1 /* GStreamer 2 * Copyright (C) 2020 Ognyan Tonchev <ognyan at axis dot 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 20 #ifndef __GST_BUFFER_MEMORY_H__ 21 #define __GST_BUFFER_MEMORY_H__ 22 23 #include <gst/gst.h> 24 25 G_BEGIN_DECLS 26 27 struct _GstBufferMemoryMap 28 { 29 /* private datas */ 30 31 GstBuffer *buf; 32 GstMemory *mem; 33 GstMapInfo map; 34 guint index; 35 gsize total_size; 36 37 /* public datas */ 38 39 /* data of the currently mapped memory */ 40 const guint8 *data; 41 guint offset; 42 43 /* size of the currently mapped memory */ 44 gsize size; 45 46 /* When advancing through the data with gst_buffer_memory_advance_bytes () 47 * the data field is also advanced and the size field decreased with the 48 * corresponding number of bytes. If all the bytes from the currently mapped 49 * GstMemory have been consumed then a new GstMemory will be mapped and data 50 * and size fileds will be updated. 51 * */ 52 }; 53 typedef struct _GstBufferMemoryMap GstBufferMemoryMap; 54 55 G_GNUC_INTERNAL 56 gboolean gst_buffer_memory_map (GstBuffer * buffer, GstBufferMemoryMap * map); 57 58 G_GNUC_INTERNAL 59 gboolean gst_buffer_memory_advance_bytes (GstBufferMemoryMap * map, gsize size); 60 61 G_GNUC_INTERNAL 62 void gst_buffer_memory_unmap (GstBufferMemoryMap * map); 63 64 G_END_DECLS 65 66 #endif /* __GST_BUFFER_MEMORY_H__ */ 67