C++ (Cpp) open_clamp_streamfile Examples

Example #1

static STREAMFILE* setup_bgw_atrac3_streamfile(STREAMFILE *streamFile, off_t subfile_offset, size_t subfile_size, size_t frame_size, int channels) {
    STREAMFILE *temp_streamFile = NULL, *new_streamFile = NULL;
    bgw_decryption_data io_data = {0};
    size_t io_data_size = sizeof(bgw_decryption_data);
    int ch;

    /* setup decryption with key (first frame + modified channel header) */
    if (frame_size*channels == 0 || frame_size*channels > BGW_KEY_MAX) goto fail;

    io_data.key_size = read_streamfile(io_data.key, subfile_offset, frame_size*channels, streamFile);
    for (ch = 0; ch < channels; ch++) {
        uint32_t xor = get_32bitBE(io_data.key + frame_size*ch);
        put_32bitBE(io_data.key + frame_size*ch, xor ^ 0xA0024E9F);
    }

    /* setup subfile */
    new_streamFile = open_wrap_streamfile(streamFile);
    if (!new_streamFile) goto fail;
    temp_streamFile = new_streamFile;

    new_streamFile = open_clamp_streamfile(temp_streamFile, subfile_offset,subfile_size);
    if (!new_streamFile) goto fail;
    temp_streamFile = new_streamFile;

    new_streamFile = open_io_streamfile(temp_streamFile, &io_data,io_data_size, bgw_decryption_read,NULL);
    if (!new_streamFile) goto fail;
    temp_streamFile = new_streamFile;

    return temp_streamFile;

fail:
    close_streamfile(temp_streamFile);
    return NULL;
}

Example #2

static STREAMFILE *clamp_open(CLAMP_STREAMFILE *streamfile, const char * const filename, size_t buffersize) {
    char original_filename[PATH_LIMIT];
    STREAMFILE *new_inner_sf;

    new_inner_sf = streamfile->inner_sf->open(streamfile->inner_sf,filename,buffersize);
    streamfile->inner_sf->get_name(streamfile->inner_sf, original_filename, PATH_LIMIT);

    /* detect re-opening the file */
    if (strcmp(filename, original_filename) == 0) {
        return open_clamp_streamfile(new_inner_sf, streamfile->start, streamfile->size); /* clamp again */
    } else {
        return new_inner_sf; /**/
    }
}