C++ picture_Release函数代码示例

static picture_t *ImageConvert( image_handler_t *p_image, picture_t *p_pic,
                                video_format_t *p_fmt_in,
                                video_format_t *p_fmt_out )
{
    picture_t *p_pif;

    if( !p_fmt_out->i_width && !p_fmt_out->i_height &&
        p_fmt_out->i_sar_num && p_fmt_out->i_sar_den &&
        p_fmt_out->i_sar_num * p_fmt_in->i_sar_den !=
        p_fmt_out->i_sar_den * p_fmt_in->i_sar_num )
    {
        p_fmt_out->i_width =
            p_fmt_in->i_sar_num * (int64_t)p_fmt_out->i_sar_den *
            p_fmt_in->i_width / p_fmt_in->i_sar_den / p_fmt_out->i_sar_num;
        p_fmt_out->i_visible_width =
            p_fmt_in->i_sar_num * (int64_t)p_fmt_out->i_sar_den *
            p_fmt_in->i_visible_width / p_fmt_in->i_sar_den /
            p_fmt_out->i_sar_num;
    }

    if( !p_fmt_out->i_chroma ) p_fmt_out->i_chroma = p_fmt_in->i_chroma;
    if( !p_fmt_out->i_width )
        p_fmt_out->i_width = p_fmt_out->i_visible_width = p_fmt_in->i_width;
    if( !p_fmt_out->i_height )
        p_fmt_out->i_height = p_fmt_out->i_visible_height = p_fmt_in->i_height;
    if( !p_fmt_out->i_sar_num ) p_fmt_out->i_sar_num = p_fmt_in->i_sar_num;
    if( !p_fmt_out->i_sar_den ) p_fmt_out->i_sar_den = p_fmt_in->i_sar_den;

    if( p_image->p_filter )
    if( p_image->p_filter->fmt_in.video.i_chroma != p_fmt_in->i_chroma ||
        p_image->p_filter->fmt_out.video.i_chroma != p_fmt_out->i_chroma )
    {
        /* We need to restart a new filter */
        DeleteFilter( p_image->p_filter );
        p_image->p_filter = NULL;
    }

    /* Start a filter */
    if( !p_image->p_filter )
    {
        es_format_t fmt_in;
        es_format_Init( &fmt_in, VIDEO_ES, p_fmt_in->i_chroma );
        fmt_in.video = *p_fmt_in;

        p_image->p_filter =
            CreateFilter( p_image->p_parent, &fmt_in, p_fmt_out, NULL );

        if( !p_image->p_filter )
        {
            return NULL;
        }
    }
    else
    {
        /* Filters should handle on-the-fly size changes */
        p_image->p_filter->fmt_in.video = *p_fmt_in;
        p_image->p_filter->fmt_out.video = *p_fmt_out;
    }

    picture_Hold( p_pic );

    p_pif = p_image->p_filter->pf_video_filter( p_image->p_filter, p_pic );

    if( p_fmt_in->i_chroma == p_fmt_out->i_chroma &&
        p_fmt_in->i_width == p_fmt_out->i_width &&
        p_fmt_in->i_height == p_fmt_out->i_height )
    {
        /* Duplicate image */
        picture_Release( p_pif ); /* XXX: Better fix must be possible */
        p_pif = p_image->p_filter->pf_video_buffer_new( p_image->p_filter );
        if( p_pif )
            picture_Copy( p_pif, p_pic );
    }

    return p_pif;
}

static void VideoBufferDelete( filter_t *p_filter, picture_t *p_picture )
{
    VLC_UNUSED( p_filter );
    picture_Release( p_picture );
}

static int Open(vlc_object_t *p_this)
{
    vout_display_t *vd = (vout_display_t*)p_this;

    video_format_t fmt = vd->fmt;

    if (fmt.i_chroma != VLC_CODEC_ANDROID_OPAQUE)
        return VLC_EGENERIC;

    /* Allocate structure */
    vout_display_sys_t *sys = (struct vout_display_sys_t*)calloc(1, sizeof(*sys));
    if (!sys)
        return VLC_ENOMEM;

    sys->p_library = LoadNativeWindowAPI(&sys->native_window);
    if (!sys->p_library)
    {
        free(sys);
        msg_Err(vd, "Could not initialize NativeWindow API.");
        return VLC_EGENERIC;
    }
    sys->fmt = fmt;
    video_format_t subpicture_format = sys->fmt;
    subpicture_format.i_chroma = VLC_CODEC_RGBA;
    /* Create a RGBA picture for rendering subtitles. */
    sys->subtitles_picture = picture_NewFromFormat(&subpicture_format);

    /* Export the subpicture capability of this vout. */
    vd->info.subpicture_chromas = subpicture_chromas;

    int i_pictures = POOL_SIZE;
    picture_t** pictures = calloc(sizeof(*pictures), i_pictures);
    if (!pictures)
        goto error;
    for (int i = 0; i < i_pictures; i++)
    {
        picture_sys_t *p_picsys = calloc(1, sizeof(*p_picsys));
        if (unlikely(p_picsys == NULL))
            goto error;

        picture_resource_t resource = { .p_sys = p_picsys };
        picture_t *picture = picture_NewFromResource(&fmt, &resource);
        if (!picture)
        {
            free(p_picsys);
            goto error;
        }
        pictures[i] = picture;
    }

    /* Wrap it into a picture pool */
    picture_pool_configuration_t pool_cfg;
    memset(&pool_cfg, 0, sizeof(pool_cfg));
    pool_cfg.picture_count = i_pictures;
    pool_cfg.picture       = pictures;
    pool_cfg.lock          = LockSurface;
    pool_cfg.unlock        = UnlockSurface;

    sys->pool = picture_pool_NewExtended(&pool_cfg);
    if (!sys->pool)
    {
        for (int i = 0; i < i_pictures; i++)
            picture_Release(pictures[i]);
        goto error;
    }

    /* Setup vout_display */
    vd->sys     = sys;
    vd->fmt     = fmt;
    vd->pool    = Pool;
    vd->display = Display;
    vd->control = Control;
    vd->prepare = NULL;
    vd->manage  = Manage;

    /* Fix initial state */
    vout_display_SendEventFullscreen(vd, false);

    return VLC_SUCCESS;

error:
    free(pictures);
    Close(p_this);
    return VLC_ENOMEM;
}

static int Del( sout_stream_t *p_stream, sout_stream_id_t *id )
{
    VLC_UNUSED(id);
    sout_stream_sys_t *p_sys = p_stream->p_sys;
    bridge_t *p_bridge;
    bridged_es_t *p_es;
    bool b_last_es = true;
    int i;

    if( !p_sys->b_inited )
        return VLC_SUCCESS;

    if( p_sys->p_decoder != NULL )
    {
        decoder_owner_sys_t *p_owner = p_sys->p_decoder->p_owner;

        if( p_sys->p_decoder->p_module )
            module_unneed( p_sys->p_decoder, p_sys->p_decoder->p_module );
        if( p_sys->p_decoder->p_description )
            vlc_meta_Delete( p_sys->p_decoder->p_description );

        vlc_object_release( p_sys->p_decoder );

        free( p_owner );
    }

    /* Destroy user specified video filters */
    if( p_sys->p_vf2 )
        filter_chain_Delete( p_sys->p_vf2 );

    vlc_global_lock( VLC_MOSAIC_MUTEX );

    p_bridge = GetBridge( p_stream );
    p_es = p_sys->p_es;

    p_es->b_empty = true;
    while ( p_es->p_picture )
    {
        picture_t *p_next = p_es->p_picture->p_next;
        picture_Release( p_es->p_picture );
        p_es->p_picture = p_next;
    }

    for ( i = 0; i < p_bridge->i_es_num; i++ )
    {
        if ( !p_bridge->pp_es[i]->b_empty )
        {
            b_last_es = false;
            break;
        }
    }

    if ( b_last_es )
    {
        vlc_object_t *p_libvlc = VLC_OBJECT( p_stream->p_libvlc );
        for ( i = 0; i < p_bridge->i_es_num; i++ )
            free( p_bridge->pp_es[i] );
        free( p_bridge->pp_es );
        free( p_bridge );
        var_Destroy( p_libvlc, "mosaic-struct" );
    }

    vlc_global_unlock( VLC_MOSAIC_MUTEX );

    if ( p_sys->p_image )
    {
        image_HandlerDelete( p_sys->p_image );
    }

    p_sys->b_inited = false;

    return VLC_SUCCESS;
}

inline static void video_del_buffer_filter( filter_t *p_this,
                                            picture_t *p_pic )
{
    VLC_UNUSED(p_this);
    picture_Release( p_pic );
}

/*****************************************************************************
 * Render: displays previously rendered output
 *****************************************************************************
 * This function send the currently rendered image to Invert image, waits
 * until it is displayed and switch the two rendering buffers, preparing next
 * frame.
 *****************************************************************************/
static picture_t *Filter( filter_t *p_filter, picture_t *p_pic )
{
    picture_t *p_outpic;
    int i_index;
    int i_planes;

    if( !p_pic ) return NULL;

    p_outpic = filter_NewPicture( p_filter );
    if( !p_outpic )
    {
        msg_Warn( p_filter, "can't get output picture" );
        picture_Release( p_pic );
        return NULL;
    }

    if( p_pic->format.i_chroma == VLC_CODEC_YUVA )
    {
        /* We don't want to invert the alpha plane */
        i_planes = p_pic->i_planes - 1;
        memcpy(
            p_outpic->p[A_PLANE].p_pixels, p_pic->p[A_PLANE].p_pixels,
            p_pic->p[A_PLANE].i_pitch *  p_pic->p[A_PLANE].i_lines );
    }
    else
    {
        i_planes = p_pic->i_planes;
    }

    for( i_index = 0 ; i_index < i_planes ; i_index++ )
    {
        uint8_t *p_in, *p_in_end, *p_line_end, *p_out;

        p_in = p_pic->p[i_index].p_pixels;
        p_in_end = p_in + p_pic->p[i_index].i_visible_lines
                           * p_pic->p[i_index].i_pitch;

        p_out = p_outpic->p[i_index].p_pixels;

        for( ; p_in < p_in_end ; )
        {
            uint64_t *p_in64, *p_out64;

            p_line_end = p_in + p_pic->p[i_index].i_visible_pitch - 64;

            p_in64 = (uint64_t*)p_in;
            p_out64 = (uint64_t*)p_out;

            while( p_in64 < (uint64_t *)p_line_end )
            {
                /* Do 64 pixels at a time */
                *p_out64++ = ~*p_in64++; *p_out64++ = ~*p_in64++;
                *p_out64++ = ~*p_in64++; *p_out64++ = ~*p_in64++;
                *p_out64++ = ~*p_in64++; *p_out64++ = ~*p_in64++;
                *p_out64++ = ~*p_in64++; *p_out64++ = ~*p_in64++;
            }

            p_in = (uint8_t*)p_in64;
            p_out = (uint8_t*)p_out64;
            p_line_end += 64;

            for( ; p_in < p_line_end ; )
            {
                *p_out++ = ~( *p_in++ );
            }

            p_in += p_pic->p[i_index].i_pitch
                     - p_pic->p[i_index].i_visible_pitch;
            p_out += p_outpic->p[i_index].i_pitch
                     - p_outpic->p[i_index].i_visible_pitch;
        }
    }

    return CopyInfoAndRelease( p_outpic, p_pic );
}

/*****************************************************************************
 * Run the filter on a Packed YUV picture
 *****************************************************************************/
static picture_t *FilterPacked( filter_t *p_filter, picture_t *p_pic )
{
    int pi_luma[256];
    int pi_gamma[256];

    picture_t *p_outpic;
    uint8_t *p_in, *p_in_end, *p_line_end;
    uint8_t *p_out;
    int i_y_offset, i_u_offset, i_v_offset;

    int i_pitch, i_visible_pitch;

    bool b_thres;
    double  f_hue;
    double  f_gamma;
    int32_t i_cont, i_lum;
    int i_sat, i_sin, i_cos, i_x, i_y;
    int i;

    filter_sys_t *p_sys = p_filter->p_sys;

    if( !p_pic ) return NULL;

    i_pitch = p_pic->p->i_pitch;
    i_visible_pitch = p_pic->p->i_visible_pitch;

    if( GetPackedYuvOffsets( p_pic->format.i_chroma, &i_y_offset,
                             &i_u_offset, &i_v_offset ) != VLC_SUCCESS )
    {
        msg_Warn( p_filter, "Unsupported input chroma (%4.4s)",
                  (char*)&(p_pic->format.i_chroma) );

        picture_Release( p_pic );
        return NULL;
    }

    p_outpic = filter_NewPicture( p_filter );
    if( !p_outpic )
    {
        msg_Warn( p_filter, "can't get output picture" );

        picture_Release( p_pic );
        return NULL;
    }

    /* Get variables */
    vlc_mutex_lock( &p_sys->lock );
    i_cont = (int)( p_sys->f_contrast * 255 );
    i_lum = (int)( (p_sys->f_brightness - 1.0)*255 );
    f_hue = p_sys->f_hue * (float)(M_PI / 180.);
    i_sat = (int)( p_sys->f_saturation * 256 );
    f_gamma = 1.0 / p_sys->f_gamma;
    b_thres = p_sys->b_brightness_threshold;
    vlc_mutex_unlock( &p_sys->lock );

    /*
     * Threshold mode drops out everything about luma, contrast and gamma.
     */
    if( !b_thres )
    {

        /* Contrast is a fast but kludged function, so I put this gap to be
         * cleaner :) */
        i_lum += 128 - i_cont / 2;

        /* Fill the gamma lookup table */
        for( i = 0 ; i < 256 ; i++ )
        {
          pi_gamma[ i ] = clip_uint8_vlc( pow(i / 255.0, f_gamma) * 255.0);
        }

        /* Fill the luma lookup table */
        for( i = 0 ; i < 256 ; i++ )
        {
            pi_luma[ i ] = pi_gamma[clip_uint8_vlc( i_lum + i_cont * i / 256)];
        }
    }
    else
    {
        /*
         * We get luma as threshold value: the higher it is, the darker is
         * the image. Should I reverse this?
         */
        for( i = 0 ; i < 256 ; i++ )
        {
            pi_luma[ i ] = (i < i_lum) ? 0 : 255;
        }

        /*
         * Desaturates image to avoid that strange yellow halo...
         */
        i_sat = 0;
    }

    /*
     * Do the Y plane
     */
//.........这里部分代码省略.........

/*****************************************************************************
 * Command functions
 *****************************************************************************/
static int exec_DataSharedMem( filter_t *p_filter,
                               const commandparams_t *p_params,
                               commandparams_t *p_results )
{
#if defined(HAVE_SYS_SHM_H)
    filter_sys_t *p_sys = (filter_sys_t*) p_filter->p_sys;
    struct shmid_ds shminfo;
    overlay_t *p_ovl;
    size_t i_size;

    VLC_UNUSED(p_results);

    p_ovl = ListGet( &p_sys->overlays, p_params->i_id );
    if( p_ovl == NULL )
    {
        msg_Err( p_filter, "Invalid overlay: %d", p_params->i_id );
        return VLC_EGENERIC;
    }

    if( shmctl( p_params->i_shmid, IPC_STAT, &shminfo ) == -1 )
    {
        msg_Err( p_filter, "Unable to access shared memory" );
        return VLC_EGENERIC;
    }
    i_size = shminfo.shm_segsz;

    if( p_params->fourcc == VLC_CODEC_TEXT )
    {
        char *p_data;

        if( (p_params->i_height != 1) || (p_params->i_width < 1) )
        {
            msg_Err( p_filter,
                     "Invalid width and/or height. when specifying text height "
                     "must be 1 and width the number of bytes in the string, "
                     "including the null terminator" );
            return VLC_EGENERIC;
        }

        if( (size_t)p_params->i_width > i_size )
        {
            msg_Err( p_filter,
                     "Insufficient data in shared memory. need %d, got %zu",
                     p_params->i_width, i_size );
            return VLC_EGENERIC;
        }

        p_ovl->data.p_text = malloc( p_params->i_width );
        if( p_ovl->data.p_text == NULL )
        {
            msg_Err( p_filter, "Unable to allocate string storage" );
            return VLC_ENOMEM;
        }

        video_format_Setup( &p_ovl->format, VLC_CODEC_TEXT,
                            0, 0, 0, 1 );

        p_data = shmat( p_params->i_shmid, NULL, SHM_RDONLY );
        if( p_data == NULL )
        {
            msg_Err( p_filter, "Unable to attach to shared memory" );
            free( p_ovl->data.p_text );
            p_ovl->data.p_text = NULL;
            return VLC_ENOMEM;
        }
        memcpy( p_ovl->data.p_text, p_data, p_params->i_width );

        shmdt( p_data );
    }
    else
    {
        uint8_t *p_data, *p_in;
        size_t i_neededsize = 0;

        p_ovl->data.p_pic = picture_New( p_params->fourcc,
                                         p_params->i_width, p_params->i_height,
                                         1, 1 );
        if( p_ovl->data.p_pic == NULL )
            return VLC_ENOMEM;

        p_ovl->format = p_ovl->data.p_pic->format;

        for( size_t i_plane = 0; i_plane < (size_t)p_ovl->data.p_pic->i_planes;
             ++i_plane )
        {
            i_neededsize += p_ovl->data.p_pic->p[i_plane].i_visible_lines *
                            p_ovl->data.p_pic->p[i_plane].i_visible_pitch;
        }

        if( i_neededsize > i_size )
        {
            msg_Err( p_filter,
                     "Insufficient data in shared memory. need %zu, got %zu",
                     i_neededsize, i_size );
            picture_Release( p_ovl->data.p_pic );
            p_ovl->data.p_pic = NULL;
            return VLC_EGENERIC;
//.........这里部分代码省略.........

/**
 * Return a direct buffer
 */
static picture_pool_t *Pool (vout_display_t *vd, unsigned requested_count)
{
    vout_display_sys_t *sys = vd->sys;
    (void)requested_count;

    if (sys->pool)
        return sys->pool;

    vout_display_place_t place;

    vout_display_PlacePicture (&place, &vd->source, vd->cfg, false);

    /* */
    const uint32_t values[] = { place.x, place.y, place.width, place.height };
    xcb_configure_window (sys->conn, sys->window,
                          XCB_CONFIG_WINDOW_X | XCB_CONFIG_WINDOW_Y |
                          XCB_CONFIG_WINDOW_WIDTH | XCB_CONFIG_WINDOW_HEIGHT,
                          values);

    picture_t *pic = picture_NewFromFormat (&vd->fmt);
    if (!pic)
        return NULL;

    assert (pic->i_planes == 1);

    picture_resource_t res = {
        .p = {
            [0] = {
                .i_lines = pic->p->i_lines,
                .i_pitch = pic->p->i_pitch,
            },
        },
    };
    picture_Release (pic);

    unsigned count;
    picture_t *pic_array[MAX_PICTURES];
    const size_t size = res.p->i_pitch * res.p->i_lines;
    for (count = 0; count < MAX_PICTURES; count++)
    {
        xcb_shm_seg_t seg = (sys->seg_base != 0) ? (sys->seg_base + count) : 0;

        if (XCB_picture_Alloc (vd, &res, size, sys->conn, seg))
            break;
        pic_array[count] = XCB_picture_NewFromResource (&vd->fmt, &res);
        if (unlikely(pic_array[count] == NULL))
        {
            if (seg != 0)
                xcb_shm_detach (sys->conn, seg);
            break;
        }
    }
    xcb_flush (sys->conn);

    if (count == 0)
        return NULL;

    sys->pool = picture_pool_New (count, pic_array);
    if (unlikely(sys->pool == NULL))
        while (count > 0)
            picture_Release(pic_array[--count]);
    return sys->pool;
}

//.........这里部分代码省略.........
                                p_sys->i_vnc_width, p_sys->i_vnc_height, 1, 1 );
    if( !p_sys->p_pic )
    {
        vlc_mutex_unlock( &p_sys->lock );
        goto exit;
    }
	p_sys->i_vnc_pixels = p_sys->i_vnc_width * p_sys->i_vnc_height;

    vlc_mutex_unlock( &p_sys->lock );

    /* create the update request thread */
    p_update_request_thread = vlc_object_create( p_filter,
                                                 sizeof( vlc_object_t ) );
    vlc_object_attach( p_update_request_thread, p_filter );
    if( vlc_thread_create( p_update_request_thread,
                           update_request_thread, VLC_THREAD_PRIORITY_LOW ) )
    {
        vlc_object_release( p_update_request_thread );
        msg_Err( p_filter, "cannot spawn vnc update request thread" );
        goto exit;
    }

    /* connection is initialized, now read and handle server messages */
    while( vlc_object_alive( p_thread_obj ) )
    {
        rfbServerToClientMsg msg;
        int i_msgSize;

        memset( &msg, 0, sizeof(msg) );

        if( !read_exact(p_filter, p_sys->i_socket, (char*)&msg, 1 ) )
        {
            msg_Err( p_filter, "Error while waiting for next server message");
            break;
        }
        switch (msg.type)
        {
        case rfbFramebufferUpdate:
            i_msgSize = sz_rfbFramebufferUpdateMsg;
            break;
        case rfbSetColourMapEntries:
            i_msgSize = sz_rfbSetColourMapEntriesMsg;
            break;
        case rfbBell:
            i_msgSize = sz_rfbBellMsg;
            break;
        case rfbServerCutText:
            i_msgSize = sz_rfbServerCutTextMsg;
            break;
        case rfbReSizeFrameBuffer:
            i_msgSize = sz_rfbReSizeFrameBufferMsg;
            break;
        default:
            i_msgSize = 0;
            msg_Err( p_filter, "Invalid message %u received", msg.type );
            break;
        }

        if( i_msgSize <= 0 )
            break;

        if( --i_msgSize > 0 )
        {
            if ( !read_exact( p_filter, p_sys->i_socket,
                              ((char*)&msg)+1, i_msgSize ) )
            {
                msg_Err( p_filter, "Error while reading message of type %u",
                         msg.type );
                break;
            }
        }
        process_server_message( p_filter, &msg);
    }

    msg_Dbg( p_filter, "joining update_request_thread" );
    vlc_object_kill( p_update_request_thread );
    vlc_thread_join( p_update_request_thread );
    vlc_object_release( p_update_request_thread );
    msg_Dbg( p_filter, "released update_request_thread" );

exit:

    vlc_mutex_lock( &p_sys->lock );
    p_sys->b_connection_active = false;

    if (p_sys->i_socket >= 0)
        net_Close(p_sys->i_socket);

    if( p_sys->p_pic )
        picture_Release( p_sys->p_pic );

    /* It will hide the subtitle */
    p_sys->b_continue = false;
    p_sys->b_need_update = true;
    vlc_mutex_unlock( &p_sys->lock );

    msg_Dbg( p_filter, "VNC message reader thread ended" );
    vlc_restorecancel (canc);
    return NULL;
}

//.........这里部分代码省略.........
    }
    if (omx_error != OMX_ErrorNone) {
        p_sys->port.i_buffers = i;
        for (i = 0; i < p_sys->port.i_buffers; i++)
            OMX_FreeBuffer(p_sys->omx_handle, p_sys->port.i_port_index, p_sys->port.pp_buffers[i]);
        msg_Err(vd, "OMX_AllocateBuffer failed (%x: %s)",
                omx_error, ErrorToString(omx_error));
        goto error;
    }

    omx_error = WaitForSpecificOmxEvent(&p_sys->event_queue, OMX_EventCmdComplete, 0, 0, 0);
    CHECK_ERROR(omx_error, "Wait for Idle failed (%x: %s)",
                omx_error, ErrorToString(omx_error));

    omx_error = OMX_SendCommand(p_sys->omx_handle, OMX_CommandStateSet,
                                OMX_StateExecuting, 0);
    CHECK_ERROR(omx_error, "OMX_CommandStateSet Executing failed (%x: %s)",
                omx_error, ErrorToString(omx_error));
    omx_error = WaitForSpecificOmxEvent(&p_sys->event_queue, OMX_EventCmdComplete, 0, 0, 0);
    CHECK_ERROR(omx_error, "Wait for Executing failed (%x: %s)",
                omx_error, ErrorToString(omx_error));

    if (!strcmp(p_sys->psz_component, "OMX.broadcom.video_render")) {
        OMX_CONFIG_DISPLAYREGIONTYPE config_display;
        OMX_INIT_STRUCTURE(config_display);
        config_display.nPortIndex = p_sys->port.i_port_index;

        config_display.set = OMX_DISPLAY_SET_SRC_RECT;
        config_display.src_rect.width = vd->cfg->display.width;
        config_display.src_rect.height = vd->cfg->display.height;
        OMX_SetConfig(p_sys->omx_handle, OMX_IndexConfigDisplayRegion, &config_display);
        config_display.set = OMX_DISPLAY_SET_FULLSCREEN;
        config_display.fullscreen = OMX_TRUE;
        OMX_SetConfig(p_sys->omx_handle, OMX_IndexConfigDisplayRegion, &config_display);

        UpdateDisplaySize(vd, vd->cfg);
    }


    /* Setup chroma */
    video_format_t fmt = vd->fmt;

    fmt.i_chroma = VLC_CODEC_I420;
    video_format_FixRgb(&fmt);

    /* Setup vout_display */
    vd->fmt     = fmt;
    vd->pool    = Pool;
    vd->display = Display;
    vd->control = Control;
    vd->prepare = NULL;
    vd->manage  = NULL;

    /* Create the associated picture */
    pictures = calloc(p_sys->port.i_buffers, sizeof(*pictures));
    if (!pictures)
        goto error;
    for (unsigned int i = 0; i < p_sys->port.i_buffers; i++) {
        picture_sys_t *picsys = malloc(sizeof(*picsys));
        if (unlikely(picsys == NULL))
            goto error;
        picsys->sys = p_sys;

        picture_resource_t resource = { .p_sys = picsys };

        picture_t *picture = picture_NewFromResource(&fmt, &resource);
        if (unlikely(picture == NULL))
        {
            free(picsys);
            goto error;
        }
        pictures[i] = picture;
    }

    /* Wrap it into a picture pool */
    picture_pool_configuration_t pool_cfg;
    memset(&pool_cfg, 0, sizeof(pool_cfg));
    pool_cfg.picture_count = p_sys->port.i_buffers;
    pool_cfg.picture       = pictures;
    pool_cfg.lock          = LockSurface;
    pool_cfg.unlock        = UnlockSurface;

    p_sys->pool = picture_pool_NewExtended(&pool_cfg);
    if (!p_sys->pool) {
        for (unsigned int i = 0; i < p_sys->port.i_buffers; i++)
            picture_Release(pictures[i]);
        goto error;
    }

    /* Fix initial state */
    vout_display_SendEventFullscreen(vd, true);

    free(pictures);
    return VLC_SUCCESS;

error:
    free(pictures);
    Close(p_this);
    return VLC_EGENERIC;
}

/*****************************************************************************
 * Render: displays previously rendered output
 *****************************************************************************
 * This function send the currently rendered image to Distort image, waits
 * until it is displayed and switch the two rendering buffers, preparing next
 * frame.
 *****************************************************************************/
static picture_t *Filter( filter_t *p_filter, picture_t *p_pic )
{
    picture_t *p_outpic;

    unsigned int w, h;
    uint8_t u,v;

    picture_t *p_converted;
    video_format_t fmt_out;
    memset( &fmt_out, 0, sizeof(video_format_t) );
    fmt_out.p_palette = NULL;

    if( !p_pic ) return NULL;

    p_outpic = filter_NewPicture( p_filter );
    if( !p_outpic )
    {
        picture_Release( p_pic );
        return NULL;
    }

    if( !p_filter->p_sys->p_image )
        p_filter->p_sys->p_image = image_HandlerCreate( p_filter );

    /* chrominance */
    u = p_filter->p_sys->u;
    v = p_filter->p_sys->v;
    for( int y = 0; y < p_outpic->p[U_PLANE].i_lines; y++ )
    {
        memset(
                p_outpic->p[U_PLANE].p_pixels+y*p_outpic->p[U_PLANE].i_pitch,
                u, p_outpic->p[U_PLANE].i_pitch );
        memset(
                p_outpic->p[V_PLANE].p_pixels+y*p_outpic->p[V_PLANE].i_pitch,
                v, p_outpic->p[V_PLANE].i_pitch );
        if( v == 0 && u != 0 )
            u --;
        else if( u == 0xff )
            v --;
        else if( v == 0xff )
            u ++;
        else if( u == 0 )
            v ++;
    }

    /* luminance */
    plane_CopyPixels( &p_outpic->p[Y_PLANE], &p_pic->p[Y_PLANE] );

    /* image visualization */
    fmt_out = p_filter->fmt_out.video;
    fmt_out.i_width = p_filter->fmt_out.video.i_width*p_filter->p_sys->scale/150;
    fmt_out.i_height = p_filter->fmt_out.video.i_height*p_filter->p_sys->scale/150;
    fmt_out.i_visible_width = fmt_out.i_width;
    fmt_out.i_visible_height = fmt_out.i_height;
    p_converted = image_Convert( p_filter->p_sys->p_image, p_pic,
                                 &(p_pic->format), &fmt_out );

    if( p_converted )
    {
#define copyimage( plane, b ) \
        for( int y = 0; y<p_converted->p[plane].i_visible_lines; y++ ) { \
        for( int x = 0; x<p_converted->p[plane].i_visible_pitch; x++ ) { \
            int nx, ny; \
            if( p_filter->p_sys->yinc == 1 ) \
                ny= y; \
            else \
                ny = p_converted->p[plane].i_visible_lines-y; \
            if( p_filter->p_sys->xinc == 1 ) \
                nx = x; \
            else \
                nx = p_converted->p[plane].i_visible_pitch-x; \
            p_outpic->p[plane].p_pixels[(p_filter->p_sys->x*b+nx)+(ny+p_filter->p_sys->y*b)*p_outpic->p[plane].i_pitch ] = p_converted->p[plane].p_pixels[y*p_converted->p[plane].i_pitch+x]; \
        } }
        copyimage( Y_PLANE, 2 );
        copyimage( U_PLANE, 1 );
        copyimage( V_PLANE, 1 );
#undef copyimage

        picture_Release( p_converted );
    }
    else
    {
        msg_Err( p_filter, "Image scaling failed miserably." );
    }

    p_filter->p_sys->x += p_filter->p_sys->xinc;
    p_filter->p_sys->y += p_filter->p_sys->yinc;

    p_filter->p_sys->scale += p_filter->p_sys->scaleinc;
    if( p_filter->p_sys->scale >= 50 ) p_filter->p_sys->scaleinc = -1;
    if( p_filter->p_sys->scale <= 1 ) p_filter->p_sys->scaleinc = 1;

    w = p_filter->fmt_out.video.i_width*p_filter->p_sys->scale/150;
//.........这里部分代码省略.........

static void video_unlink_picture( decoder_t *p_dec, picture_t *p_pic )
{
    (void)p_dec;
    picture_Release( p_pic );
}

static void video_del_buffer( decoder_t *p_dec, picture_t *p_pic )
{
    (void)p_dec;
    picture_Release( p_pic );
}

static void* EncoderThread( void *obj )
{
    sout_stream_sys_t *p_sys = (sout_stream_sys_t*)obj;
    sout_stream_id_sys_t *id = p_sys->id_video;
    picture_t *p_pic = NULL;
    int canc = vlc_savecancel ();
    block_t *p_block = NULL;

    for( ;; )
    {

        vlc_mutex_lock( &p_sys->lock_out );
        while( !p_sys->b_abort &&
               (p_pic = picture_fifo_Pop( p_sys->pp_pics )) == NULL )
            vlc_cond_wait( &p_sys->cond, &p_sys->lock_out );

        if( p_sys->b_abort && !p_pic )
        {
            vlc_mutex_unlock( &p_sys->lock_out );
            break;
        }
        vlc_mutex_unlock( &p_sys->lock_out );

        if( p_pic )
        {
            p_block = id->p_encoder->pf_encode_video( id->p_encoder, p_pic );

            vlc_mutex_lock( &p_sys->lock_out );
            block_ChainAppend( &p_sys->p_buffers, p_block );

            vlc_mutex_unlock( &p_sys->lock_out );
            picture_Release( p_pic );
        }

        vlc_mutex_lock( &p_sys->lock_out );
        if( p_sys->b_abort )
        {
            vlc_mutex_unlock( &p_sys->lock_out );
            break;
        }
        vlc_mutex_unlock( &p_sys->lock_out );
    }

    /*Encode what we have in the buffer on closing*/
    vlc_mutex_lock( &p_sys->lock_out );
    while( (p_pic = picture_fifo_Pop( p_sys->pp_pics )) != NULL )
    {
        p_block = id->p_encoder->pf_encode_video( id->p_encoder, p_pic );

        block_ChainAppend( &p_sys->p_buffers, p_block );

        picture_Release( p_pic );
    }

    /*Now flush encoder*/
    do {
       p_block = id->p_encoder->pf_encode_video(id->p_encoder, NULL );
       block_ChainAppend( &p_sys->p_buffers, p_block );
    } while( p_block );

    vlc_mutex_unlock( &p_sys->lock_out );


    vlc_restorecancel (canc);
    return NULL;
}