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1 /* GStreamer |
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2 * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu> |
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3 * |
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4 * This library is free software; you can redistribute it and/or |
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5 * modify it under the terms of the GNU Library General Public |
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6 * License as published by the Free Software Foundation; either |
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7 * version 2 of the License, or (at your option) any later version. |
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8 * |
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9 * This library is distributed in the hope that it will be useful, |
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10 * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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12 * Library General Public License for more details. |
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13 * |
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14 * You should have received a copy of the GNU Library General Public |
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15 * License along with this library; if not, write to the |
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16 * Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
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17 * Boston, MA 02111-1307, USA. |
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18 */ |
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19 |
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20 |
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21 #ifdef HAVE_CONFIG_H |
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22 #include "config.h" |
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23 #endif |
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24 #include <string.h> |
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25 |
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26 #include "gstjpegenc.h" |
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27 #include <gst/video/video.h> |
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28 |
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29 /* elementfactory information */ |
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30 static const GstElementDetails gst_jpegenc_details = |
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31 GST_ELEMENT_DETAILS ("JPEG image encoder", |
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32 "Codec/Encoder/Image", |
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33 "Encode images in JPEG format", |
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34 "Wim Taymans <wim.taymans@tvd.be>"); |
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35 |
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36 GST_DEBUG_CATEGORY (jpegenc_debug); |
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37 #define GST_CAT_DEFAULT jpegenc_debug |
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38 |
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39 #define JPEG_DEFAULT_QUALITY 85 |
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40 |
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41 /* These macros are adapted from videotestsrc.c |
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42 * and/or gst-plugins/gst/games/gstvideoimage.c */ |
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43 |
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44 /* I420 */ |
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45 #define I420_Y_ROWSTRIDE(width) (GST_ROUND_UP_4(width)) |
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46 #define I420_U_ROWSTRIDE(width) (GST_ROUND_UP_8(width)/2) |
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47 #define I420_V_ROWSTRIDE(width) ((GST_ROUND_UP_8(I420_Y_ROWSTRIDE(width)))/2) |
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48 |
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49 #define I420_Y_OFFSET(w,h) (0) |
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50 #define I420_U_OFFSET(w,h) (I420_Y_OFFSET(w,h)+(I420_Y_ROWSTRIDE(w)*GST_ROUND_UP_2(h))) |
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51 #define I420_V_OFFSET(w,h) (I420_U_OFFSET(w,h)+(I420_U_ROWSTRIDE(w)*GST_ROUND_UP_2(h)/2)) |
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52 |
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53 #define I420_SIZE(w,h) (I420_V_OFFSET(w,h)+(I420_V_ROWSTRIDE(w)*GST_ROUND_UP_2(h)/2)) |
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54 |
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55 /* JpegEnc signals and args */ |
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56 enum |
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57 { |
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58 FRAME_ENCODED, |
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59 /* FILL ME */ |
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60 LAST_SIGNAL |
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61 }; |
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62 |
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63 enum |
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64 { |
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65 ARG_0, |
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66 ARG_QUALITY, |
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67 ARG_SMOOTHING |
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68 /* FILL ME */ |
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69 }; |
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70 |
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71 static void gst_jpegenc_base_init (gpointer g_class); |
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72 static void gst_jpegenc_class_init (GstJpegEnc * klass); |
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73 static void gst_jpegenc_init (GstJpegEnc * jpegenc); |
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74 static void gst_jpegenc_finalize (GObject * object); |
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75 |
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76 static GstFlowReturn gst_jpegenc_chain (GstPad * pad, GstBuffer * buf); |
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77 static gboolean gst_jpegenc_setcaps (GstPad * pad, GstCaps * caps); |
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78 static GstCaps *gst_jpegenc_getcaps (GstPad * pad); |
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79 |
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80 static void gst_jpegenc_resync (GstJpegEnc * jpegenc); |
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81 static void gst_jpegenc_set_property (GObject * object, guint prop_id, |
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82 const GValue * value, GParamSpec * pspec); |
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83 static void gst_jpegenc_get_property (GObject * object, guint prop_id, |
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84 GValue * value, GParamSpec * pspec); |
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85 static GstStateChangeReturn gst_jpegenc_change_state (GstElement * element, |
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86 GstStateChange transition); |
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87 |
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88 |
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89 static GstElementClass *parent_class = NULL; |
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90 static guint gst_jpegenc_signals[LAST_SIGNAL] = { 0 }; |
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91 |
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92 GType |
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93 gst_jpegenc_get_type (void) |
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94 { |
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95 static GType jpegenc_type = 0; |
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96 |
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97 if (!jpegenc_type) { |
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98 static const GTypeInfo jpegenc_info = { |
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99 sizeof (GstJpegEnc), |
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100 (GBaseInitFunc) gst_jpegenc_base_init, |
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101 NULL, |
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102 (GClassInitFunc) gst_jpegenc_class_init, |
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103 NULL, |
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104 NULL, |
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105 sizeof (GstJpegEnc), |
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106 0, |
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107 (GInstanceInitFunc) gst_jpegenc_init, |
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108 }; |
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109 |
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110 jpegenc_type = |
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111 g_type_register_static (GST_TYPE_ELEMENT, "GstJpegEnc", &jpegenc_info, |
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112 0); |
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113 } |
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114 return jpegenc_type; |
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115 } |
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116 |
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117 static GstStaticPadTemplate gst_jpegenc_sink_pad_template = |
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118 GST_STATIC_PAD_TEMPLATE ("sink", |
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119 GST_PAD_SINK, |
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120 GST_PAD_ALWAYS, |
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121 GST_STATIC_CAPS (GST_VIDEO_CAPS_YUV ("I420")) |
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122 ); |
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123 |
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124 static GstStaticPadTemplate gst_jpegenc_src_pad_template = |
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125 GST_STATIC_PAD_TEMPLATE ("src", |
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126 GST_PAD_SRC, |
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127 GST_PAD_ALWAYS, |
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128 GST_STATIC_CAPS ("image/jpeg, " |
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129 "width = (int) [ 16, 4096 ], " |
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130 "height = (int) [ 16, 4096 ], " "framerate = (fraction) [ 0/1, MAX ]") |
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131 ); |
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132 |
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133 static void |
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134 gst_jpegenc_base_init (gpointer g_class) |
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135 { |
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136 GstElementClass *element_class = GST_ELEMENT_CLASS (g_class); |
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137 |
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138 gst_element_class_add_pad_template (element_class, |
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139 gst_static_pad_template_get (&gst_jpegenc_sink_pad_template)); |
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140 gst_element_class_add_pad_template (element_class, |
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141 gst_static_pad_template_get (&gst_jpegenc_src_pad_template)); |
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142 gst_element_class_set_details (element_class, &gst_jpegenc_details); |
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143 } |
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144 |
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145 static void |
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146 gst_jpegenc_class_init (GstJpegEnc * klass) |
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147 { |
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148 GObjectClass *gobject_class; |
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149 GstElementClass *gstelement_class; |
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150 |
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151 gobject_class = (GObjectClass *) klass; |
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152 gstelement_class = (GstElementClass *) klass; |
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153 |
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154 parent_class = g_type_class_peek_parent (klass); |
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155 |
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156 gst_jpegenc_signals[FRAME_ENCODED] = |
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157 g_signal_new ("frame-encoded", G_TYPE_FROM_CLASS (klass), |
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158 G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstJpegEncClass, frame_encoded), NULL, |
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159 NULL, g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0); |
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160 |
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161 gobject_class->set_property = gst_jpegenc_set_property; |
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162 gobject_class->get_property = gst_jpegenc_get_property; |
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163 |
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164 |
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165 g_object_class_install_property (gobject_class, ARG_QUALITY, |
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166 g_param_spec_int ("quality", "Quality", "Quality of encoding", |
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167 0, 100, JPEG_DEFAULT_QUALITY, G_PARAM_READWRITE)); |
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168 #if 0 |
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169 /* disabled, since it doesn't seem to work */ |
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170 g_object_class_install_property (gobject_class, ARG_SMOOTHING, |
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171 g_param_spec_int ("smoothing", "Smoothing", "Smoothing factor", |
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172 0, 100, 0, G_PARAM_READWRITE)); |
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173 #endif |
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174 |
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175 gstelement_class->change_state = gst_jpegenc_change_state; |
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176 |
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177 gobject_class->finalize = gst_jpegenc_finalize; |
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178 |
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179 GST_DEBUG_CATEGORY_INIT (jpegenc_debug, "jpegenc", 0, |
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180 "JPEG encoding element"); |
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181 } |
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182 |
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183 static void |
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184 gst_jpegenc_init_destination (j_compress_ptr cinfo) |
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185 { |
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186 GST_DEBUG ("gst_jpegenc_chain: init_destination"); |
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187 } |
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188 |
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189 static gboolean |
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190 gst_jpegenc_flush_destination (j_compress_ptr cinfo) |
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191 { |
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192 GST_DEBUG ("gst_jpegenc_chain: flush_destination: buffer too small !!!"); |
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193 return TRUE; |
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194 } |
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195 |
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196 static void |
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197 gst_jpegenc_term_destination (j_compress_ptr cinfo) |
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198 { |
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199 GST_DEBUG ("gst_jpegenc_chain: term_source"); |
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200 } |
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201 |
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202 static void |
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203 gst_jpegenc_init (GstJpegEnc * jpegenc) |
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204 { |
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205 /* create the sink and src pads */ |
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206 jpegenc->sinkpad = |
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207 gst_pad_new_from_static_template (&gst_jpegenc_sink_pad_template, "sink"); |
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208 gst_pad_set_chain_function (jpegenc->sinkpad, |
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209 GST_DEBUG_FUNCPTR (gst_jpegenc_chain)); |
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210 gst_pad_set_getcaps_function (jpegenc->sinkpad, |
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211 GST_DEBUG_FUNCPTR (gst_jpegenc_getcaps)); |
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212 gst_pad_set_setcaps_function (jpegenc->sinkpad, |
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213 GST_DEBUG_FUNCPTR (gst_jpegenc_setcaps)); |
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214 gst_element_add_pad (GST_ELEMENT (jpegenc), jpegenc->sinkpad); |
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215 |
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216 jpegenc->srcpad = |
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217 gst_pad_new_from_static_template (&gst_jpegenc_src_pad_template, "src"); |
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218 gst_pad_set_getcaps_function (jpegenc->sinkpad, |
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219 GST_DEBUG_FUNCPTR (gst_jpegenc_getcaps)); |
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220 /*gst_pad_set_setcaps_function (jpegenc->sinkpad, gst_jpegenc_setcaps); */ |
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221 gst_pad_use_fixed_caps (jpegenc->sinkpad); |
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222 gst_element_add_pad (GST_ELEMENT (jpegenc), jpegenc->srcpad); |
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223 |
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224 /* reset the initial video state */ |
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225 jpegenc->width = -1; |
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226 jpegenc->height = -1; |
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227 |
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228 /* setup jpeglib */ |
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229 memset (&jpegenc->cinfo, 0, sizeof (jpegenc->cinfo)); |
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230 memset (&jpegenc->jerr, 0, sizeof (jpegenc->jerr)); |
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231 jpegenc->cinfo.err = jpeg_std_error (&jpegenc->jerr); |
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232 jpeg_create_compress (&jpegenc->cinfo); |
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233 |
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234 jpegenc->jdest.init_destination = gst_jpegenc_init_destination; |
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235 jpegenc->jdest.empty_output_buffer = gst_jpegenc_flush_destination; |
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236 jpegenc->jdest.term_destination = gst_jpegenc_term_destination; |
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237 jpegenc->cinfo.dest = &jpegenc->jdest; |
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238 |
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239 jpegenc->quality = JPEG_DEFAULT_QUALITY; |
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240 jpegenc->smoothing = 0; |
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241 } |
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242 |
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243 static void |
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244 gst_jpegenc_finalize (GObject * object) |
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245 { |
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246 |
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247 GstJpegEnc *filter = GST_JPEGENC (object); |
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248 |
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249 jpeg_destroy_compress (&filter->cinfo); |
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250 |
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251 G_OBJECT_CLASS (parent_class)->finalize (object); |
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252 } |
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253 |
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254 static GstCaps * |
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255 gst_jpegenc_getcaps (GstPad * pad) |
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256 { |
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257 GstJpegEnc *jpegenc = GST_JPEGENC (gst_pad_get_parent (pad)); |
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258 GstPad *otherpad; |
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259 GstCaps *caps; |
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260 const char *name; |
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261 int i; |
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262 GstStructure *structure = NULL; |
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263 |
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264 /* we want to proxy properties like width, height and framerate from the |
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265 other end of the element */ |
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266 otherpad = (pad == jpegenc->srcpad) ? jpegenc->sinkpad : jpegenc->srcpad; |
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267 caps = gst_pad_get_allowed_caps (otherpad); |
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268 if (pad == jpegenc->srcpad) { |
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269 name = "image/jpeg"; |
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270 } else { |
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271 name = "video/x-raw-yuv"; |
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272 } |
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273 for (i = 0; i < gst_caps_get_size (caps); i++) { |
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274 structure = gst_caps_get_structure (caps, i); |
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275 |
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276 gst_structure_set_name (structure, name); |
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277 gst_structure_remove_field (structure, "format"); |
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278 /* ... but for the sink pad, we only do I420 anyway, so add that */ |
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279 if (pad == jpegenc->sinkpad) { |
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280 gst_structure_set (structure, "format", GST_TYPE_FOURCC, |
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281 GST_STR_FOURCC ("I420"), NULL); |
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282 } |
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283 } |
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284 gst_object_unref (jpegenc); |
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285 |
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286 return caps; |
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287 } |
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288 |
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289 static gboolean |
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290 gst_jpegenc_setcaps (GstPad * pad, GstCaps * caps) |
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291 { |
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292 GstJpegEnc *jpegenc = GST_JPEGENC (gst_pad_get_parent (pad)); |
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293 GstStructure *structure; |
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294 GstCaps *othercaps; |
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295 GstPad *otherpad; |
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296 gboolean ret; |
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297 const GValue *framerate; |
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298 |
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299 otherpad = (pad == jpegenc->srcpad) ? jpegenc->sinkpad : jpegenc->srcpad; |
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300 |
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301 structure = gst_caps_get_structure (caps, 0); |
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302 framerate = gst_structure_get_value (structure, "framerate"); |
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303 gst_structure_get_int (structure, "width", &jpegenc->width); |
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304 gst_structure_get_int (structure, "height", &jpegenc->height); |
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305 |
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306 othercaps = gst_caps_copy (gst_pad_get_pad_template_caps (otherpad)); |
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307 if (framerate) { |
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308 gst_caps_set_simple (othercaps, |
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309 "width", G_TYPE_INT, jpegenc->width, |
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310 "height", G_TYPE_INT, jpegenc->height, |
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311 "framerate", GST_TYPE_FRACTION, |
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312 gst_value_get_fraction_numerator (framerate), |
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313 gst_value_get_fraction_denominator (framerate), NULL); |
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314 } else { |
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315 gst_caps_set_simple (othercaps, |
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316 "width", G_TYPE_INT, jpegenc->width, |
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317 "height", G_TYPE_INT, jpegenc->height, NULL); |
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318 } |
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319 |
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320 ret = gst_pad_set_caps (jpegenc->srcpad, othercaps); |
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321 gst_caps_unref (othercaps); |
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322 |
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323 if (GST_PAD_LINK_SUCCESSFUL (ret)) { |
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324 gst_jpegenc_resync (jpegenc); |
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325 } |
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326 |
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327 gst_object_unref (jpegenc); |
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328 |
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329 return ret; |
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330 } |
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331 |
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332 static void |
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333 gst_jpegenc_resync (GstJpegEnc * jpegenc) |
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334 { |
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335 gint width, height; |
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336 |
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337 GST_DEBUG_OBJECT (jpegenc, "resync"); |
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338 |
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339 jpegenc->cinfo.image_width = width = jpegenc->width; |
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340 jpegenc->cinfo.image_height = height = jpegenc->height; |
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341 jpegenc->cinfo.input_components = 3; |
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342 |
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343 GST_DEBUG_OBJECT (jpegenc, "width %d, height %d", width, height); |
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344 |
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345 jpeg_set_defaults (&jpegenc->cinfo); |
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346 jpegenc->cinfo.dct_method = JDCT_FASTEST; |
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347 /*jpegenc->cinfo.dct_method = JDCT_DEFAULT; */ |
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348 /*jpegenc->cinfo.smoothing_factor = jpegenc->smoothing; */ |
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349 jpeg_set_quality (&jpegenc->cinfo, jpegenc->quality, TRUE); |
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350 |
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351 #if 0 |
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352 switch (jpegenc->format) { |
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353 case GST_COLORSPACE_RGB24: |
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354 jpegenc->bufsize = jpegenc->width * jpegenc->height * 3; |
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355 GST_DEBUG ("gst_jpegenc_resync: setting format to RGB24"); |
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356 jpegenc->cinfo.in_color_space = JCS_RGB; |
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357 jpegenc->cinfo.raw_data_in = FALSE; |
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358 break; |
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359 case GST_COLORSPACE_YUV420P: |
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360 #endif |
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361 jpegenc->bufsize = I420_SIZE (jpegenc->width, jpegenc->height); |
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362 jpegenc->cinfo.raw_data_in = TRUE; |
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363 jpegenc->cinfo.in_color_space = JCS_YCbCr; |
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364 GST_DEBUG_OBJECT (jpegenc, "setting format to YUV420P"); |
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365 jpegenc->cinfo.comp_info[0].h_samp_factor = 2; |
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366 jpegenc->cinfo.comp_info[0].v_samp_factor = 2; |
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367 jpegenc->cinfo.comp_info[1].h_samp_factor = 1; |
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368 jpegenc->cinfo.comp_info[1].v_samp_factor = 1; |
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369 jpegenc->cinfo.comp_info[2].h_samp_factor = 1; |
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370 jpegenc->cinfo.comp_info[2].v_samp_factor = 1; |
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371 |
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372 if (height != -1) { |
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373 jpegenc->line[0] = |
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374 g_realloc (jpegenc->line[0], height * sizeof (char *)); |
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375 jpegenc->line[1] = |
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376 g_realloc (jpegenc->line[1], height * sizeof (char *) / 2); |
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377 jpegenc->line[2] = |
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378 g_realloc (jpegenc->line[2], height * sizeof (char *) / 2); |
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379 } |
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380 |
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381 GST_DEBUG_OBJECT (jpegenc, "setting format done"); |
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382 #if 0 |
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383 break; |
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384 default: |
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385 printf ("gst_jpegenc_resync: unsupported colorspace, using RGB\n"); |
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386 jpegenc->bufsize = jpegenc->width * jpegenc->height * 3; |
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387 jpegenc->cinfo.in_color_space = JCS_RGB; |
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388 break; |
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389 } |
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390 #endif |
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391 |
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392 jpeg_suppress_tables (&jpegenc->cinfo, TRUE); |
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393 //jpeg_suppress_tables(&jpegenc->cinfo, FALSE); |
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394 |
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395 jpegenc->buffer = NULL; |
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396 GST_DEBUG_OBJECT (jpegenc, "resync done"); |
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397 } |
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398 |
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399 static GstFlowReturn |
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400 gst_jpegenc_chain (GstPad * pad, GstBuffer * buf) |
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401 { |
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402 GstFlowReturn ret; |
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403 GstJpegEnc *jpegenc; |
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404 guchar *data; |
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405 gulong size; |
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406 GstBuffer *outbuf; |
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407 guint height, width; |
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408 guchar *base[3], *end[3]; |
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409 gint i, j, k; |
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410 |
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411 jpegenc = GST_JPEGENC (GST_OBJECT_PARENT (pad)); |
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412 |
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413 data = GST_BUFFER_DATA (buf); |
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414 size = GST_BUFFER_SIZE (buf); |
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415 |
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416 GST_DEBUG_OBJECT (jpegenc, "got buffer of %u bytes", size); |
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417 |
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418 ret = |
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419 gst_pad_alloc_buffer_and_set_caps (jpegenc->srcpad, |
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420 GST_BUFFER_OFFSET_NONE, jpegenc->bufsize, GST_PAD_CAPS (jpegenc->srcpad), |
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421 &outbuf); |
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422 |
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423 if (ret != GST_FLOW_OK) |
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424 goto done; |
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425 |
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426 gst_buffer_stamp (outbuf, buf); |
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427 |
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428 width = jpegenc->width; |
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429 height = jpegenc->height; |
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430 |
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431 base[0] = data + I420_Y_OFFSET (width, height); |
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432 base[1] = data + I420_U_OFFSET (width, height); |
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433 base[2] = data + I420_V_OFFSET (width, height); |
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434 |
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435 end[0] = base[0] + height * I420_Y_ROWSTRIDE (width); |
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436 end[1] = base[1] + (height / 2) * I420_U_ROWSTRIDE (width); |
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437 end[2] = base[2] + (height / 2) * I420_V_ROWSTRIDE (width); |
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438 |
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439 jpegenc->jdest.next_output_byte = GST_BUFFER_DATA (outbuf); |
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440 jpegenc->jdest.free_in_buffer = GST_BUFFER_SIZE (outbuf); |
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441 |
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442 jpegenc->cinfo.smoothing_factor = jpegenc->smoothing; |
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443 jpeg_set_quality (&jpegenc->cinfo, jpegenc->quality, TRUE); |
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444 jpeg_start_compress (&jpegenc->cinfo, TRUE); |
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445 |
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446 GST_DEBUG_OBJECT (jpegenc, "compressing"); |
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447 |
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448 for (i = 0; i < height; i += 2 * DCTSIZE) { |
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449 /*g_print ("next scanline: %d\n", jpegenc->cinfo.next_scanline); */ |
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450 for (j = 0, k = 0; j < (2 * DCTSIZE); j += 2, k++) { |
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451 jpegenc->line[0][j] = base[0]; |
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452 if (base[0] + I420_Y_ROWSTRIDE (width) < end[0]) |
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453 base[0] += I420_Y_ROWSTRIDE (width); |
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454 jpegenc->line[0][j + 1] = base[0]; |
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455 if (base[0] + I420_Y_ROWSTRIDE (width) < end[0]) |
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456 base[0] += I420_Y_ROWSTRIDE (width); |
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457 jpegenc->line[1][k] = base[1]; |
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458 if (base[1] + I420_U_ROWSTRIDE (width) < end[1]) |
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459 base[1] += I420_U_ROWSTRIDE (width); |
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460 jpegenc->line[2][k] = base[2]; |
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461 if (base[2] + I420_V_ROWSTRIDE (width) < end[2]) |
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462 base[2] += I420_V_ROWSTRIDE (width); |
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463 } |
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464 jpeg_write_raw_data (&jpegenc->cinfo, jpegenc->line, 2 * DCTSIZE); |
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465 } |
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466 |
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467 jpeg_finish_compress (&jpegenc->cinfo); |
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468 GST_DEBUG_OBJECT (jpegenc, "compressing done"); |
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469 |
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470 GST_BUFFER_SIZE (outbuf) = |
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471 GST_ROUND_UP_4 (jpegenc->bufsize - jpegenc->jdest.free_in_buffer); |
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472 |
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473 g_signal_emit (G_OBJECT (jpegenc), gst_jpegenc_signals[FRAME_ENCODED], 0); |
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474 |
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475 ret = gst_pad_push (jpegenc->srcpad, outbuf); |
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476 |
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477 done: |
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478 gst_buffer_unref (buf); |
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479 |
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480 return ret; |
|
481 } |
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482 |
|
483 static void |
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484 gst_jpegenc_set_property (GObject * object, guint prop_id, |
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485 const GValue * value, GParamSpec * pspec) |
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486 { |
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487 GstJpegEnc *jpegenc = GST_JPEGENC (object); |
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488 |
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489 GST_OBJECT_LOCK (jpegenc); |
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490 |
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491 switch (prop_id) { |
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492 case ARG_QUALITY: |
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493 jpegenc->quality = g_value_get_int (value); |
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494 break; |
|
495 case ARG_SMOOTHING: |
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496 jpegenc->smoothing = g_value_get_int (value); |
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497 break; |
|
498 default: |
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499 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); |
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500 break; |
|
501 } |
|
502 |
|
503 GST_OBJECT_UNLOCK (jpegenc); |
|
504 } |
|
505 |
|
506 static void |
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507 gst_jpegenc_get_property (GObject * object, guint prop_id, GValue * value, |
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508 GParamSpec * pspec) |
|
509 { |
|
510 GstJpegEnc *jpegenc = GST_JPEGENC (object); |
|
511 |
|
512 GST_OBJECT_LOCK (jpegenc); |
|
513 |
|
514 switch (prop_id) { |
|
515 case ARG_QUALITY: |
|
516 g_value_set_int (value, jpegenc->quality); |
|
517 break; |
|
518 case ARG_SMOOTHING: |
|
519 g_value_set_int (value, jpegenc->smoothing); |
|
520 break; |
|
521 default: |
|
522 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); |
|
523 break; |
|
524 } |
|
525 |
|
526 GST_OBJECT_UNLOCK (jpegenc); |
|
527 } |
|
528 |
|
529 static GstStateChangeReturn |
|
530 gst_jpegenc_change_state (GstElement * element, GstStateChange transition) |
|
531 { |
|
532 GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS; |
|
533 GstJpegEnc *filter = GST_JPEGENC (element); |
|
534 |
|
535 switch (transition) { |
|
536 case GST_STATE_CHANGE_NULL_TO_READY: |
|
537 GST_DEBUG_OBJECT (element, "setting line buffers"); |
|
538 filter->line[0] = NULL; |
|
539 filter->line[1] = NULL; |
|
540 filter->line[2] = NULL; |
|
541 gst_jpegenc_resync (filter); |
|
542 break; |
|
543 default: |
|
544 break; |
|
545 } |
|
546 |
|
547 ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition); |
|
548 if (ret == GST_STATE_CHANGE_FAILURE) |
|
549 return ret; |
|
550 |
|
551 switch (transition) { |
|
552 case GST_STATE_CHANGE_READY_TO_NULL: |
|
553 g_free (filter->line[0]); |
|
554 g_free (filter->line[1]); |
|
555 g_free (filter->line[2]); |
|
556 filter->line[0] = NULL; |
|
557 filter->line[1] = NULL; |
|
558 filter->line[2] = NULL; |
|
559 break; |
|
560 default: |
|
561 break; |
|
562 } |
|
563 |
|
564 return ret; |
|
565 } |