1 files changed, 136 insertions, 0 deletions
diff --git a/subprojects/gst-plugins-bad/gst/mpegpsmux/mpegpsmux_aac.c b/subprojects/gst-plugins-bad/gst/mpegpsmux/mpegpsmux_aac.c
new file mode 100644
index 0000000000..b320fbef77
--- /dev/null
+++ b/subprojects/gst-plugins-bad/gst/mpegpsmux/mpegpsmux_aac.c
@@ -0,0 +1,136 @@
+/* 
+ * Copyright 2006, 2007, 2008 Fluendo S.A. 
+ *  Authors: Jan Schmidt <jan@fluendo.com>
+ *           Kapil Agrawal <kapil@fluendo.com>
+ *           Julien Moutte <julien@fluendo.com>
+ *
+ * Copyright 2008 Lin YANG <oxcsnicho@gmail.com>
+ *
+ * This library is licensed under 3 different licenses and you
+ * can choose to use it under the terms of any one of them. The
+ * three licenses are the MPL 1.1, the LGPL and the MIT license.
+ *
+ * MPL:
+ * 
+ * The contents of this file are subject to the Mozilla Public License
+ * Version 1.1 (the "License"); you may not use this file except in
+ * compliance with the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/.
+ *
+ * Software distributed under the License is distributed on an "AS IS"
+ * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
+ * License for the specific language governing rights and limitations
+ * under the License.
+ *
+ * LGPL:
+ *
+ * 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 the
+ * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ *
+ * MIT:
+ *
+ * Unless otherwise indicated, Source Code is licensed under MIT license.
+ * See further explanation attached in License Statement (distributed in the file
+ * LICENSE).
+ * 
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
+ * of the Software, and to permit persons to whom the Software is furnished to do
+ * so, subject to the following conditions:
+ * 
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ * SPDX-License-Identifier: MPL-1.1 OR MIT OR LGPL-2.0-or-later
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include "mpegpsmux_aac.h"
+#include <string.h>
+
+GST_DEBUG_CATEGORY_EXTERN (mpegpsmux_debug);
+#define GST_CAT_DEFAULT mpegpsmux_debug
+
+GstBuffer *
+mpegpsmux_prepare_aac (GstBuffer * buf, MpegPsPadData * data, MpegPsMux * mux)
+{
+  GstBuffer *out_buf;
+  GstMemory *mem;
+  gsize out_size;
+  guint8 *adts_header, codec_data[2];
+  guint8 rate_idx = 0, channels = 0, obj_type = 0;
+
+  GST_DEBUG_OBJECT (mux, "Preparing AAC buffer for output");
+
+  adts_header = g_malloc0 (7);
+
+  /* We want the same data and metadata, and then prepend some bytes */
+  out_buf = gst_buffer_copy (buf);
+  out_size = gst_buffer_get_size (buf) + 7;
+
+  gst_buffer_extract (data->codec_data, 0, codec_data, 2);
+
+  /* Generate ADTS header */
+  obj_type = (codec_data[0] & 0xC) >> 2;
+  obj_type++;
+  rate_idx = (codec_data[0] & 0x3) << 1;
+  rate_idx |= (codec_data[1] & 0x80) >> 7;
+  channels = (codec_data[1] & 0x78) >> 3;
+  GST_DEBUG_OBJECT (mux, "Rate index %u, channels %u, object type %u", rate_idx,
+      channels, obj_type);
+  /* Sync point over a full byte */
+  adts_header[0] = 0xFF;
+  /* Sync point continued over first 4 bits + static 4 bits
+   * (ID, layer, protection)*/
+  adts_header[1] = 0xF1;
+  /* Object type over first 2 bits */
+  adts_header[2] = obj_type << 6;
+  /* rate index over next 4 bits */
+  adts_header[2] |= (rate_idx << 2);
+  /* channels over last 2 bits */
+  adts_header[2] |= (channels & 0x4) >> 2;
+  /* channels continued over next 2 bits + 4 bits at zero */
+  adts_header[3] = (channels & 0x3) << 6;
+  /* frame size over last 2 bits */
+  adts_header[3] |= (gst_buffer_get_size (out_buf) & 0x1800) >> 11;
+  /* frame size continued over full byte */
+  adts_header[4] = (out_size & 0x1FF8) >> 3;
+  /* frame size continued first 3 bits */
+  adts_header[5] = (out_size & 0x7) << 5;
+  /* buffer fullness (0x7FF for VBR) over 5 last bits */
+  adts_header[5] |= 0x1F;
+  /* buffer fullness (0x7FF for VBR) continued over 6 first bits + 2 zeros for
+   * number of raw data blocks */
+  adts_header[6] = 0xFC;
+
+  /* Prepend ADTS header */
+  mem = gst_memory_new_wrapped (0, adts_header, 7, 0, 7, adts_header, g_free);
+  gst_buffer_prepend_memory (out_buf, mem);
+
+  return out_buf;
+}