x264.c

VLC Player Source Code

#if X264_BUILD >= 39
    var_Get( p_enc, SOUT_CFG_PREFIX "trellis", &val );
    if( val.i_int >= 0 && val.i_int <= 2 )
        p_sys->param.analyse.i_trellis = val.i_int;
#endif

#if X264_BUILD >= 41
    var_Get( p_enc, SOUT_CFG_PREFIX "b-rdo", &val );
    p_sys->param.analyse.b_bframe_rdo = val.b_bool;
#endif

#if X264_BUILD >= 42
    var_Get( p_enc, SOUT_CFG_PREFIX "fast-pskip", &val );
    p_sys->param.analyse.b_fast_pskip = val.b_bool;
#endif

#if X264_BUILD >= 43
    var_Get( p_enc, SOUT_CFG_PREFIX "bime", &val );
    p_sys->param.analyse.b_bidir_me = val.b_bool;
#endif

#if X264_BUILD >= 44
    var_Get( p_enc, SOUT_CFG_PREFIX "nr", &val );
    if( val.i_int >= 0 && val.i_int <= 1000 )
        p_sys->param.analyse.i_noise_reduction = val.i_int;
#endif

#if X264_BUILD >= 46
    var_Get( p_enc, SOUT_CFG_PREFIX "dct-decimate", &val );
    p_sys->param.analyse.b_dct_decimate = val.b_bool;
#endif

#if X264_BUILD >= 52
    var_Get( p_enc, SOUT_CFG_PREFIX "deadzone-inter", &val );
    if( val.i_int >= 0 && val.i_int <= 32 )
        p_sys->param.analyse.i_luma_deadzone[0] = val.i_int;

    var_Get( p_enc, SOUT_CFG_PREFIX "deadzone-intra", &val );
    if( val.i_int >= 0 && val.i_int <= 32 )
        p_sys->param.analyse.i_luma_deadzone[1] = val.i_int;

    var_Get( p_enc, SOUT_CFG_PREFIX "direct-8x8", &val );
    if( val.i_int >= -1 && val.i_int <= 1 )
        p_sys->param.analyse.i_direct_8x8_inference = val.i_int;
#endif

    var_Get( p_enc, SOUT_CFG_PREFIX "asm", &val );
    if( !val.b_bool ) p_sys->param.cpu = 0;

#ifndef X264_ANALYSE_BSUB16x16
#   define X264_ANALYSE_BSUB16x16 0
#endif
    var_Get( p_enc, SOUT_CFG_PREFIX "partitions", &val );
    if( !strcmp( val.psz_string, "none" ) )
    {
        p_sys->param.analyse.inter = 0;
    }
    else if( !strcmp( val.psz_string, "fast" ) )
    {
        p_sys->param.analyse.inter = X264_ANALYSE_I4x4;
    }
    else if( !strcmp( val.psz_string, "normal" ) )
    {
        p_sys->param.analyse.inter =
            X264_ANALYSE_I4x4 |
            X264_ANALYSE_PSUB16x16;
#ifdef X264_ANALYSE_I8x8
        p_sys->param.analyse.inter |= X264_ANALYSE_I8x8;
#endif
    }
    else if( !strcmp( val.psz_string, "slow" ) )
    {
        p_sys->param.analyse.inter =
            X264_ANALYSE_I4x4 |
            X264_ANALYSE_PSUB16x16 |
            X264_ANALYSE_BSUB16x16;
#ifdef X264_ANALYSE_I8x8
        p_sys->param.analyse.inter |= X264_ANALYSE_I8x8;
#endif
    }
    else if( !strcmp( val.psz_string, "all" ) )
    {
        p_sys->param.analyse.inter =
            X264_ANALYSE_I4x4 |
            X264_ANALYSE_PSUB16x16 |
            X264_ANALYSE_BSUB16x16 |
            X264_ANALYSE_PSUB8x8;
#ifdef X264_ANALYSE_I8x8
        p_sys->param.analyse.inter |= X264_ANALYSE_I8x8;
#endif
    }
    free( val.psz_string );

#if X264_BUILD >= 30
    var_Get( p_enc, SOUT_CFG_PREFIX "8x8dct", &val );
    p_sys->param.analyse.b_transform_8x8 = val.b_bool;
#endif

    if( p_enc->fmt_in.video.i_aspect > 0 )
    {
        int64_t i_num, i_den;
        unsigned int i_dst_num, i_dst_den;

        i_num = p_enc->fmt_in.video.i_aspect *
            (int64_t)p_enc->fmt_in.video.i_height;
        i_den = VOUT_ASPECT_FACTOR * p_enc->fmt_in.video.i_width;
        vlc_ureduce( &i_dst_num, &i_dst_den, i_num, i_den, 0 );

        p_sys->param.vui.i_sar_width = i_dst_num;
        p_sys->param.vui.i_sar_height = i_dst_den;
    }

    if( p_enc->fmt_in.video.i_frame_rate_base > 0 )
    {
        p_sys->param.i_fps_num = p_enc->fmt_in.video.i_frame_rate;
        p_sys->param.i_fps_den = p_enc->fmt_in.video.i_frame_rate_base;
    }

    unsigned i_cpu = vlc_CPU();
    if( !(i_cpu & CPU_CAPABILITY_MMX) )
    {
        p_sys->param.cpu &= ~X264_CPU_MMX;
    }
    if( !(i_cpu & CPU_CAPABILITY_MMXEXT) )
    {
        p_sys->param.cpu &= ~X264_CPU_MMXEXT;
    }
    if( !(i_cpu & CPU_CAPABILITY_SSE) )
    {
        p_sys->param.cpu &= ~X264_CPU_SSE;
    }
    if( !(i_cpu & CPU_CAPABILITY_SSE2) )
    {
        p_sys->param.cpu &= ~X264_CPU_SSE2;
    }

    /* BUILD 29 adds support for multi-threaded encoding while BUILD 49 (r543)
       also adds support for threads = 0 for automatically selecting an optimal
       value (cores * 1.5) based on detected CPUs. Default behavior for x264 is
       threads = 1, however VLC usage differs and uses threads = 0 (auto) by
       default unless ofcourse transcode threads is explicitly specified.. */
#if X264_BUILD >= 29
    p_sys->param.i_threads = p_enc->i_threads;
#endif

    var_Get( p_enc, SOUT_CFG_PREFIX "stats", &val );
    if( val.psz_string )
    {
        p_sys->param.rc.psz_stat_in  =
        p_sys->param.rc.psz_stat_out =
        p_sys->psz_stat_name         = val.psz_string;
    }

    var_Get( p_enc, SOUT_CFG_PREFIX "pass", &val );
    if( val.i_int > 0 && val.i_int <= 3 )
    {
        p_sys->param.rc.b_stat_write = val.i_int & 1;
        p_sys->param.rc.b_stat_read = val.i_int & 2;
    }

    /* We need to initialize pthreadw32 before we open the encoder,
       but only oncce for the whole application. Since pthreadw32
       doesn't keep a refcount, do it ourselves. */
#ifdef PTW32_STATIC_LIB
    vlc_value_t lock, count;

    var_Create( p_enc->p_libvlc, "pthread_win32_mutex", VLC_VAR_MUTEX );
    var_Get( p_enc->p_libvlc, "pthread_win32_mutex", &lock );
    vlc_mutex_lock( lock.p_address );

    var_Create( p_enc->p_libvlc, "pthread_win32_count", VLC_VAR_INTEGER );
    var_Get( p_enc->p_libvlc, "pthread_win32_count", &count );

    if( count.i_int == 0 )
    {
        msg_Dbg( p_enc, "initializing pthread-win32" );
        if( !pthread_win32_process_attach_np() || !pthread_win32_thread_attach_np() )   
        {
            msg_Warn( p_enc, "pthread Win32 Initialization failed" );
            vlc_mutex_unlock( lock.p_address );
            return VLC_EGENERIC;
        }
    }

    count.i_int++;
    var_Set( p_enc->p_libvlc, "pthread_win32_count", count );
    vlc_mutex_unlock( lock.p_address );

#endif

    /* Open the encoder */
    p_sys->h = x264_encoder_open( &p_sys->param );

    /* alloc mem */
    p_sys->i_buffer = 4 * p_enc->fmt_in.video.i_width *
        p_enc->fmt_in.video.i_height + 1000;
    p_sys->p_buffer = malloc( p_sys->i_buffer );
    if( !p_sys->p_buffer )
    {
        Close( VLC_OBJECT(p_enc) );
        return VLC_ENOMEM;
    }

    /* get the globals headers */
    p_enc->fmt_out.i_extra = 0;
    p_enc->fmt_out.p_extra = NULL;

    x264_encoder_headers( p_sys->h, &nal, &i_nal );
    for( i = 0; i < i_nal; i++ )
    {
        void *p_tmp;
        int i_size = p_sys->i_buffer;

        x264_nal_encode( p_sys->p_buffer, &i_size, 1, &nal[i] );

        p_tmp = realloc( p_enc->fmt_out.p_extra, p_enc->fmt_out.i_extra + i_size );
        if( !p_tmp )
        {
            Close( VLC_OBJECT(p_enc) );
            return VLC_ENOMEM;
        }
        p_enc->fmt_out.p_extra = p_tmp;

        memcpy( (uint8_t*)p_enc->fmt_out.p_extra + p_enc->fmt_out.i_extra,
                p_sys->p_buffer, i_size );

        p_enc->fmt_out.i_extra += i_size;
    }

    return VLC_SUCCESS;
}

/****************************************************************************
 * Encode:
 ****************************************************************************/
static block_t *Encode( encoder_t *p_enc, picture_t *p_pict )
{
    encoder_sys_t *p_sys = p_enc->p_sys;
    x264_picture_t pic;
    x264_nal_t *nal;
    block_t *p_block;
    int i_nal, i_out, i;

    /* init pic */
    memset( &pic, 0, sizeof( x264_picture_t ) );
    pic.i_pts = p_pict->date;
    pic.img.i_csp = X264_CSP_I420;
    pic.img.i_plane = p_pict->i_planes;
    for( i = 0; i < p_pict->i_planes; i++ )
    {
        pic.img.plane[i] = p_pict->p[i].p_pixels;
        pic.img.i_stride[i] = p_pict->p[i].i_pitch;
    }

#if X264_BUILD >= 0x0013
    x264_encoder_encode( p_sys->h, &nal, &i_nal, &pic, &pic );
#else
    x264_encoder_encode( p_sys->h, &nal, &i_nal, &pic );
#endif

    if( !i_nal ) return NULL;

    for( i = 0, i_out = 0; i < i_nal; i++ )
    {
        int i_size = p_sys->i_buffer - i_out;
        x264_nal_encode( p_sys->p_buffer + i_out, &i_size, 1, &nal[i] );

        i_out += i_size;
    }

    p_block = block_New( p_enc, i_out );
    if( !p_block ) return NULL;
    memcpy( p_block->p_buffer, p_sys->p_buffer, i_out );

    if( pic.i_type == X264_TYPE_IDR || pic.i_type == X264_TYPE_I )
        p_block->i_flags |= BLOCK_FLAG_TYPE_I;
    else if( pic.i_type == X264_TYPE_P )
        p_block->i_flags |= BLOCK_FLAG_TYPE_P;
    else if( pic.i_type == X264_TYPE_B )
        p_block->i_flags |= BLOCK_FLAG_TYPE_B;

    /* This isn't really valid for streams with B-frames */
    p_block->i_length = INT64_C(1000000) *
        p_enc->fmt_in.video.i_frame_rate_base /
            p_enc->fmt_in.video.i_frame_rate;

    p_block->i_pts = pic.i_pts;

    if( p_sys->param.i_bframe > 0 )
    {
        if( p_block->i_flags & BLOCK_FLAG_TYPE_B )
        {
            /* FIXME : this is wrong if bpyramid is set */
            p_block->i_dts = p_block->i_pts;
            p_sys->i_interpolated_dts = p_block->i_dts;
        }
        else
        {
            if( p_sys->i_interpolated_dts )
            {
                p_block->i_dts = p_sys->i_interpolated_dts;
            }
            else
            {
                /* Let's put something sensible */
                p_block->i_dts = p_block->i_pts;
            }

            p_sys->i_interpolated_dts += p_block->i_length;
        }
    }
    else
    {
        p_block->i_dts = p_block->i_pts;
    }

    return p_block;
}

/*****************************************************************************
 * CloseEncoder: x264 encoder destruction
 *****************************************************************************/
static void Close( vlc_object_t *p_this )
{
    encoder_t     *p_enc = (encoder_t *)p_this;
    encoder_sys_t *p_sys = p_enc->p_sys;

    free( p_sys->psz_stat_name );

    x264_encoder_close( p_sys->h );

#ifdef PTW32_STATIC_LIB
    vlc_value_t lock, count;

    var_Create( p_enc->p_libvlc, "pthread_win32_mutex", VLC_VAR_MUTEX );
    var_Get( p_enc->p_libvlc, "pthread_win32_mutex", &lock );
    vlc_mutex_lock( lock.p_address );

    var_Create( p_enc->p_libvlc, "pthread_win32_count", VLC_VAR_INTEGER );
    var_Get( p_enc->p_libvlc, "pthread_win32_count", &count );
    count.i_int--;
    var_Set( p_enc->p_libvlc, "pthread_win32_count", count );

    if( count.i_int == 0 )
    {
        pthread_win32_thread_detach_np();
        pthread_win32_process_detach_np();
        msg_Dbg( p_enc, "pthread-win32 deinitialized" );
    }
    vlc_mutex_unlock( lock.p_address );
#endif

    free( p_sys->p_buffer );
    free( p_sys );
}