codecparsers: bitwriter: Add the common bit writer functions for H264.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1051>

subprojects/gst-plugins-bad/gst-libs/gst/codecparsers/gsth264bitwriter.h

@@ -0,0 +1,87 @@
+/* GStreamer
+ *  Copyright (C) 2020 Intel Corporation
+ *     Author: He Junyan <junyan.he@intel.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the0
+ * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#ifndef __GST_H264_BIT_WRITER_H__
+#define __GST_H264_BIT_WRITER_H__
+
+#include <gst/codecparsers/codecparsers-prelude.h>
+#include <gst/codecparsers/gsth264parser.h>
+
+G_BEGIN_DECLS
+
+/**
+ * GstH264BitWriterResult:
+ * @GST_H264_BIT_WRITER_OK: The writing succeeded
+ * @GST_H264_BIT_WRITER_INVALID_DATA: The input data to write is invalid
+ * @GST_H264_BIT_WRITER_NO_MORE_SPACE: The output does not have enough size
+ * @GST_H264_BIT_WRITER_ERROR: An general error occurred when writing
+ *
+ * The result of writing H264 data into bit stream.
+ *
+ * Since: 1.22
+ */
+typedef enum
+{
+  GST_H264_BIT_WRITER_OK,
+  GST_H264_BIT_WRITER_INVALID_DATA,
+  GST_H264_BIT_WRITER_NO_MORE_SPACE,
+  GST_H264_BIT_WRITER_ERROR
+} GstH264BitWriterResult;
+
+GST_CODEC_PARSERS_API
+GstH264BitWriterResult     gst_h264_bit_writer_sps       (const GstH264SPS * sps,
+                                                          gboolean start_code,
+                                                          guint8 * data,
+                                                          gsize * size);
+GST_CODEC_PARSERS_API
+GstH264BitWriterResult     gst_h264_bit_writer_pps       (const GstH264PPS * pps,
+                                                          gboolean start_code,
+                                                          guint8 * data,
+                                                          gsize * size);
+GST_CODEC_PARSERS_API
+GstH264BitWriterResult     gst_h264_bit_writer_slice_hdr (const GstH264SliceHdr * slice,
+                                                          gboolean start_code,
+                                                          GstH264NalUnitType nal_type,
+                                                          gboolean is_ref,
+                                                          guint8 * data,
+                                                          gsize * size);
+GST_CODEC_PARSERS_API
+GstH264BitWriterResult     gst_h264_bit_writer_sei       (GArray * sei_messages,
+                                                          gboolean start_code,
+                                                          guint8 * data,
+                                                          gsize * size);
+GST_CODEC_PARSERS_API
+GstH264BitWriterResult     gst_h264_bit_writer_aud       (guint8 primary_pic_type,
+                                                          gboolean start_code,
+                                                          guint8 * data,
+                                                          gsize * size);
+GST_CODEC_PARSERS_API
+GstH264BitWriterResult     gst_h264_bit_writer_convert_to_nal (guint nal_prefix_size,
+                                                               gboolean packetized,
+                                                               gboolean has_startcode,
+                                                               gboolean add_trailings,
+                                                               const guint8 * raw_data,
+                                                               gsize raw_size,
+                                                               guint8 * nal_data,
+                                                               guint32 * nal_size);
+
+G_END_DECLS
+
+#endif /* __GST_H264_BIT_WRITER_H__ */

subprojects/gst-plugins-bad/gst-libs/gst/codecparsers/meson.build

@@ -15,7 +15,8 @@ codecparser_sources = files([
   'dboolhuff.c',
   'vp8utils.c',
   'gstmpegvideometa.c',
-  'gstav1parser.c'
+  'gstav1parser.c',
+  'gsth264bitwriter.c',
 ])
 codecparser_headers = [
   'codecparsers-prelude.h',
@@ -30,7 +31,8 @@ codecparser_headers = [
   'gstjpegparser.h',
   'gstmpegvideometa.h',
   'gstvp9parser.h',
-  'gstav1parser.h'
+  'gstav1parser.h',
+  'gsth264bitwriter.h',
 ]
 install_headers(codecparser_headers, subdir : 'gstreamer-1.0/gst/codecparsers')