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0c22e1b954
Canonicalize property names as needed.
256 lines
7.6 KiB
C
256 lines
7.6 KiB
C
/* GStreamer
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* Copyright (C) <2008> Thijs Vermeir <thijsvermeir@gmail.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., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "string.h"
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#include "gstsrtenc.h"
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#include <gst/controller/gstcontroller.h>
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GST_DEBUG_CATEGORY_STATIC (srtenc_debug);
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#define GST_CAT_DEFAULT srtenc_debug
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enum
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{
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ARG_0,
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ARG_TIMESTAMP,
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ARG_DURATION
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};
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static GstStaticPadTemplate src_template = GST_STATIC_PAD_TEMPLATE ("src",
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GST_PAD_SRC,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS ("application/x-subtitle"));
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static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink",
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GST_PAD_SINK,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS ("text/plain; text/x-pango-markup"));
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static GstFlowReturn gst_srt_enc_chain (GstPad * pad, GstBuffer * buf);
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static gboolean plugin_init (GstPlugin * plugin);
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static gchar *gst_srt_enc_timeconvertion (GstSrtEnc * srtenc, GstBuffer * buf);
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static gchar *gst_srt_enc_timestamp_to_string (GstClockTime timestamp);
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static void gst_srt_enc_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec);
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static void gst_srt_enc_reset (GstSrtEnc * srtenc);
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static void gst_srt_enc_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec);
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GST_BOILERPLATE (GstSrtEnc, gst_srt_enc, GstElement, GST_TYPE_ELEMENT);
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static gchar *
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gst_srt_enc_timestamp_to_string (GstClockTime timestamp)
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{
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guint h, m, s, ms;
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h = timestamp / (3600 * GST_SECOND);
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timestamp -= h * 3600 * GST_SECOND;
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m = timestamp / (60 * GST_SECOND);
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timestamp -= m * 60 * GST_SECOND;
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s = timestamp / GST_SECOND;
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timestamp -= s * GST_SECOND;
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ms = timestamp / GST_MSECOND;
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return g_strdup_printf ("%.2d:%.2d:%.2d,%.3d", h, m, s, ms);
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}
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static gchar *
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gst_srt_enc_timeconvertion (GstSrtEnc * srtenc, GstBuffer * buf)
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{
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gchar *start_time =
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gst_srt_enc_timestamp_to_string (GST_BUFFER_TIMESTAMP (buf) +
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srtenc->timestamp);
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gchar *stop_time =
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gst_srt_enc_timestamp_to_string (GST_BUFFER_TIMESTAMP (buf) +
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srtenc->timestamp + GST_BUFFER_DURATION (buf) + srtenc->duration);
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gchar *string = g_strdup_printf ("%s --> %s\n", start_time, stop_time);
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g_free (start_time);
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g_free (stop_time);
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return string;
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}
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static GstFlowReturn
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gst_srt_enc_chain (GstPad * pad, GstBuffer * buf)
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{
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GstSrtEnc *srtenc;
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GstBuffer *new_buffer;
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gchar *timing;
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gchar *string;
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srtenc = GST_SRT_ENC (gst_pad_get_parent_element (pad));
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gst_object_sync_values (G_OBJECT (srtenc), GST_BUFFER_TIMESTAMP (buf));
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timing = gst_srt_enc_timeconvertion (srtenc, buf);
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string = g_strdup_printf ("%d\n%s", srtenc->counter++, timing);
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g_free (timing);
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new_buffer =
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gst_buffer_new_and_alloc (strlen (string) + GST_BUFFER_SIZE (buf) + 2);
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memcpy (GST_BUFFER_DATA (new_buffer), string, strlen (string));
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memcpy (GST_BUFFER_DATA (new_buffer) + strlen (string), GST_BUFFER_DATA (buf),
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GST_BUFFER_SIZE (buf));
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memcpy (GST_BUFFER_DATA (new_buffer) + GST_BUFFER_SIZE (new_buffer) - 2,
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"\n\n", 2);
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g_free (string);
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gst_buffer_unref (buf);
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return gst_pad_push (srtenc->srcpad, new_buffer);
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}
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static void
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gst_srt_enc_base_init (gpointer klass)
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{
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GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
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gst_element_class_add_pad_template (element_class,
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gst_static_pad_template_get (&sink_template));
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gst_element_class_add_pad_template (element_class,
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gst_static_pad_template_get (&src_template));
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gst_element_class_set_details_simple (element_class,
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"Srt encoder", "Codec/Encoder/Subtitle",
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"Srt subtitle encoder", "Thijs Vermeir <thijsvermeir@gmail.com>");
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}
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static void
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gst_srt_enc_reset (GstSrtEnc * srtenc)
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{
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srtenc->counter = 1;
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}
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static GstStateChangeReturn
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gst_srt_enc_change_state (GstElement * element, GstStateChange transition)
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{
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GstStateChangeReturn ret;
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GstSrtEnc *srtenc = GST_SRT_ENC (element);
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ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
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if (ret == GST_STATE_CHANGE_FAILURE)
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return ret;
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switch (transition) {
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case GST_STATE_CHANGE_PAUSED_TO_READY:
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gst_srt_enc_reset (srtenc);
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break;
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default:
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break;
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}
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return ret;
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}
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static void
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gst_srt_enc_get_property (GObject * object,
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guint prop_id, GValue * value, GParamSpec * pspec)
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{
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GstSrtEnc *srtenc;
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srtenc = GST_SRT_ENC (object);
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switch (prop_id) {
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case ARG_TIMESTAMP:
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g_value_set_int64 (value, srtenc->timestamp);
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break;
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case ARG_DURATION:
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g_value_set_int64 (value, srtenc->duration);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static void
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gst_srt_enc_set_property (GObject * object,
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guint prop_id, const GValue * value, GParamSpec * pspec)
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{
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GstSrtEnc *srtenc;
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srtenc = GST_SRT_ENC (object);
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switch (prop_id) {
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case ARG_TIMESTAMP:
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srtenc->timestamp = g_value_get_int64 (value);
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break;
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case ARG_DURATION:
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srtenc->duration = g_value_get_int64 (value);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static void
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gst_srt_enc_class_init (GstSrtEncClass * klass)
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{
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GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
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GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
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gobject_class->set_property = GST_DEBUG_FUNCPTR (gst_srt_enc_set_property);
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gobject_class->get_property = GST_DEBUG_FUNCPTR (gst_srt_enc_get_property);
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element_class->change_state = GST_DEBUG_FUNCPTR (gst_srt_enc_change_state);
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g_object_class_install_property (gobject_class, ARG_TIMESTAMP,
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g_param_spec_int64 ("timestamp", "Offset for the starttime",
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"Offset for the starttime for the subtitles", G_MININT64, G_MAXINT64,
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0,
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G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS));
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g_object_class_install_property (gobject_class, ARG_DURATION,
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g_param_spec_int64 ("duration", "Offset for the duration",
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"Offset for the duration of the subtitles", G_MININT64, G_MAXINT64,
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0,
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G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS));
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GST_DEBUG_CATEGORY_INIT (srtenc_debug, "srtenc", 0,
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"SubRip subtitle encoder");
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}
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static void
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gst_srt_enc_init (GstSrtEnc * srtenc, GstSrtEncClass * klass)
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{
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gst_srt_enc_reset (srtenc);
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srtenc->srcpad = gst_pad_new_from_static_template (&src_template, "src");
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gst_element_add_pad (GST_ELEMENT (srtenc), srtenc->srcpad);
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srtenc->sinkpad = gst_pad_new_from_static_template (&sink_template, "sink");
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gst_element_add_pad (GST_ELEMENT (srtenc), srtenc->sinkpad);
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gst_pad_set_chain_function (srtenc->sinkpad, gst_srt_enc_chain);
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}
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static gboolean
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plugin_init (GstPlugin * plugin)
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{
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return gst_element_register (plugin, "srtenc", GST_RANK_NONE,
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GST_TYPE_SRT_ENC);
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}
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GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
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GST_VERSION_MINOR,
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"subenc",
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"subtitle encoders",
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plugin_init, VERSION, GST_LICENSE, GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)
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