libasf.c

video linux conference

    }

#ifdef ASF_DEBUG
    msg_Dbg( s,
            "read \"metadata object\" %d entries",
            p_meta->i_record_entries_count );
    for( i = 0; i < p_meta->i_record_entries_count; i++ )
    {
        asf_metadata_record_t *p_rec = &p_meta->record[i];
        
        if( p_rec->i_type == ASF_METADATA_TYPE_STRING )
            msg_Dbg( s, "  - %s=%s",
                     p_rec->psz_name, p_rec->p_data );
        else if( p_rec->i_type == ASF_METADATA_TYPE_BYTE )
            msg_Dbg( s, "  - %s (%i bytes)",
                     p_rec->psz_name, p_rec->i_data );
        else
            msg_Dbg( s, "  - %s="I64Fd,
                     p_rec->psz_name, p_rec->i_val );
    }
#endif

    return VLC_SUCCESS;
}

static int ASF_ReadObject_header_extension( stream_t *s, asf_object_t *p_obj )
{
    asf_object_header_extension_t *p_he =
        (asf_object_header_extension_t *)p_obj;
    int     i_peek;
    uint8_t *p_peek;

    if( ( i_peek = stream_Peek( s, &p_peek, p_he->i_object_size ) ) <  46)
    {
       return VLC_EGENERIC;
    }
    ASF_GetGUID( &p_he->i_reserved1, p_peek + 24 );
    p_he->i_reserved2 = GetWLE( p_peek + 40 );
    p_he->i_header_extension_size = GetDWLE( p_peek + 42 );
    if( p_he->i_header_extension_size )
    {
        p_he->p_header_extension_data =
            malloc( p_he->i_header_extension_size );
        memcpy( p_he->p_header_extension_data, p_peek + 46,
                p_he->i_header_extension_size );
    }
    else
    {
        p_he->p_header_extension_data = NULL;
    }

#ifdef ASF_DEBUG
    msg_Dbg( s,
            "read \"header extension object\" reserved1:" GUID_FMT
            " reserved2:%d header_extension_size:%d",
            GUID_PRINT( p_he->i_reserved1 ), p_he->i_reserved2,
            p_he->i_header_extension_size );
#endif

    if( !p_he->i_header_extension_size ) return VLC_SUCCESS;

    /* Read the extension objects */
    stream_Read( s, NULL, 46 );
    for( ; ; )
    {
        asf_object_t *p_obj = malloc( sizeof( asf_object_t ) );

        if( ASF_ReadObject( s, p_obj, (asf_object_t*)p_he ) )
        {
            free( p_obj );
            break;
        }

        if( ASF_NextObject( s, p_obj ) ) /* Go to the next object */
        {
            break;
        }
    }

    return VLC_SUCCESS;
}

static void ASF_FreeObject_header_extension( asf_object_t *p_obj )
{
    asf_object_header_extension_t *p_he =
        (asf_object_header_extension_t *)p_obj;

    FREE( p_he->p_header_extension_data );
}

static int ASF_ReadObject_stream_properties( stream_t *s, asf_object_t *p_obj )
{
    asf_object_stream_properties_t *p_sp =
                    (asf_object_stream_properties_t*)p_obj;
    int     i_peek;
    uint8_t *p_peek;

    if( ( i_peek = stream_Peek( s, &p_peek,  p_sp->i_object_size ) ) < 74 )
    {
       return VLC_EGENERIC;
    }
    ASF_GetGUID( &p_sp->i_stream_type, p_peek + 24 );
    ASF_GetGUID( &p_sp->i_error_correction_type, p_peek + 40 );
    p_sp->i_time_offset = GetQWLE( p_peek + 56 );
    p_sp->i_type_specific_data_length = GetDWLE( p_peek + 64 );
    p_sp->i_error_correction_data_length = GetDWLE( p_peek + 68 );
    p_sp->i_flags = GetWLE( p_peek + 72 );
        p_sp->i_stream_number = p_sp->i_flags&0x07f;
    p_sp->i_reserved = GetDWLE( p_peek + 74 );
    if( p_sp->i_type_specific_data_length )
    {
        p_sp->p_type_specific_data =
            malloc( p_sp->i_type_specific_data_length );
        memcpy( p_sp->p_type_specific_data, p_peek + 78,
                p_sp->i_type_specific_data_length );
    }
    else
    {
        p_sp->p_type_specific_data = NULL;
    }
    if( p_sp->i_error_correction_data_length )
    {
        p_sp->p_error_correction_data =
            malloc( p_sp->i_error_correction_data_length );
        memcpy( p_sp->p_error_correction_data,
                p_peek + 78 + p_sp->i_type_specific_data_length,
                p_sp->i_error_correction_data_length );
    }
    else
    {
        p_sp->p_error_correction_data = NULL;
    }

#ifdef ASF_DEBUG
    msg_Dbg( s,
            "read \"stream Properties object\" stream_type:" GUID_FMT
            " error_correction_type:" GUID_FMT " time_offset:"I64Fd
            " type_specific_data_length:%d error_correction_data_length:%d"
            " flags:0x%x stream_number:%d",
            GUID_PRINT( p_sp->i_stream_type ),
            GUID_PRINT( p_sp->i_error_correction_type ),
            p_sp->i_time_offset,
            p_sp->i_type_specific_data_length,
            p_sp->i_error_correction_data_length,
            p_sp->i_flags,
            p_sp->i_stream_number );

#endif
    return VLC_SUCCESS;
}

static void ASF_FreeObject_stream_properties( asf_object_t *p_obj )
{
    asf_object_stream_properties_t *p_sp =
                (asf_object_stream_properties_t*)p_obj;

    FREE( p_sp->p_type_specific_data );
    FREE( p_sp->p_error_correction_data );
}


static int ASF_ReadObject_codec_list( stream_t *s, asf_object_t *p_obj )
{
    asf_object_codec_list_t *p_cl = (asf_object_codec_list_t*)p_obj;
    int     i_peek;
    uint8_t *p_peek, *p_data;

    unsigned int i_codec;

    if( ( i_peek = stream_Peek( s, &p_peek, p_cl->i_object_size ) ) < 44 )
    {
       return VLC_EGENERIC;
    }

    ASF_GetGUID( &p_cl->i_reserved, p_peek + 24 );
    p_cl->i_codec_entries_count = GetWLE( p_peek + 40 );
    if( p_cl->i_codec_entries_count > 0 )
    {
        p_cl->codec = calloc( p_cl->i_codec_entries_count,
                              sizeof( asf_codec_entry_t ) );
        memset( p_cl->codec, 0,
                p_cl->i_codec_entries_count * sizeof( asf_codec_entry_t ) );

        p_data = p_peek + 44;
        for( i_codec = 0; i_codec < p_cl->i_codec_entries_count; i_codec++ )
        {
#define codec p_cl->codec[i_codec]
            int i_len, i;

            codec.i_type = GetWLE( p_data ); p_data += 2;
            /* codec name */
            i_len = GetWLE( p_data ); p_data += 2;
            codec.psz_name = calloc( sizeof( char ), i_len + 1);
            for( i = 0; i < i_len; i++ )
            {
                codec.psz_name[i] = GetWLE( p_data + 2*i );
            }
            codec.psz_name[i_len] = '\0';
            p_data += 2 * i_len;

            /* description */
            i_len = GetWLE( p_data ); p_data += 2;
            codec.psz_description = calloc( sizeof( char ), i_len + 1);
            for( i = 0; i < i_len; i++ )
            {
                codec.psz_description[i] = GetWLE( p_data + 2*i );
            }
            codec.psz_description[i_len] = '\0';
            p_data += 2 * i_len;

            /* opaque information */
            codec.i_information_length = GetWLE( p_data ); p_data += 2;
            if( codec.i_information_length > 0 )
            {
                codec.p_information = malloc( codec.i_information_length );
                memcpy( codec.p_information, p_data, codec.i_information_length );
                p_data += codec.i_information_length;
            }
            else
            {
                codec.p_information = NULL;
            }
#undef  codec
        }
    }
    else
    {
        p_cl->codec = NULL;
    }

#ifdef ASF_DEBUG
    msg_Dbg( s, "read \"codec list object\" reserved_guid:" GUID_FMT
             " codec_entries_count:%d",
            GUID_PRINT( p_cl->i_reserved ), p_cl->i_codec_entries_count );

    for( i_codec = 0; i_codec < p_cl->i_codec_entries_count; i_codec++ )
    {
#define codec p_cl->codec[i_codec]
        msg_Dbg( s, "  - codec[%d] %s name:\"%s\" "
                 "description:\"%s\" information_length:%d",
                 i_codec, ( codec.i_type == ASF_CODEC_TYPE_VIDEO ) ?
                 "video" : ( ( codec.i_type == ASF_CODEC_TYPE_AUDIO ) ?
                 "audio" : "unknown" ),
                 codec.psz_name, codec.psz_description,
                 codec.i_information_length );
#undef  codec
    }
#endif

    return VLC_SUCCESS;
}

static void ASF_FreeObject_codec_list( asf_object_t *p_obj )
{
    asf_object_codec_list_t *p_cl = (asf_object_codec_list_t*)p_obj;
    unsigned int i_codec;

    for( i_codec = 0; i_codec < p_cl->i_codec_entries_count; i_codec++ )
    {
#define codec p_cl->codec[i_codec]
        FREE( codec.psz_name );
        FREE( codec.psz_description );
        FREE( codec.p_information );
#undef  codec
    }
    FREE( p_cl->codec );
}

/* Microsoft should go to hell. This time the length give number of bytes
 * and for the some others object, length give char16 count ... */
static int ASF_ReadObject_content_description(stream_t *s, asf_object_t *p_obj)
{
    asf_object_content_description_t *p_cd =
        (asf_object_content_description_t *)p_obj;
    uint8_t *p_peek, *p_data;
    int i_peek;
    int i_len, i_title, i_author, i_copyright, i_description, i_rating;

#define GETSTRINGW( psz_str, i_size ) \
   psz_str = calloc( i_size/2 + 1, sizeof( char ) ); \
   for( i_len = 0; i_len < i_size/2; i_len++ ) \
   { \
       psz_str[i_len] = GetWLE( p_data + 2*i_len ); \
   } \
   psz_str[i_size/2] = '\0'; \
   p_data += i_size;

    if( ( i_peek = stream_Peek( s, &p_peek, p_cd->i_object_size ) ) < 34 )
    {
       return VLC_EGENERIC;
    }
    p_data = p_peek + 24;

    i_title = GetWLE( p_data ); p_data += 2;
    i_author= GetWLE( p_data ); p_data += 2;
    i_copyright     = GetWLE( p_data ); p_data += 2;
    i_description   = GetWLE( p_data ); p_data += 2;
    i_rating        = GetWLE( p_data ); p_data += 2;

    GETSTRINGW( p_cd->psz_title, i_title );
    GETSTRINGW( p_cd->psz_author, i_author );
    GETSTRINGW( p_cd->psz_copyright, i_copyright );
    GETSTRINGW( p_cd->psz_description, i_description );
    GETSTRINGW( p_cd->psz_rating, i_rating );

#undef  GETSTRINGW

#ifdef ASF_DEBUG
    msg_Dbg( s,
             "Read \"content description object\" title:\"%s\" author:\"%s\" copyright:\"%s\" description:\"%s\" rating:\"%s\"",
             p_cd->psz_title,
             p_cd->psz_author,
             p_cd->psz_copyright,
             p_cd->psz_description,
             p_cd->psz_rating );
#endif
    return VLC_SUCCESS;
}

static void ASF_FreeObject_content_description( asf_object_t *p_obj)
{
    asf_object_content_description_t *p_cd =
        (asf_object_content_description_t *)p_obj;

    FREE( p_cd->psz_title );
    FREE( p_cd->psz_author );
    FREE( p_cd->psz_copyright );
    FREE( p_cd->psz_description );
    FREE( p_cd->psz_rating );
}

/* Language list: */
static int ASF_ReadObject_language_list(stream_t *s, asf_object_t *p_obj)
{
    asf_object_language_list_t *p_ll =
        (asf_object_language_list_t*)p_obj;
    uint8_t *p_peek, *p_data;
    int i_peek;
    int i;

    if( ( i_peek = stream_Peek( s, &p_peek, p_ll->i_object_size ) ) < 26 )
       return VLC_EGENERIC;

    p_data = &p_peek[24];

    p_ll->i_language = GetWLE( &p_data[0] ); p_data += 2;
    if( p_ll->i_language > 0 )
    {
        p_ll->ppsz_language = calloc( p_ll->i_language, sizeof( char *) );

        for( i = 0; i < p_ll->i_language; i++ )
        {
            char *psz;
            int i_size = *p_data++;
            int i_len;

            psz = calloc( i_size/2 + 1, sizeof( char ) );
            for( i_len = 0; i_len < i_size/2; i_len++ )
            {
                psz[i_len] = GetWLE( p_data + 2*i_len );
            }
            psz[i_size/2] = '\0'; \
            p_data += i_size;

            p_ll->ppsz_language[i] = psz;
        }
    }

#ifdef ASF_DEBUG
    msg_Dbg( s, "Read \"language list object\" %d entries", 
             p_ll->i_language );
    for( i = 0; i < p_ll->i_language; i++ )
        msg_Dbg( s, "  - '%s'", 
                 p_ll->ppsz_language[i] );
#endif
    return VLC_SUCCESS;
}

static void ASF_FreeObject_language_list( asf_object_t *p_obj)
{
    asf_object_language_list_t *p_ll =
        (asf_object_language_list_t *)p_obj;
    int i;

    for( i = 0; i < p_ll->i_language; i++ )
        FREE( p_ll->ppsz_language[i] );
    FREE( p_ll->ppsz_language );
}

/* Stream bitrate properties */
static int ASF_ReadObject_stream_bitrate_properties( stream_t *s,
                                                     asf_object_t *p_obj)
{
    asf_object_stream_bitrate_properties_t *p_sb =
        (asf_object_stream_bitrate_properties_t *)p_obj;
    uint8_t *p_peek, *p_data;
    int i_peek;