Hyunjun Ko | dddb848 | 2018-02-13 13:50:08 -0900 | [diff] [blame] | 1 | /* GStreamer Intel MSDK plugin |
| 2 | * Copyright (c) 2018, Intel Corporation |
| 3 | * Copyright (c) 2018, Igalia S.L. |
| 4 | * All rights reserved. |
| 5 | * |
| 6 | * Redistribution and use in source and binary forms, with or without |
| 7 | * modification, are permitted provided that the following conditions are met: |
| 8 | * |
| 9 | * 1. Redistributions of source code must retain the above copyright notice, |
| 10 | * this list of conditions and the following disclaimer. |
| 11 | * |
| 12 | * 2. Redistributions in binary form must reproduce the above copyright notice, |
| 13 | * this list of conditions and the following disclaimer in the documentation |
| 14 | * and/or other materials provided with the distribution. |
| 15 | * |
| 16 | * 3. Neither the name of the copyright holder nor the names of its contributors |
| 17 | * may be used to endorse or promote products derived from this software |
| 18 | * without specific prior written permission. |
| 19 | * |
| 20 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| 21 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, |
| 22 | * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| 23 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR |
| 24 | * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| 25 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| 26 | * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; |
| 27 | * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
| 28 | * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGDECE |
| 29 | * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, |
| 30 | * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 31 | */ |
| 32 | |
| 33 | #include "gstmsdkcontextutil.h" |
| 34 | |
| 35 | GST_DEBUG_CATEGORY_STATIC (GST_CAT_CONTEXT); |
| 36 | |
| 37 | static void |
| 38 | _init_context_debug (void) |
| 39 | { |
| 40 | #ifndef GST_DISABLE_GST_DEBUG |
| 41 | static volatile gsize _init = 0; |
| 42 | |
| 43 | if (g_once_init_enter (&_init)) { |
| 44 | GST_DEBUG_CATEGORY_GET (GST_CAT_CONTEXT, "GST_CONTEXT"); |
| 45 | g_once_init_leave (&_init, 1); |
| 46 | } |
| 47 | #endif |
| 48 | } |
| 49 | |
| 50 | static gboolean |
| 51 | context_pad_query (const GValue * item, GValue * value, gpointer user_data) |
| 52 | { |
| 53 | GstPad *const pad = g_value_get_object (item); |
| 54 | GstQuery *const query = user_data; |
| 55 | |
| 56 | if (gst_pad_peer_query (pad, query)) { |
| 57 | g_value_set_boolean (value, TRUE); |
| 58 | return FALSE; |
| 59 | } |
| 60 | |
| 61 | GST_CAT_INFO_OBJECT (GST_CAT_CONTEXT, pad, "context pad peer query failed"); |
| 62 | return TRUE; |
| 63 | } |
| 64 | |
| 65 | static gboolean |
| 66 | _gst_context_run_query (GstElement * element, GstQuery * query, |
| 67 | GstPadDirection direction) |
| 68 | { |
| 69 | GstIteratorFoldFunction const func = context_pad_query; |
| 70 | GstIterator *it; |
| 71 | GValue res = { 0 }; |
| 72 | |
| 73 | g_value_init (&res, G_TYPE_BOOLEAN); |
| 74 | g_value_set_boolean (&res, FALSE); |
| 75 | |
| 76 | /* Ask neighbour */ |
| 77 | if (direction == GST_PAD_SRC) |
| 78 | it = gst_element_iterate_src_pads (element); |
| 79 | else |
| 80 | it = gst_element_iterate_sink_pads (element); |
| 81 | |
| 82 | while (gst_iterator_fold (it, func, &res, query) == GST_ITERATOR_RESYNC) |
| 83 | gst_iterator_resync (it); |
| 84 | gst_iterator_free (it); |
| 85 | |
| 86 | return g_value_get_boolean (&res); |
| 87 | } |
| 88 | |
| 89 | static gboolean |
| 90 | _gst_context_get_from_query (GstElement * element, GstQuery * query, |
| 91 | GstPadDirection direction) |
| 92 | { |
| 93 | GstContext *ctxt; |
| 94 | |
| 95 | if (!_gst_context_run_query (element, query, direction)) |
| 96 | return FALSE; |
| 97 | |
| 98 | gst_query_parse_context (query, &ctxt); |
| 99 | if (!ctxt) |
| 100 | return FALSE; |
| 101 | |
| 102 | GST_CAT_INFO_OBJECT (GST_CAT_CONTEXT, element, |
| 103 | "found context (%" GST_PTR_FORMAT ") in %s query", ctxt, |
| 104 | direction == GST_PAD_SRC ? "downstream" : "upstream"); |
| 105 | |
| 106 | gst_element_set_context (element, ctxt); |
| 107 | return TRUE; |
| 108 | } |
| 109 | |
| 110 | static void |
| 111 | _gst_context_query (GstElement * element, const gchar * context_type) |
| 112 | { |
| 113 | GstQuery *query; |
| 114 | GstMessage *msg; |
| 115 | |
| 116 | /* 2) Query downstream with GST_QUERY_CONTEXT for the context and |
| 117 | check if downstream already has a context of the specific |
| 118 | type */ |
| 119 | |
| 120 | /* 3) Query upstream with GST_QUERY_CONTEXT for the context and |
| 121 | check if upstream already has a context of the specific |
| 122 | type */ |
| 123 | query = gst_query_new_context (context_type); |
| 124 | if (_gst_context_get_from_query (element, query, GST_PAD_SRC)) |
| 125 | goto found; |
| 126 | if (_gst_context_get_from_query (element, query, GST_PAD_SINK)) |
| 127 | goto found; |
| 128 | |
| 129 | /* 4) Post a GST_MESSAGE_NEED_CONTEXT message on the bus with |
| 130 | the required context types and afterwards check if an |
| 131 | usable context was set now as in 1). The message could |
| 132 | be handled by the parent bins of the element and the |
| 133 | application. */ |
| 134 | GST_CAT_INFO_OBJECT (GST_CAT_CONTEXT, element, |
| 135 | "posting `need-context' message"); |
| 136 | |
| 137 | msg = gst_message_new_need_context (GST_OBJECT_CAST (element), context_type); |
| 138 | if (!gst_element_post_message (element, msg)) |
| 139 | GST_CAT_INFO_OBJECT (GST_CAT_CONTEXT, element, "No bus attached"); |
| 140 | |
| 141 | /* Whomever responds to the need-context message performs a |
| 142 | GstElement::set_context() with the required context in which the |
| 143 | element is required to update the display_ptr */ |
| 144 | |
| 145 | found: |
| 146 | gst_query_unref (query); |
| 147 | } |
| 148 | |
| 149 | gboolean |
| 150 | gst_msdk_context_prepare (GstElement * element, GstMsdkContext ** context_ptr) |
| 151 | { |
| 152 | g_return_val_if_fail (element != NULL, FALSE); |
| 153 | g_return_val_if_fail (context_ptr != NULL, FALSE); |
| 154 | |
| 155 | _init_context_debug (); |
| 156 | |
| 157 | /* 1) Check if the element already has a context of the specific type. */ |
| 158 | if (*context_ptr) { |
| 159 | GST_LOG_OBJECT (element, "already have a context %" GST_PTR_FORMAT, |
| 160 | *context_ptr); |
| 161 | return TRUE; |
| 162 | } |
| 163 | |
| 164 | _gst_context_query (element, GST_MSDK_CONTEXT_TYPE_NAME); |
| 165 | |
| 166 | if (*context_ptr) |
| 167 | GST_LOG_OBJECT (element, "found a context %" GST_PTR_FORMAT, *context_ptr); |
| 168 | |
| 169 | return *context_ptr != NULL; |
| 170 | } |
| 171 | |
| 172 | gboolean |
| 173 | gst_msdk_context_get_context (GstContext * context, |
| 174 | GstMsdkContext ** msdk_context) |
| 175 | { |
| 176 | const GstStructure *structure; |
| 177 | const gchar *type; |
| 178 | |
| 179 | g_return_val_if_fail (GST_IS_CONTEXT (context), FALSE); |
| 180 | |
| 181 | type = gst_context_get_context_type (context); |
| 182 | |
| 183 | if (!g_strcmp0 (type, GST_MSDK_CONTEXT_TYPE_NAME)) { |
| 184 | structure = gst_context_get_structure (context); |
| 185 | return gst_structure_get (structure, GST_MSDK_CONTEXT_TYPE_NAME, |
| 186 | GST_TYPE_MSDK_CONTEXT, msdk_context, NULL); |
| 187 | } |
| 188 | |
| 189 | return FALSE; |
| 190 | } |
| 191 | |
| 192 | static void |
| 193 | gst_msdk_context_propagate (GstElement * element, GstMsdkContext * msdk_context) |
| 194 | { |
| 195 | GstContext *context; |
| 196 | GstStructure *structure; |
| 197 | GstMessage *msg; |
| 198 | |
| 199 | context = gst_context_new (GST_MSDK_CONTEXT_TYPE_NAME, FALSE); |
| 200 | |
| 201 | structure = gst_context_writable_structure (context); |
| 202 | gst_structure_set (structure, GST_MSDK_CONTEXT_TYPE_NAME, |
| 203 | GST_TYPE_MSDK_CONTEXT, msdk_context, NULL); |
| 204 | |
| 205 | gst_element_set_context (element, context); |
| 206 | |
| 207 | GST_CAT_INFO_OBJECT (GST_CAT_CONTEXT, element, |
| 208 | "posting `have-context' message with MSDK context %" GST_PTR_FORMAT, |
| 209 | msdk_context); |
| 210 | |
| 211 | msg = gst_message_new_have_context (GST_OBJECT_CAST (element), context); |
| 212 | if (!gst_element_post_message (element, msg)) { |
| 213 | GST_CAT_INFO_OBJECT (GST_CAT_CONTEXT, element, "No bus attached"); |
| 214 | } |
| 215 | } |
| 216 | |
| 217 | gboolean |
Hyunjun Ko | dc82ccb | 2018-02-13 13:50:48 -0900 | [diff] [blame] | 218 | gst_msdk_context_ensure_context (GstElement * element, gboolean hardware, |
| 219 | GstMsdkContextJobType job) |
Hyunjun Ko | dddb848 | 2018-02-13 13:50:08 -0900 | [diff] [blame] | 220 | { |
| 221 | GstMsdkContext *msdk_context; |
| 222 | |
Hyunjun Ko | dc82ccb | 2018-02-13 13:50:48 -0900 | [diff] [blame] | 223 | msdk_context = gst_msdk_context_new (hardware, job); |
Hyunjun Ko | dddb848 | 2018-02-13 13:50:08 -0900 | [diff] [blame] | 224 | if (!msdk_context) { |
| 225 | GST_ERROR_OBJECT (element, "Context creation failed"); |
| 226 | return FALSE; |
| 227 | } |
| 228 | |
| 229 | GST_INFO_OBJECT (element, "New MSDK Context %p", msdk_context); |
| 230 | |
| 231 | gst_msdk_context_propagate (element, msdk_context); |
| 232 | gst_object_unref (msdk_context); |
| 233 | |
| 234 | return TRUE; |
| 235 | } |