mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-12-19 14:56:36 +00:00
3ffd78787d
Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-bad/-/merge_requests/2273>
559 lines
17 KiB
C++
559 lines
17 KiB
C++
/* Copyright (C) <2018, 2019> Philippe Normand <philn@igalia.com>
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* Copyright (C) <2018, 2019> Žan Doberšek <zdobersek@igalia.com>
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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., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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/**
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* SECTION:element-wpesrc
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* @title: wpesrc
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*
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* The wpesrc element is used to produce a video texture representing a web page
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* rendered off-screen by WPE.
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*
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* Starting from WPEBackend-FDO 1.6.x, software rendering support is available. This
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* features allows wpesrc to be used on machines without GPU, and/or for testing
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* purpose. To enable it, set the `LIBGL_ALWAYS_SOFTWARE=true` environment
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* variable and make sure `video/x-raw, format=BGRA` caps are negotiated by the
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* wpesrc element.
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*
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* ## Example launch lines
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*
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* ### Show the GStreamer website homepage
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*
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* ```
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* gst-launch-1.0 -v wpesrc location="https://gstreamer.freedesktop.org" ! queue ! glimagesink
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* ```
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*
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* ### Save the first 50 video frames generated for the GStreamer website as PNG files in /tmp
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*
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* ```
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* LIBGL_ALWAYS_SOFTWARE=true gst-launch-1.0 -v wpesrc num-buffers=50 location="https://gstreamer.freedesktop.org" ! videoconvert ! pngenc ! multifilesink location=/tmp/snapshot-%05d.png
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* ```
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*
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*
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* ### Show the GStreamer website homepage as played with GstPlayer in a GTK+ window
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*
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* ```
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* gst-play-1.0 --videosink gtkglsink wpe://https://gstreamer.freedesktop.org
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* ```
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*
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* ### Composite WPE with a video stream in a single OpenGL scene
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*
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* ```
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* gst-launch-1.0 glvideomixer name=m sink_1::zorder=0 ! glimagesink wpesrc location="file:///home/phil/Downloads/plunk/index.html" draw-background=0 ! m. videotestsrc ! queue ! glupload ! glcolorconvert ! m.
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* ```
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*
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*
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* ### Composite WPE with a video stream, sink_0 pad properties have to match the video dimensions
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*
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* ```
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* gst-launch-1.0 glvideomixer name=m sink_1::zorder=0 sink_0::height=818 sink_0::width=1920 ! gtkglsink wpesrc location="file:///home/phil/Downloads/plunk/index.html" draw-background=0 ! m. uridecodebin uri="http://192.168.1.44/Sintel.2010.1080p.mkv" name=d d. ! queue ! glupload ! glcolorconvert ! m.
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* ```
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*
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* Additionally, any audio stream created by WPE is exposed as "sometimes" audio
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* source pads.
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*
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* This source also relays GStreamer bus messages from the GStreamer pipelines
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* running inside the web pages. Error, warning and info messages are made ours
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* with the addition of the following fields into the GstMessage details (See
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* gst_message_parse_error_details(), gst_message_parse_warning_details() and
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* gst_message_parse_info_details()):
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*
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* * `wpesrc_original_src_path`: [Path](gst_object_get_path_string) of the
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* original element posting the message
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*
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* Other message types are posted as [element custom](gst_message_new_custom)
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* messages reusing the same GstStructure as the one from the message from the
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* message posted in the web page with the addition of the following fields:
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*
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* * `wpesrc_original_message_type`: Type of the original message from
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* gst_message_type_get_name().
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* * `wpesrc_original_src_name`: Name of the original element posting the
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* message
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* * `wpesrc_original_src_type`: Name of the GType of the original element
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* posting the message
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* * `wpesrc_original_src_path`: [Path](gst_object_get_path_string) of the
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* original element positing the message
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*
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* Note: This feature will be disabled if you disable the tracer subsystem.
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*/
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#include "gstwpesrcbin.h"
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#include "gstwpevideosrc.h"
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#include "gstwpe.h"
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#include "WPEThreadedView.h"
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#include <gst/allocators/allocators.h>
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#include <gst/base/gstflowcombiner.h>
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#include <wpe/extensions/audio.h>
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#include <sys/mman.h>
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#include <unistd.h>
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G_DEFINE_TYPE (GstWpeAudioPad, gst_wpe_audio_pad, GST_TYPE_GHOST_PAD);
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static void
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gst_wpe_audio_pad_class_init (GstWpeAudioPadClass * klass)
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{
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}
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static void
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gst_wpe_audio_pad_init (GstWpeAudioPad * pad)
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{
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gst_audio_info_init (&pad->info);
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pad->discont_pending = FALSE;
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pad->buffer_time = GST_CLOCK_TIME_NONE;
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}
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static GstWpeAudioPad *
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gst_wpe_audio_pad_new (const gchar * name)
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{
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GstWpeAudioPad *pad = GST_WPE_AUDIO_PAD (g_object_new (gst_wpe_audio_pad_get_type (),
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"name", name, "direction", GST_PAD_SRC, NULL));
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if (!gst_ghost_pad_construct (GST_GHOST_PAD (pad))) {
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gst_object_unref (pad);
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return NULL;
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}
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return pad;
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}
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struct _GstWpeSrc
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{
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GstBin parent;
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GstAllocator *fd_allocator;
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GstElement *video_src;
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GHashTable *audio_src_pads;
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GstFlowCombiner *flow_combiner;
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};
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enum
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{
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PROP_0,
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PROP_LOCATION,
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PROP_DRAW_BACKGROUND
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};
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enum
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{
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SIGNAL_LOAD_BYTES,
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LAST_SIGNAL
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};
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static guint gst_wpe_video_src_signals[LAST_SIGNAL] = { 0 };
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static void gst_wpe_src_uri_handler_init (gpointer iface, gpointer data);
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GST_DEBUG_CATEGORY_EXTERN (wpe_src_debug);
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#define GST_CAT_DEFAULT wpe_src_debug
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#define gst_wpe_src_parent_class parent_class
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G_DEFINE_TYPE_WITH_CODE (GstWpeSrc, gst_wpe_src, GST_TYPE_BIN,
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G_IMPLEMENT_INTERFACE (GST_TYPE_URI_HANDLER, gst_wpe_src_uri_handler_init));
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/**
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* GstWpeSrc!video
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*
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* Since: 1.20
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*/
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static GstStaticPadTemplate video_src_factory =
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GST_STATIC_PAD_TEMPLATE ("video", GST_PAD_SRC, GST_PAD_SOMETIMES,
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GST_STATIC_CAPS ("video/x-raw(memory:GLMemory), "
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"format = (string) RGBA, "
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"width = " GST_VIDEO_SIZE_RANGE ", "
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"height = " GST_VIDEO_SIZE_RANGE ", "
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"framerate = " GST_VIDEO_FPS_RANGE ", "
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"pixel-aspect-ratio = (fraction)1/1,"
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"texture-target = (string)2D"
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"; video/x-raw, "
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"format = (string) BGRA, "
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"width = " GST_VIDEO_SIZE_RANGE ", "
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"height = " GST_VIDEO_SIZE_RANGE ", "
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"framerate = " GST_VIDEO_FPS_RANGE ", "
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"pixel-aspect-ratio = (fraction)1/1"
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));
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/**
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* GstWpeSrc!audio_%u
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*
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* Each audio stream in the renderer web page will expose the and `audio_%u`
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* #GstPad.
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*
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* Since: 1.20
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*/
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static GstStaticPadTemplate audio_src_factory =
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GST_STATIC_PAD_TEMPLATE ("audio_%u", GST_PAD_SRC, GST_PAD_SOMETIMES,
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GST_STATIC_CAPS ( \
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GST_AUDIO_CAPS_MAKE (GST_AUDIO_NE (F32)) ", layout=(string)interleaved; " \
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GST_AUDIO_CAPS_MAKE (GST_AUDIO_NE (F64)) ", layout=(string)interleaved; " \
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GST_AUDIO_CAPS_MAKE (GST_AUDIO_NE (S16)) ", layout=(string)interleaved" \
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));
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static GstFlowReturn
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gst_wpe_src_chain_buffer (GstPad * pad, GstObject * parent, GstBuffer * buffer)
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{
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GstWpeSrc *src = GST_WPE_SRC (gst_object_get_parent (parent));
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GstFlowReturn result, chain_result;
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chain_result = gst_proxy_pad_chain_default (pad, GST_OBJECT_CAST (src), buffer);
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result = gst_flow_combiner_update_pad_flow (src->flow_combiner, pad, chain_result);
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gst_object_unref (src);
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if (result == GST_FLOW_FLUSHING)
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return chain_result;
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return result;
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}
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void
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gst_wpe_src_new_audio_stream (GstWpeSrc *src, guint32 id, GstCaps *caps, const gchar *stream_id)
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{
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GstWpeAudioPad *audio_pad;
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GstPad *pad;
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gchar *name;
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GstEvent *stream_start;
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GstSegment segment;
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name = g_strdup_printf ("audio_%u", id);
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audio_pad = gst_wpe_audio_pad_new (name);
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pad = GST_PAD_CAST (audio_pad);
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g_free (name);
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gst_pad_set_active (pad, TRUE);
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gst_element_add_pad (GST_ELEMENT_CAST (src), pad);
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gst_flow_combiner_add_pad (src->flow_combiner, pad);
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GST_DEBUG_OBJECT (src, "Adding pad: %" GST_PTR_FORMAT, pad);
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stream_start = gst_event_new_stream_start (stream_id);
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gst_pad_push_event (pad, stream_start);
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gst_audio_info_from_caps (&audio_pad->info, caps);
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gst_pad_push_event (pad, gst_event_new_caps (caps));
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gst_segment_init (&segment, GST_FORMAT_TIME);
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gst_pad_push_event (pad, gst_event_new_segment (&segment));
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g_hash_table_insert (src->audio_src_pads, GUINT_TO_POINTER (id), audio_pad);
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}
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void
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gst_wpe_src_set_audio_shm (GstWpeSrc* src, GUnixFDList *fds, guint32 id)
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{
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gint fd;
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GstWpeAudioPad *audio_pad = GST_WPE_AUDIO_PAD (g_hash_table_lookup (src->audio_src_pads, GUINT_TO_POINTER (id)));
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g_return_if_fail (GST_IS_WPE_SRC (src));
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g_return_if_fail (fds);
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g_return_if_fail (g_unix_fd_list_get_length (fds) == 1);
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g_return_if_fail (audio_pad->fd <= 0);
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fd = g_unix_fd_list_get (fds, 0, NULL);
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g_return_if_fail (fd >= 0);
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if (audio_pad->fd > 0)
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close(audio_pad->fd);
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audio_pad->fd = dup(fd);
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}
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void
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gst_wpe_src_push_audio_buffer (GstWpeSrc* src, guint32 id, guint64 size)
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{
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GstWpeAudioPad *audio_pad = GST_WPE_AUDIO_PAD (g_hash_table_lookup (src->audio_src_pads, GUINT_TO_POINTER (id)));
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GstBuffer *buffer;
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GstClock *clock;
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g_return_if_fail (audio_pad->fd > 0);
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GST_TRACE_OBJECT (audio_pad, "Handling incoming audio packet");
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gpointer data = mmap (0, size, PROT_READ, MAP_PRIVATE, audio_pad->fd, 0);
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buffer = gst_buffer_new_wrapped (g_memdup(data, size), size);
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munmap (data, size);
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gst_buffer_add_audio_meta (buffer, &audio_pad->info, size, NULL);
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clock = gst_element_get_clock (GST_ELEMENT_CAST (src));
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if (clock) {
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GstClockTime now;
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GstClockTime base_time = gst_element_get_base_time (GST_ELEMENT_CAST (src));
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now = gst_clock_get_time (clock);
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if (now > base_time)
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now -= base_time;
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else
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now = 0;
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gst_object_unref (clock);
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audio_pad->buffer_time = now;
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GST_BUFFER_DTS (buffer) = audio_pad->buffer_time;
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}
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GST_BUFFER_FLAG_UNSET (buffer, GST_BUFFER_FLAG_DISCONT);
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if (audio_pad->discont_pending) {
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GST_BUFFER_FLAG_SET (buffer, GST_BUFFER_FLAG_DISCONT);
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audio_pad->discont_pending = FALSE;
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}
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gst_flow_combiner_update_pad_flow (src->flow_combiner, GST_PAD (audio_pad),
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gst_pad_push (GST_PAD_CAST (audio_pad), buffer));
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}
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static void
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gst_wpe_src_remove_audio_pad (GstWpeSrc *src, GstPad *pad)
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{
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GST_DEBUG_OBJECT (src, "Removing pad: %" GST_PTR_FORMAT, pad);
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gst_element_remove_pad (GST_ELEMENT_CAST (src), pad);
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gst_flow_combiner_remove_pad (src->flow_combiner, pad);
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}
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void
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gst_wpe_src_stop_audio_stream(GstWpeSrc* src, guint32 id)
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{
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GstPad *pad = GST_PAD (g_hash_table_lookup (src->audio_src_pads, GUINT_TO_POINTER (id)));
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g_return_if_fail (GST_IS_PAD (pad));
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GST_INFO_OBJECT(pad, "Stopping");
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gst_pad_push_event (pad, gst_event_new_eos ());
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gst_wpe_src_remove_audio_pad (src, pad);
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g_hash_table_remove (src->audio_src_pads, GUINT_TO_POINTER (id));
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}
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void
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gst_wpe_src_pause_audio_stream(GstWpeSrc* src, guint32 id)
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{
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GstWpeAudioPad *audio_pad = GST_WPE_AUDIO_PAD (g_hash_table_lookup (src->audio_src_pads, GUINT_TO_POINTER (id)));
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GstPad *pad = GST_PAD_CAST (audio_pad);
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g_return_if_fail (GST_IS_PAD (pad));
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GST_INFO_OBJECT(pad, "Pausing");
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gst_pad_push_event (pad, gst_event_new_gap (audio_pad->buffer_time, GST_CLOCK_TIME_NONE));
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audio_pad->discont_pending = TRUE;
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}
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static void
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gst_wpe_src_load_bytes (GstWpeVideoSrc * src, GBytes * bytes)
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{
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GstWpeSrc *self = GST_WPE_SRC (src);
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if (self->video_src)
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g_signal_emit_by_name (self->video_src, "load-bytes", bytes, NULL);
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}
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static void
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gst_wpe_src_set_location (GstWpeSrc * src, const gchar * location)
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{
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GstPad *pad;
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GstPad *ghost_pad;
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GstProxyPad *proxy_pad;
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g_object_set (src->video_src, "location", location, NULL);
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ghost_pad = gst_element_get_static_pad (GST_ELEMENT_CAST (src), "video");
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if (GST_IS_PAD (ghost_pad)) {
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gst_object_unref (ghost_pad);
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return;
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}
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gst_bin_add (GST_BIN_CAST (src), src->video_src);
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pad = gst_element_get_static_pad (GST_ELEMENT_CAST (src->video_src), "src");
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ghost_pad = gst_ghost_pad_new_from_template ("video", pad,
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gst_static_pad_template_get (&video_src_factory));
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proxy_pad = gst_proxy_pad_get_internal (GST_PROXY_PAD (ghost_pad));
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gst_pad_set_active (GST_PAD_CAST (proxy_pad), TRUE);
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gst_element_add_pad (GST_ELEMENT_CAST (src), GST_PAD_CAST (ghost_pad));
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gst_flow_combiner_add_pad (src->flow_combiner, GST_PAD_CAST (ghost_pad));
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gst_pad_set_chain_function (GST_PAD_CAST (proxy_pad), gst_wpe_src_chain_buffer);
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gst_object_unref (proxy_pad);
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gst_object_unref (pad);
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}
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static void
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gst_wpe_src_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec)
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{
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GstWpeSrc *self = GST_WPE_SRC (object);
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if (self->video_src)
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g_object_get_property (G_OBJECT (self->video_src), pspec->name, value);
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}
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static void
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gst_wpe_src_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec)
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{
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GstWpeSrc *self = GST_WPE_SRC (object);
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if (self->video_src) {
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if (prop_id == PROP_LOCATION)
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gst_wpe_src_set_location (self, g_value_get_string (value));
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else
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g_object_set_property (G_OBJECT (self->video_src), pspec->name, value);
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}
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}
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static GstURIType
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gst_wpe_src_uri_get_type (GType)
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{
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return GST_URI_SRC;
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}
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static const gchar *const *
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gst_wpe_src_get_protocols (GType)
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{
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static const char *protocols[] = { "wpe", NULL };
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return protocols;
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}
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static gchar *
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gst_wpe_src_get_uri (GstURIHandler * handler)
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{
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GstWpeSrc *src = GST_WPE_SRC (handler);
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gchar *location;
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gchar *res;
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g_object_get (src->video_src, "location", &location, NULL);
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res = g_strdup_printf ("wpe://%s", location);
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g_free (location);
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return res;
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}
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static gboolean
|
|
gst_wpe_src_set_uri (GstURIHandler * handler, const gchar * uri,
|
|
GError ** error)
|
|
{
|
|
GstWpeSrc *src = GST_WPE_SRC (handler);
|
|
|
|
gst_wpe_src_set_location(src, uri + 6);
|
|
return TRUE;
|
|
}
|
|
|
|
static void
|
|
gst_wpe_src_uri_handler_init (gpointer iface_ptr, gpointer data)
|
|
{
|
|
GstURIHandlerInterface *iface = (GstURIHandlerInterface *) iface_ptr;
|
|
|
|
iface->get_type = gst_wpe_src_uri_get_type;
|
|
iface->get_protocols = gst_wpe_src_get_protocols;
|
|
iface->get_uri = gst_wpe_src_get_uri;
|
|
iface->set_uri = gst_wpe_src_set_uri;
|
|
}
|
|
|
|
static void
|
|
gst_wpe_src_init (GstWpeSrc * src)
|
|
{
|
|
gst_bin_set_suppressed_flags (GST_BIN_CAST (src),
|
|
static_cast<GstElementFlags>(GST_ELEMENT_FLAG_SOURCE | GST_ELEMENT_FLAG_SINK));
|
|
GST_OBJECT_FLAG_SET (src, GST_ELEMENT_FLAG_SOURCE);
|
|
|
|
src->fd_allocator = gst_fd_allocator_new ();
|
|
src->audio_src_pads = g_hash_table_new (g_direct_hash, g_direct_equal);
|
|
src->flow_combiner = gst_flow_combiner_new ();
|
|
src->video_src = gst_element_factory_make ("wpevideosrc", NULL);
|
|
}
|
|
|
|
static gboolean
|
|
gst_wpe_audio_remove_audio_pad (gint32 *id, GstPad *pad, GstWpeSrc *self)
|
|
{
|
|
gst_wpe_src_remove_audio_pad (self, pad);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static GstStateChangeReturn
|
|
gst_wpe_src_change_state (GstElement * element, GstStateChange transition)
|
|
{
|
|
GstStateChangeReturn result;
|
|
GstWpeSrc *src = GST_WPE_SRC (element);
|
|
|
|
GST_DEBUG_OBJECT (src, "%s", gst_state_change_get_name (transition));
|
|
result = GST_CALL_PARENT_WITH_DEFAULT (GST_ELEMENT_CLASS , change_state, (element, transition), GST_STATE_CHANGE_FAILURE);
|
|
|
|
switch (transition) {
|
|
case GST_STATE_CHANGE_PAUSED_TO_READY:{
|
|
g_hash_table_foreach_remove (src->audio_src_pads, (GHRFunc) gst_wpe_audio_remove_audio_pad, src);
|
|
gst_flow_combiner_reset (src->flow_combiner);
|
|
break;
|
|
}
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
static void
|
|
gst_wpe_src_dispose (GObject *object)
|
|
{
|
|
GstWpeSrc *src = GST_WPE_SRC (object);
|
|
|
|
g_hash_table_unref (src->audio_src_pads);
|
|
gst_flow_combiner_free (src->flow_combiner);
|
|
gst_object_unref (src->fd_allocator);
|
|
|
|
GST_CALL_PARENT (G_OBJECT_CLASS, dispose, (object));
|
|
}
|
|
|
|
static void
|
|
gst_wpe_src_class_init (GstWpeSrcClass * klass)
|
|
{
|
|
GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
|
|
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
|
|
|
|
gobject_class->set_property = gst_wpe_src_set_property;
|
|
gobject_class->get_property = gst_wpe_src_get_property;
|
|
gobject_class->dispose = gst_wpe_src_dispose;
|
|
|
|
g_object_class_install_property (gobject_class, PROP_LOCATION,
|
|
g_param_spec_string ("location", "location", "The URL to display", "",
|
|
(GParamFlags) (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)));
|
|
g_object_class_install_property (gobject_class, PROP_DRAW_BACKGROUND,
|
|
g_param_spec_boolean ("draw-background", "Draws the background",
|
|
"Whether to draw the WebView background", TRUE,
|
|
(GParamFlags) (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)));
|
|
|
|
gst_element_class_set_static_metadata (element_class, "WPE source",
|
|
"Source/Video/Audio", "Creates Audio/Video streams from a web"
|
|
" page using WPE web engine",
|
|
"Philippe Normand <philn@igalia.com>, Žan Doberšek "
|
|
"<zdobersek@igalia.com>");
|
|
|
|
/**
|
|
* GstWpeSrc::load-bytes:
|
|
* @src: the object which received the signal
|
|
* @bytes: the GBytes data to load
|
|
*
|
|
* Load the specified bytes into the internal webView.
|
|
*/
|
|
gst_wpe_video_src_signals[SIGNAL_LOAD_BYTES] =
|
|
g_signal_new_class_handler ("load-bytes", G_TYPE_FROM_CLASS (klass),
|
|
static_cast < GSignalFlags > (G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION),
|
|
G_CALLBACK (gst_wpe_src_load_bytes), NULL, NULL, NULL, G_TYPE_NONE, 1,
|
|
G_TYPE_BYTES);
|
|
|
|
element_class->change_state = GST_DEBUG_FUNCPTR (gst_wpe_src_change_state);
|
|
|
|
gst_element_class_add_static_pad_template (element_class, &video_src_factory);
|
|
gst_element_class_add_static_pad_template (element_class, &audio_src_factory);
|
|
}
|