コード例 #1
0
ファイル: porting.cpp プロジェクト: WantedGames/freeminer
/*
	Multithreading support
*/
int getNumberOfProcessors() {
#if defined(_SC_NPROCESSORS_ONLN)

	return sysconf(_SC_NPROCESSORS_ONLN);

#elif defined(__FreeBSD__) || defined(__APPLE__)

	unsigned int len, count;
	len = sizeof(count);
	return sysctlbyname("hw.ncpu", &count, &len, NULL, 0);

#elif defined(_GNU_SOURCE)

	return get_nprocs();

#elif defined(_WIN32)

	SYSTEM_INFO sysinfo;
	GetSystemInfo(&sysinfo);
	return sysinfo.dwNumberOfProcessors;

#elif defined(PTW32_VERSION) || defined(__hpux)

	return pthread_num_processors_np();

#else

	return 1;

#endif
}
コード例 #2
0
ファイル: Leafcutter.cpp プロジェクト: ema0j/cs482-icg-pj
void Leafcutter::leafcut(shared_ptr<Image<Vec4f> > image, shared_ptr<LightTree > lightTree, uint32_t samples, shared_ptr<ReportHandler> report)
{
    _report = report;
    _image = image;
    _lightTree = lightTree;

    _nCore = pthread_num_processors_np();

    stringstream sout;
    sout << "Leafcut on " << _nCore << " threads";
    if (_report) _report->beginActivity(sout.str());

    uint32_t lightNum = lightTree->DirectionalLightNum() + lightTree->OrientedLightNum();
    image->Alloc(lightNum, samples);
    _curLine = 0;

    _mutex = PTHREAD_MUTEX_INITIALIZER;
    pthread_mutex_init(&_mutex, NULL);
    vector<pthread_t> threads(_nCore);

    _sampler->BeginPixel(samples);
    for (uint64_t idx = 0; idx < threads.size(); idx++)
    {
        pthread_create(&threads[idx], NULL, TreeWalkThread, this);
    }

    for (uint64_t idx = 0; idx < threads.size(); idx++)
    {
        pthread_join(threads[idx], NULL);
    }
    _sampler->EndPixel();

    pthread_mutex_destroy(&_mutex);
    if (_report) _report->endActivity();
}
コード例 #3
0
unsigned possibleThreadCount() {
  #if defined(PTW32_VERSION) || defined(__hpux)
  return pthread_num_processors_np();
  #elif defined(__APPLE__) || defined(__FreeBSD__)
  int count;
  size_t size = sizeof(count);
  return sysctlbyname("hw.ncpu", &count, &size, NULL, 0) ? 0 : count;
  #elif defined(BOOST_HAS_UNISTD_H) && defined(_SC_NPROCESSORS_ONLN)
  int const count = sysconf(_SC_NPROCESSORS_ONLN);
  return (count > 0) ? count : 1;
  #elif defined(_GNU_SOURCE)
  return get_nprocs();
  #else
  return 1;
  #endif
}
コード例 #4
0
ファイル: thread.cpp プロジェクト: JeffreyZksun/pcassist
    unsigned thread::hardware_concurrency()
    {
#if defined(PTW32_VERSION) || defined(__hpux)
        return pthread_num_processors_np();
#elif defined(__APPLE__) || defined(__FreeBSD__)
        int count;
        size_t size=sizeof(count);
        return sysctlbyname("hw.ncpu",&count,&size,NULL,0)?0:count;
#elif defined(BOOST_HAS_UNISTD_H) && defined(_SC_NPROCESSORS_ONLN)
        int const count=sysconf(_SC_NPROCESSORS_ONLN);
        return (count>0)?count:0;
#elif defined(__GLIBC__)
        return get_nprocs();
#else
        return 0;
#endif
    }
コード例 #5
0
ファイル: xvid_dec.c プロジェクト: DanielGit/Intrisit201202
static int
xvid_gbl_info(xvid_gbl_info_t * info)
{
	if (XVID_VERSION_MAJOR(info->version) != 1) /* v1.x.x */
		return XVID_ERR_VERSION;

	info->actual_version = XVID_VERSION;
	info->build = "xvid-1.1.3";
	info->cpu_flags = detect_cpu_flags();

#if defined(_SMP) && defined(WIN32)
	info->num_threads = pthread_num_processors_np();;
#else
	info->num_threads = 0;
#endif

	return 0;
}
コード例 #6
0
ファイル: thread.cpp プロジェクト: 00c/ayntest_game
unsigned int Thread::getNumberOfProcessors()
{
#if __cplusplus >= 201103L

	return std::thread::hardware_concurrency();

#elif defined(_SC_NPROCESSORS_ONLN)

	return sysconf(_SC_NPROCESSORS_ONLN);

#elif defined(__FreeBSD__) || defined(__NetBSD__) || \
	defined(__DragonFly__) || defined(__APPLE__)

	unsigned int num_cpus = 1;
	size_t len = sizeof(num_cpus);

	int mib[2];
	mib[0] = CTL_HW;
	mib[1] = HW_NCPU;

	sysctl(mib, 2, &num_cpus, &len, NULL, 0);
	return num_cpus;

#elif defined(_GNU_SOURCE)

	return get_nprocs();

#elif defined(_WIN32)

	SYSTEM_INFO sysinfo;
	GetSystemInfo(&sysinfo);
	return sysinfo.dwNumberOfProcessors;

#elif defined(PTW32_VERSION) || defined(__hpux)

	return pthread_num_processors_np();

#else

	return 1;

#endif
}
コード例 #7
0
ファイル: Environment_UNIX.cpp プロジェクト: 12307/poco
unsigned EnvironmentImpl::processorCountImpl()
{
#if defined(_SC_NPROCESSORS_ONLN)
	int count = sysconf(_SC_NPROCESSORS_ONLN);
	if (count <= 0) count = 1;
	return static_cast<int>(count);
#elif defined(POCO_OS_FAMILY_BSD)
	unsigned count;
	std::size_t size = sizeof(count);
	if (sysctlbyname("hw.ncpu", &count, &size, 0, 0))
		return 1;
	else
		return count;
#elif POCO_OS == POCO_OS_HPUX
	return pthread_num_processors_np();
#else
	return 1;
#endif
}
コード例 #8
0
ファイル: par2creator.cpp プロジェクト: Koios/par2-cmdline
Par2Creator::Par2Creator(void)
: noiselevel(CommandLine::nlUnknown)
, blocksize(0)
, chunksize(0)
, inputbuffer(0)
, outputbuffer(0)

, sourcefilecount(0)
, sourceblockcount(0)

, largestfilesize(0)
, recoveryfilescheme(CommandLine::scUnknown)
, recoveryfilecount(0)
, recoveryblockcount(0)
, firstrecoveryblock(0)

, mainpacket(0)
, creatorpacket(0)

, previouslyReportedFraction (0)
, deferhashcomputation(false)
{
	// Some stuff for the multi-thread optimization
	pthread_mutex_init (&progressMutex, NULL);
	// Go and find number of CPU's in this machine
#ifdef WIN32
	numCPUs = pthread_num_processors_np();
#else // !WIN32
#ifdef CTL_HW
	int lName [2] = { CTL_HW, HW_NCPU };
	size_t lLen = sizeof (numCPUs);
	if (sysctl(lName, 2, &numCPUs, &lLen, NULL, 0) != 0)
	{
		assert (false);
		numCPUs = 1;		// Default value if we have an error in sysctl
	}
#elif defined(_SC_NPROCESSORS_ONLN)
  numCPUs = sysconf( _SC_NPROCESSORS_ONLN );
#else
  numCPUs = 1;
#endif // CTL_HW
#endif // !WIN32
}
コード例 #9
0
ファイル: spin4.c プロジェクト: Schiiiiins/lcu1
int
main()
{
  long result = 0;
  pthread_t t;
  int CPUs;
  struct _timeb sysTime;

  if ((CPUs = pthread_num_processors_np()) == 1)
    {
      printf("Test not run - it requires multiple CPUs.\n");
	exit(0);
    }

  assert(pthread_spin_lock(&lock) == 0);

  assert(pthread_create(&t, NULL, func, NULL) == 0);

  while (washere == 0)
    {
      sched_yield();
    }

  do
    {
      sched_yield();
      _ftime(&sysTime);
    }
  while (GetDurationMilliSecs(currSysTimeStart, sysTime) <= 1000);

  assert(pthread_spin_unlock(&lock) == 0);

  assert(pthread_join(t, (void **) &result) == 0);
  assert(result > 1000);

  assert(pthread_spin_destroy(&lock) == 0);

  assert(washere == 1);

  return 0;
}
コード例 #10
0
ファイル: Object.c プロジェクト: pchapin/solarium
void time_step( )
{
    #ifdef __GLIBC__
    int processor_count = get_nprocs( );
    #else
    int processor_count = pthread_num_processors_np( );
    #endif
    int objects_per_processor = OBJECT_COUNT / processor_count;

    struct Work_Unit *chunks =
        (struct Work_Unit *)malloc( processor_count * sizeof(struct Work_Unit) );
    pthread_t *thread_IDs =
        (pthread_t *)malloc( processor_count * sizeof(pthread_t) );
    
    // Create a thread for each CPU and set it working on its work unit.
    for( int i = 0; i < processor_count; ++i ) {
        struct Work_Unit *chunk =
            (struct Work_Unit *)malloc( sizeof( struct Work_Unit ) );
        chunk->start_index = i * objects_per_processor;
        if( i == processor_count - 1 )
            chunk->stop_index = OBJECT_COUNT;
        else
            chunk->stop_index   = ( i + 1 ) * objects_per_processor;
        pthread_create( &thread_IDs[i], NULL, compute_next_dynamics, chunk);
    }
    

    // Wait for all thread to end.
    for( int i = 0; i < processor_count; ++i ) {
        pthread_join( thread_IDs[i], NULL );
    }
        
    // Swap the dynamics arrays.
    ObjectDynamics *temp = current_dynamics;
    current_dynamics     = next_dynamics;
    next_dynamics        = temp;

    free(chunks);
    free(thread_IDs);
}
コード例 #11
0
ファイル: gml.cpp プロジェクト: eXLabT/spring
unsigned gmlCPUCount() {
#ifdef _WIN32
	SYSTEM_INFO info={0};
	GetSystemInfo(&info);
	return info.dwNumberOfProcessors;
#else
#	if defined(PTW32_VERSION) || defined(__hpux)
	return pthread_num_processors_np();
#	elif defined(__linux__)
	return get_nprocs();
#	elif defined(__APPLE__) || defined(__FreeBSD__)
	int count;
	size_t size=sizeof(count);
	return sysctlbyname("hw.ncpu",&count,&size,NULL,0)?0:count;
#	elif defined(__sun)
	int const count=sysconf(_SC_NPROCESSORS_ONLN);
	return (count>0)?count:0;
#	else
	return 0;
#	endif
#endif
}
コード例 #12
0
ファイル: pthread_support.c プロジェクト: 97jaz/racket
/* We hold the allocation lock.	*/
void GC_thr_init(void)
{
#   ifndef GC_DARWIN_THREADS
        int dummy;
#   endif
    GC_thread t;

    if (GC_thr_initialized) return;
    GC_thr_initialized = TRUE;
    
#   ifdef HANDLE_FORK
      /* Prepare for a possible fork.	*/
        pthread_atfork(GC_fork_prepare_proc, GC_fork_parent_proc,
	  	       GC_fork_child_proc);
#   endif /* HANDLE_FORK */
#   if defined(INCLUDE_LINUX_THREAD_DESCR)
      /* Explicitly register the region including the address 		*/
      /* of a thread local variable.  This should include thread	*/
      /* locals for the main thread, except for those allocated		*/
      /* in response to dlopen calls.					*/  
	{
	  ptr_t thread_local_addr = (ptr_t)(&dummy_thread_local);
	  ptr_t main_thread_start, main_thread_end;
          if (!GC_enclosing_mapping(thread_local_addr, &main_thread_start,
				    &main_thread_end)) {
	    ABORT("Failed to find mapping for main thread thread locals");
	  }
	  GC_add_roots_inner(main_thread_start, main_thread_end, FALSE);
	}
#   endif
    /* Add the initial thread, so we can stop it.	*/
      t = GC_new_thread(pthread_self());
#     ifdef GC_DARWIN_THREADS
         t -> stop_info.mach_thread = mach_thread_self();
#     else
         t -> stop_info.stack_ptr = (ptr_t)(&dummy);
#     endif
      t -> flags = DETACHED | MAIN_THREAD;

    GC_stop_init();

    /* Set GC_nprocs.  */
      {
	char * nprocs_string = GETENV("GC_NPROCS");
	GC_nprocs = -1;
	if (nprocs_string != NULL) GC_nprocs = atoi(nprocs_string);
      }
      if (GC_nprocs <= 0) {
#       if defined(GC_HPUX_THREADS)
	  GC_nprocs = pthread_num_processors_np();
#       endif
#	if defined(GC_OSF1_THREADS) || defined(GC_AIX_THREADS) \
	   || defined(GC_SOLARIS_THREADS) || defined(GC_GNU_THREADS)
	  GC_nprocs = sysconf(_SC_NPROCESSORS_ONLN);
	  if (GC_nprocs <= 0) GC_nprocs = 1;
#	endif
#       if defined(GC_IRIX_THREADS)
	  GC_nprocs = sysconf(_SC_NPROC_ONLN);
	  if (GC_nprocs <= 0) GC_nprocs = 1;
#       endif
#       if defined(GC_NETBSD_THREADS)
	  GC_nprocs = get_ncpu();
#       endif
#       if defined(GC_OPENBSD_THREADS)
	  GC_nprocs = 1;
#       endif
#       if defined(GC_DARWIN_THREADS) || defined(GC_FREEBSD_THREADS)
	  int ncpus = 1;
	  size_t len = sizeof(ncpus);
	  sysctl((int[2]) {CTL_HW, HW_NCPU}, 2, &ncpus, &len, NULL, 0);
コード例 #13
0
ファイル: vd_ffmpeg.c プロジェクト: hanyong/mplayer-kovensky
// init driver
static int init(sh_video_t *sh){
    struct lavc_param *lavc_param = &sh->opts->lavc_param;
    AVCodecContext *avctx;
    vd_ffmpeg_ctx *ctx;
    AVCodec *lavc_codec;
    int lowres_w=0;
    int do_vis_debug= lavc_param->vismv || (lavc_param->debug&(FF_DEBUG_VIS_MB_TYPE|FF_DEBUG_VIS_QP));

    if(!avcodec_initialized){
        avcodec_init();
        avcodec_register_all();
        avcodec_initialized=1;
    }

    ctx = sh->context = malloc(sizeof(vd_ffmpeg_ctx));
    if (!ctx)
        return 0;
    memset(ctx, 0, sizeof(vd_ffmpeg_ctx));

    lavc_codec = (AVCodec *)avcodec_find_decoder_by_name(sh->codec->dll);
    if(!lavc_codec){
        mp_tmsg(MSGT_DECVIDEO, MSGL_ERR, "Cannot find codec '%s' in libavcodec...\n", sh->codec->dll);
        uninit(sh);
        return 0;
    }

    if(sh->opts->vd_use_slices && (lavc_codec->capabilities&CODEC_CAP_DRAW_HORIZ_BAND) && !do_vis_debug)
        ctx->do_slices=1;

    if(lavc_codec->capabilities&CODEC_CAP_DR1 && !do_vis_debug && lavc_codec->id != CODEC_ID_H264 && lavc_codec->id != CODEC_ID_INTERPLAY_VIDEO && lavc_codec->id != CODEC_ID_ROQ)
        ctx->do_dr1=1;
    ctx->b_age= ctx->ip_age[0]= ctx->ip_age[1]= 256*256*256*64;
    ctx->ip_count= ctx->b_count= 0;

    ctx->pic = avcodec_alloc_frame();
    ctx->avctx = avcodec_alloc_context();
    avctx = ctx->avctx;
    avctx->opaque = sh;
    avctx->codec_type = CODEC_TYPE_VIDEO;
    avctx->codec_id = lavc_codec->id;

    if (lavc_codec->capabilities & CODEC_CAP_HWACCEL   // XvMC
        || lavc_codec->capabilities & CODEC_CAP_HWACCEL_VDPAU) {
        ctx->do_dr1    = true;
        ctx->do_slices = true;
        lavc_param->threads    = 1;
        avctx->get_format      = get_format;
        avctx->get_buffer      = get_buffer;
        avctx->release_buffer  = release_buffer;
        avctx->reget_buffer    = get_buffer;
        avctx->draw_horiz_band = draw_slice;
        if (lavc_codec->capabilities & CODEC_CAP_HWACCEL)
            mp_msg(MSGT_DECVIDEO, MSGL_V, "[VD_FFMPEG] XVMC-accelerated "
                   "MPEG-2.\n");
        if (lavc_codec->capabilities & CODEC_CAP_HWACCEL_VDPAU)
            mp_msg(MSGT_DECVIDEO, MSGL_V, "[VD_FFMPEG] VDPAU hardware "
                   "decoding.\n");
        avctx->slice_flags = SLICE_FLAG_CODED_ORDER|SLICE_FLAG_ALLOW_FIELD;
    }

    if ( lavc_param->threads == 0 ) {
#if defined(_WIN32)
        lavc_param->threads = pthread_num_processors_np();
#elif defined(__linux__)
        unsigned int bit;
        int np;
        cpu_set_t p_aff;
        memset( &p_aff, 0, sizeof(p_aff) );
        sched_getaffinity( 0, sizeof(p_aff), &p_aff );
        for( np = 0, bit = 0; bit < sizeof(p_aff); bit++ )
            np += (((uint8_t *)&p_aff)[bit / 8] >> (bit % 8)) & 1;

        lavc_param->threads = np;
#elif defined(__BEOS__)
        system_info info;
        get_system_info( &info );
        lavc_param->threads = info.cpu_count;

#elif defined(__MACH__) || defined(__APPLE__) || defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__OpenBSD__)
        int numberOfCPUs;
        size_t length = sizeof( numberOfCPUs );
#ifdef __OpenBSD__
        int mib[2] = { CTL_HW, HW_NCPU };
        if( sysctl(mib, 2, &numberOfCPUs, &length, NULL, 0) )
#else
        if( sysctlbyname("hw.ncpu", &numberOfCPUs, &length, NULL, 0) )
#endif
        {
             numberOfCPUs = 1;
        }
        lavc_param->threads = numberOfCPUs;
#else /* No CPU detection routine available */
        lavc_param->threads = 1;
#endif
    }
コード例 #14
0
ファイル: vd_ffmpeg.c プロジェクト: zoominla/mplayer-ww
// init driver
static int init(sh_video_t *sh){
    AVCodecContext *avctx;
    vd_ffmpeg_ctx *ctx;
    AVCodec *lavc_codec;
    int lowres_w=0;
    int do_vis_debug= lavc_param_vismv || (lavc_param_debug&(FF_DEBUG_VIS_MB_TYPE|FF_DEBUG_VIS_QP));
    // slice is rather broken with threads, so disable that combination unless
    // explicitly requested
    int use_slices = vd_use_slices > 0 || (vd_use_slices <  0 && lavc_param_threads <= 1);
    AVDictionary *opts = NULL;

    init_avcodec();

    ctx = sh->context = malloc(sizeof(vd_ffmpeg_ctx));
    if (!ctx)
        return 0;
    memset(ctx, 0, sizeof(vd_ffmpeg_ctx));

    lavc_codec = avcodec_find_decoder_by_name(sh->codec->dll);
    if(!lavc_codec){
        mp_msg(MSGT_DECVIDEO, MSGL_ERR, MSGTR_MissingLAVCcodec, sh->codec->dll);
        uninit(sh);
        return 0;
    }

    if (auto_threads) {
#if (defined(__MINGW32__) && HAVE_PTHREADS)
        lavc_param_threads = pthread_num_processors_np();
#elif defined(__linux__)
        /* Code stolen from x264 :) */
        unsigned int bit;
        int np;
        cpu_set_t p_aff;
        memset( &p_aff, 0, sizeof(p_aff) );
        sched_getaffinity( 0, sizeof(p_aff), &p_aff );
        for( np = 0, bit = 0; bit < sizeof(p_aff); bit++ )
            np += (((uint8_t *)&p_aff)[bit / 8] >> (bit % 8)) & 1;

        lavc_param_threads = np;
#elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__) || defined(__APPLE__) || defined (__NetBSD__) || defined(__OpenBSD__)
        /* Code stolen from x264 :) */
        int numberOfCPUs;
        size_t length = sizeof( numberOfCPUs );
#if defined (__NetBSD__) || defined(__OpenBSD__)
        int mib[2] = { CTL_HW, HW_NCPU };
        if( sysctl(mib, 2, &numberOfCPUs, &length, NULL, 0) )
#else
        if( sysctlbyname("hw.ncpu", &numberOfCPUs, &length, NULL, 0) )
#endif
        {
            numberOfCPUs = 1;
        }
        lavc_param_threads = numberOfCPUs;
#endif
        if(lavc_codec->id == CODEC_ID_H264 || lavc_codec->id == CODEC_ID_FFH264 
		 || lavc_codec->id == CODEC_ID_MPEG2TS || lavc_codec->id == CODEC_ID_MPEG2VIDEO_XVMC) {
            if (lavc_param_threads > 16) lavc_param_threads = 16;
            if (lavc_param_threads > 1 && (lavc_codec->id == CODEC_ID_MPEG2VIDEO ||
              lavc_codec->id == CODEC_ID_MPEG2TS || lavc_codec->id == CODEC_ID_MPEG2VIDEO_XVMC))
                vd_use_slices = 0;
            mp_msg(MSGT_DECVIDEO, MSGL_INFO, "Spawning %d decoding thread%s...\n", lavc_param_threads, lavc_param_threads == 1 ? "" : "s");
        } else {
            lavc_param_threads = 1;
        }
    }

    if(use_slices && (lavc_codec->capabilities&CODEC_CAP_DRAW_HORIZ_BAND) && !do_vis_debug)
        ctx->do_slices=1;

    if(lavc_codec->capabilities&CODEC_CAP_DR1 && !do_vis_debug && lavc_codec->id != CODEC_ID_INTERPLAY_VIDEO && lavc_codec->id != CODEC_ID_VP8)
        ctx->do_dr1=1;
    ctx->nonref_dr = lavc_codec->id == CODEC_ID_H264;
    ctx->ip_count= ctx->b_count= 0;

    ctx->pic = avcodec_alloc_frame();
    ctx->avctx = avcodec_alloc_context3(lavc_codec);
    avctx = ctx->avctx;
    avctx->opaque = sh;
    avctx->codec_id = lavc_codec->id;

    avctx->get_format = get_format;
    if(ctx->do_dr1){
        avctx->flags|= CODEC_FLAG_EMU_EDGE;
        avctx->    get_buffer=     get_buffer;
        avctx->release_buffer= release_buffer;
        avctx->  reget_buffer=     get_buffer;
    }

    avctx->flags|= lavc_param_bitexact;

    avctx->coded_width = sh->disp_w;
    avctx->coded_height= sh->disp_h;
    avctx->workaround_bugs= lavc_param_workaround_bugs;
    switch (lavc_param_error_resilience) {
    case 5:
        avctx->err_recognition |= AV_EF_EXPLODE | AV_EF_COMPLIANT | AV_EF_CAREFUL;
        break;
    case 4:
    case 3:
        avctx->err_recognition |= AV_EF_AGGRESSIVE;
        // Fallthrough
    case 2:
        avctx->err_recognition |= AV_EF_COMPLIANT;
        // Fallthrough
    case 1:
        avctx->err_recognition |= AV_EF_CAREFUL;
    }
    lavc_param_gray|= CODEC_FLAG_GRAY;
#ifdef CODEC_FLAG2_SHOW_ALL
    if(!lavc_param_wait_keyframe) avctx->flags2 |= CODEC_FLAG2_SHOW_ALL;
#endif
    avctx->flags2|= lavc_param_fast;
    avctx->codec_tag= sh->format;
    avctx->stream_codec_tag= sh->video.fccHandler;
    avctx->idct_algo= lavc_param_idct_algo;
    avctx->error_concealment= lavc_param_error_concealment;
    avctx->debug= lavc_param_debug;
    if (lavc_param_debug)
        av_log_set_level(AV_LOG_DEBUG);
    avctx->debug_mv= lavc_param_vismv;
    avctx->skip_top   = lavc_param_skip_top;
    avctx->skip_bottom= lavc_param_skip_bottom;
    if(lavc_param_lowres_str != NULL)
    {
        sscanf(lavc_param_lowres_str, "%d,%d", &lavc_param_lowres, &lowres_w);
        if(lavc_param_lowres < 1 || lavc_param_lowres > 16 || (lowres_w > 0 && avctx->width < lowres_w))
            lavc_param_lowres = 0;
        avctx->lowres = lavc_param_lowres;
    }
    avctx->skip_loop_filter = str2AVDiscard(lavc_param_skip_loop_filter_str);
    avctx->skip_idct        = str2AVDiscard(lavc_param_skip_idct_str);
    avctx->skip_frame       = str2AVDiscard(lavc_param_skip_frame_str);

    if(lavc_avopt){
        if (parse_avopts(avctx, lavc_avopt) < 0 &&
            (!lavc_codec->priv_class ||
             parse_avopts(avctx->priv_data, lavc_avopt) < 0)) {
            mp_msg(MSGT_DECVIDEO, MSGL_ERR, "Your options /%s/ look like gibberish to me pal\n", lavc_avopt);
            uninit(sh);
            return 0;
        }
    }

    skip_idct = avctx->skip_idct;
    skip_frame = avctx->skip_frame;

    mp_dbg(MSGT_DECVIDEO, MSGL_DBG2, "libavcodec.size: %d x %d\n", avctx->width, avctx->height);
    switch (sh->format) {
    case mmioFOURCC('S','V','Q','3'):
    /* SVQ3 extradata can show up as sh->ImageDesc if demux_mov is used, or
       in the phony AVI header if demux_lavf is used. The first case is
       handled here; the second case falls through to the next section. */
        if (sh->ImageDesc) {
            avctx->extradata_size = (*(int *)sh->ImageDesc) - sizeof(int);
            avctx->extradata = av_mallocz(avctx->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
            memcpy(avctx->extradata, ((int *)sh->ImageDesc)+1, avctx->extradata_size);
            break;
        }
        /* fallthrough */

    case mmioFOURCC('A','V','R','n'):
    case mmioFOURCC('M','J','P','G'):
    /* AVRn stores huffman table in AVI header */
    /* Pegasus MJPEG stores it also in AVI header, but it uses the common
       MJPG fourcc :( */
        if (!sh->bih || sh->bih->biSize <= sizeof(*sh->bih))
            break;
        av_dict_set(&opts, "extern_huff", "1", 0);
        avctx->extradata_size = sh->bih->biSize-sizeof(*sh->bih);
        avctx->extradata = av_mallocz(avctx->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
        memcpy(avctx->extradata, sh->bih+1, avctx->extradata_size);

#if 0
        {
            int x;
            uint8_t *p = avctx->extradata;

            for (x=0; x<avctx->extradata_size; x++)
                mp_msg(MSGT_DECVIDEO, MSGL_INFO, "[%x] ", p[x]);
            mp_msg(MSGT_DECVIDEO, MSGL_INFO, "\n");
        }
#endif
        break;

    case mmioFOURCC('R', 'V', '1', '0'):
    case mmioFOURCC('R', 'V', '1', '3'):
    case mmioFOURCC('R', 'V', '2', '0'):
    case mmioFOURCC('R', 'V', '3', '0'):
    case mmioFOURCC('R', 'V', '4', '0'):
        if(sh->bih->biSize<sizeof(*sh->bih)+8){
            /* only 1 packet per frame & sub_id from fourcc */
            avctx->extradata_size= 8;
            avctx->extradata = av_mallocz(avctx->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
            ((uint32_t *)avctx->extradata)[0] = 0;
            ((uint32_t *)avctx->extradata)[1] =
                (sh->format == mmioFOURCC('R', 'V', '1', '3')) ? 0x10003001 : 0x10000000;
        } else {
            /* has extra slice header (demux_rm or rm->avi streamcopy) */
            avctx->extradata_size = sh->bih->biSize-sizeof(*sh->bih);
            avctx->extradata = av_mallocz(avctx->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
            memcpy(avctx->extradata, sh->bih+1, avctx->extradata_size);
        }
        avctx->sub_id= AV_RB32(avctx->extradata+4);

//        printf("%X %X %d %d\n", extrahdr[0], extrahdr[1]);
        break;

    default:
        if (!sh->bih || sh->bih->biSize <= sizeof(*sh->bih))
            break;
        avctx->extradata_size = sh->bih->biSize-sizeof(*sh->bih);
        avctx->extradata = av_mallocz(avctx->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
        memcpy(avctx->extradata, sh->bih+1, avctx->extradata_size);
        break;
    }

    if(sh->bih)
        avctx->bits_per_coded_sample= sh->bih->biBitCount;

    avctx->thread_count = lavc_param_threads;
    avctx->thread_type = FF_THREAD_FRAME | FF_THREAD_SLICE;
    if(lavc_codec->capabilities & CODEC_CAP_HWACCEL)
        // HACK around badly placed checks in mpeg_mc_decode_init
        set_format_params(avctx, PIX_FMT_XVMC_MPEG2_IDCT);

    /* open it */
    if (avcodec_open2(avctx, lavc_codec, &opts) < 0) {
        mp_msg(MSGT_DECVIDEO, MSGL_ERR, MSGTR_CantOpenCodec);
        uninit(sh);
        return 0;
    }
    av_dict_free(&opts);
    // this is necessary in case get_format was never called and init_vo is
    // too late e.g. for H.264 VDPAU
    set_format_params(avctx, avctx->pix_fmt);
    mp_msg(MSGT_DECVIDEO, MSGL_V, "INFO: libavcodec init OK!\n");
    return 1; //mpcodecs_config_vo(sh, sh->disp_w, sh->disp_h, IMGFMT_YV12);
}