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-rw-r--r--etisnoop/faad_decoder.cpp231
1 files changed, 0 insertions, 231 deletions
diff --git a/etisnoop/faad_decoder.cpp b/etisnoop/faad_decoder.cpp
deleted file mode 100644
index f489c1d..0000000
--- a/etisnoop/faad_decoder.cpp
+++ /dev/null
@@ -1,231 +0,0 @@
-/*
- 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.cpp
- Use libfaad to decode the AAC content of the DAB+ subchannel
-
- Authors:
- Matthias P. Braendli <matthias@mpb.li>
-*/
-
-#include "faad_decoder.h"
-#include "wavfile.h"
-#include "utils.h"
-#include <stdio.h>
-#include <stdint.h>
-#include <stdlib.h>
-#include <string.h>
-#include <cassert>
-#include <string>
-#include <sstream>
-#include <vector>
-
-using namespace std;
-
-FaadDecoder::FaadDecoder() :
- m_data_len(0),
- m_fd(NULL),
- m_aac(NULL),
- m_initialised(false)
-{
-}
-
-void FaadDecoder::open(string filename, bool ps_flag, bool aac_channel_mode,
- bool dac_rate, bool sbr_flag, int mpeg_surround_config)
-{
- m_filename = filename;
- m_ps_flag = ps_flag;
- m_aac_channel_mode = aac_channel_mode;
- m_dac_rate = dac_rate;
- m_sbr_flag = sbr_flag;
- m_mpeg_surround_config = mpeg_surround_config;
-
- stringstream ss;
- ss << filename << ".aac";
-
- m_aac = fopen(ss.str().c_str(), "w");
-}
-
-bool FaadDecoder::decode(vector<vector<uint8_t> > aus)
-{
- /* ADTS header creation taken from SDR-J */
- adts_fixed_header fh;
- adts_variable_header vh;
-
- fh.syncword = 0xfff;
- fh.id = 0;
- fh.layer = 0;
- fh.protection_absent = 1;
- fh.profile_objecttype = 0; // aac main - 1
- fh.private_bit = 0; // ignored when decoding
- fh.original_copy = 0;
- fh.home = 0;
- vh.copyright_id_bit = 0;
- vh.copyright_id_start = 0;
- vh.adts_buffer_fullness = 1999; // ? according to OpenDab
- vh.no_raw_data_blocks = 0;
-
- uint8_t d_header[10];
- d_header[0] = fh.syncword >> 4;
- d_header[1] = (fh.syncword & 0xf) << 4;
- d_header[1] |= fh.id << 3;
- d_header[1] |= fh.layer << 1;
- d_header[1] |= fh.protection_absent;
- d_header[2] = fh.profile_objecttype << 6;
- // sampling frequency index filled in dynamically
- d_header[2] |= fh.private_bit << 1;
- // channel configuration filled in dynamically
- d_header[3] = fh.original_copy << 5;
- d_header[3] |= fh.home << 4;
- d_header[3] |= vh.copyright_id_bit << 3;
- d_header[3] |= vh.copyright_id_start << 2;
- // framelength filled in dynamically
- d_header[4] = 0;
- d_header[5] = vh.adts_buffer_fullness >> 6;
- d_header[6] = (vh.adts_buffer_fullness & 0x3f) << 2;
- d_header[6] |= vh.no_raw_data_blocks;
-
- if (!m_dac_rate && m_sbr_flag) fh.sampling_freq_idx = 8;
- // AAC core sampling rate 16 kHz
- else if (m_dac_rate && m_sbr_flag) fh.sampling_freq_idx = 6;
- // AAC core sampling rate 24 kHz
- else if (!m_dac_rate && !m_sbr_flag) fh.sampling_freq_idx = 5;
- // AAC core sampling rate 32 kHz
- else if (m_dac_rate && !m_sbr_flag) fh.sampling_freq_idx = 3;
- // AAC core sampling rate 48 kHz
-
- setBits (&d_header[2], fh.sampling_freq_idx, 2, 4);
-
- if (m_mpeg_surround_config == 0) {
- if (m_sbr_flag && !m_aac_channel_mode && m_ps_flag)
- fh.channel_conf = 2;
- else
- fh.channel_conf = 1 << (m_aac_channel_mode ? 1 : 0);
- }
- else if (m_mpeg_surround_config == 1) {
- fh.channel_conf = 6;
- }
- else {
- printf("Unrecognized mpeg surround config (ignored)\n");
- return false;
- }
-
- setBits (&d_header[2], fh.channel_conf, 7, 3);
-
- for (size_t au_ix = 0; au_ix < aus.size(); au_ix++) {
-
- vector<uint8_t>& au = aus[au_ix];
-
- uint8_t helpBuffer[960];
- memset(helpBuffer, 0, sizeof(helpBuffer));
-
- // Set length in header (header + au)
- vh.aac_frame_length = 7 + au.size();
- setBits(&d_header[3], vh.aac_frame_length, 6, 13);
-
- memcpy(helpBuffer, d_header, 7 * sizeof(uint8_t));
- memcpy(&helpBuffer[7],
- &au[0], au.size() * sizeof (uint8_t));
-
- fwrite(helpBuffer, 1, vh.aac_frame_length, m_aac);
-
- NeAACDecFrameInfo hInfo;
- int16_t* outBuffer;
-
- if (!m_initialised) {
- long unsigned samplerate;
- unsigned char channels;
-
- int len;
-
- if ((len = NeAACDecInit(m_faad_handle.decoder, helpBuffer,
- vh.aac_frame_length, &samplerate, &channels)) < 0)
- {
- /* If some error initializing occured, skip the file */
- printf("Error initializing decoder library (%d).\n",
- len);
- NeAACDecClose(m_faad_handle.decoder);
- return false;
- }
-
- m_initialised = true;
-
- outBuffer = (int16_t *)NeAACDecDecode(
- m_faad_handle.decoder, &hInfo,
- helpBuffer + len, vh.aac_frame_length - len );
- }
- else {
- outBuffer = (int16_t *)NeAACDecDecode(
- m_faad_handle.decoder, &hInfo,
- helpBuffer, vh.aac_frame_length );
- }
-
- assert(outBuffer != NULL);
-
- m_sample_rate = hInfo.samplerate;
- m_channels = hInfo.channels;
- size_t samples = hInfo.samples;
-
-#if 0
- printf("bytes consumed %d\n", (int)(hInfo.bytesconsumed));
- printf("samplerate = %d, samples = %zu, channels = %d,"
- " error = %d, sbr = %d\n", m_sample_rate, samples,
- m_channels, hInfo.error, hInfo.sbr);
- printf("header = %d\n", hInfo.header_type);
-#endif
-
- if (hInfo.error != 0) {
- printf("FAAD Warning: %s\n",
- faacDecGetErrorMessage(hInfo.error));
- return false;
- }
-
- if (m_fd == NULL) {
- stringstream ss;
- ss << m_filename << ".wav";
- m_fd = wavfile_open(ss.str().c_str(), m_sample_rate);
- }
-
- if (samples) {
- if (m_channels == 1) {
- int16_t *buffer = (int16_t *)alloca (2 * samples);
- size_t i;
- for (i = 0; i < samples; i ++) {
- buffer [2 * i] = ((int16_t *)outBuffer) [i];
- buffer [2 * i + 1] = buffer [2 * i];
- }
- wavfile_write(m_fd, buffer, 2*samples);
- }
- else if (m_channels == 2) {
- wavfile_write(m_fd, outBuffer, samples);
- }
- else {
- printf("Cannot handle %d channels\n", m_channels);
- }
- }
-
- }
- return true;
-}
-
-void FaadDecoder::close()
-{
- if (m_initialised) {
- wavfile_close(m_fd);
- }
-}
-
-
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