Etisnoop add faad_decoder

1 files changed, 86 insertions, 0 deletions

diff --git a/faad_decoder.h b/faad_decoder.h
new file mode 100644
index 0000000..10e9717
--- /dev/null
+++ b/faad_decoder.h
@@ -0,0 +1,86 @@
+/*
+    Copyright (C) 2014 Matthias P. Braendli (http://www.opendigitalradio.org)
+
+    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 3 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, see <http://www.gnu.org/licenses/>.
+
+    faad_decoder.h
+        Use libfaad to decode the AAC content of the DAB+ subchannel
+
+    Authors:
+         Matthias P. Braendli <matthias@mpb.li>
+*/
+
+#include <stdio.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+#include <string>
+#include <sstream>
+#include <vector>
+#include <neaacdec.h>
+
+#ifndef __FAAD_DECODER_H_
+#define __FAAD_DECODER_H_
+
+struct adts_fixed_header {
+    unsigned int syncword           :12;
+    unsigned int id                 :1;
+    unsigned int layer              :2;
+    unsigned int protection_absent  :1;
+    unsigned int profile_objecttype :2;
+    unsigned int sampling_freq_idx  :4;
+    unsigned int private_bit        :1;
+    unsigned int channel_conf       :3;
+    unsigned int original_copy      :1;
+    unsigned int home               :1;
+};
+
+struct adts_variable_header {
+    unsigned int copyright_id_bit       :1;
+    unsigned int copyright_id_start     :1;
+    unsigned int aac_frame_length       :13;
+    unsigned int adts_buffer_fullness   :11;
+    unsigned int no_raw_data_blocks     :2;
+};
+
+class FaadDecoder
+{
+    public:
+        FaadDecoder();
+
+        FaadDecoder(std::string filename, bool ps_flag, bool aac_channel_mode,
+                bool dac_rate, bool sbr_flag, int mpeg_surround_config);
+
+        size_t Decode(std::vector<std::vector<uint8_t> > aus);
+
+        ~FaadDecoder(void);
+
+
+    private:
+        std::string m_filename;
+        FILE* m_fd;
+
+        /* Data needed for FAAD */
+        bool m_ps_flag;
+        bool m_aac_channel_mode;
+        bool m_dac_rate;
+        bool m_sbr_flag;
+        int  m_mpeg_surround_config;
+
+        bool m_initialised;
+        NeAACDecHandle m_decoder;
+};
+
+#endif
+