/* GStreamer * Copyright (C) <2008> Thijs Vermeir <thijsvermeir@gmail.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., 59 Temple Place - Suite 330, * Boston, MA 02111-1307, USA. */ #ifdef HAVE_CONFIG_H #include "config.h" #endif #include "string.h" #include "gstsrtenc.h" #include <gst/controller/gstcontroller.h> GST_DEBUG_CATEGORY_STATIC (srtenc_debug); #define GST_CAT_DEFAULT srtenc_debug enum { ARG_0, ARG_TIMESTAMP, ARG_DURATION }; static GstStaticPadTemplate src_template = GST_STATIC_PAD_TEMPLATE ("src", GST_PAD_SRC, GST_PAD_ALWAYS, GST_STATIC_CAPS ("application/x-subtitle")); static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink", GST_PAD_SINK, GST_PAD_ALWAYS, GST_STATIC_CAPS ("text/plain; text/x-pango-markup")); static GstFlowReturn gst_srt_enc_chain (GstPad * pad, GstBuffer * buf); static gboolean plugin_init (GstPlugin * plugin); static gchar *gst_srt_enc_timeconvertion (GstSrtEnc * srtenc, GstBuffer * buf); static gchar *gst_srt_enc_timestamp_to_string (GstClockTime timestamp); static void gst_srt_enc_base_init (gpointer klass); static void gst_srt_enc_class_init (GstSrtEncClass * klass); static void gst_srt_enc_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec); static void gst_srt_enc_init (GstSrtEnc * src, GstSrtEncClass * klass); static void gst_srt_enc_reset (GstSrtEnc * srtenc); static void gst_srt_enc_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec); GST_BOILERPLATE (GstSrtEnc, gst_srt_enc, GstElement, GST_TYPE_ELEMENT); static gchar * gst_srt_enc_timestamp_to_string (GstClockTime timestamp) { guint h, m, s, ms; h = timestamp / (3600 * GST_SECOND); timestamp -= h * 3600 * GST_SECOND; m = timestamp / (60 * GST_SECOND); timestamp -= m * 60 * GST_SECOND; s = timestamp / GST_SECOND; timestamp -= s * GST_SECOND; ms = timestamp / GST_MSECOND; return g_strdup_printf ("%.2d:%.2d:%.2d,%.3d", h, m, s, ms); } static gchar * gst_srt_enc_timeconvertion (GstSrtEnc * srtenc, GstBuffer * buf) { gchar *start_time = gst_srt_enc_timestamp_to_string (GST_BUFFER_TIMESTAMP (buf) + srtenc->timestamp); gchar *stop_time = gst_srt_enc_timestamp_to_string (GST_BUFFER_TIMESTAMP (buf) + srtenc->timestamp + GST_BUFFER_DURATION (buf) + srtenc->duration); gchar *string = g_strdup_printf ("%s --> %s\n", start_time, stop_time); g_free (start_time); g_free (stop_time); return string; } static GstFlowReturn gst_srt_enc_chain (GstPad * pad, GstBuffer * buf) { GstSrtEnc *srtenc; GstBuffer *new_buffer; gchar *timing; gchar *string; srtenc = GST_SRT_ENC (gst_pad_get_parent_element (pad)); gst_object_sync_values (G_OBJECT (srtenc), GST_BUFFER_TIMESTAMP (buf)); timing = gst_srt_enc_timeconvertion (srtenc, buf); string = g_strdup_printf ("%d\n%s", srtenc->counter++, timing); g_free (timing); new_buffer = gst_buffer_new_and_alloc (strlen (string) + GST_BUFFER_SIZE (buf) + 2); memcpy (GST_BUFFER_DATA (new_buffer), string, strlen (string)); memcpy (GST_BUFFER_DATA (new_buffer) + strlen (string), GST_BUFFER_DATA (buf), GST_BUFFER_SIZE (buf)); memcpy (GST_BUFFER_DATA (new_buffer) + GST_BUFFER_SIZE (new_buffer) - 2, "\n\n", 2); g_free (string); gst_buffer_unref (buf); return gst_pad_push (srtenc->srcpad, new_buffer); } static void gst_srt_enc_base_init (gpointer klass) { GstElementClass *element_class = GST_ELEMENT_CLASS (klass); gst_element_class_add_pad_template (element_class, gst_static_pad_template_get (&sink_template)); gst_element_class_add_pad_template (element_class, gst_static_pad_template_get (&src_template)); gst_element_class_set_details_simple (element_class, "Srt encoder", "Codec/Encoder/Subtitle", "Srt subtitle encoder", "Thijs Vermeir <thijsvermeir@gmail.com>"); } static void gst_srt_enc_reset (GstSrtEnc * srtenc) { srtenc->counter = 1; } static GstStateChangeReturn gst_srt_enc_change_state (GstElement * element, GstStateChange transition) { GstStateChangeReturn ret; GstSrtEnc *srtenc = GST_SRT_ENC (element); ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition); if (ret == GST_STATE_CHANGE_FAILURE) return ret; switch (transition) { case GST_STATE_CHANGE_PAUSED_TO_READY: gst_srt_enc_reset (srtenc); break; default: break; } return ret; } static void gst_srt_enc_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec) { GstSrtEnc *srtenc; srtenc = GST_SRT_ENC (object); switch (prop_id) { case ARG_TIMESTAMP: g_value_set_int64 (value, srtenc->timestamp); break; case ARG_DURATION: g_value_set_int64 (value, srtenc->duration); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static void gst_srt_enc_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec) { GstSrtEnc *srtenc; srtenc = GST_SRT_ENC (object); switch (prop_id) { case ARG_TIMESTAMP: srtenc->timestamp = g_value_get_int64 (value); break; case ARG_DURATION: srtenc->duration = g_value_get_int64 (value); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static void gst_srt_enc_class_init (GstSrtEncClass * klass) { GObjectClass *gobject_class = G_OBJECT_CLASS (klass); GstElementClass *element_class = GST_ELEMENT_CLASS (klass); gobject_class->set_property = GST_DEBUG_FUNCPTR (gst_srt_enc_set_property); gobject_class->get_property = GST_DEBUG_FUNCPTR (gst_srt_enc_get_property); element_class->change_state = GST_DEBUG_FUNCPTR (gst_srt_enc_change_state); g_object_class_install_property (gobject_class, ARG_TIMESTAMP, g_param_spec_int64 ("timestamp", "Offset for the starttime", "Offset for the starttime for the subtitles", G_MININT64, G_MAXINT64, 0, G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE)); g_object_class_install_property (gobject_class, ARG_DURATION, g_param_spec_int64 ("duration", "Offset for the duration", "Offset for the duration of the subtitles", G_MININT64, G_MAXINT64, 0, G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE)); GST_DEBUG_CATEGORY_INIT (srtenc_debug, "srtenc", 0, "SubRip subtitle encoder"); } static void gst_srt_enc_init (GstSrtEnc * srtenc, GstSrtEncClass * klass) { gst_srt_enc_reset (srtenc); srtenc->srcpad = gst_pad_new_from_static_template (&src_template, "src"); gst_element_add_pad (GST_ELEMENT (srtenc), srtenc->srcpad); srtenc->sinkpad = gst_pad_new_from_static_template (&sink_template, "sink"); gst_element_add_pad (GST_ELEMENT (srtenc), srtenc->sinkpad); gst_pad_set_chain_function (srtenc->sinkpad, gst_srt_enc_chain); } static gboolean plugin_init (GstPlugin * plugin) { return gst_element_register (plugin, "srtenc", GST_RANK_NONE, GST_TYPE_SRT_ENC); } GST_PLUGIN_DEFINE (GST_VERSION_MAJOR, GST_VERSION_MINOR, "subenc", "subtitle encoders", plugin_init, VERSION, GST_LICENSE, GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)