || (GST_CLOCK_TIME_IS_VALID (best_time)
|
|
&& time < best_time)) {
|
|
best = cpad;
|
|
best_time = time;
|
|
}
|
|
}
|
|
|
|
/* The FLV timestamp is an int32 field. For non-live streams error out if a
|
|
bigger timestamp is seen, for live the timestamp will get wrapped in
|
|
gst_flv_mux_buffer_to_tag */
|
|
if (!mux->streamable && GST_CLOCK_TIME_IS_VALID (best_time)
|
|
&& best_time / GST_MSECOND > G_MAXINT32) {
|
|
GST_WARNING_OBJECT (mux, "Timestamp larger than FLV supports - EOS");
|
|
eos = TRUE;
|
|
}
|
|
|
|
if (!eos && best) {
|
|
return gst_flv_mux_write_buffer (mux, best);
|
|
} else if (eos) {
|
|
gst_flv_mux_rewrite_header (mux);
|
|
gst_pad_push_event (mux->srcpad, gst_event_new_eos ());
|
|
return GST_FLOW_UNEXPECTED;
|
|
} else {
|
|
return GST_FLOW_OK;
|
|
}
|
|
}
|
|
|
|
static void
|
|
gst_flv_mux_get_property (GObject * object,
|
|
guint prop_id, GValue * value, GParamSpec * pspec)
|
|
{
|
|
GstFlvMux *mux = GST_FLV_MUX (object);
|
|
|
|
switch (prop_id) {
|
|
case PROP_STREAMABLE:
|
|
g_value_set_boolean (value, mux->streamable);
|
|
break;
|
|
default:
|
|
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void
|
|
gst_flv_mux_set_property (GObject * object,
|
|
guint prop_id, const GValue * value, GParamSpec * pspec)
|
|
{
|
|
GstFlvMux *mux = GST_FLV_MUX (object);
|
|
|
|
switch (prop_id) {
|
|
case PROP_STREAMABLE:
|
|
mux->streamable = g_value_get_boolean (value);
|
|
if (mux->streamable)
|
|
gst_tag_setter_set_tag_merge_mode (GST_TAG_SETTER (mux),
|
|
GST_TAG_MERGE_REPLACE);
|
|
else
|
|
gst_tag_setter_set_tag_merge_mode (GST_TAG_SETTER (mux),
|
|
GST_TAG_MERGE_KEEP);
|
|
break;
|
|
default:
|
|
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static GstStateChangeReturn
|
|
gst_flv_mux_change_state (GstElement * element, GstStateChange transition)
|
|
{
|
|
GstStateChangeReturn ret;
|
|
GstFlvMux *mux = GST_FLV_MUX (element);
|
|
|
|
switch (transition) {
|
|
case GST_STATE_CHANGE_NULL_TO_READY:
|
|
break;
|
|
case GST_STATE_CHANGE_READY_TO_PAUSED:
|
|
gst_collect_pads_start (mux->collect);
|
|
break;
|
|
case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
|
|
break;
|
|
case GST_STATE_CHANGE_PAUSED_TO_READY:
|
|
gst_collect_pads_stop (mux->collect);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
|
|
|
|
switch (transition) {
|
|
case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
|
|
break;
|
|
case GST_STATE_CHANGE_PAUSED_TO_READY:
|
|
gst_flv_mux_reset (GST_ELEMENT (mux));
|
|
break;
|
|
case GST_STATE_CHANGE_READY_TO_NULL:
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return ret;
|
|
}
|