/* GStreamer * * Copyright (c) 2008,2009 Sebastian Dröge * * 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. */ /** * SECTION:element-flvmux * * flvmux muxes different streams into an FLV file. * * * Example launch line * |[ * 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. * ]| This pipeline muxes an audio and video file into a single FLV file. * */ #ifdef HAVE_CONFIG_H #include "config.h" #endif #include #include #include "gstflvmux.h" GST_DEBUG_CATEGORY_STATIC (flvmux_debug); #define GST_CAT_DEFAULT flvmux_debug enum { PROP_0, PROP_STREAMABLE }; #define DEFAULT_STREAMABLE FALSE #define MAX_INDEX_ENTRIES 128 static GstStaticPadTemplate src_templ = GST_STATIC_PAD_TEMPLATE ("src", GST_PAD_SRC, GST_PAD_ALWAYS, GST_STATIC_CAPS ("video/x-flv") ); static GstStaticPadTemplate videosink_templ = GST_STATIC_PAD_TEMPLATE ("video", GST_PAD_SINK, GST_PAD_REQUEST, GST_STATIC_CAPS ("video/x-flash-video; " "video/x-flash-screen; " "video/x-vp6-flash; " "video/x-vp6-alpha; " "video/x-h264;") ); static GstStaticPadTemplate audiosink_templ = GST_STATIC_PAD_TEMPLATE ("audio", GST_PAD_SINK, GST_PAD_REQUEST, GST_STATIC_CAPS ("audio/x-adpcm, layout = (string) swf, channels = (int) { 1, 2 }, rate = (int) { 5512, 11025, 22050, 44100 }; " "audio/mpeg, mpegversion = (int) 1, layer = (int) 3, channels = (int) { 1, 2 }, rate = (int) { 5512, 8000, 11025, 22050, 44100 }, parsed = (boolean) TRUE; " "audio/mpeg, mpegversion = (int) 4, framed = (boolean) TRUE; " "audio/x-nellymoser, channels = (int) { 1, 2 }, rate = (int) { 5512, 8000, 11025, 16000, 22050, 44100 }; " "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; " "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; " "audio/x-alaw, channels = (int) { 1, 2 }, rate = (int) { 5512, 11025, 22050, 44100 }; " "audio/x-mulaw, channels = (int) { 1, 2 }, rate = (int) { 5512, 11025, 22050, 44100 }; " "audio/x-speex, channels = (int) { 1, 2 }, rate = (int) { 5512, 11025, 22050, 44100 };") ); #define _do_init(type) \ G_STMT_START{ \ static const GInterfaceInfo tag_setter_info = { \ NULL, \ NULL, \ NULL \ }; \ g_type_add_interface_static (type, GST_TYPE_TAG_SETTER, \ &tag_setter_info); \ }G_STMT_END GST_BOILERPLATE_FULL (GstFlvMux, gst_flv_mux, GstElement, GST_TYPE_ELEMENT, _do_init); static void gst_flv_mux_finalize (GObject * object); static GstFlowReturn gst_flv_mux_collected (GstCollectPads * pads, gpointer user_data); static gboolean gst_flv_mux_handle_src_event (GstPad * pad, GstEvent * event); static GstPad *gst_flv_mux_request_new_pad (GstElement * element, GstPadTemplate * templ, const gchar * name); static void gst_flv_mux_release_pad (GstElement * element, GstPad * pad); static void gst_flv_mux_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec); static void gst_flv_mux_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec); static GstStateChangeReturn gst_flv_mux_change_state (GstElement * element, GstStateChange transition); static void gst_flv_mux_reset (GstElement * element); typedef struct { gdouble position; gdouble time; } GstFlvMuxIndexEntry; static void gst_flv_mux_index_entry_free (GstFlvMuxIndexEntry * entry) { g_slice_free (GstFlvMuxIndexEntry, entry); } static void gst_flv_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 (&videosink_templ)); gst_element_class_add_pad_template (element_class, gst_static_pad_template_get (&audiosink_templ)); gst_element_class_add_pad_template (element_class, gst_static_pad_template_get (&src_templ)); gst_element_class_set_details_simple (element_class, "FLV muxer", "Codec/Muxer", "Muxes video/audio streams into a FLV stream", "Sebastian Dröge "); GST_DEBUG_CATEGORY_INIT (flvmux_debug, "flvmux", 0, "FLV muxer"); } static void gst_flv_mux_class_init (GstFlvMuxClass * klass) { GObjectClass *gobject_class; GstElementClass *gstelement_class; GST_DEBUG_CATEGORY_INIT (flvmux_debug, "flvmux", 0, "FLV muxer"); gobject_class = (GObjectClass *) klass; gstelement_class = (GstElementClass *) klass; gobject_class->get_property = gst_flv_mux_get_property; gobject_class->set_property = gst_flv_mux_set_property; gobject_class->finalize = gst_flv_mux_finalize; /* FIXME: ideally the right mode of operation should be detected * automatically using queries when parameter not specified. */ /** * GstFlvMux:streamable * * If True, the output will be streaming friendly. (ie without indexes and * duration) * * Since: 0.10.24 **/ g_object_class_install_property (gobject_class, PROP_STREAMABLE, g_param_spec_boolean ("streamable", "streamable", "If set to true, the output should be as if it is to be streamed " "and hence no indexes written or duration written.", DEFAULT_STREAMABLE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); gstelement_class->change_state = GST_DEBUG_FUNCPTR (gst_flv_mux_change_state); gstelement_class->request_new_pad = GST_DEBUG_FUNCPTR (gst_flv_mux_request_new_pad); gstelement_class->release_pad = GST_DEBUG_FUNCPTR (gst_flv_mux_release_pad); } static void gst_flv_mux_init (GstFlvMux * mux, GstFlvMuxClass * g_class) { mux->srcpad = gst_pad_new_from_static_template (&src_templ, "src"); gst_pad_set_event_function (mux->srcpad, gst_flv_mux_handle_src_event); gst_element_add_pad (GST_ELEMENT (mux), mux->srcpad); /* property */ mux->streamable = DEFAULT_STREAMABLE; mux->new_tags = FALSE; mux->collect = gst_collect_pads_new (); gst_collect_pads_set_function (mux->collect, (GstCollectPadsFunction) GST_DEBUG_FUNCPTR (gst_flv_mux_collected), mux); gst_flv_mux_reset (GST_ELEMENT (mux)); } static void gst_flv_mux_finalize (GObject * object) { GstFlvMux *mux = GST_FLV_MUX (object); gst_object_unref (mux->collect); G_OBJECT_CLASS (parent_class)->finalize (object); } static void gst_flv_mux_reset (GstElement * element) { GstFlvMux *mux = GST_FLV_MUX (element); GSList *sl; while ((sl = mux->collect->data) != NULL) { GstFlvPad *cpad = (GstFlvPad *) sl->data; gst_element_release_request_pad (element, cpad->collect.pad); } g_list_foreach (mux->index, (GFunc) gst_flv_mux_index_entry_free, NULL); g_list_free (mux->index); mux->index = NULL; mux->byte_count = 0; mux->have_audio = mux->have_video = FALSE; mux->duration = GST_CLOCK_TIME_NONE; mux->new_tags = FALSE; mux->state = GST_FLV_MUX_STATE_HEADER; /* tags */ gst_tag_setter_reset_tags (GST_TAG_SETTER (mux)); } static gboolean gst_flv_mux_handle_src_event (GstPad * pad, GstEvent * event) { GstEventType type; 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 gboolean gst_flv_mux_handle_sink_event (GstPad * pad, GstEvent * event) { GstFlvMux *mux = GST_FLV_MUX (gst_pad_get_parent (pad)); gboolean ret = TRUE; switch (GST_EVENT_TYPE (event)) { case GST_EVENT_TAG:{ GstTagList *list; GstTagSetter *setter = GST_TAG_SETTER (mux); const GstTagMergeMode mode = gst_tag_setter_get_tag_merge_mode (setter); gst_event_parse_tag (event, &list); gst_tag_setter_merge_tags (setter, list, mode); mux->new_tags = TRUE; break; } case GST_EVENT_NEWSEGMENT: /* We don't support NEWSEGMENT events */ ret = FALSE; gst_event_unref (event); break; default: break; } /* now GstCollectPads can take care of the rest, e.g. EOS */ if (ret) ret = mux->collect_event (pad, event); gst_object_unref (mux); return ret; } static gboolean gst_flv_mux_video_pad_setcaps (GstPad * pad, GstCaps * caps) { GstFlvMux *mux = GST_FLV_MUX (gst_pad_get_parent (pad)); GstFlvPad *cpad = (GstFlvPad *) gst_pad_get_element_private (pad); gboolean ret = TRUE; GstStructure *s; s = gst_caps_get_structure (caps, 0); if (strcmp (gst_structure_get_name (s), "video/x-flash-video") == 0) { cpad->video_codec = 2; } else if (strcmp (gst_structure_get_name (s), "video/x-flash-screen") == 0) { cpad->video_codec = 3; } else if (strcmp (gst_structure_get_name (s), "video/x-vp6-flash") == 0) { cpad->video_codec = 4; } else if (strcmp (gst_structure_get_name (s), "video/x-vp6-alpha") == 0) { cpad->video_codec = 5; } else if (strcmp (gst_structure_get_name (s), "video/x-h264") == 0) { cpad->video_codec = 7; } 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->video_codec_data = gst_buffer_ref (gst_value_get_buffer (val)); } gst_object_unref (mux); return ret; } static gboolean gst_flv_mux_audio_pad_setcaps (GstPad * pad, GstCaps * caps) { GstFlvMux *mux = GST_FLV_MUX (gst_pad_get_parent (pad)); GstFlvPad *cpad = (GstFlvPad *) gst_pad_get_element_private (pad); gboolean ret = TRUE; GstStructure *s; s = gst_caps_get_structure (caps, 0); if (strcmp (gst_structure_get_name (s), "audio/x-adpcm") == 0) { const gchar *layout = gst_structure_get_string (s, "layout"); if (layout && strcmp (layout, "swf") == 0) { cpad->audio_codec = 1; } else { ret = FALSE; } } else if (strcmp (gst_structure_get_name (s), "audio/mpeg") == 0) { gint mpegversion; if (gst_structure_get_int (s, "mpegversion", &mpegversion)) { if (mpegversion == 1) { gint layer; if (gst_structure_get_int (s, "layer", &layer) && layer == 3) { gint rate; if (gst_structure_get_int (s, "rate", &rate) && rate == 8000) cpad->audio_codec = 14; else cpad->audio_codec = 2; } else { ret = FALSE; } } else if (mpegversion == 4) { cpad->audio_codec = 10; } else { ret = FALSE; } } else { ret = FALSE; } } else if (strcmp (gst_structure_get_name (s), "audio/x-nellymoser") == 0) { gint rate, channels; if (gst_structure_get_int (s, "rate", &rate) && gst_structure_get_int (s, "channels", &channels)) { if (channels == 1 && rate == 16000) cpad->audio_codec = 4; else if (channels == 1 && rate == 8000) cpad->audio_codec = 5; else cpad->audio_codec = 6; } else { cpad->audio_codec = 6; } } else if (strcmp (gst_structure_get_name (s), "audio/x-raw-int") == 0) { gint endianness; if (gst_structure_get_int (s, "endianness", &endianness) && endianness == G_LITTLE_ENDIAN) cpad->audio_codec = 3; else ret = FALSE; } else if (strcmp (gst_structure_get_name (s), "audio/x-alaw") == 0) { cpad->audio_codec = 7; } else if (strcmp (gst_structure_get_name (s), "audio/x-mulaw") == 0) { cpad->audio_codec = 8; } else if (strcmp (gst_structure_get_name (s), "audio/x-speex") == 0) { cpad->audio_codec = 11; } else { ret = FALSE; } if (ret) { gint rate, channels, width; if (gst_structure_get_int (s, "rate", &rate)) { if (cpad->audio_codec == 10) cpad->rate = 3; else if (rate == 5512) cpad->rate = 0; else if (rate == 11025) cpad->rate = 1; else if (rate == 22050) cpad->rate = 2; else if (rate == 44100) cpad->rate = 3; else if (rate == 8000 && (cpad->audio_codec == 5 || cpad->audio_codec == 14)) cpad->rate = 0; else if (rate == 16000 && cpad->audio_codec == 4) cpad->rate = 0; else ret = FALSE; } else if (cpad->audio_codec == 10) { cpad->rate = 3; } else { ret = FALSE; } if (gst_structure_get_int (s, "channels", &channels)) { if (cpad->audio_codec == 4 || cpad->audio_codec == 5 || cpad->audio_codec == 6) cpad->channels = 0; else if (cpad->audio_codec == 10) cpad->channels = 1; else if (channels == 1) cpad->channels = 0; else if (channels == 2) cpad->channels = 1; else ret = FALSE; } else if (cpad->audio_codec == 4 || cpad->audio_codec == 5 || cpad->audio_codec == 6) { cpad->channels = 0; } else if (cpad->audio_codec == 10) { cpad->channels = 1; } else { ret = FALSE; } if (gst_structure_get_int (s, "width", &width)) { if (cpad->audio_codec != 3) cpad->width = 1; 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: 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 */ tmp = gst_flv_mux_create_number_script_value ("duration", 0); 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; 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; } 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; }