mosaic_bridge.c

VLC Player Source Code

        if( p_sys->p_decoder->p_module )
            module_Unneed( p_sys->p_decoder, p_sys->p_decoder->p_module );
        vlc_object_detach( p_sys->p_decoder );
        vlc_object_release( p_sys->p_decoder );

        picture_t **pp_ring = p_owner->pp_pics;
        for( i = 0; i < PICTURE_RING_SIZE; i++ )
        {
            if ( pp_ring[i] != NULL )
            {
                free( pp_ring[i]->p_data_orig );
                free( pp_ring[i]->p_sys );
                free( pp_ring[i] );
            }
        }
        free( p_owner );
    }

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

    vlc_mutex_lock( p_sys->p_lock );

    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;
        p_es->p_picture->pf_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_mutex_unlock( p_sys->p_lock );

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

    p_sys->b_inited = false;

    return VLC_SUCCESS;
}

/*****************************************************************************
 * PushPicture : push a picture in the mosaic-struct structure
 *****************************************************************************/
static void PushPicture( sout_stream_t *p_stream, picture_t *p_picture )
{
    sout_stream_sys_t *p_sys = p_stream->p_sys;
    bridged_es_t *p_es = p_sys->p_es;

    vlc_mutex_lock( p_sys->p_lock );

    *p_es->pp_last = p_picture;
    p_picture->p_next = NULL;
    p_es->pp_last = &p_picture->p_next;

    vlc_mutex_unlock( p_sys->p_lock );
}

static int Send( sout_stream_t *p_stream, sout_stream_id_t *id,
                 block_t *p_buffer )
{
    sout_stream_sys_t *p_sys = p_stream->p_sys;
    picture_t *p_pic;

    if ( (sout_stream_sys_t *)id != p_sys )
    {
        block_ChainRelease( p_buffer );
        return VLC_SUCCESS;
    }

    while ( (p_pic = p_sys->p_decoder->pf_decode_video( p_sys->p_decoder,
                                                        &p_buffer )) )
    {
        picture_t *p_new_pic;

        if( p_sys->i_height || p_sys->i_width )
        {
            video_format_t fmt_out, fmt_in;

            memset( &fmt_in, 0, sizeof(video_format_t) );
            memset( &fmt_out, 0, sizeof(video_format_t) );
            fmt_in = p_sys->p_decoder->fmt_out.video;


            if( p_sys->i_chroma )
                fmt_out.i_chroma = p_sys->i_chroma;
            else
                fmt_out.i_chroma = VLC_FOURCC('I','4','2','0');

            if ( !p_sys->i_height )
            {
                fmt_out.i_width = p_sys->i_width;
                fmt_out.i_height = (p_sys->i_width * VOUT_ASPECT_FACTOR
                    * p_sys->i_sar_num / p_sys->i_sar_den / fmt_in.i_aspect)
                      & ~0x1;
            }
            else if ( !p_sys->i_width )
            {
                fmt_out.i_height = p_sys->i_height;
                fmt_out.i_width = (p_sys->i_height * fmt_in.i_aspect
                    * p_sys->i_sar_den / p_sys->i_sar_num / VOUT_ASPECT_FACTOR)
                      & ~0x1;
            }
            else
            {
                fmt_out.i_width = p_sys->i_width;
                fmt_out.i_height = p_sys->i_height;
            }
            fmt_out.i_visible_width = fmt_out.i_width;
            fmt_out.i_visible_height = fmt_out.i_height;

            p_new_pic = image_Convert( p_sys->p_image,
                                       p_pic, &fmt_in, &fmt_out );
            if ( p_new_pic == NULL )
            {
                msg_Err( p_stream, "image conversion failed" );
                picture_Release( p_pic );
                continue;
            }
        }
        else
        {
            /* TODO: chroma conversion if needed */

            p_new_pic = (picture_t*)malloc( sizeof(picture_t) );
            if( p_new_pic == NULL )
            {
                msg_Err( p_stream, "image conversion failed" );
                continue;
            }

            if( vout_AllocatePicture(
                                  p_stream, p_new_pic, p_pic->format.i_chroma,
                                  p_pic->format.i_width, p_pic->format.i_height,
                                  p_sys->p_decoder->fmt_out.video.i_aspect )
                != VLC_SUCCESS )
            {
                picture_Release( p_pic );
                free( p_new_pic );
                msg_Err( p_stream, "image allocation failed" );
                continue;
            }

            vout_CopyPicture( p_stream, p_new_pic, p_pic );
        }

        p_new_pic->i_refcount = 1;
        p_new_pic->i_status = DESTROYED_PICTURE;
        p_new_pic->i_type   = DIRECT_PICTURE;
        p_new_pic->p_sys = (picture_sys_t *)p_new_pic->pf_release;
        p_new_pic->pf_release = ReleasePicture;
        p_new_pic->date = p_pic->date;
        picture_Release( p_pic );

        if( p_sys->p_vf2 )
            p_new_pic = filter_chain_VideoFilter( p_sys->p_vf2, p_new_pic );

        PushPicture( p_stream, p_new_pic );
    }

    return VLC_SUCCESS;
}

struct picture_sys_t
{
    vlc_object_t *p_owner;
    bool b_dead;
};

static void video_release_buffer_decoder( picture_t *p_pic )
{
    assert( p_pic && p_pic->p_sys );

    if( --p_pic->i_refcount > 0 )
        return;

    video_del_buffer_decoder( (decoder_t *)p_pic->p_sys->p_owner, p_pic );
}

static void video_release_buffer_filter( picture_t *p_pic )
{
    assert( p_pic );

    if( --p_pic->i_refcount > 0 )
        return;

    assert( p_pic->p_sys );

    video_del_buffer_filter( (filter_t *)p_pic->p_sys->p_owner, p_pic );
}

inline static picture_t *video_new_buffer_decoder( decoder_t *p_dec )
{
    return video_new_buffer( VLC_OBJECT( p_dec ),
                             (decoder_owner_sys_t *)p_dec->p_owner,
                             &p_dec->fmt_out,
                             video_release_buffer_decoder );
}

inline static picture_t *video_new_buffer_filter( filter_t *p_filter )
{
    return video_new_buffer( VLC_OBJECT( p_filter ),
                             (decoder_owner_sys_t *)p_filter->p_owner,
                             &p_filter->fmt_out,
                             video_release_buffer_filter );
}

static picture_t *video_new_buffer( vlc_object_t *p_this,
                                    decoder_owner_sys_t *p_sys,
                                    es_format_t *fmt_out,
                                    void ( *pf_release )( picture_t * ) )
{
    picture_t **pp_ring = p_sys->pp_pics;
    picture_t *p_pic;
    int i;

    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 ||
        fmt_out->video.i_aspect != p_sys->video.i_aspect )
    {
        if( !fmt_out->video.i_sar_num ||
            !fmt_out->video.i_sar_den )
        {
            fmt_out->video.i_sar_num =
                fmt_out->video.i_aspect * fmt_out->video.i_height;

            fmt_out->video.i_sar_den =
                VOUT_ASPECT_FACTOR * fmt_out->video.i_width;
        }

        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;

        for( i = 0; i < PICTURE_RING_SIZE; i++ )
        {
            if ( pp_ring[i] != NULL )
            {
                if ( pp_ring[i]->i_status == DESTROYED_PICTURE )
                {
                    free( pp_ring[i]->p_data_orig );
                    free( pp_ring[i]->p_sys );
                    free( pp_ring[i] );
                }
                else
                {
                    pp_ring[i]->p_sys->b_dead = true;
                }
                pp_ring[i] = NULL;
            }
        }
    }

    /* Find an empty space in the picture ring buffer */
    for( i = 0; i < PICTURE_RING_SIZE; i++ )
    {
        if( pp_ring[i] != NULL && pp_ring[i]->i_status == DESTROYED_PICTURE )
        {
            pp_ring[i]->i_status = RESERVED_PICTURE;
            pp_ring[i]->i_refcount = 1;
            return pp_ring[i];
        }
    }
    for( i = 0; i < PICTURE_RING_SIZE; i++ )
    {
        if( pp_ring[i] == NULL ) break;
    }

    if( i == PICTURE_RING_SIZE )
    {
        msg_Err( p_this, "decoder/filter is leaking pictures, "
                 "resetting its ring buffer" );

        for( i = 0; i < PICTURE_RING_SIZE; i++ )
        {
            pp_ring[i]->p_sys->b_dead = true;
            pp_ring[i]->pf_release( pp_ring[i] );
            pp_ring[i] = NULL;
        }

        i = 0;
    }

    p_pic = malloc( sizeof(picture_t) );
    if( !p_pic ) return NULL;
    fmt_out->video.i_chroma = fmt_out->i_codec;
    if( vout_AllocatePicture( p_this, p_pic,
                          fmt_out->video.i_chroma,
                          fmt_out->video.i_width,
                          fmt_out->video.i_height,
                          fmt_out->video.i_aspect ) != VLC_SUCCESS )
    {
        free( p_pic );
        return NULL;
    }

    if( !p_pic->i_planes )
    {
        free( p_pic );
        return NULL;
    }

    p_pic->pf_release = pf_release;
    p_pic->i_refcount = 1;
    p_pic->p_sys = malloc( sizeof(picture_sys_t) );
    p_pic->p_sys->p_owner = p_this;
    p_pic->p_sys->b_dead = false;
    p_pic->i_status = RESERVED_PICTURE;

    pp_ring[i] = p_pic;

    return p_pic;
}

inline static void video_del_buffer_decoder( decoder_t *p_this,
                                             picture_t *p_pic )
{
    VLC_UNUSED(p_this);
    video_del_buffer( p_pic );
}

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

static void video_del_buffer( picture_t *p_pic )
{
    p_pic->i_refcount = 0;
    p_pic->i_status = DESTROYED_PICTURE;
    if ( p_pic->p_sys->b_dead )
    {
        free( p_pic->p_data_orig );
        free( p_pic->p_sys );
        free( p_pic );
    }
}

static void video_link_picture_decoder( decoder_t *p_dec, picture_t *p_pic )
{
    VLC_UNUSED(p_dec);
    p_pic->i_refcount++;
}

static void video_unlink_picture_decoder( decoder_t *p_dec, picture_t *p_pic )
{
    VLC_UNUSED(p_dec);
    video_release_buffer_decoder( p_pic );
}


/**********************************************************************
 * Callback to update (some) params on the fly
 **********************************************************************/
static int HeightCallback( vlc_object_t *p_this, char const *psz_var,
                           vlc_value_t oldval, vlc_value_t newval,
                           void *p_data )
{
    VLC_UNUSED(p_this); VLC_UNUSED(oldval); VLC_UNUSED(psz_var);
    sout_stream_t *p_stream = (sout_stream_t *)p_data;
    sout_stream_sys_t *p_sys = p_stream->p_sys;

    /* We create the handler before updating the value in p_sys
     * so we don't have to worry about locking */
    if( !p_sys->p_image && newval.i_int )
        p_sys->p_image = image_HandlerCreate( p_stream );
    p_sys->i_height = newval.i_int;

    return VLC_SUCCESS;
}

static int WidthCallback( vlc_object_t *p_this, char const *psz_var,
                           vlc_value_t oldval, vlc_value_t newval,
                           void *p_data )
{
    VLC_UNUSED(p_this); VLC_UNUSED(oldval); VLC_UNUSED(psz_var);
    sout_stream_t *p_stream = (sout_stream_t *)p_data;
    sout_stream_sys_t *p_sys = p_stream->p_sys;

    /* We create the handler before updating the value in p_sys
     * so we don't have to worry about locking */
    if( !p_sys->p_image && newval.i_int )
        p_sys->p_image = image_HandlerCreate( p_stream );
    p_sys->i_width = newval.i_int;

    return VLC_SUCCESS;
}

static int alphaCallback( vlc_object_t *p_this, char const *psz_var,
                          vlc_value_t oldval, vlc_value_t newval,
                          void *p_data )
{
    VLC_UNUSED(p_this); VLC_UNUSED(oldval); VLC_UNUSED(psz_var);
    sout_stream_t *p_stream = (sout_stream_t *)p_data;
    sout_stream_sys_t *p_sys = p_stream->p_sys;

    if( p_sys->p_es )
        p_sys->p_es->i_alpha = newval.i_int;

    return VLC_SUCCESS;
}

static int xCallback( vlc_object_t *p_this, char const *psz_var,
                      vlc_value_t oldval, vlc_value_t newval,
                      void *p_data )
{
    VLC_UNUSED(p_this); VLC_UNUSED(oldval); VLC_UNUSED(psz_var);
    sout_stream_t *p_stream = (sout_stream_t *)p_data;
    sout_stream_sys_t *p_sys = p_stream->p_sys;

    if( p_sys->p_es )
        p_sys->p_es->i_x = newval.i_int;

    return VLC_SUCCESS;
}

static int yCallback( vlc_object_t *p_this, char const *psz_var,
                      vlc_value_t oldval, vlc_value_t newval,
                      void *p_data )
{
    VLC_UNUSED(p_this); VLC_UNUSED(oldval); VLC_UNUSED(psz_var);
    sout_stream_t *p_stream = (sout_stream_t *)p_data;
    sout_stream_sys_t *p_sys = p_stream->p_sys;

    if( p_sys->p_es )
        p_sys->p_es->i_y = newval.i_int;

    return VLC_SUCCESS;
}