libdictix/dix-transcoder.c

   1 /**
   2  * Dictix / DixTranscoder - dix-transcoder.c
   3  *
   4  * Copyright (C) Martin Blanchard 2011 <tinram@gmx.fr>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software Foundation,
  18  * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
  19  *
  20  */
  21
  22 #ifdef HAVE_CONFIG_H
  23 #include <config.h>
  24 #endif
  25
  26 #include <stdlib.h>
  27 #include <stdio.h>
  28 #include <glib.h>
  29 #include <glib/gi18n.h>
  30 #include <gio/gio.h>
  31 #include <gst/gst.h>
  32
  33 #include "dix-transcoder.h"
  34
  35 enum {
  36         PROP_0
  37 };
  38
  39 struct _DixTranscoderPrivate
  40 {
  41         gchar *input_uri;
  42         gchar *output_uri;
  43
  44         GstBus *bus;
  45
  46         GstElement *source;
  47         GstElement *decoder;
  48         GstElement *encoder;
  49         GstElement *sink;
  50 };
  51
  52 #define DIX_TRANSCODER_GET_PRIVATE(obj) \
  53   (G_TYPE_INSTANCE_GET_PRIVATE ((obj), DIX_TYPE_TRANSCODER, DixTranscoderPrivate))
  54
  55 G_DEFINE_TYPE (DixTranscoder, dix_transcoder, GST_TYPE_PIPELINE)
  56
  57 static void     dix_transcoder_error_cb             (GstBus *bus, GstMessage *message, gpointer data);
  58 static void     dix_transcoder_element_cb           (GstBus *bus, GstMessage *message, gpointer data);
  59 static void     dix_transcoder_state_changed_cb     (GstBus *bus, GstMessage *message, gpointer data);
  60 static void     dix_transcoder_eos_cb               (GstBus *bus, GstMessage *message, gpointer data);
  61
  62 static void
  63 dix_transcoder_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec)
  64 {
  65         DixTranscoder *transcoder = (DixTranscoder *) object;
  66         DixTranscoderPrivate *priv = transcoder->priv;
  67
  68         switch (prop_id) {
  69                 default:
  70                         G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
  71         }
  72 }
  73
  74 static void
  75 dix_transcoder_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec)
  76 {
  77         DixTranscoder *transcoder = (DixTranscoder *) object;
  78         DixTranscoderPrivate *priv = transcoder->priv;
  79
  80         switch (prop_id) {
  81                 default:
  82                         G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
  83         }
  84 }
  85
  86 static void
  87 dix_transcoder_dispose (GObject *object)
  88 {
  89         DixTranscoder *transcoder = (DixTranscoder *) object;
  90         DixTranscoderPrivate *priv = transcoder->priv;
  91
  92         if (priv->bus != NULL) {
  93                 gst_object_unref (GST_OBJECT (priv->bus));
  94         }
  95         priv->bus = NULL;
  96
  97         G_OBJECT_CLASS (dix_transcoder_parent_class)->dispose (object);
  98 }
  99
 100 static void
 101 dix_transcoder_finalize (GObject *object)
 102 {
 103         DixTranscoder *transcoder = (DixTranscoder *) object;
 104         DixTranscoderPrivate *priv = transcoder->priv;
 105
 106         if (priv->input_uri != NULL) {
 107                 g_free (priv->input_uri);
 108         }
 109         priv->input_uri = NULL;
 110         if (priv->output_uri != NULL) {
 111                 g_free (priv->output_uri);
 112         }
 113         priv->output_uri = NULL;
 114
 115         G_OBJECT_CLASS (dix_transcoder_parent_class)->finalize (object);
 116 }
 117
 118 static void
 119 dix_transcoder_class_init (DixTranscoderClass* klass)
 120 {
 121         GObjectClass *gobject_class = (GObjectClass *) klass;
 122
 123         gobject_class->set_property = dix_transcoder_set_property;
 124         gobject_class->get_property = dix_transcoder_get_property;
 125         gobject_class->dispose = dix_transcoder_dispose;
 126         gobject_class->finalize = dix_transcoder_finalize;
 127
 128         g_type_class_add_private (gobject_class, sizeof (DixTranscoderPrivate));
 129 }
 130
 131 static void
 132 dix_transcoder_init (DixTranscoder* transcoder)
 133 {
 134         DixTranscoderPrivate *priv = DIX_TRANSCODER_GET_PRIVATE (transcoder);
 135         transcoder->priv = priv;
 136
 137         gst_object_set_name (GST_OBJECT(transcoder), "DictixTranscoder");
 138
 139         priv->input_uri = NULL;
 140         priv->output_uri = NULL;
 141
 142         priv->bus = NULL;
 143
 144         priv->source = NULL;
 145         priv->decoder = NULL;
 146         priv->encoder = NULL;
 147         priv->sink = NULL;
 148 }
 149
 150 DixTranscoder*
 151 dix_transcoder_new ()
 152 {
 153         return g_object_new (DIX_TYPE_TRANSCODER, NULL);
 154 }
 155
 156 void
 157 dix_transcoder_pre_load (DixTranscoder *transcoder, gchar *uri)
 158 {
 159         g_return_if_fail (DIX_IS_TRANSCODER (transcoder));
 160         g_return_if_fail (uri != NULL);
 161         DixTranscoderPrivate *priv = transcoder->priv;
 162
 163         if (g_str_has_suffix (uri, ".flac") == FALSE) {
 164                 g_warning ("Transcoder only handles FLAC audio files as input.");
 165
 166                 return;
 167         }
 168
 169         if (G_UNLIKELY (priv->bus == NULL)) {
 170                 priv->source = gst_element_factory_make ("giosrc", "DictixTranscoderSource");
 171                 priv->decoder = gst_element_factory_make ("flacdec", "DictixTranscoderDecoder");
 172                 priv->encoder = gst_element_factory_make ("encodebin", "DictixTranscoderEncoder");
 173                 priv->sink = gst_element_factory_make ("giosink", "DictixTranscoderSink");
 174
 175                 if (priv->source == NULL || priv->decoder == NULL
 176                     || priv->encoder == NULL || priv->sink == NULL) {
 177
 178                         return;
 179                 }
 180
 181                 gst_bin_add_many (GST_BIN (transcoder),
 182                                   priv->source,
 183                                   priv->decoder,
 184                                   priv->encoder,
 185                                   priv->sink,
 186                                   NULL);
 187
 188                 gst_element_link_many (priv->source,
 189                                        priv->decoder,
 190                                        priv->encoder,
 191                                        priv->sink,
 192                                        NULL);
 193
 194                 priv->bus = gst_pipeline_get_bus (GST_PIPELINE (transcoder));
 195                 gst_bus_add_signal_watch (priv->bus);
 196                 g_signal_connect (priv->bus, "message::error",
 197                                   G_CALLBACK (dix_transcoder_error_cb), transcoder);
 198                 g_signal_connect (priv->bus, "message::element",
 199                                   G_CALLBACK (dix_transcoder_element_cb), transcoder);
 200                 g_signal_connect (priv->bus, "message::state-changed",
 201                                   G_CALLBACK (dix_transcoder_state_changed_cb), transcoder);
 202                 g_signal_connect (priv->bus, "message::eos",
 203                                   G_CALLBACK (dix_transcoder_eos_cb), transcoder);
 204         }
 205
 206         g_object_set (G_OBJECT (priv->source), "location", uri, NULL);
 207 }
 208
 209 void
 210 dix_transcoder_transcode (DixTranscoder *transcoder, gchar *uri)
 211 {
 212         g_return_if_fail (DIX_IS_TRANSCODER (transcoder));
 213         g_return_if_fail (uri != NULL);
 214         DixTranscoderPrivate *priv = transcoder->priv;
 215
 216
 217 }
 218
 219 static void
 220 dix_transcoder_error_cb (GstBus *bus, GstMessage *message, gpointer data)
 221 {
 222         DixTranscoder *transcoder = (DixTranscoder *) data;
 223         DixTranscoderPrivate *priv = transcoder->priv;
 224         GError *error;
 225
 226 /*      error = g_error_new (DIX_ERROR, DIX_ERROR_GST_INTERNAL,*/
 227 /*                           _("Audio engine internal error"));*/
 228 }
 229
 230 static void
 231 dix_transcoder_element_cb (GstBus *bus, GstMessage *message, gpointer data)
 232 {
 233         DixTranscoder *transcoder = (DixTranscoder *) data;
 234         DixTranscoderPrivate *priv = transcoder->priv;
 235         const GstStructure *structure;
 236
 237         if (message->src != GST_OBJECT (priv->sink)) {
 238                 return;
 239         }
 240
 241         structure = gst_message_get_structure (message);
 242         if (gst_structure_has_name (structure, "file-exists")) {
 243                 /* File alredy exists, shoud not happened... */
 244                 gst_bus_set_flushing (priv->bus, TRUE);
 245
 246
 247
 248                 gst_bus_set_flushing (priv->bus, FALSE);
 249                 gst_element_set_state (GST_ELEMENT (transcoder), GST_STATE_PLAYING);
 250         }
 251 }
 252
 253 static void
 254 dix_transcoder_state_changed_cb (GstBus *bus, GstMessage *message, gpointer data)
 255 {
 256         DixTranscoder *transcoder = (DixTranscoder *) data;
 257         DixTranscoderPrivate *priv = transcoder->priv;
 258         GstState state, pending;
 259         GFile *file = NULL;
 260
 261         gst_message_parse_state_changed (message, NULL, &state, NULL);
 262         if (message->src != GST_OBJECT (transcoder)) {
 263                 return;
 264         }
 265
 266         switch (state) {
 267                 case GST_STATE_NULL: {
 268                         break;
 269                 } case GST_STATE_READY: {
 270                         break;
 271                 } case GST_STATE_PLAYING: {
 272                         break;
 273                 } default: {
 274                         break;
 275                 }
 276         }
 277 }
 278
 279 static void
 280 dix_transcoder_eos_cb (GstBus *bus, GstMessage *message, gpointer data)
 281 {
 282         DixTranscoder *transcoder = (DixTranscoder *) data;
 283         DixTranscoderPrivate *priv = transcoder->priv;
 284
 285         gst_element_set_state (GST_ELEMENT (transcoder), GST_STATE_NULL);
 286         gst_element_get_state (GST_ELEMENT (transcoder), NULL, NULL, GST_CLOCK_TIME_NONE);
 287 }
 288