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-rw-r--r--src/AlsaDabplus.cpp374
-rw-r--r--src/AlsaInput.cpp139
-rw-r--r--src/AlsaInput.h89
-rw-r--r--src/SampleQueue.h123
-rw-r--r--src/zmq.hpp566
5 files changed, 1291 insertions, 0 deletions
diff --git a/src/AlsaDabplus.cpp b/src/AlsaDabplus.cpp
new file mode 100644
index 0000000..758d96e
--- /dev/null
+++ b/src/AlsaDabplus.cpp
@@ -0,0 +1,374 @@
+/* ------------------------------------------------------------------
+ * 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 "AlsaInput.h"
+#include "SampleQueue.h"
+#include "zmq.hpp"
+
+#include <string>
+#include <getopt.h>
+#include <cstdio>
+#include <stdint.h>
+#include <time.h>
+#include <unistd.h>
+
+#include "libAACenc/include/aacenc_lib.h"
+
+extern "C" {
+#include <fec.h>
+}
+
+using namespace std;
+
+void usage(const char* name) {
+ fprintf(stderr, "%s [OPTION...]\n", name);
+ fprintf(stderr,
+" -b, --bitrate={ 8, 16, ..., 192 } Output bitrate in kbps. Must be 8 multiple.\n"
+//" -d, --data=FILENAME Set data filename.\n"
+//" -g, --fs-bug Turn on FS bug mitigation.\n"
+//" -i, --input=FILENAME Input filename (default: stdin).\n"
+" -o, --output=URI Output zmq uri. (e.g. 'tcp://*:9000')\n"
+" -a, --afterburner Turn on AAC encoder quality increaser.\n"
+//" -m, --message Turn on AAC frame messages.\n"
+//" -p, --pad=BYTES Set PAD size in bytes.\n"
+//" -f, --format={ wav, raw } Set input file format (default: wav).\n"
+" -d, --device=alsa_device Set ALSA input device (default: \"default\").\n"
+" -c, --channels={ 1, 2 } Nb of input channels for raw input (default: 2).\n"
+" -r, --rate={ 32000, 48000 } Sample rate for raw input (default: 48000).\n"
+//" -t, --type=TYPE Set data type (dls|pad|packet|dg).\n"
+//" -v, --verbose=LEVEL Set verbosity level.\n"
+//" -V, --version Print version and exit.\n"
+//" --mi=[ 0, ... ] Set AAC frame messages interval in milliseconds.\n"
+//" --ma=[ 0, ... ] Set AAC frame messages attack time in milliseconds.\n"
+//" -l, --lp Set frame size to 1024 instead of 960.\n"
+"\n"
+"Only the tcp:// zeromq transport has been tested until now.\n"
+
+);
+
+}
+
+int prepare_aac_encoder(
+ HANDLE_AACENCODER *encoder,
+ int subchannel_index,
+ int channels,
+ int sample_rate,
+ int afterburner)
+{
+ HANDLE_AACENCODER handle = *encoder;
+
+ int aot = AOT_DABPLUS_AAC_LC;
+
+ 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;
+ }
+
+
+ if(channels == 2 && subchannel_index <= 6)
+ aot = AOT_DABPLUS_PS;
+ else if((channels == 1 && subchannel_index <= 8) || subchannel_index <= 10)
+ aot = AOT_DABPLUS_SBR;
+
+ fprintf(stderr, "Using %d subchannels. AAC type: %s%s%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" : "",
+ 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, 960) != AACENC_OK) {
+ fprintf(stderr, "Unable to set the granule length\n");
+ return 1;
+ }
+ if (aacEncoder_SetParam(handle, AACENC_TRANSMUX, TT_DABPLUS) != AACENC_OK) {
+ fprintf(stderr, "Unable to set the RAW transmux\n");
+ return 1;
+ }
+
+ /*if (aacEncoder_SetParam(handle, AACENC_BITRATEMODE, 7 *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 (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
+
+int main(int argc, char *argv[]) {
+ int subchannel_index = 8; //64kbps subchannel
+ int ch=0;
+ int err;
+ const char *alsa_device = "default";
+ const char *outuri = NULL;
+ int sample_rate=48000, channels=2;
+ const int bytes_per_sample = 2;
+ void *rs_handler = NULL;
+ int afterburner = 0;
+ AACENC_InfoStruct info = { 0 };
+
+ const struct option longopts[] = {
+ {"bitrate", required_argument, 0, 'b'},
+ {"output", required_argument, 0, 'o'},
+ {"device", required_argument, 0, 'd'},
+ {"rate", required_argument, 0, 'r'},
+ {"channels", required_argument, 0, 'c'},
+ {"afterburner", no_argument, 0, 'a'},
+ {"help", no_argument, 0, 'h'},
+ {0,0,0,0},
+ };
+
+ int index;
+ while(ch != -1) {
+ ch = getopt_long(argc, argv, "hab:c:o:r:d:", longopts, &index);
+ switch (ch) {
+ case 'd':
+ alsa_device = optarg;
+ break;
+ case 'a':
+ afterburner = 1;
+ break;
+ case 'b':
+ subchannel_index = atoi(optarg) / 8;
+ break;
+ case 'c':
+ channels = atoi(optarg);
+ break;
+ case 'r':
+ sample_rate = atoi(optarg);
+ break;
+ case 'o':
+ outuri = optarg;
+ break;
+ case '?':
+ case 'h':
+ usage(argv[0]);
+ return 1;
+ }
+ }
+
+ if(subchannel_index < 1 || subchannel_index > 24) {
+ fprintf(stderr, "Bad subchannels number: %d, try other bitrate.\n",
+ subchannel_index);
+ return 1;
+ }
+
+ fprintf(stderr, "Setting up ZeroMQ socket\n");
+ if (!outuri) {
+ fprintf(stderr, "ZeroMQ output URI not defined\n");
+ return 1;
+ }
+
+ zmq::context_t zmq_ctx;
+ zmq::socket_t zmq_sock(zmq_ctx, ZMQ_PUB);
+ zmq_sock.connect(outuri);
+
+ HANDLE_AACENCODER encoder;
+
+ if (prepare_aac_encoder(&encoder, subchannel_index, channels,
+ sample_rate, afterburner) != 0) {
+ fprintf(stderr, "Encoder preparation failed\n");
+ return 2;
+ }
+
+ if (aacEncInfo(encoder, &info) != AACENC_OK) {
+ fprintf(stderr, "Unable to get the encoder info\n");
+ return 1;
+ }
+
+ fprintf(stderr, "DAB+ Encoding: framelen=%d\n", info.frameLength);
+
+ // Each DAB+ frame will need input_size audio bytes
+ int input_size = channels * bytes_per_sample * info.frameLength;
+ uint8_t input_buf[input_size];
+
+ int max_size = input_size + NUM_SAMPLES_PER_CALL;
+
+ SampleQueue<uint8_t> queue(BYTES_PER_SAMPLE, channels, max_size);
+
+ AlsaInput alsa_in(alsa_device, channels, sample_rate, queue);
+
+ if (alsa_in.prepare() != 0) {
+ fprintf(stderr, "Alsa preparation failed\n");
+ return 1;
+ }
+
+ fprintf(stderr, "Start ALSA capture thread\n");
+ alsa_in.start();
+
+ fprintf(stderr, "Starting queue preroll\n");
+ // Preroll until queue full
+ while (queue.size() < input_size) {
+ usleep(1000);
+ }
+
+ int outbuf_size = subchannel_index*120;
+ uint8_t outbuf[20480];
+
+ if(outbuf_size % 5 != 0) {
+ fprintf(stderr, "(outbuf_size mod 5) = %d\n", outbuf_size % 5);
+ }
+
+ fprintf(stderr, "Starting encoding\n");
+
+ int send_error_count = 0;
+ struct timespec tp;
+ clock_gettime(CLOCK_MONOTONIC, &tp);
+
+ while (1) {
+ int in_identifier = IN_AUDIO_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, *out_ptr;
+ int in_size, in_elem_size;
+ int out_size, out_elem_size;
+
+ memset(outbuf, 0x00, outbuf_size);
+
+ int read = queue.pop(input_buf, input_size);
+
+ if (read != input_size) {
+ fprintf(stderr, "Short read\n");
+ }
+
+ // -------------- AAC Encoding
+
+ in_ptr = input_buf;
+ in_size = input_size;
+ in_elem_size = BYTES_PER_SAMPLE;
+ in_args.numInSamples = input_size;
+ in_buf.numBufs = 1;
+ in_buf.bufs = &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;
+
+ if ((err = aacEncEncode(encoder, &in_buf, &out_buf, &in_args, &out_args))
+ != AACENC_OK) {
+ if (err == AACENC_ENCODE_EOF)
+ break;
+ fprintf(stderr, "Encoding failed\n");
+ break;
+ }
+ if (out_args.numOutBytes == 0)
+ continue;
+
+ // ----------- 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);
+ }
+ }
+
+ // ------------ ZeroMQ transmit
+ try {
+ zmq_sock.send(outbuf, outbuf_size, 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");
+ break;
+ }
+
+ if (out_args.numOutBytes + row*10 == outbuf_size)
+ fprintf(stderr, ".");
+
+ // -------------- wait 120ms (one DAB+ superframe)
+
+ }
+
+ zmq_sock.close();
+ free_rs_char(rs_handler);
+
+ aacEncClose(&encoder);
+
+}
+
diff --git a/src/AlsaInput.cpp b/src/AlsaInput.cpp
new file mode 100644
index 0000000..fd1feec
--- /dev/null
+++ b/src/AlsaInput.cpp
@@ -0,0 +1,139 @@
+/* ------------------------------------------------------------------
+ * 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 <cstdio>
+#include <string>
+
+#include <alsa/asoundlib.h>
+
+#include "AlsaInput.h"
+#include <sys/time.h>
+
+using namespace std;
+
+int AlsaInput::prepare()
+{
+ int err;
+ snd_pcm_hw_params_t *hw_params;
+
+ fprintf(stderr, "Initialising ALSA...\n");
+
+ const int open_mode = 0; //|= SND_PCM_NONBLOCK;
+
+ if ((err = snd_pcm_open(&m_alsa_handle, m_alsa_dev.c_str(),
+ SND_PCM_STREAM_CAPTURE, open_mode)) < 0) {
+ fprintf (stderr, "cannot open audio device %s (%s)\n",
+ m_alsa_dev.c_str(), snd_strerror(err));
+ return 1;
+ }
+
+ if ((err = snd_pcm_hw_params_malloc(&hw_params)) < 0) {
+ fprintf (stderr, "cannot allocate hardware parameter structure (%s)\n",
+ snd_strerror(err));
+ return 1;
+ }
+
+ if ((err = snd_pcm_hw_params_any(m_alsa_handle, hw_params)) < 0) {
+ fprintf (stderr, "cannot initialize hardware parameter structure (%s)\n",
+ snd_strerror(err));
+ return 1;
+ }
+
+ if ((err = snd_pcm_hw_params_set_access(m_alsa_handle, hw_params,
+ SND_PCM_ACCESS_RW_INTERLEAVED)) < 0) {
+ fprintf (stderr, "cannot set access type (%s)\n",
+ snd_strerror(err));
+ return 1;
+ }
+
+ if ((err = snd_pcm_hw_params_set_format(m_alsa_handle, hw_params,
+ SND_PCM_FORMAT_S16_LE)) < 0) {
+ fprintf (stderr, "cannot set sample format (%s)\n",
+ snd_strerror(err));
+ return 1;
+ }
+
+ if ((err = snd_pcm_hw_params_set_rate_near(m_alsa_handle,
+ hw_params, &m_rate, 0)) < 0) {
+ fprintf (stderr, "cannot set sample rate (%s)\n",
+ snd_strerror(err));
+ return 1;
+ }
+
+ if ((err = snd_pcm_hw_params_set_channels(m_alsa_handle,
+ hw_params, m_channels)) < 0) {
+ fprintf (stderr, "cannot set channel count (%s)\n",
+ snd_strerror(err));
+ return 1;
+ }
+
+ if ((err = snd_pcm_hw_params(m_alsa_handle, hw_params)) < 0) {
+ fprintf (stderr, "cannot set parameters (%s)\n",
+ snd_strerror(err));
+ return 1;
+ }
+
+ snd_pcm_hw_params_free (hw_params);
+
+ if ((err = snd_pcm_prepare(m_alsa_handle)) < 0) {
+ fprintf (stderr, "cannot prepare audio interface for use (%s)\n",
+ snd_strerror(err));
+ return 1;
+ }
+
+ fprintf(stderr, "ALSA init done.\n");
+ return 0;
+}
+
+size_t AlsaInput::read(uint8_t* buf, snd_pcm_uframes_t length)
+{
+ int i;
+ int err;
+
+ err = snd_pcm_readi(m_alsa_handle, buf, length);
+
+ if (err != length) {
+ if (err < 0) {
+ fprintf (stderr, "read from audio interface failed (%s)\n",
+ snd_strerror(err));
+ }
+ else {
+ fprintf(stderr, "short alsa read: %d\n", err);
+ }
+ }
+
+ return err;
+}
+
+void AlsaInput::start()
+{
+ m_running = true;
+ m_thread = boost::thread(&AlsaInput::process, this);
+}
+
+void AlsaInput::process()
+{
+ uint8_t samplebuf[NUM_SAMPLES_PER_CALL * BYTES_PER_SAMPLE * m_channels];
+ while (m_running) {
+ size_t n = read(samplebuf, NUM_SAMPLES_PER_CALL);
+
+ m_queue.push(samplebuf, n);
+ }
+}
+
diff --git a/src/AlsaInput.h b/src/AlsaInput.h
new file mode 100644
index 0000000..c1e3e9b
--- /dev/null
+++ b/src/AlsaInput.h
@@ -0,0 +1,89 @@
+/* ------------------------------------------------------------------
+ * 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.
+ * -------------------------------------------------------------------
+ */
+
+#ifndef __ALSA_H_
+#define __ALSA_H_
+#include <cstdio>
+#include <string>
+
+#include <alsa/asoundlib.h>
+#include <boost/thread/thread.hpp>
+
+#include "SampleQueue.h"
+
+using namespace std;
+
+// 16 bits per sample is fine for now
+#define BYTES_PER_SAMPLE 2
+
+// How many samples we insert into the queue each call
+#define NUM_SAMPLES_PER_CALL 10 // 10 samples @ 32kHz = 3.125ms
+
+class AlsaInput
+{
+ public:
+ AlsaInput(const string& alsa_dev,
+ unsigned int channels,
+ unsigned int rate,
+ SampleQueue<uint8_t>& queue) :
+ m_running(false),
+ m_alsa_dev(alsa_dev),
+ m_channels(channels),
+ m_rate(rate),
+ m_queue(queue),
+ m_alsa_handle(NULL) { }
+
+ ~AlsaInput()
+ {
+ if (m_running) {
+ m_running = false;
+ m_thread.interrupt();
+ m_thread.join();
+ }
+
+ if (m_alsa_handle) {
+ snd_pcm_abort(m_alsa_handle);
+ m_alsa_handle = NULL;
+ }
+ }
+
+ int prepare();
+
+ void start();
+
+ private:
+ AlsaInput(const AlsaInput& other) : m_queue(other.m_queue) {}
+
+ size_t read(uint8_t* buf, snd_pcm_uframes_t length);
+ void process();
+
+ bool m_running;
+ boost::thread m_thread;
+ string m_alsa_dev;
+ unsigned int m_channels;
+ unsigned int m_rate;
+
+ SampleQueue<uint8_t>& m_queue;
+
+ snd_pcm_t *m_alsa_handle;
+
+};
+
+#endif
+
diff --git a/src/SampleQueue.h b/src/SampleQueue.h
new file mode 100644
index 0000000..d00b8f9
--- /dev/null
+++ b/src/SampleQueue.h
@@ -0,0 +1,123 @@
+/*
+ Copyright (C) 2013, 2014
+ Matthias P. Braendli, matthias.braendli@mpb.li
+
+ An implementation for a threadsafe queue using boost thread library
+ for audio samples.
+*/
+
+#ifndef _SAMPLE_QUEUE_H_
+#define _SAMPLE_QUEUE_H_
+
+#include <boost/thread.hpp>
+#include <queue>
+
+/* This queue is meant to be used by two threads. One producer
+ * that pushes elements into the queue, and one consumer that
+ * retrieves the elements.
+ *
+ * The queue can make the consumer block until enough elements
+ * are available.
+ */
+
+template<typename T>
+class SampleQueue
+{
+public:
+ SampleQueue(unsigned int bytes_per_sample,
+ unsigned int channels,
+ size_t max_size) :
+ m_bytes_per_sample(bytes_per_sample),
+ m_channels(channels), m_max_size(max_size) {}
+
+
+ /* Push a bunch of samples into the buffer */
+ size_t push(const T *val, size_t len)
+ {
+ boost::mutex::scoped_lock lock(m_mutex);
+
+ if (m_queue.size() >= m_max_size) {
+ return 0;
+ }
+
+ for (size_t i = 0; i < len; i++) {
+ m_queue.push_back(val[i]);
+ }
+
+ size_t new_size = m_queue.size();
+ lock.unlock();
+
+ //m_condition_variable.notify_one();
+
+ return new_size;
+ }
+
+ size_t size() const
+ {
+ boost::mutex::scoped_lock lock(m_mutex);
+ return m_queue.size();
+ }
+
+ /* Get len elements, place them into the buf array
+ * Returns the number of elements it was able to take
+ * from the queue
+ */
+ size_t pop(T* buf, size_t len)
+ {
+ boost::mutex::scoped_lock lock(m_mutex);
+
+ size_t ret = 0;
+
+ if (m_queue.size() < len) {
+ size_t i;
+ for (i = 0; i < m_queue.size(); i++) {
+ buf[i] = m_queue[i];
+ }
+
+ ret = i;
+
+ for (; i < len; i++) {
+ buf[i] = 0;
+ }
+
+ m_queue.resize(0);
+ }
+ else {
+ for (size_t i = 0; i < len; i++) {
+ buf[i] = m_queue[i];
+ }
+
+ ret = len;
+
+ m_queue.erase(m_queue.begin(), m_queue.begin() + len);
+ }
+
+ return ret;
+ }
+
+ /*
+ void wait_and_pop(T& popped_value)
+ {
+ boost::mutex::scoped_lock lock(m_mutex);
+ while(m_queue.size() < m_required_size)
+ {
+ m_condition_variable.wait(lock);
+ }
+
+ popped_value = m_queue.front();
+ m_queue.pop_front();
+ }
+ */
+
+private:
+ std::deque<T> m_queue;
+ mutable boost::mutex m_mutex;
+ //boost::condition_variable m_condition_variable;
+
+ unsigned int m_channels;
+ unsigned int m_bytes_per_sample;
+ size_t m_max_size;
+};
+
+#endif
+
diff --git a/src/zmq.hpp b/src/zmq.hpp
new file mode 100644
index 0000000..147f096
--- /dev/null
+++ b/src/zmq.hpp
@@ -0,0 +1,566 @@
+/*
+ Copyright (c) 2009-2011 250bpm s.r.o.
+ Copyright (c) 2011 Botond Ballo
+ Copyright (c) 2007-2009 iMatix Corporation
+
+ 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.
+*/
+
+#ifndef __ZMQ_HPP_INCLUDED__
+#define __ZMQ_HPP_INCLUDED__
+
+#include <zmq.h>
+
+#include <algorithm>
+#include <cassert>
+#include <cstring>
+#include <string>
+#include <exception>
+
+// Detect whether the compiler supports C++11 rvalue references.
+#if (defined(__GNUC__) && (__GNUC__ > 4 || \
+ (__GNUC__ == 4 && __GNUC_MINOR__ > 2)) && \
+ defined(__GXX_EXPERIMENTAL_CXX0X__))
+ #define ZMQ_HAS_RVALUE_REFS
+ #define ZMQ_DELETED_FUNCTION = delete
+#elif defined(__clang__)
+ #if __has_feature(cxx_rvalue_references)
+ #define ZMQ_HAS_RVALUE_REFS
+ #endif
+
+ #if __has_feature(cxx_deleted_functions)
+ #define ZMQ_DELETED_FUNCTION = delete
+ #else
+ #define ZMQ_DELETED_FUNCTION
+ #endif
+#elif defined(_MSC_VER) && (_MSC_VER >= 1600)
+ #define ZMQ_HAS_RVALUE_REFS
+ #define ZMQ_DELETED_FUNCTION
+#else
+ #define ZMQ_DELETED_FUNCTION
+#endif
+
+#if ZMQ_VERSION >= ZMQ_MAKE_VERSION(3, 3, 0)
+#define ZMQ_NEW_MONITOR_EVENT_LAYOUT
+#endif
+
+// In order to prevent unused variable warnings when building in non-debug
+// mode use this macro to make assertions.
+#ifndef NDEBUG
+# define ZMQ_ASSERT(expression) assert(expression)
+#else
+# define ZMQ_ASSERT(expression) (void)(expression)
+#endif
+
+namespace zmq
+{
+
+ typedef zmq_free_fn free_fn;
+ typedef zmq_pollitem_t pollitem_t;
+
+ class error_t : public std::exception
+ {
+ public:
+
+ error_t () : errnum (zmq_errno ()) {}
+
+ virtual const char *what () const throw ()
+ {
+ return zmq_strerror (errnum);
+ }
+
+ int num () const
+ {
+ return errnum;
+ }
+
+ private:
+
+ int errnum;
+ };
+
+ inline int poll (zmq_pollitem_t *items_, int nitems_, long timeout_ = -1)
+ {
+ int rc = zmq_poll (items_, nitems_, timeout_);
+ if (rc < 0)
+ throw error_t ();
+ return rc;
+ }
+
+ inline void proxy (void *frontend, void *backend, void *capture)
+ {
+ int rc = zmq_proxy (frontend, backend, capture);
+ if (rc != 0)
+ throw error_t ();
+ }
+
+ inline void version (int *major_, int *minor_, int *patch_)
+ {
+ zmq_version (major_, minor_, patch_);
+ }
+
+ class message_t
+ {
+ friend class socket_t;
+
+ public:
+
+ inline message_t ()
+ {
+ int rc = zmq_msg_init (&msg);
+ if (rc != 0)
+ throw error_t ();
+ }
+
+ inline explicit message_t (size_t size_)
+ {
+ int rc = zmq_msg_init_size (&msg, size_);
+ if (rc != 0)
+ throw error_t ();
+ }
+
+ inline message_t (void *data_, size_t size_, free_fn *ffn_,
+ void *hint_ = NULL)
+ {
+ int rc = zmq_msg_init_data (&msg, data_, size_, ffn_, hint_);
+ if (rc != 0)
+ throw error_t ();
+ }
+
+#ifdef ZMQ_HAS_RVALUE_REFS
+ inline message_t (message_t &&rhs) : msg (rhs.msg)
+ {
+ int rc = zmq_msg_init (&rhs.msg);
+ if (rc != 0)
+ throw error_t ();
+ }
+
+ inline message_t &operator = (message_t &&rhs)
+ {
+ std::swap (msg, rhs.msg);
+ return *this;
+ }
+#endif
+
+ inline ~message_t ()
+ {
+ int rc = zmq_msg_close (&msg);
+ ZMQ_ASSERT (rc == 0);
+ }
+
+ inline void rebuild ()
+ {
+ int rc = zmq_msg_close (&msg);
+ if (rc != 0)
+ throw error_t ();
+ rc = zmq_msg_init (&msg);
+ if (rc != 0)
+ throw error_t ();
+ }
+
+ inline void rebuild (size_t size_)
+ {
+ int rc = zmq_msg_close (&msg);
+ if (rc != 0)
+ throw error_t ();
+ rc = zmq_msg_init_size (&msg, size_);
+ if (rc != 0)
+ throw error_t ();
+ }
+
+ inline void rebuild (void *data_, size_t size_, free_fn *ffn_,
+ void *hint_ = NULL)
+ {
+ int rc = zmq_msg_close (&msg);
+ if (rc != 0)
+ throw error_t ();
+ rc = zmq_msg_init_data (&msg, data_, size_, ffn_, hint_);
+ if (rc != 0)
+ throw error_t ();
+ }
+
+ inline void move (message_t *msg_)
+ {
+ int rc = zmq_msg_move (&msg, &(msg_->msg));
+ if (rc != 0)
+ throw error_t ();
+ }
+
+ inline void copy (message_t *msg_)
+ {
+ int rc = zmq_msg_copy (&msg, &(msg_->msg));
+ if (rc != 0)
+ throw error_t ();
+ }
+
+ inline bool more ()
+ {
+ int rc = zmq_msg_more (&msg);
+ return rc != 0;
+ }
+
+ inline void *data ()
+ {
+ return zmq_msg_data (&msg);
+ }
+
+ inline const void* data () const
+ {
+ return zmq_msg_data (const_cast<zmq_msg_t*>(&msg));
+ }
+
+ inline size_t size () const
+ {
+ return zmq_msg_size (const_cast<zmq_msg_t*>(&msg));
+ }
+
+ private:
+
+ // The underlying message
+ zmq_msg_t msg;
+
+ // Disable implicit message copying, so that users won't use shared
+ // messages (less efficient) without being aware of the fact.
+ message_t (const message_t&);
+ void operator = (const message_t&);
+ };
+
+ class context_t
+ {
+ friend class socket_t;
+
+ public:
+ inline context_t ()
+ {
+ ptr = zmq_ctx_new ();
+ if (ptr == NULL)
+ throw error_t ();
+ }
+
+
+ inline explicit context_t (int io_threads_)
+ {
+ ptr = zmq_ctx_new ();
+ if (ptr == NULL)
+ throw error_t ();
+
+ int rc = zmq_ctx_set (ptr, ZMQ_IO_THREADS, io_threads_);
+ ZMQ_ASSERT (rc == 0);
+ }
+
+#ifdef ZMQ_HAS_RVALUE_REFS
+ inline context_t (context_t &&rhs) : ptr (rhs.ptr)
+ {
+ rhs.ptr = NULL;
+ }
+ inline context_t &operator = (context_t &&rhs)
+ {
+ std::swap (ptr, rhs.ptr);
+ return *this;
+ }
+#endif
+
+ inline ~context_t ()
+ {
+ close();
+ }
+
+ inline void close()
+ {
+ if (ptr == NULL)
+ return;
+ int rc = zmq_ctx_destroy (ptr);
+ ZMQ_ASSERT (rc == 0);
+ ptr = NULL;
+ }
+
+ // Be careful with this, it's probably only useful for
+ // using the C api together with an existing C++ api.
+ // Normally you should never need to use this.
+ inline operator void* ()
+ {
+ return ptr;
+ }
+
+ private:
+
+ void *ptr;
+
+ context_t (const context_t&);
+ void operator = (const context_t&);
+ };
+
+ class socket_t
+ {
+ friend class monitor_t;
+ public:
+
+ inline socket_t (context_t &context_, int type_)
+ {
+ ctxptr = context_.ptr;
+ ptr = zmq_socket (context_.ptr, type_);
+ if (ptr == NULL)
+ throw error_t ();
+ }
+
+#ifdef ZMQ_HAS_RVALUE_REFS
+ inline socket_t(socket_t&& rhs) : ptr(rhs.ptr)
+ {
+ rhs.ptr = NULL;
+ }
+ inline socket_t& operator=(socket_t&& rhs)
+ {
+ std::swap(ptr, rhs.ptr);
+ return *this;
+ }
+#endif
+
+ inline ~socket_t ()
+ {
+ close();
+ }
+
+ inline operator void* ()
+ {
+ return ptr;
+ }
+
+ inline void close()
+ {
+ if(ptr == NULL)
+ // already closed
+ return ;
+ int rc = zmq_close (ptr);
+ ZMQ_ASSERT (rc == 0);
+ ptr = 0 ;
+ }
+
+ inline void setsockopt (int option_, const void *optval_,
+ size_t optvallen_)
+ {
+ int rc = zmq_setsockopt (ptr, option_, optval_, optvallen_);
+ if (rc != 0)
+ throw error_t ();
+ }
+
+ inline void getsockopt (int option_, void *optval_,
+ size_t *optvallen_)
+ {
+ int rc = zmq_getsockopt (ptr, option_, optval_, optvallen_);
+ if (rc != 0)
+ throw error_t ();
+ }
+
+ inline void bind (const char *addr_)
+ {
+ int rc = zmq_bind (ptr, addr_);
+ if (rc != 0)
+ throw error_t ();
+ }
+
+ inline void unbind (const char *addr_)
+ {
+ int rc = zmq_unbind (ptr, addr_);
+ if (rc != 0)
+ throw error_t ();
+ }
+
+ inline void connect (const char *addr_)
+ {
+ int rc = zmq_connect (ptr, addr_);
+ if (rc != 0)
+ throw error_t ();
+ }
+
+ inline void disconnect (const char *addr_)
+ {
+ int rc = zmq_disconnect (ptr, addr_);
+ if (rc != 0)
+ throw error_t ();
+ }
+
+ inline bool connected()
+ {
+ return(ptr != NULL);
+ }
+
+ inline size_t send (const void *buf_, size_t len_, int flags_ = 0)
+ {
+ int nbytes = zmq_send (ptr, buf_, len_, flags_);
+ if (nbytes >= 0)
+ return (size_t) nbytes;
+ if (zmq_errno () == EAGAIN)
+ return 0;
+ throw error_t ();
+ }
+
+ inline bool send (message_t &msg_, int flags_ = 0)
+ {
+ int nbytes = zmq_msg_send (&(msg_.msg), ptr, flags_);
+ if (nbytes >= 0)
+ return true;
+ if (zmq_errno () == EAGAIN)
+ return false;
+ throw error_t ();
+ }
+
+ inline size_t recv (void *buf_, size_t len_, int flags_ = 0)
+ {
+ int nbytes = zmq_recv (ptr, buf_, len_, flags_);
+ if (nbytes >= 0)
+ return (size_t) nbytes;
+ if (zmq_errno () == EAGAIN)
+ return 0;
+ throw error_t ();
+ }
+
+ inline bool recv (message_t *msg_, int flags_ = 0)
+ {
+ int nbytes = zmq_msg_recv (&(msg_->msg), ptr, flags_);
+ if (nbytes >= 0)
+ return true;
+ if (zmq_errno () == EAGAIN)
+ return false;
+ throw error_t ();
+ }
+
+ private:
+ void *ptr;
+ void *ctxptr;
+
+ socket_t (const socket_t&) ZMQ_DELETED_FUNCTION;
+ void operator = (const socket_t&) ZMQ_DELETED_FUNCTION;
+ };
+
+ class monitor_t
+ {
+ public:
+ monitor_t() : socketPtr(NULL) {}
+ virtual ~monitor_t() {}
+
+ void monitor(socket_t &socket, const char *addr_, int events = ZMQ_EVENT_ALL)
+ {
+ int rc = zmq_socket_monitor(socket.ptr, addr_, events);
+ if (rc != 0)
+ throw error_t ();
+
+ socketPtr = socket.ptr;
+ void *s = zmq_socket (socket.ctxptr, ZMQ_PAIR);
+ assert (s);
+
+ rc = zmq_connect (s, addr_);
+ assert (rc == 0);
+
+ on_monitor_started();
+
+ while (true) {
+ zmq_msg_t eventMsg;
+ zmq_msg_init (&eventMsg);
+ rc = zmq_recvmsg (s, &eventMsg, 0);
+ if (rc == -1 && zmq_errno() == ETERM)
+ break;
+ assert (rc != -1);
+ zmq_event_t* event = static_cast<zmq_event_t*>(zmq_msg_data (&eventMsg));
+
+#ifdef ZMQ_NEW_MONITOR_EVENT_LAYOUT
+ zmq_msg_t addrMsg;
+ zmq_msg_init (&addrMsg);
+ rc = zmq_recvmsg (s, &addrMsg, 0);
+ if (rc == -1 && zmq_errno() == ETERM)
+ break;
+ assert (rc != -1);
+ const char* str = static_cast<const char*>(zmq_msg_data (&addrMsg));
+ std::string address(str, str + zmq_msg_size(&addrMsg));
+ zmq_msg_close (&addrMsg);
+#else
+ // Bit of a hack, but all events in the zmq_event_t union have the same layout so this will work for all event types.
+ std::string address = event->data.connected.addr;
+#endif
+
+#ifdef ZMQ_EVENT_MONITOR_STOPPED
+ if (event->event == ZMQ_EVENT_MONITOR_STOPPED)
+ break;
+#endif
+
+ switch (event->event) {
+ case ZMQ_EVENT_CONNECTED:
+ on_event_connected(*event, address.c_str());
+ break;
+ case ZMQ_EVENT_CONNECT_DELAYED:
+ on_event_connect_delayed(*event, address.c_str());
+ break;
+ case ZMQ_EVENT_CONNECT_RETRIED:
+ on_event_connect_retried(*event, address.c_str());
+ break;
+ case ZMQ_EVENT_LISTENING:
+ on_event_listening(*event, address.c_str());
+ break;
+ case ZMQ_EVENT_BIND_FAILED:
+ on_event_bind_failed(*event, address.c_str());
+ break;
+ case ZMQ_EVENT_ACCEPTED:
+ on_event_accepted(*event, address.c_str());
+ break;
+ case ZMQ_EVENT_ACCEPT_FAILED:
+ on_event_accept_failed(*event, address.c_str());
+ break;
+ case ZMQ_EVENT_CLOSED:
+ on_event_closed(*event, address.c_str());
+ break;
+ case ZMQ_EVENT_CLOSE_FAILED:
+ on_event_close_failed(*event, address.c_str());
+ break;
+ case ZMQ_EVENT_DISCONNECTED:
+ on_event_disconnected(*event, address.c_str());
+ break;
+ default:
+ on_event_unknown(*event, address.c_str());
+ break;
+ }
+ zmq_msg_close (&eventMsg);
+ }
+ zmq_close (s);
+ socketPtr = NULL;
+ }
+
+#ifdef ZMQ_EVENT_MONITOR_STOPPED
+ void abort()
+ {
+ if (socketPtr)
+ zmq_socket_monitor(socketPtr, NULL, 0);
+ }
+#endif
+ virtual void on_monitor_started() {}
+ virtual void on_event_connected(const zmq_event_t &event_, const char* addr_) { (void)event_; (void)addr_; }
+ virtual void on_event_connect_delayed(const zmq_event_t &event_, const char* addr_) { (void)event_; (void)addr_; }
+ virtual void on_event_connect_retried(const zmq_event_t &event_, const char* addr_) { (void)event_; (void)addr_; }
+ virtual void on_event_listening(const zmq_event_t &event_, const char* addr_) { (void)event_; (void)addr_; }
+ virtual void on_event_bind_failed(const zmq_event_t &event_, const char* addr_) { (void)event_; (void)addr_; }
+ virtual void on_event_accepted(const zmq_event_t &event_, const char* addr_) { (void)event_; (void)addr_; }
+ virtual void on_event_accept_failed(const zmq_event_t &event_, const char* addr_) { (void)event_; (void)addr_; }
+ virtual void on_event_closed(const zmq_event_t &event_, const char* addr_) { (void)event_; (void)addr_; }
+ virtual void on_event_close_failed(const zmq_event_t &event_, const char* addr_) { (void)event_; (void)addr_; }
+ virtual void on_event_disconnected(const zmq_event_t &event_, const char* addr_) { (void)event_; (void)addr_; }
+ virtual void on_event_unknown(const zmq_event_t &event_, const char* addr_) { (void)event_; (void)addr_; }
+ private:
+ void* socketPtr;
+ };
+}
+
+#endif
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