1 /* |
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2 * Copyright © 2010 Nokia Corporation. |
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3 * This material, including documentation and any related |
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4 * computer progrs, is protected by copyright controlled by |
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5 * Nokia Corporation. All rights are reserved. Copying, |
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6 * including reproducing, storing, adapting or translating, any |
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7 * or all of this material requires the prior written consent of |
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8 * Nokia Corporation. This material also contains confidential |
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9 * information which may not be disclosed to others without the |
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10 * prior written consent of Nokia Corporation. |
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11 * ============================================================================ |
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12 */ |
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13 |
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14 |
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15 #ifdef HAVE_CONFIG_H |
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16 #include "config.h" |
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17 #endif |
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18 |
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19 |
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20 #include "gstamrmux.h" |
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21 |
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22 #include <stdlib.h> |
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23 #include <string.h> |
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24 |
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25 |
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26 #ifdef __SYMBIAN32__ |
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27 #include <gst/gstinfo.h> |
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28 #endif |
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29 |
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30 /* AMR nb header value */ |
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31 const char* amrnbmagicnumber = "#!AMR\n"; |
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32 |
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33 static void gst_amrmux_base_init (gpointer g_class); |
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34 static void gst_amrmux_class_init (GstAmrMuxClass * klass); |
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35 static void gst_amrmux_init ( GstAmrMux * filter, GstAmrMuxClass *filter_klass); |
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36 |
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37 static GstFlowReturn gst_amrmux_chain (GstPad * pad, GstBuffer * buf); |
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38 |
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39 static void gst_amrmux_get_property (GObject * object, guint prop_id, |
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40 GValue * value, GParamSpec * pspec); |
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41 |
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42 static void gst_amrmux_set_property (GObject *object, guint prop_id, |
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43 const GValue *value, GParamSpec *pspec); |
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44 |
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45 static GstStateChangeReturn gst_amrmux_change_state (GstElement * element, |
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46 GstStateChange transition); |
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47 |
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48 static void gst_amrmux_dispose(GObject * object); |
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49 |
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50 static GstElementClass *parent_class= NULL; |
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51 |
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52 static const GstElementDetails gst_amrmux_details = |
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53 GST_ELEMENT_DETAILS ("AMR MUX Details", |
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54 "Codec/Muxer/Audio", |
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55 "Adaptive Multi-Rate Narrow-Band Muxer", |
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56 ""); |
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57 |
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58 static GstStaticPadTemplate sink_factory = |
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59 GST_STATIC_PAD_TEMPLATE ( |
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60 "sink", |
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61 GST_PAD_SINK, |
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62 GST_PAD_ALWAYS, |
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63 GST_STATIC_CAPS ("audio/amr") |
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64 ); |
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65 |
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66 static GstStaticPadTemplate source_factory = |
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67 GST_STATIC_PAD_TEMPLATE ( |
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68 "src", |
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69 GST_PAD_SRC, |
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70 GST_PAD_ALWAYS, |
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71 GST_STATIC_CAPS ("audio/amr") |
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72 ); |
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73 |
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74 enum { |
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75 ARG_0, |
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76 ARG_HEADER |
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77 }; |
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78 |
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79 |
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80 GType |
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81 gst_amrmux_get_type (void) |
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82 { |
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83 static GType gst_amrmux_type = 0; |
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84 |
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85 if (!gst_amrmux_type) { |
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86 static const GTypeInfo amrmux_info = { |
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87 sizeof (GstAmrMuxClass), |
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88 gst_amrmux_base_init, |
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89 NULL, |
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90 (GClassInitFunc) gst_amrmux_class_init, |
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91 NULL, |
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92 NULL, |
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93 sizeof (GstAmrMux), |
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94 0, |
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95 (GInstanceInitFunc) gst_amrmux_init, |
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96 }; |
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97 |
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98 gst_amrmux_type = |
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99 g_type_register_static (GST_TYPE_ELEMENT, "GstAmrMux", |
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100 &amrmux_info, (GTypeFlags)0); |
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101 } |
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102 return gst_amrmux_type; |
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103 } |
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104 |
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105 |
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106 static void |
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107 gst_amrmux_base_init (gpointer g_class) |
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108 { |
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109 GstElementClass *element_class = GST_ELEMENT_CLASS (g_class); |
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110 |
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111 gst_element_class_add_pad_template(element_class, |
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112 gst_static_pad_template_get(&sink_factory)); |
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113 |
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114 gst_element_class_add_pad_template(element_class, |
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115 gst_static_pad_template_get(&source_factory)); |
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116 |
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117 gst_element_class_set_details (element_class, &gst_amrmux_details); |
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118 } |
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119 |
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120 static void |
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121 gst_amrmux_class_init ( GstAmrMuxClass * klass ) |
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122 { |
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123 GObjectClass *object_class; |
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124 GstElementClass *gstelement_class; |
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125 |
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126 gstelement_class = (GstElementClass *) klass; |
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127 object_class = (GObjectClass *) klass; |
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128 |
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129 |
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130 object_class->set_property = gst_amrmux_set_property; |
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131 object_class->get_property = gst_amrmux_get_property; |
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132 |
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133 gstelement_class->change_state = gst_amrmux_change_state; |
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134 |
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135 object_class->dispose = gst_amrmux_dispose; |
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136 |
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137 parent_class = g_type_class_peek_parent(klass); |
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138 |
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139 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_HEADER, |
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140 g_param_spec_boolean ("header", "header", |
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141 "For writing AMR header", TRUE, (GParamFlags)G_PARAM_READWRITE)); |
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142 |
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143 |
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144 } |
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145 |
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146 static void gst_amrmux_dispose(GObject * object) |
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147 { |
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148 G_OBJECT_CLASS (parent_class)->dispose (object); |
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149 } |
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150 |
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151 static void |
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152 gst_amrmux_init( GstAmrMux * amrmux, GstAmrMuxClass *amrmux_klass) |
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153 { |
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154 GstElementClass *klass = GST_ELEMENT_CLASS (amrmux_klass); |
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155 |
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156 //By default we have to write header |
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157 amrmux->writeheader= TRUE; |
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158 |
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159 //Add Sink pad to this element |
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160 |
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161 amrmux->sinkpad = gst_pad_new_from_template ( |
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162 gst_element_class_get_pad_template (klass, "sink"), "sink"); |
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163 |
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164 gst_element_add_pad (GST_ELEMENT (amrmux), amrmux->sinkpad); |
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165 |
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166 |
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167 //Add Src pad to this element |
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168 amrmux->srcpad = gst_pad_new_from_template ( |
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169 gst_element_class_get_pad_template (klass, "src"), "src"); |
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170 |
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171 gst_element_add_pad (GST_ELEMENT (amrmux), amrmux->srcpad); |
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172 |
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173 gst_pad_set_chain_function (amrmux->sinkpad, gst_amrmux_chain); |
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174 |
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175 } |
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176 |
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177 |
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178 static void |
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179 gst_amrmux_get_property (GObject * object, |
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180 guint prop_id, GValue * value, GParamSpec * pspec) |
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181 { |
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182 |
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183 GstAmrMux *amrmux = GST_AMRMUX( object ); |
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184 |
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185 switch (prop_id) { |
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186 case ARG_HEADER: |
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187 g_value_set_boolean (value, amrmux->writeheader); |
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188 break; |
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189 |
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190 default: |
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191 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); |
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192 break; |
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193 } |
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194 } |
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195 |
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196 |
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197 static void |
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198 gst_amrmux_set_property (GObject * object, |
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199 guint prop_id, const GValue * value, GParamSpec * pspec) |
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200 { |
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201 GstAmrMux *amrmux = GST_AMRMUX( object ); |
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202 |
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203 switch (prop_id) { |
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204 case ARG_HEADER: |
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205 amrmux->writeheader = g_value_get_boolean (value); |
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206 break; |
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207 default: |
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208 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); |
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209 break; |
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210 } |
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211 } |
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212 |
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213 |
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214 |
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215 static GstFlowReturn |
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216 gst_amrmux_chain (GstPad * pad, GstBuffer * buf) |
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217 { |
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218 |
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219 gint8 *codecdata; |
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220 guint8* amrdata; |
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221 guint8* amrheaderstart; |
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222 |
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223 int codecdatasize = GST_BUFFER_SIZE(buf); |
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224 |
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225 int magicnumberlength = strlen( amrnbmagicnumber ); |
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226 |
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227 GstAmrMux *amrmux = GST_AMRMUX (GST_PAD_PARENT (pad)); |
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228 |
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229 if ( amrmux->writeheader ) |
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230 { |
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231 |
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232 buf = gst_buffer_make_writable( buf ); |
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233 |
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234 //Allocate a buffer which will hold codec data + magic number |
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235 |
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236 amrdata = ( guint8* )g_malloc( GST_BUFFER_SIZE(buf) + magicnumberlength ); |
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237 |
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238 //To save the starting address of amr data |
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239 |
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240 amrheaderstart = amrdata; |
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241 |
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242 //Copy magic number to newly allocated buffer |
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243 |
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244 memcpy( amrdata, amrnbmagicnumber, magicnumberlength); |
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245 |
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246 codecdata = (gint8*)GST_BUFFER_DATA (buf); |
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247 |
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248 //Move the pointer to the end of magic number |
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249 |
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250 amrdata += magicnumberlength; |
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251 |
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252 //Copy codec data to newly allocated buffer |
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253 |
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254 memcpy( amrdata , codecdata, codecdatasize ); |
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255 |
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256 // free codec data from GstBuffer |
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257 |
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258 g_free( buf->malloc_data ); |
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259 |
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260 //Copying the newly allocated buffer and size in GstBuffer |
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261 |
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262 buf->data = amrheaderstart; |
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263 |
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264 buf->malloc_data = amrheaderstart; |
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265 |
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266 buf->size+= magicnumberlength; |
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267 |
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268 //Do it only first time |
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269 |
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270 amrmux->writeheader = FALSE; |
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271 } |
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272 |
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273 return gst_pad_push( amrmux->srcpad , buf ); |
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274 |
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275 } |
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276 |
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277 static GstStateChangeReturn |
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278 gst_amrmux_change_state (GstElement * element, GstStateChange transition) |
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279 { |
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280 GstStateChangeReturn ret; |
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281 GstAmrMux *amrmux = GST_AMRMUX (element); |
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282 |
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283 ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition); |
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284 |
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285 if (G_UNLIKELY (ret == GST_STATE_CHANGE_FAILURE)) |
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286 return ret; |
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287 |
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288 switch (transition) { |
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289 case GST_STATE_CHANGE_READY_TO_NULL: |
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290 { |
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291 amrmux->writeheader = TRUE; |
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292 break; |
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293 } |
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294 |
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295 default: |
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296 break; |
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297 } |
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298 |
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299 return ret; |
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300 } |
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301 |
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302 static gboolean |
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303 plugin_init (GstPlugin * plugin) |
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304 { |
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305 |
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306 return gst_element_register (plugin, "amrmux", GST_RANK_PRIMARY, |
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307 GST_TYPE_AMRMUX); |
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308 } |
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309 |
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310 GST_PLUGIN_DEFINE (GST_VERSION_MAJOR, |
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311 GST_VERSION_MINOR, |
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312 "amrmux", |
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313 "Add header to amr-nb encoded stream", |
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314 plugin_init, VERSION, GST_LICENSE, GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN) |
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315 |
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316 |
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317 EXPORT_C GstPluginDesc* _GST_PLUGIN_DESC() |
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318 { |
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319 return &gst_plugin_desc; |
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320 } |
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321 |
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