C++ picture_NewFromFormat函数代码示例

subpicture_region_t *subpicture_region_New( const video_format_t *p_fmt )
{
    subpicture_region_t *p_region = calloc( 1, sizeof(*p_region ) );
    if( !p_region )
        return NULL;

    p_region->fmt = *p_fmt;
    p_region->fmt.p_palette = NULL;
    if( p_fmt->i_chroma == VLC_CODEC_YUVP )
    {
        p_region->fmt.p_palette = calloc( 1, sizeof(*p_region->fmt.p_palette) );
        if( p_fmt->p_palette )
            *p_region->fmt.p_palette = *p_fmt->p_palette;
    }
    p_region->i_alpha = 0xff;

    if( p_fmt->i_chroma == VLC_CODEC_TEXT )
        return p_region;

    p_region->p_picture = picture_NewFromFormat( p_fmt );
    if( !p_region->p_picture )
    {
        free( p_region->fmt.p_palette );
        free( p_region );
        return NULL;
    }

    return p_region;
}

static picture_t *video_new_buffer( vlc_object_t *p_this,
                                    decoder_owner_sys_t *p_sys,
                                    es_format_t *fmt_out )
{
    VLC_UNUSED(p_this);
    if( fmt_out->video.i_width != p_sys->video.i_width ||
        fmt_out->video.i_height != p_sys->video.i_height ||
        fmt_out->video.i_chroma != p_sys->video.i_chroma ||
        (int64_t)fmt_out->video.i_sar_num * p_sys->video.i_sar_den !=
        (int64_t)fmt_out->video.i_sar_den * p_sys->video.i_sar_num )
    {
        vlc_ureduce( &fmt_out->video.i_sar_num,
                     &fmt_out->video.i_sar_den,
                     fmt_out->video.i_sar_num,
                     fmt_out->video.i_sar_den, 0 );

        if( !fmt_out->video.i_visible_width ||
            !fmt_out->video.i_visible_height )
        {
            fmt_out->video.i_visible_width = fmt_out->video.i_width;
            fmt_out->video.i_visible_height = fmt_out->video.i_height;
        }

        fmt_out->video.i_chroma = fmt_out->i_codec;
        p_sys->video = fmt_out->video;
    }

    /* */
    fmt_out->video.i_chroma = fmt_out->i_codec;

    return picture_NewFromFormat( &fmt_out->video );
}

/**
 * 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,
                                                        sys->conn);
        if (unlikely(pic_array[count] == NULL))
            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;
}

/*****************************************************************************
 * Create
 *****************************************************************************/
static int Create( vlc_object_t *p_this )
{
    filter_t *p_filter = (filter_t *)p_this;

    /* Allocate structure */
    p_filter->p_sys = malloc( sizeof( filter_sys_t ) );
    if( p_filter->p_sys == NULL )
        return VLC_ENOMEM;

    p_filter->p_sys->p_tmp = picture_NewFromFormat( &p_filter->fmt_in.video );
    if( !p_filter->p_sys->p_tmp )
    {
        free( p_filter->p_sys );
        return VLC_ENOMEM;
    }
    p_filter->p_sys->b_first = true;

    p_filter->pf_video_filter = Filter;

    config_ChainParse( p_filter, FILTER_PREFIX, ppsz_filter_options,
                       p_filter->p_cfg );

    p_filter->p_sys->i_factor =
        var_CreateGetIntegerCommand( p_filter, FILTER_PREFIX "factor" );
    vlc_spin_init( &p_filter->p_sys->lock );
    var_AddCallback( p_filter, FILTER_PREFIX "factor",
                     MotionBlurCallback, p_filter->p_sys );


    return VLC_SUCCESS;
}

subpicture_region_t *subpicture_region_New( const video_format_t *p_fmt )
{
    subpicture_region_t *p_region = (subpicture_region_t *)calloc( 1, sizeof(*p_region ) );			// sunqueen modify
    if( !p_region )
        return NULL;

    p_region->fmt = *p_fmt;
    p_region->fmt.p_palette = NULL;
    if( p_fmt->i_chroma == VLC_CODEC_YUVP )
    {
        p_region->fmt.p_palette = (video_palette_t *)calloc( 1, sizeof(*p_region->fmt.p_palette) );			// sunqueen modify
        if( p_fmt->p_palette )
            *p_region->fmt.p_palette = *p_fmt->p_palette;
    }
    p_region->i_alpha = 0xff;
    p_region->p_next = NULL;
    p_region->p_private = NULL;
    p_region->psz_text = NULL;
    p_region->p_style = NULL;
    p_region->p_picture = NULL;

    if( p_fmt->i_chroma == VLC_CODEC_TEXT )
        return p_region;

    p_region->p_picture = picture_NewFromFormat( p_fmt );
    if( !p_region->p_picture )
    {
        free( p_region->fmt.p_palette );
        free( p_region );
        return NULL;
    }

    return p_region;
}

picture_pool_t *picture_pool_NewFromFormat(const video_format_t *fmt, int picture_count)
{
//    picture_t *picture[picture_count];
	picture_t **picture = (picture_t **)calloc(picture_count, sizeof(picture_t *));			// sunqueen modify

    for (int i = 0; i < picture_count; i++) {
        picture[i] = picture_NewFromFormat(fmt);
        if (!picture[i])
            goto error;
    }
    picture_pool_t *pool = picture_pool_New(picture_count, picture);
    if (!pool)
        goto error;

	free(picture);			// sunqueen add
    return pool;

error:
    for (int i = 0; i < picture_count; i++) {
        if (!picture[i])
            break;
        picture_Release(picture[i]);
    }
	free(picture);			// sunqueen add
    return NULL;
}

/*****************************************************************************
 * Create
 *****************************************************************************/
static int Create( vlc_object_t *p_this )
{
    filter_t *p_filter = (filter_t *)p_this;

    const vlc_chroma_description_t *p_chroma =
        vlc_fourcc_GetChromaDescription( p_filter->fmt_in.video.i_chroma );
    if( p_chroma == NULL || p_chroma->plane_count == 0 )
        return VLC_EGENERIC;

    /* Allocate structure */
    p_filter->p_sys = malloc( sizeof( filter_sys_t ) );
    if( p_filter->p_sys == NULL )
        return VLC_ENOMEM;

    p_filter->p_sys->p_tmp = picture_NewFromFormat( &p_filter->fmt_in.video );
    if( !p_filter->p_sys->p_tmp )
    {
        free( p_filter->p_sys );
        return VLC_ENOMEM;
    }
    p_filter->p_sys->b_first = true;

    p_filter->pf_video_filter = Filter;

    config_ChainParse( p_filter, FILTER_PREFIX, ppsz_filter_options,
                       p_filter->p_cfg );

    atomic_init( &p_filter->p_sys->i_factor,
             var_CreateGetIntegerCommand( p_filter, FILTER_PREFIX "factor" ) );
    var_AddCallback( p_filter, FILTER_PREFIX "factor",
                     MotionBlurCallback, p_filter->p_sys );


    return VLC_SUCCESS;
}

static picture_t *Deinterlace(filter_t *filter, picture_t *src)
{
    filter_sys_t *sys = filter->p_sys;
    mtime_t last_pts = sys->last_pts;

    sys->last_pts = src->date;

    vlc_vdp_video_field_t *f1 = src->context;
    if (unlikely(f1 == NULL))
        return src;
    if (f1->structure != VDP_VIDEO_MIXER_PICTURE_STRUCTURE_FRAME)
        return src; /* cannot deinterlace twice */

#ifdef VOUT_CORE_GETS_A_CLUE
    picture_t *dst = filter_NewPicture(filter);
#else
    picture_t *dst = picture_NewFromFormat(&src->format);
#endif
    if (dst == NULL)
        return src; /* cannot deinterlace without copying fields */

    vlc_vdp_video_field_t *f2 = vlc_vdp_video_copy(f1); // shallow copy
    if (unlikely(f2 == NULL))
    {
        picture_Release(dst);
        return src;
    }

    picture_CopyProperties(dst, src);
    dst->context = f2;

    if (last_pts != VLC_TS_INVALID)
        dst->date = (3 * src->date - last_pts) / 2;
    else
    if (filter->fmt_in.video.i_frame_rate != 0)
        dst->date = src->date + ((filter->fmt_in.video.i_frame_rate_base
                            * CLOCK_FREQ) / filter->fmt_in.video.i_frame_rate);
    dst->b_top_field_first = !src->b_top_field_first;
    dst->i_nb_fields = 1;
    src->i_nb_fields = 1;

    assert(src->p_next == NULL);
    src->p_next = dst;

    if (src->b_progressive || src->b_top_field_first)
    {
        f1->structure = VDP_VIDEO_MIXER_PICTURE_STRUCTURE_TOP_FIELD;
        f2->structure = VDP_VIDEO_MIXER_PICTURE_STRUCTURE_BOTTOM_FIELD;
    }
    else
    {
        f1->structure = VDP_VIDEO_MIXER_PICTURE_STRUCTURE_BOTTOM_FIELD;
        f2->structure = VDP_VIDEO_MIXER_PICTURE_STRUCTURE_TOP_FIELD;
    }

    src->b_progressive = true;
    dst->b_progressive = true;
    return src;
}

/* Internal video allocator functions */
static picture_t *VideoBufferNew( filter_t *p_filter )
{
    const video_format_t *p_fmt = &p_filter->fmt_out.video;

    picture_t *p_picture = picture_NewFromFormat( p_fmt );
    if( !p_picture )
        msg_Err( p_filter, "Failed to allocate picture" );
    return p_picture;
}

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

    if (!p_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 (p_sys->conn, p_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);
        memset (p_sys->resource, 0, sizeof(p_sys->resource));

        unsigned count;
        picture_t *pic_array[MAX_PICTURES];
        for (count = 0; count < MAX_PICTURES; count++)
        {
            picture_resource_t *res = &p_sys->resource[count];

            res->p->i_lines = pic->p->i_lines;
            res->p->i_pitch = pic->p->i_pitch;
            if (PictureResourceAlloc (vd, res, res->p->i_pitch * res->p->i_lines,
                                      p_sys->conn, p_sys->shm))
                break;
            pic_array[count] = picture_NewFromResource (&vd->fmt, res);
            if (!pic_array[count])
            {
                PictureResourceFree (res, p_sys->conn);
                memset (res, 0, sizeof(*res));
                break;
            }
        }
        picture_Release (pic);

        if (count == 0)
            return NULL;

        p_sys->pool = picture_pool_New (count, pic_array);
        /* TODO release picture resources if NULL */
        xcb_flush (p_sys->conn);
    }

    return p_sys->pool;
}

inline static picture_t *video_new_buffer_filter( filter_t *p_filter )
{
    if( video_update_format( VLC_OBJECT( p_filter ),
                             (decoder_owner_sys_t *)p_filter->owner.sys,
                             &p_filter->fmt_out ) ) {
        msg_Warn( p_filter, "can't get output picture" );
        return NULL;
    }
    return picture_NewFromFormat( &p_filter->fmt_out.video );
}

picture_t *picture_New( vlc_fourcc_t i_chroma, int i_width, int i_height, int i_sar_num, int i_sar_den )
{
    video_format_t fmt;

    memset( &fmt, 0, sizeof(fmt) );
    video_format_Setup( &fmt, i_chroma, i_width, i_height,
                        i_width, i_height, i_sar_num, i_sar_den );

    return picture_NewFromFormat( &fmt );
}

/**
 * @brief Thread reading frames from the subprocess
 */
static void* outputThread(void* userData)
{
    filter_t*    intf = (filter_t*)userData;
    filter_sys_t* sys = intf->p_sys;

    msg_Info(intf, "outputThread: enter");

    bool gotHeader = false;

    while (true)
    {
        if (!gotHeader)
        {
            video_format_Init(&sys->outFormat, VLC_CODEC_I420);
            if (1 != readY4mHeader(intf, &sys->outFormat, sys->stdout))
                break;
            gotHeader = true;
        }

        picture_t* outPic = picture_NewFromFormat(&sys->outFormat);
        if(1 != readY4mFrame(intf, outPic, sys->stdout))
        {
            picture_Release(outPic);
            break;
        }

        //msg_Info(intf, "outputThread: read picture");

        // fixme: deinterlace filter does this, not sure if we need to;
        // y4m header contains this information
        outPic->b_progressive = true;
        outPic->i_nb_fields = 2;

        picture_fifo_Push(sys->outputFifo, outPic);

        vlc_cond_signal(&sys->outputCond);
    }

    msg_Info(intf, "outputThread: exit");

    sys->threadExit = true;
    vlc_cond_signal(&sys->outputCond);

    return userData;
}

/**
 * It updates a picture data/pitches.
 */
int CommonUpdatePicture(picture_t *picture, picture_t **fallback,
                        uint8_t *data, unsigned pitch)
{
    if (fallback) {
        if (*fallback == NULL) {
            *fallback = picture_NewFromFormat(&picture->format);
            if (*fallback == NULL)
                return VLC_EGENERIC;
        }
        for (int n = 0; n < picture->i_planes; n++) {
            const plane_t *src = &(*fallback)->p[n];
            plane_t       *dst = &picture->p[n];
            dst->p_pixels = src->p_pixels;
            dst->i_pitch  = src->i_pitch;
            dst->i_lines  = src->i_lines;
        }
        return VLC_SUCCESS;
    }
    /* fill in buffer info in first plane */
    picture->p->p_pixels = data;
    picture->p->i_pitch  = pitch;
    picture->p->i_lines  = picture->format.i_height;

    /*  Fill chroma planes for planar YUV */
    if (picture->format.i_chroma == VLC_CODEC_I420 ||
            picture->format.i_chroma == VLC_CODEC_J420 ||
            picture->format.i_chroma == VLC_CODEC_YV12) {

        for (int n = 1; n < picture->i_planes; n++) {
            const plane_t *o = &picture->p[n-1];
            plane_t *p = &picture->p[n];

            p->p_pixels = o->p_pixels + o->i_lines * o->i_pitch;
            p->i_pitch  = pitch / 2;
            p->i_lines  = picture->format.i_height / 2;
        }
        /* The dx/d3d buffer is always allocated as YV12 */
        if (vlc_fourcc_AreUVPlanesSwapped(picture->format.i_chroma, VLC_CODEC_YV12)) {
            uint8_t *p_tmp = picture->p[1].p_pixels;
            picture->p[1].p_pixels = picture->p[2].p_pixels;
            picture->p[2].p_pixels = p_tmp;
        }
    }
    return VLC_SUCCESS;
}

subpicture_region_t *subpicture_region_New( const video_format_t *p_fmt )
{
    subpicture_region_t *p_region = calloc( 1, sizeof(*p_region ) );
    if( !p_region )
        return NULL;

    if ( p_fmt->i_chroma == VLC_CODEC_YUVP )
    {
        video_format_Copy( &p_region->fmt, p_fmt );
        /* YUVP should have a palette */
        if( p_region->fmt.p_palette == NULL )
        {
            p_region->fmt.p_palette = calloc( 1, sizeof(*p_region->fmt.p_palette) );
            if( p_region->fmt.p_palette == NULL )
            {
                free( p_region );
                return NULL;
            }
        }
    }
    else
    {
        p_region->fmt = *p_fmt;
        p_region->fmt.p_palette = NULL;
    }

    p_region->i_alpha = 0xff;

    if( p_fmt->i_chroma == VLC_CODEC_TEXT )
        return p_region;

    p_region->p_picture = picture_NewFromFormat( p_fmt );
    if( !p_region->p_picture )
    {
        video_format_Clean( &p_region->fmt );
        free( p_region );
        return NULL;
    }

    return p_region;
}