mpegtsmux: spring cleanup, no functional change

1 files changed, 156 insertions, 0 deletions

diff --git a/gst/mpegtsmux/gstbasetsmuxaac.c b/gst/mpegtsmux/gstbasetsmuxaac.c
new file mode 100644
index 000000000..a4e85eeb0
--- /dev/null
+++ b/gst/mpegtsmux/gstbasetsmuxaac.c
@@ -0,0 +1,156 @@
+/* 
+ * Copyright 2006, 2007, 2008 Fluendo S.A. 
+ *  Authors: Jan Schmidt <jan@fluendo.com>
+ *           Kapil Agrawal <kapil@fluendo.com>
+ *           Julien Moutte <julien@fluendo.com>
+ *
+ * This library is licensed under 4 different licenses and you
+ * can choose to use it under the terms of any one of them. The
+ * four licenses are the MPL 1.1, the LGPL, the GPL 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.
+ *
+ * GPL:
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; 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.
+ *
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include "gstbasetsmuxaac.h"
+#include <string.h>
+
+#define GST_CAT_DEFAULT gst_base_ts_mux_debug
+
+GstBuffer *
+gst_base_ts_mux_prepare_aac (GstBuffer * buf, GstBaseTsPadData * data,
+    GstBaseTsMux * mux)
+{
+  guint8 adts_header[7] = { 0, };
+  gsize out_size = gst_buffer_get_size (buf) + 7;
+  GstBuffer *out_buf = gst_buffer_new_and_alloc (out_size);
+  gsize out_offset = 0;
+  guint8 rate_idx = 0, channels = 0, obj_type = 0;
+  GstMapInfo codec_data_map;
+  GstMapInfo buf_map;
+
+  GST_DEBUG_OBJECT (mux, "Preparing AAC buffer for output");
+
+  gst_buffer_copy_into (out_buf, buf,
+      GST_BUFFER_COPY_METADATA | GST_BUFFER_COPY_TIMESTAMPS, 0, 0);
+
+  gst_buffer_map (data->codec_data, &codec_data_map, GST_MAP_READ);
+
+  /* Generate ADTS header */
+  obj_type = GST_READ_UINT8 (codec_data_map.data) >> 3;
+  rate_idx = (GST_READ_UINT8 (codec_data_map.data) & 0x7) << 1;
+  rate_idx |= (GST_READ_UINT8 (codec_data_map.data + 1) & 0x80) >> 7;
+  channels = (GST_READ_UINT8 (codec_data_map.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 - 1) << 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] |= (out_size & 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;
+
+  /* Insert ADTS header */
+  gst_buffer_fill (out_buf, out_offset, adts_header, 7);
+  out_offset += 7;
+
+  gst_buffer_map (buf, &buf_map, GST_MAP_READ);
+
+  /* Now copy complete frame */
+  gst_buffer_fill (out_buf, out_offset, buf_map.data, buf_map.size);
+
+  gst_buffer_unmap (data->codec_data, &codec_data_map);
+  gst_buffer_unmap (buf, &buf_map);
+
+  return out_buf;
+}