/* * GStreamer * Copyright 2005 Thomas Vander Stichele * Copyright 2005 Ronald S. Bultje * Copyright 2008 Vincent Penquerc'h * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER * DEALINGS IN THE SOFTWARE. * * Alternatively, the contents of this file may be used under the * GNU Lesser General Public License Version 2.1 (the "LGPL"), in * which case the following provisions apply instead of the ones * mentioned above: * * 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-tiger * @see_also: katedec * * * * This element decodes and renders Kate streams * Kate is a free codec * for text based data, such as subtitles. Any number of kate streams can be * embedded in an Ogg stream. * * * libkate (see above url) and libtiger * are needed to build this element. * * Example pipeline * * This pipeline renders a Kate stream on top of a Theora video multiplexed * in the same stream: * * gst-launch \ * filesrc location=video.ogg ! oggdemux name=demux \ * demux. ! queue ! theoradec ! ffmpegcolorspace ! tiger name=tiger \ * demux. ! queue ! kateparse ! tiger. \ * tiger. ! ffmpegcolorspace ! autovideosink * * * */ #ifdef HAVE_CONFIG_H #include "config.h" #endif #include #include #include #include "gstkate.h" #include "gstkatetiger.h" GST_DEBUG_CATEGORY_EXTERN (gst_katetiger_debug); #define GST_CAT_DEFAULT gst_katetiger_debug #define GST_KATE_TIGER_MUTEX_LOCK(element) \ do { \ /*GST_LOG_OBJECT ((element), "locking from %s:%d\n",__FILE__,__LINE__);*/ \ g_mutex_lock ((element)->mutex); \ /*GST_LOG_OBJECT ((element), "ready from %s:%d\n",__FILE__,__LINE__);*/ \ } while(0) #define GST_KATE_TIGER_MUTEX_UNLOCK(element) \ do { \ /*GST_LOG_OBJECT ((element), "unlocking from %s:%d\n",__FILE__,__LINE__);*/ \ g_mutex_unlock ((element)->mutex); \ } while(0) /* Filter signals and args */ enum { /* FILL ME */ LAST_SIGNAL }; enum { ARG_DEFAULT_FONT_DESC = DECODER_BASE_ARG_COUNT, ARG_QUALITY, ARG_DEFAULT_FONT_EFFECT, ARG_DEFAULT_FONT_EFFECT_STRENGTH, ARG_DEFAULT_FONT_RED, ARG_DEFAULT_FONT_GREEN, ARG_DEFAULT_FONT_BLUE, ARG_DEFAULT_FONT_ALPHA, ARG_DEFAULT_BACKGROUND_RED, ARG_DEFAULT_BACKGROUND_GREEN, ARG_DEFAULT_BACKGROUND_BLUE, ARG_DEFAULT_BACKGROUND_ALPHA, ARG_SILENT }; static GstStaticPadTemplate kate_sink_factory = GST_STATIC_PAD_TEMPLATE ("subtitle_sink", GST_PAD_SINK, GST_PAD_ALWAYS, GST_STATIC_CAPS ("subtitle/x-kate; application/x-kate") ); #if G_BYTE_ORDER == G_LITTLE_ENDIAN #define TIGER_VIDEO_CAPS \ GST_VIDEO_CAPS_xRGB ", endianness = (int)1234; " \ GST_VIDEO_CAPS_BGRx ", endianness = (int)4321" #else #define TIGER_VIDEO_CAPS \ GST_VIDEO_CAPS_BGRx ", endianness = (int)4321; " \ GST_VIDEO_CAPS_xRGB ", endianness = (int)1234" #endif static GstStaticPadTemplate video_sink_factory = GST_STATIC_PAD_TEMPLATE ("video_sink", GST_PAD_SINK, GST_PAD_ALWAYS, GST_STATIC_CAPS (TIGER_VIDEO_CAPS)); static GstStaticPadTemplate src_factory = GST_STATIC_PAD_TEMPLATE ("src", GST_PAD_SRC, GST_PAD_ALWAYS, GST_STATIC_CAPS (TIGER_VIDEO_CAPS)); GST_BOILERPLATE (GstKateTiger, gst_kate_tiger, GstElement, GST_TYPE_ELEMENT); static GType gst_kate_tiger_font_effect_get_type (void) { static GType font_effect_type = 0; if (!font_effect_type) { static const GEnumValue font_effects[] = { {tiger_font_plain, "none", "none"}, {tiger_font_shadow, "shadow", "shadow"}, {tiger_font_outline, "outline", "outline"}, {0, NULL, NULL} }; font_effect_type = g_enum_register_static ("GstFontEffect", font_effects); } return font_effect_type; } static void gst_kate_tiger_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec); static void gst_kate_tiger_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec); static void gst_kate_tiger_dispose (GObject * object); static GstFlowReturn gst_kate_tiger_kate_chain (GstPad * pad, GstBuffer * buf); static GstFlowReturn gst_kate_tiger_video_chain (GstPad * pad, GstBuffer * buf); static GstStateChangeReturn gst_kate_tiger_change_state (GstElement * element, GstStateChange transition); static gboolean gst_kate_tiger_kate_sink_query (GstPad * pad, GstQuery * query); static gboolean gst_kate_tiger_kate_event (GstPad * pad, GstEvent * event); static gboolean gst_kate_tiger_video_event (GstPad * pad, GstEvent * event); static gboolean gst_kate_tiger_video_set_caps (GstPad * pad, GstCaps * caps); static gboolean gst_kate_tiger_source_event (GstPad * pad, GstEvent * event); static void gst_kate_tiger_base_init (gpointer gclass) { GstElementClass *element_class = GST_ELEMENT_CLASS (gclass); gst_element_class_add_pad_template (element_class, gst_static_pad_template_get (&src_factory)); gst_element_class_add_pad_template (element_class, gst_static_pad_template_get (&kate_sink_factory)); gst_element_class_add_pad_template (element_class, gst_static_pad_template_get (&video_sink_factory)); gst_element_class_set_details_simple (element_class, "Kate stream renderer", "Mixer/Video/Overlay/Subtitle", "Decodes and renders Kate streams on top of a video", "Vincent Penquerc'h "); } /* initialize the plugin's class */ static void gst_kate_tiger_class_init (GstKateTigerClass * klass) { GObjectClass *gobject_class; GstElementClass *gstelement_class; gobject_class = (GObjectClass *) klass; gstelement_class = (GstElementClass *) klass; gobject_class->get_property = GST_DEBUG_FUNCPTR (gst_kate_tiger_get_property); gobject_class->set_property = GST_DEBUG_FUNCPTR (gst_kate_tiger_set_property); gobject_class->dispose = GST_DEBUG_FUNCPTR (gst_kate_tiger_dispose); gst_kate_util_install_decoder_base_properties (gobject_class); g_object_class_install_property (gobject_class, ARG_QUALITY, g_param_spec_double ("quality", "Rendering quality", "Rendering quality (0 is faster, 1 is best and slower)", 0.0, 1.0, 1.0, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, ARG_DEFAULT_FONT_DESC, g_param_spec_string ("default-font-desc", "Default font description", "Default font description (Pango style) to render text with", "", G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, ARG_DEFAULT_FONT_EFFECT, g_param_spec_enum ("default-font-effect", "Default font effect", "Whether to apply an effect to text by default, for increased readability", gst_kate_tiger_font_effect_get_type (), tiger_font_outline, G_PARAM_READWRITE | G_PARAM_CONSTRUCT | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, ARG_DEFAULT_FONT_EFFECT_STRENGTH, g_param_spec_double ("default-font-effect-strength", "Default font effect strength", "How pronounced should the font effect be (effect dependent)", 0.0, 1.0, 0.5, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, ARG_DEFAULT_FONT_RED, g_param_spec_int ("default-font-red", "Default font color (red component)", "Default font color (red component, between 0 and 255) to render text with", 0, 255, 255, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, ARG_DEFAULT_FONT_GREEN, g_param_spec_int ("default-font-green", "Default font color (green component)", "Default font color (green component, between 0 and 255) to render text with", 0, 255, 255, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, ARG_DEFAULT_FONT_BLUE, g_param_spec_int ("default-font-blue", "Default font color (blue component)", "Default font color (blue component, between 0 and 255) to render text with", 0, 255, 255, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, ARG_DEFAULT_FONT_ALPHA, g_param_spec_int ("default-font-alpha", "Default font color (alpha component)", "Default font color (alpha component, between 0 and 255) to render text with", 0, 255, 255, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, ARG_DEFAULT_BACKGROUND_RED, g_param_spec_int ("default-background-red", "Default background color (red component)", "Default background color (red component, between 0 and 255) to render text with", 0, 255, 255, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, ARG_DEFAULT_BACKGROUND_GREEN, g_param_spec_int ("default-background-green", "Default background color (green component)", "Default background color (green component, between 0 and 255) to render text with", 0, 255, 255, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, ARG_DEFAULT_BACKGROUND_BLUE, g_param_spec_int ("default-background-blue", "Default background color (blue component)", "Default background color (blue component, between 0 and 255) to render text with", 0, 255, 255, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, ARG_DEFAULT_BACKGROUND_ALPHA, g_param_spec_int ("default-background-alpha", "Default background color (alpha component)", "Default background color (alpha component, between 0 and 255) to render text with", 0, 255, 255, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); /* FIXME 0.11: rename to "visible" or "text-visible" or "render-text" */ g_object_class_install_property (gobject_class, ARG_SILENT, g_param_spec_boolean ("silent", "silent", "Whether to render the stream", FALSE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); gstelement_class->change_state = GST_DEBUG_FUNCPTR (gst_kate_tiger_change_state); } /* initialize the new element * instantiate pads and add them to element * set functions * initialize structure */ static void gst_kate_tiger_init (GstKateTiger * tiger, GstKateTigerClass * gclass) { GST_DEBUG_OBJECT (tiger, "gst_kate_tiger_init"); tiger->mutex = g_mutex_new (); tiger->cond = g_cond_new (); tiger->katesinkpad = gst_pad_new_from_static_template (&kate_sink_factory, "subtitle_sink"); gst_pad_set_chain_function (tiger->katesinkpad, GST_DEBUG_FUNCPTR (gst_kate_tiger_kate_chain)); gst_pad_set_query_function (tiger->katesinkpad, GST_DEBUG_FUNCPTR (gst_kate_tiger_kate_sink_query)); gst_pad_set_event_function (tiger->katesinkpad, GST_DEBUG_FUNCPTR (gst_kate_tiger_kate_event)); gst_element_add_pad (GST_ELEMENT (tiger), tiger->katesinkpad); tiger->videosinkpad = gst_pad_new_from_static_template (&video_sink_factory, "video_sink"); gst_pad_set_chain_function (tiger->videosinkpad, GST_DEBUG_FUNCPTR (gst_kate_tiger_video_chain)); gst_pad_use_fixed_caps (tiger->videosinkpad); gst_pad_set_setcaps_function (tiger->videosinkpad, GST_DEBUG_FUNCPTR (gst_kate_tiger_video_set_caps)); gst_pad_set_event_function (tiger->videosinkpad, GST_DEBUG_FUNCPTR (gst_kate_tiger_video_event)); gst_element_add_pad (GST_ELEMENT (tiger), tiger->videosinkpad); tiger->srcpad = gst_pad_new_from_static_template (&src_factory, "src"); gst_pad_set_event_function (tiger->srcpad, gst_kate_tiger_source_event); gst_pad_use_fixed_caps (tiger->srcpad); gst_element_add_pad (GST_ELEMENT (tiger), tiger->srcpad); gst_kate_util_decode_base_init (&tiger->decoder, FALSE); tiger->tr = NULL; tiger->default_font_desc = NULL; tiger->quality = -1.0; tiger->default_font_effect = tiger_font_outline; tiger->default_font_effect_strength = 0.5; tiger->default_font_r = 255; tiger->default_font_g = 255; tiger->default_font_b = 255; tiger->default_font_a = 255; tiger->default_background_r = 0; tiger->default_background_g = 0; tiger->default_background_b = 0; tiger->default_background_a = 0; tiger->silent = FALSE; tiger->video_width = 0; tiger->video_height = 0; tiger->seen_header = FALSE; } static void gst_kate_tiger_dispose (GObject * object) { GstKateTiger *tiger = GST_KATE_TIGER (object); GST_LOG_OBJECT (tiger, "disposing"); if (tiger->default_font_desc) { g_free (tiger->default_font_desc); tiger->default_font_desc = NULL; } g_cond_free (tiger->cond); tiger->cond = NULL; g_mutex_free (tiger->mutex); tiger->mutex = NULL; GST_CALL_PARENT (G_OBJECT_CLASS, dispose, (object)); } static void gst_kate_tiger_update_quality (GstKateTiger * tiger) { if (tiger->tr && tiger->quality >= 0.0) { tiger_renderer_set_quality (tiger->tr, tiger->quality); } } static void gst_kate_tiger_update_default_font_effect (GstKateTiger * tiger) { if (tiger->tr) { tiger_renderer_set_default_font_effect (tiger->tr, tiger->default_font_effect, tiger->default_font_effect_strength); } } static void gst_kate_tiger_update_default_font_color (GstKateTiger * tiger) { if (tiger->tr) { tiger_renderer_set_default_font_color (tiger->tr, tiger->default_font_r / 255.0, tiger->default_font_g / 255.0, tiger->default_font_b / 255.0, tiger->default_font_a / 255.0); } } static void gst_kate_tiger_update_default_background_color (GstKateTiger * tiger) { if (tiger->tr) { tiger_renderer_set_default_background_fill_color (tiger->tr, tiger->default_background_r / 255.0, tiger->default_background_g / 255.0, tiger->default_background_b / 255.0, tiger->default_background_a / 255.0); } } static void gst_kate_tiger_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec) { GstKateTiger *tiger = GST_KATE_TIGER (object); const char *str; GST_KATE_TIGER_MUTEX_LOCK (tiger); switch (prop_id) { case ARG_DEFAULT_FONT_DESC: if (tiger->default_font_desc) { g_free (tiger->default_font_desc); tiger->default_font_desc = NULL; } str = g_value_get_string (value); if (str) { tiger->default_font_desc = g_strdup (str); if (tiger->tr) tiger_renderer_set_default_font_description (tiger->tr, tiger->default_font_desc); } break; case ARG_QUALITY: tiger->quality = g_value_get_double (value); gst_kate_tiger_update_quality (tiger); break; case ARG_DEFAULT_FONT_EFFECT: tiger->default_font_effect = g_value_get_enum (value); gst_kate_tiger_update_default_font_effect (tiger); break; case ARG_DEFAULT_FONT_EFFECT_STRENGTH: tiger->default_font_effect_strength = g_value_get_double (value); gst_kate_tiger_update_default_font_effect (tiger); break; case ARG_DEFAULT_FONT_RED: tiger->default_font_r = g_value_get_int (value); gst_kate_tiger_update_default_font_color (tiger); break; case ARG_DEFAULT_FONT_GREEN: tiger->default_font_g = g_value_get_int (value); gst_kate_tiger_update_default_font_color (tiger); break; case ARG_DEFAULT_FONT_BLUE: tiger->default_font_b = g_value_get_int (value); gst_kate_tiger_update_default_font_color (tiger); break; case ARG_DEFAULT_FONT_ALPHA: tiger->default_font_a = g_value_get_int (value); gst_kate_tiger_update_default_font_color (tiger); break; case ARG_DEFAULT_BACKGROUND_RED: tiger->default_background_r = g_value_get_int (value); gst_kate_tiger_update_default_background_color (tiger); break; case ARG_DEFAULT_BACKGROUND_GREEN: tiger->default_background_g = g_value_get_int (value); gst_kate_tiger_update_default_background_color (tiger); break; case ARG_DEFAULT_BACKGROUND_BLUE: tiger->default_background_b = g_value_get_int (value); gst_kate_tiger_update_default_background_color (tiger); break; case ARG_DEFAULT_BACKGROUND_ALPHA: tiger->default_background_a = g_value_get_int (value); gst_kate_tiger_update_default_background_color (tiger); break; case ARG_SILENT: tiger->silent = g_value_get_boolean (value); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } GST_KATE_TIGER_MUTEX_UNLOCK (tiger); } static void gst_kate_tiger_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec) { GstKateTiger *tiger = GST_KATE_TIGER (object); GST_KATE_TIGER_MUTEX_LOCK (tiger); switch (prop_id) { case ARG_DEFAULT_FONT_DESC: g_value_set_string (value, tiger->default_font_desc ? tiger->default_font_desc : ""); break; case ARG_QUALITY: g_value_set_double (value, tiger->quality); break; case ARG_DEFAULT_FONT_EFFECT: g_value_set_enum (value, tiger->default_font_effect); break; case ARG_DEFAULT_FONT_EFFECT_STRENGTH: g_value_set_double (value, tiger->default_font_effect_strength); break; case ARG_DEFAULT_FONT_RED: g_value_set_int (value, tiger->default_font_r); break; case ARG_DEFAULT_FONT_GREEN: g_value_set_int (value, tiger->default_font_g); break; case ARG_DEFAULT_FONT_BLUE: g_value_set_int (value, tiger->default_font_b); break; case ARG_DEFAULT_FONT_ALPHA: g_value_set_int (value, tiger->default_font_a); break; case ARG_DEFAULT_BACKGROUND_RED: g_value_set_int (value, tiger->default_background_r); break; case ARG_DEFAULT_BACKGROUND_GREEN: g_value_set_int (value, tiger->default_background_g); break; case ARG_DEFAULT_BACKGROUND_BLUE: g_value_set_int (value, tiger->default_background_b); break; case ARG_DEFAULT_BACKGROUND_ALPHA: g_value_set_int (value, tiger->default_background_a); break; case ARG_SILENT: g_value_set_boolean (value, tiger->silent); break; default: if (!gst_kate_util_decoder_base_get_property (&tiger->decoder, object, prop_id, value, pspec)) { G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); } break; } GST_KATE_TIGER_MUTEX_UNLOCK (tiger); } /* GstElement vmethod implementations */ /* chain function * this function does the actual processing */ static GstFlowReturn gst_kate_tiger_kate_chain (GstPad * pad, GstBuffer * buf) { GstKateTiger *tiger = GST_KATE_TIGER (gst_pad_get_parent (pad)); const kate_event *ev = NULL; GstFlowReturn rflow = GST_FLOW_OK; GST_KATE_TIGER_MUTEX_LOCK (tiger); GST_LOG_OBJECT (tiger, "Got kate buffer, caps %" GST_PTR_FORMAT, GST_BUFFER_CAPS (buf)); /* Now that we have the lock, check if we're flushing */ if (tiger->decoder.kate_flushing) { GST_DEBUG_OBJECT (tiger, "Flushing, disregarding buffer"); goto done; } /* Unfortunately, it can happen that the start of the stream is not sent, for instance if there's a stream selector upstream, which is switched from another Kate stream. If this happens, then we can fallback on the headers stored in the caps (if any). */ if (!tiger->seen_header) { if (GST_BUFFER_SIZE (buf) == 0 || (GST_BUFFER_DATA (buf)[0] & 0x80) == 0) { /* Not a header, try to fall back on caps */ GstStructure *s; const GValue *streamheader; GST_INFO_OBJECT (tiger, "Headers not seen, start of stream is cut off"); s = gst_caps_get_structure (GST_BUFFER_CAPS (buf), 0); streamheader = gst_structure_get_value (s, "streamheader"); if (streamheader && G_VALUE_TYPE (streamheader) == GST_TYPE_ARRAY) { GstPad *tagpad = gst_pad_get_peer (pad); GArray *array; gint i; GST_INFO_OBJECT (tiger, "Falling back on caps to initialize decoder"); array = g_value_peek_pointer (streamheader); for (i = 0; i < array->len; i++) { GValue *value = &g_array_index (array, GValue, i); if (G_VALUE_TYPE (value) == GST_TYPE_BUFFER) { GstBuffer *hbuf = g_value_peek_pointer (value); gst_buffer_ref (hbuf); rflow = gst_kate_util_decoder_base_chain_kate_packet (&tiger->decoder, GST_ELEMENT_CAST (tiger), pad, hbuf, tiger->srcpad, tagpad, NULL, NULL); } else { GST_WARNING_OBJECT (tiger, "Streamheader index %d does not hold a buffer", i); } } gst_object_unref (tagpad); tiger->seen_header = TRUE; } else { GST_WARNING_OBJECT (tiger, "No headers seen, and no headers on caps"); } } else { tiger->seen_header = TRUE; } } if (gst_kate_util_decoder_base_update_segment (&tiger->decoder, GST_ELEMENT_CAST (tiger), buf)) { GstPad *tagpad = gst_pad_get_peer (pad); rflow = gst_kate_util_decoder_base_chain_kate_packet (&tiger->decoder, GST_ELEMENT_CAST (tiger), pad, buf, tiger->srcpad, tagpad, NULL, &ev); if (G_LIKELY (rflow == GST_FLOW_OK)) { if (ev) { int ret = tiger_renderer_add_event (tiger->tr, ev->ki, ev); GST_INFO_OBJECT (tiger, "adding event for %p from %f to %f: %p, \"%s\"", ev->ki, ev->start_time, ev->end_time, ev->bitmap, ev->text); if (G_UNLIKELY (ret < 0)) { GST_WARNING_OBJECT (tiger, "failed to add Kate event to Tiger renderer: %d", ret); } } } gst_object_unref (tagpad); } /* we want to avoid shooting ahead of the video stream, or we will get segment updates which will place us ahead of it, and we won't be able to convert a video timestamp back into a kate timestamp */ if (G_LIKELY (GST_BUFFER_TIMESTAMP_IS_VALID (buf))) { while (1) { gint64 kate_time, video_time; kate_time = gst_segment_to_running_time (&tiger->decoder.kate_segment, GST_FORMAT_TIME, GST_BUFFER_TIMESTAMP (buf)); video_time = gst_segment_to_running_time (&tiger->video_segment, GST_FORMAT_TIME, tiger->video_segment.last_stop); GST_DEBUG_OBJECT (tiger, "Kate time %.2f, video time %.2f (kts %ld)", kate_time / (float) GST_SECOND, video_time / (float) GST_SECOND, (long) GST_BUFFER_TIMESTAMP (buf)); if (kate_time <= video_time) { break; } GST_LOG_OBJECT (tiger, "Waiting to return from chain function"); g_cond_wait (tiger->cond, tiger->mutex); if (tiger->decoder.kate_flushing) { GST_DEBUG_OBJECT (tiger, "Flushing while waiting"); break; } GST_LOG_OBJECT (tiger, "Woken up, checking time again"); } } done: GST_KATE_TIGER_MUTEX_UNLOCK (tiger); gst_object_unref (tiger); gst_buffer_unref (buf); return rflow; } static gboolean gst_kate_tiger_video_set_caps (GstPad * pad, GstCaps * caps) { GstKateTiger *tiger = GST_KATE_TIGER (gst_pad_get_parent (pad)); GstVideoFormat format; gint w, h; gboolean ret; GST_KATE_TIGER_MUTEX_LOCK (tiger); /* Cairo expects ARGB in native endianness, and that's what we get as we've forced it in the caps. We might allow swapped red/blue at some point, and get tiger to swap, to make some cases faster */ tiger->swap_rgb = FALSE; if (gst_video_format_parse_caps (caps, &format, &w, &h)) { tiger->video_width = w; tiger->video_height = h; } GST_KATE_TIGER_MUTEX_UNLOCK (tiger); ret = gst_pad_set_caps (tiger->srcpad, caps); gst_object_unref (tiger); return ret; } static gdouble gst_kate_tiger_get_time (GstKateTiger * tiger) { gint64 rt = gst_segment_to_running_time (&tiger->video_segment, GST_FORMAT_TIME, tiger->video_segment.last_stop); gint64 pos = gst_segment_to_position (&tiger->decoder.kate_segment, GST_FORMAT_TIME, rt); return pos / (gdouble) GST_SECOND; } static GstFlowReturn gst_kate_tiger_video_chain (GstPad * pad, GstBuffer * buf) { GstKateTiger *tiger = GST_KATE_TIGER (gst_pad_get_parent (pad)); GstFlowReturn rflow = GST_FLOW_OK; unsigned char *ptr; int ret; kate_float t; GST_KATE_TIGER_MUTEX_LOCK (tiger); GST_LOG_OBJECT (tiger, "got video frame, %u bytes", GST_BUFFER_SIZE (buf)); if (G_UNLIKELY (tiger->video_flushing)) { GST_KATE_TIGER_MUTEX_UNLOCK (tiger); gst_object_unref (tiger); gst_buffer_unref (buf); return GST_FLOW_WRONG_STATE; } if (G_LIKELY (GST_BUFFER_TIMESTAMP_IS_VALID (buf))) { gst_segment_set_last_stop (&tiger->video_segment, GST_FORMAT_TIME, GST_BUFFER_TIMESTAMP (buf)); g_cond_broadcast (tiger->cond); } /* Update first with a dummy buffer pointer we cannot write to. If there is nothing to draw, we will not have to make it writeable */ ptr = GST_BUFFER_DATA (buf); ret = tiger_renderer_set_buffer (tiger->tr, ptr, tiger->video_width, tiger->video_height, tiger->video_width * 4, tiger->swap_rgb); if (G_UNLIKELY (ret < 0)) { GST_WARNING_OBJECT (tiger, "Tiger renderer failed to set buffer to video frame: %d", ret); goto pass; } /* update the renderer at the time of the video frame */ t = gst_kate_tiger_get_time (tiger); GST_LOG_OBJECT (tiger, "Video segment calc: last stop %ld, time %.3f", (long) tiger->video_segment.last_stop, t); ret = tiger_renderer_update (tiger->tr, t, 1); if (G_UNLIKELY (ret < 0)) { GST_WARNING_OBJECT (tiger, "Tiger renderer failed to update: %d", ret); goto pass; } /* if there nothing to draw, we can just push the video buffer as is */ if (ret > 0 || tiger->silent) goto pass; /* there is something to draw, so first make the buffer writable */ buf = gst_buffer_make_writable (buf); if (G_UNLIKELY (!buf)) { GST_WARNING_OBJECT (tiger, "Failed to make video buffer writable"); goto pass; } /* and setup that buffer before rendering */ ptr = GST_BUFFER_DATA (buf); ret = tiger_renderer_set_buffer (tiger->tr, ptr, tiger->video_width, tiger->video_height, tiger->video_width * 4, tiger->swap_rgb); if (G_UNLIKELY (ret < 0)) { GST_WARNING_OBJECT (tiger, "Tiger renderer failed to set buffer to video frame: %d", ret); goto pass; } ret = tiger_renderer_render (tiger->tr); if (G_UNLIKELY (ret < 0)) { GST_WARNING_OBJECT (tiger, "Tiger renderer failed to render to video frame: %d", ret); } else { GST_LOG_OBJECT (tiger, "Tiger renderer rendered on video frame at %f", t); } pass: GST_KATE_TIGER_MUTEX_UNLOCK (tiger); rflow = gst_pad_push (tiger->srcpad, buf); gst_object_unref (tiger); return rflow; } static GstStateChangeReturn gst_kate_tiger_change_state (GstElement * element, GstStateChange transition) { GstKateTiger *tiger = GST_KATE_TIGER (element); GstStateChangeReturn res; switch (transition) { case GST_STATE_CHANGE_PAUSED_TO_READY: GST_DEBUG_OBJECT (tiger, "PAUSED -> READY, clearing kate state"); GST_KATE_TIGER_MUTEX_LOCK (tiger); gst_kate_util_decoder_base_set_flushing (&tiger->decoder, TRUE); g_cond_broadcast (tiger->cond); if (tiger->tr) { tiger_renderer_destroy (tiger->tr); tiger->tr = NULL; } gst_segment_init (&tiger->video_segment, GST_FORMAT_UNDEFINED); tiger->video_flushing = TRUE; GST_KATE_TIGER_MUTEX_UNLOCK (tiger); break; default: break; } res = gst_kate_decoder_base_change_state (&tiger->decoder, element, parent_class, transition); switch (transition) { case GST_STATE_CHANGE_READY_TO_PAUSED: GST_DEBUG_OBJECT (tiger, "READY -> PAUSED, initializing kate state"); GST_KATE_TIGER_MUTEX_LOCK (tiger); if (tiger->decoder.initialized) { int ret = tiger_renderer_create (&tiger->tr); if (ret < 0) { GST_WARNING_OBJECT (tiger, "failed to create tiger renderer: %d", ret); } else { ret = tiger_renderer_set_default_font_description (tiger->tr, tiger->default_font_desc); if (ret < 0) { GST_WARNING_OBJECT (tiger, "failed to set tiger default font description: %d", ret); } gst_kate_tiger_update_default_font_color (tiger); gst_kate_tiger_update_default_background_color (tiger); gst_kate_tiger_update_default_font_effect (tiger); gst_kate_tiger_update_quality (tiger); } } gst_segment_init (&tiger->video_segment, GST_FORMAT_UNDEFINED); tiger->video_flushing = FALSE; tiger->seen_header = FALSE; GST_KATE_TIGER_MUTEX_UNLOCK (tiger); break; default: break; } return res; } static gboolean gst_kate_tiger_seek (GstKateTiger * tiger, GstPad * pad, GstEvent * event) { GstFormat format; gdouble rate; GstSeekFlags flags; GstSeekType cur_type, stop_type; gint64 cur, stop; gst_event_parse_seek (event, &rate, &format, &flags, &cur_type, &cur, &stop_type, &stop); if (flags & GST_SEEK_FLAG_FLUSH) gst_pad_push_event (tiger->srcpad, gst_event_new_flush_start ()); GST_KATE_TIGER_MUTEX_LOCK (tiger); tiger->video_flushing = TRUE; gst_kate_util_decoder_base_set_flushing (&tiger->decoder, TRUE); g_cond_broadcast (tiger->cond); GST_KATE_TIGER_MUTEX_UNLOCK (tiger); if (format == GST_FORMAT_TIME) { /* if seeking in time, we can update tiger to remove any appropriate events */ kate_float target; switch (cur_type) { case GST_SEEK_TYPE_SET: target = cur / (float) GST_SECOND; break; case GST_SEEK_TYPE_CUR: GST_WARNING_OBJECT (tiger, "Seeking from the current segment, cannot work out target so flushing everything"); target = (kate_float) 0; break; case GST_SEEK_TYPE_END: GST_WARNING_OBJECT (tiger, "Seeking from the end, cannot work out target so flushing everything"); target = (kate_float) 0; break; default: GST_WARNING_OBJECT (tiger, "Unexpected seek type"); target = (kate_float) 0; break; } GST_INFO_OBJECT (tiger, "Seeking in time to %f", target); GST_KATE_TIGER_MUTEX_LOCK (tiger); tiger_renderer_seek (tiger->tr, target); GST_KATE_TIGER_MUTEX_UNLOCK (tiger); } /* forward to both sinks */ gst_event_ref (event); if (gst_pad_push_event (tiger->videosinkpad, event)) { int ret = gst_pad_push_event (tiger->katesinkpad, event); if (ret) { return TRUE; } else { return FALSE; } } else { gst_event_unref (event); return FALSE; } } static gboolean gst_kate_tiger_source_event (GstPad * pad, GstEvent * event) { GstKateTiger *tiger = (GstKateTiger *) (gst_object_get_parent (GST_OBJECT (pad))); gboolean res = TRUE; g_return_val_if_fail (tiger != NULL, FALSE); GST_LOG_OBJECT (tiger, "Event on source pad: %s", GST_EVENT_TYPE_NAME (event)); switch (GST_EVENT_TYPE (event)) { case GST_EVENT_SEEK: GST_INFO_OBJECT (tiger, "Seek on source pad"); res = gst_kate_tiger_seek (tiger, pad, event); break; default: res = gst_pad_event_default (pad, event); break; } gst_object_unref (tiger); return res; } static gboolean gst_kate_tiger_handle_kate_event (GstPad * pad, GstEvent * event) { GstKateTiger *tiger = (GstKateTiger *) (gst_object_get_parent (GST_OBJECT (pad))); gboolean res = TRUE; switch (GST_EVENT_TYPE (event)) { case GST_EVENT_NEWSEGMENT: GST_INFO_OBJECT (tiger, "New segment on Kate pad"); GST_KATE_TIGER_MUTEX_LOCK (tiger); g_cond_broadcast (tiger->cond); gst_kate_util_decoder_base_new_segment_event (&tiger->decoder, event); GST_KATE_TIGER_MUTEX_UNLOCK (tiger); gst_event_unref (event); break; case GST_EVENT_FLUSH_START: GST_KATE_TIGER_MUTEX_LOCK (tiger); gst_kate_util_decoder_base_set_flushing (&tiger->decoder, TRUE); GST_KATE_TIGER_MUTEX_UNLOCK (tiger); g_cond_broadcast (tiger->cond); gst_event_unref (event); break; case GST_EVENT_FLUSH_STOP: GST_KATE_TIGER_MUTEX_LOCK (tiger); gst_kate_util_decoder_base_set_flushing (&tiger->decoder, FALSE); GST_KATE_TIGER_MUTEX_UNLOCK (tiger); gst_event_unref (event); break; case GST_EVENT_EOS: /* we ignore this, it just means we don't have anymore Kate packets, but the Tiger renderer will still draw (if appropriate) on incoming video */ GST_INFO_OBJECT (tiger, "EOS on Kate pad"); GST_KATE_TIGER_MUTEX_LOCK (tiger); g_cond_broadcast (tiger->cond); GST_KATE_TIGER_MUTEX_UNLOCK (tiger); gst_event_unref (event); break; default: res = gst_pad_event_default (pad, event); break; } gst_object_unref (tiger); return res; } static gboolean gst_kate_tiger_kate_event (GstPad * pad, GstEvent * event) { GstKateTiger *tiger = (GstKateTiger *) (gst_object_get_parent (GST_OBJECT (pad))); gboolean res = TRUE; g_return_val_if_fail (tiger != NULL, FALSE); GST_LOG_OBJECT (tiger, "Event on Kate pad: %s", GST_EVENT_TYPE_NAME (event)); /* Delay events till we've set caps */ if (gst_kate_util_decoder_base_queue_event (&tiger->decoder, event, &gst_kate_tiger_handle_kate_event, pad)) { gst_object_unref (tiger); return TRUE; } res = gst_kate_tiger_handle_kate_event (pad, event); gst_object_unref (tiger); return res; } static gboolean gst_kate_tiger_handle_video_event (GstPad * pad, GstEvent * event) { GstKateTiger *tiger = (GstKateTiger *) (gst_object_get_parent (GST_OBJECT (pad))); gboolean res = TRUE; switch (GST_EVENT_TYPE (event)) { case GST_EVENT_NEWSEGMENT: { gboolean update; gdouble rate, arate; GstFormat format; gint64 start, stop, time; gst_event_parse_new_segment_full (event, &update, &rate, &arate, &format, &start, &stop, &time); if (format == GST_FORMAT_TIME) { GST_DEBUG_OBJECT (tiger, "video pad segment:" " Update %d, rate %g arate %g format %d start %" GST_TIME_FORMAT " %" GST_TIME_FORMAT " position %" GST_TIME_FORMAT, update, rate, arate, format, GST_TIME_ARGS (start), GST_TIME_ARGS (stop), GST_TIME_ARGS (time)); GST_KATE_TIGER_MUTEX_LOCK (tiger); gst_segment_set_newsegment_full (&tiger->video_segment, update, rate, arate, format, start, stop, time); GST_KATE_TIGER_MUTEX_UNLOCK (tiger); } res = gst_pad_event_default (pad, event); break; } case GST_EVENT_FLUSH_START: GST_KATE_TIGER_MUTEX_LOCK (tiger); gst_segment_init (&tiger->video_segment, GST_FORMAT_UNDEFINED); tiger->video_flushing = TRUE; GST_KATE_TIGER_MUTEX_UNLOCK (tiger); g_cond_broadcast (tiger->cond); res = gst_pad_event_default (pad, event); break; case GST_EVENT_FLUSH_STOP: GST_KATE_TIGER_MUTEX_LOCK (tiger); gst_segment_init (&tiger->video_segment, GST_FORMAT_UNDEFINED); tiger->video_flushing = FALSE; GST_KATE_TIGER_MUTEX_UNLOCK (tiger); res = gst_pad_event_default (pad, event); break; default: res = gst_pad_event_default (pad, event); break; } gst_object_unref (tiger); return res; } static gboolean gst_kate_tiger_video_event (GstPad * pad, GstEvent * event) { GstKateTiger *tiger = (GstKateTiger *) (gst_object_get_parent (GST_OBJECT (pad))); gboolean res = TRUE; g_return_val_if_fail (tiger != NULL, FALSE); GST_INFO_OBJECT (tiger, "Event on video pad: %s", GST_EVENT_TYPE_NAME (event)); res = gst_kate_tiger_handle_video_event (pad, event); gst_object_unref (tiger); return res; } gboolean gst_kate_tiger_kate_sink_query (GstPad * pad, GstQuery * query) { GstKateTiger *tiger = GST_KATE_TIGER (gst_pad_get_parent (pad)); gboolean res = gst_kate_decoder_base_sink_query (&tiger->decoder, GST_ELEMENT_CAST (tiger), pad, query); GST_INFO_OBJECT (tiger, "Query on Kate pad"); gst_object_unref (tiger); return res; }