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Generate an index table for essence streams during playback and make sure that only the correct essence elements are used for played tracks. Make it possible to have one essence stream used in multiple playback tracks. Fix some minor bugs.
209 lines
5.5 KiB
C
209 lines
5.5 KiB
C
/* GStreamer
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* Copyright (C) 2008-2009 Sebastian Dröge <sebastian.droege@collabora.co.uk>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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/* Implementation of SMPTE 422M - Mapping JPEG2000 codestreams into the MXF
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* Generic Container
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*/
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/* TODO:
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* - parse the jpeg2000 sub-descriptor, see SMPTE 422M 7.2
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* - Add support for XYZ colorspace
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <gst/gst.h>
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#include <string.h>
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#include "mxfjpeg2000.h"
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GST_DEBUG_CATEGORY_EXTERN (mxf_debug);
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#define GST_CAT_DEFAULT mxf_debug
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static gboolean
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mxf_is_jpeg2000_essence_track (const MXFMetadataTimelineTrack * track)
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{
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guint i;
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g_return_val_if_fail (track != NULL, FALSE);
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if (track->parent.descriptor == NULL)
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return FALSE;
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for (i = 0; i < track->parent.n_descriptor; i++) {
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MXFMetadataFileDescriptor *d = track->parent.descriptor[i];
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MXFUL *key;
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if (!d)
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continue;
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key = &d->essence_container;
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/* SMPTE 422M 5.4 */
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if (mxf_is_generic_container_essence_container_label (key) &&
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key->u[12] == 0x02 && key->u[13] == 0x0c &&
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(key->u[14] == 0x01 || key->u[14] == 0x02))
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return TRUE;
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}
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return FALSE;
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}
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static GstFlowReturn
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mxf_jpeg2000_handle_essence_element (const MXFUL * key, GstBuffer * buffer,
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GstCaps * caps,
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MXFMetadataTimelineTrack * track,
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gpointer mapping_data, GstBuffer ** outbuf)
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{
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*outbuf = buffer;
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/* SMPTE 422M 5.1 */
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if (key->u[12] != 0x15 || (key->u[14] != 0x08 && key->u[14] != 0x09)) {
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GST_ERROR ("Invalid JPEG2000 essence element");
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return GST_FLOW_ERROR;
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}
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return GST_FLOW_OK;
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}
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static GstCaps *
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mxf_jpeg2000_create_caps (MXFMetadataTimelineTrack * track, GstTagList ** tags,
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MXFEssenceElementHandleFunc * handler, gpointer * mapping_data)
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{
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MXFMetadataFileDescriptor *f = NULL;
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MXFMetadataGenericPictureEssenceDescriptor *p = NULL;
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guint i;
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GstCaps *caps = NULL;
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guint32 fourcc;
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g_return_val_if_fail (track != NULL, NULL);
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if (track->parent.descriptor == NULL) {
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GST_ERROR ("No descriptor found for this track");
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return NULL;
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}
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for (i = 0; i < track->parent.n_descriptor; i++) {
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if (!track->parent.descriptor[i])
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continue;
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if (MXF_IS_METADATA_GENERIC_PICTURE_ESSENCE_DESCRIPTOR (track->parent.
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descriptor[i])) {
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p = (MXFMetadataGenericPictureEssenceDescriptor *) track->
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parent.descriptor[i];
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f = track->parent.descriptor[i];
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break;
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} else if (MXF_IS_METADATA_FILE_DESCRIPTOR (track->parent.descriptor[i]) &&
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!MXF_IS_METADATA_MULTIPLE_DESCRIPTOR (track->parent.descriptor[i])) {
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f = track->parent.descriptor[i];
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}
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}
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if (!f) {
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GST_ERROR ("No descriptor found for this track");
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return NULL;
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}
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fourcc = GST_MAKE_FOURCC ('s', 'R', 'G', 'B');
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if (p && MXF_IS_METADATA_CDCI_PICTURE_ESSENCE_DESCRIPTOR (p)) {
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fourcc = GST_MAKE_FOURCC ('s', 'Y', 'U', 'V');
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} else if (p && MXF_IS_METADATA_RGBA_PICTURE_ESSENCE_DESCRIPTOR (p)) {
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MXFMetadataRGBAPictureEssenceDescriptor *r =
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(MXFMetadataRGBAPictureEssenceDescriptor *) p;
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gboolean rgb = TRUE;
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gboolean xyz = TRUE;
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gboolean yuv = TRUE;
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guint i;
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if (r->pixel_layout) {
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for (i = 0; i < r->n_pixel_layout; i++) {
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guint8 c = r->pixel_layout[2 * i];
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switch (c) {
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case 'R':
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case 'r':
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case 'G':
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case 'g':
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case 'B':
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case 'b':
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xyz = yuv = FALSE;
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break;
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case 'Y':
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case 'y':
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rgb = FALSE;
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break;
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case 'U':
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case 'u':
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case 'V':
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case 'v':
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xyz = rgb = FALSE;
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break;
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case 'X':
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case 'x':
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case 'Z':
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case 'z':
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rgb = yuv = FALSE;
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break;
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default:
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break;
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}
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}
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if (rgb) {
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fourcc = GST_MAKE_FOURCC ('s', 'R', 'G', 'B');
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} else if (yuv) {
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fourcc = GST_MAKE_FOURCC ('s', 'Y', 'U', 'V');
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} else if (xyz) {
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GST_ERROR ("JPEG2000 with XYZ colorspace not supported yet");
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return NULL;
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}
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}
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}
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*handler = mxf_jpeg2000_handle_essence_element;
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/* TODO: What about other field values? */
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caps =
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gst_caps_new_simple ("image/x-jpc", "fields", G_TYPE_INT, 1, "fourcc",
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GST_TYPE_FOURCC, fourcc, NULL);
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if (p) {
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mxf_metadata_generic_picture_essence_descriptor_set_caps (p, caps);
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} else {
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GST_WARNING ("Only a generic file descriptor found");
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}
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if (!*tags)
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*tags = gst_tag_list_new ();
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gst_tag_list_add (*tags, GST_TAG_MERGE_APPEND, GST_TAG_VIDEO_CODEC,
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"JPEG 2000", NULL);
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return caps;
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}
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static const MXFEssenceElementHandler mxf_jpeg2000_essence_element_handler = {
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mxf_is_jpeg2000_essence_track,
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mxf_jpeg2000_create_caps
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};
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void
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mxf_jpeg2000_init (void)
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{
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mxf_essence_element_handler_register (&mxf_jpeg2000_essence_element_handler);
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}
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