| /* GStreamer |
| * Copyright (C) 2011 David Schleef <ds@entropywave.com> |
| * |
| * 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., 51 Franklin Street, Suite 500, |
| * Boston, MA 02110-1335, USA. |
| */ |
| /** |
| * SECTION:element-gstintersubsrc |
| * |
| * The intersubsrc element is a subtitle source element. It is used |
| * in connection with a intersubsink element in a different pipeline, |
| * similar to interaudiosink and interaudiosrc. |
| * |
| * <refsect2> |
| * <title>Example launch line</title> |
| * |[ |
| * gst-launch-1.0 -v intersubsrc ! kateenc ! oggmux ! filesink location=out.ogv |
| * ]| |
| * |
| * The intersubsrc element cannot be used effectively with gst-launch-1.0, |
| * as it requires a second pipeline in the application to send subtitles. |
| * See the gstintertest.c example in the gst-plugins-bad source code for |
| * more details. |
| * </refsect2> |
| */ |
| |
| #ifdef HAVE_CONFIG_H |
| #include "config.h" |
| #endif |
| |
| #include <gst/gst.h> |
| #include <gst/base/gstbasesrc.h> |
| #include "gstintersubsrc.h" |
| |
| GST_DEBUG_CATEGORY_STATIC (gst_inter_sub_src_debug_category); |
| #define GST_CAT_DEFAULT gst_inter_sub_src_debug_category |
| |
| /* prototypes */ |
| static void gst_inter_sub_src_set_property (GObject * object, |
| guint property_id, const GValue * value, GParamSpec * pspec); |
| static void gst_inter_sub_src_get_property (GObject * object, |
| guint property_id, GValue * value, GParamSpec * pspec); |
| static void gst_inter_sub_src_finalize (GObject * object); |
| |
| static gboolean gst_inter_sub_src_start (GstBaseSrc * src); |
| static gboolean gst_inter_sub_src_stop (GstBaseSrc * src); |
| static void |
| gst_inter_sub_src_get_times (GstBaseSrc * src, GstBuffer * buffer, |
| GstClockTime * start, GstClockTime * end); |
| static GstFlowReturn |
| gst_inter_sub_src_create (GstBaseSrc * src, guint64 offset, guint size, |
| GstBuffer ** buf); |
| |
| enum |
| { |
| PROP_0, |
| PROP_CHANNEL |
| }; |
| |
| #define DEFAULT_CHANNEL ("default") |
| |
| /* pad templates */ |
| static GstStaticPadTemplate gst_inter_sub_src_src_template = |
| GST_STATIC_PAD_TEMPLATE ("src", |
| GST_PAD_SRC, |
| GST_PAD_ALWAYS, |
| GST_STATIC_CAPS ("application/unknown") |
| ); |
| |
| /* class initialization */ |
| #define parent_class gst_inter_sub_src_parent_class |
| G_DEFINE_TYPE (GstInterSubSrc, gst_inter_sub_src, GST_TYPE_BASE_SRC); |
| |
| static void |
| gst_inter_sub_src_class_init (GstInterSubSrcClass * klass) |
| { |
| GObjectClass *gobject_class = G_OBJECT_CLASS (klass); |
| GstElementClass *element_class = GST_ELEMENT_CLASS (klass); |
| GstBaseSrcClass *base_src_class = GST_BASE_SRC_CLASS (klass); |
| |
| GST_DEBUG_CATEGORY_INIT (gst_inter_sub_src_debug_category, "intersubsrc", 0, |
| "debug category for intersubsrc element"); |
| |
| gst_element_class_add_static_pad_template (element_class, |
| &gst_inter_sub_src_src_template); |
| |
| gst_element_class_set_static_metadata (element_class, |
| "Internal subtitle source", |
| "Source/Subtitle", |
| "Virtual subtitle source for internal process communication", |
| "David Schleef <ds@schleef.org>"); |
| |
| gobject_class->set_property = gst_inter_sub_src_set_property; |
| gobject_class->get_property = gst_inter_sub_src_get_property; |
| gobject_class->finalize = gst_inter_sub_src_finalize; |
| base_src_class->start = GST_DEBUG_FUNCPTR (gst_inter_sub_src_start); |
| base_src_class->stop = GST_DEBUG_FUNCPTR (gst_inter_sub_src_stop); |
| base_src_class->get_times = GST_DEBUG_FUNCPTR (gst_inter_sub_src_get_times); |
| base_src_class->create = GST_DEBUG_FUNCPTR (gst_inter_sub_src_create); |
| |
| g_object_class_install_property (gobject_class, PROP_CHANNEL, |
| g_param_spec_string ("channel", "Channel", |
| "Channel name to match inter src and sink elements", |
| DEFAULT_CHANNEL, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); |
| } |
| |
| static void |
| gst_inter_sub_src_init (GstInterSubSrc * intersubsrc) |
| { |
| gst_base_src_set_format (GST_BASE_SRC (intersubsrc), GST_FORMAT_TIME); |
| gst_base_src_set_live (GST_BASE_SRC (intersubsrc), TRUE); |
| |
| intersubsrc->channel = g_strdup (DEFAULT_CHANNEL); |
| } |
| |
| void |
| gst_inter_sub_src_set_property (GObject * object, guint property_id, |
| const GValue * value, GParamSpec * pspec) |
| { |
| GstInterSubSrc *intersubsrc = GST_INTER_SUB_SRC (object); |
| |
| switch (property_id) { |
| case PROP_CHANNEL: |
| g_free (intersubsrc->channel); |
| intersubsrc->channel = g_value_dup_string (value); |
| break; |
| default: |
| G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec); |
| break; |
| } |
| } |
| |
| void |
| gst_inter_sub_src_get_property (GObject * object, guint property_id, |
| GValue * value, GParamSpec * pspec) |
| { |
| GstInterSubSrc *intersubsrc = GST_INTER_SUB_SRC (object); |
| |
| switch (property_id) { |
| case PROP_CHANNEL: |
| g_value_set_string (value, intersubsrc->channel); |
| break; |
| default: |
| G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec); |
| break; |
| } |
| } |
| |
| static void |
| gst_inter_sub_src_finalize (GObject * object) |
| { |
| GstInterSubSrc *intersubsrc = GST_INTER_SUB_SRC (object); |
| |
| g_free (intersubsrc->channel); |
| intersubsrc->channel = NULL; |
| |
| G_OBJECT_CLASS (parent_class)->finalize (object); |
| } |
| |
| static gboolean |
| gst_inter_sub_src_start (GstBaseSrc * src) |
| { |
| GstInterSubSrc *intersubsrc = GST_INTER_SUB_SRC (src); |
| |
| GST_DEBUG_OBJECT (intersubsrc, "start"); |
| |
| intersubsrc->surface = gst_inter_surface_get (intersubsrc->channel); |
| |
| return TRUE; |
| } |
| |
| static gboolean |
| gst_inter_sub_src_stop (GstBaseSrc * src) |
| { |
| GstInterSubSrc *intersubsrc = GST_INTER_SUB_SRC (src); |
| |
| GST_DEBUG_OBJECT (intersubsrc, "stop"); |
| |
| gst_inter_surface_unref (intersubsrc->surface); |
| intersubsrc->surface = NULL; |
| |
| return TRUE; |
| } |
| |
| static void |
| gst_inter_sub_src_get_times (GstBaseSrc * src, GstBuffer * buffer, |
| GstClockTime * start, GstClockTime * end) |
| { |
| GST_DEBUG_OBJECT (src, "get_times"); |
| |
| /* for live sources, sync on the timestamp of the buffer */ |
| if (gst_base_src_is_live (src)) { |
| GstClockTime timestamp = GST_BUFFER_TIMESTAMP (buffer); |
| |
| if (GST_CLOCK_TIME_IS_VALID (timestamp)) { |
| /* get duration to calculate end time */ |
| GstClockTime duration = GST_BUFFER_DURATION (buffer); |
| |
| if (GST_CLOCK_TIME_IS_VALID (duration)) { |
| *end = timestamp + duration; |
| } |
| *start = timestamp; |
| } |
| } else { |
| *start = -1; |
| *end = -1; |
| } |
| } |
| |
| static GstFlowReturn |
| gst_inter_sub_src_create (GstBaseSrc * src, guint64 offset, guint size, |
| GstBuffer ** buf) |
| { |
| GstInterSubSrc *intersubsrc = GST_INTER_SUB_SRC (src); |
| GstBuffer *buffer; |
| |
| GST_DEBUG_OBJECT (intersubsrc, "create"); |
| |
| buffer = NULL; |
| |
| g_mutex_lock (&intersubsrc->surface->mutex); |
| if (intersubsrc->surface->sub_buffer) { |
| buffer = gst_buffer_ref (intersubsrc->surface->sub_buffer); |
| //intersubsrc->surface->sub_buffer_count++; |
| //if (intersubsrc->surface->sub_buffer_count >= 30) { |
| gst_buffer_unref (intersubsrc->surface->sub_buffer); |
| intersubsrc->surface->sub_buffer = NULL; |
| //} |
| } |
| g_mutex_unlock (&intersubsrc->surface->mutex); |
| |
| if (buffer == NULL) { |
| GstMapInfo map; |
| |
| buffer = gst_buffer_new_and_alloc (1); |
| |
| gst_buffer_map (buffer, &map, GST_MAP_WRITE); |
| map.data[0] = 0; |
| gst_buffer_unmap (buffer, &map); |
| } |
| |
| buffer = gst_buffer_make_writable (buffer); |
| |
| /* FIXME: does this make sense? Rate is always 0 */ |
| #if 0 |
| GST_BUFFER_TIMESTAMP (buffer) = |
| gst_util_uint64_scale_int (GST_SECOND, intersubsrc->n_frames, |
| intersubsrc->rate); |
| GST_DEBUG_OBJECT (intersubsrc, "create ts %" GST_TIME_FORMAT, |
| GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buffer))); |
| GST_BUFFER_DURATION (buffer) = |
| gst_util_uint64_scale_int (GST_SECOND, (intersubsrc->n_frames + 1), |
| intersubsrc->rate) - GST_BUFFER_TIMESTAMP (buffer); |
| #endif |
| GST_BUFFER_OFFSET (buffer) = intersubsrc->n_frames; |
| GST_BUFFER_OFFSET_END (buffer) = -1; |
| GST_BUFFER_FLAG_UNSET (buffer, GST_BUFFER_FLAG_DISCONT); |
| if (intersubsrc->n_frames == 0) { |
| GST_BUFFER_FLAG_SET (buffer, GST_BUFFER_FLAG_DISCONT); |
| } |
| intersubsrc->n_frames++; |
| |
| *buf = buffer; |
| |
| return GST_FLOW_OK; |
| } |