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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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179 lines
5.4 KiB
C
179 lines
5.4 KiB
C
/*
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* GStreamer
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* Copyright (C) 2012 Edward Hervey <edward@collabora.com>
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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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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "gstmpegvideometa.h"
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GST_DEBUG_CATEGORY_STATIC (mpegv_meta_debug);
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#define GST_CAT_DEFAULT mpegv_meta_debug
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static gboolean
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gst_mpeg_video_meta_init (GstMpegVideoMeta * mpeg_video_meta,
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gpointer params, GstBuffer * buffer)
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{
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mpeg_video_meta->sequencehdr = NULL;
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mpeg_video_meta->sequenceext = NULL;
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mpeg_video_meta->sequencedispext = NULL;
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mpeg_video_meta->pichdr = NULL;
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mpeg_video_meta->picext = NULL;
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mpeg_video_meta->quantext = NULL;
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mpeg_video_meta->num_slices = mpeg_video_meta->slice_offset = 0;
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return TRUE;
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}
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static void
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gst_mpeg_video_meta_free (GstMpegVideoMeta * mpeg_video_meta,
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GstBuffer * buffer)
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{
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if (mpeg_video_meta->sequencehdr)
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g_free (mpeg_video_meta->sequencehdr);
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if (mpeg_video_meta->sequenceext)
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g_free (mpeg_video_meta->sequenceext);
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if (mpeg_video_meta->sequencedispext)
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g_free (mpeg_video_meta->sequencedispext);
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if (mpeg_video_meta->pichdr)
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g_free (mpeg_video_meta->pichdr);
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if (mpeg_video_meta->picext)
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g_free (mpeg_video_meta->picext);
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if (mpeg_video_meta->quantext)
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g_free (mpeg_video_meta->quantext);
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}
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static gboolean
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gst_mpeg_video_meta_transform (GstBuffer * dest, GstMeta * meta,
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GstBuffer * buffer, GQuark type, gpointer data)
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{
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GstMpegVideoMeta *smeta, *dmeta;
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smeta = (GstMpegVideoMeta *) meta;
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if (GST_META_TRANSFORM_IS_COPY (type)) {
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GstMetaTransformCopy *copy = data;
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if (!copy->region) {
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/* only copy if the complete data is copied as well */
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dmeta =
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gst_buffer_add_mpeg_video_meta (dest, smeta->sequencehdr,
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smeta->sequenceext, smeta->sequencedispext, smeta->pichdr,
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smeta->picext, smeta->quantext);
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if (!dmeta)
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return FALSE;
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dmeta->num_slices = smeta->num_slices;
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dmeta->slice_offset = smeta->slice_offset;
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}
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} else {
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/* return FALSE, if transform type is not supported */
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return FALSE;
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}
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return TRUE;
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}
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GType
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gst_mpeg_video_meta_api_get_type (void)
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{
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static GType type;
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static const gchar *tags[] = { "memory", NULL }; /* don't know what to set here */
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if (g_once_init_enter (&type)) {
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GType _type = gst_meta_api_type_register ("GstMpegVideoMetaAPI", tags);
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GST_DEBUG_CATEGORY_INIT (mpegv_meta_debug, "mpegvideometa", 0,
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"MPEG-1/2 video GstMeta");
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g_once_init_leave (&type, _type);
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}
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return type;
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}
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const GstMetaInfo *
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gst_mpeg_video_meta_get_info (void)
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{
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static const GstMetaInfo *mpeg_video_meta_info = NULL;
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if (g_once_init_enter ((GstMetaInfo **) & mpeg_video_meta_info)) {
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const GstMetaInfo *meta = gst_meta_register (GST_MPEG_VIDEO_META_API_TYPE,
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"GstMpegVideoMeta", sizeof (GstMpegVideoMeta),
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(GstMetaInitFunction) gst_mpeg_video_meta_init,
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(GstMetaFreeFunction) gst_mpeg_video_meta_free,
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(GstMetaTransformFunction) gst_mpeg_video_meta_transform);
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g_once_init_leave ((GstMetaInfo **) & mpeg_video_meta_info,
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(GstMetaInfo *) meta);
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}
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return mpeg_video_meta_info;
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}
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/**
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* gst_buffer_add_mpeg_video_meta:
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* @buffer: a #GstBuffer
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*
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* Creates and adds a #GstMpegVideoMeta to a @buffer.
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*
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* Provided structures must either be %NULL or GSlice-allocated.
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*
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* Returns: (transfer full): a newly created #GstMpegVideoMeta
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*
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* Since: 1.2
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*/
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GstMpegVideoMeta *
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gst_buffer_add_mpeg_video_meta (GstBuffer * buffer,
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const GstMpegVideoSequenceHdr * seq_hdr,
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const GstMpegVideoSequenceExt * seq_ext,
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const GstMpegVideoSequenceDisplayExt * disp_ext,
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const GstMpegVideoPictureHdr * pic_hdr,
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const GstMpegVideoPictureExt * pic_ext,
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const GstMpegVideoQuantMatrixExt * quant_ext)
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{
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GstMpegVideoMeta *mpeg_video_meta;
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mpeg_video_meta =
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(GstMpegVideoMeta *) gst_buffer_add_meta (buffer,
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GST_MPEG_VIDEO_META_INFO, NULL);
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GST_DEBUG
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("seq_hdr:%p, seq_ext:%p, disp_ext:%p, pic_hdr:%p, pic_ext:%p, quant_ext:%p",
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seq_hdr, seq_ext, disp_ext, pic_hdr, pic_ext, quant_ext);
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if (seq_hdr)
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mpeg_video_meta->sequencehdr =
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g_memdup2 (seq_hdr, sizeof (GstMpegVideoSequenceHdr));
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if (seq_ext)
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mpeg_video_meta->sequenceext =
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g_memdup2 (seq_ext, sizeof (GstMpegVideoSequenceExt));
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if (disp_ext)
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mpeg_video_meta->sequencedispext =
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g_memdup2 (disp_ext, sizeof (GstMpegVideoSequenceDisplayExt));
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mpeg_video_meta->pichdr =
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g_memdup2 (pic_hdr, sizeof (GstMpegVideoPictureHdr));
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if (pic_ext)
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mpeg_video_meta->picext =
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g_memdup2 (pic_ext, sizeof (GstMpegVideoPictureExt));
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if (quant_ext)
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mpeg_video_meta->quantext =
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g_memdup2 (quant_ext, sizeof (GstMpegVideoQuantMatrixExt));
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return mpeg_video_meta;
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}
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