video_rxtx.cpp

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#include <sstream>
#include <stdexcept>
#include <string>
#include <utility>
 
#include "debug.h"
#include "export.h"
#include "host.h"
#include "lib_common.h"
#include "messaging.h"
#include "module.h"
#include "pdb.h"
#include "rtp/rtp.h"
#include "rtp/video_decoders.h"
#include "rtp/pbuf.h"
#include "tfrc.h"
#include "transmit.h"
#include "tv.h"
#include "utils/thread.h"
#include "utils/vf_split.h"
#include "video.h"
#include "video_compress.h"
#include "video_decompress.h"
#include "video_display.h"
#include "video_rxtx.hpp"
 
#define MOD_NAME "[vrxtx] "
 
using std::map;
using std::shared_ptr;
using std::string;
 
video_rxtx::video_rxtx(map<string, param_u> const &params): m_port_id("default"),
                m_rxtx_mode(params.at("rxtx_mode").i),
                m_frames_sent(0ull),
                m_common(*static_cast<struct common_opts const *>(params.at("common").cptr)),
                m_thread_id(), m_poisoned(false), m_joined(true) {
 
        module_init_default(&m_sender_mod);
        m_sender_mod.cls = MODULE_CLASS_SENDER;
        module_register(&m_sender_mod, m_common.parent);
 
        module_init_default(&m_receiver_mod);
        m_receiver_mod.cls = MODULE_CLASS_RECEIVER;
        module_register(&m_receiver_mod, m_common.parent);
 
        try {
                int ret = compress_init(&m_sender_mod, static_cast<const char *>(params.at("compression").ptr),
                                &m_compression);
                if(ret != 0) {
                        if(ret < 0) {
                                throw string("Error initializing compression.");
                        }
                        if(ret > 0) {
                                throw EXIT_SUCCESS;
                        }
                }
 
                pthread_mutex_init(&m_lock, NULL);
 
        } catch (...) {
                if (m_compression) {
                        compress_done(m_compression);
                }
 
                module_done(&m_receiver_mod);
                module_done(&m_sender_mod);
 
                throw;
        }
}
 
void video_rxtx::should_exit(void *state) {
        video_rxtx *s = (video_rxtx *) state;
        s->m_should_exit = true;
}
 
video_rxtx::~video_rxtx() {
        join();
        if (!m_poisoned && m_compression) {
                send(NULL);
                compress_pop(m_compression);
        }
        compress_done(m_compression);
        module_done(&m_receiver_mod);
        module_done(&m_sender_mod);
}
 
void video_rxtx::start() {
        register_should_exit_callback(m_common.parent, video_rxtx::should_exit,
                                      this);
        if (pthread_create(&m_thread_id, NULL, video_rxtx::sender_thread,
                           (void *) this) != 0) {
                throw string("Unable to create sender thread!\n");
        }
        m_joined = false;
}
 
void video_rxtx::join() {
        if (m_joined) {
                return;
        }
        send(NULL); // pass poisoned pill
        pthread_join(m_thread_id, NULL);
        unregister_should_exit_callback(m_common.parent, video_rxtx::should_exit, this);
        m_joined = true;
}
 
const char *video_rxtx::get_long_name(string const & short_name) {
        auto vri = static_cast<const video_rxtx_info *>(load_library(short_name.c_str(), LIBRARY_CLASS_VIDEO_RXTX, VIDEO_RXTX_ABI_VERSION));
        if (vri) {
                return vri->long_name;
        } else {
                return "";
        }
}
 
void video_rxtx::send(shared_ptr<video_frame> frame) {
        if (!frame && m_poisoned) {
                return;
        }
        compress_frame(m_compression, frame);
        if (!frame) {
                m_poisoned = true;
        }
}
 
void *video_rxtx::sender_thread(void *args) {
        return static_cast<video_rxtx *>(args)->sender_loop();
}
 
void video_rxtx::check_sender_messages() {
        // process external messages
        struct message *msg_external;
        while((msg_external = check_message(&m_sender_mod))) {
                struct response *r = process_sender_message((struct msg_sender *) msg_external);
                free_message(msg_external, r);
        }
}
 
void *video_rxtx::sender_loop() {
        set_thread_name(__func__);
        struct video_desc saved_vid_desc;
 
        memset(&saved_vid_desc, 0, sizeof(saved_vid_desc));
 
        while(1) {
                check_sender_messages();
 
                shared_ptr<video_frame> tx_frame;
 
                tx_frame = compress_pop(m_compression);
                if (!tx_frame) {
                        break;
                }
 
                export_video(m_common.exporter, tx_frame.get());
 
                send_frame(std::move(tx_frame));
                m_frames_sent += 1;
        }
 
        check_sender_messages();
        return NULL;
}
 
video_rxtx *video_rxtx::create(string const & proto, std::map<std::string, param_u> const &params)
{
        auto vri = static_cast<const video_rxtx_info *>(load_library(proto.c_str(), LIBRARY_CLASS_VIDEO_RXTX, VIDEO_RXTX_ABI_VERSION));
        if (!vri) {
                return nullptr;
        }
        auto ret = vri->create(params);
        if (!ret) {
                return nullptr;
        }
        ret->start();
        return ret;
}
 
void video_rxtx::list(bool full)
{
        printf("Available TX protocols:\n");
        list_modules(LIBRARY_CLASS_VIDEO_RXTX, VIDEO_RXTX_ABI_VERSION, full);
}
 
void
video_rxtx::set_audio_spec(const struct audio_desc * /* desc */,
                           int /* audio_rx_port */, int /* audio_tx_port */,
                           bool /* ipv6 */)
{
        MSG(INFO, "video RXTX not h264_rtp, not setting audio...\n");
}