mp4live.cpp

网络MPEG4IP流媒体开发源代码

/*
 * The contents of this file are subject to the Mozilla Public
 * License Version 1.1 (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.mozilla.org/MPL/
 * 
 * Software distributed under the License is distributed on an "AS
 * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
 * implied. See the License for the specific language governing
 * rights and limitations under the License.
 * 
 * The Original Code is MPEG4IP.
 * 
 * The Initial Developer of the Original Code is Cisco Systems Inc.
 * Portions created by Cisco Systems Inc. are
 * Copyright (C) Cisco Systems Inc. 2000, 2001.  All Rights Reserved.
 * 
 * Contributor(s): 
 *		Dave Mackie		[e-mail]
 *		Bill May 		[e-mail]
 */
#define DECLARE_CONFIG_VARIABLES 1
#include "mp4live.h"
#include "media_flow.h"
#include "video_v4l_source.h"
#include "audio_oss_source.h"
#include "mp4live_common.h"
#include <getopt.h>
#include <signal.h>

// InitializeConfigVariables - if you want to add configuration 
// variables, you most likely want to add them here, before you
// return the new CLiveConfig.  Use the AddConfigVariables function
// of the CLiveConfig class to do that.

CLiveConfig *InitializeConfigVariables (void)
{
  char userFileName[MAXPATHLEN];
  char* home;

  home = getenv("HOME");
  if (home) {
    strcpy(userFileName, home);
    strcat(userFileName, "/.mp4live_rc");
  }
  return new CLiveConfig(MyConfigVariables,
			 sizeof(MyConfigVariables) / sizeof(SConfigVariable),
			 home ? userFileName : NULL);
}

// CreateVideoSource - if you've got more sources to add, this is
// where you can do that.
CMediaSource *CreateVideoSource (CLiveConfig *pConfig)
{
  CMediaSource *vs;
  const char* sourceType = 
    pConfig->GetStringValue(CONFIG_VIDEO_SOURCE_TYPE);

  if (!strcasecmp(sourceType, VIDEO_SOURCE_V4L)) {
    vs = new CV4LVideoSource();
  } else {
    error_message("unknown video source type %s", sourceType);
    return NULL;
  }
  vs->SetConfig(pConfig);
  vs->StartThread();
  return vs;
}

// CreateAudioSource - if you've got more sources to add, this is
// where you can do that.
CMediaSource *CreateAudioSource (CLiveConfig *pConfig,
				 CMediaSource *videoSource)
{
  CMediaSource *audioSource;

  if (pConfig->IsOneSource() && videoSource) {
    audioSource = videoSource;
  } else {
    const char* sourceType = 
      pConfig->GetStringValue(CONFIG_AUDIO_SOURCE_TYPE);

    if (!strcasecmp(sourceType, AUDIO_SOURCE_OSS)) {
      audioSource = new COSSAudioSource(pConfig);
    } else {
      error_message("unknown audio source type %s", sourceType);
      return NULL;
    }
    audioSource->StartThread();
  }
  
  audioSource->SetVideoSource(videoSource);

  return audioSource;
}

int main(int argc, char** argv)
{
	int rc;
	char* configFileName = NULL;
	bool automatic = false;
	bool headless = false;
	bool sdpOnly = false;
	extern int nogui_main(CLiveConfig* pConfig);
	extern int gui_main(int argc, char**argv, CLiveConfig* pConfig);

	// command line parsing
	while (true) {
		int c = -1;
		int option_index = 0;
		static struct option long_options[] = {
			{ "automatic", 0, 0, 'a' },
			{ "file", 1, 0, 'f' },
			{ "headless", 0, 0, 'h' },
			{ "sdp", 0, 0, 's' }, 
			{ "version", 0, 0, 'v' },
			{ NULL, 0, 0, 0 }
		};

		c = getopt_long_only(argc, argv, "af:hsv",
			long_options, &option_index);

		if (c == -1)
			break;

		switch (c) {
		case 'a':
			automatic = true;
			break;
		case 'f':	// -f <config-file>
			configFileName = stralloc(optarg);
			break;
		case 'h':
			headless = true;
			break;
		case 's':
			sdpOnly = true;
			break;
		case 'v':
			fprintf(stderr, "%s version %s\n", argv[0], VERSION);
			exit(0);
		case '?':
		default:
			fprintf(stderr, 
				"Usage: %s [-f config_file] [--automatic] [--headless] [--sdp]\n",
				argv[0]);
			exit(-1);
		}
	}

	CLiveConfig* pConfig = InitializeConfigVariables();

	if (ReadConfigFile(configFileName, pConfig) < 0) {
	}

	ProbeVideoAudioCapabilities(pConfig);

	pConfig->Update();

	// initialization done, time to execute

	// first case: just want to generate the SDP file
	if (sdpOnly) {
		rc = GenerateSdpFile(pConfig);
		delete pConfig;
		exit(rc);
	}

	// other cases:

	SetupRealTimeFeatures(pConfig);

#ifndef HAVE_GTK
	rc = nogui_main(pConfig);
#else
	if (headless) {
		rc = nogui_main(pConfig);
	} else {
		// hand over control to GUI
		try {
			rc = gui_main(argc, argv, pConfig);
		}
		catch (void* e) {
			rc = -1;
		}
	}
#endif

	// save any changes to user config file
	if (configFileName == NULL) {
		pConfig->WriteToFile(pConfig->GetFileName());
	} else {
		free(configFileName);
	}

	if (pConfig->GetBoolValue(CONFIG_APP_REAL_TIME_SCHEDULER)) {
#ifdef _POSIX_MEMLOCK
		munlockall();
#endif /* _POSIX_MEMLOCK */
	}

	// cleanup
	delete pConfig;
	exit (rc);
}

static int stop_signal_received;

static void signal_stop_handler (int sig)
{
  error_message("Received stop signal %d", sig);
  stop_signal_received = 1;
}

int nogui_main(CLiveConfig* pConfig)
{
  double maxduration, duration;
  time_t starttime, nowtime;

	if (!pConfig->GetBoolValue(CONFIG_AUDIO_ENABLE)
	  && !pConfig->GetBoolValue(CONFIG_VIDEO_ENABLE)) {
		return -1;
	}

	InstallSignalHandler(pConfig, signal_stop_handler);

	// override any configured value of preview
	bool previewValue =
		pConfig->GetBoolValue(CONFIG_VIDEO_PREVIEW);
	pConfig->SetBoolValue(CONFIG_VIDEO_PREVIEW, false);

	CAVMediaFlow* pFlow = new CAVMediaFlow(pConfig);

	pFlow->Start();
	stop_signal_received = 0;
	maxduration = pConfig->GetIntegerValue(CONFIG_APP_DURATION)
	  * pConfig->GetIntegerValue(CONFIG_APP_DURATION_UNITS);
	
	starttime = time(NULL);
	do {
	  sleep(1);
	  nowtime = time(NULL);
	  duration = difftime(nowtime, starttime);
	} while (duration < maxduration && stop_signal_received == 0);


	pFlow->Stop();

	delete pFlow;

	pConfig->SetBoolValue(CONFIG_VIDEO_PREVIEW, previewValue);

	return 0;
}