mosaic_bridge.c

uclinux 下的vlc播放器源代码

    bridged_es_t *p_es;
    vlc_bool_t b_last_es = VLC_TRUE;
    int i;

    if ( !p_sys->b_inited )
    {
        return VLC_SUCCESS;
    }

    if ( p_sys->p_decoder != NULL )
    {
        picture_t **pp_ring = p_sys->p_decoder->p_owner->pp_pics;

        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_destroy( p_sys->p_decoder );

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

    vlc_mutex_lock( p_sys->p_lock );

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

    p_es->b_empty = VLC_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 = VLC_FALSE;
            break;
        }
    }

    if ( b_last_es )
    {
        libvlc_t *p_libvlc = 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->i_height || p_sys->i_width )
    {
        image_HandlerDelete( p_sys->p_image );
    }

    p_sys->b_inited = VLC_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;

            fmt_out.i_chroma = VLC_FOURCC('Y','U','V','A');

            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" );
                continue;
            }
        }
        else
        {
            p_new_pic = (picture_t*)malloc( sizeof(picture_t) );
            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 );

            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;

        p_pic->pf_release( p_pic );
        PushPicture( p_stream, p_new_pic );
    }

    return VLC_SUCCESS;
}

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

static void video_release_buffer( picture_t *p_pic )
{
    if( p_pic && !p_pic->i_refcount && p_pic->pf_release && p_pic->p_sys )
    {
        video_del_buffer( (decoder_t *)p_pic->p_sys->p_owner, p_pic );
    }
    else if( p_pic && p_pic->i_refcount > 0 ) p_pic->i_refcount--;
}

static picture_t *video_new_buffer( decoder_t *p_dec )
{
    decoder_owner_sys_t *p_sys = (decoder_owner_sys_t *)p_dec->p_owner;
    picture_t **pp_ring = p_dec->p_owner->pp_pics;
    picture_t *p_pic;
    int i;

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

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

        vlc_ureduce( &p_dec->fmt_out.video.i_sar_num,
                     &p_dec->fmt_out.video.i_sar_den,
                     p_dec->fmt_out.video.i_sar_num,
                     p_dec->fmt_out.video.i_sar_den, 0 );

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

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

        for( i = 0; i < PICTURE_RING_SIZE; i++ )
        {
            if ( pp_ring[i] != NULL )
            {
                if ( pp_ring[i]->i_status == DESTROYED_PICTURE )
                {
                    if ( pp_ring[i]->p_data_orig != NULL )
                        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 = VLC_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;
            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_dec, "decoder/filter is leaking pictures, "
                 "resetting its ring buffer" );

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

        i = 0;
    }

    p_pic = malloc( sizeof(picture_t) );
    p_dec->fmt_out.video.i_chroma = p_dec->fmt_out.i_codec;
    vout_AllocatePicture( VLC_OBJECT(p_dec), p_pic,
                          p_dec->fmt_out.video.i_chroma,
                          p_dec->fmt_out.video.i_width,
                          p_dec->fmt_out.video.i_height,
                          p_dec->fmt_out.video.i_aspect );

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

    p_pic->pf_release = video_release_buffer;
    p_pic->p_sys = malloc( sizeof(picture_sys_t) );
    p_pic->p_sys->p_owner = VLC_OBJECT(p_dec);
    p_pic->p_sys->b_dead = VLC_FALSE;
    p_pic->i_status = RESERVED_PICTURE;

    pp_ring[i] = p_pic;

    return p_pic;
}

static void video_del_buffer( decoder_t *p_this, picture_t *p_pic )
{
    p_pic->i_refcount = 0;
    p_pic->i_status = DESTROYED_PICTURE;
    if ( p_pic->p_sys->b_dead )
    {
        if ( p_pic->p_data_orig != NULL )
            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 )
{
    p_pic->i_refcount++;
}

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