1 /* GStreamer MXF Apple ProRes Mapping
2 * Copyright (C) 2019 Tim-Philipp Müller <tim@centricular.com>
3 *
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Library General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
8 *
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Library General Public License for more details.
13 *
14 * You should have received a copy of the GNU Library General Public
15 * License along with this library; if not, write to the
16 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
17 * Boston, MA 02110-1301, USA.
18 */
19 #ifdef HAVE_CONFIG_H
20 #include "config.h"
21 #endif
22
23 #include <gst/gst.h>
24 #include <gst/video/video.h>
25 #include <string.h>
26
27 #include "mxfprores.h"
28 #include "mxfessence.h"
29
30 GST_DEBUG_CATEGORY_EXTERN (mxf_debug);
31 #define GST_CAT_DEFAULT mxf_debug
32
33 /* Implementation of SMPTE RDD 44:2017-11 "Material Exchange Format - Mapping
34 * and Application of Apple ProRes"
35 */
36 static gboolean
mxf_is_prores_essence_track(const MXFMetadataTimelineTrack * track)37 mxf_is_prores_essence_track (const MXFMetadataTimelineTrack * track)
38 {
39 guint i;
40
41 g_return_val_if_fail (track != NULL, FALSE);
42
43 if (track->parent.descriptor == NULL)
44 return FALSE;
45
46 for (i = 0; i < track->parent.n_descriptor; i++) {
47 MXFMetadataFileDescriptor *d = track->parent.descriptor[i];
48 MXFUL *key;
49
50 if (!d)
51 continue;
52
53 key = &d->essence_container;
54 if (mxf_is_generic_container_essence_container_label (key) &&
55 key->u[12] == 0x02 && key->u[13] == 0x1C) {
56 return TRUE;
57 }
58 }
59
60 return FALSE;
61 }
62
63 static GstFlowReturn
mxf_prores_handle_essence_element(const MXFUL * key,GstBuffer * buffer,GstCaps * caps,MXFMetadataTimelineTrack * track,gpointer mapping_data,GstBuffer ** outbuf)64 mxf_prores_handle_essence_element (const MXFUL * key, GstBuffer * buffer,
65 GstCaps * caps,
66 MXFMetadataTimelineTrack * track,
67 gpointer mapping_data, GstBuffer ** outbuf)
68 {
69 *outbuf = buffer;
70
71 /* SMPTE RDD 41:2017-11 6.3 */
72 if (key->u[12] != 0x15 || key->u[14] != 0x17) {
73 GST_MEMDUMP ("Essence element", &key->u[0], 16);
74 GST_ERROR ("Invalid ProRes essence element");
75 return GST_FLOW_ERROR;
76 }
77
78 return GST_FLOW_OK;
79 }
80
81 static MXFEssenceWrapping
mxf_prores_get_track_wrapping(const MXFMetadataTimelineTrack * track)82 mxf_prores_get_track_wrapping (const MXFMetadataTimelineTrack * track)
83 {
84 guint i;
85
86 g_return_val_if_fail (track != NULL, MXF_ESSENCE_WRAPPING_CUSTOM_WRAPPING);
87
88 if (track->parent.descriptor == NULL) {
89 GST_ERROR ("No descriptor found for this track");
90 return MXF_ESSENCE_WRAPPING_CUSTOM_WRAPPING;
91 }
92
93 for (i = 0; i < track->parent.n_descriptor; i++) {
94 if (!track->parent.descriptor[i])
95 continue;
96
97 if (!MXF_IS_METADATA_GENERIC_PICTURE_ESSENCE_DESCRIPTOR (track->
98 parent.descriptor[i]))
99 continue;
100
101 /* sanity check */
102 if (track->parent.descriptor[i]->essence_container.u[13] != 0x1C)
103 return MXF_ESSENCE_WRAPPING_CUSTOM_WRAPPING;
104
105 switch (track->parent.descriptor[i]->essence_container.u[14]) {
106 case 0x01:
107 return MXF_ESSENCE_WRAPPING_FRAME_WRAPPING;
108 case 0x02:
109 return MXF_ESSENCE_WRAPPING_CLIP_WRAPPING;
110 default:
111 return MXF_ESSENCE_WRAPPING_CUSTOM_WRAPPING;
112 }
113 }
114
115 return MXF_ESSENCE_WRAPPING_CUSTOM_WRAPPING;
116 }
117
118 static GstCaps *
mxf_prores_create_caps(MXFMetadataTimelineTrack * track,GstTagList ** tags,gboolean * intra_only,MXFEssenceElementHandleFunc * handler,gpointer * mapping_data)119 mxf_prores_create_caps (MXFMetadataTimelineTrack * track, GstTagList ** tags,
120 gboolean * intra_only, MXFEssenceElementHandleFunc * handler,
121 gpointer * mapping_data)
122 {
123 MXFMetadataGenericPictureEssenceDescriptor *d = NULL;
124 const gchar *variant;
125 GstCaps *caps;
126 guint i;
127
128 g_return_val_if_fail (track != NULL, NULL);
129
130 if (track->parent.descriptor == NULL) {
131 GST_ERROR ("No descriptor found for this track");
132 return NULL;
133 }
134
135 for (i = 0; i < track->parent.n_descriptor; i++) {
136 if (MXF_IS_METADATA_GENERIC_PICTURE_ESSENCE_DESCRIPTOR (track->
137 parent.descriptor[i])) {
138 d = MXF_METADATA_GENERIC_PICTURE_ESSENCE_DESCRIPTOR (track->
139 parent.descriptor[i]);
140 break;
141 }
142 }
143
144 if (d == NULL) {
145 GST_ERROR ("No picture essence coding descriptor found for this track");
146 return NULL;
147 }
148
149 if (d->picture_essence_coding.u[13] != 0x06) {
150 GST_MEMDUMP ("Picture essence", &d->picture_essence_coding.u[0], 16);
151 GST_ERROR ("Picture essence coding descriptor not for ProRes?!");
152 return NULL;
153 }
154
155 GST_INFO ("Found Apple ProRes video stream");
156
157 switch (d->picture_essence_coding.u[14]) {
158 case 0x01:
159 variant = "proxy";
160 break;
161 case 0x02:
162 variant = "lt";
163 break;
164 case 0x03:
165 variant = "standard";
166 break;
167 case 0x04:
168 variant = "hq";
169 break;
170 case 0x05:
171 variant = "4444";
172 break;
173 case 0x06:
174 variant = "4444xq";
175 break;
176 default:
177 GST_ERROR ("Unknown ProRes profile %2d", d->picture_essence_coding.u[14]);
178 return NULL;
179 }
180
181 *handler = mxf_prores_handle_essence_element;
182
183 caps = gst_caps_new_simple ("video/x-prores",
184 "variant", G_TYPE_STRING, variant, NULL);
185
186 if (d)
187 mxf_metadata_generic_picture_essence_descriptor_set_caps (d, caps);
188
189 if (!*tags)
190 *tags = gst_tag_list_new_empty ();
191
192 gst_tag_list_add (*tags, GST_TAG_MERGE_APPEND, GST_TAG_CODEC, "Apple ProRes",
193 NULL);
194
195 *intra_only = TRUE;
196
197 return caps;
198 }
199
200 static const MXFEssenceElementHandler mxf_prores_essence_element_handler = {
201 mxf_is_prores_essence_track,
202 mxf_prores_get_track_wrapping,
203 mxf_prores_create_caps
204 };
205
206 void
mxf_prores_init(void)207 mxf_prores_init (void)
208 {
209 mxf_essence_element_handler_register (&mxf_prores_essence_element_handler);
210 }
211