path: root/src/enctest.cpp

/* ------------------------------------------------------------------
 * Copyright (C) 2011 Martin Storsjo
 * Copyright (C) 2013,2014 Matthias P. Braendli
 *
 * Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
 * express or implied.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 * -------------------------------------------------------------------
 */

#include "config.h"
#include "AlsaInput.h"
#include "FileInput.h"
#include "JackInput.h"
#include "SampleQueue.h"
#include "zmq.hpp"

extern "C" {
#include "encryption.h"
#include "utils.h"
#include "wavreader.h"
}

#include <string>
#include <getopt.h>
#include <cstdio>
#include <stdint.h>
#include <time.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/ioctl.h>

#include "libAACenc/include/aacenc_lib.h"

extern "C" {
#include <fec.h>
}

using namespace std;

void usage(const char* name) {
    fprintf(stderr,
    "dabplus-enc %s is a HE-AACv2 encoder for DAB+\n"
    "based on fdk-aac-dabplus that can read from"
    "JACK, ALSA or a file source\n"
    "and encode to a ZeroMQ output for ODR-DabMux.\n"
    "\n"
    "This is a test tool\n"
    "\nUsage:\n"
    "%s (-i file|-d alsa_device) [OPTION...]\n",
#if defined(GITVERSION)
    GITVERSION
#else
    PACKAGE_VERSION
#endif
    , name);
    fprintf(stderr,
    "   For the alsa input:\n"
    "     -d, --device=alsa_device             Set ALSA input device (default: \"default\").\n"
    "     -D, --drift-comp                     Enable ALSA sound card drift compensation.\n"
    "   For the file input:\n"
    "     -i, --input=FILENAME                 Input filename (default: stdin).\n"
    "     -f, --format={ wav, raw }            Set input file format (default: wav).\n"
    "         --fifo-silence                   Input file is fifo and encoder generates silence when fifo is empty. Ignore EOF.\n"
    "   For the JACK input:\n"
#if HAVE_JACK
    "     -j, --jack=name                      Enable JACK input, and define our name\n"
#else
    "     The JACK input was disabled at compile-time\n"
#endif
    "   Encoder parameters:\n"
    "     -b, --bitrate={ 8, 16, ..., 192 }    Output bitrate in kbps. Must be a multiple of 8.\n"
    "     -A, --no-afterburner                 Disable AAC encoder quality increaser.\n"
    "     -c, --channels={ 1, 2 }              Nb of input channels (default: 2).\n"
    "     -r, --rate={ 32000, 48000 }          Input sample rate (default: 48000).\n"
    "         --aaclc                          Force the usage of AAC-LC (no SBR, no PS)\n"
    "         --sbr                            Force the usage of SBR\n"
    "     -g, --granule-length={960, 1024}     Set the granule length\n"
    //"         --ps                             Force the usage of PS\n"
    "   Output and pad parameters:\n"
    "     -o, --output=URI                     Output zmq uri. (e.g. 'tcp://localhost:9000')\n"
    "                                     -or- Output file uri. (e.g. 'file.dabp')\n"
    "                                     -or- a single dash '-' to denote stdout\n"
    "     -k, --secret-key=FILE                Enable ZMQ encryption with the given secret key.\n"
    "     -p, --pad=BYTES                      Set PAD size in bytes.\n"
    "     -P, --pad-fifo=FILENAME              Set PAD data input fifo name"
    "                                          (default: /tmp/pad.fifo).\n"
    "     -l, --level                          Show peak audio level indication.\n"
    "     -s, --silence=TIMEOUT                Abort encoding after TIMEOUT seconds of silence.\n"
    "\n"
    "Only the tcp:// zeromq transport has been tested until now,\n"
    " but epgm:// and pgm:// are also accepted\n"
    );

}

int prepare_aac_encoder(
        HANDLE_AACENCODER *encoder,
        int subchannel_index,
        int channels,
        int sample_rate,
        int afterburner,
        int *aot,
        int granule_length)
{
    HANDLE_AACENCODER handle = *encoder;

    CHANNEL_MODE mode;
    switch (channels) {
        case 1: mode = MODE_1; break;
        case 2: mode = MODE_2; break;
        default:
                fprintf(stderr, "Unsupported channels number %d\n", channels);
                return 1;
    }


    if (aacEncOpen(&handle, 0x01|0x02|0x04, channels) != AACENC_OK) {
        fprintf(stderr, "Unable to open encoder\n");
        return 1;
    }

    *encoder = handle;

    fprintf(stderr, "Using %d subchannels. AAC type: %s. channels=%d, sample_rate=%d\n",
            subchannel_index,
            *aot == AOT_DABPLUS_PS ? "HE-AAC v2" :
            *aot == AOT_DABPLUS_SBR ? "HE-AAC" :
            *aot == AOT_DABPLUS_AAC_LC ? "AAC-LC" :
            *aot == AOT_SBR ? "AAC Non-DAB+ SBR" :
            *aot == AOT_AAC_LC ? "AAC Non-DAB+ LC" : "?",
            channels, sample_rate);

    if (aacEncoder_SetParam(handle, AACENC_AOT, *aot) != AACENC_OK) {
        fprintf(stderr, "Unable to set the AOT\n");
        return 1;
    }
    if (aacEncoder_SetParam(handle, AACENC_SAMPLERATE, sample_rate) != AACENC_OK) {
        fprintf(stderr, "Unable to set the sample rate\n");
        return 1;
    }
    if (aacEncoder_SetParam(handle, AACENC_CHANNELMODE, mode) != AACENC_OK) {
        fprintf(stderr, "Unable to set the channel mode\n");
        return 1;
    }
    if (aacEncoder_SetParam(handle, AACENC_CHANNELORDER, 1) != AACENC_OK) {
        fprintf(stderr, "Unable to set the wav channel order\n");
        return 1;
    }
    if (aacEncoder_SetParam(handle, AACENC_GRANULE_LENGTH, granule_length) != AACENC_OK) {
        fprintf(stderr, "Unable to set the granule length\n");
        return 1;
    }

    if (aacEncoder_SetParam(handle, AACENC_TRANSMUX, TT_MP4_ADTS) != AACENC_OK) {
        fprintf(stderr, "Unable to set the ADTS format\n");
        return 1;
    }

    /*if (aacEncoder_SetParam(handle, AACENC_BITRATEMODE, AACENC_BR_MODE_SFR)
     * != AACENC_OK) {
        fprintf(stderr, "Unable to set the bitrate mode\n");
        return 1;
    }*/


    fprintf(stderr, "AAC bitrate set to: %d\n", subchannel_index*8000);
    if (aacEncoder_SetParam(handle, AACENC_BITRATE, subchannel_index*8000) != AACENC_OK) {
        fprintf(stderr, "Unable to set the bitrate\n");
        return 1;
    }
    if (aacEncoder_SetParam(handle, AACENC_AFTERBURNER, afterburner) != AACENC_OK) {
        fprintf(stderr, "Unable to set the afterburner mode\n");
        return 1;
    }
    if (!afterburner) {
        fprintf(stderr, "Warning: Afterburned disabled!\n");
    }
    if (aacEncEncode(handle, NULL, NULL, NULL, NULL) != AACENC_OK) {
        fprintf(stderr, "Unable to initialize the encoder\n");
        return 1;
    }
    return 0;
}

#define no_argument 0
#define required_argument 1
#define optional_argument 2

#define STATUS_PAD_INSERTED 0x1
#define STATUS_OVERRUN 0x2
#define STATUS_UNDERRUN 0x4

int main(int argc, char *argv[])
{
    int subchannel_index = 8; //64kbps subchannel
    int ch=0;

    // For the ALSA input
    const char *alsa_device = NULL;

    // For the file input
    const char *infile = NULL;
    int raw_input = 0;

    // For the file output
    FILE *out_fh = NULL;

    const char *jack_name = NULL;

    const char *outuri = NULL;
    int sample_rate=48000, channels=2;
    int granule_length = 1024;
    void *rs_handler = NULL;
    bool afterburner = true;
    bool inFifoSilence = false;
    bool drift_compensation = false;
    AACENC_InfoStruct info = { 0 };
    int aot = AOT_NONE;

    /* Keep track of peaks */
    int peak_left  = 0;
    int peak_right = 0;

    /* On silence, die after the silence_timeout expires */
    bool die_on_silence = false;
    int silence_timeout = 0;
    int measured_silence_ms = 0;

    /* For MOT Slideshow and DLS insertion */
    const char* pad_fifo = "/tmp/pad.fifo";
    int pad_fd;
    unsigned char pad_buf[128];
    int padlen = 0;

    /* Encoder status, see the above STATUS macros */
    int status = 0;

    /* Whether to show the 'sox'-like measurement */
    int show_level = 0;

    /* Data for ZMQ CURVE authentication */
    char* keyfile = NULL;
    char secretkey[CURVE_KEYLEN+1];

    const struct option longopts[] = {
        {"bitrate",        required_argument,  0, 'b'},
        {"channels",       required_argument,  0, 'c'},
        {"device",         required_argument,  0, 'd'},
        {"format",         required_argument,  0, 'f'},
        {"granule_length", required_argument,  0, 'g'},
        {"input",          required_argument,  0, 'i'},
        {"jack",           required_argument,  0, 'j'},
        {"output",         required_argument,  0, 'o'},
        {"pad",            required_argument,  0, 'p'},
        {"pad-fifo",       required_argument,  0, 'P'},
        {"rate",           required_argument,  0, 'r'},
        {"silence",        required_argument,  0, 's'},
        {"secret-key",     required_argument,  0, 'k'},
        {"no-afterburner", no_argument,        0, 'A'},
        {"afterburner",    no_argument,        0, 'a'},
        {"drift-comp",     no_argument,        0, 'D'},
        {"help",           no_argument,        0, 'h'},
        {"level",          no_argument,        0, 'l'},
        {"aaclc",          no_argument,        0,  0 },
        {"sbr",            no_argument,        0,  1 },
        {"ps",             no_argument,        0,  2 },
        {"fifo-silence",   no_argument,        0,  3 },
        {0, 0, 0, 0},
    };

    fprintf(stderr,
            "Welcome to %s %s, compiled at %s, %s",
            PACKAGE_NAME,
#if defined(GITVERSION)
            GITVERSION,
#else
            PACKAGE_VERSION,
#endif
            __DATE__, __TIME__);
    fprintf(stderr, "\n");
    fprintf(stderr, "  http://opendigitalradio.org\n\n");


    if (argc < 2) {
        usage(argv[0]);
        return 1;
    }

    int index;
    while(ch != -1) {
        ch = getopt_long(argc, argv, "aAhDlb:c:f:g:i:j:k:o:r:d:p:P:s:", longopts, &index);
        switch (ch) {
        case 0: // AAC-LC
            aot = AOT_AAC_LC;
            break;
        case 1: // SBR
            aot = AOT_SBR;
            break;
        case 3: // FIFO SILENCE
            inFifoSilence = true;
            break;
        case 'a':
            fprintf(stderr, "Warning, -a option does not exist anymore!\n");
            break;
        case 'A':
            afterburner = false;
            break;
        case 'b':
            subchannel_index = atoi(optarg) / 8;
            break;
        case 'c':
            channels = atoi(optarg);
            break;
        case 'd':
            alsa_device = optarg;
            break;
        case 'D':
            drift_compensation = true;
            break;
        case 'f':
            if(strcmp(optarg, "raw")==0) {
                raw_input = 1;
            } else if(strcmp(optarg, "wav")!=0)
                usage(argv[0]);
            break;
        case 'g':
            granule_length = atoi(optarg);
            break;
        case 'i':
            infile = optarg;
            break;
        case 'j':
#if HAVE_JACK
            jack_name = optarg;
#else
            fprintf(stderr, "JACK disabled at compile time!\n");
            return 1;
#endif
            break;
        case 'k':
            keyfile = optarg;
            break;
        case 'l':
            show_level = 1;
            break;
        case 'o':
            outuri = optarg;
            break;
        case 'p':
            padlen = atoi(optarg);
            break;
        case 'P':
            pad_fifo = optarg;
            break;
        case 'r':
            sample_rate = atoi(optarg);
            break;
        case 's':
            silence_timeout = atoi(optarg);
            if (silence_timeout > 0 && silence_timeout < 3600*24*30) {
                die_on_silence = true;
            }
            else {
                fprintf(stderr, "Invalid silence timeout (%d) given!\n");
                return 1;
            }

            break;
        case '?':
        case 'h':
            usage(argv[0]);
            return 1;
        }
    }

    if (alsa_device && infile && jack_name) {
        fprintf(stderr, "You must define only one possible input, not several!\n");
        return 1;
    }

    if (subchannel_index < 1 || subchannel_index > 24) {
        fprintf(stderr, "Bad subchannel index: %d, must be between 1 and 24. Try other bitrate.\n",
                subchannel_index);
        return 1;
    }

    if ( ! (sample_rate == 32000 || sample_rate == 48000)) {
        fprintf(stderr, "Invalid sample rate. Possible values are: 32000, 48000.\n");
        return 1;
    }

    zmq::context_t zmq_ctx;
    zmq::socket_t zmq_sock(zmq_ctx, ZMQ_PUB);

    if (outuri) {
        if (strcmp(outuri, "-") == 0) {
            out_fh = stdout;
        }
        else if ((strncmp(outuri, "tcp://", 6) == 0) ||
                (strncmp(outuri, "pgm://", 6) == 0) ||
                (strncmp(outuri, "epgm://", 7) == 0)) {
            if (keyfile) {
                fprintf(stderr, "Enabling encryption\n");

                int rc = readkey(keyfile, secretkey);
                if (rc) {
                    fprintf(stderr, "Error reading secret key\n");
                    return 2;
                }

                const int yes = 1;
                zmq_sock.setsockopt(ZMQ_CURVE_SERVER,
                        &yes, sizeof(yes));

                zmq_sock.setsockopt(ZMQ_CURVE_SECRETKEY,
                        secretkey, CURVE_KEYLEN);
            }
            zmq_sock.connect(outuri);
        }
        else { // We assume it's a file name
            out_fh = fopen(outuri, "wb");

            if (!out_fh) {
                fprintf(stderr, "Can't open output file!\n");
                return 1;
            }
        }
    }
    else {
        fprintf(stderr, "Output URI not defined\n");
        return 1;
    }

    if (padlen != 0) {
        int flags;
        if (mkfifo(pad_fifo, S_IWUSR | S_IRUSR | S_IRGRP | S_IROTH) != 0) {
            if (errno != EEXIST) {
                fprintf(stderr, "Can't create pad file: %d!\n", errno);
                return 1;
            }
        }
        pad_fd = open(pad_fifo, O_RDONLY | O_NONBLOCK);
        if (pad_fd == -1) {
            fprintf(stderr, "Can't open pad file!\n");
            return 1;
        }
        flags = fcntl(pad_fd, F_GETFL, 0);
        if (fcntl(pad_fd, F_SETFL, flags | O_NONBLOCK)) {
            fprintf(stderr, "Can't set non-blocking mode in pad file!\n");
            return 1;
        }
    }


    HANDLE_AACENCODER encoder;

    if (prepare_aac_encoder(&encoder, subchannel_index, channels,
                sample_rate, afterburner, &aot, granule_length) != 0) {
        fprintf(stderr, "Encoder preparation failed\n");
        return 1;
    }

    /* We assume that we need to call the encoder
     * enc_calls_per_output before it gives us one encoded audio
     * frame. This information is used when the alsa drift compensation
     * is active
     */
    const int enc_calls_per_output =
        (aot == AOT_DABPLUS_AAC_LC) ? sample_rate / 8000 : sample_rate / 16000;


    if (aacEncInfo(encoder, &info) != AACENC_OK) {
        fprintf(stderr, "Unable to get the encoder info\n");
        return 1;
    }

    // Each DAB+ frame will need input_size audio bytes
    const int input_size = channels * BYTES_PER_SAMPLE * info.frameLength;
    fprintf(stderr, "DAB+ Encoding: framelen=%d (%dB)\n",
            info.frameLength,
            input_size);

    uint8_t input_buf[input_size];

    int max_size = 2*input_size + NUM_SAMPLES_PER_CALL;

    SampleQueue<uint8_t> queue(BYTES_PER_SAMPLE, channels, max_size);

    /* symsize=8, gfpoly=0x11d, fcr=0, prim=1, nroots=10, pad=135 */
    rs_handler = init_rs_char(8, 0x11d, 0, 1, 10, 135);
    if (rs_handler == NULL) {
        perror("init_rs_char failed");
        return 1;
    }

    /* No input defined ? default to alsa "default" */
    if (!alsa_device) {
        alsa_device = "default";
    }

    // We'll use one of the tree possible inputs
    AlsaInputThreaded alsa_in_threaded(alsa_device, channels, sample_rate, queue);
    AlsaInputDirect   alsa_in_direct(alsa_device, channels, sample_rate);
    FileInput         file_in(infile, raw_input, sample_rate);
#if HAVE_JACK
    JackInput         jack_in(jack_name, channels, sample_rate, queue);
#endif

    if (infile) {
        if (file_in.prepare() != 0) {
            fprintf(stderr, "File input preparation failed\n");
            return 1;
        }
    }
#if HAVE_JACK
    else if (jack_name) {
        if (jack_in.prepare() != 0) {
            fprintf(stderr, "JACK preparation failed\n");
            return 1;
        }
    }
#endif
    else if (drift_compensation) {
        if (alsa_in_threaded.prepare() != 0) {
            fprintf(stderr, "Alsa preparation failed\n");
            return 1;
        }

        fprintf(stderr, "Start ALSA capture thread\n");
        alsa_in_threaded.start();
    }
    else {
        if (alsa_in_direct.prepare() != 0) {
            fprintf(stderr, "Alsa preparation failed\n");
            return 1;
        }
    }

    int outbuf_size = subchannel_index*120;
    uint8_t zmqframebuf[ZMQ_HEADER_SIZE + 24*120];
    zmq_frame_header_t *zmq_frame_header = (zmq_frame_header_t*)zmqframebuf;

    uint8_t outbuf[24*120];

    if(outbuf_size % 5 != 0) {
        fprintf(stderr, "(outbuf_size mod 5) = %d\n", outbuf_size % 5);
    }

    fprintf(stderr, "Starting encoding\n");

    int retval = 0;
    int send_error_count = 0;
    struct timespec tp_next;
    clock_gettime(CLOCK_MONOTONIC, &tp_next);

    int calls = 0; // for checking
    while (1) {
        int in_identifier[] = {IN_AUDIO_DATA, IN_ANCILLRY_DATA};
        int out_identifier = OUT_BITSTREAM_DATA;

        AACENC_BufDesc in_buf = { 0 }, out_buf = { 0 };
        AACENC_InArgs in_args = { 0 };
        AACENC_OutArgs out_args = { 0 };
        void *in_ptr[2], *out_ptr;
        int in_size[2], in_elem_size[2];
        int out_size, out_elem_size;


        // -------------- wait the right amount of time
        if (drift_compensation || jack_name) {
            struct timespec tp_now;
            clock_gettime(CLOCK_MONOTONIC, &tp_now);

            unsigned long time_now  = (1000000000ul * tp_now.tv_sec) +
                tp_now.tv_nsec;
            unsigned long time_next = (1000000000ul * tp_next.tv_sec) +
                tp_next.tv_nsec;

            const unsigned long dabplus_superframe_nsec = 120000000ul;

            const unsigned long wait_time =
                dabplus_superframe_nsec / enc_calls_per_output;

            unsigned long waiting = wait_time - (time_now - time_next);
            if ((time_now - time_next) < wait_time) {
                //printf("Sleep %zuus\n", waiting / 1000);
                usleep(waiting / 1000);
            }

            // Move our time_counter into the future, for
            // the next frame.
            tp_next.tv_nsec += wait_time;
            if (tp_next.tv_nsec >  1000000000L) {
                tp_next.tv_nsec -= 1000000000L;
                tp_next.tv_sec  += 1;
            }
        }

        // --------------- Read data from the PAD fifo
        int ret;
        if (padlen != 0) {
            ret = read(pad_fd, pad_buf, padlen);
        }
        else {
            ret = 0;
        }


        if(ret < 0 && errno == EAGAIN) {
            // If this condition passes, there is no data to be read
            in_buf.numBufs = 1;    // Samples;
        }
        else if(ret >= 0) {
            // Otherwise, you're good to go and buffer should contain "count" bytes.
            in_buf.numBufs = 2;    // Samples + Data;
            if (ret > 0)
                status |= STATUS_PAD_INSERTED;
        }
        else {
            // Some other error occurred during read.
            fprintf(stderr, "Unable to read from PAD!\n");
                        break;
        }

        // -------------- Read Data
        memset(outbuf, 0x00, outbuf_size);
        memset(input_buf, 0x00, input_size);

        ssize_t read;
        if (infile) {
            read = file_in.read(input_buf, input_size);
            if (read < 0) {
                break;
            }
            else if (read != input_size) {
                if (inFifoSilence && file_in.eof()) {
                    memset(input_buf, 0, input_size);
                    read = input_size;
                    usleep((long)input_size * 1000000 /
                            (BYTES_PER_SAMPLE * channels * sample_rate));
                }
                else {
                    fprintf(stderr, "Short file read !\n");
                    break;
                }
            }
        }
        else if (drift_compensation || jack_name) {
            if (drift_compensation && alsa_in_threaded.fault_detected()) {
                fprintf(stderr, "Detected fault in alsa input!\n");
                retval = 5;
                break;
            }

            size_t overruns;
            read = queue.pop(input_buf, input_size, &overruns); // returns bytes

            if (read != input_size) {
                status |= STATUS_UNDERRUN;
            }

            if (overruns) {
                status |= STATUS_OVERRUN;
            }
        }
        else {
            read = alsa_in_direct.read(input_buf, input_size);
            if (read < 0) {
                break;
            }
            else if (read != input_size) {
                fprintf(stderr, "Short alsa read !\n");
            }
        }

        for (int i = 0; i < read; i+=4) {
            int16_t l = input_buf[i] | (input_buf[i+1] << 8);
            int16_t r = input_buf[i+2] | (input_buf[i+3] << 8);
            peak_left  = MAX(peak_left,  l);
            peak_right = MAX(peak_right, r);
        }

        /* Silence detection */
        if (die_on_silence && MAX(peak_left, peak_right) == 0) {
            const unsigned int dabplus_superframe_msec = 120ul;
            const unsigned int frame_time_msec =
                dabplus_superframe_msec / enc_calls_per_output;

            measured_silence_ms += frame_time_msec;

            if (measured_silence_ms > 1000*silence_timeout) {
                fprintf(stderr, "Silence detected for %d seconds, aborting.\n",
                        silence_timeout);
                retval = 2;
                break;
            }
        }
        else {
            measured_silence_ms = 0;
        }

        // -------------- AAC Encoding

        int calculated_padlen = ret > 0 ? padlen : 0;


        in_ptr[0] = input_buf;
        in_ptr[1] = pad_buf;
        in_size[0] = read;
        in_size[1] = calculated_padlen;
        in_elem_size[0] = BYTES_PER_SAMPLE;
        in_elem_size[1] = sizeof(uint8_t);
        in_args.numInSamples = input_size/BYTES_PER_SAMPLE;
        in_args.numAncBytes = calculated_padlen;

        in_buf.bufs = (void**)&in_ptr;
        in_buf.bufferIdentifiers = in_identifier;
        in_buf.bufSizes = in_size;
        in_buf.bufElSizes = in_elem_size;

        out_ptr = outbuf;
        out_size = sizeof(outbuf);
        out_elem_size = 1;
        out_buf.numBufs = 1;
        out_buf.bufs = &out_ptr;
        out_buf.bufferIdentifiers = &out_identifier;
        out_buf.bufSizes = &out_size;
        out_buf.bufElSizes = &out_elem_size;

        AACENC_ERROR err;
        if ((err = aacEncEncode(encoder, &in_buf, &out_buf, &in_args, &out_args))
                != AACENC_OK) {
            if (err == AACENC_ENCODE_EOF) {
                fprintf(stderr, "encoder error: EOF reached\n");
                break;
            }
            fprintf(stderr, "Encoding failed (%d)\n", err);
            retval = 3;
            break;
        }
        calls++;

        /* Check if the encoder has generated output data */
        if (out_args.numOutBytes != 0)
        {
#if 0
            // Our timing code depends on this
            if (calls != enc_calls_per_output) {
                fprintf(stderr, "INTERNAL ERROR! calls=%d"
                        ", expected %d\n",
                        calls, enc_calls_per_output);
            }
            calls = 0;

            // ----------- RS encoding
            int row, col;
            unsigned char buf_to_rs_enc[110];
            unsigned char rs_enc[10];
            for(row=0; row < subchannel_index; row++) {
                for(col=0;col < 110; col++) {
                    buf_to_rs_enc[col] = outbuf[subchannel_index * col + row];
                }

                encode_rs_char(rs_handler, buf_to_rs_enc, rs_enc);

                for(col=110; col<120; col++) {
                    outbuf[subchannel_index * col + row] = rs_enc[col-110];
                    assert(subchannel_index * col + row < outbuf_size);
                }
            }
#endif

            if (out_fh) {
                fwrite(outbuf, 1, out_args.numOutBytes, out_fh);
            }
            else {
                // ------------ ZeroMQ transmit
                try {
                    zmq_frame_header->version = 1;
                    zmq_frame_header->encoder = ZMQ_ENCODER_FDK;
                    zmq_frame_header->datasize = out_args.numOutBytes;
                    zmq_frame_header->audiolevel_left = peak_left;
                    zmq_frame_header->audiolevel_right = peak_right;

                    assert(ZMQ_FRAME_SIZE(zmq_frame_header) <= NUMOF(zmqframebuf));

                    memcpy(ZMQ_FRAME_DATA(zmq_frame_header),
                            outbuf, out_args.numOutBytes);

                    zmq_sock.send(zmqframebuf, ZMQ_FRAME_SIZE(zmq_frame_header),
                            ZMQ_DONTWAIT);
                }
                catch (zmq::error_t& e) {
                    fprintf(stderr, "ZeroMQ send error !\n");
                    send_error_count ++;
                }

                if (send_error_count > 10)
                {
                    fprintf(stderr, "ZeroMQ send failed ten times, aborting!\n");
                    retval = 4;
                    break;
                }
            }

            if (show_level) {
                if (channels == 1) {
                    fprintf(stderr, "\rIn: [%-6s] %1s %1s %1s",
                            level(1, MAX(peak_right, peak_left)),
                            status & STATUS_PAD_INSERTED ? "P" : " ",
                            status & STATUS_UNDERRUN ? "U" : " ",
                            status & STATUS_OVERRUN ? "O" : " ");
                }
                else if (channels == 2) {
                    fprintf(stderr, "\rIn: [%6s|%-6s] %1s %1s %1s",
                            level(0, peak_left),
                            level(1, peak_right),
                            status & STATUS_PAD_INSERTED ? "P" : " ",
                            status & STATUS_UNDERRUN ? "U" : " ",
                            status & STATUS_OVERRUN ? "O" : " ");
                }

                peak_right = 0;
                peak_left = 0;
            }
            else {
                if (status & STATUS_OVERRUN) {
                    fprintf(stderr, "O");
                }

                if (status & STATUS_UNDERRUN) {
                    fprintf(stderr, "U");
                }

            }

            status = 0;
        }

        fflush(stdout);
    }
    fprintf(stderr, "\n");

    if (out_fh) {
        fclose(out_fh);
    }

    zmq_sock.close();
    free_rs_char(rs_handler);

    aacEncClose(&encoder);

    return retval;
}