x264.c

video linux conference

#if X264_BUILD >= 0x000a
        p_sys->param.rc.i_qp_constant = val.i_int;
        p_sys->param.rc.i_qp_min = i_qmin;
        p_sys->param.rc.i_qp_max = i_qmax;
#else
        p_sys->param.i_qp_constant = val.i_int;
#endif
    }
    else
    {
        /* No QP -> constant bitrate */
#if X264_BUILD >= 0x000a
        p_sys->param.rc.b_cbr = 1;
        p_sys->param.rc.i_bitrate = p_enc->fmt_out.i_bitrate / 1000;

#if X264_BUILD >= 24
        var_Get( p_enc, SOUT_CFG_PREFIX "tolerance", &val );
        p_sys->param.rc.f_rate_tolerance = val.f_float;

        var_Get( p_enc, SOUT_CFG_PREFIX "vbv-maxrate", &val );
        p_sys->param.rc.i_vbv_max_bitrate = val.i_int;

        var_Get( p_enc, SOUT_CFG_PREFIX "vbv-bufsize", &val );
        p_sys->param.rc.i_vbv_buffer_size = val.i_int;
        if( !val.i_int )
            p_sys->param.rc.i_vbv_buffer_size = p_sys->param.rc.i_bitrate;

        var_Get( p_enc, SOUT_CFG_PREFIX "vbv-init", &val );
        p_sys->param.rc.f_vbv_buffer_init = val.f_float;
#else
        p_sys->param.rc.i_rc_buffer_size = p_sys->param.rc.i_bitrate;
        p_sys->param.rc.i_rc_init_buffer = p_sys->param.rc.i_bitrate / 4;
#endif
#endif
    }

    var_Get( p_enc, SOUT_CFG_PREFIX "cabac", &val );
    p_sys->param.b_cabac = val.b_bool;

    var_Get( p_enc, SOUT_CFG_PREFIX "loopfilter", &val );
    p_sys->param.b_deblocking_filter = val.b_bool;

    var_Get( p_enc, SOUT_CFG_PREFIX "keyint", &val );
#if X264_BUILD >= 0x000e
    if( val.i_int > 0 ) p_sys->param.i_keyint_max = val.i_int;
    if( val.i_int > 0 ) p_sys->param.i_keyint_min = val.i_int * 0.4;
#else
    if( val.i_int > 0 ) p_sys->param.i_iframe = val.i_int;
#endif

    var_Get( p_enc, SOUT_CFG_PREFIX "keyint-min", &val );
#if X264_BUILD >= 0x000e
    if( val.i_int > 0 ) p_sys->param.i_keyint_min = val.i_int;
#else
    if( val.i_int > 0 ) p_sys->param.i_idrframe = val.i_int;
#endif

    var_Get( p_enc, SOUT_CFG_PREFIX "bframes", &val );
    if( val.i_int >= 0 && val.i_int <= 16 ) p_sys->param.i_bframe = val.i_int;

#if X264_BUILD >= 22
    var_Get( p_enc, SOUT_CFG_PREFIX "bpyramid", &val );
    p_sys->param.b_bframe_pyramid = val.b_bool;
#endif

    var_Get( p_enc, SOUT_CFG_PREFIX "frameref", &val );
    if( val.i_int > 0 && val.i_int <= 15 )
        p_sys->param.i_frame_reference = val.i_int;

    var_Get( p_enc, SOUT_CFG_PREFIX "scenecut", &val );
#if X264_BUILD >= 0x000b
    if( val.i_int >= -1 && val.i_int <= 100 )
        p_sys->param.i_scenecut_threshold = val.i_int;
#endif

#if X264_BUILD >= 22
    var_Get( p_enc, SOUT_CFG_PREFIX "subpel", &val );
    if( val.i_int >= 1 && val.i_int <= 5 )
        p_sys->param.analyse.i_subpel_refine = val.i_int;
#endif

    var_Get( p_enc, SOUT_CFG_PREFIX "analyse", &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;
    }
    else if( !strcmp( val.psz_string, "all" ) )
    {
#ifndef X264_ANALYSE_BSUB16x16
#   define X264_ANALYSE_BSUB16x16 0
#endif
        p_sys->param.analyse.inter =
            X264_ANALYSE_I4x4 | X264_ANALYSE_PSUB16x16 | X264_ANALYSE_PSUB8x8 |
            X264_ANALYSE_BSUB16x16;
    }
    if( val.psz_string ) free( val.psz_string );

    if( p_enc->fmt_in.video.i_aspect > 0 )
    {
        int64_t i_num, i_den;
        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_reduce( &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;
    }
    if( !(p_enc->p_libvlc->i_cpu & CPU_CAPABILITY_MMX) )
    {
        p_sys->param.cpu &= ~X264_CPU_MMX;
    }
    if( !(p_enc->p_libvlc->i_cpu & CPU_CAPABILITY_MMXEXT) )
    {
        p_sys->param.cpu &= ~X264_CPU_MMXEXT;
    }
    if( !(p_enc->p_libvlc->i_cpu & CPU_CAPABILITY_SSE) )
    {
        p_sys->param.cpu &= ~X264_CPU_SSE;
    }
    if( !(p_enc->p_libvlc->i_cpu & CPU_CAPABILITY_SSE2) )
    {
        p_sys->param.cpu &= ~X264_CPU_SSE2;
    }

#if X264_BUILD >= 29
    if( p_enc->i_threads >= 1 )
        p_sys->param.i_threads = p_enc->i_threads;
#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 );

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

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

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

        p_enc->fmt_out.p_extra = realloc( p_enc->fmt_out.p_extra, p_enc->fmt_out.i_extra + i_size );

        memcpy( 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;
    }
#endif

    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 );
    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 = I64C(1000000) *
        p_enc->fmt_in.video.i_frame_rate_base /
            p_enc->fmt_in.video.i_frame_rate;

    p_block->i_dts = p_block->i_pts = pic.i_pts;

    if( p_sys->param.i_bframe > 0 )
    {
        if( p_block->i_flags & BLOCK_FLAG_TYPE_B )
        {
            p_block->i_dts = p_block->i_pts;
        }
        else
        {
            if( p_sys->i_last_ref_pts )
            {
                p_block->i_dts = p_sys->i_last_ref_pts;
            }
            else
            {
                /* Let's put something sensible */
                p_block->i_dts = p_block->i_pts;
            }

            p_sys->i_last_ref_pts = p_block->i_pts;
        }
    }

    return p_block;
}

/*****************************************************************************
 * CloseEncoder: ffmpeg 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;

    x264_encoder_close( p_sys->h );
    free( p_sys->p_buffer );
    free( p_sys );
}